CN112901909B - Buried pipeline fixing device and fixing method thereof - Google Patents
Buried pipeline fixing device and fixing method thereof Download PDFInfo
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- CN112901909B CN112901909B CN202110084333.7A CN202110084333A CN112901909B CN 112901909 B CN112901909 B CN 112901909B CN 202110084333 A CN202110084333 A CN 202110084333A CN 112901909 B CN112901909 B CN 112901909B
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- supporting leg
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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
- F16L59/00—Thermal insulation in general
- F16L59/12—Arrangements for supporting insulation from the wall or body insulated, e.g. by means of spacers between pipe and heat-insulating material; Arrangements specially adapted for supporting insulated bodies
- F16L59/135—Hangers or supports specially adapted for insulated pipes
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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
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/026—Laying or reclaiming pipes on land, e.g. above the ground in or on a frozen surface
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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
- F16L59/00—Thermal insulation in general
- F16L59/06—Arrangements using an air layer or vacuum
- F16L59/065—Arrangements using an air layer or vacuum using vacuum
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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
- F16L59/00—Thermal insulation in general
- F16L59/06—Arrangements using an air layer or vacuum
- F16L59/07—Arrangements using an air layer or vacuum the air layer being enclosed by one or more layers of insulation
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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
- F16L59/00—Thermal insulation in general
- F16L59/12—Arrangements for supporting insulation from the wall or body insulated, e.g. by means of spacers between pipe and heat-insulating material; Arrangements specially adapted for supporting insulated bodies
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a buried pipeline fixing device and a fixing method thereof.A pipeline is fixed on a heat insulation mounting plate through a heat insulation fixing component, and the heat insulation mounting plate is fixed above a perennial frozen soil layer through anti-freeze-drawing supporting legs; the heat insulation fixing assembly comprises an upper positioning installation part and a lower positioning installation part, and the two positioning installation parts are butted to form a circular channel for a crude oil pipeline to pass through; the anti-freezing support leg is assembled at the bottom of the heat insulation mounting plate through a support leg mounting opening; the anti-freezing pulling supporting leg comprises a supporting leg body and an expansion inner core. The fixed factor of safety of underground is high, and prevents frostbite and pull out the supporting leg and have good prevent frostbite and pull out the effect, and fixed stability is high.
Description
Technical Field
The invention relates to the technical field of frozen soil, in particular to a buried pipeline fixing device and a fixing method thereof.
Background
The permafrost refers to soil or rock which has a temperature of 0 ℃ or below 0 ℃, contains ice and has a freezing time lasting for more than two years. The foundation stability of the engineering structure of the permafrost region is closely related to the thermal state of the permafrost at the lower part. However, due to the particularity of engineering properties (frozen soil engineering with an internal heat source), the permafrost on the lower part of the buried pipeline engineering is influenced by the oil/air temperature of the pipeline and the external environment, and pipeline engineering constructed in a permafrost region can face various frozen soil disasters. When a high-temperature crude oil pipeline is buried in a permafrost region, frozen soil on the lower portion of the pipeline melts, uneven thawing can cause displacement of the pipe body, and the risk of breakage and instability of the pipe body can occur in severe cases. When the laying object is a natural gas pipeline, the pipeline is operated at negative temperature, and in-situ and segregation frost heaving can be caused. The pipe body is warped and deformed, the safe and stable operation of the pipeline can be threatened, and the construction of pipeline engineering in permafrost areas is always a problem which puzzles the academic world for many years.
The conventional buried laying pipeline generally adopts measures such as adding an insulating layer to cool the pipe foundation soil, but the overall trend of frozen soil degradation cannot be changed by adding the insulating layer. And the conventional hot oil pipeline erection type measures, such as the U.S. Trans-Alaska pipeline engineering, adopt steel structure erection supports, and because the pipeline is overhead above the ground surface, natural disaster risks such as fire disasters and the like can be met in the pipeline operation process. Meanwhile, the lower supporting structure can generate a frozen-out lifting phenomenon due to the fact that the outer wall surface is smooth, and therefore the instability risk of the upper supporting pipe body is caused. Therefore, it is urgently needed to develop a set of measures which are simple in construction and multifunctional, can solve the frost heaving problem of the buried natural gas pipeline in the frozen soil area and can solve the thawing and sinking problem of the buried hot oil pipeline in the frozen soil area.
Disclosure of Invention
The invention aims to provide an underground pipeline fixing device aiming at the problems that in the prior art, a pipeline with an internal heat source (such as a crude oil pipeline) is thawed and sunk due to heat exchange with frozen soil, and a pipeline with low-temperature materials inside (such as a natural gas pipeline) is frozen and swelled due to heat exchange with the frozen soil.
Another object of the present invention is to provide a fixing method of the pipe fixing device.
The technical scheme adopted for realizing the purpose of the invention is as follows:
a buried pipeline fixing device is characterized in that a pipeline is fixed on a heat insulation mounting plate through a heat insulation fixing assembly, and the heat insulation mounting plate is fixed above a perennial frozen soil layer through anti-freeze-drawing supporting legs;
the heat insulation fixing assembly comprises an upper positioning installation part and a lower positioning installation part, and the two positioning installation parts are butted to form a circular channel for a crude oil pipeline to pass through;
the anti-freezing support leg is assembled at the bottom of the heat insulation mounting plate through a support leg mounting opening; the anti-freezing pulling support leg comprises a support leg body and an expansion inner core, wherein a hollow channel is formed in the support leg body, at least one side wall through hole is formed in the side wall of the support leg body, and a freezing pulling nail is assembled in each side wall through hole; the expansion inner core comprises a fixed transparent cover which is detachably assembled at the top of the supporting leg body, an embedded insulating thread sleeve which is fixed in a central opening of the fixed transparent cover, a frozen-drawn nail push sleeve which is fixed at the bottom of the insulating thread sleeve and is positioned in a hollow channel, and a frozen-drawn nail push rod which is matched with the frozen-drawn nail push sleeve; the freeze-drawn nail push rod comprises a push rod part and a conical part, wherein the push rod part is partially sleeved in the freeze-drawn nail push sleeve, the conical part is fixed at the bottom end of the push rod part, the outer diameter of the push rod part is smaller than the inner diameter of the freeze-drawn nail push sleeve, the diameter of the large end of the conical part is larger than the inner diameter of the freeze-drawn nail push sleeve, and the top of the push rod part penetrates out of the central opening; when the frozen extracted nail push rod moves upwards, the conical part pushes the frozen extracted nail push sleeve to expand, and the frozen extracted nail push sleeve pushes the tail end of the frozen extracted nail to enable the head end of the frozen extracted nail to penetrate through the side wall through hole;
the top of pulling out the nail push rod is frozen and is equipped with first power terminal, it is fixed to cover thoroughly and be equipped with second power terminal, first power terminal, freeze and pull out the nail push rod, freeze and pull out the nail and push away the cover, freeze the lateral wall of pulling out nail, supporting leg body, fix and cover thoroughly, second power terminal constitution electric loop, it is the electricity material that generates heat to freeze to pull out the nail.
In the technical scheme, the heat insulation mounting plate comprises two layers of mounting plates and a heat insulation plate clamped between the two layers of mounting plates.
In the above technical scheme, the mounting plate is a metal plate, and the heat insulation plate is a hard polyethylene fiber plate.
In the technical scheme, each positioning and installing part comprises an outer shell plate, a sealing cavity is formed inside the outer shell plate, the sealing cavity is formed by two or more than two air bins at intervals through a supporting partition plate, any two adjacent air bins are communicated through a one-way valve, an air injection port and an air output port are arranged on the outer shell plate, the air injection port is communicated with one of the air bins, and the air output port is communicated with one of the air bins.
In the technical scheme, the connecting plate is fixed at the butt joint position of the two positioning installation parts, and the two positioning installation parts are fixedly connected through the connecting plate after being butted.
In the technical scheme, the top of the heat insulation mounting plate is fixed with a mounting seat, a mounting screw hole is formed in the mounting seat, a matching screw is fixed on the heat insulation mounting plate, and the heat insulation fixing component is fixedly clamped in the mounting seat.
In the above technical scheme, the supporting partition plate is arranged in a groined shape, and the gas cabin is a square cavity.
In the technical scheme, the push rod part is in threaded connection with the insulating thread sleeve, and the top of the push rod part is provided with a hexagonal opening.
In the technical scheme, the bottom of the supporting leg body is in a pointed cone shape, and the threaded plate is fixed outside the side wall of the supporting leg body.
In the technical scheme, the top of the supporting leg body is in threaded connection with the fixed transparent cover.
In the above technical solution, the anti-freeze drawing support leg further includes a support rod that can be inserted into the hollow passage in a matching manner.
In the technical scheme, the through hole of the side wall is internally fixed with a frozen pull nail bushing vertical to the supporting leg body, and the frozen pull nail is embedded in the frozen pull nail bushing.
In the technical scheme, the tail end of the frozen pull nail is fixed with the anti-drop pin, so that the frozen pull nail is prevented from dropping out from the frozen pull nail bushing.
In the technical scheme, the nail pushing sleeve is formed by enclosing a plurality of groups of arc-shaped plates, the top of each arc-shaped plate is fixed on the bottom of the insulating wire sleeve, expansion slots are formed between the arc-shaped plates, a nail fixing groove is formed in the arc-shaped plates corresponding to the nail to be frozen and pulled, the tail end of the nail to be frozen and pulled is located in the nail fixing groove to be frozen and pulled, when the nail pushing rod of the nail to be frozen and pulled moves upwards, the arc-shaped plates are bent, the nail pushing sleeve to be frozen and pulled expands, and in the expanding process, the nail fixing groove to be frozen and pulled pushes the nail to be frozen and move out of the nail lining to be frozen and pulled.
In the technical scheme, the supporting leg installing port and the supporting leg body are connected through threads, after the supporting leg body is arranged in the permafrost layer, the supporting leg installing port is assembled at the top of the supporting leg body, and then the supporting leg installing port is welded at the bottom end of the heat insulation installing plate.
In the technical scheme, the buried pipeline fixing device comprises two or more anti-freezing and pulling supporting legs, the anti-freezing and pulling supporting legs are symmetrically assembled at the bottom of the heat insulation mounting plate, and the two or more anti-freezing and pulling supporting legs consist of supporting leg bodies with corresponding numbers and an expansion inner core.
In another aspect of the present invention, the method for fixing the buried pipeline fixing device includes the following steps:
the crude oil pipeline fixing and mounting device is buried under the ground, earth is dug to expose a permafrost layer, when the crude oil pipeline fixing and mounting device is used, firstly, an anti-freezing support leg is mounted in the permafrost layer, then, a heat insulation mounting plate is mounted at the top of the anti-freezing support leg, and the heat insulation mounting plate and the parts above the heat insulation mounting plate are buried in a movable layer;
the anti-freezing support leg is fixed by the following method, the anti-freezing support leg is installed in a frozen soil area, a power supply is connected to a power supply terminal, meanwhile, a force is applied to a freezing nail push rod, the freezing nail push sleeve is driven to start expanding and expanding after the upward movement of the freezing nail push rod, the freezing nail push sleeve is driven to start expanding and expanding, the freezing nail starts moving outwards, meanwhile, a first power supply terminal and a second power supply terminal are respectively connected with a positive pole and a negative pole of the power supply, when the freezing nail push rod moves upwards, the large end of a conical part contacts with the freezing nail push sleeve, the freezing nail push sleeve contacts with the freezing nail, the freezing nail contacts with the side wall of a support leg body, the side wall of the support leg body contacts with a fixing transparent cover, an electric circuit is formed, the freezing nail generates heat, the frozen soil outside the support leg body is melted during the outward movement process, the freezing nail is smoothly penetrated out, after all the freezing nails penetrate out, the power supply is cut off, an expansion inner core is taken down, and the support leg body and the freezing nail are left in a frozen soil layer, after the frozen soil is re-frozen, the supporting leg body and the frozen soil are well fixed, and then the heat insulation mounting plate and the heat insulation fixing component fixed with the heat insulation mounting plate are assembled at the top of the supporting leg body through the supporting leg mounting opening;
in the technical scheme, before embedding, inert gas with the heat conductivity coefficient lower than that of air is injected through a gas injection port, the gas bins are inflated one by one through a one-way valve, when a single gas bin is damaged due to external force, the use of the whole device cannot be influenced, the inflated inert gas bin has a good heat insulation function, heat exchange between a crude oil pipeline and frozen soil is prevented, in the inert gas injection process, the air originally positioned in the gas bin is output from a gas output port until all the gas bins are filled with the inert gas, and the gas injection port and the gas output port are closed; or the gas injection port is closed, the gas output port is vacuumized from the gas output port, and the gas output port is closed when the gas bin is in a vacuumizing state, so that the vacuum structure also has good heat insulation performance, heat exchange between the crude oil pipeline and frozen soil is prevented, and when a single gas bin is in a vacuum breaking state due to external force damage, the vacuum loading state of other gas bins is not influenced due to the arrangement of the one-way valve.
In above-mentioned technical scheme, with the assembly of inflation inner core on a supporting leg body, freeze and pull out the installation back that the nail bloated out and accomplish a supporting leg body, dismantle the inflation inner core and get off the repacking on another supporting leg body, install a plurality of supporting leg bodies in proper order.
Compared with the prior art, the invention has the beneficial effects that:
1. as long-distance linear engineering, pipelines in permafrost regions inevitably cross sections with different ground surface conditions such as forest regions and grasslands, and the erected measures cause potential risks when forest fires occur due to the fact that the pipelines are arranged outside. The supporting measures can effectively avoid natural disaster risks such as fire disasters and the like because the pipeline is laid underground.
2. The device is widely applied, not only can be applied to the frost heaving disaster prevention and control of the natural gas pipeline in the permafrost region, but also can effectively solve the thaw disaster caused by the hot oil pipeline in the permafrost region.
3. This device lower part bearing structure adopts prevents frostbite and pulls out bearing structure, can effectively avoid the pipe body unstability calamity that pipeline operation in-process lower part bearing structure freezes and pulls out and bring.
Drawings
FIG. 1 is a cross-sectional view of a crude oil pipeline fixing device.
FIG. 2 is a diagram of the relationship between the gas bins.
Fig. 3 is a perspective view showing the positioning and mounting portion (a part of the check valve is omitted and only one check valve is indicated).
FIG. 4 is a top view of the crude pipeline securing apparatus.
FIG. 5 is a cross-sectional view of the freeze-pull resistant support leg.
FIG. 6 is a side view of the support leg body.
Fig. 7 is a cross-sectional view taken along the plane a-a in fig. 5.
FIG. 8 is a side view of the cryo-plucked pin collar.
In the figure: 1-power supply terminal, 2-hexagonal opening, 3-fixed transparent cover, 4-frozen pull nail, 5-support leg body, 6-frozen pull nail pushing sleeve, 7-pull nail pushing rod, 8-insulating screw sleeve, 9-frozen pull nail bushing, 10-anti-drop pin, 11-expansion slotting, 12-frozen pull nail fixing groove, 13-thread plate, 14-crude oil pipeline, 15-support clapboard, 16-one-way valve, 17-gas bin, 18-gas injection opening, 19-mounting plate, 20-frozen pull support leg, 21-thermal insulation plate, 22-support leg mounting opening, 23-mounting seat, 24-mounting screw hole, 25-shell plate and 26-connecting plate.
6-1-arc plate, 7-1-push rod part and 7-2 conical part.
a-an active layer and b-a frozen soil layer.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
A buried pipeline fixing device comprises a heat insulation mounting plate, an anti-freeze drawing supporting leg 20 assembled at the bottom of the heat insulation mounting plate and a heat insulation fixing component fixed at the top of the heat insulation mounting plate;
the anti-freezing support leg 20 is used for being installed in a permafrost layer, the heat insulation fixing component is installed in a movable soil layer and comprises an upper positioning installation part and a lower positioning installation part, and the two positioning installation parts are in butt joint to form a circular channel for a crude oil pipeline 14 to pass through;
the anti-freezing pulling support leg 20 is assembled at the bottom of the heat insulation mounting plate through a support leg mounting opening 22;
the anti-freezing pulling supporting leg comprises a supporting leg body 5 and an expansion inner core, wherein a hollow channel is formed in the supporting leg body 5, at least one side wall through hole is formed in the side wall of the supporting leg body 5, and a freezing pulling nail 4 is assembled in each side wall through hole; the expansion inner core comprises a fixed transparent cover 3 which is detachably assembled at the top of the supporting leg body 5, an embedded insulating thread sleeve 8 which is fixed in a central opening of the fixed transparent cover 3, a frozen-drawn nail pushing sleeve 6 which is fixed at the bottom of the insulating thread sleeve 8 and is positioned in a hollow channel, and a frozen-drawn nail pushing rod 7 which is matched with the frozen-drawn nail pushing sleeve 6; the frozen pull nail push rod 7 comprises a push rod part 7-1 partially sleeved in the frozen pull nail push sleeve 6 and a conical part 7-2 fixed at the bottom end of the push rod part 7-1, the outer diameter of the push rod part 7-1 is smaller than the inner diameter of the frozen pull nail push sleeve 6, the diameter of the large end of the conical part 7-2 is larger than the inner diameter of the frozen pull nail push sleeve 6, and the top of the push rod part 7-1 penetrates out of the central opening; when the frozen extracted nail push rod 7 moves upwards, the conical part 7-2 pushes the frozen extracted nail push sleeve 6 to expand, and the frozen extracted nail push sleeve 6 pushes the tail end of the frozen extracted nail 4 to enable the head end of the frozen extracted nail to penetrate through the side wall through hole;
the top of pulling out nail push rod 7 is frozen and is equipped with first power terminal 1, it is fixed to be equipped with second power terminal on covering 3 thoroughly, first power terminal 1, freeze and pull out nail push rod 7, freeze and pull out nail push sleeve 6, freeze and pull out nail 4, supporting leg body 5's lateral wall, fixed cover 3, second power terminal constitution electric loop thoroughly, the resistance that freezes to pull out nail 4 material is greater than to freeze and pulls out nail push rod 7, freeze and pull out nail push sleeve 6, supporting leg body 5 and fixed resistance of covering 3 thoroughly, freezes to pull out nail 4 and can adopt big resistance materials such as chromium-aluminium alloy for when first power terminal 1, second power terminal connect the electricity, it generates heat to freeze and pull out nail 4. In order to improve the safety performance, the outer wall of the fixed transparent cover 3 is coated with an insulating layer.
The buried pipeline fixing devices are arranged at intervals along the length direction of the pipeline, and the pipeline is fixed at multiple points.
The crude oil pipeline fixing and mounting device is buried under the ground, earth is dug to be exposed to a permafrost layer, when the crude oil pipeline fixing and mounting device is used, firstly, the anti-freezing support leg 20 is mounted in the permafrost layer, then, the heat insulation mounting plate is mounted at the top of the anti-freezing support leg 20, and the heat insulation mounting plate and the parts above the heat insulation mounting plate are buried in the movable layer.
When the pipeline with the internal heat source is fixed by the system, the thawing and sinking of the soil body can be effectively prevented, and when the pipeline with the internal low-temperature material is fixed by the system, the frost heaving of the soil body can be effectively prevented.
The anti-freezing pulling method for the anti-freezing pulling supporting leg comprises the following steps: the anti-freezing support leg is installed in a frozen soil area, a power supply is connected to a power supply terminal 1, meanwhile, a force is applied to a freezing nail push rod 7, the freezing nail push sleeve 6 is driven to expand and expand, the freezing nail 4 starts to move outwards, meanwhile, a first power supply terminal 1 and a second power supply terminal are respectively connected with the positive pole and the negative pole of the power supply, when the freezing nail push rod 7 moves upwards, the large end of a conical part 7-2 contacts the freezing nail push sleeve 6, the freezing nail push sleeve 6 contacts the freezing nail 4, the freezing nail 4 contacts the side wall of a support leg body 5, and the side wall of the support leg body 5 contacts a fixed transparent cover 3 to form an electric loop, because the freezing nail 4 has higher resistance, the freezing nail 4 generates heat, the freezing soil outside the support leg body 5 is melted during the outward movement process, the freezing nail 4 smoothly penetrates out, and after all the freezing nails 4 penetrate out, the power is cut off, take off the inflation inner core (fixed cover 3, inlay insulating silk cover 8, freeze and pull out nail push sleeve 6, freeze and pull out nail push rod 7), supporting leg body 5 with freeze and pull out nail 4 and stay in the permafrost soil in situ, treat that frozen soil freezes again for form well fixedly between supporting leg body 5 and the frozen soil, then assemble in the top of supporting leg body 5 through supporting leg installing port 22 with thermal-insulated mounting panel and rather than fixed thermal-insulated fixed subassembly.
Preferably, the anti-freezing nail pulling support leg further comprises a support rod capable of being inserted into the hollow channel in a matched mode, the nail freezing and pulling push rod 7 is pulled down, the support rod is inserted into the hollow channel, and dislocation in the use process of the freezing and pulling nail is prevented.
Preferably, the freeze-drawn nails 4 are arranged in a row on the side wall of the support leg body 5.
Preferably, the supporting leg installing port 22 is in threaded connection with the supporting leg body 5, and after the supporting leg body 5 is installed in the permafrost layer, the supporting leg installing port 22 is assembled at the top of the supporting leg body 5, and then the supporting leg installing port 22 is welded at the bottom end of the heat insulation installing plate. Make from this and form the screw assembly between supporting leg body 5 and the thermal-insulated mounting panel, assembly stability is high, avoids the body unstability.
Preferably, the buried pipeline fixing device comprises two or more than two anti-freezing-pulling supporting legs 20, the anti-freezing-pulling supporting legs 20 are symmetrically assembled at the bottom of the heat insulation mounting plate, and the two or more than two anti-freezing-pulling supporting legs 20 consist of supporting leg bodies 5 with corresponding numbers and an expansion inner core. During the use at every turn, with the assembly of inflation inner core on a supporting leg body 5, freeze and pull out the installation back that nail 4 bloated and accomplish a supporting leg body 5, dismantle the inflation inner core and reassemble on another supporting leg body 5, install a plurality of supporting leg bodies 5 in proper order. So reduced the use cost who prevents frostbite and pull out the supporting leg.
Preferably, each positioning and mounting part comprises an outer shell plate 25, a sealed chamber is formed in the outer shell plate 25, the sealed chamber is formed by a supporting partition plate 15 at intervals, two or more air chambers 17 are formed in the sealed chamber, any two adjacent air chambers 17 are communicated through a one-way valve 16, a gas injection port 18 and a gas output port are arranged on the outer shell plate 25, the gas injection port 18 is communicated with one air chamber 17, and the gas output port is communicated with one air chamber 17.
The inert gas with the heat conductivity coefficient lower than that of air is injected through the gas injection port 18, the gas bins 17 are inflated one by one through the one-way valve 16, when a single gas bin 17 is damaged due to external force, the use of the whole device cannot be influenced, and the inflated inert gas bin 17 has a good heat insulation function and prevents heat exchange between the crude oil pipeline 14 and frozen soil. In the process of injecting the inert gas, the air originally located in the gas cabin 17 is output from the gas output port until all the gas cabins 17 are filled with the inert gas, and the gas injection port 18 and the gas output port are closed.
Or the gas injection port 18 is closed, the gas output port is vacuumized from the gas output port, and the gas output port is closed when the gas bin 17 is in a vacuumized state, so that the vacuum structure also has good heat insulation performance, and heat exchange between the crude oil pipeline 14 and frozen soil is prevented. When a single air chamber 17 is in a vacuum breaking state due to external force damage, the vacuum loading state of other air chambers 17 is not influenced.
Example 2
Preferably, the insulated mounting plate comprises two layers of mounting plates 19 and an insulated plate 21 sandwiched between the two layers of mounting plates 19. The heat insulation mounting plate can prevent heat of the crude oil pipeline from being transferred into the frozen soil, so that the frozen soil contacted with the crude oil pipeline is degraded.
Preferably, the mounting plate 19 is a metal plate, and the heat insulation plate 21 is a hard polyethylene fiber plate. The strength and the heat insulation performance of the heat insulation mounting plate are ensured.
Preferably, the connecting plate 26 is fixed at the butt joint position of the two positioning installation parts, the two positioning installation parts are fixedly connected through the connecting plate after being butted, and the two connecting plates 26 can be fixed through matching of bolts and screws, so that the outer shell plate 25 can be tightly attached to the crude oil pipeline 14 after the two connecting plates 26 are fastened together.
Preferably, a mounting seat 23 is fixed to the top of the heat insulation mounting plate, a mounting screw hole 24 is formed in the mounting seat 23, a matching screw is fixed to the heat insulation mounting plate, and the heat insulation fixing component is clamped and fixedly mounted in the mounting seat 23, so that the heat insulation mounting plate is convenient to detach and maintain.
Preferably, the supporting partition 15 is arranged in a shape like a Chinese character jing, and the gas bin 17 is a square chamber, so that the processing is convenient.
Example 3
Preferably, the push rod part 7-1 is in threaded connection with the insulating thread sleeve 8, the top of the push rod part 7-1 is a hexagonal opening 2, and the push rod part 7-1 moves upwards by rotating the push rod part 7-1 through the hexagonal opening 2. Besides, the push rod part 7-1 and the insulating thread sleeve 8 can be in clearance fit, and when the device is used, the push rod part 7-1 is directly pulled upwards.
Preferably, the bottom of the supporting leg body 5 is in a sharp cone shape, and a thread plate 13 is fixed on the outer portion of the side wall of the supporting leg body 5, so that the supporting leg body 5 can be conveniently and rotatably installed in frozen soil.
Preferably, the top of the supporting leg body 5 is in threaded connection with the fixed transparent cover 3, and when the expansion inner core is disassembled and assembled, only the fixed transparent cover 3 needs to be rotated.
Preferably, be fixed with in the lateral wall through-hole and freeze and pull out nail bush 9 with supporting leg body 5 vertically, it inlays and adorns to freeze and pulls out nail 4 in freeze and pull out nail bush 9, this because freeze and pull out nail push rod 7 and freeze and pull out nail 4 and can produce a yawing force messenger and freeze and pull out nail 4 skew when the effect, freeze and pull out setting up of nail bush 9, reducible yawing force, it is electrically conductive when freezing and pulling out nail 4, freezing and pulling out the contact between the lateral wall of nail bush 9 and supporting leg body 5.
Preferably, a separation-preventing pin 10 is fixed at the tail end of the freeze-drawn nail 4 to prevent the freeze-drawn nail 4 from separating from the freeze-drawn nail bushing 9.
Preferably, the frozen nail pulling sleeve 6 is formed by enclosing a plurality of groups of arc-shaped plates 6-1, the top of each arc-shaped plate 6-1 is fixed at the bottom of the insulating screw sleeve 8, an expansion slot 11 is formed between the arc-shaped plates 6-1, a frozen nail pulling fixing groove 12 is formed on the arc-shaped plate 6-1 corresponding to the frozen nail pulling 4, and the tail end of the frozen nail pulling 4 is positioned in the frozen nail pulling fixing groove 12. When the frozen extracted nail push rod 7 moves upwards, the arc-shaped plate 6-1 bends, the frozen extracted nail push sleeve 6 expands, and in the expanding process, the frozen extracted nail fixing groove 12 pushes the frozen extracted nail 4 to move out of the frozen extracted nail bushing 9.
Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in the embodiments for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Moreover, relational terms such as "first" and "second," and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (15)
1. The buried pipeline fixing device is characterized in that a pipeline is fixed on a heat insulation mounting plate through a heat insulation fixing assembly, and the heat insulation mounting plate is fixed above a perennial frozen soil layer through anti-freeze-drawing supporting legs;
the heat insulation fixing assembly comprises an upper positioning installation part and a lower positioning installation part, and the two positioning installation parts are butted to form a circular channel for a crude oil pipeline to pass through;
the anti-freezing support leg is assembled at the bottom of the heat insulation mounting plate through a support leg mounting opening; the anti-freezing pulling support leg comprises a support leg body and an expansion inner core, wherein a hollow channel is formed in the support leg body, at least one side wall through hole is formed in the side wall of the support leg body, and a freezing pulling nail is assembled in each side wall through hole; the expansion inner core comprises a fixed transparent cover which is detachably assembled at the top of the supporting leg body, an embedded insulating thread sleeve which is fixed in a central opening of the fixed transparent cover, a frozen-drawn nail push sleeve which is fixed at the bottom of the insulating thread sleeve and is positioned in a hollow channel, and a frozen-drawn nail push rod which is matched with the frozen-drawn nail push sleeve; the freeze-drawn nail push rod comprises a push rod part and a conical part, wherein the push rod part is partially sleeved in the freeze-drawn nail push sleeve, the conical part is fixed at the bottom end of the push rod part, the outer diameter of the push rod part is smaller than the inner diameter of the freeze-drawn nail push sleeve, the diameter of the large end of the conical part is larger than the inner diameter of the freeze-drawn nail push sleeve, and the top of the push rod part penetrates out of the central opening; when the frozen extracted nail push rod moves upwards, the conical part pushes the frozen extracted nail push sleeve to expand, and the frozen extracted nail push sleeve pushes the tail end of the frozen extracted nail to enable the head end of the frozen extracted nail to penetrate through the side wall through hole;
the top of pulling out the nail push rod is frozen and is equipped with first power terminal, it is fixed to cover thoroughly and be equipped with second power terminal, first power terminal, freeze and pull out the nail push rod, freeze and pull out the nail and push away the cover, freeze the lateral wall of pulling out nail, supporting leg body, fix and cover thoroughly, second power terminal constitution electric loop, it is the electricity material that generates heat to freeze to pull out the nail.
2. An underground pipeline fixing device as claimed in claim 1 wherein the thermally insulated mounting plate comprises two layers of mounting plates and a thermally insulating plate sandwiched between the two layers of mounting plates.
3. A buried pipeline fixing device as claimed in claim 1, wherein each locating and mounting part comprises an outer casing plate with a sealed chamber formed therein, the sealed chamber is partitioned by a supporting partition plate to form two or more than two gas chambers, any two adjacent gas chambers are communicated with each other through a one-way valve, the outer casing plate is provided with a gas inlet and a gas outlet, the gas inlet is communicated with one of the gas chambers, and the gas outlet is communicated with one of the gas chambers.
4. The buried pipeline fixing device of claim 1, wherein the push rod part is in threaded connection with the insulating thread bushing, and the top of the push rod part is a hexagonal opening.
5. A buried pipeline fixing device as claimed in claim 1, wherein the bottom of the supporting leg body is tapered, and a threaded plate is fixed to the outside of the side wall of the supporting leg body.
6. An underground pipeline fixing device as claimed in claim 1, wherein a freeze-drawn nail bushing perpendicular to the supporting leg body is fixed in the through hole of the side wall, and the freeze-drawn nail is embedded in the freeze-drawn nail bushing.
7. An underground pipeline fixing device as claimed in claim 1, wherein the freeze-drawn nail pushing sleeve is formed by enclosing a plurality of groups of arc plates, the top of each arc plate is fixed to the bottom of the insulating thread sleeve, an expansion slot is formed between the arc plates, a freeze-drawn nail fixing groove is formed in the arc plate corresponding to the freeze-drawn nail, the tail end of the freeze-drawn nail is located in the freeze-drawn nail fixing groove, when the freeze-drawn nail pushing rod moves upwards, the arc plates are bent, the freeze-drawn nail pushing sleeve expands, and in the expanding process, the freeze-drawn nail fixing groove pushes the freeze-drawn nail to move out of the freeze-drawn nail bushing.
8. The buried pipeline fixing device of claim 1, wherein the supporting leg mounting port is in threaded connection with the supporting leg body, after the supporting leg body is installed in a permafrost layer, the supporting leg mounting port is assembled at the top of the supporting leg body, and then the supporting leg mounting port is welded to the bottom end of the heat insulation mounting plate.
9. An underground pipeline fixing device as claimed in claim 1, wherein the underground pipeline fixing device comprises two or more anti-freeze-drawing supporting legs, the anti-freeze-drawing supporting legs are symmetrically assembled at the bottom of the heat insulation mounting plate, and the two or more anti-freeze-drawing supporting legs are composed of a corresponding number of supporting leg bodies and an expansion inner core.
10. A buried pipeline fixing device according to claim 2 wherein the mounting plate is a metal plate and the insulating plate is a hard polyethylene fibre plate.
11. A buried pipeline fixing device as claimed in claim 3, wherein a connecting plate is fixed at the butt joint position of the two positioning installation parts, and the two positioning installation parts are fixedly connected through the connecting plate after butt joint; the top of thermal-insulated mounting panel is fixed with the mount pad, form the installation screw on the mount pad, the cooperation screw is fixed in on the thermal-insulated mounting panel, thermal-insulated fixed subassembly block fixed mounting in the mount pad, the supporting baffle is the groined type setting, the gas storehouse is square cavity.
12. An underground pipeline fixing device as claimed in claim 5 wherein the top of the supporting leg body is threadedly connected to the fixing transparent cover, and the freeze-pull resistant supporting leg further comprises a supporting rod which can be fittingly inserted into the hollow channel.
13. An underground pipeline fixing device as claimed in claim 6, wherein the tail end of the freeze-drawn nail is fixed with a drop-proof pin to prevent the freeze-drawn nail from dropping out of the freeze-drawn nail bushing.
14. A method of securing an underground pipeline securing device according to any one of claims 1 to 13 including the steps of:
the buried pipeline fixing device is buried under the ground, earth is dug to expose a permafrost layer, when the buried pipeline fixing device is used, the anti-freezing support leg is firstly installed in the permafrost layer, then the heat insulation installation plate is installed at the top of the anti-freezing support leg, and the heat insulation installation plate and the parts above the heat insulation installation plate are buried in the movable layer;
the anti-freezing support leg is fixed by the following method, the anti-freezing support leg is installed in a frozen soil area, a power supply is connected to a power supply terminal, meanwhile, a force is applied to a freezing nail push rod, the freezing nail push sleeve is driven to start expanding and expanding after the upward movement of the freezing nail push rod, the freezing nail push sleeve is driven to start expanding and expanding, the freezing nail starts moving outwards, meanwhile, a first power supply terminal and a second power supply terminal are respectively connected with a positive pole and a negative pole of the power supply, when the freezing nail push rod moves upwards, the large end of a conical part contacts with the freezing nail push sleeve, the freezing nail push sleeve contacts with the freezing nail, the freezing nail contacts with the side wall of a support leg body, the side wall of the support leg body contacts with a fixing transparent cover, an electric circuit is formed, the freezing nail generates heat, the frozen soil outside the support leg body is melted during the outward movement process, the freezing nail is smoothly penetrated out, after all the freezing nails penetrate out, the power supply is cut off, an expansion inner core is taken down, and the support leg body and the freezing nail are left in a frozen soil layer, treat frozen soil and unfreeze for form well fixed between supporting leg body and the frozen soil, then assemble the thermal-insulated mounting panel and rather than the thermal-insulated fixed subassembly of fixed in the top of supporting leg body through the supporting leg installing port.
15. The fixing method according to claim 14, wherein before burying, an inert gas having a thermal conductivity lower than that of air is injected through the gas injection port, the air cells are inflated one by one through the check valve, when a single air cell is damaged by an external force, the use of the entire apparatus is not affected, the inflated inert gas cell has a good heat insulating function to prevent heat exchange between the crude oil pipeline and the frozen earth, and during the inert gas injection process, the air originally located in the air cell is output from the gas output port until all the air cells are filled with the inert gas, and the gas injection port and the gas output port are closed; or the gas injection port is closed, the gas output port is vacuumized from the gas output port, and the gas output port is closed when the gas bin is in a vacuumizing state, so that the vacuum structure also has good heat insulation performance, heat exchange between the crude oil pipeline and frozen soil is prevented, and when a single gas bin is in a vacuum breaking state due to external force damage, the vacuum loading state of other gas bins is not influenced due to the arrangement of the one-way valve.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116290122B (en) * | 2022-10-20 | 2023-08-11 | 中国科学院西北生态环境资源研究院 | Use method of anti-freezing and anti-thawing device |
| CN115789348B (en) * | 2023-02-03 | 2023-05-05 | 中国科学院西北生态环境资源研究院 | Supporting structure for pipeline penetrating through permafrost region |
| CN117366481B (en) * | 2023-12-08 | 2024-02-06 | 中国科学院西北生态环境资源研究院 | Device and method for monitoring moving distance of buried heating oil pipeline in permafrost region |
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