CN202510885U - Peripheral prepressing gasket - Google Patents

Abstract

The utility model discloses a peripheral prepressing gasket, and belongs to the technical field of gaskets. The peripheral prepressing gasket comprises a gasket body, and is characterized in that the gasket body comprises gasket inner rings and gasket outer rings, wherein the thickness of each of the gasket inner rings is greater than that of each of the gasket outer rings; the outer sides of the gasket outer rings are contacted with studs of bolts on flanges; and the gasket outer rings can be used as positioning rings. By the positioning rings, whether the bolts are contacted with the gasket outer rings is used as an evidence for judging correct positioning, so that the gasket is accurately positioned.

Description

A kind of periphery precompressed pad

Technical field

The utility model belongs to the pad technical field, especially relates to a kind of periphery precompressed pad.

Background technique

At present, in the joint of pipeline, gasket seal can be used usually in joints such as screw thread or plunger; Be used for media such as sealing oil, gas or water, be used for sealing between the general installation of pad and two flanges, flange is to make two interconnective parts of pipe, perforation on the flange; Flange is fixed through screw bolt and nut, and traditional pad external diameter is less, does not reach the double-screw bolt of bolt, when pad is installed; Especially under the state of flanged surface, be difficult to pad is positioned over the flange neutral position exactly, very inconvenience is installed, and move easily perpendicular to horizontal plane; Locate inaccurately, influence the sealing effect of pipeline, and the ordinary circumstance lower levelling plate is put down all; Lifting surface area is bigger, and moment of torsion was bigger when the workman installed, and was inconvenient to install.

Be described in detail referring to 10 installations of 1 pair of conventional spacers of accompanying drawing, be used for sealing between pad 10 general installations and two flanges 6, flange 6 is to make pipe 7 and pipe 7 interconnective parts; Perforation on the flange 6, flange 6 is fixing with nut 5 through bolt 3, and traditional pad 10 external diameters are less; Do not reach the double-screw bolt 4 of bolt 3, whether the workman can only confirm pad 10 in flange 6 central authorities by estimation, when especially pad 10 needs vertically to install; Will be more inconvenient, if but pad 10 do bigger, the double-screw bolt 4 that outer side surface touches bolt 3 can make the area of contact increase of flange 6 and pad 10 again; Can increase mounting torque, make the workman that effort more is installed.

Summary of the invention

The utility model is not enough to existing technology, and a kind of periphery precompressed pad is provided, and the outer ring of post forming can be used as positioning ring, not only can make things convenient for installing and locating, and can reduce mounting torque, makes installation more laborsaving.

In order to solve the problems of the technologies described above, the utility model is able to solve through following technical proposals: a kind of periphery precompressed pad, comprise shim body, and said pad inner ring thickness is greater than the pad outer ring, and the double-screw bolt of bolt contacts on side, said pad outer ring and the flange.

The utility model compared with prior art; Have following beneficial effect: the pad outer ring of post forming can be used as positioning ring; There has been positioning ring just can whether to contact the basis for estimation of location, made the pad location more accurate, and reduced lifting surface area according to bolt and pad outer ring as whether accurately; Promptly reduce mounting torque, made things convenient for the workman to install.

Description of drawings

Fig. 1 is installed in the schematic representation on the flange for existing flat gasket.

Fig. 2 is the utility model embodiment's a structural representation.

Fig. 3 is the utility model embodiment's a sectional view.

Fig. 4 is the utility model embodiment's a scheme of installation.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail: referring to Fig. 2 to 4, a kind of periphery precompressed pad comprises shim body 1; Pad outer ring 12 makes thickness thinner through post forming, makes said pad inner ring 11 thickness greater than pad outer ring 12, and said a kind of periphery precompressed pad is when installing and using; Working surface is contact pins inner ring 11 only; Reduce lifting surface area, reduced mounting torque, made things convenient for the workman to install.

Referring to Fig. 4, during installation, earlier two flanges 6 are merged to together; To at least two the eyelet inserting bolts 3 in flange 6 belows, it is middle then said a kind of periphery precompressed pad to be put into two flanges 6, as long as the outer side surface of said pad outer ring 12 just in time nestles up the double-screw bolt 4 of these two bolts 3; So just accomplished a kind of location of periphery precompressed pad; To remaining flange 6 eyelet inserting bolt 3, tighten fixing the completion with nut 5 again and install then, easy for installation; Need not be with pad that estimate to confirm the band outer shroud whether in the central authorities of flange 6, can whether contact as the basis for estimation of whether accurately locating according to double-screw bolt 4 and 12 sides, pad outer ring.

Claims (1)

1. periphery precompressed pad; Comprise shim body (1); It is characterized in that: said shim body (1) comprises pad inner ring (11) and pad outer ring (12); Said pad inner ring (11) thickness is greater than the thickness of pad outer ring (12), and the outer side surface of said pad outer ring (12) contacts with double-screw bolt (4) part that flange (6) is gone up bolt (3).

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