CN202441886U - Rolling type sealing structure for long-distance pipe-jacking intermediate jacking station - Google Patents
Rolling type sealing structure for long-distance pipe-jacking intermediate jacking station Download PDFInfo
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- CN202441886U CN202441886U CN2012200259756U CN201220025975U CN202441886U CN 202441886 U CN202441886 U CN 202441886U CN 2012200259756 U CN2012200259756 U CN 2012200259756U CN 201220025975 U CN201220025975 U CN 201220025975U CN 202441886 U CN202441886 U CN 202441886U
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- seal
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- jacking
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Abstract
The utility model discloses a rolling type sealing structure for a long-distance pipe-jacking intermediate jacking station. The rolling type sealing structure comprises three sealing rings sleeved between a steel inner casing and a steel outer casing of the intermediate jacking station from front to back and four blocking rings sleeved on the outer side of the steel inner casing from front to back. The four blocking rings are respectively a first blocking ring arranged at the front end of the steel inner casing, a second blocking ring arranged right behind the first blocking ring, a third blocking ring positioned right behind the second blocking ring and a fourth blocking ring disposed right behind the third blocking ring. The three sealing ring are respectively a first sealing ring, a second sealing ring and a third sealing ring, wherein the first sealing ring can roll front and back between the first blocking ring and the second blocking ring, the second sealing ring can roll front and back between the second blocking ring and the third blocking ring, and the third sealing ring is clamped between the third blocking ring and the fourth blocking ring. The rolling type sealing structure is reasonable in design, convenient to process, manufacture, install and arrange, convenient to use and operate, and good in using effect. The sealing rings can roll front and back between the inner casing and the outer casing of the intermediate jacking station so as to effectively resolve the problem of abrasion of the sealing rings of the intermediate jacking station in a long-distance pipe-jacking process.
Description
Technical field
The utility model relates to a kind of sealing configuration, especially relates to a kind of long-distance pipe jacking relay well and uses the rolling type sealing configuration.
Background technique
Relay well is to be used for the segmentation jacking in the long-distance pipe jacking and the annular chamber that is located at the sealing in the middle of the pipeline section, and in the jacking construction process, relay well is one of effective measures that solve long-distance pipe jacking construction jacking force.At long-distance pipe jacking, particularly in the extra long distance pipe-jacking project, it is interval the jacking pipeline to be divided into several jackings, and in each interval a relay well is set.In conjunction with Fig. 1 and Fig. 2; Existing traditional relay well is made up of a plurality of equally distributed pipe bending cylinder 1, steel inner casing 2, outer steel shell 3 and piezometer ring plate 4 and sealing seal ring; And utilize anchor ear 5 that pipe bending cylinder 1 is fixed on the steel inner casing 2, and the sealing seal ring is a wedge shape sealing seal ring 6.During actual the laying; Between steel inner casing 2 and outer steel shell 3, lay two ring wedge shape sealing seal rings 6; And wedge shape sealing seal ring 6 is installed between adjacent two back-up rings 7 or is laid in the groove, and the fixed-site of wedge shape sealing seal ring 6 and its make outer steel shell 3 slidably reciprocate above that and can not produce seepage during actual the use.
In the short distance jacking construction; Can adopt above-mentioned traditional relay well as relay; But as to run into long distance, extra long distance or jacking soil layer be under the situation of medium coarse sand; The sealing performance of the used seal ring of then above-mentioned traditional relay well just is difficult to be able to guarantee that main cause has the following aspects: the first, wedge shape sealing seal ring 6 produces reverse friction when relay well is worked, thereby can occurs 6 upsets of wedge shape sealing seal ring inevitably and break away from steel inner casing 2 causing sealing to lose efficacy; The second, owing to the fixed-site of wedge shape sealing seal ring 6 in the actual using process of relay well, be in the sliding friction state all the time, the longer then sliding friction number of times of jacking distance is many more, thereby the degree of wear of wedge shape sealing seal ring 6 is bigger; When three, under jacking soil layer condition is the situation of sand, carrying out jacking; Sand constantly gets into the gap between the steel inner casing 2 and outer steel shell 3 in the relay well; And directly produce friction with wedge shape sealing seal ring 6, like this since with the wearing and tearing of very big degree increase wedge shape sealing seal ring 6 and cause 6 inefficacies of wedge shape sealing seal ring.Finding in the practice process in the past that wedge shape sealing seal ring 6 was often excessive and extrude from gap between front end back-up ring 7 and the outer steel shell 3 because of the degree of wear, causes and leaks.
In the actual jacking construction process; When the sealing seal ring makes its sealing property inefficacy because of the degree of wear is excessive after, can bring following practical problem: the first, the soil body around the relay well will get into relay well inside; Cause the pipeline soil body on every side to run off, cause surface subsidence; The second, push pipe will get in the pipe with lubricated slurries; Pipeline outer wall can not form effective lubricating slurry cover; Do not have the effectively assurance of slurry cover can cause the surface friction drag straight line in the pipeline outside to rise, probably cause the tubing damage with the top allowable power of tubing when top power surpasses push pipe; And whole pipe-jacking project has also just been counted out after the tubing breakage.In addition, the used wedge shape sealing of above-mentioned traditional relay well seal ring 6 can't be changed, even if can change, also is based at the beginning of the design or the structure of relay well is carried out corresponding change could realize, as adopting can regulate inner casing or movable back-up ring etc.
The model utility content
The utility model technical problem to be solved is to above-mentioned deficiency of the prior art; Provide a kind of long-distance pipe jacking relay well to use the rolling type sealing configuration; It is reasonable in design, processing and fabricating and install to lay convenient and use easy and simple to handle, using effect good; The O-ring seal that is adopted can carry out scroll forward and backward between the inner and outer shell of relay well, efficiently solve the wear problem of relay well seal ring in the long-distance pipe jacking process.
For solving the problems of the technologies described above; The technological scheme that the utility model adopts is: a kind of long-distance pipe jacking relay well is used the rolling type sealing configuration; It is characterized in that: comprise steel inner casing and 3 seal rings between the outer steel shell that are sleeved on relay well from front to back and be sleeved on 4 back-up rings in the steel inner casing outside from front to back, 4 said back-up rings are respectively the back-up ring one that is laid in steel inner casing front end, be positioned at back-up ring one dead astern and be laid in steel inner casing middle front part back-up ring two, be positioned at back-up ring two dead asterns and be laid in the back-up ring three of steel inner casing mid-rear portion and be positioned at the back-up ring four in back-up ring three dead asterns; The structure of 3 said seal rings is all identical with size, and 3 said seal rings be respectively between back-up ring one and the back-up ring two and can the seal ring one that carries out scroll forward and backward between back-up ring one and the back-up ring two, between back-up ring two and the back-up ring three and can carry out the seal ring two of scroll forward and backward between back-up ring two and the back-up ring three and be installed on back-up ring three and back-up ring four between seal ring three.
Above-mentioned long-distance pipe jacking relay well is used the rolling type sealing configuration, it is characterized in that: said seal ring one, seal ring two and seal ring three are O type O-ring seal.
Above-mentioned long-distance pipe jacking relay well is used the rolling type sealing configuration; It is characterized in that: the gap width between said steel inner casing and the outer steel shell is 15mm ± 2mm; The cross section of said O type O-ring seal is 22mm ± 2mm for circular and its cross-sectional diameter; Spacing between said back-up ring one and the back-up ring two is 300mm ± 20mm, and the spacing between back-up ring two and the back-up ring three is 300mm ± 20mm, and the spacing between back-up ring three and the back-up ring four is 30mm ± 2mm.
Above-mentioned long-distance pipe jacking relay well is used the rolling type sealing configuration, it is characterized in that: the spacing between said back-up ring four and the steel inner casing rearward end is 300mm ± 20mm.
Above-mentioned long-distance pipe jacking relay well is used the rolling type sealing configuration, it is characterized in that: the spacing between the front end of said steel inner casing and the back-up ring one is 10mm～20mm.
Above-mentioned long-distance pipe jacking relay well is used the rolling type sealing configuration, it is characterized in that: said back-up ring is the metal collar that is weldingly fixed on the steel inner casing.
Above-mentioned long-distance pipe jacking relay well is used the rolling type sealing configuration, it is characterized in that: the diameter of said O type O-ring seal and the diameter ratio of steel inner casing are 0.82～0.87.
The utility model compared with prior art has the following advantages:
1, simple in structure, reasonable in design and processing and fabricating and installation laying convenience, input cost is low.
2, use easy and simple to handle and using effect good; Adopt the use that matches of a sliding friction formula O-ring seal and two rolling friction formula O-ring seals; In the actual using process; Rolling friction formula O-ring seal can carry out scroll forward and backward between the inner and outer shell of relay well, effectively avoided the damage of sliding friction to O-ring seal, can effectively solve practical problem such as relay well ring wear in the long-distance pipe jacking process.Compare the seal form of traditional relay well; The rolling friction formula O-ring seal that the utility model adopted rolls between inside and outside shell; Can effectively extend working time and the jacking distance; The most important thing is to solve the back seepy question that breaks away from the formation of steel inner casing of cushion rubber upset that existing wedge-type seal cushion rubber causes because of reverse friction when relay well is worked, increased operational safety, can effectively solve the relay well sealing problem in the long-distance pipe jacking process.
In sum; The utility model is reasonable in design, processing and fabricating and install to lay convenient and use easy and simple to handle, using effect good; The O-ring seal that is adopted can carry out scroll forward and backward between the inner and outer shell of relay well, efficiently solve the wear problem of relay well seal ring in the long-distance pipe jacking process.
Through accompanying drawing and embodiment, the technological scheme of the utility model is done further detailed description below.
Description of drawings
Fig. 1 is the internal structure schematic representation of existing relay well.
Fig. 2 by existing relay well the installation position schematic representation of employing sealing seal ring.
Fig. 3 is the user mode reference drawing of the utility model when pipe bending cylinder is in complete retracted state.
Fig. 4 is in the user mode reference drawing when ejecting state fully for the utility model at pipe bending cylinder.
Description of reference numerals:
The 1-pipe bending cylinder; 2-steel inner casing; The 3-outer steel shell;
4-piezometer ring plate; The 5-anchor ear; 6-wedge shape sealing seal ring;
The 7-back-up ring; 7-1-back-up ring one; 7-2-back-up ring two;
7-3-back-up ring three; 7-4-back-up ring four; 8-1-seal ring one;
8-2-seal ring two; 8-3-seal ring three; Link before the 9-;
The 10-rear connectors; Mounting plate behind the 11-oil cylinder; The 12-connecting plate.
Embodiment
Like Fig. 3, shown in Figure 4; The utility model comprise steel inner casing 2 and 3 seal rings between the outer steel shell 3 that are sleeved on relay well from front to back and 7,4 the said back-up rings 7 of 4 back-up rings that are sleeved on steel inner casing 2 outsides from front to back be respectively back-up ring one 7-1 that is laid in steel inner casing 2 front ends, be positioned at back-up ring one 7-1 dead astern and be laid in steel inner casing 2 middle front parts back-up ring two 7-2, be positioned at back-up ring two 7-2 dead asterns and be laid in back-up ring three 7-3 of steel inner casing 2 mid-rear portions and be positioned at back-up ring four 7-4 in back-up ring three 7-3 dead asterns.The structure of 3 said seal rings is all identical with size, and 3 said seal rings be respectively between back-up ring one 7-1 and back-up ring two 7-2 and can seal ring one 8-1 that carries out scroll forward and backward between back-up ring one 7-1 and back-up ring two 7-2, between back-up ring two 7-2 and back-up ring three 7-3 and can carry out seal ring two 8-2 of scroll forward and backward between back-up ring two 7-2 and back-up ring three 7-3 and be installed on back-up ring three 7-3 and back-up ring four 7-4 between seal ring three 8-3.
In the present embodiment, said seal ring one 8-1, seal ring two 8-2 and seal ring three 8-3 are O type O-ring seal.
The diameter of said O type O-ring seal and the diameter ratio of steel inner casing 2 are 0.82～0.87.In the present embodiment, the diameter of said O type O-ring seal and the diameter ratio of steel inner casing 2 are 0.87.
When as installed is laid; The cross section of said O type O-ring seal is 22mm ± 2mm for circular and its cross-sectional diameter; Spacing between said back-up ring one 7-1 and back-up ring two 7-2 is 300mm ± 20mm; Spacing between back-up ring two 7-2 and back-up ring three 7-3 is 300mm ± 20mm, and the spacing between back-up ring three 7-3 and the back-up ring 7-4 is 30mm ± 2mm.Spacing between said back-up ring four 7-4 and steel inner casing 2 rearward end is 300mm ± 20mm.In the present embodiment; The cross-sectional diameter of said O type O-ring seal is 22mm; Spacing between said back-up ring one 7-1 and back-up ring two 7-2 is 300mm; Spacing between back-up ring two 7-2 and back-up ring three 7-3 is 300mm, and the spacing between back-up ring three 7-3 and back-up ring four 7-4 is 30mm, and the spacing between said back-up ring 7-4 and steel inner casing 2 rearward end is 300mm.
In the present embodiment, the spacing between the front end of said steel inner casing 2 and back-up ring one 7-1 is 10mm～20mm.
Actually add man-hour, said back-up ring 7 is for to be weldingly fixed on the metal collar on the steel inner casing 2, and promptly back-up ring one 7-1, back-up ring two 7-2, back-up ring three 7-3 and back-up ring four 7-4 are metal collar.
In the actual using process; In steel inner casing 2, along the circumferential direction evenly be laid with a plurality of pipe bending cylinders 7; And a plurality of said pipe bending cylinders 7 are fixed on the steel inner casing 2 through mounting plate behind the oil cylinder 11 and anchor ear 5, and correspondence is provided with anchor ear 5 is fixedly coupled plate 12 on the madial wall of said steel inner casing 2.In the present embodiment, when said pipe bending cylinder 7 is in complete retracted state, mounting plate 11 and be laid in spacing between the piezometer ring plate 4 of outer steel shell 3 front ends and be slightly larger than the spacing between the end, pipe bending cylinder 7 front and back when being in complete retracted state behind the oil cylinder.Said piezometer ring plate 4 installed in front are useful on the preceding link 9 that connects the jacking pipeline, and steel inner casing 2 rear portions are equipped with the rear connectors 10 that is used to connect the jacking pipeline.
In the actual using process, by back-up ring two 7-2 one side direction back-up ring one 7-1 one side roll, promptly said seal ring one 8-1 is rolling friction to said seal ring one 8-1 with the thrusting action of pipe bending cylinder 7; And its rolling stroke is 300mm; When pipe bending cylinder 7 oil cylinders ejected fully, relay well quit work, the jacking forward of main top, rear; Steel inner casing 2 is pushed ahead compression pipe bending cylinder 7 returns simultaneously, and this moment, seal ring one 8-1 was rolled back to back-up ring two 7-2 one side by back-up ring one 7-1 one side; Seal ring two 8-2 with the thrusting action of pipe bending cylinder 7 by back-up ring three 7-3 one side direction back-up ring two 7-2 one side roll; Be that seal ring two 8-2 are rolling friction in the actual using process; And its rolling stroke is 300mm, and the working principle of seal ring two 8-2 is identical with the working principle of seal ring one 8-1; Seal ring three 8-3 are installed between back-up ring three 7-3 and back-up ring four 7-4, and three 8-3 of seal ring described in the actual using process are sliding friction.
In the present embodiment; Spacing between steel inner casing 2 outer side walls and outer steel shell 3 madial walls (being the gap width between steel inner casing 2 and the outer steel shell 3) is 15mm; It is the rubber seal of Φ 22mm that said O type O-ring seal adopts cross-sectional diameter, and shore hardness is 35～40, and the rubber decrement is 32%; It is 0.87 comparatively suitable that the diameter of said O type O-ring seal and the diameter ratio of steel inner casing 2 are controlled at, Tai Song or too tightly all possibly cause the cushion rubber can not synchronous rolling on housing.
During relay well work, the main effect of seal ring three 8-3 is to stop the outer silt of housing, foreign material etc., and seal ring one 8-1 and seal ring two 8-2 are rolling friction, and after seal ring three 8-3 lost efficacy, seal ring two 8-2 bore effects such as stopping silt, foreign material; Correspondingly, after seal ring two 8-2 lost efficacy, seal ring one 8-1 bore effects such as stopping silt, foreign material.
The above; It only is the preferred embodiment of the utility model; Be not that the utility model is done any restriction; Everyly any simple modification that above embodiment did, change and equivalent structure are changed, all still belong in the protection domain of the utility model technological scheme according to the utility model technical spirit.
Claims (7)
1. a long-distance pipe jacking relay well is used the rolling type sealing configuration; It is characterized in that: comprise steel inner casing (2) and 3 seal rings between the outer steel shell (3) that are sleeved on relay well from front to back and be sleeved on 4 back-up rings (7) in steel inner casing (2) outside from front to back, 4 said back-up rings (7) are respectively the back-up ring one (7-1) that is laid in steel inner casing (2) front end, be positioned at back-up ring one (7-1) dead astern and be laid in steel inner casing (2) middle front part back-up ring two (7-2), be positioned at back-up ring two (7-2) dead astern and be laid in the back-up ring three (7-3) of steel inner casing (2) mid-rear portion and be positioned at the back-up ring four (7-4) in back-up ring three (7-3) dead astern; The structure of 3 said seal rings is all identical with size, and 3 said seal rings be respectively be positioned between back-up ring one (7-1) and the back-up ring two (7-2) and can the seal ring one (8-1) that carries out scroll forward and backward between back-up ring one (7-1) and the back-up ring two (7-2), be positioned between back-up ring two (7-2) and the back-up ring three (7-3) and can carry out the seal ring two (8-2) of scroll forward and backward between back-up ring two (7-2) and the back-up ring three (7-3) and be installed on back-up ring three (7-3) and back-up ring four (7-4) between seal ring three (8-3).
2. use the rolling type sealing configuration according to the described long-distance pipe jacking relay well of claim 1, it is characterized in that: said seal ring one (8-1), seal ring two (8-2) and seal ring three (8-3) are O type O-ring seal.
3. use the rolling type sealing configuration according to the described long-distance pipe jacking relay well of claim 2; It is characterized in that: the gap width between said steel inner casing (2) and the outer steel shell (3) is 15mm ± 2mm; The cross section of said O type O-ring seal is 22mm ± 2mm for circular and its cross-sectional diameter; Spacing between said back-up ring one (7-1) and the back-up ring two (7-2) is 300mm ± 20mm; Spacing between back-up ring two (7-2) and the back-up ring three (7-3) is 300mm ± 20mm, and the spacing between back-up ring three (7-3) and the back-up ring four (7-4) is 30mm ± 2mm.
4. use the rolling type sealing configuration according to the described long-distance pipe jacking relay well of claim 3, it is characterized in that: the spacing between said back-up ring four (7-4) and steel inner casing (2) rearward end is 300mm ± 20mm.
5. use the rolling type sealing configuration according to claim 3 or 4 described long-distance pipe jacking relay wells, it is characterized in that: the spacing between the front end of said steel inner casing (2) and the back-up ring one (7-1) is 10mm～20mm.
6. use the rolling type sealing configuration according to the described long-distance pipe jacking relay well of arbitrary claim in the claim 1 to 4, it is characterized in that: said back-up ring (7) is for being weldingly fixed on the metal collar on the steel inner casing (2).
7. use the rolling type sealing configuration according to claim 2,3 or 4 described long-distance pipe jacking relay wells, it is characterized in that: the diameter ratio of the diameter of said O type O-ring seal and steel inner casing (2) is 0.82～0.87.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200259756U CN202441886U (en) | 2012-01-19 | 2012-01-19 | Rolling type sealing structure for long-distance pipe-jacking intermediate jacking station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200259756U CN202441886U (en) | 2012-01-19 | 2012-01-19 | Rolling type sealing structure for long-distance pipe-jacking intermediate jacking station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202441886U true CN202441886U (en) | 2012-09-19 |
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ID=46823338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200259756U Expired - Lifetime CN202441886U (en) | 2012-01-19 | 2012-01-19 | Rolling type sealing structure for long-distance pipe-jacking intermediate jacking station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202441886U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104132140A (en) * | 2014-07-17 | 2014-11-05 | 中铁工程装备集团有限公司 | Rolling supporting type sealing device for intermediate jacking station of rectangular shield tube jacking machine |
| CN106764057A (en) * | 2016-11-17 | 2017-05-31 | 安徽路鼎科技股份有限公司 | Mutual-inserting type relay well |
| CN107061866A (en) * | 2017-03-31 | 2017-08-18 | 韩宝珠 | A kind of mutual-inserting type relay well |
| CN108980462A (en) * | 2018-10-18 | 2018-12-11 | 上海公路桥梁（集团）有限公司 | Steel jacking pipe joints relay well and its construction method |
| CN111022081A (en) * | 2020-01-08 | 2020-04-17 | 中铁四局集团第四工程有限公司 | Long-distance water-rich sand layer pipe jacking intermediate and filling and sealing method thereof |
| CN114857353A (en) * | 2022-04-21 | 2022-08-05 | 中铁一局集团有限公司 | Construction method of jacking pipe internally-penetrated steel sleeve steel steam pipeline |
-
2012
- 2012-01-19 CN CN2012200259756U patent/CN202441886U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104132140A (en) * | 2014-07-17 | 2014-11-05 | 中铁工程装备集团有限公司 | Rolling supporting type sealing device for intermediate jacking station of rectangular shield tube jacking machine |
| CN106764057A (en) * | 2016-11-17 | 2017-05-31 | 安徽路鼎科技股份有限公司 | Mutual-inserting type relay well |
| CN107061866A (en) * | 2017-03-31 | 2017-08-18 | 韩宝珠 | A kind of mutual-inserting type relay well |
| CN108980462A (en) * | 2018-10-18 | 2018-12-11 | 上海公路桥梁（集团）有限公司 | Steel jacking pipe joints relay well and its construction method |
| CN111022081A (en) * | 2020-01-08 | 2020-04-17 | 中铁四局集团第四工程有限公司 | Long-distance water-rich sand layer pipe jacking intermediate and filling and sealing method thereof |
| CN114857353A (en) * | 2022-04-21 | 2022-08-05 | 中铁一局集团有限公司 | Construction method of jacking pipe internally-penetrated steel sleeve steel steam pipeline |
| CN114857353B (en) * | 2022-04-21 | 2024-04-05 | 中铁一局集团有限公司 | Construction method for penetrating steel sleeve steel steam pipeline in jacking pipe |
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| GR01 | Patent grant | ||
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Granted publication date: 20120919 |