CN112361128A - Vacuum heat-insulation heating oil delivery pipe and vacuum heat-insulation heating oil delivery pipe - Google Patents

Abstract

The invention provides a vacuum heat-insulation heating oil delivery pipe, which comprises an inner pipe; the outer pipe is sleeved outside the inner pipe, and a vacuum layer is arranged between the inner pipe and the outer pipe; and the heating piece is arranged in the vacuum layer. The vacuum layer is arranged, the heating piece is arranged in the vacuum layer, so that the medium can be heated and insulated in the conveying process, and crude oil can be insulated and conveyed for a long distance, so that impurities are prevented from being condensed in the oil conveying pipe, and the conveying capacity is improved; compared with the existing oil delivery pipe wrapped or coated with heat insulation materials, the vacuum heat insulation and heat preservation oil delivery pipe has higher thermal resistance and better heat preservation effect, thereby avoiding using a sectional relay mode of a heat pump station, increasing the distance of heating and oil delivery and reducing the cost.

Description

Vacuum heat-insulation heating oil delivery pipe and vacuum heat-insulation heating oil delivery pipe

Technical Field

The invention relates to the technical field of petroleum pipeline transportation, in particular to a vacuum heat-insulation heating oil pipeline and a vacuum heat-insulation heating oil pipeline.

Background

In the technical field of petroleum pipeline transportation, because the contents of asphalt and paraffin in heavy crude oil are higher, the heavy crude oil can be condensed on the inner wall of a pipeline during pipeline transportation, and the effective pipe diameter of the pipeline can be greatly reduced and even blocked after a long time.

In order to solve this problem, several heating pump stations are usually installed in the petroleum pipeline in sections, and the asphalt and paraffin wax are melted by heating to pipeline the heavy crude oil. However, the existing oil delivery pipes are simple in heat insulation structure, and all the oil delivery pipes are coated with heat insulation materials as heat insulation layers, once the heat insulation layers are damaged, the heat insulation effect of the pipelines is rapidly reduced, and the temperature of hot oil coming out of the heating pump station is rapidly reduced, so that the heating pump stations have to be arranged at intervals according to actual conditions for relay, and accordingly, the conveying cost is increased and energy is wasted.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a vacuum heat-insulation heating oil delivery pipe, which solves the problems that the heat-insulation structure of the oil delivery pipe in the prior art is simple and easy to damage, and the heat-insulation effect is poor.

According to the embodiment of the invention, the vacuum heat-insulation and heat-preservation heating oil delivery pipe comprises

An inner tube; the outer pipe is sleeved outside the inner pipe, and a vacuum layer is arranged between the inner pipe and the outer pipe;

and the heating piece is arranged in the vacuum layer.

Further, the outer side of the inner pipe is wound with an installation layer, and the heating element is arranged on the installation layer.

The vacuum pipe further comprises a support ring, the support ring is arranged in the vacuum layer to separate the inner pipe from the outer pipe, and a support piece used for preventing the support ring from moving in the vacuum layer is further arranged in the vacuum layer.

Further, an elastic tube is arranged at one end of the inner tube, and an insertion portion for inserting the elastic tube is arranged at the other end of the inner tube.

Further, still include the head that is used for sealed vacuum layer.

Further, the seal head is one or two of an elastic seal head and a plane seal head.

Furthermore, the head is elastic, connecting flanges are arranged at two ends of the outer pipe, and the outer pipe is fixedly and hermetically connected with the connecting flanges.

Further, the inner pipe and the outer pipe are straight pipes or bent pipes matched with each other.

The application also provides a thermal-insulated heat preservation heating oil pipeline in vacuum, and it is formed by the defeated oil pipe equipment of a plurality of thermal-insulated heat preservation in vacuum, defeated oil pipe in thermal-insulated heat preservation in vacuum includes:

an inner tube A; the outer pipe A is sleeved outside the inner pipe A, and a vacuum layer A is arranged between the inner pipe A and the outer pipe A; a support ring A for separating the inner pipe A and the outer pipe A is arranged in the vacuum layer A; one end of the inner tube A is provided with an elastic tube A, the other end of the inner tube A is provided with an insertion part A for inserting the elastic tube A, the vacuum layer A is sealed by a seal head A,

a heating element A is arranged in the vacuum layer A of at least one vacuum heat insulation oil delivery pipe.

Furthermore, after the adjacent vacuum heat-insulation oil delivery pipes are connected, a heat-insulation material layer is wound outside the elastic pipe A, and a gasket is sleeved outside the heat-insulation material layer.

The technical principle of the invention is as follows: the heat generated by the heating element acts on the inner pipe through heat conduction to heat a medium in the inner pipe, so that the asphalt and paraffin are melted without blocking the pipeline, and an interlayer between the inner pipe and the outer pipe forms a vacuum layer which can effectively block the heat conduction to prevent the outward propagation loss of temperature.

Compared with the prior art, the vacuum layer and the heating piece are arranged in the vacuum layer, so that the medium can be heated and heat can be preserved in the conveying process, crude oil can be subjected to heat preservation conveying for a long distance, and therefore impurities are prevented from being condensed in the oil conveying pipe, and conveying capacity is improved; compared with the existing oil delivery pipe wrapped or coated with heat insulation materials, the vacuum heat insulation heating oil delivery pipe has larger thermal resistance and better heat insulation effect, and meanwhile, the heating piece is not easy to damage in the vacuum layer, so that the sectional relay mode of a heat pump station is not used, the heating oil delivery distance is increased, and the cost is reduced.

Drawings

Fig. 1 is a schematic structural view of a vacuum heat-insulation heating oil delivery pipe in the first embodiment of the present invention.

Fig. 2 is an assembly diagram of two vacuum heat-insulation heating oil delivery pipes in the first embodiment of the invention.

Fig. 3 is a schematic structural diagram of a gasket according to an embodiment of the invention.

Fig. 4 is a side view of a washer according to a first embodiment of the present invention.

Fig. 5 is a side view of a washer according to a second embodiment of the present invention.

FIG. 6 is a schematic view of an assembly structure of a vacuum heat-insulation heating oil pipeline in the third embodiment of the present invention

In the above drawings: 1. an open portion; 2. an elastic tube; 211. an elastic tube A; 3. an elastic end enclosure; 31. an elastic end enclosure A; 4. a first threaded hole; 5. connecting a flange A; 51. connecting a flange C; 6. an inner tube; 61. an inner tube A; 7. an outer tube; 71. an outer tube A; 8. a support member; 9. a support ring; 91. a support ring A; 10. a planar end enclosure; 101. a planar seal head A; 11. a second threaded hole; 12. a connecting flange B; 121. connecting a flange T; 13. an insertion portion; 131. an insertion part A; 14. mounting a layer; 141. mounting a layer A; 15. a heat generating member; 151. a heating member A; 16. a vacuum tight connector; 161. a vacuum seal connector A; 17. a screw; 171. a screw A; 18. a layer of thermal insulation material; 181. a thermal insulation material layer A; 19. a gasket; 191. a gasket A; 20. a welding point; 21. a recessed portion; 211. an elastic tube A; 22. a projection; 23. and a through hole.

Detailed Description

The technical solution of the present invention is further explained with reference to the drawings and the embodiments. It should be noted that, in the description of the present application, the terms "first", "second", and the like are used merely for convenience in describing different components, and are not to be construed as indicating or implying a sequential relationship, relative importance, or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include at least one of the feature.

Example one

As shown in fig. 1 to 4, an embodiment of the present invention provides a vacuum heat insulation heating oil pipeline, including an inner pipe 6; the outer tube 7, the outer tube 7 cover is located the inner tube 6 outside, and inner tube 6 adopts corrosion-resistant stainless steel pipe or titanium alloy pipe, and outer tube 7 adopts the bright and great steel pipe of wall thickness of inner wall, can effectively resist general non-violent collision, does not need often to maintain, can increase of service life, and the pipeline of double-deck settlement can show the protective capacities of reinforcing pipeline. The inner pipe 6 and the outer pipe 7 are straight pipes or bent pipes matched with each other to adapt to various occasions, and the inner pipe 6 and the outer pipe 7 are both straight pipes. The outer side of the inner tube 6 is wound with an installation layer 14 made of an insulating and heat conducting material, a heating element 15 is arranged in the installation layer 14, specifically, the installation layer 14 is made of a mica glass fiber tape, the heating element 15 is a heating resistance wire, referring to fig. 1, the heating resistance wire is spirally wound in the mica glass fiber tape so as to enable the heating resistance wire to be insulated from the inner tube 6, referring to fig. 1 continuously, a vacuum sealing connector 16 is welded on the outer tube 7, outgoing lines at two ends of the heating resistance wire are connected with a vacuum side terminal of the vacuum sealing connector 16, during heating operation, a power line can be connected with the vacuum sealing connector 16 through a plug, the heating resistance wire generates heat after being electrified and transfers the heat to the inner tube 6 through the mica glass fiber tape, and then crude oil in. Preferably, the inner wall of the outer tube 7 is polished and electroplated to be a smooth reflective surface, and the inner wall of the outer tube 7 is the reflective surface which can effectively reflect the heat radiation from the inner tube. In processing, in order to reduce the manufacturing cost of the outer tube 7, a layer of reflective film can be adhered to the inner wall of the outer tube 7, so that the polishing and electroplating process of the inner wall of the outer tube is omitted.

In order to keep a certain interval between the inner pipe 6 and the outer pipe 7, a plurality of support rings 9 are sleeved on the outer wall of the installation layer 14, and the support rings 9 are made of a heat-insulating material which is hard and does not generate gas, such as a water glass vermiculite pipe; a plurality of support rings 9 are sleeved on the mounting layer 14 at intervals and abut against the inner wall of the outer tube 7 at the same time, in order to prevent the support rings 9 from moving in the vacuum layer along the axial direction of the inner tube 6 or the outer tube 7, a support member 8 which fills the space and fixes the support rings 9 can be arranged between the mounting layer 14 and the outer tube 7, specifically, the support member 8 is heat-insulating rock wool, and the heat-insulating rock wool abuts against the support rings 9 to prevent the support rings 9 from moving.

In order to connect a plurality of vacuum heat-insulation heating oil delivery pipes, a connecting flange is arranged at the end part of the outer pipe 7, specifically, a connecting flange A5 is welded at one end of the outer pipe 7, and a connecting flange B12 is welded at the other end of the outer pipe 7, so that the outer pipe 7 and the connecting flange are fixedly and hermetically connected, and a hot spinning forming process can be adopted, which is not illustrated. Referring to fig. 1, the inner wall of a connection flange a 5 is of a stepped structure, a groove is formed in the top surface of a connection flange b 12, a first threaded hole 4 is formed in the connection flange a 5, a second threaded hole 11 is formed in the connection flange b 12, and an elastic pipe 2 is welded to the end portion of an inner pipe 6 corresponding to the connection flange a 5. specifically, in a feasible embodiment, the elastic pipe 2 is a corrugated pipe, the end portion of the inner pipe 6 corresponding to the connection flange b 12 extends to the end surface of the connection flange b 12 to form an insertion portion 13 for inserting the corrugated pipe of an adjacent vacuum heat insulation and heat preservation heating oil delivery pipe, and an opening portion 1 is formed by flaring of the port of the corrugated pipe so that the insertion portion 13 can be conveniently inserted to facilitate the head-to-tail connection of the. The elastic tube 2 is arranged for offsetting the stress of the inner tube 6 caused by thermal expansion and contraction during heating, and avoiding the leakage of crude oil caused by pipeline damage.

In order to isolate the space between the inner pipe 6 and the outer pipe 7 from the outside atmosphere, a seal head used for sealing the space between the inner pipe 6 and the outer pipe 7 is arranged, the seal head is one or two of an elastic seal head 3 and a planar seal head 10, one end of the seal head is connected to the end part of the inner pipe 6, the other end of the seal head is connected to the end part of the corresponding outer pipe 7 to play a role in sealing, if the planar seal head 10 is selected, the capacity of offsetting the thermal expansion and cold contraction stress of the inner pipe 6 and the outer pipe 7 is poor, so the embodiment adopts the mode that the elastic seal head 3 is adopted for the inner pipe 6 and the outer pipe 7 at one end, the planar seal head 10 is adopted for the inner pipe 6 and the outer pipe. Specifically, the inner edge of the elastic seal head 3 is welded with the end part of the inner pipe 6 on the corrugated pipe side, the outer edge of the elastic seal head 3 is welded with the stepped structure of the connecting flange A5, the plane seal head 10 is arranged in the groove, the inner edge of the plane seal head 10 is welded with the other end of the inner pipe 6, and the outer edge of the plane seal head 10 is welded with the connecting flange B12, so that the space between the inner pipe 6 and the outer pipe 7 is sealed. The outer tube 7 is provided with vacuum holes, and the space between the inner tube 6 and the outer tube 7 is vacuumized to form a vacuum layer to eliminate air convection heat conduction, so as to effectively prevent the outward transmission loss of temperature.

After the adjacent vacuum heat insulation heating oil delivery pipes are connected, that is, after the insertion part 13 of one vacuum heat insulation heating oil delivery pipe is inserted into the open part 1 of the corrugated pipe of the other vacuum heat insulation heating oil delivery pipe, the two are welded to form a welding point 20, referring to fig. 2, a heat insulation material layer 18 is formed by winding a heat insulation material such as heat insulation rock wool outside the corrugated pipe, then, a gasket 19 is sleeved outside the heat insulation material layer 18, and a screw 17 penetrates through the first threaded hole 4 and the second threaded hole 11 to connect the connecting flange A5 of one vacuum heat insulation heating oil delivery pipe with the connecting flange B12 of the other vacuum heat insulation heating oil delivery pipe, so that the two vacuum heat insulation heating oil delivery pipes are connected.

Specifically, referring to fig. 3-4, the gasket 19 is of a semicircular splicing type, that is, the gasket 19 includes two semicircular gaskets, the two ends of each semicircular gasket are respectively provided with a concave portion 21 and a convex portion 22, the convex portion 22 of one semicircular gasket is clamped into the concave portion of the other semicircular gasket, so that splicing can be completed, the two semicircular gaskets are respectively provided with a through hole 23 for the screw 17 to pass through, and when the screw 17 passes through the first threaded hole 4 and the second threaded hole 11, the gasket 19 located between the connection flange a 5 and the connection flange b 12 can also be passed through by the screw 17.

Example two

Referring to fig. 5, the difference between the first embodiment and the second embodiment is that the upper and lower planes of the semicircular washer are not parallel to each other to form an inclined plane, so as to be suitable for connecting two vacuum heat-insulation heating oil delivery pipes turning at a small angle.

EXAMPLE III

Referring to fig. 6, the vacuum heat insulation heating oil delivery pipe is assembled by a plurality of vacuum heat insulation oil delivery pipes to form an economical and efficient oil delivery pipe.

The embodiment of the invention provides a vacuum heat-insulation oil delivery pipe, which comprises an inner pipe A61; the outer tube A71, the outer tube A71 cover is located the inner tube A61 outside, and inner tube A61 adopts corrosion-resistant stainless steel pipe or titanium alloy pipe, and outer tube A71 adopts the bright and great steel pipe of wall thickness of inner wall, can effectively resist general non-violent collision, does not need often to maintain, can increase of service life, and the pipeline of double-deck setting can show the protective capacities who strengthens the pipeline. The inner pipe A61 and the outer pipe A71 are straight pipes or bent pipes matched with each other so as to adapt to various occasions, and the inner pipe A61 and the outer pipe A71 are both straight pipes. Preferably, the inner wall of the outer tube A71 is polished and electroplated into a smooth reflective surface, and the inner wall of the outer tube A71 is the reflective surface and can effectively reflect heat radiation from the inner tube. During processing, in order to reduce the manufacturing cost of the outer tube A71, a reflective film can be adhered to the inner wall of the outer tube A71, so that the polishing and electroplating process of the inner wall of the outer tube is omitted.

In order to keep a certain interval between the inner pipe A61 and the outer pipe A71, a plurality of support rings A91 are sleeved on the outer wall of the inner pipe A61, and the support rings A91 are made of a heat-insulating material which is hard and does not separate out gas, such as a water glass vermiculite pipe; a plurality of support rings A91 are arranged on the inner pipe A61 at intervals and abut against the inner wall of the outer pipe A71 at the same time.

In order to connect a plurality of vacuum heat-insulation oil delivery pipes, a connecting flange a is arranged at the end of the outer pipe a71, specifically, a connecting flange third 51 is welded at one end of the outer pipe a71, and a connecting flange third 121 is welded at the other end of the outer pipe a71, so as to realize the fixed and sealed connection between the outer pipe a71 and the connecting flange a, although a hot spinning forming process can be adopted, which is not illustrated here. Referring to fig. 6, the inner wall of the connecting flange 51 is of a stepped structure, a groove is formed in the top surface of the connecting flange piece 121, threaded holes are formed in both the connecting flange piece 51 and the connecting flange piece 121, and an elastic pipe a211 is welded to the end of an inner pipe a61 corresponding to the connecting flange piece 51, specifically, in a practical embodiment, the elastic pipe a211 is a corrugated pipe, the end of the inner pipe a61 corresponding to the connecting flange piece 121 extends to the end surface of the connecting flange piece 121 to form an insertion portion a131 for inserting the corrugated pipe of an adjacent vacuum heat insulation oil delivery pipe, and the port of the corrugated pipe is flared to form an open portion a, so that the insertion portion a131 is inserted to facilitate the head-to-tail connection of the adjacent two vacuum heat insulation oil delivery pipes. The elastic tube A211 is arranged for offsetting the stress of the inner tube A61 caused by thermal expansion and contraction during heating, and avoiding the damage of the pipeline to cause the leakage of crude oil.

In order to isolate the space between the inner tube a61 and the outer tube a71 from the outside atmosphere, a seal head a for sealing the space between the inner tube a61 and the outer tube a71 is provided, the seal head a is one or two of an elastic seal head a31 and a planar seal head a101, one end of the seal head is connected to the end of the inner tube a61, the other end of the seal head is connected to the end of the corresponding outer tube a71, so as to achieve a sealing effect, if the planar seal head a101 is selected, the ability of the planar seal head a101 to counteract the thermal expansion and cold contraction stress of the inner tube a61 and the outer tube a71 is poor, so that the inner tube a61 and the outer tube a71 at one end are sealed by using the elastic seal head a31, the inner tube a61 and the outer tube a71 at the other end are sealed by using the. Specifically, the inner edge of the elastic seal head A31 is welded with the end of the inner pipe A61 on the corrugated pipe side, the outer edge of the elastic seal head A31 is welded with the stepped structure of the connecting flange 51, the plane seal head A101 is arranged in the groove, the inner edge of the plane seal head A101 is welded with the other end of the inner pipe A61, and the outer edge of the plane seal head A101 is welded with the connecting flange D121, so that the space between the inner pipe A61 and the outer pipe A71 is sealed. The outer pipe A71 is provided with vacuum holes, and the space between the inner pipe A61 and the outer pipe A71 is vacuumized to form a vacuum layer A to eliminate the heat conduction of air convection, so as to effectively prevent the outward transmission loss of temperature.

After the adjacent vacuum heat insulation oil delivery pipes are connected, that is, after the insertion part a131 of one vacuum heat insulation oil delivery pipe is inserted into the open part 1 of the bellows of the other vacuum heat insulation oil delivery pipe, referring to fig. 6, a heat insulation material layer a181 is formed by winding a heat insulation material, such as heat insulation rock wool, outside the bellows, then a gasket a191 is sleeved outside the heat insulation material layer a181, and a screw a171 penetrates through threaded holes on the connecting flange third 51 and the connecting flange third 121 to connect the connecting flange third 51 of one vacuum heat insulation oil delivery pipe with the connecting flange third 121 of the other vacuum heat insulation oil delivery pipe, thereby connecting the two vacuum heat insulation oil delivery pipes.

Specifically, referring to fig. 3-4, the washer a191 is a semicircular splicing type washer having the same structure as that of the first or second embodiment, and will not be described herein again.

With reference to fig. 6, in order to avoid blockage caused by condensation of some impurities during the transportation of crude oil, a heating element a151 is disposed in the vacuum layer a of at least one vacuum heat-insulation oil transportation pipe, and in a specific operation, the heating element a151 may be disposed in proportion, for example, a heating element a151 is disposed in the vacuum layer a of a new vacuum heat-insulation oil transportation pipe after every 10 vacuum heat-insulation oil transportation pipes. Specifically, an installation layer a141 made of an insulating and heat conducting material is wound on the outer side of the inner tube a61, a heating element a151 is arranged in the installation layer a141, specifically, the installation layer a141 is made of a mica glass fiber tape, the heating element a151 is a heating resistance wire, referring to fig. 6, the heating resistance wire is spirally wound in the mica glass fiber tape to insulate the heating resistance wire from the inner tube a61, referring to fig. 6 continuously, a vacuum seal connector a161 is welded on the outer tube a71, leading-out wires at two ends of the heating resistance wire are connected with a vacuum side terminal of the vacuum seal connector a161, during heating operation, a power line can be connected with the vacuum seal connector a161 through a plug, the heating resistance wire heats after being electrified and transfers heat to the inner tube a61 through the mica glass fiber tape, and then crude oil in the inner tube a61 is heated. At this time, the support rings a91 are disposed on the outer wall of the mounting layer a141, and a plurality of support rings a91 are alternately sleeved on the mounting layer a141 and simultaneously abut against the inner wall of the outer tube a 71.

The problem of prior art crude oil, especially heavy crude oil transportation in impurity blocks up oil pipe has been solved to this application for thereby crude oil can keep warm at longer distance and carry and avoid condensing at defeated oil pipe inner wall, thereby improves the conveying capacity, and exposed hard steel pipe can show the protective capacities who strengthens the pipeline simultaneously. The application can also be used for conveying other liquid and solid-liquid mixtures needing heat preservation conveying. The material of the inner pipe is changed into a low-temperature resistant material, and the inner pipe can also be used for conveying low-temperature liquid or gas.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims (10)

1. The utility model provides a defeated oil pipe of vacuum insulation heating which characterized in that: comprises that

An inner tube (6);

the outer tube (7) is sleeved outside the inner tube (6), and a vacuum layer is arranged between the inner tube (6) and the outer tube (7);

and a heat generating member (15) disposed in the vacuum layer.

2. The vacuum heat insulation heating oil delivery pipe according to claim 1, characterized in that: the outer side of the inner pipe (6) is wound with an installation layer (14), and the heating element (15) is arranged on the installation layer (14).

3. The vacuum heat insulation heating oil delivery pipe according to claim 1, characterized in that: the vacuum pipe is characterized by further comprising a support ring (9), wherein the support ring (9) is arranged in the vacuum layer to separate the inner pipe (6) from the outer pipe (7), and a support piece (8) used for preventing the support ring (9) from moving in the vacuum layer is further arranged in the vacuum layer.

4. The vacuum heat insulation heating oil delivery pipe according to claim 1, characterized in that: the elastic pipe (2) is arranged at one end of the inner pipe (6), and an insertion part (13) for inserting the elastic pipe (2) is arranged at the other end of the inner pipe (6).

5. The vacuum heat insulation heating oil delivery pipe according to claim 1, characterized in that: the vacuum layer sealing device further comprises a sealing head used for sealing the vacuum layer.

6. The vacuum heat insulation heating oil delivery pipe according to claim 5, characterized in that: the seal head is one or two of an elastic seal head (3) and a plane seal head (10).

7. The vacuum heat insulation heating oil delivery pipe according to claim 4, characterized in that: and the two ends of the outer pipe (7) are respectively provided with a connecting flange, and the outer pipe (7) is fixedly and hermetically connected with the connecting flanges.

8. The vacuum heat insulation heating oil pipeline according to any one of claims 1 to 7, characterized in that: the inner pipe (6) and the outer pipe (7) are straight pipes or bent pipes which are matched with each other.

9. The utility model provides a thermal-insulated heat preservation heating oil pipeline in vacuum which characterized in that: it is assembled by a plurality of vacuum heat insulation oil delivery pipes, vacuum heat insulation oil delivery pipe includes:

an inner tube A (61); the outer tube A (71) is sleeved outside the inner tube A (61), and a vacuum layer A is arranged between the inner tube A (61) and the outer tube A (71); a support ring A (91) for separating the inner pipe A (61) and the outer pipe A (71) is arranged in the vacuum layer A; one end of the inner tube A (61) is provided with an elastic tube A (211), the other end of the inner tube A (61) is provided with an insertion part A (131) for inserting the elastic tube A (211), and the vacuum sealing device further comprises a seal head A for sealing the vacuum layer A,

a heating element A (151) is arranged in the vacuum layer A of at least one vacuum heat insulation oil delivery pipe.

10. The vacuum heat insulation heating oil pipeline according to claim 9, characterized in that: after the adjacent vacuum heat-insulation oil delivery pipes are connected, a heat-insulation material layer A (181) is wound outside the elastic pipe A (211), and a gasket A (191) is sleeved outside the heat-insulation material layer A (181).

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