CN109707927B - Leakage-proof device at joint of natural gas transportation pipeline and using method thereof - Google Patents
Leakage-proof device at joint of natural gas transportation pipeline and using method thereof Download PDFInfo
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- CN109707927B CN109707927B CN201811478304.3A CN201811478304A CN109707927B CN 109707927 B CN109707927 B CN 109707927B CN 201811478304 A CN201811478304 A CN 201811478304A CN 109707927 B CN109707927 B CN 109707927B
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Abstract
The invention discloses a natural gas transportation pipeline joint leakage-proof device and a use method thereof, belonging to the technical field of natural gas transportation, the natural gas transportation pipeline joint leakage-proof device comprises a sealing connecting ring, when a limit sealing ring is pressurized, the limit sealing ring can extend outwards to generate a phenomenon of being pressed more and more tightly by the application of a four-way compensation mechanism, thereby greatly improving the sealing performance of the pipeline joint, greatly reducing the possibility of natural gas leakage, simultaneously, when the natural gas flows stably in a pipeline, the extrusion force applied to the outside of the limit sealing ring is smaller, at the moment, under the action of a soft and hard modification mechanism, the outward extrusion force degree of the four-way compensation mechanism can be changed, the extrusion force degree in the limit sealing ring is also smaller, the limit sealing ring can not be always in a highly extruded state, thereby greatly prolonging the time of the limit sealing ring due to extrusion cracking, thereby reducing the maintenance frequency and cost of the natural gas pipeline in the later period.
Description
Technical Field
The invention relates to the technical field of natural gas transportation, in particular to a leakage-proof device at a natural gas transportation pipeline joint and a using method thereof.
Background
Natural gas is trapped in underground porous rock formations, including oil field gas, gas field gas, coal bed gas, mud volcanic gas, biogenic gas, and the like, and a small amount of natural gas is also released from the coal bed. It is a high-quality fuel and chemical raw material. The natural gas is mainly used as fuel, can be used for producing carbon black, chemicals and liquefied petroleum gas, and the propane and butane produced by the natural gas are important raw materials of modern industry. Natural gas is composed mainly of gaseous low molecular hydrocarbons mixed with non-hydrocarbon gases. Mainly composed of methane (85%) and small amounts of ethane (9%), propane (3%), nitrogen (2%) and butane (1%). Also known as "biogas". The catalyst is mainly used as fuel and also used as raw materials for producing chemical compounds such as acetaldehyde, acetylene, ammonia, carbon black, ethanol, formaldehyde, hydrocarbon fuel, hydrogenated oil, methanol, nitric acid, synthesis gas, vinyl chloride and the like. Natural gas is compressed into liquids for storage and transportation. Coal miners, nitric acid producers, power plant workers, organic chemical synthesis workers, gas users, petroleum refiners, and the like have access to the product. Mainly enters human body through respiratory tract. Belongs to a pure asphyxia gas. Hypoxia is caused by air replacement when the concentration is high, so that the respiration is short and the consciousness is lost; the serious patient may die due to hypoxemia suffocation. High pressure natural gas can cause frostbite. Incomplete combustion can produce carbon monoxide. The natural gas pipeline refers to a pipeline for conveying natural gas (including associated gas produced by an oil field) from a mining place or a processing plant to a city gas distribution center or an industrial enterprise user, and is also called a gas transmission pipeline. The natural gas pipeline is used for conveying natural gas, and is a way for conveying a large amount of natural gas on land. Natural gas pipelines account for about half of the total pipeline length in the world.
The natural gas exists with gaseous state when the transportation, however in the transportation, at the position that produces natural hydrate, can produce certain hindrance to the flow of gas, gas is after touchhing natural hydrate, gas can be in the phenomenon of violent disturbance such as pulsation turbulent flow, make natural gas line kneck can bear huge pressure, under this condition, the polytetrafluoroethylene sticky tape that current natural gas line kneck adopted seals can be by because of the sticky problem of sticky tape, and is burst open, thereby take place the gas leakage, not only can lead to the natural gas to leak, the waste of a large amount of resources is wasted, produce the threat to people's life and property safety simultaneously, the maintenance that has increaseed the later stage to natural gas line has put into simultaneously.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems in the prior art, the invention aims to provide a leakage-proof device at a natural gas transportation pipeline joint and a use method thereof, which can realize the leakage-proof device by using a four-way compensation mechanism, so that the limiting sealing ring can extend outwards when being pressed, and the phenomenon of pressing more and more is generated, thereby greatly improving the sealing performance at the pipeline interface, greatly reducing the possibility of natural gas leakage, meanwhile, when the natural gas flows stably in the pipeline, the extrusion force applied to the outside of the limiting sealing ring is smaller, and at the moment, under the action of the soft and hard modification mechanism, the outward extrusion degree of the four-way compensation mechanism can be changed, so that the extrusion degree of the inside of the limit sealing ring is smaller, the limit sealing ring can not be always in a highly extruded state, thereby very big extension the time of limiting seal ring because of extrusion fracture to reduce later stage natural gas line's maintenance frequency and cost.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
A leakage-proof device for a joint of a natural gas transportation pipeline comprises a sealing connecting ring, wherein the left end and the right end of the sealing connecting ring are both in threaded connection with pipeline bodies, a middle end fixedly connected with a limit sealing ring is arranged in the sealing connecting ring, the limit sealing ring is positioned between the two pipeline bodies, a fluff sealing layer is arranged between the pipeline bodies and the limit sealing ring, a cavity is arranged in the limit sealing ring, a four-way compensation mechanism is arranged in the cavity and comprises an elastic elliptical ball bag and a plurality of elastic semi-sealing pipes which are symmetrically distributed in a cross shape, the elastic semi-sealing pipes are all fixedly connected with the elastic elliptical ball bag, one end of each elastic semi-sealing pipe, which is far away from the elastic elliptical ball bag, is in extrusion contact with the inner wall of the cavity, a hardness denaturation mechanism is arranged in each elastic semi-sealing pipe, and the limit sealing ring can be applied, can extend to the outside, produce and press tight phenomenon more, thereby promote the leakproofness of pipeline kneck by a wide margin, very big reduction the possibility that natural gas leaked, simultaneously when the natural gas flows steadily in the pipeline, the outside extrusion force that receives of limiting seal ring is less, this moment under the effect of soft or hard degeneration mechanism, can change the outside extrusion pressure degree of quadriversal compensation mechanism, make the inside extrusion pressure degree of limiting seal ring also less, make limiting seal ring can not be in highly by the extrusion state always, thereby very big extension limiting seal ring is because of extrusion fracture's time, thereby reduce later stage natural gas pipeline's maintenance frequency and cost.
Further, the fine hair sealing layer includes that fine hair seals the pad, fine hair seals pad and spacing sealing ring fixed connection, and fine hair seals the pad and contacts with the mutual extrusion of pipeline body, and fine hair on the fine hair seals the pad can increase spacing sealing ring's sealed effect, makes to become the flexonics between spacing sealing ring and the pipeline body to increase substantially spacing sealing ring's sealed effect.
Furthermore, one end of the elastic semi-sealing pipe, which is close to the inner wall of the limiting sealing ring, is fixedly connected with a rigid fluff layer, the elastic semi-sealing pipe is in contact connection with the inner wall of the limiting sealing ring through the rigid fluff layer, and van der waals force is generated between the elastic semi-sealing pipe and the inner wall of the limiting sealing ring through the rigid fluff layer, so that the four-way compensation mechanism is positioned in the cavity and cannot move randomly to influence the sealing effect of the limiting sealing ring.
Furthermore, the fluff sealing gasket is made of silicification sheet-added type wool strips, and the fluff material on the fluff sealing gasket is a plastic film, so that the fluff sealing gasket can isolate the circulation of gas, the sealing performance is improved by more than five times, the friction is reduced, the durability is improved, and the sealing effect of the limiting sealing ring is better.
Furthermore, the density of the villus on the villus sealing gasket is 2800 and 3000 villus per square meter, and the large density of the villus makes the sealing effect of the villus sealing gasket more outstanding.
Further, the soft or hard degeneration mechanism includes the long bag of elasticity and degeneration reinforcing sleeve, and the degeneration reinforcing sleeve parcel is in the long bag outside of elasticity, the long bag of elasticity is close to the one end that the pipe was sealed to the elasticity is half sealed to the pipe and is communicated with each other, the long bag of elasticity is kept away from the one end that the pipe was sealed to the elasticity is half sealed and is sealed, and the condition of soft or hard degeneration can take place for the degeneration of degeneration reinforcing sleeve after the atress, can be by soft or hard to increase the bulk strength of soft or hard degeneration mechanism, make the extrusion force that quadriversal compensating mechanism produced limiting seal ring bigger, thereby improve limiting seal ring's sealing performance.
Furthermore, LINE-X coating is coated on the surfaces of the elastic elliptical ball bag and the elastic long bag, so that the elastic elliptical ball bag and the elastic long bag can have excellent tensile strength (up to 6600 pounds), the elastic elliptical ball bag and the elastic long bag cannot be easily damaged in the using process, the service lives of the four-way compensation mechanism and the soft and hard modification mechanism are prolonged, the use and the use of the limiting sealing ring are further prolonged, and the maintenance frequency and the cost of the natural gas pipeline in the later period are reduced.
Further, the degeneration uide bushing adopts the D3O material to make, make the degeneration uide bushing can be by soft stiffening rapidly after receiving power, thereby improve the hardness of soft or hard degeneration mechanism, thereby increase limiting seal ring's inside atress, the outside extension of limiting seal ring of being convenient for, increase the leakproofness, when the steady circulation of this internal natural gas of pipeline, the degeneration uide bushing receives that to come from limiting seal ring outside extrusion force less, make the less hardness that then hardens of degeneration uide bushing atress, then the internal pressure that limiting seal ring received is less, make limiting seal ring when the natural gas steadily circulates, can have a buffer phase, need not be in highly by the extrusion state all the time, thereby very big extension limiting seal ring is because of extrusion cracking's time, thereby reduce later stage natural gas line's maintenance frequency and cost.
Furthermore, the elastic elliptical balloon and the elastic long bag are filled with nitrogen or deionized water, when pressure from the outside of the limiting sealing ring is received, the nitrogen or the deionized water in the elastic elliptical balloon and the elastic long bag is compressed into the elastic long bag under stress by the original intangible shape, the shape of the elastic long bag can be propped up to improve the strength of the elastic long bag, meanwhile, the stress can be applied to the degeneration reinforcing sleeve through the propped elastic long bag, and the degeneration reinforcing sleeve is hardened under stress.
A natural gas transportation pipeline interface anti-leakage device comprises the following use methods:
step one, when gas in the pipeline body is disturbed, the pressure applied to the sealing connecting ring is increased;
secondly, the position, close to the interior of the pipeline body, of the limiting sealing ring is stressed and can be extruded towards the direction of the inner wall of the pipeline body;
step three, the four-way compensation mechanism is subjected to extrusion force in the vertical direction, and the elastic elliptical balloon is extruded in the vertical direction and transversely extruded and extended towards the left side and the right side;
step four, the filling objects in the elastic elliptical balloon and the elastic long balloon are also stressed, and the deformation reinforcing sleeve in the soft and hard deformation mechanism is stressed from soft to hard, so that the pressure is absorbed, the four-way compensation mechanism is protected, the strength of the soft and hard deformation mechanism is increased, and the extrusion force applied to the inside of the limiting sealing ring is increased;
fifthly, under the combined action of the internal extrusion pressure and the external extrusion pressure, the limiting sealing ring is transversely extended to generate an outward extrusion force;
step six, the fluff sealing gasket on the limiting sealing ring can be contacted with the pipeline body more tightly under the extrusion action of the limiting sealing ring, so that the sealing performance between the pipeline body and the limiting sealing ring is stronger.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) this scheme can be through quadriversal compensation mechanism's application, make spacing sealing ring when receiving pressure, can extend to the outside, produce and press tight phenomenon more, thereby promote the leakproofness of pipeline kneck by a wide margin, very big reduction the possibility that natural gas leaked, when natural gas flows steadily in the pipeline simultaneously, the outside extrusion force that receives of spacing sealing ring is less, this moment under the effect of soft or hard degeneration mechanism, can change the outside extrusion pressure degree of quadriversal compensation mechanism, make the inside extrusion pressure degree of spacing sealing ring also less, make spacing sealing ring can not be in highly by the extrusion state always, thereby very big extension spacing sealing ring is because of the time of extrusion fracture, thereby reduce later stage natural gas pipeline's maintenance frequency and cost.
(2) The fine hair sealing layer includes that fine hair seals the pad, and fine hair seals pad and spacing sealing ring fixed connection, and fine hair seals the pad and contacts with the mutual extrusion of pipeline body, and fine hair on the fine hair seals the pad can increase spacing sealing ring's sealed effect, makes to become the flexonics between spacing sealing ring and the pipeline body to increase substantially spacing sealing ring's sealed effect.
(3) One end of the elastic semi-sealing pipe close to the inner wall of the limiting sealing ring is fixedly connected with a rigid fluff layer, the elastic semi-sealing pipe is in contact connection with the inner wall of the limiting sealing ring through the rigid fluff layer, and van der Waals force is generated between the elastic semi-sealing pipe and the inner wall of the limiting sealing ring through the rigid fluff layer, so that the four-way compensation mechanism is positioned in the cavity, and the sealing effect of the limiting sealing ring cannot be influenced by random movement.
(4) The fluff sealing gasket adopts silicification adding piece type fluff strips, and the fluff material on the fluff sealing gasket is a plastic film, so that the fluff sealing gasket can isolate the circulation of gas, the sealing performance is improved by more than five times, the friction is reduced, the durability is improved, and the sealing effect of the limiting sealing ring is better.
(5) The density of the villus on the villus sealing gasket is 2800-.
(6) The soft or hard degeneration mechanism includes the long bag of elasticity and degeneration uide bushing, and the degeneration uide bushing parcel is in the long bag outside of elasticity, the long bag of elasticity is close to the half one end of sealing the pipe of elasticity and is managed with the half sealing of elasticity and communicate with each other, the long bag of elasticity is kept away from the half one end of sealing the pipe of elasticity and is sealed, the condition of soft or hard degeneration can take place for the degeneration of degeneration uide bushing behind the atress, can be by soft or hard, thereby increase the bulk strength of soft or hard degeneration mechanism, make the four-way compensating mechanism's the extrusion force that produces limiting seal ring bigger, thereby improve.
(7) LINE-X coating is coated on the surfaces of the elastic elliptical balloon and the elastic long balloon, so that the elastic elliptical balloon and the elastic long balloon can have excellent tensile strength (up to 6600 pounds), the elastic elliptical balloon and the elastic long balloon cannot be easily damaged in the using process, the service lives of the four-way compensation mechanism and the soft and hard degeneration mechanism are prolonged, the use and the use of the limiting sealing ring are further prolonged, and the maintenance frequency and the cost of a later-stage natural gas pipeline are reduced.
(8) The degeneration uide bushing adopts the D3O material to make, make the degeneration uide bushing can be by soft stiffening rapidly after receiving power, thereby improve the hardness of soft or hard degeneration mechanism, thereby increase the inside atress of spacing sealing ring, the outside extension of spacing sealing ring of being convenient for, increase the leakproofness, when this internal natural gas smooth circulation of pipeline, the degeneration uide bushing receives the extrusion force that comes from the outside of spacing sealing ring less, make the less hardness that then hardens of degeneration uide bushing atress less, then the internal pressure that spacing sealing ring received is less, make spacing sealing ring when natural gas smooth circulation, can have a buffering period, need not be in highly by the extrusion state always, thereby very big extension spacing sealing ring is because of the time of extrusion fracture, thereby reduce later stage natural gas line's maintenance frequency and cost.
(9) The long bag intussuseption of elasticity oval sacculus and elasticity is filled with nitrogen gas or deionized water, and when receiving the pressure that comes from the outside of spacing sealing ring, nitrogen gas or deionized water in the long bag of elasticity oval sacculus and elasticity is by original intangible, and the atress is compressed to the long bag of elasticity in, can prop up the shape of the long bag of elasticity and improve the intensity of the long bag of elasticity, can exert the atress on the degeneration reinforcing sleeve through the long bag of elasticity that is propped up simultaneously, and the time degeneration reinforcing sleeve atress sclerosis.
Drawings
FIG. 1 is a schematic sectional, three-dimensional structure of the present invention;
FIG. 2 is a schematic structural diagram of the front side of the present invention;
FIG. 3 is a schematic view of the structure at A in FIG. 2;
FIG. 4 is a schematic structural view of a cross section of a limit seal ring of the present invention;
fig. 5 is a schematic structural diagram of the soft and hard degeneration mechanism of the present invention.
The reference numbers in the figures illustrate:
the device comprises a pipeline body 1, a sealing connecting ring 2, a limiting sealing ring 3, a fluff sealing gasket 4, an elastic elliptical balloon 5, an elastic semi-sealed tube 6, an elastic long balloon 7 and a modified reinforcing sleeve 8.
Detailed Description
The drawings in the embodiments of the invention will be combined; the technical scheme in the embodiment of the invention is clearly and completely described; obviously; the described embodiments are only some of the embodiments of the invention; but not all embodiments, are based on the embodiments of the invention; all other embodiments obtained by a person skilled in the art without making any inventive step; all fall within the scope of protection of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
referring to fig. 1-2, a leakage preventing device for a joint of a natural gas transportation pipeline comprises a sealing connection ring 2, wherein the left end and the right end of the sealing connection ring 2 are both in threaded connection with pipeline bodies 1, a limit sealing ring 3 is fixedly connected to the middle end inside the sealing connection ring 2, and the limit sealing ring 3 is located between the two pipeline bodies 1.
Referring to fig. 3, a fluff sealing layer is arranged between the pipeline body 1 and the limiting sealing ring 3, the fluff sealing layer includes a fluff sealing pad 4, the fluff sealing pad 4 is fixedly connected with the limiting sealing ring 3, and the fluff sealing pad 4 is in mutual pressing contact with the pipeline body 1, the fluff on the fluff sealing pad 4 can increase the sealing effect of the limiting sealing ring 3, so that the limiting sealing ring 3 is in flexible contact with the pipeline body 1, thereby greatly improving the sealing effect of the limiting sealing ring 3, the fluff sealing pad 4 adopts a silicification patch type fluff strip, the material of the fluff on the fluff sealing pad 4 is a plastic film, so that the fluff sealing pad 4 can isolate the circulation of gas, improve the sealing performance by more than five times, reduce friction, increase durability, make the sealing effect of the limiting sealing ring 3 better, and the fluff density on the fluff sealing pad 4 is 2900/, the high density of the fluff makes the sealing effect of the fluff sealing gasket 4 more prominent.
Referring to fig. 4, a cavity is formed in the limiting sealing ring 3, a four-way compensation mechanism is arranged in the cavity, the four-way compensation mechanism includes an elastic elliptical ball bag 5 and a plurality of elastic half sealing tubes 6 which are symmetrically distributed in a cross shape, the plurality of elastic half sealing tubes 6 are all fixedly connected with the elastic elliptical ball bag 5, one end of each elastic half sealing tube 6, which is far away from the elastic elliptical ball bag 5, is in extrusion contact with the inner wall of the cavity, one end of each elastic half sealing tube 6, which is close to the inner wall of the limiting sealing ring 3, is fixedly connected with a rigid fluff layer, the elastic half sealing tubes 6 are in contact connection with the inner wall of the limiting sealing ring 3 through the rigid fluff layer, van der waals force is generated between the elastic half sealing tubes 6 and the inner wall of the limiting sealing ring 3 through the rigid fluff layer, and therefore the four-.
Referring to fig. 5, a soft and hard modification mechanism is arranged in the elastic half sealing pipe 6, the soft and hard modification mechanism comprises an elastic long bag 7 and a modification reinforcing sleeve 8, the modification reinforcing sleeve 8 is wrapped outside the elastic long bag 7, one end of the elastic long bag 7 close to the elastic half sealing pipe 6 is communicated with the elastic half sealing pipe 6, one end of the elastic long bag 7 far away from the elastic half sealing pipe 6 is sealed, the modification reinforcing sleeve 8 is made of D3O material, so that the modification reinforcing sleeve 8 can be rapidly hardened by soft after being stressed, the overall strength of the soft and hard modification mechanism is increased, the internal stress of the limiting sealing ring 3 is increased, the limiting sealing ring 3 can be conveniently extended outwards, the sealing performance is increased, when natural gas in the pipeline body 1 is stably circulated, the extrusion force from the outside of the limiting sealing ring 3 on the modification reinforcing sleeve 8 is smaller, the hardness of the modification reinforcing sleeve 8 is lower when the stress is smaller, the internal pressure of the limiting sealing ring 3 is small, so that the limiting sealing ring 3 can have a buffering period when natural gas stably circulates, and is not required to be always in a highly-extruded state, the time of cracking of the limiting sealing ring due to extrusion is greatly prolonged, the maintenance frequency and cost of a natural gas pipeline in the later period are reduced, the extrusion force of the four-way compensation mechanism on the limiting sealing ring 3 is larger, the sealing performance of the limiting sealing ring 3 is improved, the surfaces of the elastic elliptical balloon 5 and the elastic long balloon 7 are coated with LINE-X coating, the elastic elliptical balloon 5 and the elastic long balloon 7 can have excellent tensile strength (up to 6600 pounds), the elastic elliptical balloon 5 and the elastic long balloon 7 cannot be easily damaged in the use process, the service lives of the four-way compensation mechanism and the soft-hard modification mechanism are prolonged, and the use and use of the limiting sealing ring 3 are further prolonged, thereby reduce maintenance frequency and the cost that reduces later stage natural gas line, the long bag 7 intussuseption of elasticity oval sacculus 5 and elasticity is filled with nitrogen gas or deionized water, when receiving the pressure that comes from spacing sealing ring 3 outside, nitrogen gas or deionized water in the long bag 7 of elasticity oval sacculus 5 and elasticity are by the intangible originally, the atress is compressed to the long bag 7 of elasticity in, the shape that can prop up the long bag 7 of elasticity improves the intensity of the long bag 7 of elasticity, can exert the atress on the degeneration reinforcing sleeve 8 through the long bag 7 of elasticity that is propped up simultaneously, the stiffening of time degeneration reinforcing sleeve 8 atress.
A natural gas transportation pipeline interface anti-leakage device comprises the following use methods:
step one, when the gas in the pipeline body 1 is disturbed, the pressure applied to the sealing connecting ring 2 is increased;
secondly, the position, close to the interior of the pipeline body 1, of the limiting sealing ring 3 is stressed and can be extruded towards the direction of the inner wall of the pipeline body 1;
step three, the four-way compensation mechanism is subjected to extrusion force in the vertical direction, and the elastic elliptical balloon 5 is extruded in the vertical direction and transversely extruded and extended towards the left side and the right side;
step four, the filling objects in the elastic elliptical balloon 5 and the elastic long balloon 7 are also stressed, and the deformation reinforcing sleeve 8 in the soft and hard deformation mechanism is stressed and becomes hard from soft, so that the pressure is absorbed to protect the four-way compensation mechanism, the strength of the soft and hard deformation mechanism is increased, and the extrusion force applied to the inside of the limiting sealing ring 3 is increased;
fifthly, under the combined action of the internal extrusion pressure and the external extrusion pressure, the limiting sealing ring 3 is transversely extended to generate an outward extrusion force;
step six, the fluff sealing gasket 4 on the limiting sealing ring 3 can be contacted with the pipeline body 1 more tightly under the extrusion action of the limiting sealing ring 3, so that the sealing performance between the pipeline body 1 and the limiting sealing ring 3 is stronger, the limiting sealing ring 3 can extend outwards when being pressurized through the application of the four-way compensation mechanism, and the phenomenon of pressing more and more tightly is generated, so that the sealing performance of the pipeline interface is greatly improved, the possibility of natural gas leakage is greatly reduced, meanwhile, when the natural gas flows stably in the pipeline, the extrusion force applied to the outside of the limiting sealing ring 3 is smaller, at the moment, under the action of the soft and hard modification mechanism, the outward extrusion force of the four-way compensation mechanism can be changed, so that the extrusion force inside the limiting sealing ring 3 is also smaller, the limiting sealing ring 3 cannot be always in a highly extruded state, and the time of extrusion cracking of the limiting sealing ring 3 is greatly prolonged, thereby reducing the maintenance frequency and cost of the natural gas pipeline in the later period.
The above; but are merely preferred embodiments of the invention; the scope of the invention is not limited thereto; any person skilled in the art is within the technical scope of the present disclosure; the technical scheme and the improved concept of the invention are equally replaced or changed; are intended to be covered by the scope of the present invention.
Claims (7)
1. The utility model provides a natural gas transport pipe says and knecks and prevents leaking device, includes sealed go-between (2), its characterized in that: the pipeline sealing device is characterized in that the left end and the right end of the sealing connecting ring (2) are connected with the pipeline bodies (1) in a threaded manner, the middle end of the inside of the sealing connecting ring (2) is fixedly connected with a limit sealing ring (3), the limit sealing ring (3) is positioned between the two pipeline bodies (1), a fluff sealing layer is arranged between the pipeline bodies (1) and the limit sealing ring (3), a cavity is formed in the limit sealing ring (3), a four-way compensation mechanism is arranged in the cavity and comprises an elastic elliptical ball bag (5) and a plurality of elastic half sealing pipes (6) which are symmetrically distributed in a cross manner, the elastic half sealing pipes (6) are fixedly connected with the elastic elliptical ball bag (5), one ends of the elastic half sealing pipes (6) far away from the elastic elliptical ball bag (5) are in extrusion contact with the inner wall of the cavity, and a softness and hardness modification mechanism is arranged in the elastic half, soft or hard degeneration mechanism includes the long bag of elasticity (7) and degeneration reinforcing sleeve (8), and degeneration reinforcing sleeve (8) parcel is in the long bag of elasticity (7) outside, the long bag of elasticity (7) are close to the one end of the half sealing tube of elasticity (6) and are communicated with each other with the half sealing tube of elasticity (6), the long bag of elasticity (7) is kept away from the one end of the half sealing tube of elasticity (6) and is sealed, the degeneration reinforcing sleeve (8) adopt D3O material to make, the intussuseption of the long bag of elasticity (5) and elasticity (7) is filled with nitrogen gas or deionized water.
2. A leakage prevention apparatus at a natural gas transportation pipeline interface, according to claim 1, wherein: the fine hair sealing layer includes fine hair sealing pad (4), fine hair sealing pad (4) and spacing sealing ring (3) fixed connection, and fine hair sealing pad (4) and pipeline body (1) extrusion contact each other.
3. A leakage prevention apparatus at a natural gas transportation pipeline interface, according to claim 1, wherein: one end of the elastic semi-sealing pipe (6) close to the inner wall of the limiting sealing ring (3) is fixedly connected with a rigid fluff layer, and the elastic semi-sealing pipe (6) is in contact connection with the inner wall of the limiting sealing ring (3) through the rigid fluff layer.
4. A leakage prevention device at a natural gas transportation pipeline interface according to claim 2, wherein: the fluff sealing gasket (4) is made of silicification piece-adding type fluff strips, and the fluff material on the fluff sealing gasket (4) is a plastic film.
5. A leakage prevention device at a natural gas transportation pipeline interface according to claim 2, wherein: the density of the fluff on the fluff sealing gasket (4) is 2800 and 3000 per square meter.
6. A leakage prevention apparatus at a natural gas transportation pipeline interface, according to claim 1, wherein: the surfaces of the elastic elliptical saccule (5) and the elastic long saccule (7) are coated with LINE-X coating.
7. A leakage prevention apparatus at a natural gas transportation pipeline interface, according to claim 1, wherein: the using method comprises the following steps:
step one, when gas in the pipeline body (1) is disturbed, the pressure applied to the sealing connecting ring (2) is increased;
secondly, the position, close to the interior of the pipeline body (1), of the limiting sealing ring (3) is stressed and extruded towards the direction of the inner wall of the pipeline body (1);
step three, the four-way compensation mechanism is subjected to extrusion force in the vertical direction, and the elastic elliptical balloon (5) is extruded in the vertical direction and transversely extruded and extended towards the left side and the right side;
step four, the filling objects in the elastic elliptical balloon (5) and the elastic long balloon (7) are also stressed, and the deformation reinforcing sleeve (8) in the soft and hard deformation mechanism is stressed and becomes hard from soft, so that the pressure is absorbed, the four-way compensation mechanism is protected, the strength of the soft and hard deformation mechanism is increased, and the extrusion force applied to the interior of the limiting sealing ring (3) is increased;
fifthly, under the combined action of the internal extrusion pressure and the external extrusion pressure, the limiting sealing ring (3) is transversely extended to generate an outward extrusion force;
step six, the fluff sealing gasket (4) on the limiting sealing ring (3) can be contacted with the pipeline body (1) more tightly under the extrusion action of the limiting sealing ring (3), so that the tightness between the pipeline body (1) and the limiting sealing ring (3) is stronger.
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| CN112113147B (en) * | 2020-09-07 | 2022-07-01 | 巴东县通龙燃气有限公司 | Gas leakage detection ring capable of automatically changing light from convex at joint of natural gas pipeline |
| CN112577849B (en) * | 2020-12-14 | 2023-03-17 | 西安近代化学研究所 | Explosive isothermal thermal decomposition pressure measuring device |
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| US744505A (en) * | 1902-10-27 | 1903-11-17 | Safety Car Heating & Lighting | Coupling. |
| FR2186352A1 (en) * | 1972-04-19 | 1974-01-11 | Sogeme | Reinforced gasket material - for fluorinated resin enclosing metal grids with interstitial metal balls |
| DE3500924A1 (en) * | 1985-01-12 | 1986-07-17 | Henkel KGaA, 4000 Düsseldorf | PLASTIC SEAL AND METHOD FOR PRODUCING THE SEAL |
| WO1996009483A1 (en) * | 1994-09-21 | 1996-03-28 | Raychem Limited | Sealing member |
| CN2402874Y (en) * | 1999-11-23 | 2000-10-25 | 万向钱潮股份有限公司 | Combined sealing ring |
| CN101290067B (en) * | 2008-05-28 | 2012-02-01 | 东莞市家家电器厂有限公司 | Drive axle water-proof structure |
| CN202927039U (en) * | 2012-11-09 | 2013-05-08 | 际华三五一七橡胶制品有限公司 | T-shaped rubber sealing ring |
| CN203730759U (en) * | 2014-01-07 | 2014-07-23 | 梁新春 | Multi-layer spherical two-sided sealing rings |
| CN105422851B (en) * | 2015-10-30 | 2017-09-15 | 宁波凌珂新材料科技有限公司 | Bunghole structure for neodymium iron boron storage vat |
| CN107143708A (en) * | 2017-06-01 | 2017-09-08 | 宁波天生密封件有限公司 | Sealing and connecting device |
| CN107606152A (en) * | 2017-08-29 | 2018-01-19 | 浙江工业大学 | A kind of spring enhancing collocation structure of pressure container flange sealing |
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2018
- 2018-12-05 CN CN201811478304.3A patent/CN109707927B/en active Active
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| CN109707927A (en) | 2019-05-03 |
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