A steerable double-layer protective high-pressure oil pipe

Abstract

The present invention provides a steerable double-layer protective high-pressure oil pipe, which relates to the technical field of high-pressure oil pipe protection. It includes an outer pipe, an inner pipe is arranged inside the outer pipe, and there is a gap between the inner pipe and the outer pipe. A detection component is arranged at the gap between the inner pipe and the branch pipe. The detection component includes a sealing ring. The sealing rings are fixedly arranged on the outer wall of the inner pipe and the inner wall of the outer pipe at equal intervals. A moving ring is arranged between two groups of the sealing rings. The moving ring slides along the outer wall of the inner pipe and the inner wall of the outer pipe. Connection ends are installed at the top and bottom of the outer pipe, and locking ends are installed inside the connection ends. Compared with the prior art, the detection component stratifies between the inner pipe and the outer pipe, and uses the moving plate to detect oil leakage for each section of distance, which can improve the detection sensitivity. When an oil leakage occurs, the transmission component will close the valve plate through the kinetic energy transmitted by the moving plate, isolate the connection between the oil pipe and the outside world, and suspend the oil delivery to avoid more leakage or explosion.

Description

Technical Field

[0001] The present invention relates to the technical field of high-pressure oil pipe protection, and particularly to a steerable double-layer protective high-pressure oil pipe. Background Art

[0002] The high-pressure oil pipe is a component of the high-pressure oil circuit. It is required that the oil pipe can withstand a certain oil pressure and has a certain fatigue strength to ensure the sealing requirements of the pipeline. The vehicle high-pressure oil pipe mainly appears in high-pressure injection diesel engines and direct injection gasoline engines with high-pressure injection, and can withstand the oil pressure required during the operation of the engine. The existing high-pressure oil pipes have a relatively wide range of applications. Once the high-pressure oil pipe ruptures, fuel will splash, which cannot guarantee the personal and property safety during the use process.

[0003] In the prior art, a set of protective pipes is often added outside the oil pipe to enhance the anti-leakage and protection capabilities of the oil pipe. Some protective pipes can also play the role of oil return. However, in this technology, when the oil pipe leaks, the oil will enter between the outer pipe and the inner pipe, and the leakage situation cannot be well known in the first time, and the protective measures for timely closing the oil pipe delivery to reduce oil leakage are relatively poor. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a steerable double-layer protective high-pressure oil pipe to solve the problems raised in the above background art. The structure of the present invention is novel. The detection component divides the space between the inner pipe and the outer pipe into layers, and uses the moving plate to detect oil leakage for each section of distance, which can improve the detection sensitivity. When an oil leakage occurs, the transmission component will close the valve plate through the kinetic energy transmitted by the moving plate, isolate the connection between the oil pipe and the outside, and suspend the oil delivery, so as to avoid more leakage or explosion.

[0005] To achieve the above object, the present invention is realized by the following technical solutions: A steerable double-layer protective high-pressure oil pipe, including an outer pipe, an inner pipe is provided inside the outer pipe, and there is a gap between the inner pipe and the outer pipe. A detection assembly is provided in the gap between the inner pipe and the branch pipe. The detection assembly includes a sealing ring. The sealing rings are equidistantly fixed on the outer wall of the inner pipe and the inner wall of the outer pipe. A moving ring is provided between two groups of the sealing rings. The moving ring slides along the outer wall of the inner pipe and the inner wall of the outer pipe. Connection ends are installed at the top and bottom of the outer pipe, and a locking end is installed inside the connection end. One end of the locking end is provided with a threaded ring, and the threaded ring is threadedly connected to the inner wall of the connection end. Both ends of the inner pipe pass through the locking end. A rotating ring is rotatably installed on the surface of the connection end at the lower end of the inner pipe, and branch pipes are provided on the outer side of the rotating ring. The branch pipes are communicated with the inner pipe. A transmission assembly is provided on the outer surface of the outer pipe. The transmission assembly includes a shaft rod. The shaft rod is rotatably installed on the outer wall of the outer pipe through a bearing seat. Valve plates are rotatably installed inside the two ends of the inner pipe. Both ends of the shaft rod are drivingly connected to the valve plates. A pressure sensor is installed on the inner wall of the inner pipe.

[0006] Further, the detection assembly further includes guide rods. Two guide rods are fixed between two groups of the sealing rings. The guide rods are arc-shaped around the gap between the inner pipe and the outer pipe. The moving ring is slidably sleeved on the two guide rods.

[0007] Further, a rubber strip is fixed on the outer side of the sealing ring, and four groups of cover plates are rotatably installed equidistantly on the inner side of the sealing ring. The cover plates of adjacent sealing rings are fixedly connected, and the moving ring is slidably sleeved on the surface of the cover plates.

[0008] Further, shaft rings are rotatably installed at both ends of the outer pipe. Connection plates are fixed to both ends of the cover plates passing through the sealing rings, and the connection plates are fixedly connected to the shaft rings.

[0009] Further, the transmission assembly further includes transmission gears. Transmission gears are fixed to both ends of the shaft rod. External teeth are provided on the outer side of the shaft ring, and the external teeth of the shaft ring are meshed with the transmission gears.

[0010] Further, both ends of the shaft rod penetrate into the connection end and are fixed with driving bevel gears. Transmission grooves are provided on the inner wall of the connection end corresponding to the driving bevel gears, and one end of the valve stem of the valve plate penetrates into the transmission groove and is fixed with a driven bevel gear. The driving bevel gear is meshed with the driven bevel gear.

[0011] Further, two blocks are symmetrically and slidably installed on the outer side of the shaft ring, and fixing screws are inserted at the outer ends of the blocks. The fixing screws are locked and inserted on the connection end.

[0012] Furthermore, a slot is provided inside the rotating ring, and a rotating ring is rotatably inserted inside the slot. A connecting port is provided on the surface of the rotating ring, and the connecting port is connected to the branch pipe and the inner pipe.

[0013] Furthermore, an inner gear ring is fixed on the inner wall of the outer end of the rotating ring, and the inner gear ring is meshedly connected with the transmission gear at the lower end of the shaft rod.

[0014] Furthermore, the guide rod is an arc sliding rod, and the guide rod is installed between the outer tube and the inner tube.

[0015] Beneficial effects of the present invention:

[0016] 1. The present invention can conveniently adjust the angle of the rotating ring through the setting of the rotating ring, and is also convenient for subsequent maintenance. Under normal conditions, the connecting port of the rotating ring is connected with the branch pipe and the inner pipe. When the inner pipe leaks and the leakage is too much, the shaft drives the transmission gear at the lower end to rotate and engage with the inner gear ring, driving the rotating ring to rotate along the slot, staggering the connection position of the connecting port with the inner pipe and the branch pipe, thereby cutting off the connection and transportation between the inner pipe and the branch pipe.

[0017] 2. The shaft collar of the present invention is fixedly connected to the connecting end by a clamping block and a fixing screw, and the clamping block is slidably clamped on the outer side of the shaft collar. When the shaft collar is rotated by the cover plate, the position of the clamping block remains unchanged, connecting and fixing the outer tube and the connecting end.

[0018] 3. The present invention causes the outer teeth to mesh with the transmission gear at the upper end of the shaft rod by rotating the shaft ring, thereby driving the active bevel gear and the driven bevel gear in the transmission groove to mesh and transmit, so that the valve plates at the pipe openings at both ends of the inner tube are closed. The closure of the inner tube does not mean that it is closed immediately as soon as oil leakage occurs, which is easy to affect the normal use of the oil pipe. When the oil leakage is small and is not enough to support the moving plate to move to the sealing ring positions on both sides, the angle rotated by the shaft rod and the transmission gear will not allow the valve plate to completely close the pipe opening. At this time, it is only necessary to make timely maintenance or adjustments when a leakage is detected by the pressure sensor inside the inner tube. When the leakage is serious, when the moving ring moves to any position of the sealing rings at both ends, the valve plate is rotated to a horizontal state through the driving force after the transmission to completely close the pipe opening, and the oil pipe is cut off from continuing to transport oil to avoid the risk of bursting.

[0019] 4. The present invention uses the cover plate to provide temporary protection. If the leakage cannot be blocked by the cover plate, the movable ring will continue to slide along the guide rod until it moves to the vicinity of the sealing ring. At this time, the transmission assembly will quickly close both ends of the inner tube to block part of the oil pipe to prevent further leakage. By dividing the space evenly by multiple sealing rings, the detection sensitivity can be improved, allowing the movable ring to respond quickly.

[0020] 5. Compared with the prior art, the detection component stratifies the inner tube and the outer tube, and uses the moving plate to detect oil leakage for each section of distance, which can improve the detection sensitivity. When oil leakage occurs, the transmission component will close the valve plate through the kinetic energy transmitted by the moving plate, isolate the oil pipe from the outside, suspend the oil delivery, and avoid more leakage or explosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the overall structural schematic diagram of a steerable double-layer protected high-pressure oil pipe of the present invention;

[0022] Figure 2 is the internal structural schematic diagram of the outer tube of a steerable double-layer protected high-pressure oil pipe of the present invention;

[0023] Figure 3 is the separation schematic diagram of the connection end and the locking end of a steerable double-layer protected high-pressure oil pipe of the present invention;

[0024] Figure 4 is the bottom structural schematic diagram of the transmission component of a steerable double-layer protected high-pressure oil pipe of the present invention;

[0025] Figure 5 is the separation schematic diagram of the rotating ring and the swivel ring of a steerable double-layer protected high-pressure oil pipe of the present invention;

[0026] Figure 6 is the top structural schematic diagram of the transmission component of a steerable double-layer protected high-pressure oil pipe of the present invention;

[0027] Figure 7 is the connection schematic diagram of the driving bevel gear and the driven bevel gear of a steerable double-layer protected high-pressure oil pipe of the present invention;

[0028] Figure 8 is the internal structural schematic diagram of the inner tube of a steerable double-layer protected high-pressure oil pipe of the present invention;

[0029] Figure 9 is the connection schematic diagram of the detection component and the collar of a steerable double-layer protected high-pressure oil pipe of the present invention;

[0030] Figure 10 is the structural schematic diagram of the detection component of a steerable double-layer protected high-pressure oil pipe of the present invention.

[0031] In the figure: 1. Outer tube; 2. Connection end; 21. Locking end; 22. Threaded ring; 3. Inner tube; 31. Valve plate; 4. Transmission assembly; 41. Shaft rod; 42. Transmission gear; 43. Rotating ring; 44. Internal gear ring; 45. Shaft collar; 451. Block; 46. Fixing screw; 47. Transmission groove; 48. Driving bevel gear; 49. Driven bevel gear; 5. Branch pipe; 51. Rotating ring; 52. Connection port; 53. Slot; 6. Detection assembly; 61. Sealing ring; 62. Rubber strip; 63. Cover plate; 64. Guide rod; 65. Moving ring; 66. Connection plate. Detailed implementation mode

[0032] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with the specific implementation modes.

[0033] Please refer to Figures 1 to 10 , the present invention provides a technical solution: a steerable double-layer protective high-pressure oil pipe, including an outer tube 1, characterized in that: an inner tube 3 is arranged inside the outer tube 1, and there is a gap between the inner tube 3 and the outer tube 1, and a detection assembly 6 is arranged in the gap between the inner tube 3 and the branch pipe 5. The detection assembly 6 includes a sealing ring 61, and the sealing rings 61 are equidistantly fixed on the outer wall of the inner tube 3 and the inner wall of the outer tube 1. A moving ring 65 is arranged between the two groups of sealing rings 61, and the moving ring 65 slides along the outer wall of the inner tube 3 and the inner wall of the outer tube 1. Connection ends 2 are installed at the top and bottom of the outer tube 1, and a locking end 21 is installed inside the connection end 2. One end of the locking end 21 is provided with a threaded ring 22, and the threaded ring 22 is threadedly connected to the inner wall of the connection end 2. Both ends of the inner tube 3 pass through the locking end 21. A rotating ring 51 is rotatably installed on the surface of the connection end 2 at the lower end of the inner tube 3, and a branch pipe 5 is arranged on the outer side of the rotating ring 51. The branch pipe 5 is communicated with the inner tube 3. A transmission assembly 4 is arranged on the outer surface of the outer tube 1. The transmission assembly 4 includes a shaft rod 41, and the shaft rod 41 is rotatably installed on the outer wall of the outer tube 1 through a bearing seat. Valve plates 31 are rotatably installed inside the two ends of the inner tube 3, and both ends of the shaft rod 41 are drivingly connected to the valve plates 31. A pressure sensor is installed on the inner wall of the inner tube 3. When using the device, the outer tube 1 is installed outside the inner tube 3, and both ends of the outer tube 1 are installed through the threaded connection of the connection end 2 and the locking end 21. When the inner tube 3 leaks, the oil will enter between the two sealing rings 61 in the gap between the inner tube 3 and the outer tube 1, and the moving ring 65 is pushed to move by the pressure. The transmission assembly 4 transmits the kinetic energy when the moving ring 65 moves. When the leakage is excessive, the two ends of the inner tube 3 are closed in time to stop the continuous transmission of oil, avoiding further leakage and causing danger.

[0034] In this embodiment, the detection component 6 further includes guide rods 64. Two guide rods 64 are fixed between the two sealing rings 61. The guide rods 64 are arranged in an arc shape around the gap between the inner pipe 3 and the outer pipe 1. The moving ring 65 is slidably sleeved on the two guide rods 64. A rubber strip 62 is fixed to the outer side of the sealing ring 61, and four groups of cover plates 63 are rotatably installed at equal intervals on the inner side of the sealing ring 61. The cover plates 63 of adjacent sealing rings 61 are fixedly connected, and the moving ring 65 is slidably sleeved on the surface of the cover plates 63. The guide rods 64 are arc-shaped sliding rods, and the guide rods 64 are installed between the outer pipe 1 and the inner pipe 3. (The guide rods 64 are spiral arc-shaped sliding rods. When the moving ring 65 moves along the surface of the guide rods 64, it will rotate along with its arc. Simply put, when the moving ring 65 moves from the bottom to the top of one guide rod 64, the moving ring 65 just rotates ninety degrees.) The guide rods 64 are arranged in an inclined arc shape around the outer side of the inner pipe 3. In the initial state, the moving ring 65 is in the middle position. Any leakage between the two sealing rings 61 will push the moving ring 65 to move to one side. When the moving ring 65 moves, it will rotate slightly along the direction of the guide rods 64, driving the cover plates 63 to rotate synchronously. The cover plates 63 will cover and block the surface of the inner pipe 3. If the leakage position is covered by the cover plates 63 and the leakage is reduced or does not continue, the leakage part can be repaired by the maintenance of technical workers. The cover plates 63 play a temporary protection effect. If the leakage situation cannot be blocked by the cover plates 63, the moving ring 65 will continue to slide along the guide rods 64 until it moves near the sealing ring 61. At this time, the transmission component 4 will quickly close both ends of the inner pipe 3 to block this part of the oil pipe and prevent further leakage. Dividing the space at equal intervals by multiple sealing rings 61 can improve the detection sensitivity, enabling the moving ring 65 to respond quickly.

[0035] In this embodiment, collar 45 is rotatably installed at both ends of the outer pipe 1. At both ends of the cover plate 63, connecting plates 66 are fixed through the sealing ring 61, and the connecting plates 66 are fixedly connected to the collar 45. The transmission assembly 4 further includes transmission gears 42. Transmission gears 42 are fixed at both ends of the shaft rod 41. External teeth are provided on the outer side of the collar 45, and the external teeth of the collar 45 are meshed with the transmission gears 42. Both ends of the shaft rod 41 penetrate into the connection end 2 and are fixed with driving bevel gears 48. A transmission groove 47 is formed in the inner wall of the connection end 2 corresponding to the position of the driving bevel gear 48. One end of the valve rod of the valve plate 31 penetrates into the transmission groove 47 and is fixed with a driven bevel gear 49. The driving bevel gear 48 is meshed with the driven bevel gear 49. Two blocks 451 are symmetrically and slidably installed on the outer side of the collar 45, and fixing screws 46 are inserted into the outer ends of the blocks 451. The fixing screws 46 are locked and inserted on the connection end 2. The collar 45 is fixedly connected to the connection end 2 through the blocks 451 and the fixing screws 46, and the blocks 451 are slidably clamped on the outer side of the collar 45. When the collar 45 rotates driven by the cover plate 63, the positions of the blocks 451 remain unchanged, connecting and fixing the outer pipe 1 and the connection end 2. The rotation of the collar 45 causes the external teeth to be meshed with the transmission gear 42 at the upper end of the shaft rod 41, thereby driving the meshing transmission of the driving bevel gear 48 and the driven bevel gear 49 in the transmission groove 47, so that the valve plates 31 at both ends of the inner pipe 3 are closed. The closing of the inner pipe 3 does not occur immediately as long as oil leakage occurs. This is likely to affect the normal use of the oil pipe. When the amount of oil leakage is small and insufficient to support the moving plate to move to the positions of the two sealing rings 61, at this time, the rotation angle of the shaft rod 41 and the transmission gear 42 will not completely close the valve plate 31 at the pipe orifice. At this time, it is only necessary to make timely repairs or adjustments under the detection of the pressure sensor inside the inner pipe 3 when a leakage situation is known. When the leakage situation is serious, when the moving ring 65 moves to any position of the two sealing rings 61, at this time, the valve plate 31 rotates to a horizontal state to completely close the pipe orifice under the driving force after transmission, cutting off the oil pipe from continuing to transport oil and avoiding the danger of explosion.

[0036] In this embodiment, a slot 53 is provided inside the rotating ring 51, and a rotating ring 43 is rotatably inserted inside the slot 53. A connecting port 52 is provided on the surface of the rotating ring 43, and the connecting port 52 connects the branch pipe 5 and the inner pipe 3. An inner gear ring 44 is fixed on the inner wall of the outer end of the rotating ring 43, and the inner gear ring 44 is meshed and connected with the transmission gear 42 at the lower end of the shaft rod 41. The branch pipe 5 is a pipe opening for connecting to pipelines in other directions. Through the provision of the rotating ring 51, its angle can be conveniently adjusted, and subsequent maintenance is also convenient. Under normal conditions, the connecting port 52 of the rotating ring 43 is connected with the branch pipe 5 and the inner pipe 3. When the inner pipe 3 leaks and the leakage is too much, the shaft rod 41 drives the transmission gear 42 at the lower end to rotate and mesh with the inner gear ring 44, driving the rotating ring 43 to rotate along the slot 53, staggering the connecting position of the connecting port 52 with the inner pipe 3 and the branch pipe 5, thereby cutting off the connection and transportation between the inner pipe 3 and the branch pipe 5.

[0037] When the device is used, the outer tube 1 is installed on the outside of the inner tube 3, and the two ends of the outer tube 1 are installed by threaded connection of the connecting end 2 and the locking end 21. The branch tube 5 is a pipe opening for connecting to pipes in other directions. By setting the rotating ring 51, its angle can be easily adjusted, which is also convenient for subsequent maintenance. Under normal conditions, the connecting port 52 of the rotating ring 43 is connected with the branch tube 5 and the inner tube 3. When the inner tube 3 leaks and the leakage is too much, the shaft 41 drives the transmission gear 42 at the lower end to rotate and mesh with the inner gear ring 44, driving the rotating ring 43 to rotate along the slot 53, staggering the connecting position of the connecting port 52 with the inner tube 3 and the branch tube 5, thereby cutting off the connection between the inner tube 3 and the branch tube 5 In the initial state, the movable ring 65 is in the middle position. If leakage occurs at any position between the two sealing rings 61, the movable ring 65 will be pushed to one side. When the movable ring 65 moves, it will rotate slightly along the direction of the guide rod 64, driving the cover plate 63 to rotate synchronously. The cover plate 63 will cover and block the surface of the inner tube 3. If the leakage position is blocked by the cover plate 63, the leakage is reduced or does not continue to leak, and the leaking part can be repaired by a skilled worker. The cover plate 63 plays a temporary protective role. If the leakage cannot be blocked by the cover plate 63, the movable ring 65 will continue to slide along the guide rod 64 until it moves to the sealing The ring 61 is near, at this time, the transmission component 4 will quickly close the two ends of the inner tube 3, blocking the part of the oil pipe to prevent further leakage. The space can be divided equally by multiple sealing rings 61 to improve the detection sensitivity, so that the mobile ring 65 can react quickly. When the shaft ring 45 is driven by the cover plate 63 to rotate, the block 451 remains in the same position, connecting the fixed outer tube 1 and the connecting end 2. The shaft ring 45 rotates so that the external teeth are engaged with the transmission gear 42 at the upper end of the shaft rod 41, thereby driving the active bevel gear 48 and the driven bevel gear 49 in the transmission groove 47 to engage and transmit, so that the valve plates 31 at the two ends of the inner tube 3 are closed, and the closure of the inner tube 3 is not As soon as oil leakage occurs, it is immediately closed, which can easily affect the normal use of the oil pipe. When the amount of oil leakage is small and not enough to support the movable plate to move to the position of the sealing rings 61 on both sides, the angle of rotation of the shaft 41 and the transmission gear 42 will not allow the valve plate 31 to completely close the pipe mouth. At this time, it is only necessary to make timely repairs or adjustments when a leakage is detected by the pressure sensor inside the inner tube 3. When the leakage is serious, when the movable ring 65 moves to any position of the sealing rings 61 at both ends, the valve plate 31 is rotated to a horizontal state through the driving force after transmission to completely close the pipe mouth, cut off the oil pipe from continuing to transport oil, and avoid the risk of explosion.

[0038] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention.

[0039] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A steerable double-layer protective high-pressure oil pipe, comprising an outer pipe (1), characterized in that: Inside the outer tube (1), there is an inner tube (3), and there is a gap between the inner tube (3) and the outer tube (1). A detection component (6) is provided in the gap between the inner tube (3) and the branch tube (5). The detection component (6) includes a sealing ring (61). The sealing rings (61) are fixedly arranged equidistantly on the outer wall of the inner tube (3) and the inner wall of the outer tube (1). A moving ring (65) is arranged between two groups of the sealing rings (61). The moving ring (65) slides along the outer wall of the inner tube (3) and the inner wall of the outer tube (1). Connection ends (2) are installed at the top and bottom of the outer tube (1), and a locking end (21) is installed inside the connection end (2). One end of the locking end (21) is provided with a threaded ring (22), and the threaded ring (22) is threadedly connected to the inner wall of the connection end (2). Both ends of the inner tube (3) pass through the locking end (21). A rotating ring (51) is rotatably installed on the surface of the connection end (2) at the lower end of the inner tube (3), and a branch tube (5) is arranged on the outer side of the rotating ring (51). The branch tube (5) is communicated with the inner tube (3). A transmission component (4) is arranged on the outer surface of the outer tube (1). The transmission component (4) includes a shaft rod (41). The shaft rod (41) is rotatably installed on the outer wall of the outer tube (1) through a bearing seat. Valve plates (31) are rotatably installed inside the two ends of the inner tube (3). Both ends of the shaft rod (41) are in transmission connection with the valve plates (31). A pressure sensor is installed on the inner wall of the inner tube (3). The detection component (6) further includes guide rods (64). Two guide rods (64) are fixed between two groups of the sealing rings (61). The guide rods (64) are arranged in an arc shape around the gap between the inner tube (3) and the outer tube (1). The moving ring (65) is slidably sleeved on the two guide rods (64).

2. The steerable double-layer protective high-pressure oil pipe according to claim 1, characterized in that: A rubber strip (62) is fixed on the outer side of the sealing ring (61), and four groups of cover plates (63) are rotatably installed equidistantly on the inner side of the sealing ring (61). The cover plates (63) of adjacent sealing rings (61) are fixedly connected, and the moving ring (65) is slidably sleeved on the surface of the cover plates (63).

3. The steerable double-layer protective high-pressure oil pipe according to claim 2, characterized in that: Shaft rings (45) are rotatably installed at both ends of the outer tube (1). Both ends of the cover plate (63) pass through the sealing ring (61) and are fixed with a connecting plate (66), and the connecting plate (66) is fixedly connected with the shaft ring (45).

4. A steerable double-layer protective high-pressure oil pipe according to claim 3, characterized in that: The transmission component (4) further includes transmission gears (42). Transmission gears (42) are fixed at both ends of the shaft rod (41). External teeth are arranged on the outer side of the shaft ring (45), and the external teeth of the shaft ring (45) are meshed with the transmission gears (42).

5. A steerable double-layer protective high-pressure oil pipe according to claim 4, characterized in that: Both ends of the shaft rod (41) penetrate into the connection end (2) and are fixed with a driving bevel gear (48). A transmission groove (47) is opened on the inner wall of the connection end (2) corresponding to the position of the driving bevel gear (48). One end of the valve rod of the valve plate (31) penetrates into the transmission groove (47) and is fixed with a driven bevel gear (49). The driving bevel gear (48) is meshed with the driven bevel gear (49).

6. The steerable double-layer protective high-pressure oil pipe according to claim 5, characterized in that: Two clamping blocks (451) are symmetrically and slidably installed on the outer side of the collar (45), and a fixing screw (46) is inserted into the outer end of the clamping block (451). The fixing screw (46) is locked and inserted on the connecting end (2).

7. A steerable double-layer protective high-pressure oil pipe according to claim 6, characterized in that: A slot (53) is formed inside the rotating ring (51), and a rotating ring (43) is rotatably inserted into the slot (53). A connection port (52) is formed on the surface of the rotating ring (43), and the connection port (52) communicates with the branch pipe (5) and the inner pipe (3).

8. A steerable double-layer protective high-pressure oil pipe according to claim 7, characterized in that: An internal gear ring (44) is fixed to the inner wall of the outer end of the rotating ring (43), and the internal gear ring (44) is meshed with the transmission gear (42) at the lower end of the shaft rod (41).

9. A steerable double-layer protective high-pressure oil pipe according to claim 1, characterized in that: The guide rod (64) is an arc-shaped sliding rod, and the guide rod (64) is installed between the outer pipe (1) and the inner pipe (3).

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