CN201284893Y - Self-sealing fast joint - Google Patents

Abstract

The utility model relates to a self-sealing rapid connector, which comprises a female connector [7] and a male connector [5]. The female connector and the male connector are respectively provided with a one-way valve, a propping component [10, 51] which is used for propping a valve core [9, 6] of the other connector; the valve cores of the one-way valves in the female connector and the male connector adopt the cylindrical surface as the sealing surface; and the sections of the propping component of one connector is identical with the section of the valve core of the other connector. Because the valve cores with the cylindrical surfaces are used in the self-sealing rapid connector, when the female connector and the male connector are butted, the propping component of one connector can prop the valve core of the other connector with the identical section, and then the cylindrical surfaces and the valve seats can form the sealing continuously. Compared with the prior art, when the self-sealing rapid connector is used, the amount of the mixed air and the amount of the medium leakage are both small, thereby realizing the pressure connection and disconnection of the female connector and the male connector.

Description

Self sealing rapid pipe joint

Technical field

The utility model relates to a kind of self sealing rapid pipe joint, especially adopt the rapid pipe joint of yin-yang structure.

Background technique

Be in the pipe-line system of medium with oil, gas, water etc., self sealing rapid pipe joint is through being commonly used to realize the quick disconnection or the connection of pipeline, and wherein the most commonly used is the negative and positive rapid pipe joints.Negative and positive rapid pipe joint is made of negative joint and male connector, by the purpose that is used for reaching the joint break-make between the one-way valve that pushes part and another joint (constituting) of a joint by band spring spool and valve seat, promptly be to open the one-way valve of another joint pipeline is connected, lose after the power of pushing by spring by one-way valve and prevent that medium leaks in the pipeline with the part that pushes of this joint.Push part during negative and positive rapid pipe joint butt joint valve core spring is compressed and conducting, spring ejects spool and seals leaking of medium during disengagement.The one-way valve spool of male and female connector commonly used is a cone structure, and the spool of its cone-shape does not have part to expose the fittings body outside to be close to sealing with conical surface valve seat when docking.This just has a defective, the exposed parts spool will be pressed into earlier before promptly the two ends fittings body docks fully when butt joint, and the upstream extremity medium leaks, air is sneaked into downstream and make.Equally, the two ends fittings body unclamps and taper valve core not before safety and the valve seat sealing when disconnecting, and also has the phenomenon generation that the upstream extremity medium leaks, air is sneaked into downstream.

In addition, the self sealing rapid pipe joint that has Chinese utility model patent ZL200520067815.8 " body self-sealing joint " to be introduced again, have only the final position to end though the valve core that does not expose, the valve that also belongs to inclined-plane sealing still exist, medium is leaked and defective that air is sneaked into.

The defective of easy leakage and entrained air when in a word, there is the joint operation in self sealing rapid pipe joint in the past.

Summary of the invention

At above-mentioned defective, all few self sealing rapid pipe joint of the leakage rate of the mixed volume of air, medium when the utility model provides a kind of the operation.

Self sealing rapid pipe joint of the present utility model, comprise negative joint and male connector, one-way valve and the part that pushes that pushes the other side's joint spool are respectively arranged in negative joint and the male connector, the spool of the one-way valve in described negative joint and the male connector is sealing surface with the cylndrical surface, and it is identical with the cross section of the other side's joint spool to push part.

Self sealing rapid pipe joint of the present utility model makes male and female connector push part with the spool jacking of same cross section with the other side when butt joint owing to adopted the cylndrical surface sealed valve core, promptly all has cylinder to seal mutually with valve seat from start to finish.Compared with prior art, the utility model the time makes the leakage rate of the mixed volume of air and medium all minimum in operation, thereby the band that can realize male and female connector is pressed and connected and throw off.

Self sealing rapid pipe joint of the present utility model, male connector has the male connector body, the male connector body stretches out the part that pushes that outer wall is the cylndrical surface forward, pushing the part leading portion, cylindrical hole is arranged is valve seat, the male connector body is built-in with coaxial male connector inner core, male connector inner core leading portion is that a cylindrical body is a spool, there is Returnning spring male connector inner core rear end, have on the male connector inner core end face forward the location convex shoulder and end face location convex shoulder is backward arranged on the male connector body, the spool front end flushed with male connector body front-end face when two convex shoulders offseted;

Negative joint has the negative joint body, it is the outer seat sealing surface that negative joint body leading portion has cylindrical hole, also has a coaxial fixedly inner core in the negative joint body, fixedly the inner core leading portion is that a cylindrical body is for pushing part, its outer wall is interior sealing surface of seat, fixedly the inner core front end flushes with negative joint body front-end face, the negative joint body is built-in with movable sheath, the movable sheath leading portion is the ring type spool, the inside and outside wall of ring type spool is respectively column sealed corresponding with inside and outside sealing surface of seat, there is Returnning spring the movable sheath rear end, have on the movable sheath end face forward the location convex shoulder and end face location convex shoulder is backward arranged in the negative joint body, two location convex shoulders make ring type spool front end flush with negative joint body front-end face when offseting;

The external diameter that pushes ring type spool on part leading portion external diameter and the negative joint on the male connector is identical, and it is identical with the external diameter of male connector upper valve core to push the part external diameter on the negative joint.

The direction that above-mentioned fore-and-aft direction points to square joint when docking with each joint is the place ahead.

Description of drawings

1 is the self sealing rapid pipe joint of the present utility model axial sectional view of male connector when throwing off, among the figure: the 1-jointing, 2-hole back-up ring, the 3-spring seat, 4 springs, 5-male connector body, that draws on the 51-male connector body pushes part, 6-activity inner core;

Fig. 2 is the self sealing rapid pipe joint of the present utility model axial sectional view of negative joint when throwing off, among the figure: 7-negative joint body, the 8-spring, the 9-movable sheath, 10-is inner core fixedly, 11-hole back-up ring;

Fig. 3 is the axial sectional view of the coupled condition of self sealing rapid pipe joint of the present utility model, 1-jointing wherein, 2-hole back-up ring, the 3-spring seat, 4 springs, 5-male connector body, that draws on the 51-male connector body pushes part, the movable inner core of 6-, 7-negative joint body, 8-spring, 9-movable sheath, 10-is inner core fixedly, 11-hole back-up ring.

Embodiment

As shown in Figure 1, the male connector structure of this routine self sealing rapid pipe joint is: comprise major parts such as jointing 1, hole back-up ring 2, spring seat 3, spring 4, male connector body 5, male connector spool 6.Male connector body rear end and jointing are to be threaded and with seal with O ring, jointing is female pipe joint.Male connector body interior cylindrical chamber is built-in with coaxial movable inner core 6, movable inner core back segment reduced also is with Returnning spring thereon, has a hole to determine this spring rear end position with back-up ring and place between spring rear end and the back-up ring front end to accept spring with spring seat in the male connector body.Movable inner core leading portion is that a cylindrical body is a spool, and cylinder is a sealing surface, and O shape circle is installed.The male connector body has drawn a cylinder that constitutes with the coaxial circles cylinder forward, and this cylinder is be that sealing surface cooperates with aforementioned spool to be valve for pushing part, pushing part inner cylinder leading portion, the back segment enlarged-diameter.This activity inner core back segment is that hollow sleeve (being with spring section) leading portion is entity (a spool part), and retreading at valve core sealed cover has through hole connection back segment endoporus down backward.At movable inner core middle part one end face convex shoulder is forward arranged, end face convex shoulder is backward arranged in the male connector body, flush when spring pushes the part front-end face on spool front-end face and the male connector body with movable inner core when sinciput offsets two convex shoulders.

As shown in Figure 2, the negative joint structure of this routine self sealing rapid pipe joint is: comprise negative joint body 7, and spring 8, movable sheath 9, fixedly inner core 10, hole back-up ring 11 major parts such as grade.Negative joint body back segment has externally threaded pipe joint, it is built-in with coaxial fixedly inner core, fixedly inner core has step and step cylindrical to cooperate with negative joint body endoporus and is located with back-up ring by convex shoulder and hole on the negative joint body endoporus in the rear end, so that its front-end face is concordant with negative joint body front-end face.Negative joint body leading portion endoporus is that cylindrical hole and its inner hole wall are the outer seat sealing surfaces, the O RunddichtringO is installed on the outer seat sealing surface, and fixedly the leading portion of inner core is that its cylinder of a cylindrical body is interior sealing surface of seat, and the O RunddichtringO also is installed on the interior sealing surface of seat.Have a movable sheath to be installed within the negative joint body fixedly outside the inner core, be with spring on movable sheath back segment reduced and its, spring rear end is pressed on the step of fixing inner core.The movable sheath leading portion is that the cylinder that constitutes with two coaxial cylndrical surface is a spool, and the interior outer cylinder of spool is that sealing surface cooperates with inside and outside sealing surface of seat respectively.The interior boring ratio leading portion of movable sheath back segment (being with spring section) (spool part) is big, fixedly inner core back segment reduced and the passage that time is communicated with negative joint body mesopore is backward arranged tiltedly.End face convex shoulder is forward arranged on the movable sheath, end face convex shoulder is backward arranged on the negative joint body, the movable sheath front-end face flushes with negative joint body front-end face when spring offsets two convex shoulders to sinciput movable sheath.

Structure when this routine self sealing rapid pipe joint connects as shown in Figure 3, under the effect of external force, negative and positive two joints are docked, male connector body 5 push part because of external diameter in it with movable sheath 9 upper valve cores of negative joint body 7 in consistent the making of external diameter push part and promote movable sheath activity compression cover rear spring 8 and inwardly slide, push part on the male connector body and insert the former movable sheath of negative joint position.Simultaneously, push part because of the movable inner core 6 upper valve core external diameters consistent promotion activity inner core activity compression inner core rear spring 4 inwardly slips of its external diameter with the male connector body on the fixedly inner core 10 in the negative joint body, the negative joint body fixedly pushes part on the inner core and then inserts the former movable inner core of male connector position.Push part and spool on the male and female connector body push when inserting mutually, the end face that is subjected to the effect of spring that two spools and two are pushed between the part separately is close to, and the outer cylinder that the male connector body pushes part becomes valve core sealed cover and the external sealing surface of seat fitted seal of negative joint to prevent that medium from leaking.After the butt joint, medium via pipe joint 1 mesopore, movable inner core back segment mesopore and slanted channel thereof, male connector body push the back segment necking section of hole enlargement place in the part, negative joint body internal fixation inner core and access ramp, negative joint body rear end mesopore forms the passage that connects.When the external force that connects disappears, act on when being subjected in the male and female connector body two springs, the movable sheath in the negative joint body is returned to the state when throwing off, and the movable inner core in the male connector body also returns to the state of disengagement.When throwing off, be cylinder equally, and push part, the valve of two joints is cut off from start to finish for spool to valve in the square joint because of one-way valve.

Self sealing rapid pipe joint of the present utility model because the butt joint end face all is close to, does not have so leakage and air are sneaked on the theory when connecting or throw off, and the mixed volume of the leakage rate of medium and air is much smaller than prior art during actual the use.

Claims (2)

1, a kind of self sealing rapid pipe joint, comprise negative joint and male connector, one-way valve and the part that pushes that pushes the other side's joint spool are respectively arranged in negative joint and the male connector, the spool that it is characterized in that the one-way valve in described negative joint and the male connector is sealing surface with the cylndrical surface, and it is identical with the cross section of the other side's joint spool to push part.

2, self sealing rapid pipe joint as claimed in claim 1 is characterized in that

Male connector has the male connector body, the male connector body stretches out the part that pushes that outer wall is the cylndrical surface forward, pushing the part leading portion, cylindrical hole is arranged is valve seat, the male connector body is built-in with coaxial male connector inner core, male connector inner core leading portion is that a cylindrical body is a spool, there is Returnning spring male connector inner core rear end, have on the male connector inner core end face forward the location convex shoulder and end face location convex shoulder is backward arranged on the male connector body, the spool front end flushed with male connector body front-end face when two convex shoulders offseted;

Negative joint has the negative joint body, it is the outer seat sealing surface that negative joint body leading portion has cylindrical hole, also has a coaxial fixedly inner core in the negative joint body, fixedly the inner core leading portion is that a cylindrical body is for pushing part, its outer wall is interior sealing surface of seat, fixedly the inner core front end flushes with negative joint body front-end face, the negative joint body is built-in with movable sheath, the movable sheath leading portion is the ring type spool, the inside and outside wall of ring type spool is respectively column sealed corresponding with inside and outside sealing surface of seat, there is Returnning spring the movable sheath rear end, have on the movable sheath end face forward the location convex shoulder and end face location convex shoulder is backward arranged in the negative joint body, two location convex shoulders make ring type spool front end flush with negative joint body front-end face when offseting;

The external diameter that pushes ring type spool on part leading portion external diameter and the negative joint on the male connector is identical, and it is identical with the external diameter of male connector upper valve core to push the part external diameter on the negative joint.

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