CN101270842A

CN101270842A - Self-sealing joint

Info

Publication number: CN101270842A
Application number: CNA200810061340XA
Authority: CN
Inventors: 王重杰
Original assignee: NINGBO ZHONGDI MACHINERY CO Ltd
Current assignee: NINGBO ZHONGDI MACHINERY CO Ltd
Priority date: 2008-04-23
Filing date: 2008-04-23
Publication date: 2008-09-24
Anticipated expiration: 2028-04-23
Also published as: CN100538145C

Abstract

The invention discloses a self-sealing joint. The invention comprises a joint body (1) which is provided with a sealing surface (8) of the joint body; a sealing valve core (2), a limiting shield ring (5), a spring seat (4) and a reset spring (3) of a metal limiting scapular (7) which are applied in combination with the sealing surface (8) of the joint body are mounted at the middle part along the axial direction; a ring shaped inclined plane (14) is mounted at the top part of the metal limiting scapular (7); both the angle (Alpha) between the ring shaped inclined plane (14) and the axis of the sealing valve core (2) and the angle (Beta) between the sealing surface (8) of the joint body and the axis of the joint body (1) can be 44 degrees to 46 degrees; the top part of a sealing ring (9) is an inclined plane (15); the sealing ring (9) is embedded at the lower part of a metal limiting scapular (2); the angle (Gamma) between the inclined plane (15) and the axis of the sealing valve core (2) can be 59 degrees to 61 degrees when the sealing ring (9) is in a natural state. The invention has no sealing space and the sealing valve core is protected from abrasion.

Description

Self-sealing joint

Technical field:

The present invention relates to a kind of online Quick Connect Kit that is used for the hydrodynamic pressure control system, specifically is a kind of self-sealing joint.

Background technique:

The hydrodynamic pressure control system is made up of parts such as pipeline, instrument, joint and valve bodies basically, and the replacing of the maintenance of this system and instrument needs the closing pressure source side to carry out usually, thereby has brought great inconvenience for the loading and unloading and the maintenance of instrument or valve body.For being had in system under the working state of pressure source, the staff can carry out the loading and unloading and the maintenance of instrument or valve body easily to it, at present, there are two kinds of dissimilar self-sealing joints in prior art, wherein, one type to seal type for lid be that sealed valve core (packed-piston) and fittings body sealing surface in the fittings body is soft contact the between two planes; And the hard contact that is the pin type of another kind of type to be closed hole in cone seal spool and the fittings body stop up, its seal form is the potted line of a ring-type, this self-sealing joint of two types all also is provided with a vertical Returnning spring between sealed valve core and fittings body, thereby make self-sealing joint when not being connected, be in tight the contact or blocked state because of the elastic force effect that is subjected to Returnning spring makes sealed valve core and sealing surface or closed hole with instrument or valve body, and when being subjected to external force such as instrument or valve body when sealed valve core and influencing, sealed valve core leaves sealing surface or closed hole and makes the joint conducting.

Though can making the staff have in system under the working state of pressure source, above-mentioned two types self-sealing joint can carry out the loading and unloading and the maintenance of instrument or valve body easily to it, but all there is following defective in they: 1, because these two types of self-sealing joints all do not carry out interference extruding protection to sealed valve core, therefore at sealed valve core with the sealing anchor ring or seal in frequent contact of nose end, cause the sealed valve core wearing and tearing easily, thereby make self-sealing joint seal clearance occur; 2, because there is the error of perpendicularity after installing in Returnning spring, so the power of action of reset spring on sealed valve core is not uniform, and this makes that the wearing and tearing of sealing surface neither be uniform, thereby causes sealed valve core to tilt naturally easily and form seal clearance.

Summary of the invention:

The technical problem to be solved in the present invention is to provide a kind of sealed valve core can not wear and tear and not have the self-sealing joint of seal clearance.

Technical solution of the present invention is that a kind of self-sealing joint with following structure is provided: it comprises fittings body and is positioned at the sealed valve core of fittings body, Returnning spring, is provided with for liquid the spring seat and the spacing back-up ring of the through hole of circulation; Described spacing back-up ring is placed on the groove of fittings body inwall; Described spring seat is connected spacing back-up ring top; The guide rod of described sealed valve core and spring seat center hole are slidingly matched; The top of described Returnning spring withstands on the middle part of sealed valve core, and the bottom of described Returnning spring withstands on the spring seat; Be provided with the fittings body sealing surface in the described fittings body; Angle between described fittings body sealing surface and the fittings body axis can be 44 °～46 °; Described sealed valve core axially middle part is provided with the spacing omoplate of the metal that is used with the fittings body sealing surface; The spacing omoplate of described metal top is an annular slope; Angle between described annular slope and the sealed valve core axis can be 44 °～46 °; The spacing omoplate of described metal bottom is embedded with seal ring; Described seal ring top is an inclined-plane; Described inclined-plane when seal ring is nature and the angle between the sealed valve core axis can be 59 °～61 °.

After adopting above structure, compared with prior art, the present invention has the following advantages:

1; because inclined-plane described in the present invention is when seal ring is nature and the angle between the sealed valve core axis angle between annular slope and the sealed valve core axis and the angle between fittings body sealing surface and the fittings body axis on the spacing omoplate of metal; when therefore sealed valve core compresses with fittings body under external force; at first be that seal ring by the spacing omoplate of metal bottom contacts extruding with the fittings body sealing surface; effect by spacing omoplate of metal and fittings body sealing surface plays position-limiting action to sealed valve core and promptly sealed valve core is carried out interference extruding protection then; thereby the distortion that makes seal ring remains in the fixing deformation band; prevented that effectively sealed valve core from causing the wearing and tearing of sealed valve core with frequent contact of sealing nose end, avoided self-sealing joint seal clearance to occur.

2, the effect between spacing omoplate of metal and the fittings body sealing surface has not only been played interference extruding protective action to sealed valve core, and has guaranteed the perpendicularity of Returnning spring in fittings body, prevents that effectively sealed valve core from the nature inclination occurring and forming seal clearance.

As a kind of optimal way of the present invention, the angle between described annular slope and the sealed valve core axis can be 45 °; Angle between described fittings body sealing surface and the fittings body axis can be 45 °; Described inclined-plane under the seal ring nature and the angle between the sealed valve core axis can be 60 °.These three kinds of angles all are the best angles that obtain after the applicant's repetition test, adopt cooperatively interacting of these three kinds of angles, can make among the present invention the wear rate of sealed valve core almost nil, reach the effect of no seal clearance.

As a kind of improvement of the present invention, described seal ring is the EPT rubber packing ring.Ethylene propylene diene rubber is non-polar in essence, it not only has resistance to polar solvent and chemical substance, and water absorption rate is low, has the good insulation performance characteristic, the present invention adopts ethylene propylene diene rubber can better guarantee working life of sealed valve core as seal ring, prevents that seal ring is subjected to the corrosion of aqueous chemical material and the sealed valve core that finally weares and teares.

Description of drawings:

Fig. 1 is the structural representation of self-sealing joint of the present invention when not being in the seal operation state.

Fig. 2 is the structural representation of self sealing structure of the present invention when being in the seal operation state.

Fig. 3 is the structure for amplifying schematic representation of sealed valve core among the present invention.

Fig. 4 is the broken section structure enlarged diagram when sealed valve core adopts the guide head of another kind of shape and guide rod among the present invention.

Shown in the figure: 1, fittings body, 2, sealed valve core, 3, Returnning spring, 4, spring seat, 5, spacing back-up ring, 6, groove, 7, the spacing omoplate of metal, 8, fittings body sealing surface, 9, seal ring, 10, guide rod, 11, spill seal groove, 12, guide head, 13, through hole, 14, annular slope, 15, inclined-plane, angle between α, annular slope and the sealed valve core axis, the angle between β, fittings body sealing surface and the fittings body axis, γ, inclined-plane are under the seal ring nature and the angle between the sealed valve core axis.

Specific embodiment:

The invention will be further described below in conjunction with the drawings and specific embodiments:

As Fig. 1, Fig. 2 and shown in Figure 3, in this specific embodiment, self-sealing joint of the present invention comprises fittings body 1 and is positioned at the sealed valve core 2 of fittings body 1, Returnning spring 3, is provided with for liquid the spring seat 4 and the spacing back-up ring 5 of the through hole 13 of circulation; Described spacing back-up ring 5 is placed on the groove 6 of fittings body 1 inwall; Described fittings body 1 outer end face is provided with the spill seal groove 11 that can be used with the projection on the instrument connector (not shown); Described spring seat 4 is connected spacing back-up ring 5 tops; The guide rod 10 and spring seat 4 center holes of described sealed valve core 2 are slidingly matched; The top of described Returnning spring 3 withstands on the middle part of sealed valve core 2, and the bottom of described Returnning spring 3 withstands on the spring seat 4; Be provided with fittings body sealing surface 8 in the described fittings body 1; Angle β between described fittings body sealing surface 8 and fittings body 1 axis can be 44 °～46 °, and in this specific embodiment, the angle β between described fittings body sealing surface 8 and fittings body 1 axis is preferably 45 °.Sealed valve core 2 axially middle part is provided with the spacing omoplate 7 of the metal that is used with fittings body sealing surface 8; The spacing omoplate of described metal 7 tops are an annular slope 14; Angle α between described annular slope 14 and sealed valve core 2 axis can be 44 °～46 °, and in this specific embodiment, the angle α between described annular slope 14 and sealed valve core 2 axis also is preferably 45 °.The spacing omoplate of described metal 2 bottoms are embedded with seal ring 9; Described seal ring 9 is the EPT rubber packing ring; Described seal ring 9 tops are an inclined-plane 15; Described inclined-plane 15 when seal ring 9 is nature and the angle γ between sealed valve core 2 axis can be 59 °～61 °, in this specific embodiment, described inclined-plane 15 under seal ring 9 natures and the angle γ between sealed valve core 2 axis be preferably 60 °.Because the working principle of working principle of the present invention and self-sealing joint of the prior art is basic identical, so do not give unnecessary details at this.

The present invention is not limited to described in the foregoing description, be that angle α between described metal spacing omoplate 7 top annular inclined-planes 14 and sealed valve core 2 axis and the angle β between fittings body sealing surface 8 and fittings body 1 axis are not limited to 45 °, they also can be 44 ° or 46 °, as long as scope is between 44 ° and 46 °; The inclined-plane 15 at seal ring 9 tops under seal ring 9 natures and the angle γ between sealed valve core 2 axis also be not limited to 60 °, it also can be 59 ° or 61 °, as long as scope is between 59 ° and 61 °; In addition, the present invention does not need to adopt ethylene propylene diene rubber as seal ring 9, and it also can adopt the rubber of other types, and spill seal groove 11 also can be set on the end face of described fittings body 1; Also have; the present invention lays special stress on protecting is angle β between fittings body sealing surface 8 and fittings body 1 axis; be arranged on the axially spacing omoplate 7 of metal at middle part of described sealed valve core 2; the annular slope 14 at the spacing omoplate of described metal 7 tops; angle α between described annular slope 14 and sealed valve core 2 axis; when seal ring 9 and inclined-plane, seal ring 9 top 15 are nature and the angle γ between sealed valve core 2 axis; though and described sealed valve core 2 with and guide head 12 and guide rod 10 are the requisite technical characteristicss of the present invention; but their shape is not limited to Fig. 1; shape shown in Fig. 2 and Fig. 3; they also can adopt the shape of the sealed valve core 2 shown in Fig. 4, more than change all falling into protection scope of the present invention.

Claims

1, a kind of self-sealing joint, comprise fittings body (1) and be positioned at fittings body (1) sealed valve core (2), Returnning spring (3), be provided with for liquid the spring seat (4) and the spacing back-up ring (5) of the through hole (13) of circulation; Described spacing back-up ring (5) is placed on the groove (6) of fittings body (1) inwall; Described spring seat (4) is connected spacing back-up ring (5) top; The guide rod (10) of described sealed valve core (2) is slidingly matched with spring seat (4) center hole; The top of described Returnning spring (3) withstands on the middle part of sealed valve core (2), and the bottom of described Returnning spring (3) withstands on the spring seat (4); Be provided with fittings body sealing surface (8) in the described fittings body (1), it is characterized in that: the angle (β) between described fittings body sealing surface (8) and fittings body (1) axis is 44 °～46 °; Described sealed valve core (2) axially middle part is provided with the spacing omoplate of metal (7) that is used with fittings body sealing surface (8); The spacing omoplate of described metal (7) top is an annular slope (14); Angle (α) between described annular slope (14) and sealed valve core (2) axis is 44 °～46 °; The spacing omoplate of described metal (2) bottom is embedded with seal ring (9); Described seal ring (9) top is an inclined-plane (15); Described inclined-plane (15) seal ring (9) when being nature and the angle (γ) between sealed valve core (2) axis be 59 °～61 °.

2, self-sealing joint according to claim 1 is characterized in that: the angle (α) between described annular slope (14) and sealed valve core (2) axis is 45 °; Angle (β) between described fittings body sealing surface (8) and fittings body (1) axis is 45 °.

3, self-sealing joint according to claim 1 is characterized in that: described inclined-plane (15) under seal ring (9) nature and the angle (γ) between sealed valve core (2) axis be 60 °.

4, according to claim 1 or 3 described self-sealing joints, it is characterized in that: described seal ring (9) is the EPT rubber packing ring.