CN2336153Y - Straight oil sealed ball valve - Google Patents

Abstract

The utility model relates to a straight oil sealed ball valve. A ball core is arranged in the cavity of a valve body. The contact inner ball surface of a left sealing ring and the ball core and the contact inner ball surface of the right sealing ring and the ball core are provided with radial internally concave ring grooves, the interior of the ring groove is provided with axial groove with equal circumference, and the axial groove is communicated with the excircle of the sealing ring by a plurality of radical holes; the radial groove is communicated with the end face of the sealing ring facing the ball core and is connected with the inner cavity of the valve body; oil filling holes on the valve body are communicated with the inner cavity of the valve body, sealed oil and fat is filled from the oil filling holes, and the oil filling holes are sealed by oil filling plugs. The utility model reduces the extrusion and the deformation of the left sealing ring and the right sealing ring, reduces abrasion, and prolongs the service life of the sealing ring and the ball core; the utility model is labour-saving in operation.

Description

Wafer type oil seal ball valve

The utility model relates to Fluid valve, and concrete is a kind of wafer type oil seal ball valve.

In worker, agricultural production and sphere of life, fluid-duct-system be unable to do without and uses shutoff valve, and in various shutoff valves, ball valve is simple in structure with it, easy to use, and be widely used, original wafer type ball valve is to realize axial seal by the extrusion-deformation between ball core and the seal ring, because this distortion belongs to rigid deformation, keying moment when this just makes operation becomes big, operating difficulties, ring wear is big, and working life is short.

The utility model purpose is to overcome above-mentioned deficiency, and a kind of improved wafer type oil seal ball valve is provided, and the extrusion-deformation of seal ring is reduced, rapid operation, and wearing and tearing reduce, and increase the service life.

The purpose of this utility model is such realization:

A kind of wafer type oil seal ball valve; Mainly be made of valve body, ball core, valve rod, seal ring, gland, have the ball core of through hole to be loaded on body cavity, realize axial seal by left and right seal ring between itself and manhole appendix, the keying with the valve rod control channel that handgrip is housed is characterized in that:

On left and right seal ring and inner ball surface that the ball core contacts, be shaped on interior concave ring groove radially, axial groove on some radial hole communication seals circle cylindricals of circumference in equal parts is arranged in this annular groove, the end face towards the ball core of this axial groove communication seals circle, and communicate with body cavity;

Oil hole connecting valve intracoelomic cavity is arranged on the valve body, inwardly be filled into seal grease from oil hole, this oil hole seals with oil filler plug.

The utility model has following actively useful effect:

This wafer type oil seal valve has adopted the seal ring of novel uniqueness, has offered oil transportation hole oil storage tank on this seal ring, injects seal gease by oil hole, and these seal geases have formed one deck oil film by oil transportation hole and oil storage tank in valve body and between the seal ring.So axial seal realizes by extrusion-deformation no longer merely, but realize jointly by extrusion-deformation and oil film seal, so extrusion-deformation just reduces relatively, reduce thereby produce the required moment of this distortion, keying moment when making operation significantly reduces rapid operation.This oil film also makes the friction between ball core and the seal ring reduce greatly simultaneously, has improved the working life of ball core.

This novel wafer type oil seal ball valve can be applicable to all spectra of original wafer type ball valve, and can be used in the more strict system of other sealing requirements.It has advantages such as volume is little, delicate structure, rapid operation, good airproof performance, is the very strong novel product of a kind of practicability.

Now in conjunction with the accompanying drawings with preferred embodiment:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the detail of construction of right seal ring among Fig. 1;

Fig. 3 is that the A of Fig. 2 is to view;

Wafer type oil seal ball valve of the present utility model; Mainly constitute by valve body 1, ball core 2, valve rod 3, seal ring 4,5, gland 6, there is the ball core 2 of through hole to be loaded on the inner chamber of valve body 1, realize axial seals by left and right seal ring 4,5 between itself and manhole appendix, keying with valve rod 3 control channels that handgrip 7 is housed, " O " RunddichtringO is housed between the fitting surface of valve rod 3 and valve body 1, at gland 6 " O " RunddichtringO with the front end dress of the screw-thread fit face of valve body 1, its structure please refer to Fig. 1 Fig. 2 Fig. 3:

Interior concave ring groove 8 is radially arranged on left and right seal ring and inner ball surface that the ball core contacts, axial groove 10 on some radial holes 9 communication seals circle cylindricals of circumference in equal parts is arranged in this annular groove, the end face towards the ball core of these axial groove 10 communication seals circles, and communicate with body cavity;

Oil hole 11 connecting valve intracoelomic cavities are arranged on the valve body, inwardly be filled into seal grease from oil hole, this oil hole is at ordinary times with oil filler plug 12 sealings.

In preferred embodiment, described seal ring 4,5 usefulness teflon are made.

Claims (1)

1. wafer type oil seal ball valve; Mainly be made of valve body, ball core, valve rod, seal ring, gland, have the ball core of through hole to be loaded on body cavity, realize axial seal by left and right seal ring between itself and manhole appendix, the keying with the valve rod control channel that handgrip is housed is characterized in that:

On left and right seal ring and inner ball surface that the ball core contacts, be shaped on interior concave ring groove radially, axial groove on some radial hole communication seals circle cylindricals of circumference in equal parts is arranged in this annular groove, the end face towards the ball core of this axial groove communication seals circle, and communicate with body cavity;

Oil hole connecting valve intracoelomic cavity is arranged on the valve body, inwardly be filled into seal grease from oil hole, this oil hole seals with oil filler plug.

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