The content of the invention
The purpose of this utility model is to provide a kind of axial buckle press joint, solves traditional jointing bonding strength low, anti-
Pull-off is poor, do not have the technical problem of auto-lock function.
This utility model adopts following technical scheme:
A kind of axial buckle press joint, including lap joint flange (1), flexible pipe body (10);The lap joint flange (1) is ring flange
Structure, the flexible pipe body (10) include inner glue layer (2), casing play (3), outer glue-line (4) from inside to outside successively, and described withholding connects
Head is located at the termination of the flexible pipe body (10), it is characterised in that:
The buckle press joint also includes outer press ring (5), inner pressure ring (6), and the outer press ring (5), inner pressure ring (6) are annular sleeve
The inner glue layer (2) of the flexible pipe body (10) end is enclosed within outside structure, the outer press ring (5) outward, described inner glue layer (2) end
The boss (21) of a ring shape is provided with outward, outer press ring (5) the inner ring end is provided with corresponding ring-shaped depression (51),
The boss (21) is embedded in the depression (51) sealing structure for forming joint and pumped (conveying) medium in pipe;The outer press ring (5)
Being turned down along its outer ring backward makes its section L-shaped, and it is tubular pressure ring (52) to rout up part;
Outwards turnover makes its section in the L-type stood upside down to described its end face of inner pressure ring (6) front end edge, inner pressure ring (6) set
It is cylindrical jacket (62) in the casing play (3) part outward, cylindrical jacket (62) rear end is connect with the outer glue-line (4)
Contacting surface offsets into inclined-plane, and the contact surface of the outer glue-line (4) is located at the contact surface on the inclined-plane with the cylindrical jacket (62)
Constitute and the sealing structure outside body;The part that the inner pressure ring (6) is turned up is annular disk (61), before the casing play (3)
End outwards turns down anti-package residence backward and states annular disk (61) front end face and side wall, and the annular disk (61) is embedded in the outer press ring
(5) L-shaped is wrapped, and the front end face of the annular disk (61) is offseted and accommodates the bone with the rear end face of the outer press ring (5)
Rack-layer (3), annular disk (61) described in tubular pressure ring (52) overcoat simultaneously clamp the casing play (3) front end, the tubular pressure
Thickness of the height of ring (52) less than the annular disk (61), the lap joint flange (1) are socketed on the cylindrical jacket (62)
And offset with the rear end face of the annular disk (61), the inner glue layer (2) of the flexible pipe body (10), casing play (3), outer glue-line
(4), outer press ring (5), inner pressure ring (6) Jing sulfurations is integrally formed.
The outer press ring (5), inner pressure ring (6), lap joint flange (1) are made of metal materials.
The outer press ring (5), the contact surface of inner pressure ring (6) are provided with the waveform or jagged teeth being mutually twisted
(7) occlusion compresses the casing play (3).
The flexible pipe body inner glue layer (2), outer glue-line (4) are quality of rubber materials, and the casing play (3) is using impregnation aramid fiber curtain
Line makes, and flexible pipe body (10) the Jing sulfurations are integrally formed;The outer press ring (5), inner pressure ring (6) contact surface gluing.
The deflection angle that turns up of the inner pressure ring (6) for arc transition, described outer press ring (5) to should circular arc camber line is set
Transition.
Advantage of the present utility model is as follows:
1. this utility model axial direction buckle press joint structure digs anti-package structure by casing play 3, and conventional radial is withheld shape
Formula is converted to axially withholds, and both withhold size quite, i.e., on the premise of strength of joint, anti-pulling-and-doffing performance and reliability is ensured,
Axial space size is saved, compared with the common flex of equal length is taken over, body flexible section is longer, and vibration shock isolation performance is more
It is excellent.The joint and body more strong bonded are made using sulfuration integrated forming technique, intensity, the anti-pulling-and-doffing performance of joint is enhanced
And security reliability.Adopt this utility model axial direction buckle press joint structure to realize and obtain good with little bump joint size
Strength of joint, anti-pulling-and-doffing performance, sealing and reliability;
2., after this utility model axial direction buckle press joint is installed, it is bolted, joint each several part clamping, inside and outside pressure ring
Structure design and due to Design and Machining match it is wavy or angled fall laciniation, after casing play 3 is compressed,
Inside and outside pressure ring pressing locking is capable of achieving auto-lock function, with the increase of pipe in-vivo medium pressure, acts on joint casing play 3
Pressure force also accordingly increases, and further strengthens auto-lock function, reaches the preferable mechanical state of joint design;Under elevated pressure conditions certainly
Lock function advantage becomes apparent from, further reinforced joint intensity and reliability.Ensure that its damping, impact resistance and its can
By property.
3. the flexibility connection pipe sealing surface of this utility model axial direction buckle press joint is metal joint rigid seal, non-aging,
It is capable of achieving multiple installing/dismounting, installation accuracy and requires that low, reliability is high, connection can be effectively ensured from appropriate sealing member close
Feng Xing;Compare traditional flange to live the sealing surface of flanged fitting structure, which adopts the sealing surface of rubber turnup structure, easy creep,
It is easily aging, repeatedly install and use and easily cause rubber face destruction, installation accuracy and have high demands, so as to be easily caused seal failure.
4. this utility model axial direction buckle press joint simple structure, easily manufactured, and coordinating lap joint flange to rotate freely can be
Realize flexibly installing in little space.
5. flexibility connection pipe latus rectum DN32 can be reached using axial buckle press joint structure and its sulfuration integrated forming technique
25~20MPa burst pressures joint is being born without damage in the range of~DN100, in the range of latus rectum DN125~DN250,15 is being born
~12MPa burst pressure joints are without damage;Under 1.33 times of operating pressures, pulsating fatigue reaches No. 400,000 joints without damage.
Embodiment 1
Referring to shown in Fig. 4-8, a kind of axial buckle press joint, including lap joint flange 1, flexible pipe body 10;The lap joint flange 1
For flange plate structure, from inside to outside successively including inner glue layer 2, casing play 3, outer glue-line 4, described withholding connects the flexible pipe body 10
Head is located at the termination of the flexible pipe body 10,
The buckle press joint also includes outer press ring 5, inner pressure ring 6, and the outer press ring 5, inner pressure ring 6 are annular nested structure, institute
State and be enclosed within outside the inner glue layer 2 of 10 end of the flexible pipe body outside outer press ring 5, outside described 2 end of inner glue layer, be provided with a ring
The boss 21 of shape, 5 inner ring end of the outer press ring are provided with corresponding ring-shaped depression 51, and the boss 21 is embedded in described recessed
Fall into the sealing structure that joint and pumped (conveying) medium in pipe are formed in 51;The outer press ring 5 is turned down backward along its outer ring makes its section be in L
Type, it is tubular pressure ring 52 to rout up part;
The outside turnover of its end face of 6 front end edge of the inner pressure ring makes its section in the L-type stood upside down, and the inner pressure ring 6 is enclosed within institute
It is cylindrical jacket 62 to state the part outside casing play 3, and the contact surface of 62 rear end of the cylindrical jacket and the outer glue-line 4 is into inclined-plane phase
Support, the contact surface of the outer glue-line 4 is located on the inclined-plane outside the contact surface composition with the cylindrical jacket 62 and body
Sealing structure;The part that the inner pressure ring 6 turns up is annular disk 61, and 3 front end of the casing play outwards turns down anti-package residence backward
61 front end face of annular disk and side wall are stated, the annular disk 61 is embedded in the L-shaped of the outer press ring 5 and is wrapped, the annular disk 61
Front end face is offseted and accommodates the casing play 3, annular disk described in 52 overcoat of tubular pressure ring with the rear end face of the outer press ring 5
61 and clamp 3 front end of the casing play, the thickness of the height of the tubular pressure ring 52 less than the annular disk 61, the kink method
Blue 1 is socketed on the cylindrical jacket 62 and is offseted with the rear end face of the annular disk 61, the inner glue layer of the flexible pipe body 10
2nd, casing play 3, outer glue-line 4, outer press ring 5,6 Jing of inner pressure ring sulfurations is integrally formed.
The outer press ring 5, inner pressure ring 6, lap joint flange 1 are made of metal materials.
The outer press ring 5, the contact surface of inner pressure ring 6 are provided with the waveform that is mutually twisted or jagged teeth 7 are stung
The tight casing play 3 of combined pressure.
The flexible pipe body inner glue layer 2, outer glue-line 4 are quality of rubber materials, and the casing play 3 is using impregnation aromatic polyamide cord system
Make, 10 Jing of flexible pipe body sulfurations are integrally formed;The outer press ring 5,6 contact surface gluing of inner pressure ring.
The deflection angle that turns up of the inner pressure ring 6 is arc transition, and described outer press ring 5 pairs should circular arc setting camber line mistake
Cross.
Using method and self-lock mechanism:
Flexibility connection pipe is connected with pipeline, needs the pipe interface of docking to be similarly flange-interface, it is described in this programme
Lap joint flange axial direction buckle press joint is docked with flange-interface and is bolted pretension.Now by continuous pretension bolt, two methods
It is blue constantly to be extruded by pretension, at the same time, press the outer press ring, inner pressure ring.The casing play that turns up thus compressed naturally, by
In the waveform or jagged teeth 7 that are mutually twisted is provided with, so as to define auto-lock function, with pipe in-vivo medium pressure
Strong increase, acts on pressure force on joint casing play 3 and also accordingly increases, further strengthen auto-lock function, under elevated pressure conditions
Auto-lock function advantage becomes apparent from.In addition the boss of the body inner glue layer has been due to being lying in the depression, the outer press ring
Can also promote to press the body inner glue layer end face and need mating interface end face.That is, the pretension of bolt is not only docked
Interface is secured, the casing play has also been compressed.This utility model significantly simplifies attachment structure, the length reduction of joint design
, installation is facilitated, deadweight is reduced, can be completed to install in small space.
Form is axially withheld using this utility model joint and body pressing and forming are realized in less space, by flange
The sealing position of joint is designed as inside and outside pressure ring composite construction, and it is wavy or angled that inside and outside pressure ring Design and Machining matches
Fall laciniation, inside and outside pressure ring Jing process after by body framework material end fasten compress, by sulfidization molding, make to connect
Head is combined as a whole with framework material;When gradually being fastened with bolt in flange installation process, inside and outside pressure ring pressing locking, bone
Frame material is connected even closer with joint, enhances strength of joint, reliability and anti-pulling-and-doffing performance, and due to scratching using the joint
Property adapter sealing surface be metal rigidity sealing, connection sealing can be effectively ensured from appropriate sealing member, while being difficult old
Change.
During processing, the stitching surface of the inside and outside pressure ring of joint is reached and rubber through sandblasting, cleaning, spraying adhesive, drying
And the requirement of framework material excellent bonds;Traditionally complete flexibility connection pipe body cladding, winding after, erection joint and will pipe
Body framework material is dug with inside and outside pressure ring clamping, using frock compression, framework material and joint sulfidization molding, makes joint and bone
Rack-layer 3, inner glue layer 2, outer glue-line 4 are combined as a whole and constitute entirety.Bone is ensured using inside and outside pressure ring contact surface adhesive for spraying
The bonding strength of frame material and metal joint.
This utility model axial direction buckle press joint structure obtains good strength of joint, resistance to plucking with little bump joint size and takes off
Property, sealing and reliability, and joint design is simple, lightweight, easy for installation;Design of material, interface size design can be passed through
Flexibility connection pipe is made to be applied to the various workings such as different interface shapes, inside nominal diameter, working media with pipe structure design.Using
This utility model axial direction buckle press joint structure and its integrated molding technology can reach flexibility connection pipe latus rectum DN32~DN100 models
Enclose inherence and 25~20MPa burst pressures joint is born without damage, to bear 15~12MPa quick-fried in the range of latus rectum DN125~DN250
Broken compression fittings are without damage;Under 1.33 times of operating pressures, pulsating fatigue reaches No. 400,000 joints without damage, be effectively ensured equipment and
The security reliability of pipe-line system.
Application examples 1
According to axial buckle press joint structure and its integrated molding Analyzing on Building A Planning Scheme trial-production flexibility connection pipe, analysis verification connects
Head reliability.
Flexibility connection pipe latus rectum DN250, operating pressure 3.0MPa, working medium water, interface size are set according to GB2501 standards
Meter.
Fig. 6 is seen according to above-mentioned requirements design flexibility connection pipe joint.
According to interface size design bump joint part, framework material adopts impregnation aromatic polyamide cord, the inside and outside pressure ring patch of joint
Conjunction face completes, after body cladding operation, to install metal joint part, by skeleton according to technological design using the process of special adhesive
Material layer digs brushing adhesive, and clamping is compressed between inside and outside pressure ring and with special tooling, so as to ensure that flexibility connects after sulfuration
The anti-pulling-and-doffing performance of pipe joint.
Butt joint part stressing conditions are analyzed:
1) under working condition, flexibility connection pipe pressurising 3.0MPa, when safety coefficient is designed as 3 times of rated operating pressures, effect
Power in body unit length is:F=3PS=3 × 3.0MPa × (π × 250mm × 1mm)=7065N, i.e. unit length pipe
Body stress about 7.07kN/mm;
2) aromatic polyamide cord specification be 1670dtex/1 × 3, its elongation at break about 4%, pull apart strength about 750N, stretching die
Amount 780cN/dtex, elastic modelling quantity 120GPa, cord winding angle are 54.4 °, and the cord number of plies is 4 layers, and flexibility connection pipe reaches peace
Under times rated operating pressure effect of overall coefficient, i.e., 3, body axial direction maximum distortion about 2.9mm, axial deformation about 2.5mm, here make
Under firmly, 0.85kN/mm is about to pulling force suffered by monolayer framework material;
3) with reference to joint design size (Fig. 6), inside and outside pressure ring binding face is the lip/recess with certain angle
Structure, after framework material pressing locking, pulling force suffered by framework material is can be analyzed to perpendicular to oblique in lip/recess pressing position
The normal force in face and the tangential force along bevel direction, tangential force here can be considered the pull-off that joint location framework material is subject to
Power, carries out force analysis to the position framework material, calculate monolayer framework material suffered by pull-out force be about 0.61kN/mm;
4) by experimental test, treated rubber is 22kN/m, framework material and rubber with the bonding strength of metal
Bonding strength be 13kN/m (H extractions);
5), after the fastening of 12-M24 bolts, bolt pretightening is approximately self-locking action power of the inside and outside pressure ring to aromatic polyamide cord:P0
=σ 0As=0.5 σ sAs=0.5 × 640N/mm2 × 353mm2=112960N ≈ 113kN;P0 is pretightning force, and σ s are spiral shell
Stricture of vagina performance rate, calculated diameters of the As for threaded portion weak section.
6) framework material is by inside and outside pressure ring clamping partial-length about 60mm, therefore pull-out force suffered by monolayer framework material is about
37kN, clamping part adhesion of rubber to metal intensity are about 1.32kN, and framework material is about 0.78kN with rubber adhesion intensity,
Inside and outside pressure ring is about 113kN to the self-locking action power of cord.
As can be seen here, bonding force suffered by framework material and the collective effect power of self-locking action power, are far longer than flexibility connection pipe
Under 3 times of operating pressures, suffered pull-out force, analyzes from point of theory, and flexibility connection pipe in a rated operation can not pull-off.
Performance test is carried out to flexibility connection pipe preproduction workpiece:
1) rated operating pressure is pressurized to flexibility connection pipe internal water flooding, pressurize 15min, body are without exception, connector status
Well;
2) 2 times of rated operating pressures are pressurized to flexibility connection pipe, pressurize 30min, body are without exception, and connector status are good;
3) pressurising is continued to flexibility connection pipe, to 12.5MPa body explosions, joint is still remained intact after explosion, by calculating
Pull-out force F=PExplosion×π×R2Show that the de- ability of resistance to plucking is more than 60T.
4) to flexibility connection pipe with 50~60 times/min of cycle, 0~1.33 times of rated operating pressure carries out pressure pulse test,
After the test of 400000 subpulses, body is without exception, and connector status are good;
5) rated operating pressure is pressurized to flexibility connection pipe internal water flooding, one end is fixed, the other end is with the axial position of 24mm
Move, the axial displacement of 20mm is carried out stretching, compressed, after respectively carrying out 20 extreme displacement complementation tests, body is without exception, nipple
State is good;
6) axial tension, the compression of 12mm under rated operating pressure, are carried out, 1500 connector status is respectively carried out good.
7) radial shear 1500 times of 10mm under rated operating pressure, is carried out, connector status are good.
Flexibility connection pipe joint design reliability is axially withheld by experimental test to verify to self-locking, the joint design
Impacted under the various operating modes such as displacement, internal pressure pulse, by tensile and compress, radial shear, and all directions
Good anti-pulling-and-doffing performance and sealing are can guarantee that, with high security reliability, conventional flex union nipple is fully met
Install and use requirement.
In sum, self-locking described in the utility model axially withhold flexibility connection pipe joint design have it is rational in infrastructure, system
Make the de- ability of process is simple, resistance to plucking it is strong the advantages of, with high security reliability, and which is lightweight, and size is little, can meet little
The flexibility connection pipe installation requirements in space, and do not affect the property such as vibration damping, noise reduction, shock resistance, bit shift compensation that flexibility connection pipe has
Can require, it is adaptable to the joint design of each field flexibility connection pipe and processing and manufacturing.