Cathode protection device for buried pipeline

Abstract

The utility model relates to the technical field of pipeline protection, and discloses a buried pipeline cathode protection device which comprises a shell and a mounting plate, an electric box is arranged in the shell, and the electric box is connected with an anode cable and a cathode cable; a first annular plate, a second annular plate and a rack are arranged below the mounting plate, a linear sliding groove is formed in the first annular plate, a sliding block is connected to the linear sliding groove in a sliding mode, the sliding block is connected with an arc-shaped mounting piece through a supporting rod, the arc-shaped mounting piece is connected with a cathode cable, the second annular plate is rotationally connected with the first annular plate, and an arc-shaped sliding groove is formed in the second annular plate; the rear portion of the sliding block extends into the arc-shaped sliding groove, teeth are arranged on the circumference of the second annular plate, a motor is arranged in the shell, a gear is connected to the motor, and the gear and the second annular plate are both meshed with the rack. The arc-shaped mounting piece can be driven to be in contact with and separated from the pipe body by controlling forward and reverse rotation of the motor, operation is easy and convenient, mounting and dismounting are quite convenient, and the device is firm and high in stability.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline protection, in particular to a cathode protection device for a buried pipeline. Background Art

[0002] In the oil and gas gathering and transportation industry, underground pipeline transportation is a common method. Underground pipelines are generally placed underground by landfill. They are eroded by liquids underground, and corrosion often occurs on the outside of the pipe wall. At the same time, the fluid in the pipeline will also corrode the pipeline from the inside.

[0003] The combined application of anti-corrosion coating and cathodic protection is currently the most commonly used corrosion control measure for buried pipelines and underground metal structures. Anti-corrosion coating protection refers to the coating of anti-corrosion coating on buried pipelines, equipment and special-shaped parts. Since the anti-corrosion coating usually needs to be made and painted on site, the quality is difficult to reach the quality of prefabricated anti-corrosion coating. There are many coating defects, and improper selection can easily lead to early failure. The so-called cathodic protection technology is to pass a sufficient amount of DC cathode current to the protected underground metal structure to cathodically polarize the outer surface of the steel pipeline to reduce the corrosion potential of the steel pipeline in the soil, reduce the corrosion current or even approach zero, and thus achieve a corrosion control method to prevent the corrosion of the metal structure, thereby requiring the use of a pipeline cathodic protection device.

[0004] Existing pipeline cathodic protection devices need to be buried underground. During the burial process, the protection device is not in firm contact with the pipeline, resulting in poor protection effect. At the same time, the fixing structure on the pipeline is too complicated, making installation and disassembly very inconvenient during replacement or inspection of buried pipelines.

[0005] Therefore, those skilled in the art are in urgent need of developing a cathodic protection device for buried pipelines. Utility Model Content

[0006] The utility model aims to solve the shortcomings in the prior art and proposes a cathode protection device for buried pipelines.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a buried pipeline cathodic protection device, comprising a shell, a mounting plate is provided at the bottom of the shell, an electric box is provided inside the shell, an anode cable is connected to the right side of the electric box, a sacrificial anode is provided at the lower right side of the mounting plate, the anode cable is connected to the sacrificial anode on the side away from the electric box, and a cathode cable is connected to the lower part of the electric box; a first ring plate is provided directly below the mounting plate, a linear slide groove is penetrated through the first ring plate, a slider is slidably connected to the linear slide groove, a support rod is fixedly connected to the slider, the support rod is connected to the arc-shaped mounting piece, the arc-shaped mounting piece is connected to the cathode cable through a connecting line, a first through hole is provided inside the first ring plate, a tube body is provided in the first through hole, and a driving device for controlling the slider is installed on the first ring plate.

[0008] Preferably, the driving device includes a second ring plate, which is located behind the first ring plate and is rotatably connected to the first ring plate. An arc-shaped slide groove is provided through the second ring plate, the rear of the slider extends into the arc-shaped slide groove, and the slider is slidably connected to the arc-shaped slide groove.

[0009] Preferably, a first through hole having the same diameter as that of the first ring plate is provided inside the second ring plate, the tube body and the second ring plate penetrate each other, and a support base is fixedly connected below the first ring plate.

[0010] Preferably, the circumference of the second ring plate is provided with teeth, a rack is provided on one side of the second ring plate, a second through hole is opened on the mounting plate, the top of the rack passes through the second through hole and extends into the shell, a fixed block is provided in the shell, the fixed block and the rack are slidably connected, a motor is provided in the shell, the bottom end of the motor is connected to the mounting plate, the output end of the motor is connected to a gear, and the gear and the second ring plate are both engaged with the rack.

[0011] Preferably, the number of the linear slide grooves and the number of the arc-shaped slide grooves are both three, and the positions of the linear slide grooves and the arc-shaped slide grooves correspond to each other.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. In the utility model, the motor drives the rack to move up and down through the gear, the rack drives the second ring plate to rotate, the arcuate slide groove rotates synchronously with the second ring plate, the arcuate slide groove pushes the rear of the slider, and then drives the slider to slide on the linear slide groove, the slider drives the arcuate mounting piece to move, and by controlling the forward and reverse rotation of the motor, the arcuate mounting piece can be driven to contact and separate from the tube body, the operation is simple, and the installation and disassembly are very convenient.

[0014] 2. In the utility model, the second ring plate is placed coaxially with the first ring plate, and the first ring plate is fixed by a supporting base to ensure the stability of the second ring plate during rotation; by setting a plurality of sets of linear slide grooves and arc-shaped slide grooves, the arc-shaped mounting piece can make multi-directional contact with the tube body, thereby ensuring that the contact between the arc-shaped mounting piece and the tube body is more firm. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front structural sectional view of the utility model;

[0016] Figure 2 This is a cross-sectional view of the back structure of the utility model;

[0017] Figure 3 for Figure 1 A magnified view of the structure at center;

[0018] Figure 4 for Figure 2 Enlarged view of the structure at point B in the middle.

[0019] In the figure: 1-shell; 2-mounting plate; 3-electrical box; 31-anode cable; 32-sacrificial anode; 33-cathode cable; 34-connecting wire; 4-tube body; 5-first ring plate; 6-linear slide; 7-slider; 8-support rod; 9-arc-shaped mounting plate; 10-support base; 11-second ring plate; 12-arc-shaped slide; 13-gear; 14-motor; 15-fixed block; 16-rack. DETAILED DESCRIPTION

[0020] The present invention is described in detail below in conjunction with the drawings and specific embodiments in the embodiments of the present invention. The description here is only used to explain the present invention, but not to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work, any modifications, equivalent replacements, improvements, etc., should be included in the protection scope of the present invention.

[0021] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] See also Figure 1-Figure 4 The utility model provides an embodiment: a buried pipeline cathodic protection device, comprising a shell 1, a mounting plate 2 is provided at the bottom of the shell 1, an electric box 3 is provided inside the shell 1, an anode cable 31 is connected to the right side of the electric box 3, a sacrificial anode 32 is provided at the lower right side of the mounting plate 2, the anode cable 31 is connected to the sacrificial anode 32 on the side away from the electric box 3, and a cathode cable 33 is connected to the lower side of the electric box 3; a first ring plate 5 is provided directly below the mounting plate 2, a linear slide groove 6 is penetrated through the first ring plate 5, a slider 7 is slidably connected to the linear slide groove 6, a support rod 8 is fixedly connected to the slider 7, the support rod 8 is connected to an arc-shaped mounting piece 9, and the arc-shaped mounting piece 9 is connected to the cathode cable 33 through a connecting line 34, a first through hole is provided inside the first ring plate 5, a pipe body 4 is provided in the first through hole, and a driving device for controlling the slider 7 is installed on the first ring plate 5.

[0024] Furthermore, the driving device includes a second ring plate 11, which is located behind the first ring plate 5, and the second ring plate 11 is rotatably connected to the first ring plate 5. An arc-shaped slide groove 12 is penetrated through the second ring plate 11, and the rear of the slider 7 extends into the arc-shaped slide groove 12, and the slider 7 is slidably connected to the arc-shaped slide groove 12. The circumference of the second ring plate 11 is provided with teeth, and a rack 16 is provided on one side of the second ring plate 11. A second through hole is opened on the mounting plate 2, and the top of the rack 16 passes through the second through hole and extends into the housing 1. A fixed block 15 is provided in the housing 1, and the fixed block 15 is slidably connected to the rack 16. A motor 14 is provided in the housing 1, and the bottom end of the motor 14 is connected to the mounting plate 2. The output end of the motor 14 is connected to a gear 13, and the gear The wheel 13 and the second ring plate 11 are both meshed with the rack 16. By starting the motor 14, the motor 14 drives the gear 13 to rotate, and the gear 13 drives the rack 16 to move up and down. The rack 16 meshes with the teeth on the second ring plate 11, thereby driving the second ring plate 11 to rotate; at the same time, the arcuate slide 12 rotates synchronously with the second ring plate 11. Since the first ring plate 5 cannot rotate, the arcuate slide 12 will push the rear of the slider 7, thereby driving the slider 7 to slide on the linear slide 6. The slider 7 is connected to the arcuate mounting piece 9 through the support rod 8, so that the slider 7 drives the arcuate mounting piece 9 to move. By controlling the forward and reverse rotation of the motor 14, the arcuate mounting piece 9 can be driven to contact and separate from the tube body 4. The operation is simple, and the installation and disassembly are very convenient.

[0025] Furthermore, a first through hole with the same diameter as that of the first ring plate 5 is provided inside the second ring plate 11, the tube body 4 and the second ring plate 11 penetrate each other, a support base 10 is fixedly connected to the bottom of the first ring plate 5, the second ring plate 11 is coaxially placed with the first ring plate 5, and the first ring plate 5 is fixed by the support base 10, and a protective box (not shown in the figure) is provided outside the first ring plate 5, the second ring plate 11 and the rack 16 to ensure the stability of the operation of the device.

[0026] Furthermore, the number of the linear slide grooves 6 and the arcuate slide grooves 12 are three each, and the positions of the linear slide grooves 6 and the arcuate slide grooves 12 correspond to each other. By setting multiple groups of linear slide grooves 6 and arcuate slide grooves 12, the arcuate mounting piece 9 can make multi-directional contact with the tube body 4, thereby ensuring that the contact between the arcuate mounting piece 9 and the tube body 4 is more firm.

[0027] Working principle of the utility model: When the utility model is used, the staff fixes the mounting plate 2 on the ground, buries the pipe body 4 underground, inserts the sacrificial anode 32 connected to the anode cable 31 underground, inserts the pipe body 4 into the first through hole of the first ring plate 5 and the second ring plate 11, and then connects the cathode cable 33 to the arc-shaped mounting plate 9 through the connecting line 34, starts the motor 14, the motor 14 drives the gear 13 to rotate, the gear 13 drives the rack 16 to move downward, the rack 16 meshes with the teeth on the second ring plate 11, thereby driving the second ring plate 11 Rotation; at the same time, the arcuate slide groove 12 rotates synchronously with the second ring plate 11. Since the first ring plate 5 cannot rotate, the arcuate slide groove 12 will push the rear of the slider 7, thereby driving the slider 7 to slide on the linear slide groove 6. The slider 7 is connected to the arcuate mounting piece 9 through the support rod 8, so that the slider 7 drives the arcuate mounting piece 9 to move, and the arcuate mounting piece 9 contacts with the pipe body 4, thereby achieving cathodic protection of the pipeline. At the same time, by controlling the forward and reverse rotation of the motor 14, the arcuate mounting piece 9 can be driven to contact and separate with the pipe body 4, which is convenient for subsequent disassembly and maintenance.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A buried pipeline cathodic protection device, comprising a housing (1), characterized in that: A mounting plate (2) is provided at the bottom of the shell (1), an electric box (3) is provided inside the shell (1), an anode cable (31) is connected to the right side of the electric box (3), a sacrificial anode (32) is provided at the lower right side of the mounting plate (2), a side of the anode cable (31) away from the electric box (3) is connected to the sacrificial anode (32), and a cathode cable (33) is connected to the lower side of the electric box (3); A first ring plate (5) is provided directly below the mounting plate (2), a linear slide groove (6) is provided through the first ring plate (5), a slider (7) is slidably connected to the linear slide groove (6), a support rod (8) is fixedly connected to the slider (7), the support rod (8) is connected to an arc-shaped mounting plate (9), and the arc-shaped mounting plate (9) is connected to a cathode cable (33) via a connecting line (34), a first through hole is provided inside the first ring plate (5), a tube body (4) is provided in the first through hole, and a driving device for controlling the slider (7) is installed on the first ring plate (5).

2. A buried pipeline cathodic protection device according to claim 1, characterized in that: The driving device comprises a second ring plate (11), the second ring plate (11) is located behind the first ring plate (5), and the second ring plate (11) is rotatably connected to the first ring plate (5), an arc-shaped slide groove (12) is penetrated through the second ring plate (11), the rear of the slider (7) extends into the arc-shaped slide groove (12), and the slider (7) is slidably connected to the arc-shaped slide groove (12).

3. A buried pipeline cathodic protection device according to claim 2, characterized in that: A first through hole having the same diameter as that of the first ring plate (5) is provided inside the second ring plate (11); the tube body (4) and the second ring plate (11) penetrate each other; and a support base (10) is fixedly connected below the first ring plate (5).

4. A buried pipeline cathodic protection device according to claim 2, characterized in that: The circumference of the second ring plate (11) is provided with teeth, one side of the second ring plate (11) is provided with a rack (16), a second through hole is opened on the mounting plate (2), the top of the rack (16) passes through the second through hole and extends into the shell (1), a fixing block (15) is provided in the shell (1), the fixing block (15) and the rack (16) are slidably connected, a motor (14) is provided in the shell (1), the bottom end of the motor (14) is connected to the mounting plate (2), the output end of the motor (14) is connected to a gear (13), and the gear (13) and the second ring plate (11) are both meshed with the rack (16).

5. The buried pipeline cathodic protection device according to claim 2, characterized in that: The number of the linear slide grooves (6) and the number of the arc-shaped slide grooves (12) are both three, and the positions of the linear slide grooves (6) and the arc-shaped slide grooves (12) correspond to each other.

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