CN114427633B - Device for eliminating negative pressure of non-metal pipe lining and installation method - Google Patents
Device for eliminating negative pressure of non-metal pipe lining and installation method Download PDFInfo
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- CN114427633B CN114427633B CN202011186952.9A CN202011186952A CN114427633B CN 114427633 B CN114427633 B CN 114427633B CN 202011186952 A CN202011186952 A CN 202011186952A CN 114427633 B CN114427633 B CN 114427633B
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- lining
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- 238000009434 installation Methods 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims abstract description 12
- 229910052755 nonmetal Inorganic materials 0.000 title claims abstract description 10
- 239000012530 fluid Substances 0.000 claims abstract description 22
- 238000007789 sealing Methods 0.000 claims description 33
- 239000000463 material Substances 0.000 claims description 6
- 239000000945 filler Substances 0.000 claims description 5
- 206010028980 Neoplasm Diseases 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 2
- 239000002184 metal Substances 0.000 abstract description 18
- 229910052751 metal Inorganic materials 0.000 abstract description 18
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 4
- 239000003345 natural gas Substances 0.000 abstract description 2
- 239000003209 petroleum derivative Substances 0.000 abstract description 2
- 238000004642 transportation engineering Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 18
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 239000000084 colloidal system Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000009954 braiding Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/1608—Devices for covering leaks in pipes or hoses, e.g. hose-menders by replacement of the damaged part of the pipe
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Valve Housings (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The invention discloses a device for eliminating negative pressure of a non-metal pipe lining and an installation method, comprising the following steps: the pipeline, connecting pipeline, upper clamp, lining pipe, support pipe, lower clamp and check valve structure; the pipeline is fixedly connected with the connecting pipeline; the connecting pipeline is provided with an annular opening and is provided with an upper clamp and a lower clamp; the outer wall of the lining pipe is contacted with the inner wall of the pipeline and the connecting pipeline; the inner wall of the lining pipe is also provided with the supporting pipe; the check valve structure is arranged in the upper clamp; the check valve structure is communicated with the inside of the pipeline in one way, and is communicated with the joint of the lining pipe and the connecting pipeline in the other way. The invention has the advantages that the fluid leaked between the metal pipeline and the lining pipe flows back into the pipeline through the check valve structure, so that the collapse problem of the lining pipe is avoided, the safety and the economy are improved, and the invention is suitable for petroleum and natural gas gathering and transportation and long-distance transportation engineering.
Description
Technical Field
The invention relates to the technical field of lining pipe repair, in particular to a device for eliminating negative pressure of a non-metal lining pipe and an installation method.
Background
The lining pipe technology is an important technology for repairing a metal pipe which is damaged by corrosion in the petroleum and natural gas industry, and the method comprises the steps of carrying out multistage constant diameter compression on the lining pipe with the outer diameter being the same as the inner diameter of the metal pipe to be repaired, pulling the lining pipe with the smaller outer diameter into the metal pipe which is cleaned and is well removed from tumors through a traction device, and finally recovering the lining pipe to the original shape through heating, pressurizing or natural recovery and other modes, so that the lining pipe is tightly attached to the metal pipe to be repaired, and the repair of the original metal pipe is realized.
HTPO liners are one of the current common liner technologies, and HTPO liners have two layers, an outer layer and an inner layer. The outer layer of the wear-resistant material is made of a material with good wear resistance, so that the wear-resistant material has a protective effect; the inner layer material is polyolefin plastic alloy, and has excellent high temperature resistance, stress cracking resistance and corrosion resistance. However, in practical engineering application, especially in a severe environment with high temperature and high pressure, small molecular gas is easy to leak into the interlayer of the HTPO lining pipe and the metal pipe, and when more gas leaks, the pressure of fluid in the interlayer is greater than the pressure of fluid in the HTPO lining pipe, so that the lining pipe is crushed, the normal transportation of oil gas is influenced, and even safety accidents are caused.
Chinese patent CN201920212576.2 discloses a novel lining tube comprising a corrosion resistant layer, a colloid layer and a protective layer which are sequentially arranged from inside to outside. The negative pressure/deformation resistance measures of the device mainly comprise: a negative pressure resistant layer formed by spirally distributed steel wire braiding layers is embedded in the colloid layer; a reinforcing layer formed by spirally distributed cord woven layers is embedded between the negative pressure resistant layer and the corrosion resistant layer; and a colloid layer formed by braiding copper wires in spiral distribution is embedded between the negative pressure resistant layer and the protective layer. By using the scheme, the deformation resistance of the lining pipe can be enhanced, and the collapse phenomenon of the lining pipe caused by negative pressure in the pipe is avoided. However, the lining pipe is difficult to deform and difficult to mechanically compress, so that the lining pipe is easily damaged and even blocked in the installation process, and in addition, the deformation-resistant layer is easily damaged by mechanically compressing the lining pipe. The lining pipe has excessive layers and high long-distance installation cost.
Disclosure of Invention
In view of the above, the present invention provides a device and a method for eliminating negative pressure of a non-metal pipe lining, which can solve the problem of negative pressure.
For this purpose, the invention is implemented by the following technical scheme.
An apparatus for relieving negative pressure in a lined nonmetallic tube, comprising: the pipeline, connecting pipeline, upper clamp, lining pipe, support pipe, lower clamp and check valve structure;
the pipeline comprises a first pipeline and a second pipeline, and the end parts of the two pipelines are fixedly connected with the two ends of the connecting pipeline respectively; the inner diameter of the pipeline is d 1 The inner diameter of the connecting pipeline is d 2 And d 1 ＝d 2 ；
The connecting pipeline is provided with an annular opening, and the upper clamp and the lower clamp are arranged at the opening; the upper clamp and the lower clamp are connected into an annular structure through bolts;
the lining pipe is made of nonmetal materials, and the outer wall of the lining pipe is in contact with the inner walls of the pipeline and the connecting pipeline; the inner wall of the lining pipe is also provided with the supporting pipe, and the axial installation position of the supporting pipe is consistent with the axial positions of the upper clamp and the lower clamp;
the check valve structure is arranged in the upper clamp; the check valve structure is communicated with the inside of the pipeline in one way, and is communicated with the joint of the lining pipe and the connecting pipeline in the other way.
Further, at least two annular grooves are formed in the contact part of the connecting pipeline and the clamp, and a second sealing ring is arranged in each annular groove; and the end parts of the first pipeline and the second pipeline are fixedly provided with mounting flanges and are connected with the two ends of the connecting pipeline through bolts.
Further, a two-stage stepped hole is formed in the upper end of the upper clamp, and the check valve structure is arranged in the stepped hole; the check valve structure comprises a valve body end cover, an upper valve seat, a lower valve seat and an elastic piece;
the upper part of the step hole is covered with the valve body end cover; the middle part of the step hole is sequentially provided with the upper valve seat and the lower valve seat; and a cavity structure is reserved at the joint of the upper valve seat and the lower valve seat, and an elastic piece is arranged in the cavity.
Further, at least one annular groove is formed in the end face, in contact with the lower valve seat, of the upper valve seat, and a first sealing ring is arranged in the annular groove; at least one annular groove is processed on the bottom surface of the inner side of the stepped hole, and a first sealing ring is arranged in the annular groove.
Furthermore, a connecting pipe annular groove on the connecting pipe is communicated with an upper clamp axial hole on the upper clamp, a connecting pipe annular groove is arranged on the contact end surface of the connecting pipe and the upper clamp, and the connecting pipe annular groove is communicated to the joint of the lining pipe and the connecting pipe through at least one connecting pipe radial groove; connecting pipe axial grooves are formed in the joint of the lining pipe and the connecting pipe along the inner wall of the connecting pipe, and the connecting pipe axial grooves correspond to the connecting pipe radial grooves one by one; the tail end of the connecting pipe axial groove is communicated with the connecting pipe radial groove;
the center of the upper valve seat is provided with a through hole along the axial direction and is respectively communicated with the axial holes of the upper clamping hoops at the two sides through the radial holes of the upper valve seat.
Further, a through hole is formed in the center of the lower valve seat and is communicated with the bottom through hole of the step hole, and through holes are formed in corresponding positions of the inner lining pipe and the support pipe, so that the cavity is communicated with the inside of the pipeline; and the upper end of the through hole of the lower valve seat is processed into a counter bore structure, and the elastic piece is installed.
Further, an upper clamping hoop annular groove is circumferentially arranged outside the bottom through hole of the step hole, and the upper clamping hoop annular groove is communicated with the bottom through hole through at least one upper clamping hoop radial groove; the upper end face of the lower valve seat is uniformly distributed with a plurality of lower valve seat axial holes around the through hole, and the lower valve seat axial holes are communicated with the upper clamping hoop annular groove.
Further, a sealing structure is arranged at the joint surface of the upper clamp and the lining pipe, and sealing filler is filled in the sealing structure.
On the other hand, the invention also provides an installation method based on the device for eliminating the negative pressure of the lining nonmetallic tube, which comprises the following specific steps:
s1, cutting a pipeline to be repaired, and reserving installation spaces for connecting the pipeline and the upper and lower clamps;
s2, cleaning, removing thorns, removing tumors and the like of the pipeline to be repaired;
s3, connecting the connecting pipeline with the pipeline to be repaired, and keeping neutral in the connecting process;
s4, carrying out multistage compression on the lining pipe, dragging the lining pipe into the pipeline to be repaired by using a traction device, and putting a supporting pipe into the lining pipe after the shape of the lining pipe is recovered;
s5, centering the pipelines at the two ends, and fixing the centered pipelines;
s6, installing an upper clamp and a lower clamp, temporarily not screwing a nut, drilling the inner liner tube and the support tube by referring to the position of the through hole of the upper clamp, and manufacturing a fluid flow passage in the check valve structure;
and S7, installing the check valve structure and the sealing element, and locking the upper clamp and the lower clamp after the check valve structure and the sealing element are fastened.
In another aspect, the present invention also provides a fluid transport conduit having means for relieving negative pressure from the liner non-metallic pipe installed therein.
The invention has the following advantages:
according to the invention, the check valve structure is arranged on the connecting clamp, and when the fluid pressure of the cavity between the lining pipe and the metal pipeline is greater than the fluid pressure in the lining pipe, the check valve is closed; when the fluid pressure of the cavity between the lining pipe and the metal pipeline is smaller than the fluid pressure in the lining pipe, the check valve is opened, the pressure difference between the inside and the outside of the lining pipe is eliminated, the phenomenon that the lining pipe is crushed due to overlarge pressure between the lining pipe and the metal pipeline is avoided, and the reliability of safe operation of the pipeline is improved. Meanwhile, the shell with the clamp structure is adopted, so that the installation and the disassembly are convenient, and the maintenance and the replacement are convenient.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings that are required for the embodiments will be briefly described below, and it will be apparent that the drawings in the following description are only one or several embodiments of the present invention, and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
The same numbers of structural distributions and locations shown in the drawings are for convenience in describing the invention only and are not intended to indicate or imply that the structures referred to must have a particular orientation, number of distributions, and are not to be construed as limiting the invention.
FIG. 1 is a schematic view of a semi-sectional structure of the present invention;
FIG. 2 is an enlarged schematic view of FIG. 1 at A;
FIG. 3 is a cross-sectional view of a connecting conduit according to the present invention;
FIG. 4 is an end elevation view of a connecting tube of the present invention;
FIG. 5 is a half cross-sectional view of a lower valve seat of the present invention;
FIG. 6 is a top view of a lower valve seat of the present invention;
FIG. 7 is a half cross-sectional view of an upper clip of the present invention;
FIG. 8 is a top view of the upper clip of the present invention;
FIG. 9 is an enlarged view at B in FIG. 7;
fig. 10 is an enlarged view at C in fig. 8.
In the figure:
1-a pipeline; 2-flanges; 3-connecting pipelines; 4-upper clamping hoop; 5-valve body end cap; 6-a first sealing ring; 7-a second sealing ring; 8-lining tube; 9-supporting the tube; 10-lower clamp; 11-upper valve seat; 12-an elastic member; 13-a lower valve seat; 14-sealing filler; 101-a first pipe; 102-a second conduit; 301-connecting the annular groove; 302-connecting the tube radial slots; 303-connecting tube axial slots; 401-upper clip radial groove; 402-upper clip ring groove; 403-upper clamp axial hole; 1101-upper valve seat radial holes; 1301-lower valve seat axial bore.
Detailed Description
In the description of the present invention, it should be noted that, the azimuth or positional relationship indicated by the terms "upper" and "lower" is based on the azimuth or positional relationship shown in the drawings, and the azimuth indicated by the terms "axial" and "radial" is consistent with the axial direction and the radial direction of the metal pipe in the drawings. Such terminology is used for convenience in describing the invention and is not to be taken as an indication or suggestion that the device or element in question must have a particular orientation, be constructed and operated in a particular orientation and therefore should not be construed as limiting the invention.
The invention will be further described with reference to fig. 1-10.
As shown in fig. 1, an apparatus for eliminating negative pressure of a non-metallic pipe lining, comprising: the pipeline 1, the flange 2, the connecting pipeline 3, the upper clamp 4, the valve body end cover 5, the first sealing ring 6, the second sealing ring 7, the lining pipe 8, the supporting pipe 9 and the lower clamp 10. The pipeline is specifically a metal pipeline, and the metal pipeline is divided before repair to form a first pipeline 101 and a second pipeline 102. Two flanges 2 are welded at the ends of the two sections of pipelines to be repaired and the two ends of the connecting pipeline 3, and the two sections of pipelines are connected through bolts. The inner diameter of the pipeline 1 is d 1 The inner diameter of the connecting pipeline 3 is d 2 And d 1 ＝d 2 . The upper end of the upper clamp 4 is provided with a two-stage stepped hole, the upper clamp 4 and the lower clamp 10 are matched with the two connecting pipelines 3 through bolt connection, and simultaneously, the left end and the right end of the upper clamp 4 are respectively provided with two second sealing rings 7 to form sealing with the two connecting pipelines 3; the valve body end cover 5 is fixed on the upper part of the step hole of the upper clamp 4 through a screw, and the lower outer ring is sleeved with the first sealing ring 6 and forms a seal with the cylindrical surface of the step hole of the clamp 4; the lining pipe 8 is attached inside the metal pipeline 1, the connecting pipeline 3 and the upper clamp 4. Preferably, the firstThe sealing ring 6 and the second sealing ring 7 are O-shaped sealing rings; the liner tube 8 is made of non-metal material, specifically HTPO liner tube.
As shown in fig. 2-10, the check valve structure is composed of the connecting pipeline 3, the upper clamp 4, the lining pipe 8, the upper valve seat 11, the elastic piece 12, the lower valve seat 13 and the sealing packing 14. Eight connecting pipe radial grooves 302 are uniformly distributed on the connecting pipe 3, each connecting pipe radial groove 302 is in one-to-one correspondence and communicated with the connecting pipe axial groove 303, and the eight connecting pipe radial grooves 302 are communicated with the connecting pipe annular groove 301 on the end face of the connecting pipe 3. The upper valve seat radial hole 1101 on the upper valve seat 11 communicates with the connecting pipe annular groove 301 through the upper clip axial hole 403 on the upper clip 4, and the center of the upper valve seat 11 has a through hole and a conical surface. A through hole is processed at the center of the lower valve seat 13, is communicated with the bottom hole of the step hole, and is communicated with the through holes on the lining pipe 8 and the supporting pipe 9; the center of the upper part of the lower valve seat 13 is processed into a sinking structure, a counter bore structure is processed at the through hole, and an elastic piece 12 is installed; the elastic member 12 is shown in fig. 2, the upper part is in a spherical crown structure, the lower part is in a cylinder structure, wherein the cylinder structure is placed in a counter bore structure, the outer ring of the counter bore structure is processed into an outer conical surface, and the inward concave inner conical surfaces arranged on the upper valve seat 11 are matched to form a cavity structure. Eight lower valve seat axial holes 1301 are uniformly distributed on the lower valve seat 13, and an upper clamp annular groove 402 on the upper clamp 4 is communicated with eight upper clamp radial grooves 401 and eight lower valve seat axial holes 1301; two first sealing rings 6 are respectively arranged between the lower valve seat 13 and the upper valve seat 11 as well as between the upper clamping hoop 4. The contact surface of the upper clamp 4 and the lining pipe 8 is provided with a sealing structure, in particular a tooth-shaped groove, and the inside is filled with sealing filler 14; the outer ring of the supporting tube 9 is provided with threads, the outer diameter of the supporting tube is slightly smaller than the inner diameter of the lining tube 8, when the upper clamp 4 and the lower clamp 10 are connected and locked, the lining tube 8 is pressed down, the sealing filler 14 in the tooth-shaped groove on the clamp 4 is pressed, meanwhile, the lining tube 8 is pressed towards the supporting tube 9, and the outer surface of the supporting tube 9 is provided with threads, so that the axial displacement of the supporting tube is limited.
Working principle:
when fluid leaks between the pipeline 1 and the lining pipe 8, as shown by an arrow in fig. 2, the leaked fluid sequentially enters the cavity where the elastic piece 12 is located through the connecting pipe axial groove 303, the connecting pipe radial groove 302, the connecting pipe annular groove 301, the upper clamp axial hole 403, the upper valve seat radial hole 1101 and the through hole on the upper valve seat 11, and the fluid pressure acts on the upper part of the elastic piece 12; the fluid pressure inside the liner tube 8 acts on the lower part of the elastic member 12 through the support tube 9, the liner tube 8 and the through holes in the upper valve seat 4. If the fluid pressure between the metal pipeline 1 and the lining pipe 8 is greater than the fluid pressure inside the lining pipe 8, the elastic piece 12 is pressed down, and the fluid between the metal pipeline 1 and the lining pipe 8 enters the inside of the lining pipe 8 through the upper clamping hoop annular groove 402 and the upper clamping hoop radial groove 401, so that pressure relief is realized, and the inner and outer pressure differences of the lining pipe 8 are avoided to cause the collapse of the lining pipe 8. If the fluid pressure between the metal pipeline 1 and the lining pipe 8 is smaller than the fluid pressure in the lining pipe 8, the elastic piece 12 is pressed upwards to block the through hole in the center of the upper valve seat 11, and the isolation of the fluid is realized by virtue of the sealing structure of each part.
On the other hand, the embodiment also provides an installation method based on the device for eliminating the negative pressure of the lining nonmetallic tube, which comprises the following specific steps:
s1, cutting a certain position of a metal pipeline to be repaired, and reserving installation spaces for connecting the pipeline and the upper and lower clamps.
S2, cleaning, removing thorns, removing tumors and the like of the pipeline to be repaired.
And S3, connecting the connecting pipeline with the pipeline to be repaired, and keeping certain neutrality in the connecting process.
S4, carrying out multistage compression on the HTPO lining pipe, dragging the HTPO lining pipe into a pipeline to be repaired by using a traction device, and placing the supporting pipe into the lining pipe after the shape of the HTPO lining pipe is recovered.
S5, centering the pipelines at the two ends, and fixing the centered pipelines.
And S6, installing the upper and lower clamps, temporarily not screwing the nuts, and drilling the inner liner tube and the support tube by referring to the positions of the through holes of the upper clamp to manufacture a fluid flow passage in the inner liner tube.
And S7, installing a lower valve seat, an elastic body, an upper valve seat, sealing elements and valve body end covers, and locking the upper and lower clamps after the valve body end covers are locked.
The above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (8)
1. An apparatus for relieving negative pressure in a lined nonmetallic tube, comprising: the pipeline (1), the connecting pipeline (3), the upper clamp (4), the lining pipe (8), the supporting pipe (9), the lower clamp (10) and the check valve structure;
the pipeline (1) comprises a first pipeline (101) and a second pipeline (102), and the end parts of the two pipelines are fixedly connected with the two ends of the connecting pipeline (3) respectively; the inner diameter of the pipeline (1) is d 1 The inner diameter of the connecting pipeline (3) is d 2 And d 1 ＝d 2 ；
An annular opening is formed in the connecting pipeline (3), and the upper clamp (4) and the lower clamp (10) are installed at the opening; the upper clamp (4) and the lower clamp (10) are connected into an annular structure through bolts;
the lining pipe (8) is made of nonmetal materials, and the outer wall of the lining pipe (8) is in contact with the inner walls of the pipeline (1) and the connecting pipeline (3); the inner wall of the lining pipe (8) is also provided with the supporting pipe (9), and the axial installation position of the supporting pipe (9) is consistent with the axial positions of the upper clamp (4) and the lower clamp (10);
the check valve structure is arranged in the upper clamp (4); the upper end of the upper clamp (4) is provided with a two-stage stepped hole, and the check valve structure is arranged in the stepped hole; the check valve structure comprises a valve body end cover (5), an upper valve seat (11), a lower valve seat (13) and an elastic piece (12);
the upper part of the step hole is covered with the valve body end cover (5); the middle part of the step hole is sequentially provided with an upper valve seat (11) and a lower valve seat (13); a cavity structure is reserved at the joint of the upper valve seat (11) and the lower valve seat (13), and an elastic piece (12) is arranged in the cavity; one way of the check valve structure is communicated with the inside of the pipeline, and the other way is communicated with the joint of the lining pipe (8) and the connecting pipeline (3);
the connecting pipe annular groove (301) on the connecting pipe (3) is communicated with the upper clamp axial hole (403) on the upper clamp (4), and the connecting pipe annular groove (301) is communicated to the joint of the lining pipe (8) and the connecting pipe (3) through at least one connecting pipe radial groove (302); connecting pipe axial grooves (303) are formed in the joint of the lining pipe (8) and the connecting pipe (3) along the inner wall of the connecting pipe (3), and the connecting pipe axial grooves (303) are in one-to-one correspondence with the connecting pipe radial grooves (302); the tail end of the connecting pipe axial groove (303) is communicated with the connecting pipe radial groove (302);
the center of the upper valve seat (11) is provided with a through hole along the axial direction and is communicated with the upper clamp axial holes (403) on two sides through an upper valve seat radial hole (1101).
2. The device according to claim 1, characterized in that the contact part of the connecting pipe (3) with the clamping band is provided with at least two annular grooves, and a second sealing ring (7) is arranged in the annular grooves; and the end parts of the first pipeline (101) and the second pipeline (102) are fixedly provided with mounting flanges (2) and are connected with the two ends of the connecting pipeline (3) through bolts.
3. The device according to claim 1, characterized in that the end face of the upper valve seat (11) in contact with the lower valve seat (13) is machined with at least one annular groove, and in which a first sealing ring (6) is mounted; at least one annular groove is formed in the bottom surface of the inner side of the stepped hole, and a first sealing ring (6) is arranged in the annular groove.
4. The device according to claim 1, wherein the center of the lower valve seat (13) is provided with a through hole which is communicated with the bottom through hole of the step hole, and through holes are arranged at corresponding positions of the lining pipe (8) and the supporting pipe (9) so that the cavity is communicated with the inside of the pipeline; the upper end of the through hole of the lower valve seat (13) is processed into a counter bore structure, and the elastic piece (12) is installed.
5. The device according to claim 4, wherein an upper clamping hoop annular groove (402) is circumferentially arranged outside the bottom through hole of the step hole, and the upper clamping hoop annular groove (402) is communicated with the bottom through hole through at least one upper clamping hoop radial groove (401); the upper end face of the lower valve seat (13) is uniformly distributed with a plurality of lower valve seat axial holes (1301) around the through hole, and the lower valve seat axial holes (1301) are communicated with the upper clamping hoop annular groove (402).
6. The device according to claim 1, characterized in that the interface of the upper clamp (4) with the liner tube (8) is provided with a sealing structure and filled with a sealing filler (14).
7. A method for installing a device for eliminating negative pressure of a non-metal pipe lining, which is suitable for the device for eliminating negative pressure of a non-metal pipe lining according to any one of claims 1 to 6, and is characterized by comprising the following specific steps:
s1, cutting a pipeline to be repaired, and reserving installation spaces for connecting the pipeline and the upper and lower clamps;
s2, cleaning, removing thorns and removing tumors of the pipeline to be repaired;
s3, connecting the connecting pipeline with the pipeline to be repaired, and keeping neutral in the connecting process;
s4, carrying out multistage compression on the lining pipe, dragging the lining pipe into the pipeline to be repaired by using a traction device, and putting a supporting pipe into the lining pipe after the shape of the lining pipe is recovered;
s5, centering the pipelines at the two ends, and fixing the centered pipelines;
s6, installing an upper clamp and a lower clamp, temporarily not screwing a nut, drilling the inner liner tube and the support tube by referring to the position of the through hole of the upper clamp, and manufacturing a fluid flow passage in the check valve structure;
and S7, installing the check valve structure and the sealing element, and locking the upper clamp and the lower clamp after the check valve structure and the sealing element are fastened.
8. A fluid transport conduit comprising a device for relieving negative pressure from a lined nonmetallic tube as defined in any one of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011186952.9A CN114427633B (en) | 2020-10-29 | 2020-10-29 | Device for eliminating negative pressure of non-metal pipe lining and installation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011186952.9A CN114427633B (en) | 2020-10-29 | 2020-10-29 | Device for eliminating negative pressure of non-metal pipe lining and installation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114427633A CN114427633A (en) | 2022-05-03 |
| CN114427633B true CN114427633B (en) | 2024-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011186952.9A Active CN114427633B (en) | 2020-10-29 | 2020-10-29 | Device for eliminating negative pressure of non-metal pipe lining and installation method |
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| CN (1) | CN114427633B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009061042A1 (en) * | 2007-11-05 | 2009-05-14 | Gye Myeong Co., Ltd. | Pipe clamp with pipe branch |
| CN201651449U (en) * | 2009-11-13 | 2010-11-24 | 刘仁俤 | Noise abatement check-valve for clamp connection |
| CN103008375A (en) * | 2012-12-20 | 2013-04-03 | 保定市金迪双维管道内衬技术有限公司 | Stainless steel liner necking machine for pipelines |
| CN202992285U (en) * | 2012-09-11 | 2013-06-12 | 云南磷化集团有限公司 | Check valve with liner |
| CN205136690U (en) * | 2015-11-19 | 2016-04-06 | 哈尔滨恒通排水设备制造股份有限公司 | Single deck tape -recorder hoop fast -assembling check valve |
| CN205534721U (en) * | 2016-03-22 | 2016-08-31 | 潘汝 | Metal pipeline connecting device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10774973B2 (en) * | 2017-11-01 | 2020-09-15 | Jeffrey M. Tanner | Pipe liner re-flaring system and method |
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2020
- 2020-10-29 CN CN202011186952.9A patent/CN114427633B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009061042A1 (en) * | 2007-11-05 | 2009-05-14 | Gye Myeong Co., Ltd. | Pipe clamp with pipe branch |
| CN201651449U (en) * | 2009-11-13 | 2010-11-24 | 刘仁俤 | Noise abatement check-valve for clamp connection |
| CN202992285U (en) * | 2012-09-11 | 2013-06-12 | 云南磷化集团有限公司 | Check valve with liner |
| CN103008375A (en) * | 2012-12-20 | 2013-04-03 | 保定市金迪双维管道内衬技术有限公司 | Stainless steel liner necking machine for pipelines |
| CN205136690U (en) * | 2015-11-19 | 2016-04-06 | 哈尔滨恒通排水设备制造股份有限公司 | Single deck tape -recorder hoop fast -assembling check valve |
| CN205534721U (en) * | 2016-03-22 | 2016-08-31 | 潘汝 | Metal pipeline connecting device |
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| CN114427633A (en) | 2022-05-03 |
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