CN2687466Y - Insulated joint - Google Patents

Abstract

The utility model relates to an insulated joint, in particular to an insulated joint connected on the natural gas pipeline used for eliminating static electricity, preventing lightning stroke with anti-lightning action and ensuring the natural gas transportation pipeline safe used. The insulated joint comprises a couple of upper, lower ducts, and one end port position of surface to surface of the upper, lower ducts respectively protrudes outward to constitute a flange. An insulated casing whose one end is provided with a concaved cavity matched with the flange, and the other end is narrowed down a little and is sheathed on the tube body of the lower duct. A sealing cushion whose central position of the inner wall is provided with an insulated cushion slot which is embedded with an insulated complete turn, two sides of the sealing cushion are sheathed on the tube head of the upper, lower ducts, and the upper, lower ducts are separated by the insulated cushion. A sleeve is sheathed out of the flange, the sealing cushion, the insulated casing, and is provided with a blocking edge which is matched with the ektexine of one narrow end of the insulated casing. The utility model has the advantages of simple structure, easy installation and use, safety and low cost.

Description

Insulating joint

Technical field

The utility model relates to a kind of joint, and especially a kind of being used on gas pipeline of continuing eliminates static, prevents to be struck by lightning and the insulating joint of guaranteeing the safe handling of gas delivering pipe road of a lightning protection function.

Background technique

Along with rock gas uses more and more widely, for example national West-East National Gas Transmission Project of all knowing makes the people of eastern region can enjoy the next rock gas by western part conveying.The safety reliability of the pipeline of transport gas requires strict especially, except that personal factor, causes the damage factor naturally and also must consider.For example: static, thunderbolt etc. all can bring harm to air delivering pipeline.In case air delivering pipeline meets with infringement, not only influences the normal conveying of source of the gas, more and also can cause the disaster to constituting a threat to property of people's lives and properties.Therefore, when laying gas pipeline, need be on pipeline be provided with to play and eliminate static, the lightning-arrest insulating joint of effect that hits, static is introduced the earth with the protection pipe network by this insulating joint every a segment distance (general 50 or 100 meters).

China uses rock gas only to be in degree among a small circle in the past, and as if the distance of laying pipeline is shorter, therefore, the insulating joint that uses on the pipeline is not too too haggled over its structure, price because of consumption is few, use from state's outsourcing so all disregard expensively.Outside the price height, also there is the deficiency that trouble is installed except aforesaid complex structure in the insulating joint of external import.This gas line network that China is extended to depth is recently laid the bottleneck factor that has constituted restriction.

Summary of the invention

Task of the present utility model be to provide a kind of simple in structure, be easy to install, safe and cheap insulating joint.

Task of the present utility model is finished like this, a kind of insulating joint, and it comprises a pair of upper and lower conduit 11,4, this respectively constitutes flange 10,5 to outer lug to upper and lower conduit 11,4 respectively at their aspectant end port position places; One insulating bush 3, the expansion of one end is provided with a cavity 14, and this cavity 14 matches with flange 5, and the other end is slightly narrow to contract, and is fixed on the body of downcomer 4; One sealing gasket 8, its inwall central position has a felt pad ring recess 7, is embedded an insulating washer 6 in this felt pad ring recess 7, and the both sides of sealing gasket 8 are fixed on the tube head 9,13 of upper and lower conduit 11,4, and are separated by 6 pairs of upper and lower conduits 11,4 of insulating washer; One sleeve 2 is fixed in outside flange 10, sealing gasket 8, the insulating bush 3, tool retaining edge 1, and this retaining edge 1 cooperates with the slightly narrow end outer wall that contracts of geographical cover 3.

The material of insulating washer 6 described in the utility model is the glass fiber reinforced polyester carbonic ether.

The utility model has been owing to adopted above-mentioned design, has simple in structure, easy to install, and safer and cheap.

Accompanying drawing and drawing explanation

Fig. 1 is an assembling assumption diagram of the present utility model.

Fig. 2 is the schematic representation that the sectional view of Fig. 1 is held concurrently and connected with the pneumatic tube pipeline.

Embodiment

Ask for an interview Fig. 1, a upper conduit 11, one end wall outside the position that is close to tube head 9 constitutes a flange 10 protrudingly, and its other end is promptly managed tail bit and is formed with one and is beneficial to the connection angle 12 that docks with pneumatic tube.One downcomer 4, one end wall outside the position that is close to tube head 13 is formed with a flange 5 protrudingly.Flange 10,5 is integrally formed with upper and lower conduit 11,4 respectively, and their material is to have withstand voltage respond well metal.An insulating bush 3, insulating material by the anticorrosion effect excellence is made, the expansion of one end has been set as a cavity 14, cavity 14 matches with flange 5, it is fixed on the body of downcomer 4 with respect to then slightly narrow the contracing of the other end that expansion is provided with cavity 14, thereby make whole insulating bush 3 constitute sectional shape is Shape.Sealing gasket 8 adopts the desirable insulating material of anticorrosion effect to produce, cave in and become to have a felt pad ring recess 7 in its inwall intermediate portion, tight embedding is by the insulating washer 6 of glass fiber reinforced polyester carbonic ether material in the groove, when the two ends of sealing gasket 8 or when claiming on the tube head 9,13 that build-in ground, both sides is connected to upper and lower conduit 11,4, then play the contact action that insulate between the upper and lower conduit 11,4 by this insulating washer 6.The base portion of sleeve 2 is formed with a retaining edge 1, and when its cover was affixed on flange 10, sealing gasket 8, the insulating bush 3, its 1 at edge of retaining cooperated with the narrow slightly outer wall that contracts of insulating bush 3, and its front end is in soldering opening 16 (see figure 2) places and flange 10 solid weldings.According to aforementioned the utility model assembling is finished after, for eliminating between the parts gap that might exist of being brought because of assembly technology or component processing technology, then under pressurized state, irritate with epoxy resin and fill, erect fastness and guarantee perfect insulating properties in the hope of the integrity of excellence of getting the utility model structure with machinery.In addition, the utility model insulating joint can be made into corresponding specification according to the thickness of pneumatic tube, therefore, should be by its size not think the scope that has broken away from the present techniques scheme.

Ask for an interview Fig. 2, it is the sectional view of Fig. 1, when will being connected to the pipeline 17,17 of pneumatic tube ' when going up with it, as long as respectively with the connection angle 12 of upper and lower conduit 11,4 ends, conduit connecting end 15 by welding manner respectively with pipeline 17,17 ' dock solid welding.Since the pipeline 17,17 of pneumatic tube ' on the utility model insulating joint has continued every 50 meters or 100 meters (iridium determine according to concrete condition and select rational distance), therefore, the phenomenon that the static of pneumatic tube 17,17 ' produced can not occur accumulating, thereby can play the effect of eliminating static, in addition, in case the situation of being struck by lightning also can be played by the utility model and keep away electro ultrafiltration.

Claims (2)

1, a kind of insulating joint is characterized in that it comprises a pair of upper and lower conduit (11), (4), and this respectively constitutes flange (10), (5) to outer lug to upper and lower conduit (11), (4) respectively at their aspectant end port position places; One insulating bush (3), the expansion of one end is provided with a cavity (14), and this cavity (14) matches with flange (5), and the other end is slightly narrow to contract, and is fixed on the body of downcomer (4); One sealing gasket (8), its inwall central position has a felt pad ring recess (7), be embedded an insulating washer (6) in this felt pad ring recess (7), the both sides of sealing gasket (8) are fixed on the tube head (9), (13) of upper and lower conduit (11), (4), and by insulating washer (6) upper and lower conduit (11), (4) are separated; One sleeve (2) is fixed in outside flange (10), sealing gasket (8), the insulating bush (3), tool retaining edge (1), and this retaining edge (1) cooperates with the slightly narrow end outer wall that contracts of insulating bush (3).

2, insulating joint according to claim 1, the material that it is characterized in that described insulating washer (6) is the glass fiber reinforced polyester carbonic ether.

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