CN201293181Y

CN201293181Y - Direct-burried double-insurance corrugation compensator

Info

Publication number: CN201293181Y
Application number: CNU2008202189573U
Authority: CN
Inventors: 刘君
Original assignee: SHENYANG AVIC LIMING MACHINERY MANUFACTURE CO Ltd
Current assignee: SHENYANG AVIC LIMING MACHINERY MANUFACTURE CO Ltd
Priority date: 2008-11-06
Filing date: 2008-11-06
Publication date: 2009-08-19
Anticipated expiration: 2018-11-06

Abstract

The utility model provides a direct-buried double-insurance corrugated expansion joint belonging to the field of compensating mechanisms of direct-buried pipelines and comprising a corrugated pipe which connects a front end pipe and a rear end pipe to form a passage. The corrugated expansion joint is characterized in that a casing is arranged outside the corrugated pipe and covers the corrugated pipe in a sealed way; and the device solves the problem that the previous corrugated expansion joint is easy to erode by surface water, the corrugated pipe has short service life, and a whole pipeline is out of work once the corrugated pipe is out of work. Under the condition that the corrugated pipe plays a role of protecting the pipeline and the added casing plays a role of double protection on the pipeline, the utility model has simple structure and advanced performance, thereby being beneficial to application in wide areas.

Description

Direct-burried dual fail-safe FlexbleJoint

Technical field:

The utility model relates to a kind of compensation device of directly buried pipeline, especially a kind of FlexbleJoint of direct-burried dual fail-safe.

Background technique:

At present, the explosion-proof means of having used in the compensation field of directly buried pipeline of interior pressure are mainly corrugated expansion joint, this compensator has a more significant effect for interior pressure is explosion-proof, but this corrugated expansion joint is corroded by surface water easily and causes the bellows life-span to reduce, in case and bellows lost efficacy, to can cause pressing in the whole pipeline explosion prevention function to lose efficacy equally, produce potential safety hazard, and cause internal liquid outwards to reveal simultaneously.

Summary of the invention:

Goal of the invention: the purpose of this utility model is to have solved in the past corrugated expansion joint and is corroded by surface water easily and cause the bellows life-span to reduce even lost efficacy, thus the problem that causes whole pipeline to lose efficacy.

Technological scheme: the utility model is achieved through the following technical solutions:

A kind of direct-burried dual fail-safe FlexbleJoint, bellows connects front tube and rear end pipe forms path in this device, it is characterized in that: be outside equipped with shell at bellows, shell covers bellows is airtight.

Shell is divided into outer tube, flange plate and back end ring; Flange plate and back end ring are separately positioned on the two ends of outer tube, and flange plate is fixedly installed on the front tube, and back end ring is arranged on the rear end pipe.

Back end ring is temporary fixed by the screw rod that is arranged on the support, and front tube is fixed by supporting rib.

Form an annular skewed slot at back end ring and rear end pipe contacting point around one week of rear end pipe; The opening of skewed slot is towards the outside of outer tube; Skewed slot inwardly shrinks gradually along opening; Be provided with the seal ring that shape adapts with it in skewed slot, seal ring is outside equipped with gland, and gland is by being bolted on the end ring of back, and gland compresses seal ring.

Advantage and effect: the utility model provides a kind of direct-burried dual fail-safe FlexbleJoint, this device solves in the past corrugated expansion joint corroded by surface water easily and cause the bellows life-span to reduce and in case the problem that lost efficacy and just will cause whole pipeline to lose efficacy; Adopt mode in this device at bellows place cover shell, with the bellows sealing in the enclosure, this structure can guarantee the normal operation of pipeline under the situation that bellows lost efficacy, this shell can prevent the erosion of surface water to bellows simultaneously, increases the working life of bellows; The mode that the shell of this device can adopt outer tube to add flange plate and back end ring also can adopt the mode of integral type, and when adding the mode of flange plate and back end ring, the employing outer tube with seal ring it is sealed in the place that the back end ring contacts with rear end pipe, seal ring is arranged in the skewed slot, this skewed slot is the mode of inwardly shrinking gradually along opening end, like this seal ring is arranged on the inside, can realizes the effect that seals better; The structure of this device has played under the prerequisite of the effect of protecting pipeline at bellows, the shell that increases has played the second heavily effect of protection to pipeline, in case make that also bellows damages, liquid in the pipeline can not leak yet, and can continue to guarantee the proper flow of whole pipeline under the protective action of shell; This apparatus structure is simple, advanced in performance, is beneficial to large scale application.

Description of drawings:

Fig. 1 is for showing the partial cutaway diagrammatic sketch of the utility model structure.

Embodiment:

Below in conjunction with accompanying drawing the utility model is done nearly step explanation:

As shown in Figure 1, the utility model is a kind of direct-burried dual fail-safe FlexbleJoint, includes a bellows 6 in this device, and bellows 6 connects into path with front tube 1 and rear end pipe 7, is outside equipped with shell at bellows 6, and shell covers bellows 6 sealings; Shell comprises outer tube 5, flange plate 3 and back end ring 10, and shell also can adopt the structure of integral type in addition; When adopting the structure of outer tube 5, flange plate 3 and back end ring 10, flange plate 3 and back end ring 10 are separately positioned on the two ends of outer tube 5, and flange plate 3 be arranged on the front tube 1 fixing, fixing by supporting rib 2; Back end ring 10 is arranged on the rear end pipe 7, and is temporary fixed by the screw rod 13 that is arranged on the support 14, can relatively move between back end ring 10 and the rear end pipe 7, can be along with bellows 6 because flexible the adjusting of expanding with heat and contract with cold to guarantee rear end pipe 7; Support 14 also is arranged on the rear end pipe 7, and the end of screw rod 13 is temporary fixed by nut 15 and support 14, when work support 14 is dismantled; The axial cross section of back end ring 9 is long-pending for cutting the rectangle at an oblique angle, and this shape makes back end ring 9 and rear end pipe 7 contacting points form the annular skewed slot around one week of rear end pipe; The opening of skewed slot is an i.e. side of bellows 6 dorsad towards the outside of outer tube 5; Skewed slot inwardly shrinks gradually along opening; In skewed slot, be provided with the seal ring 10 that shape adapts with it, seal ring 10 is outside equipped with gland 12, gland 12 is by being bolted on the end ring 9 of back, gland 12 compresses seal ring 10, because skewed slot inwardly shrinks gradually along opening, so when being pressed in seal ring 10 in the skewed slot, will ecto-entad more and more tighter, also be more conducive to sealing effect, seal ring 10 can adopt rubber material or plastic material, but effect is best during with the rubber material.

Be provided with the reinforcement collar 4 in the bellows 6 and the joint of front tube 1 and rear end pipe 7 to strengthen the intensity that is connected;

In outer tube 5, be provided with axial cross section long-pending for "

" guide ring 8 of shape, guide ring 8 connects outer tube 5 and rear end pipes 7.

In addition, shell also can adopt the overall structure of integral type, in the contacting point with front tube 1 or rear end pipe 7 seal ring is set then and gets final product.

Whole casing covers bellows 6 complete closed in this device, reaches with this both to prevent that surface water from corroding bellows 6, can guarantee that pipeline normally moved when bellows 6 loses efficacy again, prevents the internal liquid leakage, increases the safety coefficient of whole pipeline.

Claims

1, a kind of direct-burried dual fail-safe FlexbleJoint, bellows (6) connects front tube (1) and rear end pipe (7) formation path in this device, and it is characterized in that: be outside equipped with shell at bellows (6), shell is with airtight the covering of bellows (6).

2, direct-burried dual fail-safe FlexbleJoint according to claim 1 is characterized in that: shell is divided into outer tube (5), flange plate (3) and back end ring (9); Flange plate (3) and back end ring (9) are separately positioned on the two ends of outer tube (5), and flange plate (3) is fixedly installed on the front tube (1), and back end ring (9) is arranged on the rear end pipe (7).

3, direct-burried dual fail-safe FlexbleJoint according to claim 2 is characterized in that: back end ring (9) is temporary fixed by the screw rod (13) that is arranged on the support (14), and front tube (1) is fixing by supporting rib (2).

4, according to claim 2 or 3 described direct-burried dual fail-safe FlexbleJoints, it is characterized in that: form one around the rear end pipe annular skewed slot in (7) one weeks in back end ring (9) and rear end pipe (7) contacting point; The opening of skewed slot is towards the outside of outer tube (5); Skewed slot inwardly shrinks gradually along opening; Be provided with the seal ring (10) that shape adapts with it in skewed slot, seal ring (10) is outside equipped with gland (12), and gland (12) is by being bolted on the back end ring (9), and gland (12) compresses seal ring (10).