CN107763337A - A kind of leakproof hydraulic tube cutting ferrule - Google Patents
A kind of leakproof hydraulic tube cutting ferrule Download PDFInfo
- Publication number
- CN107763337A CN107763337A CN201610690354.2A CN201610690354A CN107763337A CN 107763337 A CN107763337 A CN 107763337A CN 201610690354 A CN201610690354 A CN 201610690354A CN 107763337 A CN107763337 A CN 107763337A
- Authority
- CN
- China
- Prior art keywords
- oil pipe
- hydraulic oil
- sealing
- cutting ferrule
- sealing area
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- 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
- F16L19/0218—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member using specially adapted sealing means comprising only sealing rings
-
- 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
- F16L19/06—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 in which radial clamping is obtained by wedging action on non-deformed pipe ends
- F16L19/065—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 in which radial clamping is obtained by wedging action on non-deformed pipe ends the wedging action being effected by means of a ring
Abstract
The invention discloses a kind of leakproof hydraulic tube cutting ferrule, including joint body, hydraulic oil pipe and nut, joint body is set on hydraulic oil pipe, inner conical surface interface is provided with the connection end of joint body and hydraulic oil pipe, loose slot is provided with one end of joint body described in nut face, cutting ferrule is arranged in loose slot and its inwall is bonded with hydraulic oil pipe outer circle wall, cutting ferrule is made up of buffer part and sealing, axis direction of the sealing along cutting ferrule is towards extending in inner conical surface interface, annular space between primary sealing area and secondary sealing area and hydraulic oil pipe.Primary sealing area is brought into close contact with hydraulic oil pipe outer circle wall, annular space is kept between secondary sealing area and hydraulic oil pipe outer circle wall, the inwall of sealing body is brought into close contact with hydraulic oil pipe outer circle wall, and side wall of the arc enlarged portion on the side wall of buffer part and its outer wall respectively with loose slot is brought into close contact, ensure air-tightness of the ferrule assemblies under high-temperature and high-pressure conditions.
Description
Technical field
The present invention relates to a kind of hydraulic tube, in particular to a kind of leakproof hydraulic tube cutting ferrule.
Background technology
Traditional hydraulic pipe joint sleeve only has a sealing cutting edge in structure, belongs to metal contact seal, its function
It is in oil pipe and pipe joint assembly connection, tightening nuts, by the extruding of the hydraulic fitting body taper hole conical surface, connects hydraulic tube
The cutting edge incision oil pipe top layer of head cutting ferrule reaches metal contact seal, if tightening nuts overexertion, may result in hydraulic tube and connects
Excessively incision damages oil pipe to head cutting ferrule cutting edge, causes hydraulic pipe joint sleeve to rupture;And traditional hydraulic pipe joint sleeve institute
The operating pressure that can be born is no more than 40Mpa, and hydraulic pipe joint sleeve break accident may occur after exceeding.
Traditional hydraulic pipe joint sleeve in impulsive force and higher oscillation intensity and temperature be up to more than 100 DEG C and
Vibration frequency in more than 60Mpa and acidity, mine working environment, easily deforms in more than 40Hz, pressure, ftractures and occur
Leakage, service life are short, it is impossible to reach high-end hydraulic fitting pressure in more than 60Mpa, acidity, mine, temperature at 100 DEG C
Above and the job requirement that is used in more than 40Hz harsh and unforgiving environments of vibration frequency.
The content of the invention
It is an object of the invention to provide a kind of leakproof hydraulic tube cutting ferrule, raising is fastened in close under high temperature, condition of high voltage
Envelope property or reliability, avoid being fastened in rupture under heavy duty and adverse circumstances, leakage.
The purpose of the present invention is achieved through the following technical solutions:
A kind of leakproof hydraulic tube cutting ferrule, including joint body, hydraulic oil pipe and the nut coordinated with hydraulic oil pipe screw thread, joint
Body is set on hydraulic oil pipe, is provided with inner conical surface interface in the connection end of the joint body and hydraulic oil pipe, in nut just
Loose slot is provided with to one end of the joint body, cutting ferrule is arranged in loose slot and its inwall pastes with hydraulic oil pipe outer circle wall
Close, the cutting ferrule is made up of buffer part and sealing, and the buffer part is eyelet, and the outer circle wall of buffer part is provided with
Radially outstanding and section is the enlarged portion of arc, and the arc top of enlarged portion contacts with loose slot upper wall, the sealing
Be connected with buffer part side wall and along the axis direction of cutting ferrule towards inner conical surface interface in extend, the elongated end outer wall of the sealing with
Inner conical surface interface inwall is adapted, and the elongated end inwall of sealing is provided with primary sealing area and secondary sealing area, sealing sheet
The inwall of body is bonded with hydraulic oil pipe, annular space between primary sealing area and secondary sealing area and hydraulic oil pipe, and primary sealing area
Longitudinal cross-section be horizontal plane, the longitudinal cross-section of secondary sealing area is the curved surface being radially outward recessed along cutting ferrule, in the sealing
Multiple sections are offered in portion and the buffer part inwall being attached thereto as circular isolation channel, and multiple isolation channels is straight
Footpath is horizontally directed to be incremented by the direction of nut along joint body.
During present invention work, regulating nut is allowed to move towards close to the direction of joint body along the axis direction of hydraulic oil pipe
Dynamic, when the side wall of loose slot contacts with the side wall of buffer part, nut movement can directly drive and be fastened in the cylindrical of hydraulic oil pipe
Moved on perisporium, now the elongated end of sealing is initially entered in inner conical surface interface, and keep the outer wall of elongated end with it is interior
Conical surface interface inwall is engaged, due to annular space between primary sealing area and secondary sealing area and hydraulic oil pipe outer circle wall, and
Two sealing surfaces are the curved surface being radially outward recessed along cutting ferrule, and the curved surface active force that its own is subject to after extruding can inwardly expand
, while the deformation that the elongated end of sealing can be moved in moving process so that primary sealing area and hydraulic oil pipe
Outer circle wall is bonded completely, and then is realized and held hydraulic oil pipe tightly;When the elongated end of sealing is moved to its extreme position, cutting ferrule with
The mated condition of hydraulic oil pipe is that primary sealing area is brought into close contact with hydraulic oil pipe outer circle wall, secondary sealing area and hydraulic oil
Annular space is kept between pipe outer circle wall, inwall and the hydraulic oil pipe outer circle wall of sealing body are brought into close contact, and buffer part
Side wall of the arc enlarged portion respectively with loose slot in side wall and its outer wall is brought into close contact, that is, realizes cutting ferrule, joint body
And being fully sealed between nut three, ensure air-tightness of the joint ferrule assemblies under high-temperature and high-pressure conditions, avoid cutting ferrule
Rupture, leakage under heavy duty and adverse circumstances.Wherein, buffer part is eyelet so that can when being extruded by nut
A certain amount of deformation is produced, while the enlarged portion of its arc is extruded into and contacted with loose slot upper wall, and the lower end of buffer part is then
Contacted with hydraulic oil pipe, can not only increase the buffering effect impacted during nut movement to sealing, avoid the extension of sealing
It is excessively mobile impaired, moreover it is possible to further to improve the seal between cutting ferrule, joint body and nut three.
Also, multiple sections are offered on sealing and the buffer part inwall being attached thereto as circular isolation channel,
After nut extruding cutting ferrule, sealing and buffer part are by a certain degree of extruding force so that the air in isolation channel is arranged
Go out a part, compared with ambient pressure, the air pressure in isolation channel is relatively low, that is, causes outer wall shape of the isolation channel to hydraulic oil pipe
Into negative pressure, i.e. isolation channel can produce certain suction-operated to hydraulic oil pipe, and then strengthen enclasping force of the cutting ferrule to hydraulic oil pipe
Degree;Simultaneously when primary sealing area Local Damaged occurs and reduces the air-tightness between hydraulic oil pipe outer circle wall, Duo Gezhi
The incremental isolation channel in footpath can be obstructed step by step to the fluid leaked, particularly the isolation channel on buffer part inwall, be delayed
It is maximum by deformation quantity caused by the extruding of two side walls of loose slot to rush portion so that the isolation channel at this is to the outer of hydraulic oil pipe
The holding dynamics of circumferential wall reaches optimal, that is, realizes multi-stage sealed, avoids under high-temperature and high-pressure conditions hydraulic oil pipe from oil leak occur and shows
As.
Also include sealing ring, the sealing ring is arranged in the annular space of secondary sealing area and hydraulic oil pipe.In sealing
During elongated end stress, applied stress inward expansion that secondary sealing area is subject to, and then realize primary sealing area and sealing sheet
Holding between body bottom surface and hydraulic oil pipe, while sealing ring is installed in the annular space of secondary sealing area and hydraulic oil pipe, utilize
The elastic deformation ability of sealing ring can prevent secondary sealing area from excessive compressional deformation is occurring, to ensure joint ferrule assemblies
Job stability.
The taper of the inner conical surface interface is 0.1 ~ 0.2.Preferably, the taper of inner conical surface interface is arranged to 0.1 ~
0.2, ensure that the elongated end of sealing enters in inner conical surface interface within a short period of time, while ensure primary sealing area and hydraulic pressure
Possess enough contact surfaces between oil pipe outer circle wall to realize the maximum sealing effectiveness in the first sealing stage.
The present invention compared with prior art, has the following advantages and advantages:
1st, buffer part of the invention is eyelet so that a certain amount of deformation can be produced when being extruded by nut, together
When its arc enlarged portion be extruded into and contacted with loose slot upper wall, and the lower end of buffer part then contacts with hydraulic oil pipe, not only
The buffering effect impacted during nut movement to sealing can be increased, avoid the extension of sealing excessively mobile impaired, moreover it is possible to enter
One step improves the seal between cutting ferrule, joint body and nut three;
2nd, the applied stress inward expansion of the invention that in the elongated end stress of sealing, secondary sealing area is subject to, and then realize
Holding between primary sealing area and sealing body bottom surface and hydraulic oil pipe, while in secondary sealing area and hydraulic oil pipe
Installation sealing ring in annular space, it can prevent secondary sealing area from excessive extruding shape is occurring using the elastic deformation ability of sealing ring
Become, to ensure the job stability of joint ferrule assemblies;
3rd, the taper of inner conical surface interface is arranged to 0.1 ~ 0.2 by the present invention, ensures that the elongated end of sealing enters within a short period of time
Enter into inner conical surface interface, while ensure to possess between primary sealing area and hydraulic oil pipe outer circle wall enough contact surfaces with reality
The maximum sealing effectiveness in existing first sealing stage.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, forms one of the application
Point, do not form the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of the present invention;
Mark and corresponding parts title in accompanying drawing:
1- joint bodies, 2- hydraulic oil pipes, 3- inner conical surfaces interface, 4- sealings, 5- sealing rings, 6- buffer parts, 7- nuts, 8-
One sealing surface, 9- secondary sealing areas, 10- loose slots, 11- isolation channels.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment 1
As shown in figure 1, the present embodiment includes joint body 1, hydraulic oil pipe 2 and the nut 7 coordinated with the screw thread of hydraulic oil pipe 2,
Joint body 1 is set on hydraulic oil pipe 2, and inner conical surface interface 3 is provided with the connection end of the joint body 1 and hydraulic oil pipe 2,
Loose slot 10 is provided with one end of joint body 1 described in the face of nut 7, cutting ferrule is arranged in loose slot 10 and its inwall and hydraulic pressure
The outer circle wall of oil pipe 2 is bonded, and the cutting ferrule is made up of buffer part 6 and sealing 4, and the buffer part 6 is eyelet, buffering
The outer circle wall in portion 6 is provided with the enlarged portion that radially outstanding and section is arc, the arc top of enlarged portion and loose slot
10 upper walls contact, and the sealing 4 is connected with the side wall of buffer part 6 and extended along the axis direction of cutting ferrule towards inner conical surface interface 3 is interior,
The elongated end outer wall of the sealing 4 is adapted with the inwall of inner conical surface interface 3, and the elongated end inwall of sealing 4 is provided with first
Sealing surface 8 and secondary sealing area 9, the inwall of the body of sealing 4 are bonded with hydraulic oil pipe 2, primary sealing area 8 and secondary sealing area
Annular space between 9 and hydraulic oil pipe 2, and the longitudinal cross-section of primary sealing area 8 is horizontal plane, the longitudinal cross-section of secondary sealing area 9 is
The curved surface being radially outward recessed along cutting ferrule, multiple sections are offered on the sealing 4 and the inwall of buffer part 6 being attached thereto
Face is circular isolation channel 11, and the diameter of multiple isolation channels 11 is horizontally directed to pass on the direction of nut 7 along joint body 1
Increase.
During work, regulating nut is allowed to move towards the direction close to joint body 1 along the axis direction of hydraulic oil pipe 2, when
When the side wall of loose slot 10 contacts with the side wall of buffer part 6, the movement of nut 7 can directly drive and be fastened in the cylindrical of hydraulic oil pipe 2
Moved on perisporium, now the elongated end of sealing 4 is initially entered in inner conical surface interface 3, and keep the outer wall of elongated end with
The inwall of inner conical surface interface 3 is engaged, due to ring between primary sealing area 8 and secondary sealing area 9 and the outer circle wall of hydraulic oil pipe 2
Sky, and secondary sealing area 9 is the curved surface that is radially outward recessed along cutting ferrule, the curved surface active force that its own is subject to after extruding
Can inward expansion, while the deformation that the elongated end of sealing 4 can be moved in moving process so that primary sealing area 8 with
The outer circle wall of hydraulic oil pipe 2 is bonded completely, and then is realized and held hydraulic oil pipe 2 tightly;When the elongated end of sealing 4 is moved to its pole
Extreme position, the mated condition of cutting ferrule and hydraulic oil pipe 2 are that primary sealing area 8 is brought into close contact with the outer circle wall of hydraulic oil pipe 2, the
Annular space, inwall and the outer circle wall of hydraulic oil pipe 2 of the body of sealing 4 are kept between two sealing surfaces 9 and the outer circle wall of hydraulic oil pipe 2
It is brought into close contact, and side wall of the arc enlarged portion on the side wall of buffer part 6 and its outer wall respectively with loose slot 10 is brought into close contact,
Being fully sealed between cutting ferrule, joint body 1 and the three of nut 7 is realized, ensures joint ferrule assemblies in HTHP
Under the conditions of air-tightness, avoid being fastened in rupture under heavy duty and adverse circumstances, leakage.Wherein, buffer part 6 is eyelet,
So that a certain amount of deformation can be produced when being extruded by nut, while the enlarged portion of its arc is extruded into and loose slot 10
Upper wall contacts, and the lower end of buffer part 6 then contacts with hydraulic oil pipe 2, can not only increase sealing 4 is impacted during nut movement
Buffering effect, avoid the extension of sealing 4 excessively mobile impaired, moreover it is possible to further to improve cutting ferrule, joint body 1 and nut
Seal between 7 threes.
Also, multiple sections are offered on sealing 4 and the inwall of the buffer part being attached thereto 6 as circular isolation channel
11, after nut 7 extrudes cutting ferrule, sealing 4 and buffer part 6 are by a certain degree of extruding force so that in isolation channel 11
Air is discharged a part, and compared with ambient pressure, the air pressure in isolation channel 11 is relatively low, that is, causes isolation channel 11 to hydraulic pressure
The outer wall of oil pipe 2 forms negative pressure, i.e., isolation channel 11 can produce certain suction-operated to hydraulic oil pipe 2, and then strengthen cutting ferrule pair
The holding dynamics of hydraulic oil pipe 2;Simultaneously primary sealing area 8 there is Local Damaged and reduce with the outer circle wall of hydraulic oil pipe 2 it
Between air-tightness when, the isolation channel 11 of multiple increasing diameters can be obstructed step by step to the fluid leaked, particularly slow
The isolation channel 11 rushed on the inwall of portion 6, buffer part 6 is maximum by deformation quantity caused by the extruding of 10 two side walls of loose slot, makes
Isolation channel 11 that must be at this reaches optimal to the holding dynamics of the outer circle wall of hydraulic oil pipe 2, that is, realizes multi-stage sealed, avoids height
There is oil leakage phenomenon in hydraulic oil pipe 2 under warm condition of high voltage.
In the elongated end stress of sealing 4, applied stress inward expansion that secondary sealing area 9 is subject to, and then realize
Holding between one sealing surface 8 and the body bottom surface of sealing 4 and hydraulic oil pipe 2, while in secondary sealing area 9 and hydraulic oil pipe
Installation sealing ring 5 in 2 annular space, it can prevent secondary sealing area 9 from excessive squeeze is occurring using the elastic deformation ability of sealing ring 5
Swaging becomes, to ensure the job stability of joint ferrule assemblies.
Preferably, the taper of inner conical surface interface 3 is arranged into 0.1 ~ 0.2, ensure the elongated end of sealing 4 when shorter
In enter in inner conical surface interface 3, while ensure to possess between primary sealing area 8 and the outer circle wall of hydraulic oil pipe 2 enough
Contact surface is to realize the maximum sealing effectiveness in the first sealing stage.
Above-described embodiment, the purpose of the present invention, technical scheme and beneficial effect are carried out further
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc., all should include
Within protection scope of the present invention.
Claims (3)
1. a kind of leakproof hydraulic tube cutting ferrule, including joint body(1), hydraulic oil pipe(2)And and hydraulic oil pipe(2)Screw thread coordinates
Nut(7), joint body(1)It is set in hydraulic oil pipe(2)On, it is characterised in that:In the joint body(1)With hydraulic oil
Pipe(2)Connection end be provided with inner conical surface interface(3), in nut(7)Joint body described in face(1)One end be provided with loose slot
(10), cutting ferrule is arranged on loose slot(10)Interior and its inwall is bonded with hydraulic oil pipe outer circle wall, and the cutting ferrule is by buffer part(6)
And sealing(4)Composition, the buffer part(6)For eyelet, buffer part(6)Outer circle wall be provided with radially to
Outer protrusion and section are the enlarged portion of arc, the arc top of enlarged portion and loose slot(10)Upper wall contacts, the sealing(4)With delaying
Rush portion(6)Side wall connects and along the axis direction of cutting ferrule towards inner conical surface interface(3)Interior extension, the sealing(4)Elongated end
Outer wall and inner conical surface interface(3)Inwall is adapted, sealing(4)Elongated end inwall be provided with primary sealing area(8)With second
Sealing surface(9), sealing(4)The inwall and hydraulic oil pipe of body(2)Fitting, primary sealing area(8)With secondary sealing area(9)With
Hydraulic oil pipe(2)Between annular space, and primary sealing area(8)Longitudinal cross-section be horizontal plane, secondary sealing area(9)Longitudinal cross-section
For the curved surface being radially outward recessed along cutting ferrule, in the sealing(4)And the buffer part being attached thereto(6)Offered on inwall
Multiple sections are circular isolation channel(11), and multiple isolation channels(11)Diameter along joint body(1)It is horizontally directed to spiral shell
Cap(7)Direction on be incremented by.
A kind of 2. leakproof hydraulic tube cutting ferrule according to claim 1, it is characterised in that:Also include sealing ring(5), it is described close
Seal(5)Installed in secondary sealing area(9)With hydraulic oil pipe(2)Annular space in.
A kind of 3. leakproof hydraulic tube cutting ferrule according to claim 1, it is characterised in that:The inner conical surface interface(3)Cone
Spend for 0.1 ~ 0.2.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201610690354.2A CN107763337A (en) | 2016-08-20 | 2016-08-20 | A kind of leakproof hydraulic tube cutting ferrule |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201610690354.2A CN107763337A (en) | 2016-08-20 | 2016-08-20 | A kind of leakproof hydraulic tube cutting ferrule |
Publications (1)
Publication Number | Publication Date |
---|---|
CN107763337A true CN107763337A (en) | 2018-03-06 |
Family
ID=61261785
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201610690354.2A Withdrawn CN107763337A (en) | 2016-08-20 | 2016-08-20 | A kind of leakproof hydraulic tube cutting ferrule |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN107763337A (en) |
-
2016
- 2016-08-20 CN CN201610690354.2A patent/CN107763337A/en not_active Withdrawn
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Legal Events
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PB01 | Publication | ||
PB01 | Publication | ||
WW01 | Invention patent application withdrawn after publication | ||
WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180306 |