CN206145321U - Tandem type combination sealing element - Google Patents

Abstract

Present high pressure oil seal can directly become violent impact to O type cast when high -pressure fluid process, can enclose the O type even and directly wash out, because of lacking sealing up of O type circle, directly results in fluid to leak when sealed position is got back to to the dabber. A tandem type combination sealing element, includes quick -operation joint casing, seal, dabber, dabber cavity, netted wall, and its characteristics lie in that quick -operation joint casing afterbody is equipped with the step, and the step outside is equipped with connecting thread, and the step below is equipped with the seal, is equipped with compression spring between seal and casing, the seal is inboard, quick -operation joint casing center fixedly connected with dabber, and the seal covers in the dabber outside, the inside cavity structure that is of dabber. This technical scheme's superior, the sealed effect of comprehensive sealing performance is obvious, tight, the no fluid dripping phenomenon of hydraulic pressure ready -packaged joint static sealing, and it is anticipated to reach the design completely, gains gratifying result.

Description

A kind of tandem type combination seal

Technical field

This utility model is related to liquefied gass transport field, especially a kind of tandem type combination seal.

Background technology

At present, sealing ring is the conventional sealing means of hydro-pneumatic field, and existing single seal form is more and more not yet The requirement of modern machines equipment is adapted to, and needs to research and develop a kind of new sealing means modern machines equipment to be adapted to sealing Require, to improve its sealing and reliability.

During working condition, seal is subject to ready-packaged joint " female end " axial thrust and slides inwards, exposes mandrel and core 4 oil leak holes for interpenetrating on axle, high-voltage oil liquid is in mandrel cavity by 4 oil leak holes for interpenetrating on mandrel, height Speed injection ready-packaged joint housing, now high-voltage oil liquid can directly to O-ring formation severe impact, and O-ring lacks protection, or even meeting O-ring is directly washed out, when mandrel returns to sealing station because lacking the sealing of O-ring, oil liquid leakage is directly resulted in, so as to lead Cause O-ring seal failure in resting state.

The content of the invention

For the problems referred to above, this utility model provides a kind of tandem type combination seal, can bear hydraulic oil well The impact of stream, so as to effectively prevent sealing member because impact causes situation about coming off to occur, realizes static sealing well Energy.For achieving the above object, this utility model is designed with following manner is carried out：

A kind of tandem type combination seal, including snap joint housing, seal, mandrel, mandrel cavity, netted wall, its Feature is that snap joint housing afterbody is provided with step, and the screw thread of connection oil pipeline is provided with outside step；Snap joint housing Inwall is provided with seal, on the inside of seal, snap joint casing center be fixedly connected with the junction of mandrel, seal and mandrel It is provided with back-moving spring, back-moving spring center is provided with the lead column for preventing displacement, the sliding cavity that back-moving spring is placed on the inside of seal, Sliding cavity bottom is fixed in back-moving spring bottom, and back-moving spring top passes through cross bar connecting mandrel top；

It is cavity structure inside mandrel, on the side wall of mandrel cavity, is radially provided with 4 netted walls for interpenetrating, netted wall Medial surface be arc, be provided between the netted wall of relative arc ellipse sealing globe valve, seal globe valve both sides arc top It coincide with the inner arc of netted wall；

Mandrel front end outer side shoulder is provided with rectangular seal groove, and O-ring, the rectangle of opposite side are provided with rectangular seal groove Interface channel is provided between sealed groove, the resilient binding yarn of connection O-ring in interface channel, is provided with, the two ends of binding yarn are fixed on O-ring, is provided with fixed arm at the upper and lower arc top of O-ring, binding yarn end hooking is in fixed arm.

Preferably, the O-ring and netted wall are shifted to install.

Preferably, the binding yarn can be the fix bar of regular length.

Preferably, the binding yarn can be the pull bar of adjustable in length.

Preferably, O-ring of the O-ring for NBR materials.

Preferably, the diameter with diameter greater than interface channel of the O-ring.

Preferably, diameter and not less than mandrel the internal diameter of the length of the binding yarn and two O-rings.

Preferably, O-ring is fixed by hemispheric ferrule in the binding yarn end.

Preferably, the binding yarn is fixed on O-ring by spherical reticulated by its end.

During resting state, high-voltage oil liquid be sealed in it is immobilising in mandrel cavity.

The beneficial effects of the utility model are：Compared with prior art, tandem type combination seal is bearing hydraulic oil height During pressure high speed impact, one carrys out O-ring is hidden in inside groove, and two to be connected with binding yarn, binding yarn connection between the O type circles of opposite side The O-ring of opposite side, O-ring can bear the impact of high-pressure oil flow well, so as to effectively prevent sealing member because impact is led The situation that cause comes off occurs, and realizes static sealing performance, the comprehensive sealing superior performance of the technology scheme, sealing well Substantially, hydraulic pressure ready-packaged joint static sealing is tight, leak phenomenon without oil drops, is fully achieved expected design, and acquirement makes us full for effect The result of meaning.

Description of the drawings

Fig. 1 is cross-sectional view of the present utility model；

Labelling in figure：1- snap joint housings；2- seals；3- mandrels；The netted walls of 4-；5-O type circles；

6- interface channels；7- binding yarns；8- spherical sealed valves.

Specific embodiment

Embodiment 1：

As shown in drawings, be this invention standstill seal state, O type circles（NBR materials）It is hidden in groove, O types Good sealing property is played in circle nature expansion；

During use, seal is subject to ready-packaged joint " female end " axial thrust and slides inwards, and on mandrel and mandrel, 4 mutually The netted wall for connecting exposes, and high-voltage oil liquid by netted wall, injects at a high speed ready-packaged joint housing in mandrel cavity.Now, High-voltage high-speed impacts, but because O-ring is wrapped in inside bracing ring, binding yarn is connected between the O type circles of opposite side, and binding yarn connects The O-ring of opposite side is connect, O-ring can bear the impact of high-pressure oil flow well, so that sealing member is effectively prevent because of impact Situation about coming off is caused to occur.

After terminating, i.e., high-pressure oil flow halted state when, seal loses the oil flow pressure at ready-packaged joint " female end ", The spherical seal compressed by the reset of suction function and back-moving spring resets, and blocks netted wall and keeps sealing；While by Diminish in pressure, O-ring volume becomes pushes L-type support seal to seal greatly, plays sealing function.

Claims (9)

1. a kind of tandem type combination seal, including snap joint housing, seal, mandrel, mandrel cavity, netted wall, which is special Point is that snap joint housing afterbody is provided with step, and the screw thread of connection oil pipeline is provided with outside step；In snap joint housing Wall is provided with seal, and on the inside of seal, snap joint casing center is fixedly connected with the junction of mandrel, seal and mandrel and sets There is back-moving spring, back-moving spring center is provided with the lead column for preventing displacement, and the sliding cavity that back-moving spring is placed on the inside of seal is multiple Position spring bottom end is fixed on sliding cavity bottom, and back-moving spring top passes through cross bar connecting mandrel top；Tie for cavity inside mandrel Structure, is radially provided with 4 netted walls for interpenetrating on the side wall of mandrel cavity, the medial surface of netted wall is arc, relative arc The sealing globe valve of ellipse is provided between the netted wall of shape, the inner arc on the both sides arc top and netted wall that seal globe valve coincide；Mandrel Front end outer side shoulder is provided with rectangular seal groove, is provided with O-ring, sets between the rectangular seal groove of opposite side in rectangular seal groove There is interface channel, in interface channel, be provided with the resilient binding yarn of connection O-ring, O-ring, O-ring are fixed in the two ends of binding yarn Fixed arm is provided with upper and lower arc top, binding yarn end hooking is in fixed arm.

2. a kind of tandem type combination seal according to claim 1, it is characterised in that the O-ring and netted wall are wrong Position is arranged.

3. a kind of tandem type combination seal according to claim 1, it is characterised in that the binding yarn can be regular length Fix bar.

4. a kind of tandem type combination seal according to claim 1, it is characterised in that the binding yarn can be adjustable length The pull bar of section.

5. a kind of tandem type combination seal according to claim 1, it is characterised in that the O-ring is NBR materials O-ring.

6. a kind of tandem type combination seal according to claim 1, it is characterised in that the O-ring with diameter greater than The diameter of interface channel.

7. a kind of tandem type combination seal according to claim 1, it is characterised in that the length of the binding yarn with two Diameter and not less than mandrel the internal diameter of O-ring.

8. a kind of tandem type combination seal according to claim 1, it is characterised in that the binding yarn end passes through hemisphere O-ring is fixed in the ferrule of shape.

9. a kind of tandem type combination seal according to claim 1, it is characterised in that the binding yarn is logical by its end Cross spherical reticulated and be fixed on O-ring.