CN201803023U

CN201803023U - Movable double-flange balance flexible connection pipe

Info

Publication number: CN201803023U
Application number: CN 201020137670
Authority: CN
Inventors: 周相荣; 丁炜; 王强
Original assignee: 704th Research Institute of CSIC
Current assignee: 704th Research Institute of CSIC
Priority date: 2010-03-19
Filing date: 2010-03-19
Publication date: 2011-04-20
Anticipated expiration: 2020-03-19

Abstract

The utility model relates to a movable double-flange balance flexible connection pipe, which mainly aims to increase the tensile strength and the high pressure resistance. The connection pipe adopts the technical scheme that a seal ring is arranged at each end of the flexible pipe, a stepped groove for accommodating the main flange of the flexible pipe is formed on the seal ring, and a sealing groove corresponding to an external flange is formed on the front end surface of the seal ring. The movable double-flange balance flexible connection pipe is suitable for the connection of high-pressure bearing fluid with good balance.

Description

Movable two flange balance flexibility connection pipe

Technical field:

The utility model relates to the adjustable connection of a kind of pipe fitting, particularly a kind ofly comprises flexible connection.

Background technique:

In industry, fields such as communications and transportation, in order to eliminate or to reduce pipeline transmitting vibrations and noise, extensively adopt flexibility connection pipe, and general flexibility connection pipe can produce axial deformation, bring 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, be 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, and steel wire is wrapped on the interior structure spare, rely on the flange installing force that it is locked, make pipe fitting have good anti-pull-off performance, this structural disadvantages is that balance is relatively poor, joint dimension, weight and rigidity are bigger, 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 by interior, form with middle three flanges and separation sleeve outward, body is under the working pressure effect, the winding angle of the resultant direction of its circumferential and axial stress and framework material aramid line overlaps, can compensate the influence that produces because of the aramid line elongation percentage, the axial deformation of body is gone to zero, well balanced property of tool and resistance to plucking take off ability, but this structure is installed difficulty because three flange structures are difficult for centering when pipeline is installed, and the winding angle that influences the wrap wire of aramid line in the flexible tube for installation thus changes its balance is descended; At this, the dealer proposes a kind of " movable flange self-balanced flexible connection tube ", 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 a trapezoid cross section stiffening ring, the flexibility connection pipe two ends are flange shape, be arranged with a movable adpting flange respectively in this flange inner, 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, but the external flange of this moment must be made 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 may influence displacement compensation capability and damping property that this pipeline connects.

The model utility content:

Technical problem to be solved in the utility model, 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 technical scheme in the invention for solving the above technical problem 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 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: at the one-body molded respectively seal ring that a tool odd-shaped cross section is arranged in the two end part of flexible tube, sealing ring rear side digs and is provided with a dovetail groove, be equipped with flexible tube in this dovetail groove and be the main flange of trapezoid cross section, the front-end face of sealing ring digs and is provided with one and 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, after making things convenient for centering, the flexibility connection pipe flange of kink and external flange be connected and fixed with bolt, 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 utility model adopts the scheme of the seal ring combination of flexible tube trapezoid cross section master's flange and rigidity, when the flexibility connection pipe pressurising is worked, partial high pressure is set up in the cooperation place, dovetail groove rear end of main flange and seal ring, the sealability of joint is increased substantially, after flexible tube and the rigid sealing ring combination, the tensile strength of flexibility connection pipe is obviously improved, 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 (as 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 movable two flange balance flexibility connection pipe vertical profiles of the utility model 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 and external flange 4 can be achieved a butt joint by bolt.

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 made 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 determined 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 utility model 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, main flange 14 is the extended structures that cooperate section 13, stiffening ring 15 and main flange 14 are one-body molded, stiffening ring 15 is made 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, the body 11 of this flexible tube 1 is extended with a changeover portion 16 in main flange 14 inboards, the front end of this changeover portion 16 is one-body molded flange 17, changeover portion 16 is the extended structures that cooperate the rubber mass body of section 13, the internal diameter of changeover portion 16 is identical with body 11 internal diameters and external flange latus rectum, be 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, it is the internal diameter of the body 11 of flexible tube 1, cooperate the internal diameter of section 13 identical, form the latus rectum of movable two flange balance flexibility connection pipes jointly with the internal diameter of changeover portion 16;

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.

Seal ring 2, it is one of distinctive member of the utility model, be separately positioned on the two ends and the integrated vulcanizing moulding of flexible tube 1, the odd-shaped cross section ring bodies that can make by steel or other similar materials, as shown in Figure 3, having the seal groove 21 of an annular to dig is located on the front-end face 22, when with external flange 4 butt joints, can in sealing groove 21, insert cyclic sealing gasket 5 (as Fig. 1) with the flute profile correspondence, sealing pad 5 can be made by steel, Zhi matter or other similar materials, and selects suitable material with the size of pipeline working pressure; Sealing ring 2 inboards are dug respectively and are provided with inverted draw cut 23 and inner ring surface 24, and inverted draw cut 23 digs the center that is located at top end 21, and its size and dimension all flange 17 with flexible tube 1 is corresponding identical, is equipped with flange 17 in this inverted draw cut 23;

Inner ring surface

24 and 23 corresponding connections of inverted draw cut, this face changeover portion 16 proper and flexible tube 1 amplexiforms, and is equipped with changeover portion 16 in this inner ring surface 24, and forms the rigid type bearing of changeover portion 16; Dovetail groove 25 is to dig the trapezoid cross section circular groove that is located at ear end face 26, and dovetail groove 25 is main flange 14 corresponding matching that contain stiffening ring 15 with flexible tube 1, forms the two ends rigid supporting structure of flexible tube 1; In the appropriate position of outer ring surface 28 proximal end faces 26 of seal ring 2, dig and be provided with a location convex shoulder 27, in order to the radial location between seal ring 2 and the flexible tube flange 3, install in order to the butt joint of the stress of improving each connector element and convenient two flanges.

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 the through hole 32 that circumferentially offers a group and external flange 4 correspondences 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, and promptly the distance between the groove bottom 34 of the ear end face 26 of sealing ring 2 and flexible tube flange 3 is at least 2 millimeters; The inner ring surface 34 of flexible tube flange 3 and the cooperation section of flexible tube 1 13 periphery correspondences are and are slidingly matched, be that flexible tube flange 3 can rotate relative to flexible tube 1, 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 utility model 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, seal groove 21 corresponding matching of the sealing convex shoulder 41 of external flange 4 and seal ring 2, can adopt simultaneously conventional sealing gasket 5, form the external flange face 42 of external flange 4 and the rigidity contact seal of seal ring 2, 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 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 a seal ring (2) 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 flange (17), sealing ring (2) inboard is dug respectively and is provided with inverted draw cut (23) and inner ring surface (24), be equipped with flange (11) in this inverted draw cut (23), be 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) are one and the corresponding plane of external flange face (42) 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.

5. the two flange balance flexibility connection pipes of activity according to claim 1, after it is characterized in that the assembling of flexible tube flange (3) and external flange (4), at least 2 millimeters of the distances between the ear end face (26) of sealing ring (2) and the groove bottom (34) of flexible tube flange (3).

6. the two flange balance flexibility connection pipes of activity according to claim 1, it is characterized in that the body (11) of flexible tube (1) internal diameter, cooperate the internal diameter of section (13) identical with the internal diameter of changeover portion (16), form the latus rectum of movable two flange balance flexibility connection pipes jointly.