CN207961843U - Non-maintaining compound seal pressure balance sleeve expansion joint - Google Patents

Abstract

The utility model is a kind of non-maintaining compound seal pressure balance sleeve expansion joint, utilize included counter balance pocket, the blind flange force for overcoming pressure medium to generate, reduce the thrust to support of pipelines, including core-pipe subassembly, housing I components, housing II components, housing III components, three outer jacket members contain a left side respectively, right guide ring, flexible graphic compound sealed cabin, " O " type sealing ring, Y-shaped sealing ring, " O " type sealing ring, Y-shaped sealing ring, left guide ring and right guide ring are embedded in three outer jacket members respectively, use the reciprocating hermetic mode of multiple tracks rubber ring and the combination of flexible graphic compound sealed cabin, both the small feature of multiple tracks seal with elastometic washer frictional force had been remained, the good feature of graphite grazing effect is combined again；The big disadvantage of simple rubber is easy to aging, simple graphite grazing frictional force is overcome simultaneously, and in the case of all aging seal failures of multiple tracks rubber ring, flexible graphic compound sealed cabin remains to play sealing function, enables compensator normal use.

Description

Non-maintaining compound seal pressure balance sleeve expansion joint

Technical field

The utility model is related to a kind of non-maintaining compound seal pressure balance sleeve expansion joints.

Background technology

It is most of to be applied using direct buried at present due to conveying hot water high-temperature medium in concentrated supply of heating in the city heat distribution pipe network If but have the aerial laying in part or be laid in piping lane, some piping lanes are limited by space, this had just both required heat distribution pipe network and benefit It is small and compensator is required to reach non-maintaining to repay device resistance.Simple seal with elastometic washer sleeve expansion joint, anti-aging property is poor, It is susceptible to compensator leakage phenomenon；Simple graphite grazing sleeve expansion joint, frictional force is too big, and cannot all overcome pipeline The blind flange force that pressure generates, cannot meet pipe network requirement.The problem of in the presence of for the above-mentioned prior art, research and design are a kind of Novel non-maintaining compound seal pressure balance sleeve expansion joint pipe fitting considers that piping lane space, pipe network stress and rubber are easy to aging Problem avoids compensator from leaking, and is the problems of in the prior art very necessary to overcome.

Invention content

The purpose of this utility model is to provide non-maintaining compound seal pressure balance sleeve expansion joint, and it is flat to carry pressure balance Weigh chamber, and the utility model technical solution used for the above purpose is：Non-maintaining compound seal pressure balance sleeve is mended Device, core-pipe subassembly, the first outer jacket member, the second outer jacket member, third outer jacket member are repaid, wherein three outer jacket members contain respectively Left and right guide ring, packing seal cabin, type sealing ring, three outer jacket members are separately mounted on core-pipe subassembly, sealing ring, Left guide ring and right guide ring are embedded in three outer jacket members respectively, sealing ring and soft graphite composition packing seal cabin, three Outer jacket member is welded and fixed together.

The included counter balance pocket of the compensator, the blind flange force for overcoming pressure medium to generate reduce the thrust to support of pipelines. Counter balance pocket is the space cavity by being formed between core-pipe subassembly, the first outer jacket member, the second outer jacket member three；When product makes Used time, there are the media of pressure for 1 inside cavity of core-pipe subassembly, just will produce certain blind flange force F1；When medium passes through core pipe Intercommunicating pore on component 1 enters in counter balance pocket, then also will produce certain blind flange force F2 in counter balance pocket, and blind flange force F2 with The directions F1 are opposite；When F2 and F1 are equal in magnitude, the blind flange force that product is born is theoretically equal to 0, that is, overcomes medium generation Blind flange force.

The sealing ring is multiple tracks rubber ring.

The rubber ring is " O " type or X-type or Y type rubber rings.

Sealed compartment is provided between core pipe end guide ring and sealing ring, the sealing material in sealed compartment is flexible stone Ink.

The outer surface chromium plating of the core pipe.

It is equipped with left guide ring and right guide ring in the reciprocating hermetic housing, is located at three outer jacket member both sides.

The sealing ring,（Flexible graphite packing+polytetrafluoro sealing ring）It is independent sealed to be combined into sealed compartment four.

The sealing ring, soft graphite and sealing ring constitute reciprocating hermetic structure.

The reciprocating hermetic is three outer jacket members, sealing ring, soft graphite and the common compound sealing of multiple-sealed circle.

A kind of non-maintaining compound seal pressure balance sleeve expansion joint provided by the utility model, in multiple-sealed rubber ring All in the case of aging seal failure, sealed compartment remains to play sealing function, and compensator is enable to reach non-maintaining.

The beneficial effects of the utility model are：The effect of non-maintaining compound seal pressure balance sleeve expansion joint is to utilize benefit The included counter balance pocket of device is repaid, the blind flange force for overcoming pressure medium to generate reduces the thrust to support of pipelines, it is close to be internally provided with filler Batten down.Flexible graphite sealing filler is sprung back containing height, non-maintaining compound seal pressure balance sleeve expansion joint both remains multiple tracks The small feature of seal with elastometic washer frictional force, and combine the good feature of graphite grazing effect；It is easy to overcome simple rubber simultaneously The big disadvantage of aging, simple graphite grazing frictional force, in the defect of rubber ring aging seal failure, sealed compartment remains to play close Envelope acts on, and the aging of rubber seal is avoided to cause the leakage of compensator, realizes that compensator dynamic sealing, compound seal pressure are flat Weighing apparatus sleeve expansion joint is really achieved non-maintaining.Particularly with the heat distribution pipe network that the limited caliber in piping lane space is larger, advantageously ensure that The safe and reliable operation of compensator, meanwhile, non-maintaining compound seal pressure balance sleeve expansion joint additional guiding ring is as activity Production orientation more makes compensator operate steadily, securely and reliably.The utility model has structure novel, simple installation, user Just the features such as, service life is long, safe and reliable.

Description of the drawings

Fig. 1 is the overall structure diagram of non-maintaining compound seal pressure balance sleeve expansion joint.

In figure, 1. core-pipe subassemblies；2. the packing seal cabin of the first outer jacket member；3. the guide ring of the first outer jacket member；4. First outer jacket member；5. the second outer jacket member；6. the guide ring of the second outer jacket member；7. the O-shaped sealing of the second outer jacket member Circle；8. the y-type seal ring of the second outer jacket member；9. the packing seal cabin of the second outer jacket member；10. third outer jacket member； 11. the O-ring seal of third outer jacket member；12. the y-type seal ring of third outer jacket member.

Specific implementation mode：

As shown in Figure 1, non-maintaining compound seal pressure balance sleeve expansion joint, including 1. core-pipe subassemblies；2. the first housing The packing seal cabin of component；3. the guide ring of the first outer jacket member；4. the first outer jacket member；5. the second outer jacket member；6. the The guide ring of two outer jacket members；7. the O-ring seal of the second outer jacket member；8. the y-type seal ring of the second outer jacket member； 9. The packing seal cabin of second outer jacket member；10. third outer jacket member；11. the O-ring seal of third outer jacket member；12. the The y-type seal ring of three outer jacket members.First outer jacket member, the second outer jacket member, third outer jacket member install twice " O " type respectively Sealing ring, one of Y-shaped sealing ring, assembling flexible graphic compound sealed cabin, inlay left and right guide ring respectively；First housing group Part, the second outer jacket member, third outer jacket member are welded and fixed together.The non-maintaining compound seal pressure balance set of the utility model Cylinder compensator, the counter balance pocket carried using compensator, the blind flange force for overcoming pressure medium to generate, reduction push away support of pipelines Power, in the case of all aging seal failures of three seals rubber ring, flexible graphic compound sealed cabin remains to play sealing function Enable compensator normal use.Rubber seal, soft graphite and sealed compartment composition duplex sealing are used, was both retained Three seal with elastometic washer frictional force small features, and combine the good feature of graphite grazing effect；It overcomes simultaneously simple The big disadvantage of rubber graphite grazing frictional force easy to aging, simple, in the defect of rubber ring aging seal failure, sealed compartment remains to Sealing function is played, compensator normal use is enable.The fortune of compensator is advantageously ensured that particularly with the larger pipeline of caliber Row safety, meanwhile, non-maintaining compound seal pressure balance sleeve expansion joint additional guiding ring is oriented to as active operation more to be made Compensator operates steadily, securely and reliably.The utility model have structure novel, simple installation, easy to use, service life is long, The features such as safe and reliable.

The novel protection domain of the above, novel preferable specific implementation mode only of the invention, but the present invention is simultaneously Not limited to this, all those familiar with the art are in the novel disclosed technical scope of the present invention, according to this hair The design of bright novel technical solution and its utility model, which is subject to equivalent substitution or change, should all cover of the invention novel Within protection domain.

Claims (9)

1. non-maintaining compound seal pressure balance sleeve expansion joint, it is characterised in that：Including core-pipe subassembly, the first outer jacket member, Second outer jacket member, third outer jacket member, three outer jacket members respectively include left and right guide ring, packing seal cabin, sealing Circle, the packing seal cabin includes sealing ring and soft graphite；Three outer jacket members are separately mounted on core-pipe subassembly；It is close Seal, left guide ring and right guide ring are embedded in three outer jacket members respectively, and three outer jacket members are welded and fixed together.

2. non-maintaining compound seal pressure balance sleeve expansion joint according to claim 1, it is characterised in that：Compensator is certainly Band counter balance pocket, the counter balance pocket is the space chamber by being formed between core-pipe subassembly, the first outer jacket member, the second outer jacket member three Body.

3. non-maintaining compound seal pressure balance sleeve expansion joint according to claim 1, it is characterised in that：The sealing Circle is multiple tracks rubber ring.

4. non-maintaining compound seal pressure balance sleeve expansion joint according to claim 3, it is characterised in that：Described is more Road rubber ring is O-shaped or X-type or Y type rubber rings.

5. non-maintaining compound seal pressure balance sleeve expansion joint according to claim 1, it is characterised in that：The filler Sealed compartment is set between guide ring and sealing ring.

6. non-maintaining compound seal pressure balance sleeve expansion joint according to claim 1, it is characterised in that：The core pipe The outer surface chromium plating of component.

7. non-maintaining compound seal pressure balance sleeve expansion joint according to claim 1, it is characterised in that：The sealing Ring, soft graphite and sealing ring constitute reciprocating hermetic structure.

8. non-maintaining compound seal pressure balance sleeve expansion joint according to claim 1, it is characterised in that：Described three It is equipped with left guide ring and right guide ring in outer jacket member, is located at the both sides of three outer jacket members.

9. non-maintaining compound seal pressure balance sleeve expansion joint according to claim 1, it is characterised in that：By sealing Circle, soft graphite, that sealing ring is combined into four is independent sealed.