CN203297836U

CN203297836U - Balanced type expansion joint with compact structure

Info

Publication number: CN203297836U
Application number: CN2013203337709U
Authority: CN
Inventors: 宋红伟; 宋学军; 王海滨; 郑群
Original assignee: QINHUANGDAO NORTH METAL HOSE CO Ltd
Current assignee: QINHUANGDAO NORTH METAL HOSE CO Ltd
Priority date: 2013-06-09
Filing date: 2013-06-09
Publication date: 2013-11-20
Anticipated expiration: 2023-06-09

Abstract

A balanced type expansion joint with a compact structure comprises a balanced corrugated pipe, a first work corrugated pipe and a second work corrugated pipe. A first end plate is welded on an outer side end pipe of the first work corrugated pipe, and a first annular plate is welded on an inner side end pipe of the first work corrugated pipe; a second end plate is welded on an outer side end pipe of the second work corrugated pipe, and a second annular plate is welded on an inner side end pipe of the second work corrugated pipe; a first auxiliary hinge plate is welded on a first end plate, the first auxiliary hinge plate is hinged to a first main hinge plate, and the second annular plate is welded to an end portion of the first main hinge plate; a second auxiliary hinge plate is welded on a second end plate, the second auxiliary hinge plate is hinged to a second main hinge plate, and the first annular plate is welded to an end portion of the second main hinge plate; the first annular plate is welded to a left end pipe of the balanced corrugated pipe, and the second annular plate is welded to a right end pipe of the balanced corrugated pipe. The balanced type expansion joint is used for compensating axial direction displacement and transverse direction displacement for an L-shaped pipeline and balancing pressure. Compared with the prior art, the balanced type expansion joint has the advantages of being capable of greatly reducing structure space, small in appearance size, complete in function, flexible in installation, capable of meeting pipeline space small size demands, and the like.

Description

A kind of balanced expansion joint of compact structure

Technical field

The utility model relates to the balanced expansion joint of a kind of expansion joint, particularly a kind of compact structure, belongs to the pipe fitting technical field.

Background technique

Expansion joint is to utilize the dilatation of bellows to come the extraction duct system by expanding with heat and contract with cold etc. former thereby producing the compensating element of dimensional changes, can extraction duct displacement and vibration, and balanced action power, reduce noise.In industrial technology pipeline piping technology, process pipe is intricate, because pipe temperature, pressure change thermal stress and the physical descriptor that causes, usually needs to adopt expansion joint to be compensated.In actual applications expansion joint take compensating axial, laterally and three kinds of citation forms of angular displacement as main, be respectively used to compensate straight pipeline, Z-type pipeline and L pipeline.As pressure balanced expansion joint, be that profit makes in pipeline to press the thrust that causes to keep balance by self structure, do not act on or seldom act on connected equipment, and the bit shift compensation function of energy maintenance itself.Pressure balanced expansion joint is divided into: the straight tube balance type, and it is for the axial displacement (comprising straight-tube pressure-balance, single entry bypass type and compound bypass type) of compensation and balance straight pipeline; Universal type (being commonly called as laterally large pull bar), for compensation and balance Z-type and the ducted transverse stress of L-type; Hinge type and universal type (dividing again single entry and compound), for compensation and balance Z-type and the ducted lateral pressure of L-type.This standard type straight-pipe balance type expansion joint, all because of its structural feature, required installing space is larger, is subject to the limitation of application conditions, can not meet the specific (special) requirements of craft piping technology.If normally will use in pairs hinge type expansion joint as L-type pipeline compensating axial and lateral displacement, two hinge type expansion joints need be arranged on respectively horizontal pipeline and the vertical duct place of L-type pipeline, like this, need to take larger structure space, if pipeline is in the small size space, can't meet installation requirement.

The model utility content

The purpose of this utility model is to overcome the drawback of prior art, and a kind of balanced expansion joint for small size spatial structure compactness is provided, and described expansion joint can be used for compensating L-type pipeline axial and lateral displacement and balanced action power.

Problem described in the utility model realizes with following technical proposals:

A kind of balanced expansion joint of compact structure, its specialization is, it comprises the balance bellows and is positioned at the first work bellows of the balance bellows left and right sides, the second work bellows, first work bellows outboard end pipe seam the first end plate, first work bellows medial extremity pipe seam the first ring flat-plate; Second work bellows outboard end pipe seam the second end plate, second work bellows medial extremity pipe seam the second ring flat-plate; The secondary hinge plate of the first end plate seam first, hinged the first main hinge plate of the first secondary hinge plate, first main hinge plate end seam the second ring flat-plate; The secondary hinge plate of the second end plate seam second, hinged the second main hinge plate of the second secondary hinge plate, second main hinge plate end seam the first ring flat-plate; Balance bellows left end pipe seam the first ring flat-plate, balance bellows right-hand member pipe seam the second ring flat-plate.

The balanced expansion joint of said structure compactness, described the first main hinge plate, the second main hinge plate are positioned at same plane, the first main hinge plate is fork-shaped, the first main hinge plate is provided with U-groove bevel near balance bellows side, the second main hinge plate is rectangle, and the second main hinge plate is positioned at U-groove bevel near balance bellows side.

The balanced expansion joint of said structure compactness, the monolateral lateral clearance of the bi-side of described the second main hinge plate and U-groove bevel is the 15-20 millimeter, the axial clearance 20-30 millimeter of the second main hinge plate end face and U-groove bevel bottom.

The balanced expansion joint of said structure compactness, be the plane of parallel the second main hinge plate with the welding part of the second main hinge plate on described the first ring flat-plate, on the second ring flat-plate, with the welding part of the first main hinge plate, is the plane of parallel the first main hinge plate.

The utility model is single for common balanced expansion joint effect, be used in conjunction with and take the problem that structure space is large and improve, and a kind of balanced expansion joint with compact structure of brand new is provided.Described expansion joint comprises two work bellowss, balance bellows with end plate, major-minor hinge plate and is connected bearing pin, above-mentioned member, by ingenious combination, has formed a kind of compensating axial displacement, balanced action power function of existing straight pipe pressure-balancing type expansion joint; The equilibrium swelling joint that two single entry planar hinge chain expansion joint offset angle displacement functions are arranged again.Described expansion joint can be used for the L-type pipeline, compensating axial and lateral displacement and balance pressure, it can be according to the structure space of L-type pipeline, selection is arranged on horizontal pipeline or the vertical duct of L-type pipeline, greatly reduce structure space, have boundary dimension little, function is complete, flexible for installation, can meet the characteristics such as pipeline space small size requirement.

The accompanying drawing explanation

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is the utility model structural representation;

Fig. 2 is the A-A sectional view of Fig. 1;

Fig. 3 is the ring flat-plate schematic diagram.

in figure, each list of reference numerals is: 1, the first work bellows outboard end pipe, 2, the first end plate, 3, the first secondary hinge plate, 4, the first work bellows, 5, the first main hinge plate, 5-1, U-groove bevel, 6, the first work bellows medial extremity pipe, 7, the first ring flat-plate, 8, balance bellows left end pipe, 9, the balance bellows, 10, balance bellows right-hand member pipe, 11, the second ring flat-plate, 12, the second work bellows medial extremity pipe, 13, the second work bellows, 14, the second main hinge plate, 15, the second secondary hinge plate, 16, the second work bellows outboard end pipe, 17, the second end plate.

Embodiment

Referring to Fig. 1, Fig. 2, the utility model is the balanced expansion joint of compact structure, and it comprises balance bellows 9, and the left side of balance bellows arranges the first work bellows 4, and the right side of balance bellows arranges the second work bellows 13.First work bellows outboard end pipe 1 place seam the first end plate 2, first work bellows medial extremity pipe 6 seam the first ring flat-plates 7; Second work bellows outboard end pipe 16 places seam the second end plate 17, second work bellows medial extremity pipe 12 places seam the second ring flat-plate 11.The secondary hinge plate of the first end plate secondary hinge plate 3, the first of 2 seam first strides across balance bellows 9, its right part and the second ring flat-plate 11 seam by hinged the first main hinge plate 5, the first main hinge plates of bearing pin; Hinged the second main hinge plate 14, the second main hinge plates of the secondary hinge plate of the second end plate secondary hinge plate 15, the second of 17 seam second stride across balance bellows 9, its left part seam first ring flat-plate 7.The middle part seam of balance bellows left end pipe 8 and the first ring flat-plate 7, the middle part seam of balance bellows right-hand member pipe 10 and the second ring flat-plate 11.

Still referring to Fig. 1, Fig. 2, the first main hinge plate 5, the second main hinge plate 14 are positioned at same plane, and wherein, the first main hinge plate 5 is fork-shaped, and the first main hinge plate is provided with U-groove bevel 5-1 near balance bellows side; The second main hinge plate 14 is rectangle, and the second main hinge plate is positioned at the U-groove bevel of the first main hinge plate near balance bellows side.For guaranteeing that described expansion joint does not produce interference between two main hinge plates when the compensate for displacement, each side of the second main hinge plate 14 and U-groove bevel 5-1 leave respectively the lateral clearance of 15-20 millimeter, and the axial clearance of 20-30 millimeter is left in the second main hinge plate left end and U-groove bevel bottom.

Firm for guaranteeing welding, on the first ring flat-plate 7, with the welding part of the second main hinge plate 14, be the plane of parallel the second main hinge plate, on the second ring flat-plate 11, with the welding part of the first main hinge plate 5, be the plane of parallel the first main hinge plate.The first ring flat-plate, the second ring-plane structure are identical, and Fig. 3 is the schematic diagram of the first ring flat-plate.

The utility model can be used for the L-type pipeline, compensating axial and lateral displacement and balanced action power, it can be according to the structure space of L-type pipeline, selects to be arranged on horizontal pipeline and the vertical duct of L-type pipeline, generally selects to be arranged on horizontal pipeline or vertical duct in the two on long pipeline.The balance bellows, in overall structure, is namely brought into play balanced action, plays again the effect of omnipotent equilibrium swelling joint intervalve.During described expansion joint absorption tube linear displacement, suppose that left end fixes, expansion joint is compressed, the first work bellows 4 of balance bellows 9 left ends is compressed, by the first main hinge plate 5, make the balance bellows be stretched, the compensating axial displacement, at this moment described expansion joint is the same with the effect of normal straight tube pressure balanced expansion joint.In first, second main hinge board plane, described expansion joint is quite a compound flat transverse hinge type expansion joint, middle balance bellows is equivalent to the intervalve of multiple hinge type expansion joint, just this intervalve is the middle adapter that can stretch at length direction, by the angular distortion of first, second work bellows of two ends, expansion joint reaches the effect that absorbs the pipeline lateral displacement.

Claims

1. the balanced expansion joint of a compact structure, it is characterized in that, it comprises balance bellows (9) and is positioned at the first work bellows (4) of the balance bellows left and right sides, the second work bellows (13), first work bellows outboard end pipe (1) seam the first end plate (2), first work bellows medial extremity pipe (6) seam the first ring flat-plate (7); Second work bellows outboard end pipe (16) seam the second end plate (17), second work bellows medial extremity pipe (12) seam the second ring flat-plate (11); The first end plate (2) seam the first secondary hinge plate (3), hinged the first main hinge plate (5) of the first secondary hinge plate, first main hinge plate end seam the second ring flat-plate (11); The second end plate (17) seam the second secondary hinge plate (15), hinged the second main hinge plate (14) of the second secondary hinge plate, second main hinge plate end seam the first ring flat-plate (7); Balance bellows left end pipe (8) seam the first ring flat-plate (7), balance bellows right-hand member pipe (10) seam the second ring flat-plate (11).

2. the balanced expansion joint of compact structure according to claim 1, it is characterized in that, described the first main hinge plate (5), the second main hinge plate (14) are positioned at same plane, the first main hinge plate (5) is fork-shaped, the first main hinge plate is provided with U-groove bevel (5-1) near balance bellows side, the second main hinge plate (14) is rectangle, and the second main hinge plate is positioned at U-groove bevel near balance bellows side.

3. the balanced expansion joint of compact structure according to claim 2, it is characterized in that, the monolateral lateral clearance of the bi-side of described the second main hinge plate (14) and U-groove bevel (5-1) is the 15-20 millimeter, the axial clearance 20-30 millimeter of the second main hinge plate end face and U-groove bevel bottom.

4. the balanced expansion joint of compact structure according to claim 3, it is characterized in that, described the first ring flat-plate (7) is upper is the plane of parallel the second main hinge plate with the welding part of the second main hinge plate (14), and the second ring flat-plate (11) is upper is the plane of parallel the first main hinge plate with the welding part of the first main hinge plate (5).