Stainless steel lining oil pipe

Abstract

The utility model belongs to the technical field of petroleum machinery, and particularly relates to a stainless steel lining oil pipe which comprises a steel pipe base body, a detachable lining is installed in the steel pipe base body, the lining is provided with a stainless steel layer, the stainless steel layer is provided with a concave-convex supporting frame, a first round through hole is formed in the convex face of the stainless steel layer, and a first connecting piece is installed in the first round through hole. A base is arranged at the first end of the first connecting piece and matched with the edge of the convex face, a screw is arranged at the second end of the first connecting piece, a second connecting piece movably connected with the screw is arranged at the end of the screw, the second connecting piece is provided with a nut, a baffle is arranged on the top of the nut, and the lining is installed on the steel pipe base body through the first connecting piece and the second connecting piece. The lining is installed in the steel pipe base body through the first connecting piece and the second connecting piece, the lining cannot protrude out of the steel pipe base body, the phenomenon that the lining protrudes out of the steel pipe base body cannot be caused, and installation defects are avoided; the steel pipe base body and the lining are of a detachable structure and are convenient to replace.

Description

Technical Field

[0001] The utility model belongs to the technical field of petroleum machinery, and particularly relates to a stainless steel lined oil pipe. Background Art

[0002] The lined oil pipe is ingeniously designed. By seamlessly embedding a special polyethylene pipe inside a conventional oil pipe and using an exclusive patented technology to ensure the tight integration of these two layers of pipes, a unique "double-layer pipe" structure is formed. This innovative design significantly improves the wear resistance and corrosion resistance of the oil pipe.

[0003] However, there is a defect that cannot be ignored in the current market for such lined oil pipes: the sealing performance at the connection is not good, which makes the steel pipe matrix vulnerable to corrosion by acid, alkali and salt. At the same time, when the external environmental temperature changes, the surface temperature of the oil pipe is easily affected and rises sharply, thus causing a high-temperature oxidation problem. This high-temperature oxidation not only damages the material of the oil pipe, but also accelerates its aging process, ultimately limiting the service life of the oil pipe and reducing the overall service efficiency.

[0004] Therefore, a stainless steel lined oil pipe with corrosion resistance and tight sealing is needed. Content of the Utility Model

[0005] The purpose of the utility model is to provide a stainless steel lined oil pipe.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a stainless steel lined oil pipe, including a steel pipe matrix, in which a detachable lining is installed. The lining is provided with a stainless steel layer, and the stainless steel layer is provided with a concave-convex support frame. A first circular through hole is provided at the convex surface, and a first connecting piece is installed in the first circular through hole. A base is provided at the first end of the first connecting piece, and the base fits with the edge of the convex surface. A screw rod is provided at the second end of the first connecting piece, and a second connecting piece movably connected to the screw rod is provided at the end of the screw rod. The second connecting piece is provided with a nut, and a baffle is provided at the top of the nut. The lining is installed on the steel pipe matrix through the first connecting piece and the second connecting piece.

[0007] Specifically, the lining is further provided with an anti-corrosion layer and a corrosion-resistant layer.

[0008] Specifically, an external thread is provided on the outermost layer of the lining, and an internal thread is provided on the steel pipe matrix, so that the lining is installed on the steel pipe matrix.

[0009] Specifically, a plurality of second circular through holes are provided on the steel pipe matrix, so that the second connecting piece passes through the second circular through holes to be connected with the first connecting piece.

[0010] Specifically, a flange is provided at the end of the steel pipe matrix.

[0011] The utility model has the following beneficial effects:

[0012] 1) By setting up the concave-convex support frame, the area of the stainless steel layer is increased, enabling the corrosion-resistant layer to be coated on the stainless steel layer;

[0013] 2) In the existing inner lining, the edge of the inner lining is made into an L shape so that the inner lining can just hook at the flange of the steel pipe matrix. In the present utility model, through the first connecting piece and the second connecting piece, the inner lining is installed inside the steel pipe matrix, and the inner lining will not protrude from the steel pipe matrix, avoiding the phenomenon of the inner lining protruding from the steel pipe matrix and eliminating the installation drawbacks;

[0014] 3) The steel pipe matrix and the inner lining are of a detachable structure, facilitating replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural view of the present utility model.

[0016] Figure 2 is a schematic structural view of the inner lining.

[0017] Figure 3 is a schematic structural view of the first connecting piece and the second connecting piece.

[0018] In the figure: 1 - steel pipe matrix; 2 - inner lining; 3 - stainless steel layer; 4 - first connecting piece; 5 - second connecting piece; 6 - anti-corrosion layer; 7 - corrosion-resistant layer; 8 - external thread; 9 - second circular through-hole; 10 - flange. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The present utility model will now be further described in detail with reference to the accompanying drawings.

[0020] As Figures 1-3 shown, a stainless steel-lined oil pipe includes a steel pipe matrix 1. An inner lining 2 that can be disassembled is installed inside the steel pipe matrix 1. The inner lining 2 is provided with a stainless steel layer 3. The stainless steel layer 3 is provided with a concave-convex support frame. A first circular through-hole is provided at the convex surface. A first connecting piece 4 is installed in the first circular through-hole. A base is provided at the first end of the first connecting piece 4, and the base fits with the edge of the convex surface. A screw rod is provided at the second end of the first connecting piece 4, and a second connecting piece 5 that is movably connected to the end of the screw rod is provided at the end of the screw rod. The second connecting piece 5 is provided with a nut, and a baffle is provided at the top of the nut. The inner lining 2 is installed on the steel pipe matrix 1 through the first connecting piece 4 and the second connecting piece 5.

[0021] The inner lining 2 is further provided with an anti-corrosion layer 6 and a corrosion-resistant layer 7. An external thread 8 is provided on the outermost layer of the inner lining 2. The steel pipe matrix 1 is provided with an internal thread so that the inner lining can be installed on the steel pipe matrix 1. A plurality of second circular through-holes 9 are provided on the steel pipe matrix 1 so that the second connecting piece 5 can pass through the second circular through-hole to be connected to the first connecting piece 4. A flange 10 is provided at the end of the steel pipe matrix 1.

[0022] Usage method of the utility model: Place the inner liner 2 inside the steel pipe matrix 1, such that the second circular through-hole 9 and the first connecting member 4 on the inner liner 2 are located at the same position. Then connect the second connecting member 5 to the first connecting member 4 through the second circular through-hole 9, and the diameter of the second circular through-hole 9 is the same as the outer diameter of the nut of the second connecting member 5. Meanwhile, the baffle plate located at the top of the nut blocks the circular through-hole to prevent erosion from the external environment. When necessary, it can be sealed by spot welding. At this time, when the inner liner 2 or the steel pipe matrix 1 is severely corroded, it can be disassembled and replaced.

[0023] It should be noted that in this article, relative terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or sequence between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device.

[0024] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A stainless steel lined oil pipe, characterized in that: It includes a steel pipe base, in which a detachable lining is installed, the lining is provided with a stainless steel layer, the stainless steel layer is provided with a concave and convex support frame, the convex surface of which is provided with a first circular through hole, a first connecting piece is installed in the first circular through hole, the first end of the first connecting piece is provided with a base, the base fits with the edge of the convex surface, the second end of the first connecting piece is provided with a screw, the end of the screw is provided with a second connecting piece movably connected to it, the second connecting piece is provided with a nut, the top of the nut is provided with a baffle, and the liner is installed on the steel pipe base through the first connecting piece and the second connecting piece.

2. The stainless steel lined oil pipe according to claim 1, characterized in that: The inner lining is also provided with an anti-corrosion layer and a corrosion-resistant layer.

3. The stainless steel lined oil pipe according to claim 1, characterized in that: The outermost layer of the lining is provided with external threads, and the steel pipe base is provided with internal threads, so that the lining can be installed on the steel pipe base.

4. The stainless steel lined oil pipe according to claim 1, characterized in that: The steel pipe base is provided with a plurality of second circular through holes, so that the second connecting member can be connected to the first connecting member through the second circular through holes.

5. The stainless steel lined oil pipe according to claim 1, characterized in that: The end of the steel pipe base is provided with a flange.

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