CN107152575B - Coaxial self-sealing joint - Google Patents
Coaxial self-sealing joint Download PDFInfo
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- CN107152575B CN107152575B CN201710493254.5A CN201710493254A CN107152575B CN 107152575 B CN107152575 B CN 107152575B CN 201710493254 A CN201710493254 A CN 201710493254A CN 107152575 B CN107152575 B CN 107152575B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L29/00—Joints with fluid cut-off means
- F16L29/04—Joints with fluid cut-off means with a cut-off device in each of the two pipe ends, the cut-off devices being automatically opened when the coupling is applied
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
- F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
- F16L19/0212—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member using specially adapted sealing means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
- F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
- F16L19/025—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the pipe ends having integral collars or flanges
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The invention provides a coaxial self-sealing joint, which is characterized in that: the pipeline connector comprises two straight-through type male and female connectors which are mutually inserted, wherein the male and female connectors are respectively connected with a pipeline; the male connector is provided with a section of convex connecting pipe, the female connector is provided with a sleeve corresponding to the connecting pipe, the inner diameter of the sleeve is slightly larger than the outer diameter of the connecting pipe, and the sleeve can be sleeved with the connecting pipe; a telescopic valve core is arranged in the male connector, and a fluid channel is arranged between the valve core and the male connector shell along the axial direction; the inner wall of the male connector shell is provided with a step facing away from the interface direction, the diameter of the valve core is larger than the inner diameter of the step of the shell, and the outer edge end of the valve core is sealed with the step through an elastic material; the sleeve and the adapter tube are sealed by elastic materials; and locking devices are arranged outside the male joint and the female joint. The invention adopts soft and hard double sealing, has good sealing effect and can bear the working conditions of high temperature and high pressure.
Description
Technical Field
The invention relates to the technical field of pipeline connecting parts, in particular to a coaxial self-sealing joint.
Background
The self-sealing joint is generally used for quick connection of pipelines, the two joints are butted when in use, and the minimum fluid overflow amount can be achieved in the connection and disassembly processes. The self-sealing joint is generally composed of a joint shell, a valve core, a spring and the like. In the prior art, corresponding to the sealing of two joints, a common method is to arrange a rubber ring at a port of a valve core, arrange an inclined plane structure in a shell, and press the valve core through a spring, so that the rubber ring on the end surface of the valve core is tightly pressed with an inclined plane in the shell, thereby achieving the sealing effect. When the two connectors are connected, the valve core is pushed back, and the rubber ring of the valve core is separated from the inclined plane in the shell, so that the fluid is conducted. However, this structure has a drawback: when the fluid pressure is very high, the force acting on the valve core of the joint is very high, so that the valve core cannot be opened, the connection is very difficult, and the operation is very inconvenient.
Chinese patent 201110410760.6 discloses a quick butt joint, which comprises male and female joints, a valve core, an elastic element, a choke plug, a sliding sleeve, a valve seat and other parts, the prior art can bear larger pressure in the pipeline, and the sealing effect is better, but the problem that the two joints are difficult to connect is still existed during butt joint.
Chinese patent 201120269034.2 discloses a fixed core joint, including valve body, valve seat, sliding sleeve, reset spring, etc., this prior art has improved the sealing performance of fixed core joint valve greatly, has solved the current poor problem of sealing performance of proclaiming oneself the joint, but this prior art's joint design also does not solve the difficult problem of putting through of two joints when pressure is too big.
Disclosure of Invention
The invention provides a coaxial self-sealing joint for overcoming the problem that the joint is difficult to communicate due to overlarge fluid pressure in the prior art.
The technical scheme of the invention is as follows: the utility model provides a joint is proclaimed oneself to coaxial-type which characterized in that: the pipeline joint comprises a straight-through type male joint and a straight-through type female joint which are mutually inserted, wherein the male joint and the female joint are respectively connected with a pipeline; the male connector is provided with a section of convex connecting pipe, the female connector is provided with a sleeve corresponding to the connecting pipe, the inner diameter of the sleeve is slightly larger than the outer diameter of the connecting pipe, and the sleeve can be sleeved with the connecting pipe; a telescopic movable valve core is arranged in the male connector, and a fluid channel is arranged between the valve core and the male connector shell along the axial direction; the inner wall of the male connector shell is provided with a step back to the direction of the interface, the diameter of the valve core is larger than the inner diameter of the step of the shell, and the outer edge end of the valve core is sealed with the step through an elastic material; the sleeve and the adapter tube are sealed by elastic materials; and locking devices are arranged outside the male joint and the female joint.
On the basis, a sealing sleeve is arranged in the male connector, a fluid channel is arranged between the outer wall of the sealing sleeve and the inner wall of the male connector shell, the sealing sleeve is provided with a concave cavity, an opening of the cavity faces the connecting pipe, and the sealing sleeve is fixedly connected with the male connector shell.
On the basis, the valve core is provided with a sunken cavity, and an opening of the cavity faces the sealing sleeve; the outer diameter of the valve core cavity is slightly smaller than the inner diameter of the seal sleeve cavity, and a seal ring is arranged in a gap between the outer wall of the valve core cavity and the inner wall of the seal sleeve cavity; a spring is arranged between the valve core cavity and the seal sleeve cavity; the bottom of the valve core cavity is also provided with a through hole, and one side of the bottom of the valve core, which is back to the cavity, is provided with a core handle.
On the basis, according to the technical scheme of the invention, when the male joint and the female joint are connected, fluid flows from the male joint to the female joint, flows along the axial direction in a channel outside the sealing sleeve wall of the male joint and the wall of the valve core cavity body, changes the flow direction at the outer edge end of the bottom of the valve core cavity body and flows along the radial direction, reaches the core handle of the valve core cavity body and then flows along the axial direction to enter the female joint.
On the basis, the elastic sealing material is rubber, and the sealing mode is that the rubber material is arranged on at least a step surface or the outer edge end of the valve core; the rubber material adopts a pouring mode.
On the basis, an annular sealing groove is arranged on the step surface, and a sealing gasket is nested in the sealing groove.
On the basis, at least the outer wall of the valve core cavity or the inner wall of the seal cover cavity is provided with an annular seal groove, and a seal ring is nested in the seal groove: namely, an annular sealing groove can be arranged on the outer wall of the valve core cavity, and a sealing ring is nested in the annular sealing groove; an annular sealing groove can be arranged on the inner wall of the sealing sleeve cavity, and a sealing ring is nested in the annular sealing groove; or simultaneously, the outer wall of the valve core cavity or the inner wall of the seal cover cavity is provided with an annular seal groove, and a seal ring is nested in the annular seal groove. Further, the sealing groove and the nested sealing ring are at least 1, and in order to achieve better sealing effect, multiple sealing, such as 2 and 3, can be arranged.
On the basis, as a preferable embodiment of the invention, the bottom surface at the outer edge end of the valve core is provided with a recessed area, and the edge of the bottom end is in a knife edge structure to form a sealing knife, and the sealing knife is tightly contacted with the sealing ring.
On the basis of the above-mentioned formula, the material can be used,
as an optional embodiment of the invention, the length of the female joint sleeve is greater than that of the male joint connecting pipe, an annular sealing groove is arranged on at least the inner wall of the female joint sleeve or the outer wall of the male joint connecting pipe, and a sealing ring is nested in the sealing groove: the sealing groove and the sealing ring can be arranged on the inner wall of the sleeve or the outer wall of the connecting pipe, 1 sealing is carried out on each sealing ring groove, and multiple sealing can be arranged for enhancing the sealing effect.
As another optional embodiment of the invention, the inner wall of the female joint sleeve is provided with a step facing the direction of the interface, the length from the step to the sleeve port is less than the length of the male joint connecting pipe, the inner diameter of the step is less than the inner diameter of the male joint connecting pipe, and the step surface is in close contact with the end surface of the connecting pipe; an elastic sealing material is arranged at least between the step surface and the contact surface of the connecting pipe or between the inner wall of the sleeve and the outer wall of the connecting pipe: namely, sealing materials, such as rubber gaskets, can be arranged on the step surface and the contact surface of the connecting pipe; a sealing groove and a sealing ring can be arranged between the inner wall of the sleeve and the outer wall of the connecting pipe, and a plurality of sealing rings can be arranged.
On the basis, the outer side of the bottom of the seal sleeve cavity is provided with a connecting column, the connecting column is fixedly connected with a shell of the joint through a pressing sleeve, the pressing sleeve is of a cross structure, four cross ends of the pressing sleeve are connected with the shell of the joint, a circular through hole is formed in the center of the cross, and the through hole is used for fixing the seal sleeve.
On the basis, the side wall of the sealing sleeve, which is close to the cavity port, is provided with a plurality of through holes, and the cavity port of the sealing sleeve and the step of the male connector cavity are sealed through elastic materials.
On the basis, the outer part of the joint of the male connector and the connecting pipe is provided with a step, and the step surface faces the direction of the pipe orifice and is contacted with the port surface of the female connector sleeve; at least a convex spherical ring structure is formed on the external step surface of the male connector or the port surface of the sleeve of the female connector, and the other end surface contacted with the spherical ring structure forms a ring groove structure matched with the spherical ring structure: a convex spherical ring structure can be formed on the external step surface of the male joint, and a matched annular groove structure is formed on the port surface of the sleeve of the female joint; or a raised spherical ring structure can be formed on the port surface of the sleeve of the female joint, and a matched ring groove structure can be formed on the external step surface of the male joint.
On the basis, the locking device can be a screw thread, namely, a locking lantern ring is arranged on the outer walls of the male connector and the female connector, a screw thread is arranged on the inner wall of the locking lantern ring, and the male connector and the female connector are locked through the screw thread; the quick-inserting type locking can also be realized through a ring groove on the inner wall of the locking lantern ring and an elastic steel ball ring on the joint; the male connector and the female connector can be respectively provided with a lock hook and a retaining ring, and the male connector and the female connector are locked in a lock hook mode.
On the basis, as another preferable embodiment of the invention, the female joint is internally provided with a valve core, a sealing sleeve, a spring and a pressing sleeve component which are reversely arranged and have the same internal structure and function as the male joint.
On the basis, the self-sealing joint is applied to the field of self-sealing valves, particularly applied to the field of inflation, and particularly applied to the field of SF6 gas sealing.
On the basis, the core handle is provided with three plate blades which are mutually distributed at an angle of 120 degrees, and the through hole is arranged at the bottom of the cavity of the valve core between every two plate blades.
Compared with the prior art, the invention has the beneficial effects that:
1) the coaxial self-sealing joint provided by the invention adopts soft and hard double sealing between the male joint and the female joint: the inner part adopts elastic material for soft sealing, and the outer end surface adopts hard sealing made of metal material. The sealing effect is good, the working temperature is-20-100 ℃, and the highest working pressure can reach 0-25 MPa. The leakage rate is less than 10 under the working pressure of 25MPa -7 mbar·L/s。
2) The coaxial self-sealing joint provided by the invention adopts the combined design of the valve core and the sealing sleeve, changes the pressure direction of fluid to the valve core, changes the axial section pressure of the fluid to the valve core into the radial pressure of the circumference of the side surface, has balanced axial stress of the valve body, does not need to consider the factors of shunt pressure and differential pressure, and can bear higher pressure.
Drawings
FIG. 1 is a schematic view of male and female coupling structures of the coaxial self-sealing coupling according to the present invention;
FIG. 2 is a schematic structural view of the coaxial self-sealing joint of the present invention after the male and female joints are connected;
FIG. 3 is a schematic view of the cartridge configuration of the present invention;
figure 4 is a schematic view of the construction of the sealing sleeve according to the invention;
fig. 5 is a schematic view of the press sleeve structure of the present invention.
Reference numbers in fig. 1: the device comprises a female joint 1, a female joint sleeve 11, a spherical ring structure 114, a male joint 2 and a locking device 3; the valve core sealing structure comprises a connecting pipe 21, a valve core 22, a sealing gasket 23, a sealing ring 24, a spring 25, a sealing sleeve 26, a pressing sleeve 27, a pressing ring 28, a valve core through hole 29, a core handle 210, a valve core knife edge 211, a sealing sleeve through hole 212, an annular groove 215 and an annular sealing groove 216 on the outer wall of the valve core.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
Example 1
As shown in fig. 1, a coaxial self-sealing joint comprises a straight-through type male joint 2 and a female joint 1 which are mutually inserted, wherein the male joint 2 and the female joint 1 are respectively connected with a pipeline; the male connector 2 is provided with a section of convex connecting pipe 21, the female connector is provided with a sleeve 11 which is correspondingly matched with the connecting pipe, the inner diameter of the sleeve 11 is slightly larger than the outer diameter of the connecting pipe 21, the sleeve and the connecting pipe can be sleeved, and the gap is 1-3 mm. The male connector 2 is internally provided with a telescopic movable valve core 22, and a fluid passage is formed between the valve core 22 and the male connector shell 2 along the axial direction, wherein the fluid passage is an annular passage formed by the outer wall of the valve core 22 and the inner wall of the shell of the male connector 2. The inner wall of the male connector shell is provided with a step back to the interface direction, and the step can be formed by a part of the thickness of the shell and can also be formed by outward bending of the shell. The male connector has an outer diameter at the step larger than the inner diameter of the adapter tube 21.
In order to realize the contact sealing between the valve core 22 and the step surface, the outer diameter of the valve core 22 is larger than the inner diameter of the step of the male joint shell, and the outer edge end of the valve core 22 is sealed with the step through an elastic material, the elastic material is rubber, and the rubber acts on the joint surface of the valve core and the step in two ways: one method is a pouring method, namely, rubber materials are poured on the step surface or the outer edge end of the valve core, and at least one surface is ensured to be poured with the rubber materials; alternatively, a groove may be provided in the step surface such that an annular groove is formed in the step surface inside the male connector, and then the annular seal 23 is nested in the groove.
In addition, a sealing sleeve 26 is arranged in the male connector, an annular fluid channel is formed between the outer wall of the sealing sleeve and the inner wall of the male connector shell, the sealing sleeve 26 is provided with a concave cavity, the opening of the cavity faces the connecting pipe 21, and the sealing sleeve 26 is fixedly connected with the shell of the male connector 2.
The valve core 22 also has a recessed cavity, an opening of the cavity faces the sealing sleeve 26, that is, the opening of the cavity of the valve core 22 and the opening of the sealing sleeve 26 are opposite, but the outer diameter of the cavity of the valve core is slightly smaller than the inner diameter of the cavity of the sealing sleeve to ensure that the valve core 22 can move in an axial direction in a telescopic manner in the cavity of the sealing sleeve 26, and the spring 25 connected between the two cavities is used for the telescopic movement of the valve core 22. In order to seal the two chambers and prevent fluid in the conduit from entering the interior of the valve cartridge, the gap between the outer wall of the chamber of the valve cartridge 22 and the inner wall of the chamber of the sealing sleeve 26 is sealed by an elastomeric sealing ring 24. The sealing mode is as follows: an annular sealing groove 216 is formed in the outer wall of the cavity of the valve core 22, and a sealing ring 24 is nested in the annular sealing groove; or an annular sealing groove is arranged on the inner wall of the cavity of the sealing sleeve 26, and a sealing ring is nested in the annular sealing groove. Of course, the outer wall of the valve core cavity or the inner wall of the sealing cover cavity can be provided with an annular sealing groove and a sealing ring at the same time, but at least one group of sealing groove and sealing ring is provided, and each group of sealing ring forms a sealing line. In order to achieve better sealing effect, a plurality of sealing lines, such as 2, 3, etc., may be provided.
In order to ensure the pressure balance between the inner part and the outer part of the two cavities of the valve core 22 and the sealing sleeve 26, the bottom of the cavity of the valve core 22 is also provided with a through hole 29, so that when the valve core 22 moves relative to the sealing sleeve 26, two fluids sealed in the two cavities can flow out through the through hole 29, and the balance of the internal pressure and the external pressure in the cavity of the valve core 22 is ensured, so that the fluids only need to overcome the elastic force of the spring 25 in the axial direction, and the factors of the shunt pressure and the differential pressure do not need to be considered. When the two joints are butted, even if the fluid pressure is larger, the valve core can be pushed away without large force, so that the fluid communication of the male joint and the female joint is realized.
In order to facilitate the valve core 22 to be pushed away easily when the two connectors are in butt joint, a core handle 210 is arranged on one side of the bottom of the valve core 22, which is opposite to the cavity, the center of the core handle 210 is a shaft, one end of the core handle is welded at the center of the outer side of the bottom of the cavity of the valve core 22, the other end of the core handle is welded with a top cap, and a plurality of through holes are formed in the top cap. Three plate blades 217 distributed at an angle of 120 degrees with each other are arranged on the central shaft of the core handle 210, one end of each plate blade 217 is welded on the outer side of the bottom of the cavity of the valve core 22, the other end of each plate blade 217 is welded on a top cap, the outer diameter of the top cap is smaller than the inner diameter of the connecting pipe 21, and a plurality of grids or through holes can be arranged on the top cap to facilitate fluid circulation. The three blades distributed at 120 degrees are used for strengthening the core handle, and a fluid channel is formed between every two adjacent blades, so that three fluid channels are distributed around the core handle 210. The through holes 29 at the bottom of the cavity of the valve core 22 are distributed to correspond to three fluid channels.
The shaft type self-sealing joint provided by the invention adopts a mode of combining soft sealing and hard sealing, and effectively ensures the sealing performance.
For a soft seal, a soft seal exists between the box bushing 11 and the male adapter 21. The sealing material is made of elastic material, such as rubber material. The filling position of the soft sealing material can have two positions: one is between the outer wall of the adapter tube 21 and the inner wall of the sleeve 11, in this case, the length of the female adapter sleeve 11 is greater than the length of the male adapter tube 21, the inner wall of the sleeve 11 is provided with an annular sealing groove, and a sealing ring 113 is nested inside, or the outer wall of the male adapter tube is provided with an annular sealing groove, and a sealing ring is nested inside, each sealing ring forms 1 sealing, and a plurality of sealing rings can be arranged for enhancing the sealing effect. In another case, the inner wall of the box connector sleeve 11 has a step facing the direction of the interface, the length from the step to the sleeve port is less than the length of the male connector connecting pipe, and the inner diameter of the step is less than the inner diameter of the male connector connecting pipe 21, so that the step surface can be tightly contacted with the end surface of the connecting pipe 21, and then the contact surface of the step surface and the connecting pipe 21 is provided with an elastic sealing material, which can be sealed on one side, for example, the step surface is provided with an annular groove, a gasket is arranged in the groove, or the port of the connecting pipe 21 is poured with a rubber material, or can be sealed on both sides, that is, the step surface and the port of the connecting pipe 21 are simultaneously provided with an elastic material; besides, a sealing groove and a sealing ring can be arranged between the inner wall of the sleeve 11 and the outer wall of the connecting pipe 21, so that double-layer soft sealing is formed, and the sealing effect is better.
For a hard seal, a hard seal exists between the port interface of the box sleeve 11 and the male connector. In the design structure, a step is arranged at the joint of the male connector 2 and the connecting pipe 21, the step is positioned outside the male connector, the step surface faces the direction of the pipe orifice, and when the male connector and the female connector are communicated, the step surface is contacted with the port interface of the connecting pipe 11 of the female connector. The hard seal is arranged on the contact surface, the hard seal is made of metal and is integrated with the connecting pipe into a whole, and the hard seal is formed by matching the shape of the metal material. The design of the sealing structure has two modes: a convex spherical ring structure is formed on the external step surface of the male joint, and a matched annular groove structure is formed on the port surface of the sleeve of the female joint; alternatively, as shown in fig. 1, a raised spherical ring structure 114 is formed on the port surface of the box sleeve, and a mating ring groove structure 215 is formed on the external step surface of the male connector.
In this embodiment, in addition to the above structure, the male and female connectors have a locking device 3 on the outside. The locking device can be a screw thread, namely, a locking lantern ring is arranged on the outer walls of the male connector and the female connector, a screw thread is arranged on the inner wall of the locking lantern ring, and the male connector and the female connector are locked through the screw thread; the quick-insertion type locking can also be realized through a ring groove on the inner wall of the locking lantern ring and an elastic steel ball ring on the joint; the male connector and the female connector can be respectively provided with a lock hook and a retaining ring, and the male connector and the female connector are locked in a lock hook mode.
In this embodiment, fluid flows from the male connector 2 to the female connector 1, flows axially through the passage outside the male connector gland 26 and outside the wall of the cartridge 22 cavity, changes direction at the outer edge of the bottom of the cartridge cavity to flow radially, and then flows axially along the stem of the cartridge cavity into the female connector.
Example 2
Referring to fig. 1 and 2, a coaxial self-sealing joint comprises two straight-through male joints 2 and female joints 1 which are inserted into each other, a sleeve 11, a connecting pipe 21, a valve core 22, a sealing gasket 23, a sealing ring 24, a spring 25, a sealing sleeve 26, a handle 210 and other components, and the structures and functions of the components are the same as those of embodiment 1.
The difference lies in that, in this embodiment, female joint is inside to have and to be the reverse case, seal cover, spring, the pressure cover part of arranging, and with male joint inner structure and function the same. The structure that the male connector and the female connector are provided with the valve core device is more suitable for fluid transmission with larger environmental impact caused by leakage.
In this embodiment, in order to achieve a better sealing effect, the outer bottom of the cavity of the male connector valve core 22 is designed into a concave area, the convex edge of the concave area is distributed at the edge of the outer bottom of the cavity to form a valve core knife edge 211, the whole valve core knife edge 211 just forms a ring-shaped sealing knife at the outer bottom of the cavity, and the sealing knife just forms contact sealing with an annular groove on an inner step of the common connector. The female joint may have the same structure.
In the present embodiment, a preferred embodiment of the sealing sleeve 26 is that several through holes 218 are designed on the side wall of the sealing sleeve 26 near the cavity port for passing the fluid, and the cavity port of the sealing sleeve 26 directly forms an elastic contact seal with the elastic sealing ring 23 on the step of the male connector cavity. The connecting column is arranged at the bottom outside the cavity of the sealing sleeve 26 and is connected with the center of the pressing sleeve 27, the pressing sleeve 27 is in a cross-shaped structure, and a circular through hole is arranged at the center of the cross-shaped structure and is just sleeved with the connecting column at the outer bottom of the sealing sleeve 26. Threads are arranged on the cross-shaped four end sections and are in threaded fit with the inner wall of the male connector shell. By rotating the pressing sleeve 27, the sealing sleeve 26 can be pushed to move slowly, so that the sealing sleeve 26 and the elastic sealing ring 23 are in a compressed state, and a sealing effect is achieved. The left end face of the sealing sleeve 26 presses on the sealing gasket 23 to perform a sealing function, and the action force generated by the pressure of the isolation fluid acts on the end face of the valve core. The pressing sleeve 27 is used for fixing a sealing sleeve, and a pressing ring 28 is arranged outside the pressing sleeve 27.
In this embodiment, the valve core 22, which is a key part of the sealing, is changed into a coaxial pressure balancing design, so that the valve core is balanced in force, and is not affected by the magnitude of the fluid pressure any more.
The self-sealing joint provided by the invention is applied to the field of self-sealing valves, particularly the field of inflation, and particularly the field of SF6 gas sealing.
By adopting the coaxial self-sealing joint provided by the invention, soft and hard double sealing is adopted between the male joint and the female joint: the inner part adopts elastic material for soft sealing, and the outer end surface adopts hard sealing made of metal material. The working temperature of the sealing mode is-20 ℃ to 100 ℃, and the highest working pressure can reach 0 MPa to 25 MPa. The sealing effect is good: the leakage rate is less than 10 under the working pressure of 25MPa -7 mbar·L/s。
The coaxial self-sealing joint provided by the invention adopts the combined design of the valve core and the sealing sleeve, changes the pressure direction of fluid to the valve core, changes the axial section pressure of the fluid to the valve core into the circumferential radial pressure of the side surface, has balanced axial stress of the valve body, and does not need to consider the factors of shunt pressure and differential pressure. And thus can withstand higher pressures.
While the foregoing description shows and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. The utility model provides a joint is proclaimed oneself to coaxial-type which characterized in that: the pipeline connector comprises two straight-through type male and female connectors which are mutually inserted, wherein the male and female connectors are respectively connected with a pipeline; the male connector is provided with a section of convex connecting pipe, the female connector is provided with a sleeve corresponding to the connecting pipe, the inner diameter of the sleeve is slightly larger than the outer diameter of the connecting pipe, and the sleeve can be sleeved with the connecting pipe; a telescopic movable valve core is arranged in the male connector, and a fluid channel is arranged between the valve core and the male connector shell along the axial direction; the inner wall of the male connector shell is provided with a step facing away from the interface direction, the diameter of the valve core is larger than the inner diameter of the step of the shell, and the outer edge end of the valve core is sealed with the step through an elastic material; the valve core is provided with a sunken cavity, and an opening of the cavity faces the sealing sleeve; the outer diameter of the valve core cavity is slightly smaller than the inner diameter of the seal sleeve cavity, and a seal ring is arranged in a gap between the outer wall of the valve core cavity and the inner wall of the seal sleeve cavity; a spring is arranged between the valve core cavity and the seal sleeve cavity; the bottom of the valve core cavity is also provided with a through hole, and one side of the bottom of the valve core, which is back to the cavity, is provided with a core handle; the sleeve and the adapter tube are sealed by elastic materials; locking devices are arranged outside the male joint and the female joint; the male connector is also internally provided with a sealing sleeve, a fluid channel is arranged between the outer wall of the sealing sleeve and the inner wall of the male connector shell, the sealing sleeve is provided with a concave cavity, the opening of the cavity faces the connecting pipe, and the sealing sleeve is fixedly connected with the shell of the male connector; the length of the female joint sleeve is greater than that of the male joint connecting pipe, at least the inner wall of the female joint sleeve or the outer wall of the male joint connecting pipe is provided with an annular sealing groove, and a sealing ring is nested in the sealing groove; the inner wall of the female joint sleeve is provided with a step facing the direction of the interface, the length from the step to the sleeve port is less than the length of the male joint connecting pipe, the inner diameter of the step is less than the inner diameter of the male joint connecting pipe, and the step surface is contacted with the end surface of the connecting pipe; elastic sealing materials are arranged between the step surface and the contact surface of the connecting pipe or the inner wall of the sleeve and the outer wall of the connecting pipe; the side wall of the sealing sleeve, which is close to the cavity port, is provided with a plurality of through holes, and the cavity port of the sealing sleeve and the step of the male connector cavity are sealed by elastic materials; the connecting column is arranged on the outer side of the bottom of the cavity of the sealing sleeve and fixedly connected with the shell of the joint through the pressing sleeve, the pressing sleeve is of a cross structure, four cross ends of the pressing sleeve are connected with the shell of the joint, a circular through hole is formed in the center of the cross, and the through hole is used for fixing the sealing sleeve.
2. The coaxial self-sealing joint of claim 1, wherein: when the male connector and the female connector are connected, fluid flows from the male connector to the female connector, flows along the axial direction in a channel outside the sealing sleeve wall of the male connector and outside the wall of the valve core cavity body, changes the flow direction at the outer edge end of the bottom of the valve core cavity body and flows along the radial direction, and flows axially after reaching the core handle at the bottom outside the valve core cavity body and enters the female connector; before and after the fluid is communicated, the axial stress of the valve core is balanced and is not influenced by the pressure of the fluid.
3. The coaxial self-sealing joint of claim 1, wherein: the elastic sealing material is rubber, and the sealing mode is that the rubber material is arranged at least on the step surface or the outer edge end of the valve core; or an annular sealing groove is arranged on the step surface, and a sealing gasket is nested in the sealing groove.
4. The coaxial self-sealing joint of claim 2, wherein: at least the outer wall of the valve core cavity or the inner wall of the sealing cover cavity is provided with an annular sealing groove, and a sealing ring is nested in the sealing groove.
5. The coaxial self-sealing fitting of claim 4, wherein: the bottom surface of the outer edge end of the valve core is provided with a sunken area, the edge of the bottom end is in a knife edge structure to form a sealing knife, and the sealing knife is in close contact with the sealing ring through the elastic force of a spring.
6. The coaxial self-sealing joint according to any one of claims 1 to 5, wherein: the outer part of the joint of the male joint and the connecting pipe is provided with a step, and the surface of the step faces the direction of the pipe orifice and is in contact with the port surface of the female joint sleeve; at least a convex spherical ring structure is formed on the external step surface of the male joint or the port surface of the sleeve of the female joint, and the other end surface contacted with the spherical ring structure forms a matched annular groove structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710493254.5A CN107152575B (en) | 2017-06-26 | 2017-06-26 | Coaxial self-sealing joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710493254.5A CN107152575B (en) | 2017-06-26 | 2017-06-26 | Coaxial self-sealing joint |
Publications (2)
| Publication Number | Publication Date |
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| CN107152575A CN107152575A (en) | 2017-09-12 |
| CN107152575B true CN107152575B (en) | 2022-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710493254.5A Active CN107152575B (en) | 2017-06-26 | 2017-06-26 | Coaxial self-sealing joint |
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| CN (1) | CN107152575B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110230734A (en) * | 2018-03-05 | 2019-09-13 | 长城汽车股份有限公司 | Leakage-preventing sealing device and connector |
| CN110454630B (en) * | 2018-06-29 | 2021-06-04 | 中航光电科技股份有限公司 | Male and female integrated joint |
| CN109458509A (en) * | 2018-12-28 | 2019-03-12 | 宁波中迪机械有限公司 | Fast-type self-sealing joint component |
| CN109538862A (en) * | 2018-12-28 | 2019-03-29 | 宁波中迪机械有限公司 | Movable flange type tracheae component |
| CN109519643A (en) * | 2018-12-28 | 2019-03-26 | 宁波中迪机械有限公司 | Shock type tracheae component |
| CN112377704B (en) * | 2020-11-30 | 2022-06-10 | 淄博能源研究院 | Fluid rotatable direction-changing self-sealing pipe joint |
| CN112827979B (en) * | 2020-12-30 | 2022-06-14 | 深圳市步锐生物科技有限公司 | Automatic cleaning device for expired air bag |
| CN114233958A (en) * | 2021-12-03 | 2022-03-25 | 北方导航控制技术股份有限公司 | High-sealing self-sealing quick joint |
| CN114673844B (en) * | 2022-03-30 | 2022-11-25 | 重庆大学 | Self-sealing separating joint for preventing aircraft fuel system from crash |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19516029C1 (en) * | 1995-05-04 | 1996-10-10 | Messer Griesheim Gmbh | Coupling for ends of piping carrying low temp. media |
| SE0303359D0 (en) * | 2003-12-10 | 2003-12-10 | Maquet Critical Care Ab | Switching System |
| CN103162040A (en) * | 2011-12-12 | 2013-06-19 | 常州市永春机电设备有限公司 | Connector |
| CN103162035A (en) * | 2011-12-12 | 2013-06-19 | 常州市永春机电设备有限公司 | Quick butt joint |
| DE102014010570B4 (en) * | 2014-07-16 | 2023-10-12 | U.M. Gewerbeimmobilien Gmbh & Co. Kg | Coupling part for a coupling for pressure fluid lines |
| CN207018695U (en) * | 2017-06-26 | 2018-02-16 | 南通虹登机械设备有限公司 | A kind of coaxial-type self-sealing joint |
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2017
- 2017-06-26 CN CN201710493254.5A patent/CN107152575B/en active Active
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| CN107152575A (en) | 2017-09-12 |
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