Auxiliary anode for cathode protection feed test

Abstract

The utility model discloses an auxiliary anode for a cathode protection feed test, which comprises a pre-packaged anode connected with a protected body through a direct-current power supply, and the pre-packaged anode comprises an anode body positioned in the center of the pre-packaged anode; the carbonaceous filler uniformly wraps the periphery of the anode body; the wrapping fabric layer is used for wrapping the carbonaceous filler around the anode body, and the two ends of the wrapping fabric layer are sealed by strapping tapes; the wear-resistant woven mesh wraps the outer side of the wrapping fabric layer and is used for providing mechanical protection for the pre-packaged anode; and one end of the anode cable is fixed at the middle position in the anode body through a cable connecting piece and is sealed by a first epoxy resin sealant, and the other end of the anode cable is connected with the positive electrode of the direct-current power supply. According to the utility model, a pre-packaging form is adopted, the use is convenient, the purchasing and assembling processes of materials such as the anode body, the filler and the anode cable before a test on a test site can be avoided, and the weight is light and the carrying is convenient; the service life is long and long-term use can be realized.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of cathodic protection, especially relates to a cathodic protection auxiliary anode for feeding test. BACKGROUND

[0002] The cathodic protection feeding test is to establish a direct current from the temporary auxiliary anode ground bed to the protected body to determine the required protection current density value of the protected body. In order to take a more effective and reasonable cathodic protection design scheme for the protected body, the feeding test becomes an effective measure for the cathodic protection design, especially for the cathodic protection engineering of the buried metal structure in the in-service station area. The protected structure in these areas is complex, the grounding system is multiple, and the interference and shielding problems are easy to occur. It is difficult to determine the appropriate design technical parameters according to the experience value. The feeding test can estimate the required protection current value of the protected buried facility, design the necessary technical parameters such as the current density, optimize the position and type of the anode ground bed, and take corresponding measures to prevent the protection deficiency and interference phenomenon, thereby providing data support for the design of the cathodic protection system.

[0003] The components of the feeding test mainly include a direct current source, an auxiliary anode, a cable, a reference electrode, a voltmeter, an ammeter and the like. Except for the auxiliary anode, other devices and instruments can be directly used. The auxiliary anode needs to be made on site. The auxiliary anode is composed of an auxiliary anode body, backfilling material and an anode cable. If it is a deep well ground bed, the anode needs to be pre-packaged. Although the amount of these materials used in the test process is not large, they need to be purchased and assembled on site before each feeding test. The process is complex. After the feeding test is completed, these auxiliary anode materials may be abandoned on site due to the inconvenient recycling under the site conditions, especially the coke powder filling material, which is mixed with the soil after being buried and is not convenient to recycle, thereby easily causing resource waste and environmental pollution. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies of the auxiliary anode in the feeding test in the prior art, the technical problem solved by the utility model is to provide an auxiliary anode for feeding test in cathodic protection. The anode is in a pre-packaged form, which is convenient for direct use on the test site, avoids the process of re-purchasing and assembling the auxiliary anode body material before each feeding test, has light quality, is convenient to carry, has long service life and can be used for a long time. The anode can also be reused, thereby avoiding material waste and environmental pollution.

[0005] In order to solve the above technical problems, the utility model discloses a kind of auxiliary anode for cathodic protection feed test, including the pre-packaged anode connected by direct current power and protected body, the pre-packaged anode includes: anode body, in the center of pre-packaged anode;Carbonaceous filler, uniformly wrapped around the anode body;Wrap fabric layer, for the carbonaceous filler is wrapped around anode body, the both ends of the wrap fabric layer are sealed with binding tape;Abrasion-resistant woven mesh, wrapped outside the wrap fabric layer, for pre-packaged anode provides mechanical protection;Anode cable, one end is fixed in the intermediate position in the anode body by cable connector, and is sealed with first epoxy resin sealant, the other end of the anode cable is connected with the positive pole of the direct current power.

[0006] From the above, the auxiliary anode for cathodic protection feed test of the utility model adopts pre-packaged form, convenient to use, can avoid the purchase and assembly process of anode body, filler, anode cable and other materials before test site test.The anode is light in quality, and is convenient to carry;Long service life, can be used for a long time.The pre-packaged anode of the utility model can be reused, which saves materials and avoids pollution to soil and other environments.

[0007] Optionally, the base body of the anode body is a titanium pipe in a tubular shape, and the cross section of the titanium pipe is circular;The surface of the titanium pipe is coated with a mixed metal oxide coating.

[0008] From the above, the mixed metal oxide anode body has the advantages of light weight, high output current density, low consumption rate and long service life.

[0009] Further, the carbonaceous filler includes calcined petroleum coke powder.

[0010] From the above, the carbonaceous filler has the effects of increasing anode output current, increasing anode surface area and reducing anode consumption.

[0011] Optionally, the two ends of the anode body are sealed with second epoxy resin sealant.

[0012] Further, the pre-packaged anode is buried in an anode bed under the ground.

[0013] Preferably, the negative pole of the direct current power is connected to the protected body through a cathode cable.

[0014] From the above, the anode cable is connected to the feed device from the anode body, the auxiliary anode is electrically connected to the positive pole of the power supply, the negative pole of the power supply is electrically connected to the protected body, the auxiliary anode body inputs anode current to the soil medium, the anode current flows in the soil to the protected body structure, and the protected body absorbs sufficient anode current to slow down and control corrosion.

[0015] The above description is only a summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, can be implemented according to the content of the specification, and in order to let the above and other purposes, features and advantages of the utility model can be more obvious and easy to understand, the following preferred embodiment is combined with the drawings, and is specifically described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the utility model embodiment, the drawings of the embodiment will be briefly introduced below.

[0017] Fig. 1 It is the structural schematic diagram of the auxiliary anode for cathodic protection feeder test of the utility model;

[0018] Fig. 2 It is the structural schematic diagram of the auxiliary anode for cathodic protection feeder test of the utility model;

[0019] Among them, 1. anode body;2. cable connecting piece;3. first epoxy resin sealant;4. second epoxy resin sealant;5. carbonaceous filler;6. wrapping fabric layer;7. wear-resistant woven mesh;8. binding tape;9. anode cable;10. direct current power supply;11. pre-packaged anode;12. protected body. DETAILED DESCRIPTION

[0020] The specific implementation of the utility model will be described in detail below in combination with the drawings, which is part of the specification, and the principle of the utility model is illustrated by the embodiment, and other aspects, features and advantages of the utility model will become apparent through the detailed description. In the referred drawings, the same or similar components in different drawings are indicated by the same reference numerals.

[0021] As Figs. 1-2 The auxiliary anode for cathodic protection feeder test of the utility model is connected with the pre-packaged anode 11 of the protected body 12 through the direct current power supply 10, and the pre-packaged anode 11 is buried in the anode ground bed under the ground. Among them, the pre-packaged anode 11 mainly includes anode body 1, cable connecting piece 2, first epoxy resin sealant 3, second epoxy resin sealant 4, carbonaceous filler 5, wrapping fabric layer 6, wear-resistant woven mesh 7, binding tape 8, anode cable 9.

[0022] The anode body 1 is located at the positive center of the auxiliary anode structure, that is, at the center of the pre-packaged anode 11, and the anode body 1 takes titanium tube as the base body, and the cross section of the titanium tube is circular. The surface of the titanium tube is coated with a mixed metal oxide (MMO) coating, and the size of the titanium tube is: φ25*500mm, φ25*1000mm. The mixed metal oxide anode body has the advantages of light weight, large output current density, low consumption rate and long service life.

[0023] Carbonaceous filler 5 is uniformly wrapped around the anode body 1. The carbonaceous filler 5 is composed of calcined petroleum coke powder. The carbonaceous filler 5 has the functions of increasing the anode output current, increasing the anode surface area, and reducing anode consumption.

[0024] The fabric layer 6 wraps the carbonaceous filler 5 around the anode body 1 and has a certain bursting force, wear resistance and puncture resistance. The two ends of the pre-packaged anode 11 are sealed with corrosion-resistant binding tape 8 to ensure that the carbonaceous filler 5 does not leak.

[0025] Abrasion-resistant woven mesh 7 wraps around the outside of the wrapping fabric layer 6, providing mechanical protection for the pre-packaged anode 11.

[0026] One end of the anode cable 9 is connected to the anode body 1, with the connection point located in the middle of the anode body 1 to prevent end-effects caused by anode consumption that could lead to connection failure between the anode cable 9 and the anode body 1. The anode cable 9 is fixed in the middle of the tubular anode body 1 by the cable connector 2 and sealed with a first epoxy resin sealant 3. Both ends of the anode body 1 are sealed with a second epoxy resin sealant 4. The connection between the anode cable 9 and the anode body 1 is secure and properly sealed for corrosion protection, with a waterproof rating at least meeting the requirements of GB / T4208 IPX8. The other end of the anode cable 9 is connected to the positive terminal of the DC power supply 10. The length of the pre-packaged anode 11 can be preset to 5 meters.

[0027] Below, refer to Figs. 1-2 Based on the above description of structural technical features, the working process of the auxiliary anode for cathodic protection power supply testing of this utility model is briefly described as follows:

[0028] The pre-packaged anode 11 is placed in the anode bed dug according to the design. The included anode cable 9 needs to be led out to the ground to the positive terminal of the DC power supply 10 for the power supply test. The negative terminal of the DC power supply 10 is connected to the protected body 12 through the cathode cable. After the power supply test is completed, the pre-packaged anode 11 can be dug out of the anode bed for use in the next power supply test.

[0029] The auxiliary anode for cathodic protection power supply testing of this utility model is pre-packaged, which is convenient for direct use at the power supply test site and saves the procurement and assembly of materials such as anode body, filler, and anode cable.

[0030] The above description is merely a preferred embodiment of the present utility model, and should not be construed as limiting the scope of the present utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present utility model, and these improvements and modifications are also considered to be within the scope of protection of the present utility model.

[0031] For example, in the above embodiment, the anode body 1 is a tubular mixed metal oxide anode; however, the shape of the anode body 1 is not limited thereto, and the overall shape of the anode body 1 can be adjusted according to the specific requirements of the feed test, and the anode body can also be of other shapes and materials, such as a strip-shaped mixed metal oxide anode body, a filament-shaped mixed metal oxide anode body, and a platinum anode, etc.

[0032] For example, in the above embodiment, the carbonaceous filler 5 in the auxiliary anode structure is wrapped with a fabric layer 6 and a wear-resistant woven mesh 7; however, this is not limited thereto, and other equivalent wrappings can also be used, such as a porous plastic tube or other non-metallic materials that do not hinder the output of anode current.

Claims

1. An auxiliary anode for cathodic protection power supply testing, comprising a pre-packaged anode (11) connected to the protected body (12) via a DC power supply (10), characterized in that, The pre-packaged anode (11) comprises: The anode body (1) is located at the center of the pre-packaged anode (11); Carbonaceous filler (5) is uniformly wrapped around the anode body (1); A wrapping fabric layer (6) is used to wrap the carbonaceous filler (5) around the anode body (1), and the two ends of the wrapping fabric layer (6) are sealed with straps (8); Abrasion-resistant woven mesh (7) is wrapped around the outside of the wrapping fabric layer (6) to provide mechanical protection for the pre-packaged anode (11); The anode cable (9) has one end fixed in the middle position inside the anode body (1) by a cable connector (2) and sealed with a first epoxy resin sealant (3). The other end of the anode cable (9) is connected to the positive terminal of the DC power supply (10).

2. The auxiliary anode for cathodic protection power supply test as described in claim 1, characterized in that, The substrate of the anode body (1) is a tubular titanium tube with a circular cross-section; the surface of the titanium tube is coated with a mixed metal oxide coating.

3. The auxiliary anode for cathodic protection power supply test as described in claim 1, characterized in that, The carbonaceous filler (5) includes calcined petroleum coke powder.

4. The auxiliary anode for cathodic protection power supply test as described in claim 1, characterized in that, The two ends of the anode body (1) are sealed with a second epoxy resin sealant (4).

5. The auxiliary anode for cathodic protection power supply test as described in claim 1, characterized in that, The pre-packaged anode (11) is buried in an anode bed under the ground.

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