Seamless steel pipe for high-pressure oil pipe

Abstract

The utility model discloses a seamless steel pipe for a high-pressure oil pipe, which comprises a first seamless steel pipe, a second seamless steel pipe, a fixing mechanism and a connecting structure, the second seamless steel pipe is arranged at the front end of the first seamless steel pipe, and the fixing mechanism is arranged on the outer side of the first seamless steel pipe. According to the seamless steel pipe for the high-pressure oil pipe, the hose and the first circular pipe fixing assembly are fixed, and the hose and the first circular pipe fixing assembly are used for clamping the first seamless steel pipe, so that the strength of the bent position of the first seamless steel pipe on the side wall is enhanced; the service life of the high-pressure oil pipe is prolonged, and the cost of thickening the first seamless steel pipe for coping with the impact force of high-pressure oil is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of seamless steel pipes, in particular to a seamless steel pipe for high-pressure oil pipes. Background Art

[0002] The high-pressure oil pipe is a component of the high-pressure oil circuit, and the sealing and fatigue strength of the pipe need to be ensured. In the direct injection gasoline engine with high-pressure injection, the high-pressure oil pipe used is mainly a seamless steel pipe. However, since the high-pressure oil pipe will be subjected to very high pressure during transportation, the connection of the high-pressure oil pipe is easy to fall off, thus affecting the normal transportation. In serious cases, a fire may occur.

[0003] In the prior art, seamless steel pipes are connected by setting threads on the inner side of a first threaded steel pipe, setting a smaller steel pipe inside a second seamless steel pipe and setting threads on the outer side, and then connecting the pipe to the inner thread of the first threaded steel pipe. However, the radius of the internal pipe becomes smaller, resulting in a greater impact force at the connection. In addition, since the second seamless steel pipe is threadedly connected to the first seamless steel pipe, the first seamless steel pipe and the second seamless steel pipe need to rotate relative to each other, making disassembly and installation inconvenient.

[0004] Therefore, the utility model provides a seamless steel pipe for high-pressure oil pipe to solve the above problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a seamless steel pipe for high-pressure oil pipe, which solves the above problems.

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a seamless steel pipe for high-pressure oil pipe, comprising a first seamless steel pipe and a second seamless steel pipe, wherein the second seamless steel pipe is arranged at the front end of the first seamless steel pipe, and is characterized in that it also includes a fixing mechanism and a connecting structure, wherein the fixing mechanism is arranged on the outside of the first seamless steel pipe, and the connecting structure is arranged between the first seamless steel pipe and the second seamless steel pipe.

[0007] Preferably, the fixing mechanism comprises a first round tube fixing assembly, a hose is arranged on the outside of the first seamless steel tube, the first round tube fixing assembly is fixedly connected to the outside of the hose by bolts on both sides, and the two ends of the hose are fixedly connected to the second round tube fixing assembly by bolts.

[0008] Preferably, a thread is provided on the outer side of one end of the first seamless steel pipe, the pipe thickness of the first seamless steel pipe close to the second seamless steel pipe is 8 mm, and the pipe thickness inside the first seamless steel pipe is 10 mm.

[0009] Preferably, the connection structure includes a first threaded fixing ring, which is threadedly connected to a first seamless steel pipe, a first gasket is provided on the front side of the first threaded fixing ring, a threaded connecting round tube is provided on the front side of the first gasket, and a sealing ring is provided between the threaded connecting round tube and the first gasket.

[0010] Preferably, the connection structure also includes a threaded round tube, a connecting round rod is slidably connected to the inner side of the first seamless steel tube, the side end of the connecting round rod is tightly attached to the side end of the inner wall of the first seamless steel tube, one end of the inner side of the threaded round tube is threadedly connected to the outside of the first threaded fixing ring, the other end of the threaded round tube is threadedly connected to the outside of the connecting round rod, a thread is provided in the middle of the connecting round rod, the radius of the middle of the connecting round rod is 10 mm, and the radius on both sides of the connecting round rod is 8 mm.

[0011] Preferably, the connection structure also includes a threaded round tube and a second sealing ring, a second gasket is provided at the front end of the threaded round tube, a second threaded fixing ring is provided at the front end of the second gasket, the second threaded fixing ring is threadedly connected to the outside of the connecting round rod, and the second sealing ring is provided between the threaded round tube and the second gasket.

[0012] Beneficial Effects

[0013] The utility model provides a seamless steel pipe for high-pressure oil pipe. Compared with the prior art, it has the following beneficial effects:

[0014] (1) A seamless steel pipe for high-pressure oil pipe is fixed by a hose and a first round pipe fixing assembly. The hose and the first round pipe fixing assembly are used to support the first seamless steel pipe, thereby enhancing the strength of the first seamless steel pipe at the bending part of the side wall, improving the service life of the high-pressure oil pipe, and reducing the cost of thickening the first seamless steel pipe to cope with the impact force of the high-pressure oil.

[0015] (2) A seamless steel pipe for high-pressure oil pipe, wherein the two ends of a connecting round rod are movably connected to the inner sides of a first seamless steel pipe and a second seamless steel pipe respectively, and then the second seamless steel pipe is used to abut the connecting round rod, and the end of the connecting round rod away from the second seamless steel pipe is abutted against the inner side wall of the first seamless steel pipe, and then the first seamless steel pipe and the threaded connecting round pipe are fixed by a threaded connecting round pipe, and then the position of the threaded connecting round pipe is fixed by a first threaded fixing ring and a second sealing ring, thereby fixing the connecting round rod and the first seamless steel pipe, and cooperating with the first sealing ring and the second sealing ring to ensure the sealing of the high-pressure oil pipe.

[0016] (3) A seamless steel pipe for high-pressure oil pipe, which facilitates quick disassembly and installation of the first seamless steel pipe and the second seamless steel pipe by sequentially rotating a first threaded fixing ring, a second threaded fixing ring, a threaded connecting round pipe and components symmetrical thereto. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the overall internal structure diagram of the utility model;

[0018] Figure 2 It is a structural diagram of the fixing mechanism of the utility model;

[0019] Figure 3 This is a structural diagram of the second round tube fixing assembly of the utility model;

[0020] Figure 4 This is the internal structure diagram of the first seamless steel pipe of the utility model;

[0021] Figure 5 It is the overall external structure diagram of the utility model.

[0022] In the figure, 1 is a first seamless steel pipe; 2 is a second seamless steel pipe;

[0023] Fixing mechanism: 31, hose; 32, first round tube fixing assembly; 33, second round tube fixing assembly;

[0024] Connection structure: 41, first threaded fixing ring; 42, first gasket; 43, first sealing ring; 44, threaded connecting round tube; 45, second gasket; 46, second threaded fixing ring; 47, connecting round rod; 48, second sealing ring. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Embodiment 1:

[0027] See also Figure 1-5 A seamless steel pipe for high-pressure oil pipe includes a first seamless steel pipe 1 and a second seamless steel pipe 2, wherein the second seamless steel pipe 2 is arranged at the front end of the first seamless steel pipe 1, and also includes a fixing mechanism and a connecting structure, wherein the fixing mechanism is arranged on the outside of the first seamless steel pipe 1, and the connecting structure is arranged between the first seamless steel pipe 1 and the second seamless steel pipe 2.

[0028] The fixing mechanism includes a first round tube fixing assembly 32. A hose 31 is arranged outside the first seamless steel tube 1. The first round tube fixing assembly 32 is fixedly connected to the outside of the hose 31 by bolts on both sides. The two ends of the hose 31 are fixedly connected to the second round tube fixing assembly 33 by bolts.

[0029] A thread is arranged on the outer side of one end of the first seamless steel pipe 1. The pipe thickness of the first seamless steel pipe 1 near the second seamless steel pipe 2 is 8 mm, and the pipe thickness on the inner side of the first seamless steel pipe 1 is 10 mm.

[0030] The connection structure includes a first threaded fixing ring 41, which is threadedly connected to the first seamless steel pipe 1. A first gasket 42 is arranged on the front side of the first threaded fixing ring 41, a threaded connecting round tube 44 is arranged on the front side of the first gasket 42, and a sealing ring 43 is arranged between the threaded connecting round tube 44 and the first gasket 42.

[0031] The connection structure also includes a threaded circular tube 44, a connecting circular rod 47 is slidably connected to the inner side of the first seamless steel tube 1, and the side end of the connecting circular rod 47 is tightly attached to the side end of the inner wall of the first seamless steel tube 1. One end of the inner side of the threaded circular tube 44 is threadedly connected to the outer side of the first threaded fixing ring 41, and the other end of the threaded circular tube 44 is threadedly connected to the outer side of the connecting circular rod 47. A thread is arranged in the middle of the connecting circular rod 47. The radius of the middle of the connecting circular rod 47 is 10 mm, and the radius on both sides of the connecting circular rod 47 is 8 mm.

[0032] The connection structure also includes a threaded connection tube 44 and a second sealing ring 48. A second gasket 45 is provided at the front end of the threaded connection tube 44. A second threaded fixing ring 46 is provided at the front end of the second gasket 45. The second threaded fixing ring 46 is threadedly connected to the outside of the connecting round rod 47. The second sealing ring 48 is provided between the threaded connection tube 44 and the second gasket 45.

[0033] Working process:

[0034] After the long-term operation of the oil pipeline, the inner side wall of the bend of the first seamless steel pipe 1 is subjected to the impact force of the high-pressure oil on the inner side wall of the bend of the first seamless steel pipe 1 for a long time. A hose 31 is arranged on the first seamless steel pipe 1, and the first round tube fixing component 32 is fixed to the outside of the hose 31 by bolts. The hose 31 and the first round tube fixing component 32 are fixed, and the first seamless steel pipe 1 is supported by the material elasticity of the hose 31 itself and the material physical properties of the first round tube fixing component 32, and the second round tube fixing component 33 is used to further reinforce the first round tube fixing component 32.

[0035] Insert the connecting round rod 47 into the first seamless steel pipe 1, and the side end of the connecting round rod 47 is against the inner side wall of the first seamless steel pipe 1. Rotate the threaded connecting round tube 44 so that the threaded connecting round tube 44 is threadedly connected to the first seamless steel pipe 1, so that the threaded connecting round tube 44 reaches between the connecting round rod 47 and the first seamless steel pipe 1, rotate the second threaded fixing ring 46 and the first threaded fixing ring 41 respectively, and then fix the position of the threaded connecting round tube 44 by the first gasket 42 and the second gasket 45, and seal it by the first sealing ring 43 and the second sealing ring 48 to avoid pipeline leakage.

[0036] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A seamless steel pipe for high-pressure oil pipe, comprising a first seamless steel pipe (1) and a second seamless steel pipe (2), wherein the second seamless steel pipe (2) is arranged at the front end of the first seamless steel pipe (1), characterized in that: It also comprises a fixing mechanism and a connecting structure, wherein the fixing mechanism is arranged outside the first seamless steel pipe (1), and the connecting structure is arranged between the first seamless steel pipe (1) and the second seamless steel pipe (2).

2. The seamless steel pipe for high-pressure oil pipe according to claim 1, characterized in that: The fixing mechanism comprises a first round tube fixing assembly (32), a hose (31) is arranged outside the first seamless steel tube (1), the first round tube fixing assembly (32) is fixedly connected to the outside of the hose (31) by bolts on both sides, and the hose (31) is fixedly connected to the second round tube fixing assembly (33) at both ends by bolts.

3. The seamless steel pipe for high-pressure oil pipe according to claim 1, characterized in that: One end of the first seamless steel pipe (1) is provided with a thread on the outside, the thickness of the first seamless steel pipe (1) close to the second seamless steel pipe (2) is 8 mm, and the thickness of the inner side of the first seamless steel pipe (1) is 10 mm.

4. The seamless steel pipe for high-pressure oil pipe according to claim 1, characterized in that: The connection structure comprises a first threaded fixing ring (41), the first threaded fixing ring (41) being threadedly connected to a first seamless steel pipe (1), a first gasket (42) being arranged on the front side of the first threaded fixing ring (41), a threaded connection round tube (44) being arranged on the front side of the first gasket (42), and a sealing ring (43) being arranged between the threaded connection round tube (44) and the first gasket (42).

5. The seamless steel pipe for high-pressure oil pipe according to claim 4, characterized in that: The connection structure further comprises a threaded connection round tube (44), a connection round rod (47) being slidably connected to the inner side of the first seamless steel tube (1), the side end of the connection round rod (47) being in close contact with the side end of the inner wall of the first seamless steel tube (1), one end of the inner side of the threaded connection round tube (44) being threadedly connected to the outer side of the first threaded fixing ring (41), the other end of the threaded connection round tube (44) being threadedly connected to the outer side of the connection round rod (47), a thread being arranged in the middle of the connection round rod (47), the middle radius of the connection round rod (47) being 10 mm, and the radii of both sides of the connection round rod (47) being 8 mm.

6. The seamless steel pipe for high-pressure oil pipe according to claim 5, characterized in that: The connection structure further comprises a threaded connection round tube (44) and a second sealing ring (48); a second gasket (45) is provided at the front end of the threaded connection round tube (44); a second threaded fixing ring (46) is provided at the front end of the second gasket (45); the second threaded fixing ring (46) is threadedly connected to the outside of the connection round rod (47); and the second sealing ring (48) is provided between the threaded connection round tube (44) and the second gasket (45).

Images