CN111350889A

CN111350889A - Corrosion-resistant corrugated pipe for natural gas conveying

Info

Publication number: CN111350889A
Application number: CN202010173424.3A
Authority: CN
Inventors: 范丹丹
Original assignee: Shanghai Aslang Technology Co ltd
Current assignee: Ningbo Yuyao Pipe Co.,Ltd.
Priority date: 2020-03-13
Filing date: 2020-03-13
Publication date: 2020-06-30
Anticipated expiration: 2040-03-13
Also published as: CN111350889B

Abstract

The invention belongs to the technical field of corrugated pipes, and particularly relates to a corrosion-resistant corrugated pipe for natural gas transportation; the outer surface of the long pipe is sleeved with joints at two ends of the long pipe; the long tube comprises an elastic hose; the elastic hose is made of an anti-corrosion material; the outer surface of the elastic hose is fixedly connected with arc-shaped blocks which are uniformly distributed, and the arc-shaped blocks which are uniformly distributed are mutually attached to form a circular tube; a first sliding groove is formed in one side end face of each arc-shaped block; the end face of the other side of each arc-shaped block is fixedly connected with a first sliding block, and the first sliding blocks are arranged in the first sliding grooves and are in sliding connection with the first sliding grooves; the corrugated pipe is mainly used for solving the problems that the existing corrugated pipe has a single structure, most of the corrugated pipes adopt a single-layer corrugated pipe structure, the corrugated pipe has various defects of poor corrosion resistance, poor pressure resistance, easy abrasion and the like, and when the corrugated pipe is used, cracks or abrasion and corrosion are easy to generate, damage is easy to generate, and the service life of the corrugated pipe is shortened.

Description

Corrosion-resistant corrugated pipe for natural gas conveying

Technical Field

The invention belongs to the technical field of corrugated pipes, and particularly relates to a corrosion-resistant corrugated pipe for natural gas conveying.

Background

The corrugated pipe is a tubular elastic sensitive element which is formed by connecting foldable corrugated sheets along the folding and stretching direction. The corrugated pipe has wide application in instruments and meters, and is mainly used as a measuring element of a pressure measuring instrument to convert pressure into displacement or force. The corrugated pipe has thin pipe wall and high sensitivity, and the measurement range is from tens of Pa to tens of MPa. Its open end is fixed, its sealed end is in free state, and its elasticity is increased by using auxiliary helical spring or reed. When working, the pipe is extended along the length direction under the action of internal pressure, so that the movable end generates displacement in a certain relation with the pressure. The movable end drives the pointer to directly indicate the pressure. The corrugated pipe mainly comprises a metal corrugated pipe, a corrugated expansion joint, a corrugated heat exchange pipe, a diaphragm capsule, a metal hose and the like. The metal corrugated pipe is mainly applied to the effects of compensating the thermal deformation of a pipeline, damping, absorbing the settlement deformation of the pipeline and the like, and is widely applied to the industries of petrifaction, instruments, aerospace, chemical industry, electric power, cement, metallurgy and the like. For the introduction of corrosion resistant corrugated pipes, reference is made to the journal: song Bo, Huang Yang, development of HDPE/CF composite double-walled bellows, new building material; however, the corrosion-resistant corrugated pipe for natural gas transportation still has certain problems, including the following aspects:

the existing corrugated pipe has a single structure, most of corrugated pipes adopt a single-layer corrugated pipe structure, the corrugated pipe has the defects of poor corrosion resistance, poor pressure resistance, easy abrasion and the like, when in use, cracks, abrasion and corrosion are easy to generate, damage is easy to generate, the service life of the corrugated pipe is reduced, and meanwhile, the problem of explosion is easy to generate due to the fact that the corrugated pipe is weak in elasticity when the corrugated pipe is blocked or extruded, for example, patent No. 201410233991.8, the patent name is an anticorrosive antibacterial corrugated pipe, but the technical scheme can not solve the problem of easy generation of damage.

In view of the above, in order to overcome the above technical problems, the present inventors have designed and developed a corrosion-resistant corrugated pipe for natural gas transportation, and manufactured a special corrosion-resistant corrugated pipe for natural gas transportation, thereby solving the above technical problems.

Disclosure of Invention

In order to make up for the defects of the prior art, the invention provides the corrosion-resistant corrugated pipe for conveying natural gas, which is mainly used for solving the problems that the existing corrugated pipe has a single structure, most of the corrugated pipes adopt a single-layer corrugated pipe structure, the corrugated pipe has various defects of poor corrosion resistance, poor pressure resistance, easy abrasion and the like, and when the corrugated pipe is used, cracks or abrasion and corrosion are easy to generate, damage is easy to generate, and the service life of the corrugated pipe is shortened.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a corrosion-resistant corrugated pipe for natural gas transportation, which comprises a long pipe and a joint; the outer surface of the long pipe is sleeved with joints at two ends of the long pipe; the long tube comprises an elastic hose; the elastic hose is made of an anti-corrosion material; the outer surface of the elastic hose is fixedly connected with arc-shaped blocks which are uniformly distributed, and the arc-shaped blocks which are uniformly distributed are mutually attached to form a circular tube; a first sliding groove is formed in one side end face of each arc-shaped block; the end face of the other side of each arc-shaped block is fixedly connected with a first sliding block, and the first sliding blocks are arranged in the first sliding grooves and are in sliding connection with the first sliding grooves; an elastic layer is fixedly connected to the outer surface of the arc-shaped pipe above the end face of one side, attached to each other, of each arc-shaped block in pairs, and the elastic layer is made of an anticorrosive material; a first protective pipe is arranged on one side of each elastic layer, which is opposite to the elastic layer; the inner surface of the first protection pipe is fixedly connected with first arc-shaped pieces which are uniformly arranged through supporting rods, and the first arc-shaped pieces are designed to be elastic; a second arc-shaped sheet is fixedly connected to one side, opposite to each first arc-shaped sheet, and each second arc-shaped sheet is wrapped by an elastic layer; the outer surface of the first protection pipe is fixedly connected with a second protection pipe, and the second protection pipe is made of a metal anti-corrosion material; when the corrugated pipe is in work, the elastic hose is made of an anti-corrosion material, when the corrugated pipe is used for conveying natural gas, the elastic soft layer can prevent the natural gas from corroding the corrugated pipe, so that the service life of the corrugated pipe is shortened, the elastic hose has certain elasticity, when the air pressure in the corrugated pipe is too high, the elastic hose can expand, so that the extrusion force of the natural gas on the corrugated pipe can be relieved, the service life of the corrugated pipe is prolonged, because the arc-shaped blocks which are uniformly arranged are all connected with the first sliding groove in a sliding manner through the first sliding groove and the first sliding block, the arc-shaped blocks which are uniformly arranged can be extruded in the expansion process of the elastic hose, when the arc-shaped blocks are extruded, the arc-shaped blocks are separated from each other, meanwhile, the arc-shaped blocks drive the first sliding block in the first sliding groove to slide outwards, the extrusion force on the, the elastic hose is prevented from being damaged, after the elastic hose is broken, the elastic layers are fixedly connected between every two arc-shaped blocks, so that natural gas can be prevented from flowing out of the arc-shaped blocks to corrode the corrugated pipe, the second arc-shaped sheets are arranged above each elastic layer, when the arc-shaped blocks expand and expand outwards, the second arc-shaped sheets can be attached to the surfaces of the arc-shaped blocks, so that extrusion force applied to the elastic layers can be relieved, meanwhile, corrosion of the corrugated pipe caused by natural gas leakage can be prevented, when the elastic layers are broken, the elastic layers can be wrapped by the second arc-shaped sheets, so that natural gas leakage is prevented, in the process that the arc-shaped blocks extrude the second arc-shaped sheets, the first arc-shaped sheets can support the second arc-shaped sheets through air passages, so that the second arc-shaped sheets are prevented from being insufficiently contacted with the arc-shaped blocks, natural gas is prevented, the second protection pipe is made of a metal anti-corrosion material, so that the outer surface of the corrugated pipe can be prevented from being corroded by the external environment, when the inner diameter of the pipe opening of the corrugated pipe is narrowed or extruded, the corrugated pipe manufactured by the invention can expand through a self protection mechanism, so that the extrusion force applied to the corrugated pipe can be reduced, the corrugated pipe is prevented from exploding, and meanwhile, the corrugated pipe is easier to find after being expanded, so that the corrugated pipe can be quickly overhauled to avoid major accidents.

Preferably, the inner surface of the joint is of a "Z" shaped design; second sliding grooves are uniformly arranged in the inner wall of the joint, and second sliding blocks are connected in the second sliding grooves in a sliding mode through springs; a supporting plate is hinged to the right side of each second sliding block; bolts are hinged to the opposite sides of the supporting plates, and extend out of the joint; a third sliding groove is formed in the inner wall of each supporting plate, and a third sliding block is connected in each third sliding groove in a sliding mode through a spring; when the connector is required to be clamped, the connector is firstly sleeved into the corrugation of the corrugated pipe, when a second sliding block in the connector is contacted with the corrugated pipe, the second sliding block slides towards a second sliding groove under the extrusion of the corrugated pipe, when the second sliding block passes through the corrugation on the corrugated pipe, the second sliding block slides outwards under the extrusion of the spring, after sliding out, the second sliding block can be clamped into a groove on the outer surface of the corrugated pipe, meanwhile, the bolt is rotated anticlockwise, the supporting plate can be driven to move outwards in the process of rotating the bolt, when a third sliding block connected with the supporting plate in a sliding way is contacted with the inner wall of the corrugated pipe, the bolt is continuously rotated, as the third sliding block is pressed to slide towards the third sliding groove, and meanwhile, the second sliding block also slides towards the second sliding groove, when the bolt rotates to a proper position, the rotation is stopped, so that the connector can be installed on the corrugated pipe, and, thereby saving time and labor.

Preferably, a first air bag is fixedly connected between every two second sliding blocks; each first air bag is communicated with the second sliding groove and the third sliding groove through air pipes; the during operation, because first gasbag all communicates with second spout and third gasbag through the trachea, when second slider and third slider slide in second spout and third spout, can follow the trachea with the gas in second spout and the third spout and impress in the first gasbag, after gas inflow first gasbag, first gasbag begins the inflation, can fill in the ripple of bellows at the in-process of first gasbag inflation, can seal the joint at this in-process, thereby prevent that the natural gas from flowing out the polluted environment in the joint gap.

Preferably, the first sliding grooves are fixedly connected with plug rods which are uniformly distributed; the inner wall of each first sliding block is provided with slots which are uniformly distributed, and the slots are internally and slidably connected with check blocks through springs; the right side of each slot is fixedly connected with the outer surface of the first sliding block through a second air bag which is communicated with the slot; the during operation, at the gliding in-process of first slider in first spout, the inserted bar in the first spout can insert in the slot, can extrude the dog when the inserted bar inserts in the slot, because slot and second gasbag intercommunication, can impress the second gasbag with the gas in the slot in the dog is gliding, after gas inflow second gasbag, the second gasbag begins the inflation, can plug up the slot at the expanded in-process of second gasbag, thereby prevent that the natural gas from flowing out from the gap of slot, thereby corrode the bellows inner wall.

Preferably, the opposite side of each second arc-shaped sheet is fixedly connected with third air bags which are uniformly arranged on the inner surface of the second arc-shaped sheet; during operation, because the opposite side of the second arc piece is fixedly connected with the third air grooves which are uniformly arranged, when the arc block extrudes the second arc piece, the third air grooves can be attached to the arc block, thereby further sealing the arc block and preventing natural gas from flowing out of the gap to corrode the corrugated pipe.

Preferably, a fourth sliding groove is formed in the inner wall of the first protection tube on the back side of each first arc-shaped sheet, a fourth sliding block is connected in the fourth sliding groove in a sliding manner, and each fourth sliding block is fixedly connected with the first arc-shaped sheet through a support rod; an elongated slot is formed in the inner wall of each fourth sliding block and communicated with a third air bag, and each support rod is connected with the elongated slot in a sliding mode through a spring; when the gas-tight sealing device works, in the process that the arc-shaped block extrudes the second arc-shaped piece, the second arc-shaped piece can push the first arc-shaped piece to move outwards, the supporting rod can be extruded to slide towards the long groove in the process that the first arc-shaped piece moves outwards, so that the extrusion force applied to the second arc-shaped piece can be relieved.

The invention has the following beneficial effects:

1. according to the invention, by arranging the inserting rod and the slot, when the first sliding block slides in the first sliding groove, the inserting rod in the first sliding groove can be inserted into the slot, the stop block can be extruded when the inserting rod is inserted into the slot, the slot is communicated with the second air bag, the gas in the slot can be pressed into the second air bag when the stop block slides, after the gas flows into the second air bag, the second air bag starts to expand, and the slot can be blocked in the expansion process of the second air bag, so that the natural gas is prevented from flowing out from the gap of the slot, and the inner wall of the corrugated pipe is corroded.

2. According to the invention, the fourth sliding groove is arranged, so that the second arc piece can push the first arc piece to move outwards in the process that the arc-shaped block extrudes the second arc piece, the supporting rod can be extruded to slide towards the long groove in the process that the first arc piece moves outwards, the extrusion force applied to the second arc piece can be relieved, the long groove is communicated with the third air bag, and the gas in the long groove can be pressed into the third air bag in the process that the supporting rod slides in the long groove, so that the expansion degree of the third air bag can be improved, meanwhile, the arc-shaped block can be further sealed, natural gas leakage is prevented, the supporting rod is fixedly connected with the fourth sliding block in the fourth sliding groove, and when the second arc piece is damaged, the fourth sliding block can be directly taken out and replaced by a new second arc piece.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a body diagram of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is an enlarged view of a portion of FIG. 3 at B;

FIG. 5 is a cross-sectional view of the joint of the present invention;

FIG. 6 is a cross-sectional view taken at C-C of FIG. 5;

in the figure: the device comprises a long pipe 1, an elastic hose 11, an arc block 12, a first sliding groove 13, a first sliding block 14, an inserted bar 15, a slot 16, a stop block 17, a second air bag 18, an elastic layer 19, a first protection pipe 191, a first arc piece 192, a second arc piece 193, a third air bag 194, a fourth sliding groove 195, a fourth sliding block 196, a support rod 197, a long groove 198, a second protection pipe 199\ connector 2, a second sliding groove 21, a second sliding block 22, a support plate 23, a bolt 24, a third sliding groove 25, a third sliding block 26 and a first air bag 27.

Detailed Description

A corrosion-resistant corrugated pipe for natural gas transportation according to an embodiment of the present invention will be described below with reference to fig. 1 to 6.

As shown in fig. 1-6, the corrosion-resistant corrugated pipe for natural gas transportation according to the present invention includes a long pipe 1 and a joint 2; the outer surface of the long pipe 1 is sleeved with the joints 2 at the two ends of the long pipe 1; the long tube 1 comprises an elastic hose 11; the elastic hose 11 is made of an anti-corrosion material; the outer surface of the elastic hose 11 is fixedly connected with arc-shaped blocks 12 which are uniformly arranged, and the arc-shaped blocks 12 which are uniformly arranged are mutually attached to form a circular tube; a first sliding chute 13 is formed in one side end face of each arc-shaped block 12; a first sliding block 14 is fixedly connected to the end face of the other side of each arc-shaped block 12, and the first sliding blocks 14 are arranged in the first sliding grooves 13 and are in sliding connection with the first sliding grooves 13; an elastic layer 19 is fixedly connected to the outer surface of the arc-shaped pipe above the end face of one side, attached to each two of the arc-shaped blocks 12, of each arc-shaped block, and the elastic layers 19 are made of an anticorrosive material; a first protective tube 191 is arranged on the opposite side of each elastic layer 19; the inner surface of the first protection tube 191 is fixedly connected with first arc-shaped pieces 192 which are uniformly arranged through supporting rods 197, and the first arc-shaped pieces 192 are designed to be elastic; the opposite side of each first arc-shaped piece 192 is fixedly connected with a second arc-shaped piece 193, and the second arc-shaped pieces 193 are wrapped by elastic layers 19; the outer surface of the first protection pipe 191 is fixedly connected with a second protection pipe 199, and the second protection pipe 199 is made of a metal anti-corrosion material; when the corrugated pipe is in operation, the elastic hose 11 is made of anticorrosive material, when the corrugated pipe is in the process of conveying natural gas, the elastic hose 11 can prevent the natural gas from corroding the corrugated pipe, so that the service life of the corrugated pipe is shortened, because the elastic hose 11 has certain elasticity, when the air pressure in the corrugated pipe is too high, the elastic hose 11 can expand, so that the extrusion force of the natural gas on the corrugated pipe can be relieved, the service life of the corrugated pipe is prolonged, because the arc blocks 12 which are uniformly arranged are all connected in a sliding manner through the first sliding grooves 13 and the first sliding blocks 14, the arc blocks 12 which are uniformly arranged can be extruded in the expansion process of the elastic hose 11, when the arc blocks 12 are extruded, the arc blocks 12 start to separate from each other, meanwhile, the arc blocks 12 drive the first sliding blocks 14 in the first sliding grooves 13 to slide outwards, and the extrusion force on the corrugated pipe can be further relieved in the, meanwhile, the elastic hose 11 can be protected, the elastic hose 11 is prevented from being damaged, after the elastic hose 11 is broken, the elastic layers 19 are fixedly connected between every two arc-shaped blocks 12, so that natural gas can be prevented from flowing out of the arc-shaped blocks 12 to corrode the corrugated pipe, the second arc-shaped sheets 193 are arranged above each elastic layer 19, when the arc-shaped blocks 12 expand and expand outwards, the second arc-shaped sheets 193 can be attached to the surfaces of the arc-shaped blocks 12, so that the extrusion force on the elastic layers 19 can be relieved, meanwhile, the corrugated pipe can be prevented from being corroded due to natural gas leakage, when the elastic layers 19 are broken, the elastic layers 19 can be wrapped by the second arc-shaped sheets 193, so that the natural gas is prevented from leaking, in the process that the arc-shaped blocks 12 extrude the second arc-shaped sheets 193, the first arc-shaped sheets 192 can support the action of the second arc-shaped sheets 193 through an air passage, so that the second arc-shaped, the second protection pipe 199 is made of a metal anti-corrosion material, so that the outer surface of the corrugated pipe can be prevented from being corroded by the external environment, when the corrugated pipe is thinned or extruded when the inner diameter of the pipe opening is blocked, the corrugated pipe manufactured by the corrugated pipe manufacturing method can be expanded through a protection mechanism of the corrugated pipe, so that the extrusion force applied to the corrugated pipe can be reduced, the corrugated pipe is prevented from being exploded, and meanwhile, the corrugated pipe is easier to find after being expanded, so that the corrugated pipe can be quickly overhauled to avoid major accidents.

As an embodiment of the invention, the inner surface of the joint 2 is of a "Z" shaped design; second sliding grooves 21 are uniformly arranged in the inner wall of the joint 2, and second sliding blocks 22 are connected in the second sliding grooves 21 in a sliding mode through springs; a support plate 23 is hinged to the right side of each second sliding block 22; a bolt 24 is hinged to one side of each support plate 23 opposite to the other side, and the bolt 24 extends out of the joint 2; a third sliding groove 25 is formed in the inner wall of each supporting plate 23, and a third sliding block 26 is connected in the third sliding groove 25 in a sliding manner through a spring; when the connector 2 needs to be clamped, the connector 2 is firstly sleeved into the corrugation of the corrugated pipe, when the second slider 22 in the connector 2 is in contact with the corrugated pipe, the second slider 22 slides towards the second sliding groove 21 under the extrusion of the corrugated pipe, when the second slider 22 passes through the corrugation on the corrugated pipe, the second slider 22 slides outwards under the extrusion of the spring, after the second slider 22 slides out, the second slider can be clamped into the groove on the outer surface of the corrugated pipe, the bolt 24 is simultaneously rotated anticlockwise, the support plate 23 can be driven to move outwards in the process of rotating the bolt 24, when the third slider 26 connected with the support plate 23 in a sliding way is in contact with the inner wall of the corrugated pipe, the bolt 24 is continuously rotated, because the third slider 26 slides towards the third sliding groove 25 under the extrusion force, and the second slider 22 also slides towards the second sliding groove 21, when the bolt 24 rotates to a proper position, the rotation is stopped, so that the connector 2 can be installed on the corrugated, the installation is simple and the operation is convenient in the process, thereby saving time and labor.

As an embodiment of the present invention, a first air bag 27 is fixedly connected between every two second sliding blocks 22; each first air bag 27 is communicated with the second sliding groove 21 and the third sliding groove 25 through air pipes; during operation, because the first air bag 27 is communicated with the second sliding groove 21 and the third air bag 194 through the air pipe, when the second sliding block 22 and the third sliding block 26 slide in the second sliding groove 21 and the third sliding groove 25, the gas in the second sliding groove 21 and the third sliding groove 25 can be pressed into the first air bag 27 from the air pipe, after the gas flows into the first air bag 27, the first air bag 27 starts to expand, and the first air bag 27 can be filled in the corrugation of the corrugated pipe in the expansion process, so that the joint 2 can be sealed in the process, and the natural gas is prevented from flowing out of the gap of the joint 2 to pollute the environment.

As an embodiment of the present invention, each of the first sliding grooves 13 is fixedly connected with a uniformly arranged inserting rod 15; the inner wall of each first sliding block 14 is provided with slots 16 which are uniformly arranged, and the slots 16 are internally and slidably connected with stop blocks 17 through springs; the right side of each slot 16 is fixedly connected with the outer surface of the first sliding block 14 through a second air bag 18, the second air bags 18 are communicated with the slots (16; in operation, when the first sliding block 14 slides in the first sliding groove 13, the inserted rod 15 in the first sliding groove 13 can be inserted into the slot 16, when the inserted rod 15 is inserted into the slot 16, the stop block 17 can be extruded, because the slot 16 is communicated with the second air bags 18, the gas in the slot 16 can be pressed into the second air bags 18 when the stop block 17 slides, after the gas flows into the second air bags 18, the second air bags 18 begin to expand, and the slots 16 can be blocked in the expansion process of the second air bags 18, so that the natural gas is prevented from flowing out from gaps of the slots 16, and the inner walls of the corrugated pipes are corroded.

As an embodiment of the present invention, a third air cell 194 is fixedly connected to an inner surface of each second arc-shaped piece 193 at an opposite side of the second arc-shaped piece 193; during operation, because the opposite side of second arc piece 193 has linked firmly the third gas groove of evenly arranging, when arc piece 12 extruded second arc piece 193, the third gas groove can laminate with arc piece 12 to further sealed arc piece 12 prevents that the natural gas from flowing out the corrosion bellows in the gap.

As an embodiment of the present invention, a fourth sliding groove 195 is formed in an inner wall of the first protection tube 191 on a side of each first arc-shaped piece 192 opposite to the first arc-shaped piece, a fourth sliding block 196 is slidably connected to the fourth sliding groove 195, and each fourth sliding block 196 is fixedly connected to the first arc-shaped piece 192 through a supporting rod 197; an elongated slot 198 is formed in the inner wall of each fourth sliding block 196, the elongated slots 198 are communicated with the third air bag 194, and each supporting rod 197 is connected with the elongated slot 198 in a sliding mode through a spring; when the gas-tight sealing device works, in the process that the arc-shaped block 12 extrudes the second arc-shaped piece 193, the second arc-shaped piece 193 can push the first arc-shaped piece 192 to move outwards, and the supporting rod 197 can be extruded to slide in the long groove 198 in the process that the first arc-shaped piece 192 moves outwards, so that the extrusion force applied to the second arc-shaped piece 193 can be relieved, because the long groove 198 is communicated with the third gas bag 194, the gas in the long groove 198 can be pressed into the third gas bag 194 in the process that the supporting rod 197 slides in the long groove 198, the expansion degree of the third gas bag 194 can be improved, meanwhile, the arc-shaped block 12 can be further sealed, natural gas leakage is prevented, because the supporting rod 197 is fixedly connected with the fourth sliding block 196 in the fourth sliding groove 195, and when the second arc-shaped piece 193 is damaged, the fourth sliding block 196 can be directly taken out and replaced by a new second arc.

The specific working process is as follows:

when the corrugated pipe is in operation, the elastic hose 11 is made of an anti-corrosion material, when the corrugated pipe is used for conveying natural gas, the elastic hose 11 can prevent the natural gas from corroding the corrugated pipe, when the air pressure in the corrugated pipe is too high, the elastic hose 11 can expand, because the arc blocks 12 which are uniformly arranged are all in sliding connection with the first sliding blocks 14 through the first sliding grooves 13, the arc blocks 12 which are uniformly arranged can be extruded in the expansion process of the elastic hose 11, when the arc blocks 12 are extruded, the arc blocks 12 are separated from each other, and simultaneously the arc blocks 12 drive the first sliding blocks 14 in the first sliding grooves 13 to slide outwards, the extrusion force on the corrugated pipe can be further relieved in the process, the elastic hose 11 can be protected, when the elastic hose 11 is broken, because the arc blocks 12 are all elastically fixedly connected with the layer 19, thereby preventing the natural gas from flowing out of the arc-shaped blocks 12 to corrode the corrugated pipe, and because the second arc-shaped sheets 193 are arranged above each elastic layer 19, when the arcuate segments 12 expand and expand outwardly, the second arcuate tab 193 may engage the surface of the arcuate segments 12, thereby relieving the extrusion force on the elastic layer 19 and simultaneously preventing the corrugated pipe from being corroded by the leakage of natural gas, when the elastic layer 19 is broken, the second arc-shaped piece 193 may wrap the elastic layer 19, thereby preventing leakage of natural gas, during the process that the arc block 12 presses the second arc piece 193, the first arc piece 192 can support the function of the second arc piece 193 by the air channel, thereby preventing the second arc-shaped piece 193 from insufficiently contacting with the arc-shaped block 12, causing the leakage of natural gas, thereby polluting the environment, since the second protection pipe 199 is made of a metal corrosion-resistant material, it is possible to prevent the external environment from corroding the outer surface of the corrugated pipe.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a natural gas is carried and is used anti corrosion bellows which characterized in that: comprises a long pipe (1) and a joint (2); the outer surface of the long pipe (1) is sleeved with the joints (2) at the two ends of the long pipe (1); the long tube (1) comprises an elastic hose (11); the elastic hose (11) is made of an anti-corrosion material; the outer surface of the elastic hose (11) is fixedly connected with arc-shaped blocks (12) which are uniformly arranged, and the arc-shaped blocks (12) which are uniformly arranged are mutually attached to form a circular tube; a first sliding chute (13) is formed in one side end face of each arc-shaped block (12); the end face of the other side of each arc-shaped block (12) is fixedly connected with a first sliding block (14), and the first sliding blocks (14) are arranged in the first sliding grooves (13) and are in sliding connection with the first sliding grooves (13); an elastic layer (19) is fixedly connected to the outer surface of the arc-shaped pipe above the end face of one side, attached to each other, of each arc-shaped block (12), and the elastic layer (19) is made of an anticorrosive material; a first protective pipe (191) is arranged on the opposite side of each elastic layer (19); the inner surface of the first protection pipe (191) is fixedly connected with first arc-shaped pieces (192) which are uniformly arranged through supporting rods (197), and the first arc-shaped pieces (192) are designed to be elastic; a second arc-shaped piece (193) is fixedly connected to one side, opposite to each first arc-shaped piece (192), of each first arc-shaped piece, and the elastic layer (19) is wrapped on each second arc-shaped piece (193); the outer surface of the first protection pipe (191) is fixedly connected with a second protection pipe (199), and the second protection pipe (199) is made of a metal anti-corrosion material.

2. The corrosion-resistant corrugated pipe for natural gas transportation according to claim 1, wherein: the inner surface of the joint (2) is designed in a Z shape; second sliding grooves (21) which are uniformly distributed are formed in the inner wall of the joint (2), and second sliding blocks (22) are connected in the second sliding grooves (21) in a sliding mode through springs; a support plate (23) is hinged to the right side of each second sliding block (22); bolts (24) are hinged to the opposite sides of the supporting plates (23), and the bolts (24) extend out of the joints (2); every third spout (25) have all been seted up in backup pad (23) inner wall, and all have third slider (26) through spring sliding connection in third spout (25).

3. The corrosion-resistant corrugated pipe for natural gas transportation according to claim 2, wherein: a first air bag (27) is fixedly connected between every two second sliding blocks (22); each first air bag (27) is communicated with the second sliding chute (21) and the third air bag (194) through air pipes.

4. The corrosion-resistant corrugated pipe for natural gas transportation according to claim 1, wherein: the first sliding grooves (13) are fixedly connected with plug-in rods (15) which are uniformly distributed; the inner wall of each first sliding block (14) is provided with uniformly distributed slots (16), and the slots (16) are internally and slidably connected with stop blocks (17) through springs; and the right side of each slot (16) is fixedly connected with the outer surface of the first sliding block (14) by a second air bag (18), and the second air bags (18) are communicated with the slots (16).

5. The corrosion-resistant corrugated pipe for natural gas transportation according to claim 1, wherein: and the opposite side of each second arc-shaped piece (193) is fixedly connected with third air bags (194) which are uniformly arranged on the inner surface of the second arc-shaped piece (193).

6. The corrosion-resistant corrugated pipe for natural gas transportation according to claim 4, wherein: the inner surface of the joint (2) is designed in a Z shape; second sliding grooves (21) which are uniformly distributed are formed in the inner wall of the joint (2), and second sliding blocks (22) are connected in the second sliding grooves (21) in a sliding mode through springs; a support plate (23) is hinged to the right side of each second sliding block (22); bolts (24) are hinged to the opposite sides of the supporting plates (23), and the bolts (24) extend out of the joints (2); every third spout (25) have all been seted up in backup pad (23) inner wall, and all have third slider (26) through spring sliding connection in third spout (25).