CN111288249A - Heat-insulating steel pipe and sealing manufacturing method thereof - Google Patents
Heat-insulating steel pipe and sealing manufacturing method thereof Download PDFInfo
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- CN111288249A CN111288249A CN202010207959.8A CN202010207959A CN111288249A CN 111288249 A CN111288249 A CN 111288249A CN 202010207959 A CN202010207959 A CN 202010207959A CN 111288249 A CN111288249 A CN 111288249A
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- Prior art keywords
- pipe
- stainless steel
- compression ring
- steel pipe
- fixed compression
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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
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/028—Composition or method of fixing a thermally insulating material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
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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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/102—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by material
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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
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/029—Shape or form of insulating materials, with or without coverings integral with the insulating materials layered
-
- 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
- F16L59/04—Arrangements using dry fillers, e.g. using slag wool which is added to the object to be insulated by pouring, spreading, spraying or the like
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Insulation (AREA)
Abstract
The invention discloses a heat preservation steel pipe and a sealing manufacturing method thereof, wherein the heat preservation steel pipe comprises a pipe body section and a sealing section which are axially connected; the sealing sections are positioned at two ends of the pipe body section; the tube body section comprises a conveying steel tube, an aerogel coating layer and a stainless steel outer tube which are sequentially sleeved from inside to outside; at the position of the sealing section, a fixed compression ring is sleeved outside the conveying steel pipe, a stainless steel outer pipe is sleeved outside the fixed compression ring, and a stainless steel compression ring is sleeved outside the stainless steel outer pipe; a circumferential annular groove is formed in the outer wall of the fixed compression ring; and alumina cement is filled in the annular groove. The invention adopts the fixed compression ring and the stainless steel compression ring for sealing protection, has good sealing performance, high cost performance and strong pressure-bearing and heat-insulating capability, and can reduce the cost of petroleum collection to a great extent. According to the invention, the aerogel coating layers of the heat-insulating pipe can be well sealed by adopting a special high-temperature high-pressure sealing method at the two ends of the heat-insulating pipe, so that a heat-insulating effect is provided for the conveying steel pipe, and the sealing effect is good.
Description
Technical Field
The invention relates to the field of composite pipes, in particular to a heat-insulating steel pipe and a sealing manufacturing method thereof.
Background
Energy conservation is called as a fifth energy source, heat preservation is a key factor influencing energy conservation, heat preservation pipelines are commonly used for conveying liquid, gas and other media, and in the fields of urban central heating, petrochemical pipeline transportation and the like, the laid pipelines need to be subjected to heat preservation treatment or prefabricated heat preservation pipes are adopted, so that heat loss in the transmission process is reduced, and the operation cost is reduced.
Traditional pipeline keeps warm, adopts insulation material such as glass wool, slag wool or pearlite mostly, and these materials hydroscopicity are stronger, and mechanical strength is poor, and the heat preservation effect is poor, and construction intensity of labour is big, and the environmental pollution influences operating personnel health, and production efficiency is low. A large amount of heat insulation materials also bring heavy burden to transportation, frequent engineering maintenance, high maintenance cost and short service life, and the requirements of people on heat insulation pipelines built in the modern society can not be met.
In recent years, researchers at home and abroad carry out intensive research in the field of composite heat-preservation conveying steel pipes, and although the composite heat-preservation conveying steel pipes have certain effect, the composite heat-preservation steel pipes on the market at present have complex processing technology, high manufacturing cost, poor sealing effect and insufficient pressure resistance, and although the heat-preservation effect is improved to a certain extent, the composite heat-preservation conveying steel pipes are still not ideal.
Disclosure of Invention
In order to solve the technical problems, the invention provides a heat-insulating steel pipe and a sealing manufacturing method thereof.
In order to achieve the purpose, the technical scheme of the invention is as follows: a heat-insulating steel pipe comprises a pipe body section and a sealing section which are axially connected; the sealing sections are positioned at two ends of the pipe body section; the tube body section comprises a conveying steel tube, an aerogel coating layer and a stainless steel outer tube which are sequentially sleeved from inside to outside; at the position of the sealing section, a fixed compression ring is sleeved outside the conveying steel pipe, the stainless steel outer pipe is sleeved outside the fixed compression ring, and the stainless steel compression ring is sleeved outside the stainless steel outer pipe; the fixed compression ring is of a seamless steel pipe structure and is in sealing contact with the conveying steel pipe; a circumferential annular groove is formed in the outer wall of the fixed compression ring; alumina cement is filled in the annular groove; the stainless steel press ring is located at the corresponding position of the annular groove.
As a preferable scheme of the invention, the length of the stainless steel pressure ring is 10-30 mm.
As a preferable scheme of the invention, the wall thickness of the position of the fixed compression ring, which is not the annular groove, is 8-12 mm.
As a preferable scheme of the invention, the fixed compression ring is made of high-quality carbon steel.
As a preferable scheme of the present invention, two annular grooves are provided on each of the fixed compression rings at an interval from each other.
As a preferable scheme of the present invention, the stainless steel pressing ring bends and deforms the stainless steel outer tube into the annular groove.
A sealing manufacturing method of a heat preservation steel pipe comprises the following steps:
step 1, mounting a fixed compression ring; the fixed compression ring is made of a high-quality carbon seamless steel pipe, the fixed compression ring is cut along the axial direction of the fixed compression ring in a linear cutting mode, the arc-shaped side wall is cut off from the fixed compression ring, the cut fixed compression ring is sleeved on the conveying steel pipe, the fixed compression ring is closed by a steel pipe closing-in machine, the fixed compression ring tightly embraces the heat-preservation conveying steel pipe, and gaps left after the fixed compression ring is closed are filled and welded by an argon arc welding machine;
As a preferable scheme of the manufacturing method of the seal, in the step 1, the wall thickness of the selected fixed compression ring is 8-12mm, and then an annular groove is formed in the surface of the fixed compression ring through machining.
In a preferred embodiment of the above-described method for manufacturing a seal, in step 1, the inner diameter of the stationary ring before wire cutting is 1.3 to 1.6 times the outer diameter of the steel pipe to be conveyed, and after wire cutting the stationary ring, the inner circumferential length of the stationary ring is equal to the outer diameter of the steel pipe to be conveyed.
The invention has the following beneficial effects: the heat-insulating steel pipe provided by the invention is an oil exploitation pipeline which takes a stainless steel outer pipe as a protection pipe, aerogel as a heat-insulating layer and a conveying steel pipe as a pressure-bearing pipe, and is sealed and protected by adopting a fixed compression ring and a stainless steel compression ring, so that the heat-insulating steel pipe has the advantages of good sealing performance, high cost performance and strong pressure-bearing and heat-insulating capabilities, the cost of oil collection can be reduced to a great extent, and about 60% of cost can be saved. According to the invention, the aerogel coating layers of the heat-insulating pipe can be well sealed by adopting a special high-temperature high-pressure sealing method at the two ends of the heat-insulating pipe, so that a heat-insulating effect is provided for the conveying steel pipe, the energy consumption of heat exchange is reduced, the processing method is simple, the sealing effect is good, and the safety and the reliability are realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of a steel insulated pipe according to the present invention.
Fig. 2 is a schematic structural diagram of the fixed compression ring before wire cutting in step 1 of the present invention.
Fig. 3 is a schematic structural view of the fixed compression ring after no wire cutting in step 1 of the present invention.
The corresponding part names indicated by the numbers and letters in the drawings:
1. conveying steel pipe 2, aerogel coating layer 3, stainless steel outer pipe
4. And the compression ring is fixed 5, the alumina cement is fixed 6, and the stainless steel compression ring is fixed.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
Referring to fig. 1 to 3, the present invention is an insulated steel pipe, which includes a pipe body section and a sealing section, wherein the pipe body section and the sealing section are axially connected. The body section includes from inside to outside transport steel pipe 1, aerogel coating 2 and the stainless steel outer tube 3 of establishing of cover in proper order. At sealed section position, be equipped with fixed clamping ring 4 in 1 overcoat of steel delivery pipe, be equipped with stainless steel outer tube 3 in 4 overcoat of fixed clamping ring, be equipped with stainless steel clamping ring 6 in 3 overcoat of stainless steel outer tube. The fixed compression ring 4 is of a seamless steel pipe structure and is in sealing contact with the conveying steel pipe 1. A circumferential annular groove is formed in the outer wall of the fixed compression ring 4; and the annular groove is filled with alumina cement 5. The stainless steel press ring 6 is arranged at the corresponding position of the annular groove. The stainless steel pressure ring 6 preferably has a length of 10-30mm, more preferably 18 mm. The length of the annular groove is slightly longer than that of the stainless steel pressure ring 6.
In order to have a good sealing effect, the fixed compression ring 4 is made of high-quality carbon steel. The wall thickness of the non-annular groove of the fixed compression ring 4 is 8-12 mm. Meanwhile, two annular grooves are arranged on each fixed compression ring 4 at intervals. The stainless steel pressing ring 6 enables the stainless steel outer pipe 3 to bend and deform towards the annular groove.
A sealing manufacturing method of a heat preservation steel pipe comprises the following steps:
step 1, installing a fixed compression ring 4; fixed clamping ring 4 adopts high-quality carbon element seamless steel pipe to line cutting's mode is followed 4 axial of fixed clamping ring and is cut fixed clamping ring 4, cuts off the arc lateral wall from fixed clamping ring 4, and the fixed clamping ring 4 cover after will cutting is established on carrying steel pipe 1, utilizes steel pipe necking-in machine to close up fixed clamping ring 4, makes fixed clamping ring 4 closely embrace heat preservation and carries steel pipe 1, utilizes the argon arc welding machine to carry out the filling welding to the gap that leaves behind the 4 setbacks of fixed clamping ring. Preferably, the wall thickness of the selected fixed compression ring 4 is 8-12mm, and then an annular groove is formed in the surface of the fixed compression ring 4 through machining. Specifically, the fixed compression ring 4 is a high-quality carbon seamless steel pipe (wC is less than or equal to 0.255, wP is less than or equal to 0.035, and wS is less than or equal to 0.035) with a wall thickness of 8-12mm, and is machined according to a drawing 2, wherein D is the outer diameter of the high-quality carbon seamless steel pipe, D is the inner diameter of the high-quality carbon seamless steel pipe, and D is preferably 1.5 times the outer diameter of the conveying steel pipe 1. The formed fixed compression ring 4 is cut off the redundant part in a linear cutting mode, the linear cutting direction is the radial direction, the inner perimeter of the removed fixed compression ring 4 is equal to the outer diameter of the conveying steel pipe 1, the inner perimeter is calculated according to the formula (1), and the cutting schematic diagram is shown in fig. 3. Referring to fig. 3, the inner circumference of the fixed compression ring 4 is calculated as:
in the formula, the inner perimeter of the C-fixed compression ring 4 is as follows: mm;
a-angle of linear cut, unit: (iv) DEG;
d-inside diameter of the high-quality carbon seamless steel pipe.
With the above embodiments, it can be seen that the present invention has the advantages: the heat-insulating steel pipe provided by the invention takes the stainless steel outer pipe 3 as a protection pipe, the aerogel as a heat-insulating layer, the oil-exploitation pipeline taking the conveying steel pipe 1 as a pressure-bearing pipe is sealed and protected by the fixed compression ring 4 and the stainless steel compression ring 6, the sealing performance is good, the cost performance is high, the pressure-bearing heat-insulating capability is strong, the cost of oil collection can be reduced to a great extent, and about 60% of cost can be saved. According to the invention, the aerogel coating layer 2 of the heat-insulating pipe can be well sealed by adopting a special high-temperature high-pressure sealing method at the two ends of the heat-insulating pipe, so that the heat-insulating effect is provided for the conveying steel pipe 1, the energy consumption of heat exchange is reduced, the processing method is simple, the sealing effect is good, and the safety and the reliability are realized.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A heat-insulating steel pipe is characterized by comprising a pipe body section and a sealing section which are axially connected; the sealing sections are positioned at two ends of the pipe body section; the tube body section comprises a conveying steel tube, an aerogel coating layer and a stainless steel outer tube which are sequentially sleeved from inside to outside; at the position of the sealing section, a fixed compression ring is sleeved outside the conveying steel pipe, the stainless steel outer pipe is sleeved outside the fixed compression ring, and the stainless steel compression ring is sleeved outside the stainless steel outer pipe; the fixed compression ring is of a seamless steel pipe structure and is in sealing contact with the conveying steel pipe; a circumferential annular groove is formed in the outer wall of the fixed compression ring; alumina cement is filled in the annular groove; the stainless steel press ring is located at the corresponding position of the annular groove.
2. The steel penstock of claim 1, wherein the stainless steel pressure ring has a length of 10-30 mm.
3. The steel pipe for heat preservation according to claim 2, wherein the wall thickness of the fixed compression ring at the position other than the annular groove is 8-12 mm.
4. The insulated steel pipe of claim 3, wherein the stationary compression ring is made of high quality carbon steel.
5. The insulated steel pipe of claim 1 wherein two of said annular grooves are spaced apart from each other in each of said clamping rings.
6. The steel pipe for heat preservation according to claim 5, wherein the stainless steel press ring bends and deforms the stainless steel outer pipe into the annular groove.
7. The sealing manufacturing method of the heat preservation steel pipe is characterized by comprising the following steps:
step 1, mounting a fixed compression ring; the fixed compression ring is made of a high-quality carbon seamless steel pipe, the fixed compression ring is cut along the axial direction of the fixed compression ring in a linear cutting mode, the arc-shaped side wall is cut off from the fixed compression ring, the cut fixed compression ring is sleeved on the conveying steel pipe, the fixed compression ring is closed by a steel pipe closing-in machine, the fixed compression ring tightly embraces the heat-preservation conveying steel pipe, and gaps left after the fixed compression ring is closed are filled and welded by an argon arc welding machine;
step 2, coating alumina cement; coating alumina cement on the annular groove of the fixed compression ring;
step 3, installing a stainless steel pressure ring; sleeving the heat-insulating pipe with the fixed compression rings at two ends into the stainless steel outer pipe, sleeving the stainless steel compression rings on the surface of the stainless steel outer pipe, arranging the stainless steel compression rings at the annular grooves of the fixed compression rings, respectively arranging two stainless steel compression rings at two ends, closing up the stainless steel compression rings by using a steel pipe closing-up machine, and welding and filling the gaps of the closed stainless steel compression rings by using stainless steel welding wires.
8. The method for manufacturing the heat-insulating steel pipe seal according to claim 7, wherein in the step 1, the selected fixed compression ring has a wall thickness of 8-12mm, and then an annular groove is formed in the surface of the fixed compression ring through machining.
9. The method for manufacturing a heat-insulating steel pipe in a sealing manner according to claim 8, wherein in step 1, the inner diameter of the fixed pressure ring before wire cutting is 1.3 to 1.6 times the outer diameter of the conveying steel pipe, and after wire cutting is performed on the fixed pressure ring, the inner circumference of the fixed pressure ring is equal to the outer diameter of the conveying steel pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010207959.8A CN111288249A (en) | 2020-03-23 | 2020-03-23 | Heat-insulating steel pipe and sealing manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010207959.8A CN111288249A (en) | 2020-03-23 | 2020-03-23 | Heat-insulating steel pipe and sealing manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111288249A true CN111288249A (en) | 2020-06-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010207959.8A Pending CN111288249A (en) | 2020-03-23 | 2020-03-23 | Heat-insulating steel pipe and sealing manufacturing method thereof |
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| Country | Link |
|---|---|
| CN (1) | CN111288249A (en) |
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2020
- 2020-03-23 CN CN202010207959.8A patent/CN111288249A/en active Pending
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