阅读说明：本技术 一种石油管路防护装置及防护方法 (Petroleum pipeline protection device and protection method ) 是由 不公告发明人 于 2021-01-21 设计创作，主要内容包括：本发明公开了一种石油管路防护装置及防护方法,包括大油管和小油管,所述大油管和小油管之间活动套设有防护管件；所述防护管件包括大号套管,所述大号套管的一侧焊接有缓冲管,所述缓冲管远离大号套管的一侧焊接有小号套管；所述大号套管的外侧靠近大油管的一端螺纹套设有和大油管配合使用的大号连接组件,本发明,当石油从大号套管流入小号套管时,连接处的液压会增加,通过带有一号加固环框的缓冲管对液压的缓冲,以及通过带有二号加固环框的小号套管对小油管外侧的防护,有效防止大油管和小油管的连接处崩开,从而提高了大油管和小油管之间连接的稳定性,从而有效提升石油的运输效率。(The invention discloses a petroleum pipeline protection device and a protection method, wherein the petroleum pipeline protection device comprises a large oil pipe and a small oil pipe, wherein a protection pipe fitting is movably sleeved between the large oil pipe and the small oil pipe; the protective pipe fitting comprises a large-size sleeve, a buffer pipe is welded on one side of the large-size sleeve, and a small-size sleeve is welded on one side, far away from the large-size sleeve, of the buffer pipe; according to the invention, when oil flows into the small-size casing pipe from the large-size casing pipe, the hydraulic pressure at the joint can be increased, the hydraulic pressure is buffered through the buffer pipe with the first reinforcing ring frame, and the small-size casing pipe with the second reinforcing ring frame protects the outer side of the small-size oil pipe, so that the joint of the large oil pipe and the small oil pipe is effectively prevented from being broken, the connection stability between the large oil pipe and the small oil pipe is improved, and the oil transportation efficiency is effectively improved.)

1. The utility model provides a petroleum pipeline protector, includes big oil pipe (1) and little oil pipe (2), its characterized in that: a protective pipe fitting (3) is movably sleeved between the large oil pipe (1) and the small oil pipe (2);

the protective pipe fitting (3) comprises a large-size sleeve (31), a buffer pipe (32) is welded on one side of the large-size sleeve (31), and a small-size sleeve (33) is welded on one side, far away from the large-size sleeve (31), of the buffer pipe (32);

a large connecting assembly (4) matched with the large oil pipe (1) for use is sleeved at one end, close to the large oil pipe (1), of the outer side of the large casing pipe (31) in a threaded manner, a small connecting assembly (5) matched with the small oil pipe (2) for use is fixedly installed at one end, close to the small oil pipe (2), of the outer side of the small casing pipe (33), and two groups of the small connecting assemblies (5) are symmetrically distributed;

the inner wall of the large casing pipe (31) is fixedly connected with a large sealing assembly (6) matched with the large oil pipe (1) for use, and the inner wall of the small casing pipe (33) is fixedly connected with a small sealing assembly (7) matched with the small oil pipe (2) for use;

an outer limiting ring (11) is fixedly sleeved on the outer side of the large oil pipe (1).

2. The petroleum pipeline protection device of claim 1, wherein: large-size sealing assembly (6) is including large-size spacing ring (61), large-size spacing ring (61) fixed connection is in one side that buffer tube (32) are close to large-size sleeve pipe (31) inner wall, large-size spacing ring (61) middle part is fixed to be inserted and is equipped with large-size intubate (62), one side activity cover that large-size intubate (62) outside is close to large-size spacing ring (61) is equipped with large-size sealed inner ring (63), one side activity grafting of big oil pipe (1) is in large-size sleeve pipe (31), one side activity of big oil pipe (1) is cup jointed in the outside of large-size intubate (62), one end of big oil pipe (1) and one side in close contact with of large-size sealed inner ring (63), one side of buffer tube (32) is kept away from with large-size sleeve pipe (31) to one side of outer spacing ring (11).

3. The petroleum pipeline protection device of claim 1, wherein: the large-size connecting assembly (4) comprises a large-size outer screw cylinder (41) and a large-size sealing outer ring (42), a limiting cavity (411) is formed in one side of the large-size outer screw cylinder (41), the large-size sealing outer ring (42) is movably clamped in one side of the limiting cavity (411), a plurality of groups of insertion rods (43) distributed in an annular array are fixedly connected to one side, close to the inner wall of the limiting cavity (411), of the large-size sealing outer ring (42), insertion grooves (412) matched with the insertion rods (43) are formed in the inner wall of the limiting cavity (411), springs (44) are movably clamped in the insertion grooves (412) in a clamping mode, one side of each insertion rod (43) is movably clamped in the corresponding insertion groove (412) and is in contact with one side of each spring (44), one side, far away from the large-size sleeve (31), of the large-size sleeve (41) movably penetrates through the large-size outer screw cylinder (41), one side, far away from the large-size sleeve (31) and one side of the large-size sealing outer ring (, the large-size outer screw cylinder (41) is sleeved outside the large-size sleeve (31) in a threaded manner.

4. The petroleum pipeline protection device of claim 1, wherein: the buffer tube (32) is of a bucket-shaped structure, and a first reinforcing ring frame (321) is fixedly arranged in the buffer tube (32).

5. The petroleum pipeline protection device of claim 1, wherein: a second reinforcing ring frame (331) is fixedly arranged in the small sleeve (33).

6. The petroleum pipeline protection device of claim 1, wherein: the small-size sealing component (7) comprises a small-size limiting ring (71), the small-size limiting ring (71) is fixedly connected to one side, close to the buffer tube (32), of the inner wall of the small-size sleeve (33), a small-size insertion tube (72) is fixedly inserted in the middle of the small-size limiting ring (71), a small-size sealing inner ring (73) is movably sleeved at one end of the outer side of the small-size insertion tube (72) close to the small-size limiting ring (71), a sealing convex ring (74) is fixedly arranged on one side of the small-size insertion tube (72) far away from the small-size limiting ring (71), one side of the small oil pipe (2) is movably inserted in the small casing pipe (33), one side of the small oil pipe (2) is movably sleeved outside the small-size insertion pipe (72), one end of the small oil pipe (2) is tightly contacted with one side of the small-size sealing inner ring (73), the outer side of the sealing convex ring (74) is contacted with the inner wall of the small oil pipe (2).

7. A petroleum pipeline protecting device according to claim 6, wherein: the sealing convex ring (74) is of a circular truncated cone-shaped annular structure.

8. A petroleum pipeline protecting device according to claim 6, wherein: the small-size connecting assembly (5) comprises a small-size outer sleeve (51) and a fastening convex column (52), the small-size outer sleeve (51) is fixedly sleeved on the outer side of the small-size oil pipe (2), the fastening convex column (52) is fixedly connected on the outer side of the small-size sleeve (33), a small-size sealing outer ring (54) is fixedly arranged on the inner wall of the small-size outer sleeve (51), one side of the small-size sleeve (33) far away from a buffer tube (32) is movably sleeved in the small-size outer sleeve (51) and is in close contact with one side of the small-size sealing outer ring (54), a fastening ring frame (55) is movably sleeved in the middle of the fastening convex column (52), a limiting frame (56) is sleeved on the upper portion of the fastening convex column (52), the outer side of the small-size outer sleeve (51) is fixedly connected with a limiting convex column (53) corresponding to the fastening convex column (52), and the limiting convex column (53) is movably sleeved in one side of the fastening convex column (, and a fastening bolt (57) is inserted into one side of the fastening ring frame (55) close to the limiting convex column (53) through threads, and one side of the fastening bolt (57) is clamped in the corresponding limiting convex column (53) through threads.

9. A protection method of a petroleum pipeline protection device is characterized by comprising the following steps:

step one, installation between the protective pipe fitting (3) and the large oil pipe (1)

One side of a large oil pipe (1) is movably inserted in a large-size sleeve (31) in a sleeved mode, one side of the large oil pipe (1) is movably sleeved on the outer side of a large-size insertion pipe (62) in a sleeved mode, one end of the large oil pipe (1) is in tight contact with one side of a large-size sealing inner ring (63), effective sealing of the inner side of a joint between the large oil pipe (1) and the large-size sleeve (31) is achieved, one side of an outer limiting ring (11) is in contact with one side, far away from a buffer pipe (32), of the large sleeve (31), effective sealing of the outer side of the joint between the large oil pipe (1) and the large-size sleeve (31) is achieved, then a large-size outer screw cylinder (41) is sleeved on the outer side of the large-size sleeve (31) in a threaded mode until one side, far away from the large-size sleeve (31), of the outer limiting ring (11) is in tight contact with one side of a large-size sealing outer ring (42), sealing connection assembly between, when the large-size connecting assembly (4) of the large oil pipe (1) is connected, one side, far away from the large-size sleeve (31), of the outer limiting ring (11) is always in close contact with one side of the large-size sealing outer ring (42) through the tension of the spring (44) on the inserting rod (43), so that the sealing performance of a connecting part between the large oil pipe (1) and the large-size sleeve (31) is effectively improved;

step two, mounting between the protective pipe fitting (3) and the small oil pipe (2)

One side of a small oil pipe (2) is movably inserted in a small-size sleeve (33), one side of the small oil pipe (2) is movably sleeved on the outer side of a small-size insertion pipe (72), one end of the small oil pipe (2) is in tight contact with one side of a small-size sealing inner ring (73), effective sealing of the inner side of a joint between the small oil pipe (2) and the small-size sleeve (33) is realized, at the moment, the outer side of a sealing convex ring (74) is in contact with the inner wall of the small oil pipe (2), effective sealing of the inner sides of the small oil pipe (2) and a small-size sealing assembly (7) is realized, immediately, fastening ring frames (55) on the upper side and the lower side are respectively sleeved on the middle of a fastening convex column (52) and the outer side of a limiting convex column (53), the fastening ring frames (55) are prevented from being separated from the fastening convex column (52) through a limiting frame (56), then, fastening bolts (57) on the two sides are screwed, and one side of each fastening bolt (57, the fastening connection between the fastening convex column (52) and the limiting convex column (53) is realized, so that the small oil pipe (2) and the small-size sleeve (33) are prevented from being cracked, and the connection stability between the small oil pipe (2) and the small-size sleeve (33) is further improved;

step three, buffer protection at the joint between the large oil pipe (1) and the small oil pipe (2)

When oil flows into the small-size casing pipe (33) from the large-size casing pipe (31), the hydraulic pressure of the joint can be increased, the hydraulic buffer is buffered through the buffer pipe (32) with the first reinforcing ring frame (321), and the small-size casing pipe (33) with the second reinforcing ring frame (331) protects the outer side of the small oil pipe (2), so that the joint of the large oil pipe (1) and the small oil pipe (2) is effectively prevented from being broken, the connection stability between the large oil pipe (1) and the small oil pipe (2) is improved, and the transportation efficiency of the oil is effectively improved.

Technical Field

The invention relates to the technical field of petroleum pipeline protection, in particular to a petroleum pipeline protection device and a protection method.

Background

The petroleum pipeline is composed of oil pipes and accessories thereof, and is provided with corresponding oil pump units according to the requirements of the technological process, and is designed and installed into a complete pipeline system for completing the tasks of oil receiving, unloading and transferring, wherein the pipes of the petroleum pipeline are generally steel pipes, are connected into a long-distance pipeline by using connecting devices such as welding, flanges and the like, and are subjected to opening and closing control and flow regulation by using valves, and the petroleum pipeline mainly comprises conveying processes such as isothermal conveying, heating conveying, sequential conveying and the like, wherein the petroleum pipeline is one of important parts of petroleum conveying;

when carrying out oil transmission among the prior art, can carry out sometimes to connect between two sets of not equidimension oil pipeline, nevertheless the junction lacks stable connection protection component between two sets of not equidimension oil pipeline, when oil flowed into small-size oil pipeline from large-size oil pipeline, the hydraulic pressure of junction can increase, causes the junction to collapse between large-size oil pipeline and the small-size oil pipeline easily.

Disclosure of Invention

The invention aims to provide a petroleum pipeline protection device and a protection method, which aim to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a petroleum pipeline protection device comprises a large oil pipe and a small oil pipe, wherein a protection pipe fitting is movably sleeved between the large oil pipe and the small oil pipe;

the protective pipe fitting comprises a large-size sleeve, a buffer pipe is welded on one side of the large-size sleeve, and a small-size sleeve is welded on one side, far away from the large-size sleeve, of the buffer pipe;

a large connecting assembly matched with the large oil pipe is sleeved at one end, close to the large oil pipe, of the outer side of the large sleeve in a threaded manner, a small connecting assembly matched with the small oil pipe is fixedly installed at one end, close to the small oil pipe, of the outer side of the small sleeve, and the small connecting assemblies are symmetrically distributed;

the inner wall of the large casing is fixedly connected with a large sealing assembly matched with the large oil pipe, and the inner wall of the small casing is fixedly connected with a small sealing assembly matched with the small oil pipe;

an outer limiting ring is fixedly sleeved on the outer side of the large oil pipe.

Preferably, No. one sealing component includes No. one large spacing ring, No. one large spacing ring fixed connection is in one side that No. one large side of sleeve pipe inner wall is close to the buffer tube, No. one large spacing ring middle part is fixed to be inserted and is equipped with No. one large intubate, one side activity cover that No. one large spacing ring is close to in the intubate outside is equipped with No. one large sealed inner ring, one side activity grafting of big oil pipe is in No. one large sleeve pipe, one side activity of big oil pipe cup joints in the outside of No. one large intubate, one side in close contact with of one end of big oil pipe and No. one side in close contact with of No. one large spacing ring, one side of outer spacing ring and.

Preferably, No. one side that large-size coupling assembling includes the outer screw section of thick bamboo of large-size and the sealed outer loop of large-size, spacing chamber has been seted up to one side of the outer screw section of thick bamboo of large-size, the activity joint of the sealed outer loop of large-size is in one side in spacing chamber, one side fixedly connected with that the sealed outer loop of large-size is close to spacing intracavity wall is the multiunit inserted bar that annular array distributes, the slot that uses with the inserted bar cooperation is seted up to the inner wall in spacing chamber, equal activity card in the slot is equipped with the spring, one side activity joint of inserted bar and the one side contact of spring in the slot that corresponds, No. one side activity that large-size sheathed tube was kept away from to big oil pipe runs through the outer screw section of thick bamboo of large-size, No. one side of sheathed tube and one side in close contact with the sealed outer loop.

Preferably, the buffer tube is of a bucket-shaped structure, and a first reinforcing ring frame is fixedly arranged in the buffer tube.

Preferably, a second reinforcing ring frame is fixedly arranged in the small-size sleeve.

Preferably, the small-size sealing assembly comprises a small-size limiting ring, the small-size limiting ring is fixedly connected to one side, close to the buffer tube, of the inner wall of the small-size sleeve, a small-size insertion tube is fixedly inserted in the middle of the small-size limiting ring, a small-size sealing inner ring is movably sleeved at one end, close to the small-size limiting ring, of the outer side of the small-size insertion tube, a sealing convex ring is fixedly arranged on one side, away from the small-size limiting ring, of the small-size insertion tube, one side of the small-size oil tube is movably inserted in the small-size sleeve, one side of the small-size oil tube is movably sleeved outside the small-size insertion tube, one end of the small-size oil tube is in close contact with one side of the small.

Preferably, the sealing convex ring is of a circular truncated cone-shaped annular structure.

Preferably, the small-size connecting assembly comprises a small-size outer sleeve and a fastening convex column, the small-size outer sleeve is fixedly sleeved on the outer side of the small oil pipe, the fastening convex column is fixedly connected with the outer side of the small-size sleeve, a small-size sealing outer ring is fixedly arranged on the inner wall of the small-size outer sleeve, one side of the small-size sleeve pipe, which is far away from the buffer tube, is movably sleeved in the small-size outer sleeve pipe and is tightly contacted with one side of the small-size sealing outer ring, a fastening ring frame is movably sleeved in the middle of the fastening convex column, a limit frame is sleeved on the upper part of the fastening convex column in a threaded manner, the outer side of the small-size outer sleeve is fixedly connected with a limiting convex column corresponding to the fastening convex column, the limiting convex column is movably sleeved in one side of the fastening ring frame far away from the fastening convex column, and a fastening bolt is inserted into the thread on one side of the fastening ring frame close to the limiting convex column, and the thread on one side of the fastening bolt is clamped in the corresponding limiting convex column.

A protection method of a petroleum pipeline protection device is characterized by comprising the following steps:

step one, installation between a protective pipe fitting and a large oil pipe

One side of a large oil pipe is movably inserted in the large-size sleeve, one side of the large oil pipe is movably sleeved on the outer side of the large insertion pipe, one end of the large oil pipe is in tight contact with one side of the large-size sealing inner ring, effective sealing on the inner side of a joint between the large oil pipe and the large-size sleeve is realized, one side of an outer limiting ring is in contact with one side of the large sleeve, which is far away from a buffer pipe, so that effective sealing on the outer side of the joint between the large oil pipe and the large-size sleeve is realized, then, a large-size outer screw tube is sleeved on the outer side of the large-size sleeve in a threaded manner until one side of the outer limiting ring, which is far away from the large-size sleeve, is in tight contact with one side of the large-size sealing outer ring, so that connection between the large oil pipe, the large-size sleeve and the large-size connecting assembly is realized, wherein, one side of the outer limiting ring, which is far away from the large, thereby effectively improving the sealing property of the joint between the large oil pipe and the large casing pipe;

step two, installation between the protective pipe fitting and the small oil pipe

One side of the small oil pipe is movably inserted in the small casing pipe, one side of the small oil pipe is movably sleeved on the outer side of the small insertion pipe, one end of the small oil pipe is tightly contacted with one side of the small sealing inner ring, effective sealing of the inner side of the joint between the small oil pipe and the small casing pipe is realized, at the moment, the outer side of the sealing convex ring is contacted with the inner wall of the small oil pipe to realize effective sealing between the small oil pipe and the inner side of the small-size sealing component, then the fastening ring frames on the upper side and the lower side are respectively sleeved on the middle part of the fastening convex column and the outer side of the limiting convex column, the fastening ring frame is prevented from being separated from the fastening convex column through the limiting frame, then the fastening bolts at two sides are screwed, one side of each fastening bolt is in threaded joint with the corresponding limiting convex column, the fastening connection between the fastening convex column and the limiting convex column is realized, therefore, the small oil pipe and the small casing pipe are prevented from being cracked, and the connection stability between the small oil pipe and the small casing pipe is further improved;

step three, buffer protection at the joint between the large oil pipe and the small oil pipe

When oil flowed into the small-size sleeve pipe from large-size sleeve pipe, the hydraulic pressure of junction can increase, through the buffer tube that has a reinforcement ring frame to hydraulic buffering to and through the protection in the small-size sleeve pipe that has No. two reinforcement ring frames to the small oil pipe outside, prevent effectively that the junction of big oil pipe and small oil pipe from collapsing open, thereby improved the stability of being connected between big oil pipe and the small oil pipe, thereby effectively promote the conveying efficiency of oil.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, the large-size connecting assembly, the small-size connecting assembly, the large-size sealing assembly and the small-size sealing assembly are arranged to carry out sealing connection between the large oil pipe and the small oil pipe as well as between the small oil pipe and the protective pipe fitting, so that the stability and the sealing property of the joint between the large oil pipe and the small oil pipe are effectively improved, when oil flows into the small-size casing pipe from the large-size casing pipe, the hydraulic pressure at the joint can be increased, the hydraulic pressure is buffered through the buffer pipe with the first reinforcing ring frame, and the outer side of the small oil pipe is protected through the small-size casing pipe with the second reinforcing ring frame, so that the joint between the large oil pipe and the small oil pipe is effectively prevented from being broken, the stability of the connection between.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of structural connections of a large oil pipe and a large casing pipe, and a large connecting assembly and a large sealing assembly according to the present invention;

FIG. 3 is an enlarged view taken at A of FIG. 2 in accordance with the present invention;

FIG. 4 is a schematic view of the structural connection of the small oil pipe and the small size seal assembly of the present invention;

FIG. 5 is a schematic structural connection diagram of a small oil pipe and a small-size connection assembly according to the present invention.

In the figure: 1. a large oil pipe; 2. a small oil pipe; 3. a protective tube; 4. a large-size connecting assembly; 5. a small-size connecting component; 6. a large seal assembly; 7. a small seal assembly; 11. an outer limit ring; 31. a large-size sleeve; 32. a buffer tube; 321. a first reinforcing ring frame; 33. a small-size sleeve; 331. a second reinforcing ring frame; 41. a large outer barrel; 411. a limiting cavity; 412. a slot; 42. a large-size sealing outer ring; 43. inserting a rod; 44. a spring; 51. a small-size outer sleeve; 52. fastening the convex column; 53. a limiting convex column; 54. a small-size sealing outer ring; 55. fastening the ring frame; 56. a limiting frame; 57. fastening a bolt; 61. a large-size limiting ring; 62. large-size intubation; 63. a large-size sealing inner ring; 71. a small-size limiting ring; 72. a small-size cannula; 73. a small-size sealing inner ring; 74. and sealing the convex ring.

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.

Referring to fig. 1-5, the present invention provides a technical solution: a petroleum pipeline protection device comprises a large oil pipe 1 and a small oil pipe 2, wherein a protection pipe fitting 3 is movably sleeved between the large oil pipe 1 and the small oil pipe 2;

the protective pipe fitting 3 comprises a large-size sleeve 31, a buffer pipe 32 is welded on one side of the large-size sleeve 31, and a small-size sleeve 33 is welded on one side, far away from the large-size sleeve 31, of the buffer pipe 32; buffer tube 32 is hopper-shaped structure, carry out the connection between large size sleeve pipe 31 and the small size sleeve pipe 33, the fixed reinforcement ring frame 321 that is equipped with in buffer tube 32, when oil flows in small size sleeve pipe 33 from large size sleeve pipe 31, the hydraulic pressure of junction can increase, buffer tube 32 through having reinforcement ring frame 321 is to hydraulic buffering, prevent that large oil pipe 1 and small oil pipe 2 junction from collapsing open, thereby the stability of connecting between large oil pipe 1 and the small oil pipe 2 has been improved, thereby effectively promote the conveying efficiency of oil.

A large connecting assembly 4 matched with the large oil pipe 1 is sleeved at one end, close to the large oil pipe 1, of the outer side of the large sleeve 31 in a threaded manner, a small connecting assembly 5 matched with the small oil pipe 2 is fixedly installed at one end, close to the small oil pipe 2, of the outer side of the small sleeve 33, and the small connecting assemblies 5 are symmetrically distributed;

the inner wall of the large casing 31 is fixedly connected with a large sealing assembly 6 matched with the large oil pipe 1 for use, and the inner wall of the small casing 33 is fixedly connected with a small sealing assembly 7 matched with the small oil pipe 2 for use;

the outer side of the large oil pipe 1 is fixedly sleeved with an outer limiting ring 11.

Large-size sealing assembly 6 includes large-size spacing ring 61, large-size spacing ring 61 fixed connection is in one side that large-size sleeve pipe 31 inner wall is close to buffer tube 32, large-size spacing ring 61 middle part is fixed to be inserted and is equipped with large-size intubate 62, one side activity cover that large-size intubate 62 outside is close to large-size spacing ring 61 is equipped with large-size sealed inner ring 63, one side activity grafting of large oil pipe 1 is in large-size sleeve pipe 31, one side activity cup joints the outside at large-size intubate 62 of large oil pipe 1, one side in close contact with of large oil pipe 1's one end and large-size sealed inner ring 63, realize the inboard effective sealing of junction between large oil pipe 1 and the large-size sleeve pipe 31, one side of outer spacing ring 11 and one side contact that large-size sleeve pipe 31 kept away from buffer tube 32, realize the effective sealing in the junction outside between large oil pipe 1 and large-size sleeve pipe 31, thereby the leakproofness of junction between large oil pipe.

The large-size connecting assembly 4 comprises a large-size outer barrel 41 and a large-size sealing outer ring 42, a limiting cavity 411 is formed in one side of the large-size outer barrel 41, the large-size sealing outer ring 42 is movably clamped on one side of the limiting cavity 411, a plurality of groups of insertion rods 43 distributed in an annular array are fixedly connected to one side, close to the inner wall of the limiting cavity 411, of the large-size sealing outer ring 42, slots 412 matched with the insertion rods 43 for use are formed in the inner wall of the limiting cavity 411, springs 44 are movably clamped in the slots 412, one side of each insertion rod 43 is movably clamped in the corresponding slot 412 and is in contact with one side of each spring 44, one side, far away from the large-size sleeve 31, of the large-size oil pipe 1 movably penetrates through the large-size outer barrel 41, the insertion rods 43 are tensioned through the springs 44, when the large-size connecting assembly 4 of the large oil pipe 1 is connected, one side, far away from the large-size sleeve 31, of, The sealing of being connected between large-size sleeve pipe 31 and large-size coupling assembling 4, the screw thread of large-size outer spiral shell 41 cup joints in large-size sleeve pipe 31's the outside, realizes the threaded connection between large oil pipe 1, large-size sleeve pipe 31 and large-size coupling assembling 4, conveniently dismantles.

A second reinforcing ring frame 331 is fixedly arranged in the small casing 33, the small casing 33 with the second reinforcing ring frame 331 protects the outer side of the small oil pipe 2, the joint of the large oil pipe 1 and the small oil pipe 2 is further prevented from being broken, the connection stability between the large oil pipe 1 and the small oil pipe 2 is further improved, and the petroleum transportation efficiency is further effectively improved.

The small-size sealing assembly 7 comprises a small-size limiting ring 71, the small-size limiting ring 71 is fixedly connected to one side, close to the buffer tube 32, of the inner wall of the small-size sleeve 33, a small-size insertion tube 72 is fixedly inserted in the middle of the small-size limiting ring 71, a small-size sealing inner ring 73 is movably sleeved at one end, close to the small-size limiting ring 71, of the outer side of the small-size insertion tube 72, a sealing convex ring 74 is fixedly arranged at one side, away from the small-size limiting ring 71, of the small-size insertion tube 72, one side of the small oil tube 2 is movably inserted in the small-size sleeve 33, one side of the small oil tube 2 is movably sleeved on the outer side of the small-size insertion tube 72, one end of the small oil tube 2 is in close contact with one side of the small-size sealing inner ring 73, effective sealing; the outer side of the sealing convex ring 74 is contacted with the inner wall of the small oil pipe 2, so that the effective sealing of the small oil pipe 2 and the inner side of the small-size sealing assembly 7 is realized.

The small connecting component 5 comprises a small outer sleeve 51 and a fastening convex column 52, the small outer sleeve 51 is fixedly sleeved on the outer side of the small oil pipe 2, the fastening convex column 52 is fixedly connected on the outer side of the small sleeve 33, a small sealing outer ring 54 is fixedly arranged on the inner wall of the small outer sleeve 51, one side of the small sleeve 33, which is far away from the buffer tube 32, is movably sleeved in the small outer sleeve 51 and is in close contact with one side of the small sealing outer ring 54, so that effective sealing on the outer side of a joint between the small oil pipe 2 and the small sleeve 33 is realized, the sealing performance of the joint between the small oil pipe 2 and the small sleeve 33 is improved, a fastening ring frame 55 is movably sleeved in the middle of the fastening convex column 52, a limiting frame 56 is sleeved on the upper part of the fastening convex column 52 in a threaded manner, the fastening ring frame 55 is prevented from being separated from the fastening convex column 52, a limiting convex column 53 corresponding to the fastening convex column 52 is fixedly connected on the outer side of the small outer sleeve 51, the, fastening bolt 57 is inserted to one side screw thread that fastening ring frame 55 is close to spacing projection 53, and one side screw thread joint of fastening bolt 57 realizes the fastening connection between fastening projection 52 and the spacing projection 53 in the spacing projection 53 that corresponds to prevent to collapse between little oil pipe 2 and the small size sleeve pipe 33, further improved the stability of being connected between little oil pipe 2 and the small size sleeve pipe 33.

A petroleum pipeline protection device and a protection method thereof comprise the following steps:

step one, installation between the protective pipe fitting 3 and the large oil pipe 1

One side of a large oil pipe 1 is movably inserted in a large-size sleeve 31, one side of the large oil pipe 1 is movably sleeved on the outer side of a large insertion pipe 62, one end of the large oil pipe 1 is in tight contact with one side of a large-size sealing inner ring 63, effective sealing of the inner side of a joint between the large oil pipe 1 and the large-size sleeve 31 is realized, one side of an outer limiting ring 11 is in contact with one side of the large-size sleeve 31 far away from a buffer pipe 32, effective sealing of the outer side of the joint between the large oil pipe 1 and the large-size sleeve 31 is realized, then, a large-size outer screw cylinder 41 is sleeved on the outer side of the large-size sleeve 31 in a threaded manner until one side of the outer limiting ring 11 far away from the large-size sleeve 31 is in tight contact with one side of a large-size sealing outer ring 42, sealing of connection among the large oil pipe 1, the large-size sleeve 31 and the large-size connection assembly 4 is realized, wherein, tension is, one side of the outer limiting ring 11, which is far away from the large-size sleeve 31, is always in close contact with one side of the large-size sealing outer ring 42, so that the sealing property of the joint between the large oil pipe 1 and the large-size sleeve 31 is effectively improved;

step two, mounting between the protective pipe fitting 3 and the small oil pipe 2

One side of the small oil pipe 2 is movably inserted in the small-size sleeve 33, one side of the small oil pipe 2 is movably sleeved on the outer side of the small-size insertion pipe 72, one end of the small oil pipe 2 is tightly contacted with one side of the small-size sealing inner ring 73, effective sealing of the inner side of a joint between the small oil pipe 2 and the small-size sleeve 33 is realized, at the moment, the outer side of the sealing convex ring 74 is contacted with the inner wall of the small oil pipe 2, effective sealing of the inner sides of the small oil pipe 2 and the small-size sealing assembly 7 is realized, immediately, the fastening ring frames 55 on the upper side and the lower side are respectively sleeved on the middle part of the fastening convex column 52 and the outer side of the limiting convex column 53, the fastening ring frames 55 are prevented from being separated from the fastening convex column 52 through the limiting frame 56, then, the fastening bolts 57 on the two sides are screwed, one side of the fastening bolt 57 is clamped in the corresponding limiting convex column 53, fastening connection between the fastening convex column 52 and the limiting convex column 53 is realized, the stability of the connection between the small oil pipe 2 and the small-size sleeve 33 is further improved;

step three, buffer protection at the joint between the large oil pipe 1 and the small oil pipe 2

When oil flows into the small-size casing pipe 33 from the large-size casing pipe 31, the hydraulic pressure at the joint can be increased, the hydraulic buffer is buffered through the buffer pipe 32 with the first reinforcing ring frame 321, and the small-size casing pipe 33 with the second reinforcing ring frame 331 protects the outer side of the small oil pipe 2, so that the joint of the large oil pipe 1 and the small oil pipe 2 is effectively prevented from being broken, the connection stability between the large oil pipe 1 and the small oil pipe 2 is improved, and the oil transportation efficiency is effectively improved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.