Special equipment for electroplating nickel and copper on inner wall of long bent steel pipe

Abstract

The utility model discloses special equipment for electroplating nickel and copper on the inner wall of a long bent steel pipe, and relates to the field of electroplating equipment, in particular to the special equipment for electroplating nickel and copper on the inner wall of the long bent steel pipe, which comprises a long bent steel pipe body and an electroplating liquid storage tank, the two ends of the anode metal thin rod are of a spring-shaped structure, the anode metal thin rod is fixed by being matched with the anode sealing cover and the cathode sealing cover, the anode sealing cover and the cathode sealing cover are connected with the electroplating liquid storage box through a pump pipe and a backflow pipe respectively, and a constant-temperature heating system, a stirrer and a circulating pump are arranged in the electroplating liquid storage box. According to the special equipment for electroplating the nickel and the copper on the inner wall of the long bent steel pipe, the anode metal thin rod is guided into the long bent steel pipe through the triangular support, the anode metal thin rod is prevented from generating deflection to be in contact with the inner wall of the steel pipe, and therefore the anode is arranged, and electroplating of the inner wall of the long bent steel pipe is achieved.

Description

Technical Field

[0001] The utility model belongs to the field of electroplating equipment, in particular to special equipment for electroplating nickel and copper on the inner wall of a long curved steel pipe. Background Art

[0002] As a special downhole tool in the field of oil and gas exploration and development, coiled tubing is a new type of oil pipe material that can reach several thousand meters in length and can be bent repeatedly to achieve multiple plastic deformations. Due to the diversity, speed and reliability of coiled tubing operations, coiled tubing and its operating equipment are called "universal operating machines". At present, coiled tubing has become an indispensable oil equipment in oilfield operations. When the coiled tubing is in operation, the coiled tubing, which is several thousand meters long, is wound on a reel. When it is necessary to carry out the downhole task, it is opened from the reel and straightened. After the operation is completed, it is lifted from the well and re-wound on the reel. The material used for the coiled tubing is CT70 carbon steel, which has high yield strength and tensile strength. The main component of CT70 carbon steel is Fe (content is about 95%). Therefore, although CT70 has excellent mechanical properties, its corrosion resistance is poor. At the same time, during the operation of the coiled tubing, the fluid of the oil and gas wells often contains many corrosive gases, organic acids, salts and other pollutants. Common corrosive species include carbon dioxide, hydrogen sulfide, water, organic acids (formic acid, acetic acid, etc.) and salts (sodium chloride, calcium chloride, magnesium chloride, ammonium chloride, etc.), which may cause corrosion inside the coiled tubing at any stage of the production, purification, storage and transportation process, which will affect its productivity, efficiency and continuous production. Therefore, in order to solve the above problems, it is necessary to enhance the anti-corrosion performance of the inner wall of the coiled tubing that is thousands of meters long.

[0003] After searching the existing technologies and equipment, such as the patent with application number 202121748127.3 (application date 2021.07.29), the new patent discloses a system for electroplating the inner wall of a pipe, which is electroplated by a clamp and an electroplating bracket under the lifting of a hoisting crane.

[0004] The applicant found that the above patent is to electroplate on the inner wall of a short straight steel pipe, and the steel pipe used is a short and straight steel pipe. The electroplated steel pipe needs to be completely placed in the electroplating solution, and the outer wall of the steel pipe needs to be insulated. At the same time, in order not to pollute the electroplating solution, the entire steel pipe needs to be pre-treated before plating (such as degreasing, cleaning, etc.). The electroplating equipment is not convenient enough, the operation is cumbersome, the process is difficult, and it is impossible to electroplate the inner wall of a continuous curved pipe that is thousands of meters long. Utility Model Content

[0005] In order to solve the problems raised in the above background technology, the utility model provides a special device for electroplating nickel and copper on the inner wall of a long curved steel pipe.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A special device for electroplating nickel and copper on the inner wall of a long curved steel pipe, comprising a long curved steel pipe body and a plating liquid storage tank, wherein an anode metal thin rod serving as an electroplating anode is arranged inside the long curved steel pipe body, and both ends of the anode metal thin rod are bent into a spring-like structure, and an anode sealing cover and a cathode sealing cover are fixed at both ends of the long curved steel pipe body, the anode sealing cover is connected to a pump pipe, and the pump pipe is connected to the plating liquid storage tank, the cathode sealing cover is connected to a reflux pipe, and the reflux pipe is connected to the plating liquid storage tank, and a circulation pump and a stirrer are arranged inside the plating liquid storage tank.

[0008] Preferably, triangular braces are distributed at intervals on the anode metal rod, the size of the triangular braces is slightly smaller than the inner diameter of the long curved steel pipe body, the material used for the triangular braces is polytetrafluoroethylene, and the number of the triangular braces is set at every 50 cm according to the length of the long curved steel pipe body.

[0009] Preferably, the inner walls of the anode sealing cover and the cathode sealing cover are provided with threaded structures and are fixed to both ends of the long curved steel pipe body.

[0010] Preferably, the side wall and bottom of the electroplating liquid storage box are respectively equipped with a constant temperature heating system and an agitator, and a circulation pump is arranged inside the electroplating liquid storage box, and the circulation pump is connected to the long curved steel pipe body through a pump pipe.

[0011] Preferably, a reflux pipe is provided at the upper side of the electroplating liquid storage box, and the reflux pipe is connected to the long curved steel pipe body through the cathode sealing cover.

[0012] Preferably, an anode conductive fixing platform is provided inside the anode sealing cover, and a cathode fixing platform is provided inside the cathode sealing cover. The anode conductive fixing platform and the cathode fixing platform are matched with the spring-like structures at both ends of the anode metal rod and fix the anode metal rod.

[0013] Preferably, the anode conductive fixing station connects the anode metal rod to the positive electrode of the external power supply, and the cathode fixing station connects the inner wall of the long curved steel pipe body to the negative electrode of the external power supply, thereby forming a current loop for electroplating.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. In the utility model, a constant temperature heating system, an agitator and a circulation pump are provided in the plating liquid storage box, the constant temperature heating system is used to heat the plating liquid and keep the temperature of the plating liquid at a set value, the plating liquid is transported to the inside of the long curved steel pipe by the circulation pump, the plating liquid is circulated by the pump pipe and the reflux pipe, the uniformity and stability of the plating liquid are maintained, and the electroplating efficiency is improved.

[0016] 2. In the utility model, the plating liquid is transported to the inside of the long curved steel pipe through an external plating liquid storage box, and only the plating liquid is allowed to contact the inner wall of the long curved steel pipe to be plated. The electroplating process is completed inside the long curved steel pipe, and there is no need for any pre-plating pretreatment (such as insulation, degreasing, and cleaning) of the outer wall of the steel pipe, thereby avoiding contamination of the plating liquid, separating the electroplating equipment from the workpiece to be plated, simplifying the electroplating process, and improving the convenience of the long curved steel pipe electroplating equipment.

[0017] 3. In the utility model, a triangular support is arranged on the thin anode metal rod, and the thin anode metal rod is guided into the long curved steel pipe through an external traction device. Under the action of the triangular support, the thin anode metal rod is prevented from bending and contacting the inner wall of the pipe, so that the thin anode metal rod is always kept in the center of the long curved steel pipe.

[0018] 4. Bend both ends of the anode metal rod into a spring-like structure, nest it in the anode conductive fixing platform and the cathode fixing platform to fix it firmly, and connect it to an external power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0020] Figure 2 It is a top view of the overall structure of the utility model.

[0021] Figure 3 This is a schematic diagram of the cathode sealing cover structure of the utility model.

[0022] Figure 4 It is a cross-sectional schematic diagram of the anode sealing cover of the utility model.

[0023] Figure 5 This is a schematic diagram of the position of the anode metal thin rod and the triangular support of the utility model.

[0024] In the figure: 1-electroplating solution storage box, 101-constant temperature heating system, 102-agitator, 2-circulation pump, 3-pump pipe, 4-anode sealing cover, 401-anode conductive fixing platform, 5-long bent steel pipe body, 6-anode metal thin rod, 7-triangular support, 8-cathode sealing cover, 801-cathode fixing platform, 9-reflux pipe. 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] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected", "connected", "fixed", 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, it can be an electrical connection, it can be a direct connection, it can be indirectly connected through an intermediate medium, and it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] In the description of the present utility model, it should be noted that the term "slightly smaller than" is used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the size of the indicated technical feature.

[0028] See also Figure 1-5 ,This utility model provides the following technical solutions:

[0029] A special device for electroplating nickel and copper on the inner wall of a long curved steel pipe, comprising a long curved steel pipe body 5 and a plating liquid storage tank 1, wherein an anode metal thin rod 6 and a triangular support 7 serving as an electroplating anode are arranged inside the long curved steel pipe body 5, and both ends of the anode metal thin rod 6 are bent into a spring-like structure, and an anode sealing cover 4 and a cathode sealing cover 8 are fixed at both ends of the long curved steel pipe body 5, the anode sealing cover 4 is connected to a pump pipe 3, and the pump pipe 3 is connected to the plating liquid storage tank 1, the cathode sealing cover 8 is connected to a reflux pipe 9, and the reflux pipe 9 is connected to the plating liquid storage tank 1, and a circulating pump 2 and an agitator 102 are arranged inside the plating liquid storage tank 1.

[0030] During the specific implementation, triangular supports 7 are distributed at intervals on the anode metal rod 6. The size of the triangular supports 7 is slightly smaller than the inner diameter of the long curved steel pipe body 5. The material used for the triangular supports 7 is polytetrafluoroethylene, and the number of triangular supports 7 is set every 50 cm according to the length of the long curved steel pipe body 5.

[0031] During specific implementation, the inner walls of the anode sealing cover 4 and the cathode sealing cover 8 are provided with threaded structures, and are fixed to both ends of the long curved steel pipe body 5 .

[0032] During the specific implementation, the side wall and bottom of the electroplating liquid storage box 1 are respectively equipped with a constant temperature heating system 101 and an agitator 102. A circulation pump 2 is arranged inside the electroplating liquid storage box 1. The circulation pump 2 is connected to the long curved steel pipe body 5 through a pump pipe 3.

[0033] During the specific implementation, a reflux pipe 9 is provided at the upper side of the electroplating liquid storage box 1 , and the reflux pipe 9 is connected to the long curved steel pipe body 5 through the cathode sealing cover 8 .

[0034] During the specific implementation, an anode conductive fixing platform 401 is provided inside the anode sealing cover 4, and a cathode fixing platform 801 is provided inside the cathode sealing cover 8. The anode conductive fixing platform 401 and the cathode fixing platform 801 are matched with the spring-like structures at both ends of the anode metal rod 6 to fix the anode metal rod 6.

[0035] During the specific implementation, the anode conductive fixing platform 401 connects the anode metal rod 6 to the positive pole of the external power supply, and the cathode fixing platform 801 connects the inner wall of the long curved steel pipe body 5 to the negative pole of the external power supply, thereby forming a current loop for electroplating.

[0036] All electrical appliances in the utility model device adopt external power supply.

[0037] The working principle and process of the utility model are as follows:

[0038] S1. First, the user uses an external traction device to push the anode metal rod into the long bent steel pipe from one end of the long bent steel pipe with the assistance of a triangular support, until the spring structure at the other end of the anode metal rod protrudes from the long bent steel pipe, and then the spring-like structure at one end of the anode metal rod is nested in the anode conductive fixing platform of the anode sealing cover, and the anode sealing cover is fixed to one end of the long steel pipe through the internal threaded structure; then, the spring-like structure at the other end of the anode metal rod is nested in the cathode fixing platform of the cathode sealing cover, and the cathode sealing cover is fixed to the other end of the long steel pipe through the internal threaded structure, thereby completing the sealing of the long bent steel pipe, and finally, the anode sealing cover is connected to the positive pole of the external power supply, and the cathode sealing cover is connected to the negative pole of the external power supply.

[0039] S2. Start the constant temperature heating system and agitator on the plating solution storage tank to stir the plating solution to keep the composition uniform. The constant temperature heating system maintains the plating solution at a set process temperature.

[0040] S3. Connect the pump tube to the anode sealing cover, connect one end of the reflux tube to the cathode sealing cover, and the other end to the plating solution storage tank. Finally, when the plating solution reaches the set process temperature, turn on the circulation pump to allow the plating solution to enter the long curved steel pipe. After the plating solution circulation is stable, connect the external power supply for electroplating.

[0041] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A special device for electroplating nickel copper on the inner wall of a long curved steel pipe, comprising a long curved steel pipe body (5) and a plating liquid storage tank (1), Features: An anode metal thin rod (6) serving as an electroplating anode is arranged inside the long curved steel pipe body (5), and the two ends of the anode metal thin rod (6) are bent into a spring-like structure. An anode sealing cover (4) and a cathode sealing cover (8) are fixed to the two ends of the long curved steel pipe body (5). The anode sealing cover (4) is connected to a pump pipe (3), and the pump pipe (3) is connected to an electroplating liquid storage tank (1). The cathode sealing cover (8) is connected to a reflux pipe (9), and the reflux pipe (9) is connected to an electroplating liquid storage tank (1). A circulation pump (2) and an agitator (102) are arranged inside the electroplating liquid storage tank (1).

2. According to claim 1, a special equipment for electroplating nickel copper on the inner wall of a long curved steel pipe, Features: Triangular braces (7) are distributed at intervals on the anode metal thin rod (6). The size of the triangular braces (7) is slightly smaller than the inner diameter of the long curved steel pipe body (5). The material used for the triangular braces (7) is polytetrafluoroethylene, and the number of the triangular braces (7) is set at every 50 cm according to the length of the long curved steel pipe body (5).

3. The special equipment for electroplating nickel copper on the inner wall of a long curved steel pipe according to claim 1, Features: The inner walls of the anode sealing cover (4) and the cathode sealing cover (8) are provided with threaded structures and are fixed to both ends of the long curved steel pipe body (5).

4. The special equipment for electroplating nickel copper on the inner wall of a long curved steel pipe according to claim 1, Features: The side wall and bottom of the electroplating liquid storage box (1) are respectively provided with a constant temperature heating system (101) and a stirrer (102); a circulating pump (2) is arranged inside the electroplating liquid storage box (1); and the circulating pump (2) is connected to the long curved steel pipe body (5) via a pump pipe (3).

5. The special equipment for electroplating nickel copper on the inner wall of a long curved steel pipe according to claim 1, Features: A reflux pipe (9) is provided on the upper side of the electroplating liquid storage box (1), and the reflux pipe (9) is connected to the long curved steel pipe body (5) through the cathode sealing cover (8).

6. The special equipment for electroplating nickel copper on the inner wall of a long curved steel pipe according to claim 1, Features: The anode sealing cover (4) is provided with an anode conductive fixing platform (401) inside, and the cathode sealing cover (8) is provided with a cathode fixing platform (801) inside. The anode conductive fixing platform (401) and the cathode fixing platform (801) are matched with the spring-like structures at both ends of the anode metal thin rod (6) and fix the anode metal thin rod (6).

7. The special equipment for electroplating nickel copper on the inner wall of a long curved steel pipe according to claim 6, Features: The anode conductive fixing platform (401) connects the anode metal thin rod (6) to the positive electrode of the external power supply, and the cathode fixing platform (801) connects the inner wall of the long curved steel pipe body (5) to the negative electrode of the external power supply, thereby forming a current loop for electroplating.

Images