Parallel directly-buried pipeline cathode protection device
By designing a cathode protection device for parallel direct buried pipes, setting connection points in a misalignment and setting an anode assembly on the outside, the problem of anode collision with cables and interfering with current during parallel direct buried pipes is solved, reducing construction difficulty and ensuring the effectiveness of cathode protection.
Patent Information
- Application Number
- CN202421475196.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-06-26
AI Technical Summary
When laying parallel direct buried pipelines, the group anode laying method of a single pipeline causes the anode and anode cable to collide with adjacent pipelines, increasing construction difficulty and may lead to invalid or partial invalid cathode protection.
A cathode protection device for parallel direct buried pipes is designed, and a connection point is arranged in a misaligned manner through a direct buried pipe arranged in parallel, and an anode assembly is provided at each connection point. The anode assembly includes a plurality of anodes and cables. Some anode is located outside the first direct buried pipe, and some anode is located outside the second direct buried pipe, and is connected to the connection point through a cable.
The device sets the anode on the outermost directly buried pipe through the misaligned connection point, avoiding the anode and cable colliding with adjacent pipes during construction, reducing construction difficulty, shortening construction time, and avoiding interfering current between adjacent pipes, ensuring the anode current output and cathode protection effectiveness.
Smart Images
Figure CN222846834U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pipeline anticorrosion, and in particular to a parallel direct-buried pipeline cathodic protection device. Background Art
[0002] Most buried pipelines are made of steel materials. As they are buried under the ground for a long time, they are easily affected by the environment and corroded. In order to solve the problem of buried pipelines being susceptible to corrosion, sacrificial anode cathodic protection is usually used to treat buried pipelines. The principle is that a metal with strong reducing properties is used as the anode protection electrode, which is connected to the protected buried pipeline to form a primary battery. The metal with strong reducing properties will be consumed by oxidation reaction as the negative electrode, and the protected buried pipeline can be avoided from corrosion as the positive electrode.
[0003] Sacrificial anodes can be buried in single or multiple groups. In order to ensure that the anode can provide continuous current, it is more common to bury sacrificial anodes in multiple groups. It is generally appropriate to have four or so anodes in multiple groups, which are buried on both sides of the buried pipeline. However, when multiple buried pipelines are laid in parallel, if the installation and construction is carried out by laying anodes in groups on a single pipeline, the anodes and anode cables will collide with adjacent pipelines, making construction impossible or increasing the difficulty of construction; and when the anodes of adjacent pipelines are buried close to each other, their currents will interfere with each other, and it is possible that the protection potential cannot be reached, resulting in ineffective or partially ineffective cathodic protection.
[0004] Therefore, it is urgent to design a parallel direct buried pipeline cathodic protection device that can reduce the construction difficulty, shorten the construction time, and at the same time ensure the effectiveness of the anode current. Utility Model Content
[0005] In order to overcome the problems existing in the related art, the utility model discloses a parallel direct buried pipeline cathodic protection device, comprising: at least two direct buried pipelines arranged in parallel at intervals, and the two direct buried pipelines located at the outermost sides are respectively a first direct buried pipeline and a second direct buried pipeline; each direct buried pipeline is provided with a plurality of connection points at intervals, and all the connection points are arranged in a staggered manner;
[0006] A group of anode assemblies is provided at each connection point, and the anode assemblies include multiple anodes and cables. Some anodes are located outside the first direct buried pipeline, and other anodes are located outside the second direct buried pipeline. Multiple anodes are connected to the connection points through cables.
[0007] Furthermore, the directly buried pipeline includes a directly buried pipeline body and an anti-corrosion layer sleeved on the directly buried pipeline body, and the connection point is arranged on the directly buried pipeline body.
[0008] Furthermore, the cable and the connection point are welded by thermite welding, and a first anti-corrosion insulation layer is provided on the connection point.
[0009] Furthermore, the first anti-corrosion insulation layer includes a first hot melt adhesive solidified layer arranged from the inside to the outside and a heat shrinkable sheet wrapped on the first hot melt adhesive solidified layer.
[0010] Furthermore, the anode and the cable are connected by copper welding, and a second anti-corrosion insulation layer is provided at the welding point between the anode and the cable.
[0011] Furthermore, the second anti-corrosion insulation layer includes an epoxy resin layer, a first insulation tape layer, a first heat shrink sleeve and a second insulation tape layer which are sequentially sleeved from the inside to the outside.
[0012] Furthermore, the spacing distance L between adjacent anodes on the same side of each group of anode assemblies is 2 to 3 m.
[0013] Furthermore, the distance W between the anode and the outer wall of the first directly buried pipeline or the second directly buried pipeline is 3m to 5m.
[0014] Furthermore, the anode outer shell is provided with a cotton bag, and a filling material is filled between the anode and the cotton bag.
[0015] Furthermore, the cable comprises at least two cable segments, an aluminum thermite welding spot is arranged between adjacent cable segments, a second hot melt adhesive solidified layer is arranged on the aluminum thermite welding spot, and a second heat shrink sleeve is arranged on the second hot melt adhesive solidified layer.
[0016] Compared with the prior art, the parallel direct buried pipeline cathodic protection device of the utility model has the following beneficial effects:
[0017] The utility model arranges the anode on the outer sides of the first and second directly buried pipelines at the outermost sides through the staggered connection points, thereby avoiding collision between the anodes and the cables between adjacent directly buried pipelines during construction, reducing the construction difficulty and shortening the construction time; at the same time, this structure also avoids interference currents between adjacent pipelines due to the closely buried anodes, thereby ensuring the output of anode current and the effectiveness of cathode protection. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0019] Figure 1 It is a schematic diagram of the planar structure of the cathodic protection device for parallel direct buried pipelines;
[0020] Figure 2 It is a schematic diagram of the cross-sectional structure of the cathodic protection device for parallel direct buried pipelines;
[0021] Figure 3 It is a schematic diagram of the plan structure of another embodiment of a parallel direct buried pipeline cathodic protection device;
[0022] Figure 4 It is a schematic diagram of the welding cross-sectional structure of the cable and the direct buried pipeline of the parallel direct buried pipeline cathodic protection device;
[0023] Figure 5 It is a schematic diagram of the anode monomer structure of the parallel direct buried pipeline cathodic protection device;
[0024] Figure 6 It is a parallel direct buried pipeline cathodic protection device Figure 5 Schematic diagram of the structure at A in the middle;
[0025] Figure 7 It is a schematic diagram of the cable and cable welding structure of the parallel direct buried pipeline cathodic protection device.
[0026] Wherein: 1-direct buried pipeline, 100-direct buried pipeline body, 110-anti-corrosion layer, 11-first direct buried pipeline, 12-second direct buried pipeline, 2-connection point, 3-anode assembly, 31-anode, 32-cable, 320-cable segment, 4-first anti-corrosion insulation layer, 41-first hot melt adhesive solidifying layer, 42-heat shrinking sheet, 5-second anti-corrosion insulation layer, 51-epoxy resin layer, 52-first insulating tape layer, 53-first heat shrinking sleeve, 54-second insulating tape layer, 6-cotton bag, 7-filling material, 8-aluminum thermite welding point, 9-second hot melt adhesive solidifying layer, 10-second heat shrinking sleeve. DETAILED DESCRIPTION
[0027] The following will be combined with the drawings in 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 belong to the protection scope of the utility model.
[0028] like Figures 1 to 7 As shown, the utility model provides a parallel direct buried pipeline cathodic protection device, comprising: at least two direct buried pipelines 1 arranged in parallel at intervals, and the two direct buried pipelines 1 located at the outermost sides are respectively a first direct buried pipeline 11 and a second direct buried pipeline 12; each direct buried pipeline 1 is provided with a plurality of connection points 2 at intervals, and all the connection points 2 are staggered;
[0029] A group of anode assemblies 3 are provided on each connection point 2. The anode assemblies 3 include multiple anodes 31 and cables 32. Some of the anodes 31 are located outside the first directly buried pipeline 11, and other parts of the anodes 31 are located outside the second directly buried pipeline 12. Multiple anodes 31 are connected to the connection point 2 through cables 32.
[0030] like Figure 1 to Figure 2 As shown, in this embodiment, there are two direct buried pipelines 1, each group of anode assemblies 3 includes four anodes 31, and four cables 32 connected to the four anodes 31 are centrally connected to the connection point 2. The four anodes 31 are symmetrically arranged in pairs on both sides of the first direct buried pipeline 11 and the second direct buried pipeline 12. There is no limit on the number of anodes 31 and cables 32, and technical personnel in this field can design them according to actual needs.
[0031] like Figure 3 As shown, in another embodiment, there are three direct buried pipelines 1, each group of anode assemblies 3 includes four anodes 31, and four cables 32 connected to the four anodes 31 are centrally connected at the connection point 2. The four anodes 31 are symmetrically arranged on both sides of the first direct buried pipeline 11 and the second direct buried pipeline 12. The connection point 2 of the first direct buried pipeline 11, the second direct buried pipeline 12 and the direct buried pipeline 1 located between the two direct buried pipelines are staggered with each other to ensure that the anodes 31 and the cables 32 do not collide with each other. At the same time, a certain distance is maintained between the anodes on the same side to avoid the formation of interference current, thereby ensuring the output of anode current and the effectiveness of cathodic protection.
[0032] The utility model arranges the anode 31 outside the first directly buried pipeline 11 and the second directly buried pipeline 12, so as to avoid collision between the anode and the cable between the first directly buried pipeline 11 and the second directly buried pipeline 12 during construction, thereby reducing construction difficulty and shortening construction time; at the same time, it also avoids interference current between the first directly buried pipeline 11 and the second directly buried pipeline due to the close burial of the anode, thereby ensuring the effectiveness of anode current output and cathode protection.
[0033] Specifically, Figures 1 to 4 As shown, in this embodiment, the direct-buried pipeline 1 includes a direct-buried pipeline body 100 and an insulating layer 110 sleeved on the direct-buried pipeline body 100, and the connection point 2 is set on the direct-buried pipeline body 100.
[0034] Specifically, Figures 1 to 4 As shown, in this embodiment, the cable 32 and the direct buried pipeline 1 are welded by thermite, the connection point 2 is an aluminothermic welding point, and the first anti-corrosion insulation layer 4 is provided on the connection point 2. In this embodiment, the operator needs to use an electric grinder to grind off a certain area of the anti-corrosion layer 110 on the surface of the direct buried pipeline 1 before welding until the direct buried pipeline body 100 is exposed, and then gather one end of the four cables 32 together for thermite welding, and then cover the first anti-corrosion insulation layer 4 after forming the connection point 2.
[0035] Specifically, Figure 4 As shown, in this embodiment, the first anti-corrosion insulation layer 4 includes a first hot melt adhesive solidified layer 41 arranged from the inside to the outside and a heat shrink sheet 42 wrapped on the first hot melt adhesive solidified layer 41. The operator bakes the hot melt adhesive and melts it to cover the connection point 2 to form the first hot melt adhesive solidified layer 41. Preferably, the first hot melt adhesive solidified layer 41 is as thick as the anti-corrosion layer of the direct buried pipeline 1. After the first hot melt adhesive solidified layer 41 is cured and dried, the heat shrink sheet 42 is heated to cover and seal the first hot melt adhesive solidified layer 41. In order to better ensure the sealing effect, after the first hot melt adhesive solidified layer 41 is cured and dried, the periphery is smoothed with epoxy putty and then covered with the heat shrink sheet 42.
[0036] Specifically, Figure 5 to Figure 6 As shown, in this embodiment, the anode 31 and the cable 32 are connected by copper welding, and a second anti-corrosion insulation layer 5 is provided at the welding point between the anode 31 and the cable 32.
[0037] Specifically, Figure 6 As shown, in this embodiment, the second anti-corrosion insulating layer 5 includes an epoxy resin layer 51, a first insulating tape layer 52, a first heat shrink sleeve 53 and a second insulating tape layer 54, which are sequentially sleeved from the inside to the outside. In this embodiment, the second anti-corrosion insulating layer 5 is provided to ensure that the anode 31 and the cable 32 are firmly welded and have good insulation.
[0038] Specifically, Figure 1 As shown, in this embodiment, the spacing distance L between adjacent anodes 31 on the same side of each group of anode assemblies 3 is 2 to 3 m.
[0039] Specifically, Figure 2 As shown, the distance W between the anode 31 and the outer wall of the first directly buried pipeline 11 or the second directly buried pipeline 12 in this embodiment is 3m to 5m, and the minimum distance W should not be less than 0.5m. The buried depth H of the anode 31 should be such that the top of the anode 31 is not less than 1m from the ground.
[0040] Specifically, Figure 5 As shown, in this embodiment, a cotton bag 6 is provided on the outer shell of the anode 31 , and a filling material 7 is filled between the anode 31 and the cotton bag 6 .
[0041] Specifically, Figure 5 to Figure 6As shown, the cable 32 in this embodiment includes at least two cable segments 320, and an aluminum thermite welding spot 8 is provided between adjacent cable segments 320. The aluminum thermite welding spot 8 is covered with a second hot melt adhesive solidified layer 9, and the second hot melt adhesive solidified layer 9 is covered with a second heat shrink sleeve 10. When the cable 32 is not long enough, the operator needs to perform aluminum thermite welding on the two cable segments 320 to form the aluminum thermite welding spot 8 after welding, heat the hot melt adhesive to form the second hot melt adhesive solidified layer 9 outside the aluminum thermite welding spot 8, and finally heat the second heat shrink sleeve 10 to cover the second hot melt adhesive solidified layer 9, so as to achieve the insulation and sealing connection of the two cable segments 320.
[0042] 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.
[0043] The utility model is further described above with the help of specific embodiments, but it should be noted that the specific description here should not be understood as limiting the essence and scope of the utility model. Various modifications made to the above embodiments by ordinary technicians in this field after reading this specification are all within the scope of protection of the utility model.
Claims
1. A parallel direct buried pipeline cathodic protection device, characterized in that: include: At least two directly buried pipelines (1) are arranged in parallel and at intervals, and the two directly buried pipelines (1) located at the outermost sides are respectively a first directly buried pipeline (11) and a second directly buried pipeline (12); each of the directly buried pipelines (1) is provided with a plurality of connection points (2) at intervals, and all the connection points (2) are arranged in staggered positions; A group of anode assemblies (3) are provided on each of the connection points (2), the anode assemblies (3) comprising a plurality of anodes (31) and cables (32), a portion of the anodes (31) being located outside the first directly buried pipeline (11), another portion of the anodes (31) being located outside the second directly buried pipeline (12), and a plurality of the anodes (31) being connected to the connection point (2) via cables (32).
2. The parallel direct buried pipeline cathodic protection device according to claim 1 is characterized in that: The directly buried pipeline (1) comprises a directly buried pipeline body (100) and an anti-corrosion layer (110) sleeved on the directly buried pipeline body (100); the connection point (2) is arranged on the directly buried pipeline body (100).
3. The parallel direct buried pipeline cathodic protection device according to claim 2 is characterized in that: The cable (32) and the connection point (2) are welded by thermite welding, and a first anti-corrosion insulation layer (4) is provided on the connection point (2).
4. The parallel direct buried pipeline cathodic protection device according to claim 3 is characterized in that: The first anti-corrosion insulating layer (4) comprises a first hot melt adhesive solidified layer (41) arranged from the inside to the outside and a heat shrinkable sheet (42) wrapped around the first hot melt adhesive solidified layer.
5. The parallel direct buried pipeline cathodic protection device according to claim 1, characterized in that: The anode (31) and the cable (32) are connected by copper welding, and a second anti-corrosion insulation layer (5) is provided at the welding point between the anode (31) and the cable (32).
6. The parallel direct buried pipeline cathodic protection device according to claim 5, characterized in that: The second anti-corrosion insulating layer (5) comprises an epoxy resin layer (51), a first insulating tape layer (52), a first heat shrink sleeve (53) and a second insulating tape layer (54) which are sequentially sleeved from the inside to the outside.
7. The parallel direct buried pipeline cathodic protection device according to claim 1, characterized in that: The spacing distance L between the adjacent anodes (31) on the same side of each group of the anode assemblies (3) is 2 to 3 m.
8. The parallel direct buried pipeline cathodic protection device according to claim 1, characterized in that: The distance W between the anode (31) and the outer wall of the first directly buried pipeline (11) or the second directly buried pipeline (12) is 3m to 5m.
9. The parallel direct buried pipeline cathodic protection device according to claim 1, characterized in that: The outer jacket of the anode (31) is provided with a cotton bag (6), and a filling material (7) is filled between the anode (31) and the cotton bag (6).
10. The parallel direct buried pipeline cathodic protection device according to claim 1, characterized in that: The cable (32) comprises at least two cable segments (320), and an aluminum thermite welding spot (8) is provided between adjacent cable segments (320). The aluminum thermite welding spot (8) is provided with a second hot melt adhesive solidified layer (9) on its outer sheath, and the second hot melt adhesive solidified layer (9) is provided with a second heat shrink sleeve (10) on its outer sheath.