CN112845430B

CN112845430B - Anti-freezing petroleum conveying pipe with cleaning mechanism

Info

Publication number: CN112845430B
Application number: CN202110100473.9A
Authority: CN
Inventors: 宋均
Original assignee: Sesaijialijia Beijing Petrochemical Equipment Co ltd
Current assignee: Sesaijialijia Beijing Petrochemical Equipment Co ltd
Priority date: 2021-01-26
Filing date: 2021-01-26
Publication date: 2022-11-08
Anticipated expiration: 2041-01-26
Also published as: CN112845430A

Abstract

The invention relates to the technical field of anti-freezing petroleum conveying pipes, in particular to an anti-freezing petroleum conveying pipe with a cleaning mechanism, which comprises a first pipeline, wherein the right side of the first pipeline is movably connected with a second pipeline, the left end of the second pipeline is fixedly connected with a connecting ring, the right side of the first pipeline is provided with a first groove matched with the connecting ring for use, and the left side of the second pipeline is fixedly sleeved with a sealing ring.

Description

Anti-freezing petroleum conveying pipe with cleaning mechanism

Technical Field

The invention relates to the technical field of anti-freezing petroleum delivery pipes, in particular to an anti-freezing petroleum delivery pipe with a cleaning mechanism.

Background

Petroleum, also called as crude oil, is a viscous and dark brown liquid, and because the texture of petroleum is viscous, when the petroleum is transported in cold regions or seasons, because common petroleum transportation pipes are easy to crack at low temperature, the transportation of the petroleum is affected, and people can select to use anti-freezing petroleum transportation pipes to transport the petroleum in order to adapt to the transportation environment.

Current type oil delivery pipe that prevents frostbite is at the in-process of carrying oil, often remain on the pipeline inner wall for remaining oil, the phenomenon of condensing can then be produced in untimely clearance, long-time the use causes the pipeline to block up easily, influence the transport work of oil, and, current type oil delivery pipe that prevents frostbite connects for the most is not inseparable enough, at the in-process of oil transport, can drive the pipeline and slightly rock because the change in size of flow in the pipeline, and current type oil delivery pipe that prevents frostbite is after rocking many times, the phenomenon of oil leak can take place for the junction of two pipelines, in addition, current oil delivery pipe junction does not have leakage autoalarm mostly, lead to the staff can not in time overhaul the pipeline, cause the unnecessary loss.

Disclosure of Invention

The invention aims to solve the defects in the prior art, and provides an anti-freezing petroleum conveying pipe with a cleaning mechanism, which has the advantages of reasonable design and ingenious structure, and through the mutual matching of the structures, the anti-freezing petroleum conveying pipe not only can automatically clean the inner wall of the pipe when petroleum is conveyed to avoid the pipe from being blocked by residual petroleum, but also can be tightly connected with the two pipes, and can timely send out maintenance alarm when the oil leakage phenomenon occurs at the joint of the pipes, thereby reducing unnecessary loss, having good market competitiveness and being worthy of recommendation.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a design one kind has clean mechanism's type oil conveying pipe prevents frostbite, including first pipeline, the right side swing joint of first pipeline has the second pipeline, the left end fixedly connected with go-between of second pipeline, the first recess that uses with the go-between cooperation is seted up on the right side of first pipeline, the left side external fixation of second pipeline has cup jointed the sealing ring, and the sealing ring setting in the outside of go-between and form the recess with the go-between, the external fixation of first pipeline has cup jointed the first sealed pad that uses with the sealing ring cooperation, the outside of one side relative of first pipeline and second pipeline is all fixed the fixed lantern ring that has cup jointed, two the outside of the fixed lantern ring is all fixed to be cup jointed and is connected the cover, two the equal fixedly connected with second of one end relative of connection cover is sealed, two common threaded connection has a plurality of screw rods between the connection cover, and is a plurality of the equal threaded connection in the left side outside of screw rod has the nut.

Preferably, the inner wall of first pipeline and second pipeline is the equal fixedly connected with fixed plate in both sides about, two sets of equal fixedly connected with connecting rod between the fixed plate, two the outside of connecting rod is evenly fixed respectively and has cup jointed a plurality of fixed sleeves, and is a plurality of the equal activity in fixed sleeve's outside has cup jointed movable sleeve, and is a plurality of fixed sleeve's the outside of right side all fixedly has cup jointed the annular dog that uses with the cooperation of movable sleeve.

Preferably, it is a plurality of the equal fixedly connected with resistance piece in activity sheathed tube left side, and the equal activity of a plurality of resistance pieces cup joints in the outside of connecting rod, and is a plurality of the equal fixedly connected with locating piece in inside of resistance piece, a plurality of constant head tanks that use with the locating piece cooperation are evenly seted up to the upper end of connecting rod, activity sheathed tube inside is provided with the spring that uses with the cooperation of resistance piece, and a plurality of springs all set up in a plurality of fixed sheathed tube left sides.

Preferably, a plurality of second recesses have evenly been seted up respectively on the inner wall of first pipeline and second pipeline, and are a plurality of the inside of second recess all rotates and is connected with the second taper ring gear, the equal fixedly connected with doctor-bar in upper and lower both ends of second taper ring gear inner wall, two the equal fixedly connected with first dead lever in one side that the doctor-bar is relative, it is a plurality of the second spout that uses with the cooperation of first dead lever is all seted up on movable sleeve's surface.

Preferably, it is a plurality of the equal fixedly connected with limit slide of the left and right sides of second toper ring gear, the first spout that uses with a plurality of limit slide cooperation is all seted up to the inside of first pipeline and second pipeline, the inside first pivot pole that all rotates and is connected with of upper end of first pipeline and second pipeline, two the outside of first pivot pole evenly fixed cover respectively has connect a plurality ofly with the first bevel gear of second toper ring gear meshing.

Preferably, a movable groove is formed in the upper end of one side of the mutual principle of the first pipeline and the second pipeline, and two ends, far away from each other, of the first rotating rods extend to the inside of the movable groove respectively and are fixedly sleeved with second bevel gears.

Preferably, the upper end of one side that first pipeline and second pipeline kept away from each other all rotates and is connected with the second dwang, two the inside and fixedly connected with of the lower extreme military performance of second dwang even movable groove and second bevel gear meshing's third bevel gear, two the upper end of second dwang extends to the outside and the fixedly connected with knob of first pipeline and second pipeline respectively.

Preferably, a through hole is formed in the lower end of one of the connecting covers, the lower end of the through hole is communicated with a U-shaped pipe, limiting blocks are symmetrically and fixedly connected to the inner wall of the right side of the U-shaped pipe, and a buoyancy plate is movably connected to the upper ends of the limiting blocks.

Preferably, the top end of the inner wall of the right side of the U-shaped pipe is fixedly connected with an induction switch, the lower end of the second pipeline is provided with an alarm matched with the induction switch for use, the upper end of the buoyancy plate is fixedly connected with a second fixing rod, and the upper end of the second fixing rod is fixedly connected with a contact block matched with the induction switch for use.

The invention provides an anti-freezing petroleum delivery pipe with a cleaning mechanism, which has the beneficial effects that:

the connecting ring on the left side of the second pipeline extends into the first groove on the right side of the first pipeline, the sealing ring is sleeved outside the first sealing gasket, so that the two connecting covers are mutually abutted, at the moment, a plurality of screw rods can sequentially penetrate through the two connecting covers and sequentially screw the nuts, so that the first pipeline and the second pipeline are connected, the bearing capacity of the joint of the two pipelines can be increased due to the arrangement of the plurality of screw rods, the stability of the connection of the two pipelines is increased, the phenomenon of oil leakage at the joint of the pipelines can be effectively prevented, and the tightness between the pipeline connections can be effectively increased due to the arrangement of the first sealing gasket, so that the pipelines are more practical;

when the joint of the two pipelines leaks, oil flows into the U-shaped pipe through the through hole, the buoyancy plate pushes the second fixing rod to move upwards by utilizing the buoyancy of the oil when the liquid level of the oil rises, the touch block is pushed to move upwards by the second fixing rod, when the touch block is in touch with the inductive switch, the inductive switch turns on the alarm through the wire, the alarm gives an alarm to prompt a worker to overhaul in time, unnecessary loss is avoided, and the practicability of the pipelines is improved;

when the flow in the pipeline is large, the oil pushes the plurality of resistance pieces to move towards the right side when flowing towards the right side, the resistance pieces push the limiting slide block and push the movable sleeve to move outside the fixed sleeve when moving, meanwhile, due to the action of the positioning block and the positioning groove, the resistance pieces and the movable sleeve move in a translation mode when moving, when the movable sleeve moves towards the right side, the two first fixing rods always slide on the inner wall of the first rotating rod on the surface of the movable sleeve, the two first fixing rods push the two scraping pieces to rotate inside the first pipeline and the second pipeline when sliding, so that the oil residue on the inner walls of the first pipeline and the second pipeline is automatically scraped in the process of conveying the oil, when the flow in the pipeline is small, the second rotating rod can be rotated through the knob, and the third bevel gear is rotated through the second rotating rod, the first rotating rod is driven to rotate through the meshing action of the third bevel gear and the second bevel gear, the first bevel gears are driven to rotate through the first rotating rod, the first bevel gears are respectively meshed with the second bevel gear rings when rotating, so that the second bevel gear rings are driven to rotate in the second groove, the second bevel gear rings can drive the scraping blades to rotate in the second pipeline and the first pipeline, residues on the inner wall of the pipeline are manually scraped, the resistance pieces and the scraping blades are arranged, the fluidity of oil in the pipeline can be utilized when the oil is conveyed, the inner wall of the pipeline is automatically cleaned, the pipeline is prevented from being blocked by the residual oil, the normal use of the pipeline is ensured, and the overall practicability of the pipeline is improved;

the invention has reasonable design and ingenious structure, can automatically clean the inner wall of the pipeline when conveying petroleum by the mutual matching of the structures, avoids the pipeline from being blocked by the residual petroleum, has tighter connection between the two pipelines, can send out maintenance alarm in time when the oil leakage phenomenon occurs at the connection part of the pipelines, reduces unnecessary loss, has good market competitiveness, is worthy of recommendation, has good market competitiveness and is worthy of recommendation.

Drawings

Fig. 1 is a front view of an anti-freezing type oil delivery pipe having a cleaning mechanism according to the present invention;

FIG. 2 is a partial structural sectional view of an anti-freezing type oil transportation pipe having a cleaning mechanism according to the present invention;

FIG. 3 is a cross-sectional view of an antifreeze type oil delivery pipe having a cleaning mechanism according to the present invention;

FIG. 4 is a left sectional view showing a partial structure of an anti-freezing type oil transportation pipe having a cleaning mechanism according to the present invention;

FIG. 5 is a partial structural sectional view of an anti-freezing type oil transportation pipe having a cleaning mechanism according to the present invention;

FIG. 6 is a left sectional view showing a partial structure of an anti-freezing type oil transportation pipe having a cleaning mechanism according to the present invention;

FIG. 7 is an enlarged view of the part A of the antifreeze type petroleum pipeline with a cleaning mechanism according to the present invention;

fig. 8 is an enlarged schematic view of the part B of the antifreeze type petroleum conveying pipe with a cleaning mechanism according to the present invention.

In the figure: 1. a first conduit; 2. a second pipe; 3. a connecting ring; 4. a first groove; 5. a seal ring; 6. A first gasket; 7. a fixed collar; 8. a connecting cover; 9. a second gasket; 10. a screw; 11. a nut; 12. a fixing plate; 13. a connecting rod; 14. fixing the sleeve; 15. an active cannula; 16. an annular stop block; 17. A resistance sheet; 18. positioning blocks; 19. positioning a groove; 20. a spring; 21. a limiting slide block; 22. a first chute; 23. scraping a blade; 24. a first fixing lever; 25. a second chute; 26. a first rotating lever; 27. a first bevel gear; 28. a movable groove; 29. a second bevel gear; 30. a second rotating rod; 31. a third bevel gear; 32. a knob; 33. a U-shaped pipe; 34. a limiting block; 35. a buoyancy plate; 36. a second fixing bar; 37. a contact block; 38. An inductive switch; 39. an alarm; 40. a through hole; 41. a second groove; 42. and (4) a bevel gear 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.

Referring to fig. 1 to 8, an anti-freezing oil delivery pipe with a cleaning mechanism comprises a first pipeline 1, a second pipeline 2 is movably connected to the right side of the first pipeline 1, a connecting ring 3 is fixedly connected to the left end of the second pipeline 2, a first groove 4 matched with the connecting ring 3 for use is formed in the right side of the first pipeline 1, a sealing ring 5 is fixedly sleeved on the outer portion of the left side of the second pipeline 2, the sealing ring 5 is arranged on the outer portion of the connecting ring 3 and forms a groove with the connecting ring 3, a first sealing gasket 6 matched with the sealing ring 5 for use is sleeved on the outer portion of the first pipeline 1, a fixing sleeve ring 7 is fixedly sleeved on the outer portion of one side opposite to the second pipeline 2, connecting covers 8 are fixedly sleeved on the outer portions of the two fixing sleeve rings 7, a second sealing gasket 9 is fixedly connected to one ends opposite to the two connecting covers 8, a plurality of screws 10 are commonly screwed between the two connecting covers 8, nuts 11 are commonly screwed on the outer portions of the left sides of the plurality of the screws 10, the plurality of screws 10 are arranged, bearing capacity of the joints of the two pipelines can be effectively increased, and the two pipelines can be prevented from shaking in the use process of the two pipelines due to the phenomenon that the two pipelines are loosened during use, and stability of the pipelines is increased during use.

The left and right sides of the inner walls of the first pipeline 1 and the second pipeline 2 are fixedly connected with fixing plates 12, connecting rods 13 are fixedly connected between two groups of fixing plates 12, the outer parts of the two connecting rods 13 are respectively and uniformly and fixedly sleeved with a plurality of fixing sleeves 14, the outer parts of the fixing sleeves 14 are movably sleeved with movable sleeves 15, the outer parts of the right sides of the fixing sleeves 14 are respectively and fixedly sleeved with annular stoppers 16 matched with the movable sleeves 15 for use, the left sides of the movable sleeves 15 are respectively and fixedly connected with resistance pieces 17, the resistance pieces 17 are movably sleeved on the outer parts of the connecting rods 13, positioning blocks 18 are respectively and fixedly connected with the inner parts of the resistance pieces 17, the upper ends of the connecting rods 13 are respectively and uniformly provided with a plurality of positioning grooves 19 matched with the positioning blocks 18 for use, springs 20 matched with the resistance pieces 17 are arranged in the movable sleeves 15, and the springs 20 are arranged on the left sides of the fixing sleeves 14, the inner walls of the first pipeline 1 and the second pipeline 2 are respectively and uniformly provided with a plurality of second grooves 41, the interiors of the plurality of second grooves 41 are respectively and rotatably connected with a second conical ring gear 42, the upper end and the lower end of the inner wall of the second conical ring gear 42 are respectively and fixedly connected with a scraping blade 23, one side of each of the two opposite scraping blades 23 is respectively and fixedly connected with a first fixed rod 24, the surfaces of the plurality of movable sleeves 15 are respectively and respectively provided with a second sliding chute 25 matched with the first fixed rod 24 for use, when the flow in the pipeline is large, the movable sleeves 15 are pushed to move by the fluidity of petroleum, when the movable sleeves 15 move, the scraping blades 23 are pushed to rotate on the inner walls of the first pipeline 1 and the second pipeline 2 by the aid of the second sliding chutes 25 on the surfaces of the movable sleeves through the two first fixed rods 24, so that residual petroleum on the inner walls of the pipelines is scraped, and the pipelines are prevented from being blocked, the practicability of the pipeline is increased.

The left side and the right side of the second taper toothed rings 42 are fixedly connected with limit sliding blocks 21, the interiors of the first pipeline 1 and the second pipeline 2 are respectively provided with a first sliding chute 22 matched with the limit sliding blocks 21 for use, the interiors of the upper ends of the first pipeline 1 and the second pipeline 2 are respectively and rotatably connected with first rotating rods 26, the exteriors of the two first rotating rods 26 are respectively and uniformly fixedly sleeved with a plurality of first bevel gears 27 meshed with the second taper toothed rings 42, the upper ends of the sides of the first pipeline 1 and the second pipeline 2, which are far away from each other, are respectively provided with a movable groove 28, the ends of the two first rotating rods 26, which are far away from each other, respectively extend to the interiors of the movable grooves 28 and are fixedly sleeved with second bevel gears 29, and the upper ends of the sides of the first pipeline 1 and the second pipeline 2, which are far away from each other, are respectively and rotatably connected with second rotating rods 30, the lower extreme of two second dwang 30 all extends to the inside of movable groove 28 and fixedly connected with and the third bevel gear 31 of second bevel gear 29 meshing, the upper end of two second dwang 30 extends to the outside and the fixedly connected with knob 32 of first pipeline 1 and second pipeline 2 respectively, the setting of knob 32, can be when the pipeline internal flow is less, rotate third bevel gear 31 through knob 32, meshing promotion second taper ring 42 through between the gear rotates, drive doctor-bar 23 at the pipeline internal rotation through second taper ring 42, thereby realize scraping off pipeline inner wall residue, guarantee the normal use of pipeline under the different states, the practicality of pipeline has further been increased.

The lower end of one of the connecting cover 8 is provided with a through hole 40, the lower end of the through hole 40 is communicated with a U-shaped pipe 33, the right inner wall of the U-shaped pipe 33 is symmetrically and fixedly connected with a limiting block 34, the upper end of the limiting block 34 is movably connected with a buoyancy plate 35, the top end of the right inner wall of the U-shaped pipe 33 is fixedly connected with an induction switch 38, an alarm 39 matched with the induction switch 38 for use is installed at the lower end of the second pipeline 2, the upper end of the buoyancy plate 35 is fixedly connected with a second fixing rod 36, the upper end of the second fixing rod 36 is fixedly connected with a contact block 37 matched with the induction switch 38 for use, the alarm 39 and the buoyancy plate 35 are arranged, when leakage occurs at a pipeline joint, the contact block 37 is pushed to move upwards by using the buoyancy of petroleum, when the contact block 37 is contacted with the induction switch 38, the alarm 39 is directly opened, so that an overhaul personnel can timely overhaul the leakage, and the overall practicability of the pipeline is increased.

The working principle is as follows: when the pipeline is used, the connecting ring 3 on the left side of the second pipeline 2 can be firstly stretched into the first groove 4 on the right side of the first pipeline 1, the sealing ring 5 is sleeved outside the first sealing gasket 6, so that the two connecting covers 8 are mutually abutted, at the moment, a plurality of screw rods 10 can sequentially penetrate through the two connecting covers 8 and sequentially screw the nuts 11, so that the first pipeline 1 and the second pipeline 2 are connected, and the arrangement of the plurality of screw rods 10 can increase the bearing capacity of the joint of the two pipelines and increase the connection stability of the two pipelines; when the joint of the two pipelines leaks, oil flows into the U-shaped pipe 33 through the through hole 40, the buoyancy plate 35 pushes the second fixing rod 36 to move upwards by utilizing the buoyancy of the oil when the liquid level of the oil rises, the abutting block 37 is pushed to move upwards by the second fixing rod 36, when the abutting block 37 abuts against the inductive switch 38, the inductive switch 38 opens the alarm 39 through a wire, and the alarm 39 gives an alarm to prompt a worker to overhaul in time; when the pipeline is in normal use, oil is input from the left side of the first pipeline 1, when the flow rate in the pipeline is large, the oil pushes the plurality of resistance pieces 17 to move towards the right side when flowing towards the right side, the resistance pieces 17 push the limit slide block 21 and push the movable sleeve 15 to move outside the fixed sleeve 14 when moving, meanwhile, due to the action of the positioning block 18 and the positioning groove 19, the resistance pieces 17 and the movable sleeve 15 move in a horizontal movement mode, when the movable sleeve 15 moves towards the right side, the two first fixing rods 24 always slide on the inner wall of the first rotating rod 26 on the surface of the movable sleeve 15, the two first fixing rods 24 push the two scraping blades 23 to rotate inside the first pipeline 1 and the second pipeline 2 when sliding, so that oil residues on the inner walls of the first pipeline 1 and the second pipeline 2 are automatically scraped during oil conveying, when the flow rate in the pipeline is small, the second rotating rod 30 can be rotated through the second bevel knob 32, the third bevel gear 31 can be rotated through the meshing action of the third bevel gear 31 and the gear 29, the first rotating rod 27 can be driven to rotate through the second bevel gear 27, the multiple bevel gears 42, the multiple bevel gears can be reasonably meshed with the inner wall of the first pipeline, and the multiple bevel gears 42, so that the scraping blades can be reasonably matched with the internal bevel gear structure of the pipeline 2, and the pipeline can be reasonably designed, and the pipeline.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The use method of the anti-freezing oil conveying pipe with the cleaning mechanism comprises a first pipeline (1), and is characterized in that a second pipeline (2) is movably connected to the right side of the first pipeline (1), a connecting ring (3) is fixedly connected to the left end of the second pipeline (2), a first groove (4) matched with the connecting ring (3) for use is formed in the right side of the first pipeline (1), a sealing ring (5) is fixedly sleeved outside the left side of the second pipeline (2), the sealing ring (5) is arranged outside the connecting ring (3) and forms a groove with the connecting ring (3), a first sealing gasket (6) matched with the sealing ring (5) for use is fixedly sleeved outside the first pipeline (1), a fixed lantern ring (7) is fixedly sleeved outside one side, opposite to the first pipeline (1) and the second pipeline (2), connecting covers (8) are fixedly sleeved outside the two fixed lantern rings (7), one ends, opposite to the two connecting covers (8), are fixedly connected with a second sealing gasket (9), a plurality of screws (10) are connected between the two connecting covers (8) through threads, and a plurality of screws (10) are connected with a plurality of external screws (11) in a common mode;

the left side and the right side of the inner wall of the first pipeline (1) and the second pipeline (2) are fixedly connected with fixing plates (12), connecting rods (13) are fixedly connected between the two groups of fixing plates (12), the outer parts of the two connecting rods (13) are respectively and uniformly and fixedly sleeved with a plurality of fixing sleeves (14), the outer parts of the fixing sleeves (14) are respectively and movably sleeved with movable sleeves (15), and the outer parts of the right sides of the fixing sleeves (14) are respectively and fixedly sleeved with annular stoppers (16) matched with the movable sleeves (15);

the left sides of the movable sleeves (15) are fixedly connected with resistance pieces (17), the resistance pieces (17) are movably sleeved outside the connecting rod (13), positioning blocks (18) are fixedly connected inside the resistance pieces (17), a plurality of positioning grooves (19) matched with the positioning blocks (18) for use are uniformly formed in the upper end of the connecting rod (13), springs (20) matched with the resistance pieces (17) for use are arranged inside the movable sleeves (15), and the springs (20) are arranged on the left sides of the fixed sleeves (14);

a plurality of second grooves (41) are respectively and uniformly formed in the inner walls of the first pipeline (1) and the second pipeline (2), a second conical ring gear (42) is rotatably connected to the inner parts of the second grooves (41), scraping sheets (23) are fixedly connected to the upper end and the lower end of the inner wall of the second conical ring gear (42), a first fixing rod (24) is fixedly connected to one opposite side of each scraping sheet (23), and second sliding grooves (25) matched with the first fixing rod (24) are formed in the surfaces of the movable sleeves (15);

the left side and the right side of each second conical gear ring (42) are fixedly connected with a limiting slide block (21), first sliding grooves (22) matched with the limiting slide blocks (21) for use are formed in the first pipeline (1) and the second pipeline (2), first rotating rods (26) are rotatably connected in the upper ends of the first pipeline (1) and the second pipeline (2), and a plurality of first conical gears (27) meshed with the second conical gear rings (42) are respectively and uniformly fixedly sleeved outside the two first rotating rods (26);

the upper ends of the sides, far away from each other, of the first pipeline (1) and the second pipeline (2) are respectively provided with a movable groove (28), one ends, far away from each other, of the two first rotating rods (26) respectively extend to the inside of the movable grooves (28) and are fixedly sleeved with second bevel gears (29);

the upper ends of the sides, away from each other, of the first pipeline (1) and the second pipeline (2) are rotatably connected with second rotating rods (30), the lower ends of the two second rotating rods (30) extend into the movable groove (28) and are fixedly connected with third bevel gears (31) meshed with the second bevel gears (29), and the upper ends of the two second rotating rods (30) extend to the outer parts of the first pipeline (1) and the second pipeline (2) respectively and are fixedly connected with knobs (32);

a through hole (40) is formed in the lower end of one of the connecting covers (8), the lower end of the through hole (40) is communicated with a U-shaped pipe (33), limiting blocks (34) are symmetrically and fixedly connected to the inner wall of the right side of the U-shaped pipe (33), and the upper end of each limiting block (34) is movably connected with a buoyancy plate (35);

an induction switch (38) is fixedly connected to the top end of the inner wall of the right side of the U-shaped pipe (33), an alarm (39) matched with the induction switch (38) for use is installed at the lower end of the second pipeline (2), a second fixing rod (36) is fixedly connected to the upper end of the buoyancy plate (35), and a touch block (37) matched with the induction switch (38) for use is fixedly connected to the upper end of the second fixing rod (36);

when the sealing device is used, the connecting ring (3) on the left side of the second pipeline (2) extends into the first groove (4) on the right side of the first pipeline (1), the sealing ring (5) is sleeved outside the first sealing gasket (6), so that the two connecting covers (8) are mutually abutted, at the moment, the plurality of screw rods (10) sequentially penetrate through the two connecting covers (8), and the nuts (11) are sequentially screwed, so that the first pipeline (1) and the second pipeline (2) are connected, the arrangement of the plurality of screw rods (10) increases the bearing capacity of the joint of the two pipelines, and the connection stability of the two pipelines is increased; when the joint of the two pipelines leaks, oil flows into the U-shaped pipe (33) through the through hole (40), the buoyancy plate (35) pushes the second fixing rod (36) to move upwards by utilizing the buoyancy of the oil when the liquid level of the oil rises, the abutting block (37) is pushed to move upwards through the second fixing rod (36), when the abutting block (37) abuts against the inductive switch (38), the inductive switch (38) opens the alarm (39) through a wire, and the alarm (39) gives an alarm to prompt a worker to overhaul in time; when the pipeline is in normal use, oil is input from the left side of a first pipeline (1), when the flow in the pipeline is large, the oil pushes a plurality of resistance sheets (17) to move towards the right side when flowing towards the right side, the resistance sheets (17) push a limit slide block (21) and push a movable sleeve (15) to move outside a fixed sleeve (14) when moving, meanwhile, due to the effects of a positioning block (18) and a positioning groove (19), the resistance sheets (17) and the movable sleeve (15) move in a translation manner, when the movable sleeve (15) moves towards the right side, two first fixing rods (24) always slide on the inner wall of a first rotating rod (26) on the surface of the movable sleeve (15), when the two first fixing rods (24) slide, the two scraping blades (23) are pushed to rotate inside the first pipeline (1) and a second pipeline (2), so that the residues on the inner walls of the first pipeline (1) and the second pipeline (2) are automatically scraped off when the rotating rod conveys the oil, when the flow in the pipeline is small, a second knob (32) rotates, a second bevel gear (30) drives a plurality of bevel gears (27) to be meshed with a plurality of first bevel gears (27), when the rotating rod (29) rotates, the third bevel gear (27) and a plurality of bevel gears (31) are meshed with a plurality of bevel gears (27) through a plurality of bevel gears (31) and a plurality of bevel gears (31) respectively, when the bevel gears (31) and a plurality of bevel gears (27) rotates, thereby drive a plurality of second taper ring gears (42) and rotate in the inside of second recess (41), can drive a plurality of doctor-bars (23) through second taper ring gear (42) and rotate in the inside of second pipeline (2) and first pipeline (1), thereby carry out manual scraping to the residue on the pipeline inner wall.