CN209784146U - hanger device for evaluating internal corrosion and cathodic protection effects of pipeline - Google Patents
hanger device for evaluating internal corrosion and cathodic protection effects of pipeline Download PDFInfo
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- 238000004210 cathodic protection Methods 0.000 title claims abstract description 59
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- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
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- 238000011156 evaluation Methods 0.000 claims 1
- 238000012360 testing method Methods 0.000 abstract description 5
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- 238000009434 installation Methods 0.000 description 15
- 239000002609 medium Substances 0.000 description 6
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- 239000012530 fluid Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 230000004580 weight loss Effects 0.000 description 2
- 229920002292 Nylon 6 Polymers 0.000 description 1
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- 229910010272 inorganic material Inorganic materials 0.000 description 1
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Abstract
本实用新型涉及及管道腐蚀测试技术领域，且公开了一种评价管道内腐蚀及阴极保护效果的挂片装置，包括空心的安装基座，所述安装基座的内部螺纹连接有金属支架，所述金属支架的底部通过连接螺栓固定连接有腐蚀挂片和阴极保护挂片，所述腐蚀挂片和金属支架之间设置有绝缘垫片，所述阴极保护挂片和金属支架之间设置有金属垫片，所述金属支架的外壁套接有绝缘套。本实用新型通过同时在管道的内部设置腐蚀挂片和阴极保护挂片，可以利用腐蚀挂片测量管道内壁的自然腐蚀速率，阴极保护挂片测量受阴极保护状态下的腐蚀速率。
The utility model relates to the technical field of pipeline corrosion testing, and discloses a hanging chip device for evaluating pipeline internal corrosion and cathodic protection effect, which comprises a hollow mounting base, and the internal thread of the mounting base is connected with a metal bracket. The bottom of the metal bracket is fixedly connected with a corrosion coupon and a cathodic protection coupon through connecting bolts, an insulating gasket is arranged between the corrosion coupon and the metal bracket, and a metal gasket is arranged between the cathodic protection coupon and the metal bracket. Gasket, the outer wall of the metal bracket is sleeved with an insulating sleeve. The utility model can use the corrosion coupon to measure the natural corrosion rate of the inner wall of the pipeline by simultaneously setting the corrosion coupon and the cathodic protection coupon inside the pipeline, and the cathodic protection coupon can measure the corrosion rate under cathodic protection.
Description
技术领域technical field
本实用新型涉及管道腐蚀测试技术领域，尤其涉及一种评价管道内腐蚀及阴极保护效果的挂片装置。The utility model relates to the technical field of pipeline corrosion testing, in particular to a hanging chip device for evaluating pipeline internal corrosion and cathodic protection effect.
背景技术Background technique
在石油行业中，金属管道作为油气输送的重要通道，其安全高效运行对于安全生产有着重要的意义。而管道在含水的输送介质的过程中，介质中含有的腐蚀性成分常常会对管道造成腐蚀，当管道内壁被腐蚀到一定程度后，随着管道壁厚越来越薄，会产生泄漏或破裂，影响油田的安全生产。In the petroleum industry, metal pipelines are an important channel for oil and gas transportation, and their safe and efficient operation is of great significance to safe production. In the process of pipelines transporting medium containing water, the corrosive components contained in the medium often cause corrosion to the pipeline. When the inner wall of the pipeline is corroded to a certain extent, as the wall thickness of the pipeline becomes thinner, leakage or rupture will occur. , affecting the safe production of the oil field.
为减缓腐蚀管道内壁的腐蚀，通常可以在管道内壁施加防腐层、在工艺中增加缓蚀剂等药剂来减缓腐蚀，但在一些特殊的部位如三通、弯头等位置采用内置牺牲阳极或外加电流阴极保护系统可以达到更好的防腐效果。In order to slow down the corrosion of the inner wall of the corroded pipeline, it is usually possible to apply an anti-corrosion layer on the inner wall of the pipeline and add corrosion inhibitors and other agents in the process to slow down the corrosion. However, in some special parts such as tees and elbows, built-in sacrificial anodes or external current Cathodic protection system can achieve better anti-corrosion effect.
为评价腐蚀及防腐效果，一般采取腐蚀监测的手段。目前管道内壁常用的腐蚀监测方法有电阻探针法、线性极化电阻法、挂片失重法等。电阻探针法即将探针插入管道内部与输送介质接触，根据探针的电阻变化折算金属损失量，进而推算腐蚀速率，该方法广泛用于各种腐蚀环境，但获取数据时间较长，探针寿命短，在使用内置无法中断电流的牺牲阳极阴极保护系统时阴极保护电流会影响测量结果。线性极化电阻法即根据腐蚀电流进行推算腐蚀速率，该方法可随时读取数据，但工作环境要求严格，不能用于对电极造成污染的环境，且该方法属于电化学方法，在阴极保护条件下无法使用。挂片失重法即将与生产管道相同材质的试片插入管道内部，经过一段时间后根据腐蚀前后的重量推算腐蚀速率，该方法投资较少，测试结果准确，适用于各种环境，作为各种内腐蚀测量方法中较有效的方法，能够直接地反映腐蚀状况或防腐效果，广泛应用于油气田管道上。In order to evaluate the corrosion and anti-corrosion effect, the means of corrosion monitoring are generally adopted. At present, the commonly used corrosion monitoring methods on the inner wall of the pipeline include the resistance probe method, the linear polarization resistance method, and the coupon weight loss method. The resistance probe method is to insert the probe into the pipeline to contact the conveying medium, convert the amount of metal loss according to the resistance change of the probe, and then calculate the corrosion rate. This method is widely used in various corrosive environments, but it takes a long time to obtain data. The life is short, and the cathodic protection current will affect the measurement results when using the sacrificial anode cathodic protection system with built-in current that cannot be interrupted. The linear polarization resistance method is to calculate the corrosion rate according to the corrosion current. This method can read the data at any time, but the working environment is strict and cannot be used in an environment that pollutes the electrodes. This method is an electrochemical method. unavailable. The hanging piece weight loss method is to insert a test piece of the same material as the production pipeline into the inside of the pipeline. After a period of time, the corrosion rate is calculated according to the weight before and after corrosion. This method requires less investment and accurate test results. It is suitable for various environments. The more effective method in the corrosion measurement method can directly reflect the corrosion status or anticorrosion effect, and is widely used in oil and gas field pipelines.
在采用内置阴极保护的管道中，常常需要测量管道内自然腐蚀速率及有阴极保护情况下的腐蚀速率，用于评价介质腐蚀性和阴极保护防腐效果，而常用的腐蚀挂片装置只能单一的测量自然腐蚀速率。若要了解自然状况和加入阴极保护状况下的腐蚀速率时，则需要分别测量或者多加一组测量装置，这无疑增加了操作的难度和时间。In pipelines with built-in cathodic protection, it is often necessary to measure the natural corrosion rate in the pipeline and the corrosion rate under the condition of cathodic protection to evaluate the corrosion of the medium and the anticorrosion effect of cathodic protection. Measure the natural corrosion rate. If you want to know the corrosion rate under natural conditions and cathodic protection conditions, you need to measure separately or add a set of measuring devices, which undoubtedly increases the difficulty and time of the operation.
实用新型内容Utility model content
本实用新型的目的是为了解决现有技术中当需要了解自然状况和加入阴极保护状况下的腐蚀速率时，则需要分别测量或者多加一组测量装置，增加了操作的难度和时间的问题，而提出的一种评价管道内腐蚀及阴极保护效果的挂片装置。The purpose of this utility model is to solve the problem in the prior art that when it is necessary to understand the natural conditions and the corrosion rate under the condition of cathodic protection, it is necessary to measure separately or add a group of measuring devices, which increases the difficulty and time of operation, and A coupon device for evaluating pipeline internal corrosion and cathodic protection effect is proposed.
为了实现上述目的，本实用新型采用了如下技术方案：In order to achieve the above object, the utility model adopts the following technical solutions:
一种评价管道内腐蚀及阴极保护效果的挂片装置，包括空心的安装基座，所述安装基座的内部螺纹连接有金属支架，所述金属支架的底部通过连接螺栓固定连接有腐蚀挂片和阴极保护挂片，所述腐蚀挂片和金属支架之间设置有绝缘垫片，所述阴极保护挂片和金属支架之间设置有金属垫片，所述金属支架的外壁套接有绝缘套。A coupon device for evaluating pipeline internal corrosion and cathodic protection effect, comprising a hollow installation base, the inner thread of the installation base is connected with a metal bracket, and the bottom of the metal bracket is fixedly connected with a corrosion coupon by connecting bolts and a cathodic protection coupon, an insulating gasket is arranged between the corrosion coupon and the metal bracket, a metal gasket is arranged between the cathodic protection coupon and the metal bracket, and an insulating sleeve is sleeved on the outer wall of the metal bracket .
优选的，所述安装基座的顶部螺纹连接有保护盖。Preferably, a protective cover is threadedly connected to the top of the installation base.
优选的，所述连接螺栓为绝缘材质。Preferably, the connecting bolts are made of insulating material.
优选的，所述金属支架为不锈钢材质。Preferably, the metal bracket is made of stainless steel.
优选的，所述金属支架的顶部设置有与腐蚀挂片平行的标识块，所述腐蚀挂片与阴极保护挂片平行设置。Preferably, the top of the metal bracket is provided with an identification block parallel to the corrosion coupon, and the corrosion coupon is arranged parallel to the cathodic protection coupon.
与现有技术相比，本实用新型提供了一种评价管道内腐蚀及阴极保护效果的挂片装置，具备以下有益效果：Compared with the prior art, the utility model provides a hanging plate device for evaluating the corrosion and cathodic protection effect in the pipeline, which has the following beneficial effects:
1、该评价管道内腐蚀及阴极保护效果的挂片装置，通过同时在管道的内部设置腐蚀挂片和阴极保护挂片，可以利用腐蚀挂片测量管道内壁的自然腐蚀速率，阴极保护挂片测量受阴极保护状态下的腐蚀速率，大大降低了操作难度和操作时间。1. The coupon device for evaluating the corrosion and cathodic protection effect in the pipeline can use the corrosion coupon to measure the natural corrosion rate of the inner wall of the pipeline by setting the corrosion coupon and the cathodic protection coupon inside the pipeline at the same time, and the cathodic protection coupon to measure The corrosion rate under the state of cathodic protection greatly reduces the operation difficulty and operation time.
该装置中未涉及部分均与现有技术相同或可采用现有技术加以实现，本实用新型通过同时在管道的内部设置腐蚀挂片和阴极保护挂片，可以利用腐蚀挂片测量管道内壁的自然腐蚀速率，阴极保护挂片测量受阴极保护状态下的腐蚀速率。The parts not involved in the device are the same as the existing technology or can be realized by using the existing technology. The utility model can use the corrosion coupon to measure the natural Corrosion Rate, Cathodic Protection Coupon measures the corrosion rate in the cathodically protected state.
附图说明Description of drawings
图1为本实用新型提出的一种评价管道内腐蚀及阴极保护效果的挂片装置的结构示意图；Fig. 1 is the structural representation of a kind of hanging piece device that evaluates pipeline inner corrosion and cathodic protection effect that the utility model proposes;
图2为本实用新型提出的一种评价管道内腐蚀及阴极保护效果的挂片装置A部分的结构示意图。Fig. 2 is a structural schematic diagram of part A of a hanging plate device for evaluating pipeline internal corrosion and cathodic protection effect proposed by the utility model.
图中：1保护盖、2安装基座、3金属支架、4绝缘套、5绝缘垫片、6连接螺栓、7腐蚀挂片、8金属垫片、9阴极保护挂片、10标识块、11管道。In the figure: 1 protective cover, 2 installation base, 3 metal bracket, 4 insulating sleeve, 5 insulating gasket, 6 connecting bolt, 7 corrosion coupon, 8 metal gasket, 9 cathodic protection coupon, 10 identification block, 11 pipeline.
具体实施方式Detailed ways
下面将结合本实用新型实施例中的附图，对本实用新型实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本实用新型一部分实施例，而不是全部的实施例。The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example.
在本实用新型的描述中，需要理解的是，术语“上”、“下”、“前”、“后”、“左”、“右”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本实用新型和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本实用新型的限制。In describing the present utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", The orientation or positional relationship indicated by "outside" is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation , are constructed and operated in a specific orientation and therefore cannot be construed as limiting the invention.
参照图1-2，一种评价管道内腐蚀及阴极保护效果的挂片装置，包括空心的安装基座2，安装基座2为金属材质，安装基座2可以焊接在管道11外部或通过法兰固定连接在管道11上，其中法兰连接的方式，便于日后对安装基座2进行维护，安装基座2的内部螺纹连接有金属支架3，金属支架3的底部通过连接螺栓6固定连接有腐蚀挂片7和阴极保护挂片9，管道11上开设有与金属支架3相匹配的通孔，金属支架3通过该通孔插入管道11的内部，腐蚀挂片7和金属支架3之间设置有绝缘垫片5，绝缘垫片5采用有机或无机的材质，如聚丙烯材质或陶瓷材质，阴极保护挂片9和金属支架3之间设置有金属垫片8，金属支架3的外壁套接有绝缘套4，绝缘套4采用尼龙6等材质，以防止金属支架吸收阴极保护电流，且保护支架不受管道内流动介质腐蚀及冲刷，绝缘套4上会设置与金属垫片8相对应的避位，使得金属垫片8能与金属支架3相接触，连接螺栓6为绝缘材质，可以采用无机陶瓷或有机的聚丙烯材质，具有绝缘、防腐蚀和耐高温的性能，金属支架3为不锈钢材质，其耐腐蚀性与导电性能在管道输送介质下稳定工作且能保证阴极保护电流通过，腐蚀挂片7与金属管道间电绝缘，用于测量管道内壁自然腐蚀速率；阴极保护挂片9接收阴极保护电流以测量在阴极保护条件下该挂片的腐蚀速率，在以上装置安装完成后，在安装基座2上盖上保护盖1即安装完毕，在给管道内壁施加阴极保护一段时间后(通常为2个月或更长时间)取出两个挂片，对比两个挂片腐蚀情况，基于保护效果进一步改善管道内壁防腐对策。Referring to Fig. 1-2, a hanger device for evaluating the corrosion and cathodic protection effect in pipelines includes a hollow installation base 2, which is made of metal, and the installation base 2 can be welded on the outside of the pipeline 11 or through a method. The flange is fixedly connected to the pipeline 11, and the way of flange connection is convenient for maintenance of the installation base 2 in the future. The internal thread of the installation base 2 is connected with a metal bracket 3, and the bottom of the metal bracket 3 is fixedly connected with a connecting bolt 6. The corrosion coupon 7 and the cathodic protection coupon 9 are provided with a through hole matching the metal bracket 3 on the pipeline 11, and the metal bracket 3 is inserted into the inside of the pipeline 11 through the through hole, and the corrosion coupon 7 and the metal bracket 3 are provided There is an insulating gasket 5, the insulating gasket 5 is made of organic or inorganic material, such as polypropylene or ceramic material, a metal gasket 8 is arranged between the cathodic protection hanging piece 9 and the metal bracket 3, and the outer wall of the metal bracket 3 is socketed There is an insulating sleeve 4, which is made of nylon 6 and other materials to prevent the metal bracket from absorbing cathodic protection current, and to protect the bracket from corrosion and erosion by the flowing medium in the pipeline. evasion, so that the metal gasket 8 can be in contact with the metal bracket 3, the connecting bolt 6 is made of insulating material, and can be made of inorganic ceramics or organic polypropylene material, which has the properties of insulation, corrosion resistance and high temperature resistance, and the metal bracket 3 is stainless steel material, its corrosion resistance and electrical conductivity can work stably under the pipeline transport medium and can ensure the passage of cathodic protection current, the corrosion coupon 7 is electrically insulated from the metal pipeline, and is used to measure the natural corrosion rate of the inner wall of the pipeline; the cathodic protection coupon 9 receives The cathodic protection current is used to measure the corrosion rate of the coupon under cathodic protection conditions. After the installation of the above devices is completed, the protective cover 1 is placed on the installation base 2 and the installation is completed. After applying cathodic protection to the inner wall of the pipeline for a period of time ( Usually 2 months or longer) Take out two coupons, compare the corrosion of the two coupons, and further improve the anti-corrosion countermeasures for the inner wall of the pipeline based on the protection effect.
金属支架3的顶部设置有与腐蚀挂片7平行的标识块10，腐蚀挂片7与阴极保护挂片9平行设置，可以在安装时，旋转调整金属支架3使腐蚀挂片7和阴极保护挂片9与管道内流体流向平行，避免腐蚀挂片7和阴极保护挂片9阻挡流体流动。The top of the metal bracket 3 is provided with an identification block 10 parallel to the corrosion coupon 7, and the corrosion coupon 7 is arranged parallel to the cathodic protection coupon 9. When installing, the metal bracket 3 can be rotated and adjusted to make the corrosion coupon 7 and the cathodic protection coupon The sheet 9 is parallel to the flow direction of the fluid in the pipeline, so as to prevent the corrosion coupon 7 and the cathodic protection coupon 9 from blocking the fluid flow.
本实用新型中，通过在管道11上固定设置安装基座，并通过安装基座2将带有腐蚀挂片7和阴极保护挂片9的金属支架3安装并插入管道11的内部，其中腐蚀挂片7使用绝缘垫片5，阴极保护挂片9使用导电的金属垫片8，以此形成腐蚀挂片7与金属支架3绝缘，测量介质下的自然腐蚀速率；阴极保护挂片9接收阴极保护电流，由于安装基座2、金属支架3、金属垫片3与阴极保护挂片9存在电连接，管道11内壁的保护电流先后通过安装基座2、金属支架3、金属垫片8到达阴极保护挂片9，测量该挂片受阴极保护状态下的腐蚀速率，两个不同功能的挂片，不仅能了解管道11内部在未保护和保护状态下的腐蚀状况，还能够对比同一测试时段下管道11内部自然腐蚀状况与受阴极保护的腐蚀状况，根据对比分析有针对性地改善管道11内壁腐蚀防护对策，提高阴极保护效率。In the utility model, the installation base is fixedly arranged on the pipeline 11, and the metal bracket 3 with the corrosion hanger 7 and the cathodic protection hanger 9 is installed and inserted into the inside of the pipeline 11 through the installation base 2, wherein the corrosion hanger Sheet 7 uses insulating gasket 5, and cathodic protection coupon 9 uses conductive metal gasket 8, so as to form corrosion coupon 7 and metal support 3 insulation, and measure the natural corrosion rate under the medium; cathodic protection coupon 9 receives cathodic protection Current, due to the electrical connection between the installation base 2, the metal bracket 3, the metal gasket 3 and the cathodic protection coupon 9, the protection current on the inner wall of the pipeline 11 successively passes through the installation base 2, the metal bracket 3, and the metal gasket 8 to reach the cathodic protection Coupon 9 is used to measure the corrosion rate of the coupon under the state of cathodic protection. Two coupons with different functions can not only understand the corrosion status of the inside of the pipeline 11 under unprotected and protected conditions, but also compare the corrosion rate of the pipeline under the same test period. According to the comparative analysis of the internal natural corrosion status of 11 and the corrosion status protected by cathodic protection, the countermeasures for corrosion protection of the inner wall of pipeline 11 are targeted to improve the efficiency of cathodic protection.
以上所述，仅为本实用新型较佳的具体实施方式，但本实用新型的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本实用新型揭露的技术范围内，根据本实用新型的技术方案及其实用新型构思加以等同替换或改变，都应涵盖在本实用新型的保护范围之内。The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto. The equivalent replacement or change of the new technical solution and the concept of the utility model shall be covered by the protection scope of the utility model.
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