CN1306204C

CN1306204C - Stainless steel piston type pipeline temperature compensator

Info

Publication number: CN1306204C
Application number: CNB2004100409452A
Authority: CN
Inventors: 廖仲力
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-11-02
Filing date: 2004-11-02
Publication date: 2007-03-21
Anticipated expiration: 2024-11-02
Also published as: CN1603672A

Abstract

The present invention relates to a piston-type temperature compensator for a stainless steel pipeline, which solves the problems of the existing wave-shaped compensator, the existing sleeve-type compensator and a normal compression type compensator that the sealing life is short. The present invention adopts a sealed stainless steel inner sleeve pipe which is provided with a connecting rod with lug boss segments, and one or more of sealing groves, the inner sleeve pipe is inserted in an outer sleeve pipe, and a gap is formed between both of the pipes so both of the sleeve pipes are not deformed in temperature change; an end-opening protective jacket is arranged on the opening end of the outer sleeve pipe; the sealing grooves are designed according to spacing seal, and the service life of rubber is guaranteed; the connecting rod with a plurality of sealing lug boss segments is helpful to ensure the concentricity and the sealing performance of both of the sleeve pipes; due to the arrangement of carved temperature marks, the arrangement and the adjustment of the present invention are accurate, the product of the present invention is guaranteed not to be damaged, and the pipeline is guaranteed to be in the best compensation state. If the lug boss sections adopt engineering plastics, the hardness degree of the sealing rings is low, so friction force caused by water resistance can be reduced, and the sensitivity of the compensator is enhanced; the inner sleeve pipe or an inner pipe is made of stainless steel so the sealing performance can not be weakened by concave spots, troughs and cracks occurring in the inner wall of a carbon steel pipe, the interior of the pipe is a smooth surface without the residual of filth, and the sanitation property of the present invention is good. The present invention can be used for metallic pipelines, particularly the stainless steel pipeline.

Description

Stainless steel piston type pipe temperature compensator

(1) technical field: the invention belongs to the Pipe jointing part (F16L) that what has temperature correction.Every between two steel pipes of certain-length, be connected in series one in the general pipeline.The length change that the compensation pipeline expands with heat and contract with cold and takes place.Be suitable for what metallic conduit, particularly stainless steel pipeline.

(2) background technique: existing pipe temperature compensator has following several:

1. bellow expansion joint 9: as Fig. 5, establish waveform joint 9.3, one ends 9.1 and be connected by welding or flange with externally connected pipe, the other end also links to each other with externally connected pipe by flange 9.4, the inner sleeve 9.2 that waveform joint endoporus dress supports.When steel pipe expands with heat and contract with cold, compensate by the waveform joint is flexible.To require the necessary book of bellows pipe thickness in order satisfying to shrink, to influence the raising that pipeline bears hydraulic pressure for this reason.The metal waveform saves long-term flexible easily generation fatigue and damages in addition, can not keep and the same life-span of other pipeline, is needed to change in using process by what, causes pipe-line maintenance cost height.

2. traditional irony slip-type expansion joint 10: see Fig. 6, establish inner sleeve 10.1 and insert in the outer sleeves 10.2 that the sleeve port welded flange 10.3 outside, and be connected with another flange 10.6 with nut 10.4 and tighten up, adorn rubber flap between two flanges and seal 10.5.By the what inner sleeve weight and the hard to get along with what concentric of outer sleeve are arranged, form eccentric compression, the rubber flap sealing is impaired easily; Because of only establishing one sealing, sealing life is short again.This external cause inner sleeve adopts ferrous material, and inwall often has depression points, groove and the crackle of corrosion to cause the sealing failure.This irony sleeve expansion joint, owing to the weight reason, outer sleeve is fixed on the support 10.7, and the caulking gum scraper plate also is motionless, and unique moving member only has inner sleeve 10.1.

3. Chinese patent ' pipe fitting joint compensator ' (93203099.8) it insert outer tube with interior pipe, circle fluting dress sealing in outer tube, because of coming compressing rubber by the adjusting lock nut, shortcoming is that randomness is very big, easily pulls.Because of sealing with common compression type, the inner and outer pipes concentricity is difficult to guarantee again: if it is big then to rub between inner and outer pipes with drive fit, the easy card that takes place is managed, if using loose fit, interior pipe is that off-centre takes place fulcrum with the O-ring seals, easily wipe on outer tube interior pipe one termination, damage inwall, thereby destroyed sealing.And external nut connects only suitable what small-bore pipe.

(3) summary of the invention:

The stainless steel piston type pipe temperature compensator that the present invention proposes solves the poor sealing performance that above-mentioned pipeline compensator exists exactly, the problem that the life-span is short.Its technological scheme is as follows:

Stainless steel piston type pipe temperature compensator has

1. establish inner sleeve 1 and insert in the outer sleeve 4, both external end heads are established interface 5 respectively and are linked to each other with 8 by the outside two tubes 6 that connects with two ends with 7; Inner sleeve 1 inner termination has one section heavy wall boss section 1.2 that axial L1 is long, and 1 and above spill annular groove 1.1, the seal ring 2 of packing in the groove and matching are opened in its outer garden;

2. contain the boss section 1.2 of spill annular groove, all there are void pitch L and L2 in axial forward end and rear end;

3. the outer sleeve port is installed in the port protection cover 3 that the inner sleeve periphery is slided;

It is characterized in that:

I. seal ring 2 materials adopt bright rubber of ternary second or chlorinated scoline, and its shore hardness is in 55-75; The inner sleeve 1 whole stainless steel material that adopts is made; Or its in interior pipe 1.4 use stainless steel material, the outside trough of belt boss section 1.2 use engineering plastics, both connect as one with screw.

Ii. the parameter of spill annular groove 1.1 and 2 cooperations of seal ring is selected as follows: each annular groove cross-section area S1 and the ratio S1/S2 of seal ring cross-section area S2 are 0.6-1.4, and each seal ring height H 2 is 1.1-1.3 with the ratio H2/H1 of the dark H1 of annular groove;

What iii. the inner sleeve surface was provided with temperature variation collapsing length data scribes mark 1.3.

Above-mentioned S1/S2 and H2/H1 can adopt more, and optimization range is: each annular groove cross-section area S1 and the ratio S1/S2 of seal ring cross-section area S2 are 1.05-1.25, and each seal ring height H 2 is 1.2-1.3 with the ratio H2/H1 of the dark H1 of annular groove.

Above-mentioned boss section inner concave shape annular groove is generally offered 1-3 vertically.Can adopt drive fit between above-mentioned trough of belt boss section 1.2 and outer sleeve endoporus, generally both radial clearances are in 15.Above-mentioned port protection cover 3 usefulness screws 2.1 are what outer sleeve 4 end faces fixedly, and the interior cover 3.1 of fluorine rubber or other friction lower resistance material can be adorned in interior garden.Above-mentioned

interface

5 and 7 applicable welding types or clamp-press type or flange-type or nut wire ring loose joint formula or internal threaded nut formula.

Beneficial effect of the present invention:

(1) this patent has adopted spacing seal groove design, be to cooperate the ginseng placate to choose within the scope of the invention between spill annular groove and the seal ring, have the relation of spacing compression between the two, thereby guaranteed the sealing life of rubber, accomplish the rigid body fore and aft motion thus, the water resistance sealing of flexible body.

(2) this patent has adopted the piston type temperature compensator of band boss, and because of boss section 1.2 has certain-length, in making, what same axis in outer sleeve place guarantees that both concentricitys reach correspondingly sealability.Closely cooperate if make between it and outer sleeve, then both concentricitys and sealability will be better.Can adopt a plurality ofly again by the what seal ring, increase on the one hand the effect of water resistance sealing, because of axial a plurality of steps of formation on many sealings and the corresponding boss, also further limit radially throw of inner sleeve again, promptly guarantee concentricity.

(3) adopt high strength, the bright rubber of ternary second of high wear resistance or wear-resisting flexible sealing rubber chlorinated scoline to make seal ring, can make life of product height, water pressure resistance height.

(4) by the inside and outside drive pipes concentricity height of what, boss section 1.2 adopts engineering plastics (as fluorine rubber) again, and the bright rubber of ternary second that sealing ring material adopts and the Tai Shi hardness lower (55-65) of chlorinated scoline, therefore the frictional force between boss section and outer sleeve is little, the realization miniature power starts, and compensator is highly sensitive thus.

(5) can do longlyer because of inside and outside sleeve pipe, so movably stroke is long in it, so compensation range is big.

(6) inner sleeve 1 or interior pipe 1.4 adopt stainless steel material, can avoid carbon steel material depression points, groove and crackle to occur at the inner sleeve inwall, influence sealability.And avoid dirt residual for the smooth mirror surface state in the pipe, wholesomeness is good.

(7) this kind piston type compensator structure, by the flexible Stroke Control of what design in 36-136mm, so even outer sleeve thickness book also can effectively guarantee radially garden degree very, thereby the assurance sealing.

(8) mark 1.3 is scribed in setting, installs and adjusts accurately, guarantees that product does not damage.Adjust to ambient temperature when only needing to install, just can make place, pipeline running back what The optimal compensation state.

(9) these compensator two end interfaces have multiple pattern to meet consumers' demand.

(10) effect of port protection cover 3 is set: when making internal and external casing flexible with overcoat maintenance concentricity.Establish the interior cover 3.1 of fluorine rubber and lower resistance material by what, can when flexible, protect the inner sleeve surface injury-free.Also be the cut off point that inner sleeve boss section moves simultaneously.

(11) seeing that this pipeline compensator is total is that volume is little, and in light weight, the life-span is long, and is non-maintaining.

(4) description of drawings:

Fig. 1. structure of the present invention is always schemed

Fig. 2. one of

port

5,7 structural types: flange connects.

Fig. 3. two of

port

5,7 structural types: internal threaded nut.

Fig. 4. three of

port

5,7 structural types: nut wire ring loose joint.

Fig. 5. one of background technique: bellow expansion joint structural drawing.

Two of Fig. 6 background technique: slip-type expansion joint structural drawing.

(5) embodiment:

Embodiment 1: see Fig. 1, the inner sleeve 1 that stainless steel material is made inserts in the outer sleeve 4, and both external end heads are established

interface

5 and 7 respectively, and present embodiment 1 is taken as the welding type interface, with welding manner respectively with stainless steel pipeline in two pipes 6 and 8 be connected and fixed.Inner sleeve 1 termination boss section 1.2 (length is L1), outer surface is opened three spill annular grooves 1.1, the O-ring seals 2 of packing in each groove.

Both ginseng placates that cooperates of seal ring 2 and annular groove 1.1 are selected as follows: each annular groove cross-section area S1 and the ratio S1/S2 of seal ring cross-section area S2 are 1.05, and each seal diameter H2 and the ratio H2/H1 of the dark H1 of annular groove are 1.25.

The void pitch L of boss section 1.2 axial forward end and rear end and L2 can the relative displacement covers when guaranteeing that inside and outside sleeve pipe expands with heat and contract with cold.Port protection cover 3 can be an open circles ring cowling cover, uses fixedly what outer sleeve 4 end faces of screw 3.2, and cover 3.1 in the fluorine rubber is equipped with in garden in it.When the port protection cover 3 of dismantling, then 1 of inner sleeve can be pulled out in outer sleeve 4.The O-ring seals material adopts the bright rubber of ternary second, and its shore hardness is taken as 60, and boss section 1.2 is a drive fit with outer sleeve 2 interior gardens.What the garden was axially arranged with collapsing length placate certificate outside inner sleeve 1 scribes mark 1.3.

Embodiment 2: see Fig. 1

Inner sleeve 1 inner termination boss section 1.2 outer surfaces are opened three spill annular grooves 1.1, the O-ring seals 2 of packing in each groove, both cooperation ginseng placates are as follows: each annular groove cross-section area S1 and the ratio S1/S2 of seal ring cross-section area S2 are 1.1, and each seal diameter H2 and the ratio H2/H1 of the dark H1 of annular groove are 1.3.All the other structures are identical with embodiment 1.

Embodiment 3: see Fig. 1

Inner sleeve 1 inner termination boss section 1.2 outer surfaces are opened three spill annular grooves 1.1, the O-ring seals 2 of packing in each groove, and inner sleeve 1 is by stainless steel interior pipe of doing 1.4 and the boss section 1.2 with fluorine rubber making band groove that is sleeved on the interior pipe 1.4, the material shore hardness of seal ring 2 is 55 chlorinated scoline, 4 of boss section 1.2 and outer sleeves are the drive fit in 15, form the high piston type pipeline compensator of compensate for sensitivity thus.All the other structures are identical with embodiment 1.

Implement 4 and see Fig. 2, port 5 adopts flange to be connected 5.1 and 7.1 with 7 structures.All the other structures are identical with embodiment 1.

Embodiment 5: see Fig. 3,

port

5 and 7 structures adopt internal threaded nut 5.2 and 7.2.All the other structures with

Embodiment 1 is identical

Embodiment 6: see Fig. 4. and

port

5 and 7 structures adopt nut wire ring loose joint 5.3 and 7.3.All the other structures are identical with embodiment 1

Claims

1. stainless steel piston type pipe temperature compensator has

1. establish inner sleeve (1) and insert in the outer sleeve (4), both external end heads are established interface (5) respectively and are linked to each other with (8) by the outside two tubes (6) that connects with two ends with (7); Inner sleeve (1) inner termination has-the long heavy wall boss section (1.2) of the axial L1 of section, and 1 and above spill annular groove (1.1), the seal ring (2) of packing in the groove and matching are opened in its outer garden;

2. contain the boss section (1.2) of spill annular groove, all there are void pitch L and L2 in axial forward end and rear end;

3. the outer sleeve port is installed in the port protection cover (3) that the inner sleeve periphery is slided;

It is characterized in that:

I. sealing ring material adopts bright rubber of ternary second or chlorinated scoline, and its shore hardness is in 55-75; The whole stainless steel material that adopts of inner sleeve is made; Or its in interior pipe (1.4) use stainless steel material, the outside trough of belt boss section (1.2) use engineering plastics, both are connected to-body with screw.

Ii. the parameter that cooperates between spill annular groove (1.1) and seal ring (2) is selected as follows: each annular groove cross-section area S1 and the ratio S1/S2 of seal ring cross-section area S2 are 0.6-1.4, and each seal ring height H 2 is 1.1-1.3 with the ratio H2/H1 of the dark H1 of annular groove;

What iii. the inner sleeve surface was provided with temperature variation collapsing length data scribes mark (1.3).

2. by the described temperature compensator of claim 1, it is characterized in that each annular groove cross-section area S1 and the ratio of seal ring cross-section area S2 are 1.05-1.25, each seal ring height H 2 is 1.2-1.3 with the ratio of the dark H1 of annular groove.

3. by the described temperature compensator of claim 1, it is characterized in that spill annular groove (1.1) offers 1～3 vertically.

4. by the described temperature compensator of claim 1, it is characterized in that boss section and outer sleeve endoporus are drive fit.

5. by the described temperature compensator of claim 1, it is characterized in that cover (3.1) in the dress fluorine rubber of the interior garden of port protection cover (3).

6. by the described temperature compensator of claim 1, it is characterized in that interface (5) and (7) can adopt welding type or clamp-press type or flange-type or nut wire ring loose joint formula or internal threaded nut formula.