CN102192374B

CN102192374B - Movable dual-flange balanced flexible connecting pipe

Info

Publication number: CN102192374B
Application number: CN 201010129592
Authority: CN
Inventors: 周相荣; 丁炜; 王强
Original assignee: 704th Research Institute of CSIC
Current assignee: SHANGHAI CSIC SHIP PROPULSION EQUIPMENT CO., LTD.
Priority date: 2010-03-19
Filing date: 2010-03-19
Publication date: 2012-12-26
Anticipated expiration: 2030-03-19
Also published as: CN102192374A

Abstract

The invention relates to a movable dual-flange balanced flexible connecting pipe, which mainly resolves technical problems such as increasing of tensile strength and high pressure resistance, wherein a technical scheme adopted by the invention is as follows: two ends of a flexible pipe are respectively provided with a sealing ring, and a trapezoidal groove for accommodating a flexible pipe main flange is arranged on each sealing ring; and the front end face of each sealing ring is provided with a sealing groove corresponding to an external flange. The movable dual-flange balanced flexible connecting pipe is applicable to the connection needing to bearing high-pressure fluid and having good balance.

Description

Movable two flange balance flexibility connection pipe

Technical field:

The present invention relates to the adjustable connection of a kind of pipe fitting, particularly a kind ofly comprise flexible connection.

Background technique:

In fields such as industry, communications and transportation,, extensively adopt flexibility connection pipe in order to eliminate or to reduce pipeline transmitting vibrations and noise; And general flexibility connection pipe can produce axial deformation, brings harmful additional force and displacement for the pipeline or the equipment that are connected, for this reason; People propose the technological scheme of self-balanced flexible connection tube, are characterized under the condition of pipeline load axial displacement and corresponding reaction force that its pipeline that is connected of balance or equipment produce; More typical structure as with in load the reinforced stock pipe of firmware formula joint, its framework layer adopts steel wire to twine, and loads the firmware formula in joint is adopted as; Steel wire is wrapped on the interior structure spare, relies on the flange installing force that it is locked, and makes pipe fitting have good anti-pull-off performance; This structural disadvantages is that balance is relatively poor; Joint dimension, weight and rigidity are bigger, and displacement compensation capability is little, the vibration and noise reducing poor performance; Another structure is existing product " adapter of balanced type rubber damping " and " balanced type metal bellows ", is to adopt to add limit structure in the hope of balance, and its balance is poor, and its limit structure also makes its displacement compensation capability reduce; Another structure is " three flange structure self-balancing type flexibility connection pipes "; Be characterized in forming by inside and outside and middle three flanges and separation sleeve; Body is under the working pressure effect, and the winding angle of the resultant direction of its circumferential and axial stress and framework material aramid line overlaps, and can compensate the influence that produces because of the aramid line elongation percentage; The axial deformation of body is gone to zero; Tool well balanced property and resistance to plucking take off ability, but this structure when pipeline is installed because three flange structures are difficult for the centering difficult installation, and the winding angle that influences the wrap wire of aramid line in the flexible tube for installation thus changes its balance is descended; To this, the dealer proposes a kind of " movable flange self-balanced flexible connection tube ", and this scheme is except that adopting above-mentioned fiber reinforcement helical layer formula winding structure characteristics; Its flexibility connection pipe two ends are one-body molded to have a trapezoid cross section stiffening ring; The flexibility connection pipe two ends are flange shape, are arranged with a movable adpting flange respectively in this flange inner, and its special flanged structure improves the carrying condition of flexibility connection pipe; Movable adpting flange fundamentally solves the defective that described three flange structures exist; But this scheme is utilized the assembling pressure of flange shape end of flexibility connection pipe and external steel flange to be applied directly on the two mating face and is formed sealing load, though can save the Sealing of conventional usefulness, the external flange of this moment must be processed corresponding shape and necessary degree of finish; The technical requirements that pipeline is installed improves; And can increase cost, as install and use improperly, also possibly influence displacement compensation capability and damping property that this pipeline connects.

Summary of the invention:

Technical problem to be solved by this invention; Provide a kind of improved activity two flange balance flexibility connection pipes, it can increase substantially the tensile strength and the anti-high-pressure tightness of flexibility connection pipe, can keep well balanced property again; And can adopt external flange simple in structure, conveniently promote the use of.

The technological scheme that the present invention solves the problems of the technologies described above employing is: movable two flange balance flexibility connection pipes include flexible tube, seal ring, flexible tube flange and external flange; The main flange of flexible tube two ends is one-body molded respectively to have a trapezoid cross section stiffening ring; The rear side of the main flange of flexible tube two ends is arranged with a flexibility connection pipe flange respectively; Be between flexible tube and the flexibility connection pipe flange and be slidingly matched; Be characterized in: the one-body molded respectively seal ring that a tool odd-shaped cross section is arranged at the two end part of flexible tube; Sealing ring rear side digs and is provided with a dovetail groove, is equipped with the main flange that flexible tube is the trapezoid cross section in this dovetail groove, the front-end face of sealing ring dig be provided with one with the seal groove of the sealing convex shoulder corresponding matching of external flange.When being linked and packed; Can place packing ring in the seal groove of seal ring; The flexibility connection pipe flange of kink be connected with bolt after external flange makes things convenient for centering fixing; Its sealing engagement state is connected identical with common pipeline flange, the cooperation of the dovetail groove of odd-shaped cross section seal ring and flexible tube master flange can form the tension strength and the sealing of distinctive good resistance high pressure under the effect of high-pressure liquid.

The scheme that the present invention adopts the seal ring of flexible tube trapezoid cross section master's flange and rigidity to combine, when the flexibility connection pipe pressurising was worked, partial high pressure was set up in the cooperation place, dovetail groove rear end of main flange and seal ring; The sealability of joint is increased substantially; Flexible tube and rigid sealing ring can make the tensile strength of flexibility connection pipe obviously improve after combining, and can make the mating face of flexible tube and external flange be the positive engagement face again; Be the connection of common piping flange; Only need add plain washer (like steel or papery), just can guarantee high pressure sealing, simplify the making of special procuring structure of a large amount of external flanges in each piping greatly; Both make things convenient for the user, also can significantly reduce equipment cost.

Description of drawings:

Fig. 1 is that the two flange balance flexibility connection pipe vertical profiles of activity of the present invention are looked schematic representation.

Fig. 2 is that cross-sectional schematic is amplified in the part of an end among Fig. 1.

Fig. 3 is the local cross-sectional schematic of amplifying of seal ring among Fig. 1.

Embodiment:

With reference to Fig. 1; Movable two flange balance flexibility connection pipe includes flexible tube 1, seal ring 2, flexible tube flange 3 and external flange 4; The two ends of flexible tube 1 are respectively arranged with a seal ring 2 and are arranged with a flexible tube flange 3, and wherein flexible tube flange 3 can be achieved a butt joint by bolt with external flange 4.

Flexible tube 1 includes body 11, framework layer 12, cooperates section 13, main flange 14, stiffening ring 15, changeover portion 16 and flange 17, and its two-end structure symmetry is identical, wherein:

Body 11 is tubular bodies of being processed by conventional rubber;

Framework layer 12 is and body 11 integrated enhancing structures that its material can be aramid fibre or steel wire, and takes over the winding angle that balance, fiber strength and adapter stiffness analysis are confirmed fiber with the best;

Cooperating section 13, is the extended structure at body 11 two ends, and its periphery is provided with the flange arrangement of a loop type, promptly forms of the present invention pair of flange arrangement, cooperates the internal diameter of section 13 identical with the internal diameter of body 11;

Main flange 14 and stiffening ring 15; Its two-end structure is identical, and main flange 14 is the extended structures that cooperate section 13, and stiffening ring 15 and main flange 14 are one-body molded; Stiffening ring 15 is processed by steel or other similar materials; The sectional shape of stiffening ring 15 is trapezoidal, and main flange 14 is identical with its shape, and fitted seal ring 2 can form distinctive high pressure sealing characteristic;

Changeover portion 16 and flange 17; Changeover portion 16 is the extended structures that cooperate the rubber mass body of section 13, and the internal diameter of changeover portion 16 is identical with body 11 internal diameters and external flange latus rectum, is two flange balance flexibility connection pipes of maintenance activity and the unobstructed peculiar structure of external flange runner; Existing structure is that to keep runner unobstructed be the structure that adopts the overhanging water conservancy diversion of external flange; Not only make external flange can not adopt conventional structure, cause and use inconvenience, and can increase maintenance expense; The setting of flange 17 then is for more favourable water conservancy diversion, can guarantee that also changeover portion 16 can be fitted in seal ring 2 better;

The flexible tube 1 that has main flange 14, stiffening ring 15 and kink flexible tube flange 3; Its body 11, framework layer 12, cooperation section 13, main flange 14, stiffening ring 15, changeover portion 16, flange 17 and seal ring 2 integrated vulcanizing moulding; In the forming process respectively kink be provided with two flexible tube flanges 3; Can adopt advanced sulfuration process and corresponding mould, with elasticity and the intensity of guaranteeing vulcanized rubber.

Sealing ring 2, which is unique to one of the members of the present invention, respectively disposed at both ends of the flexible tube 1 and the integrally vulcanization molded, can be made of steel or other similar material of the modified cross-section annular body, shown in Figure 3, The seal has an annular groove 21 arranged at the front end surface 22 of the cut, when the flange 4 and the external docking can be built into the seal groove 21 and the annular groove corresponding to the gasket 5 (Figure 1), the sealing pad 5 may be steel, or other similar material quality Zhi made, and the size of the working pressure duct to select the appropriate material; top groove 23, the groove 21 cut in the center of the top surface, and both the size and shape of the flexible tube 1 correspond to the same flange 17; inner surface 24 and a top groove 23 corresponding to the connection, the surface and the flexible tube 1 just transition section 16 connected, and the transition section 16 to form a rigid supporting surface; trapezoidal groove 25 is set to dig the rear end surface 26 of trapezoidal cross-section annular groove, the trapezoidal groove 25 is rigid and the flexible tube 1 containment ring 15 corresponds with the primary flange 14 formed at both ends of the flexible tube 1 a rigid support structure; outer ring of the seal ring 2 the proximal surface 26 of face 28 at a suitable position, digging a positioning shoulder 27 a to seal ring 2 and the flexible tube between the radial positioning of the flange 3, to facilitate the improvement of the connecting member of the stress state and convenience two flange butt installation.

Flexible tube flange 3, its structure fundamental sum existing structure is similar, and flange body 31 when stretching through after the bolt group of through hole is fastening, can be connected flexible tube 1 and seal ring 2 on the pipeline along circumferentially offering one group of through hole 32 corresponding with external flange 4 reliably; Dig in the inboard of the front end of flexible tube flange 3 and through hole 32 and to be provided with a locating slot 33; The location convex shoulder 27 of this locating slot 33 and seal ring 2 is the location and cooperates (transition fit); Maintain clearance distance between the groove bottom 34 of this locating slot 33 and the flexibility connection pipe flange 3, this distance is at least 2 millimeters; The inner ring surface 34 of flexible tube flange 3 is with the cooperation section 13 periphery correspondences of flexible tube 1 and is slidingly matched; It is flexible tube flange 3 flexible tube 1 rotation relatively; Form a kind of loose flange type structure; The centering of each through hole 32 and external flange 4 through holes during both convenient the installation can not broken its balance of ring owing to centering twists flexible tube again.

External flange 4; Because the peculiar structure that the present invention adopts flexible tube 1 and seal ring 2 to form; External flange 4 can be made into and the existing identical structure of common flange; Bring great convenience to the user, the sealing convex shoulder 41 of external flange 4 and seal groove 21 corresponding matching of seal ring 2 can adopt conventional sealing gasket 5 simultaneously; Form the rigidity contact seal of the external flange face 42 and the seal ring 2 of external flange 4, this sealing configuration converts the end face special state of balance flexibility connection pipe to common two rigid flange linkage structures.

Claims

1. two flange balance flexibility connection pipes of an activity; Include flexible tube, seal ring, flexible tube flange and external flange; The main flange of flexible tube two ends is one-body molded respectively to have a trapezoid cross section stiffening ring; The rear side of the main flange of flexible tube two ends is arranged with a flexible tube flange respectively; Be between flexible tube and the flexible tube flange and be slidingly matched, it is characterized in that: be provided with the seal ring (2) of a tool odd-shaped cross section respectively at the two end part of flexible tube (1), sealing ring (2) rear side digs and is provided with a dovetail groove (25); Be equipped with flexible tube (1) in this dovetail groove (25) and be the main flange (14) of trapezoid cross section, the front-end face (22) of sealing ring (2) digs and is provided with one and the seal groove (21) of external flange (4) sealing convex shoulder (41) corresponding matching.

2. the two flange balance flexibility connection pipes of activity according to claim 1; The body (11) that it is characterized in that this flexible tube (1) is extended with a changeover portion (16) in main flange (14) inboard; The front end of this changeover portion (16) is one-body molded to have flange (17); Sealing ring (2) inboard is dug respectively and is provided with inverted draw cut (23) and inner ring surface (24), is equipped with flange (17) in this inverted draw cut (23), is equipped with changeover portion (16) in this inner ring surface (24).

3. the two flange balance flexibility connection pipes of activity according to claim 1, the front-end face (22) that it is characterized in that sealing ring (2) be one with the plane of external flange face (42) correspondence of external flange (4).

4. the two flange balance flexibility connection pipes of activity according to claim 1; The outer ring surface (28) that it is characterized in that sealing ring (2) locates to be provided with location convex shoulder (27) at nearly ear end face (26); Dig at the front end of flexible tube flange (3) and to be provided with locating slot (33), this location convex shoulder (27) and this locating slot (33) are the location and cooperate.