Cathode protection device for long oil and gas conveying pipeline

Abstract

The utility model provides a long oil and gas pipeline cathodic protection device which comprises a box body, an inserting plate and a sealing plate assembly, a clamping piece is installed on the inner wall of one side of the box body, a cathodic protection component is fixed to the clamping piece in a clamping mode, a connecting plate is fixed to the outer wall of one side of the sealing plate assembly, an inserting groove is formed in the side wall of the connecting plate, and the inserting groove is connected with the clamping piece. A first elastic piece and a second elastic piece are installed on the inner wall of the box body, an extrusion block is fixed to the top of the first elastic piece, a rubber pad adheres to one end of the extrusion block, and a roller is movably connected to the other end of the extrusion block. Damage of harmful factors such as moisture and dust in the outdoor environment to the cathode protection component is effectively prevented through the sealing plate assembly, the sealing plate assembly is tightly matched with the box body, especially the double sealing design of the rubber pad and the rubber ring greatly improves the moisture-proof and dust-proof effects, and the service life of the cathode protection component is prolonged. And it is ensured that the cathode protection component can stably operate for a long time in a severe outdoor environment.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline cathodic protection technical field, especially long oil and gas pipeline cathodic protection device. BACKGROUND

[0002] Long oil and gas pipeline as the important infrastructure of energy transportation, its safety and reliability are very important, however, because pipeline is usually laid in complex and changeable natural environment, such as soil, marsh, water area and the like, these environments often contain various electrolytes, lead to pipeline prone to electrochemical corrosion, in order to effectively prevent this kind of corrosion, long oil and gas pipeline generally adopts cathodic protection technology, the basic principle of cathodic protection technology is to apply cathode current to the protected oil and gas pipeline, so that its surface becomes cathode, thereby slowing down or preventing corrosion, when metal pipeline is in electrolyte, due to electrochemical inhomogeneity, corrosion primary cell will be formed, wherein anode part will emit electrons and be corroded, and cathode part will occur reduction reaction, usually will not be corroded, therefore, by making pipeline cathode, the corrosion process can be inhibited;

[0003] Through the retrieval, the patent with china patent application number 202222102258.5 discloses a kind of long oil and gas pipeline cathodic protection device, including cathodic protection equipment, the front of the cathodic protection equipment is equipped with bayonet, the inside of the bayonet is provided with clamping rod, the front of the cathodic protection equipment is provided with cover plate body, the front end of the clamping rod is fixedly connected with the back of cover plate body;

[0004] The long oil and gas pipeline cathodic protection device in the above patent has the following deficiencies: in the process of use, because the sealing mechanism is lacked between the outer circle and the cathodic protection equipment, therefore, moisture and dust can enter the inside of the cathodic protection equipment, which can affect the service life and use effect of the cathodic protection equipment for a long time. Utility model content

[0005] Therefore, the utility model embodiment hopes to provide a kind of long oil and gas pipeline cathodic protection device to solve or alleviate the technical problems in prior art, at least provide a kind of beneficial selection.

[0006] The technical scheme of the embodiment of the utility model is achieved as follows: a long oil and gas pipeline cathode protection device, including box, plugboard and sealing plate assembly, the box one side inner wall is equipped with the clamping piece, and the clamping piece is fixed with the cathode protection component through the clamping mode, the sealing plate assembly one side outer wall is fixed with the connecting plate, and the connecting plate side wall is equipped with the slot, the box inner wall is equipped with elastic piece one and elastic piece two respectively, and the elastic piece one top is fixed with the extrusion block, and the extrusion block one end is bonded with the rubber pad, and the extrusion block other end is movably connected with the roller, the elastic piece two outer wall is equipped with the oblique plate used in cooperation with the roller, and the oblique plate one end is welded with the clamping plate used in cooperation with the slot.

[0007] In some embodiments, the elastic piece one includes a square plate and a lining rod one, the lining rod one is fixed to the inner wall of the box, and the square plate and the bottom of the extrusion block are welded and fixed and movably connected with the lining rod one, and spring three is clamped between the lining rod one side inner wall and the square plate one side outer wall.

[0008] In some embodiments, the elastic piece two includes a slide rod and a spring two, the slide rod is fixed to the inner wall of the box, and the oblique plate is movably connected with the slide rod, and the spring two is clamped between the slide rod one side inner wall and the oblique plate one side inner wall.

[0009] In some embodiments, the sealing plate assembly includes a limiting plate and a cover plate, two limiting plates are respectively welded to the top and bottom inner walls of the cover plate, and the connecting plate and the cover plate are welded and fixed.

[0010] In some embodiments, the clamping piece includes a vertical plate, a guide rod and a spring one, two vertical plates are welded to the inner wall of one side of the box, the guide rod is movably connected to the inner wall of the through hole formed on the surface of the vertical plate, the guide rod one end is fixed with a limiting cover, the spring one is fixed between the limiting cover one side outer wall and the vertical plate one side outer wall, and the guide rod one end is welded with a clamping jaw.

[0011] In some embodiments, the inner wall of one side of the box is fixed with a bearing plate.

[0012] In some embodiments, the outer wall of the cover plate is bonded with a rubber ring.

[0013] In some embodiments, the outer wall of the cover plate is bonded with a rubber ring.

[0014] The utility model discloses an embodiment has the following advantages by adopting the above technical scheme:

[0015] 1, through sealing plate assembly, effectively prevent the moisture, dust and other harmful factors in the outdoor environment from the invasion of cathode protection component, the close cooperation between sealing plate assembly and the box, the double sealing design of rubber pad and rubber ring, improve the moisture-proof and dustproof effect.

[0016] 2. By the elastic force of the two groups of springs, stable clamping and fixing of the cathodic protection component is realized, which not only ensures the stability and safety of the cathodic protection component during installation, but also effectively prevents the equipment from loosening or being damaged due to external factors such as vibration and impact.

[0017] The above summary is intended to illustrate only and is not intended to limit in any way. Further aspects, embodiments and features of the present application will be readily apparent from the following detailed description, taken in conjunction with the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] Figure 1 It is a whole structure diagram of the long oil and gas pipeline cathodic protection device of the present application;

[0020] Figure 2 It is an exploded view of the long oil and gas pipeline cathodic protection device of the present application;

[0021] Figure 3 It is an internal structure diagram of the long oil and gas pipeline cathodic protection device of the present application;

[0022] Figure 4 It is a main body installation structure diagram of the long oil and gas pipeline cathodic protection device of the present application;

[0023] Figure 5 It is a limiting mechanism structure diagram of the long oil and gas pipeline cathodic protection device of the present application.

[0024] Reference signs: box 1, limiting plate 2, handle 3, cover plate 4, plug plate 5, plug groove 6, connecting plate 7, rubber ring 8, extrusion block 9, bearing plate 10, vertical plate 11, cathodic protection component 12, guide rod 13, clamping jaw 14, spring one 15, limiting cover 16, roller 17, spring two 18, clamping plate 19, sliding rod 20, inclined plate 21, spring three 22, square plate 23, lining rod one 24, rubber pad 25. DETAILED DESCRIPTION

[0025] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0028] Example 1

[0029] like Figures 1-5 As shown, this utility model embodiment provides a cathodic protection device for long-distance oil and gas pipelines, including a housing 1, a plug plate 5, and a sealing plate assembly. A clamping member is installed on the inner wall of one side of the housing 1, and the clamping member fixes the cathodic protection component 12 by clamping. A connecting plate 7 is fixed on the outer wall of one side of the sealing plate assembly, and a slot 6 is opened on the side wall of the connecting plate 7. An elastic element one and an elastic element two are respectively installed on the inner wall of the housing 1. A pressing block 9 is fixed on the top of the elastic element one, and a rubber pad 25 is glued to one end of the pressing block 9. A roller 17 is rotatably connected to the other end of the pressing block 9. An inclined plate 21 that cooperates with the roller 17 is installed on the outer wall of the elastic element two, and a clamping plate 19 that cooperates with the slot 6 is welded to one end of the inclined plate 21.

[0030] The cathode protection component 12 can be fixed by the clamping member. In the embodiment, the cathode protection component 12 can be a solid-state decoupler. The basic principle of the solid-state decoupler in the cathode protection of the long-distance oil and gas pipeline is to introduce a high-impedance isolation layer between the electromagnetic interference source and the interfered equipment, thereby reducing or eliminating the transmission of electromagnetic interference. Meanwhile, it has the function of “blocking direct current and passing alternating current”, that is, it prevents the conduction of direct current within a certain voltage range, while providing a low-impedance passage for alternating current. This characteristic enables the solid-state decoupler to effectively identify and isolate stray current and guide it to a safe grounding path. The solid-state decoupler can accurately control the current path of the cathode protection system, prevent current leakage or misflow, and ensure the cathode protection effect. In the long-distance oil and gas pipeline, this helps to prevent current from flowing through unnecessary protection paths, thereby ensuring that current only flows to the surface of the metal structure that needs protection.

[0031] Meanwhile, the basic principle of the cathode protection of the long-distance oil and gas pipeline is to apply a cathode current to the protected oil and gas pipeline to make its surface a cathode, thereby slowing down or preventing corrosion. When metal is in an electrolyte such as soil or water, due to electrochemical heterogeneity, a corrosion primary cell is formed. In the corrosion primary cell, the anode releases electrons and is corroded, while the cathode undergoes a reduction reaction and is not usually corroded. Therefore, by making the pipeline a cathode, its corrosion can be inhibited. The operation process includes checking the protected pipeline, including checking the pipeline-to-ground insulation, checking the pipeline conductivity, and checking the insulation state of the old pipeline to ground, ensuring that the material selection, construction, and design of the cathode protection station are consistent, especially that the anode lead is connected to the positive pole and the pipeline convergence point is connected to the negative pole, and the electrode is strictly prohibited from being connected in reverse. Personnel measure parameters such as the natural potential of the entire pipeline, the soil resistivity, the anode bed grounding resistance of each station, etc. According to the operation procedures of direct current sources such as rectifiers, constant potential instruments, and batteries, the pipeline is powered, and the potential is maintained within a certain range, such as about -1.30 volts. After the pipeline is cathodically polarized for a period of time, such as four hours or more, the output current, voltage, power point potential, pipeline along the line protection potential, protection distance, and other parameters of the direct current source are tested. According to the measured protection potential, the power point potential is adjusted to the specified value, and the pipeline is continuously powered to be completely polarized, usually for more than 24 hours. The more specific process and operation method are prior art, so they are not described here.

[0032] When the cathodic protection component 12 is clamped, since the box 1 is usually installed outdoors, in order to protect the cathodic protection component 12 and improve its moisture-proof and dust-proof capability, the box 1 can be covered by the sealing plate assembly to realize moisture-proof and dust-proof of the cathodic protection component 12. When it is necessary to fix the sealing plate assembly and the box 1, first, the plug plate 5 is abutted against the surface of the rubber pad 25, then the rubber pad 25 is extruded by the plug plate 5, the rubber pad 25 can seal the gap between the extrusion block 9 and the box 1, so as to avoid that dust and moisture enter the inside of the box 1 through the gap. After the plug plate 5 drives the rubber pad 25, the extrusion block 9 drives the roller 17 to move towards the inclined plate 21, the surface of the roller 17 and the inclined plate 21 is inclined, so that the movement direction of the roller 17 is perpendicular to the movement direction of the extrusion block 9, the clamping plate 19 moves towards the outside of the box 1. When the sealing plate assembly completely covers the box 1, the insertion slot 6 on the connecting plate 7 and the clamping plate 19 are opposite to each other at this time, when the plug plate 5 is separated from the rubber pad 25, the clamping plate 19 is re-inserted into the insertion slot 6 by the reset action of the elastic member one and the elastic member two, so as to limit the box 1 and the sealing plate assembly by the clamping plate 19 and the insertion slot 6.

[0033] The elastic member one includes the square plate 23 and the lining rod one 24, the lining rod one 24 is fixed on the inner wall of the box 1 by screws, the square plate 23 and the bottom of the extrusion block 9 are fixed by welding and are in sliding connection with the lining rod one 24, the spring three 22 is clamped between the inner wall of one side of the lining rod one 24 and the outer wall of one side of the square plate 23, the elastic member two includes the slide rod 20 and the spring two 18, the slide rod 20 is fixed on the inner wall of the box 1 by screws, the inclined plate 21 and the slide rod 20 are in sliding connection, the spring two 18 is clamped between the inner wall of one side of the slide rod 20 and the inner wall of one side of the inclined plate 21;

[0034] The spring three 22 and the spring two 18 are used to make the clamping plate 19 re-inserted into the insertion slot 6 on the connecting plate 7 after the plug plate 5 is separated from the rubber pad 25, so as to limit the connecting plate 7.

[0035] The sealing plate assembly includes the limiting plate 2 and the cover plate 4, two limiting plates 2 are respectively welded on the top and the bottom inner wall of the cover plate 4, the outer wall of the cover plate 4 is bonded with the rubber ring 8, and the connecting plate 7 and the cover plate 4 are fixed by welding, the handle 3 is welded on the outer wall of one side of the cover plate 4;

[0036] The rubber ring 8 is used to improve the sealing between the cover plate 4 and the box 1, and the limiting plate 2 is used to limit the maximum distance of the cover plate 4 moving along the box 1.

[0037] The clamping piece comprises a vertical plate 11, a guide rod 13 and a spring 15, the two vertical plates 11 are welded to the inner wall of one side of the box 1, the guide rod 13 is slidably connected to the inner wall of the through hole formed on the surface of the vertical plate 11, one end of the guide rod 13 is fixed with a limiting cover 16, the spring 15 is fixed between the outer wall of one side of the limiting cover 16 and the outer wall of one side of the vertical plate 11, and one end of the guide rod 13 is welded with a clamping jaw 14;

[0038] The elastic force of the two groups of springs 15 enables the two clamping jaws 14 to clamp and fix the cathodic protection component 12 from left and right.

[0039] The inner wall of one side of the box 1 is fixed with a bearing plate 10 through bolts;

[0040] The bearing plate 10 can support the cathodic protection component 12.

[0041] When the cathodic protection component 12 needs to be fixed, the two groups of springs 15 utilize their elastic force to push the clamping jaws 14 to tightly clamp the cathodic protection component 12 from left and right, so that the stable fixing effect is realized, meanwhile, the bearing plate 10 provides additional support for the cathodic protection component 12, and the stability of installation is enhanced, the sealing plate assembly is designed for the device, the rubber ring 8 enhances the sealing property between the cover plate 4 and the box 1, the limiting plate 2 limits the maximum moving distance of the cover plate 4 on the box 1, the slot 6 formed on the connecting plate 7 cooperates with the clamping plate 19 inside the box 1, so that the fixing mechanism of the sealing plate assembly and the box is formed, when the plug plate 5 abuts against and presses the rubber pad 25, the rubber pad 25 is tightly attached to the gap between the box 1 and the pressing block 9, so that the invasion of dust and moisture is effectively prevented, meanwhile, the pressing action of the plug plate 5 drives the pressing block 9 and the roller 17 to move, the movement direction of the roller 17 and the movement direction of the pressing block 9 are perpendicular to each other by utilizing the inclined surface, so that the clamping plate 19 is driven to move to the outside of the box 1, when the sealing plate assembly completely covers the box 1, the slot 6 is opposite to the clamping plate 19, at this time, the plug plate 5 is separated from the rubber pad 25, under the reset action of the spring three 22 and the spring two 18, the clamping plate 19 is re-inserted into the slot 6, so that the stable limiting of the box 1 and the sealing plate assembly is realized, the elastic member one and the elastic member two arranged inside the device jointly constitute the reset mechanism, when the plug plate 5 is separated from the rubber pad 25, the clamping plate 19 is reset and inserted into the slot 6 by utilizing the rebound force of the spring three 22 and the spring two 18, so that the tight fixing of the sealing plate assembly and the box 1 is ensured.

[0042] The above merely describes a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any skilled person in the art can easily think of various changes or replacements within the technical range disclosed by the present application, which should be encompassed in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A cathodic protection device for long oil and gas pipelines comprising a box (1), a plug (5) and a seal plate assembly, characterized in that: The box (1) is provided with a clamping part on one side of the inner wall, and the clamping part is fixed with a cathodic protection part (12) by clamping, one side of the outer wall of the sealing plate assembly is fixed with a connecting plate (7), a slot (6) is formed in the side wall of the connecting plate (7), the inner wall of the box (1) is respectively provided with an elastic part one and an elastic part two, the top of the elastic part one is fixed with an extrusion block (9), one end of the extrusion block (9) is bonded with a rubber pad (25), the other end of the extrusion block (9) is movably connected with a roller (17), the outer wall of the elastic part two is provided with an inclined plate (21) matched with the roller (17), and one end of the inclined plate (21) is welded with a clamping plate (19) matched with the slot (6).

2. The long oil and gas pipeline cathodic protection apparatus of claim 1, wherein: The elastic part one comprises a square plate (23) and a lining rod one (24), the lining rod one (24) is fixed to the inner wall of the box (1), the square plate (23) and the extrusion block (9) are welded and fixed at the bottom and movably connected with the lining rod one (24), and the spring three (22) is clamped between the inner wall of one side of the lining rod one (24) and the outer wall of one side of the square plate (23).

3. The long oil and gas pipeline cathodic protection apparatus of claim 2, wherein: The elastic part two comprises a sliding rod (20) and a spring two (18), the sliding rod (20) is fixed to the inner wall of the box (1), and the inclined plate (21) and the sliding rod (20) are movably connected, and the spring two (18) is clamped between the inner wall of one side of the sliding rod (20) and the inner wall of one side of the inclined plate (21).

4. The long oil and gas pipeline cathodic protection apparatus of claim 3, wherein: The sealing plate assembly comprises a limiting plate (2) and a cover plate (4), two limiting plates (2) are respectively welded to the inner walls at the top and bottom of the cover plate (4), and the connecting plate (7) and the cover plate (4) are welded and fixed.

5. The long oil and gas pipeline cathodic protection apparatus of claim 4, wherein: The clamping part comprises a vertical plate (11), a guide rod (13) and a spring one (15), two vertical plates (11) are welded to the inner wall of one side of the box (1), the guide rod (13) is movably connected to the inner wall of the through hole formed on the surface of the vertical plate (11), one end of the guide rod (13) is fixed with a limiting cover (16), the spring one (15) is fixed between the outer wall of one side of the limiting cover (16) and the outer wall of one side of the vertical plate (11), and the clamping jaw (14) is welded to one end of the guide rod (13).

6. The long oil and gas pipeline cathodic protection apparatus of claim 5, wherein: The box (1) is provided with a bearing plate (10) on one side of the inner wall.

7. The long oil and gas pipeline cathodic protection apparatus of claim 6, wherein: The outer wall of the cover plate (4) is bonded with a rubber ring (8).

8. The long oil and gas pipeline cathodic protection apparatus of claim 7, wherein: The outer wall of one side of the cover plate (4) is welded with a handle (3).

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