CN211112230U

CN211112230U - Pipeline inner wall corrosion prevention device for nuclear power plant

Info

Publication number: CN211112230U
Application number: CN201921560468.0U
Authority: CN
Inventors: 胡明磊; 张维; 赵卫东; 方江; 黄磊; 蒋益丰; 富敏; 江锋
Original assignee: CNNC Nuclear Power Operation Management Co Ltd; Nuclear Power Qinshan Joint Venture Co Ltd
Current assignee: CNNC Nuclear Power Operation Management Co Ltd; Nuclear Power Qinshan Joint Venture Co Ltd
Priority date: 2019-09-19
Filing date: 2019-09-19
Publication date: 2020-07-28
Anticipated expiration: 2029-09-19

Abstract

The utility model belongs to the technical field of the operation maintenance of nuclear power plant, concretely relates to pipeline inner wall anti-corrosion device for nuclear power plant. The device 1 comprises a front cover 1 and a rear cover 9 which are arranged at two ends of a pipeline 13, and a vapor phase inhibitor is filled in the pipeline 13; the front cover (1) is connected with an air inlet pipe (2), and the air inlet pipe (2) is provided with an air inlet check valve (3); the rear cover (9) is connected with an air outlet pipe (10), and an air outlet check valve (11) is arranged on the air outlet pipe (10). Adopt the utility model discloses a carbon steel pipeline that anticorrosion device deposited in to nuclear power plant's warehouse protects, and the pipeline inner wall that can effectively guarantee to deposit for a long time does not take place to corrode, can directly use when the scene needs. Simultaneously, this device has simple structure, convenient to use's advantage to can use repeatedly to the same batch pipeline that the pipe diameter is the same, be favorable to reducing nuclear power plant operation and maintenance cost.

Description

Pipeline inner wall corrosion prevention device for nuclear power plant

Technical Field

The utility model belongs to the technical field of the operation maintenance of nuclear power plant, concretely relates to pipeline inner wall anti-corrosion device for nuclear power plant.

Background

In a nuclear power plant warehouse, a large number of carbon steel pipelines exist, the inside and the outside of the carbon steel pipelines are not provided with anti-corrosion measures, and the carbon steel pipelines are generally placed outdoors due to the large number of pipelines, and metal is directly exposed in the air. The corrosion degree is increased in the atmospheric environment for a long time, and the serious direct scrapping of individual corrosion causes great waste. The pipeline stored in the warehouse is generally subjected to rust removal operation before use, the rust removal of the outside of the pipeline is usually simpler and can be performed through ordinary polishing, but the rust removal of the inner wall of the pipeline is troublesome to operate. Some pipelines have smaller inner diameters, and personnel cannot enter the pipelines, and the pipelines have certain lengths, so that tools in a power plant basically cannot realize the rust removal operation on the inner walls of the pipelines. Some power plants can transport large batches of pipelines to an external factory for internal sand blasting and rust removal, and the method is time-consuming and labor-consuming. If the corrosion of the inner wall of the pipeline is slight, the pipeline is directly pulled to a field for use, the corrosion product inside the pipeline inevitably causes certain influence on a power plant system, the safety performance of the pipeline is reduced, and hidden dangers are buried for the safe operation of a unit. Therefore, in order to solve the problem of corrosion of the inner wall of the pipeline in the warehouse, the invention of the pipeline inner wall anticorrosion device in the atmospheric environment is urgently needed, so that the inner wall of the pipeline stored for a long time is ensured not to be corroded, and the pipeline inner wall anticorrosion device can be directly used when needed on site.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a nuclear power plant uses pipeline inner wall corrosion prevention device in order to prevent that the pipeline inner wall from producing the problem of corrosion.

The technical scheme of the utility model as follows:

An anticorrosion device for the inner wall of a pipeline for a nuclear power plant comprises a front cover and a rear cover which are arranged at two ends of the pipeline, wherein a vapor phase corrosion inhibitor is filled in the pipeline; the front cover is connected with an air inlet pipe, and an air inlet check valve is arranged on the air inlet pipe; the rear cover is connected with an air outlet pipe, and an air outlet check valve is arranged on the air outlet pipe.

An air pressure sensor is further mounted on the inner side of the front cover, and data received by the air pressure sensor is displayed on a display screen on the outer side of the front cover.

The front cover and the rear cover are connected with the pipeline in a threaded or socket joint mode, and sealant is uniformly coated at the joints of the front cover and the pipeline and the joints of the rear cover and the pipeline.

A temperature sensor and a humidity sensor are further mounted on the inner side of the front cover, and received data are displayed on a liquid crystal display screen on the outer side of the front cover.

And a battery jar is arranged below the liquid crystal display and is provided with a battery to provide power for the liquid crystal display and other devices.

The front cover and the rear cover are both made of stainless steel 304.

The vapor phase corrosion inhibitor is dry nitrogen.

The pressure range of the gas in the pipeline is 0.11-0.13 Mpa.

The beneficial effects of the utility model reside in that:

The utility model discloses a device passes through the intake pipe and toward the inside gaseous phase inhibitor that carries of pipeline, will originally discharge through the inside air of outlet duct simultaneously, treat that the pipeline is inside to be full of the check valve at both ends after the air inhibitor to reach the effect that prevents the pipeline inner wall corruption. Meanwhile, the temperature, the humidity and the pressure inside the pipeline can be monitored through data on the display, and the inner wall of the pipeline is protected in an all-around mode. Adopt the utility model discloses a carbon steel pipeline that anticorrosion device deposited in to nuclear power plant's warehouse protects, and the pipeline inner wall that can effectively guarantee to deposit for a long time does not take place to corrode, can directly use when the scene needs. Simultaneously, this device has simple structure, convenient to use's advantage to can use repeatedly to the same batch pipeline that the pipe diameter is the same, be favorable to reducing nuclear power plant operation and maintenance cost.

Drawings

FIG. 1 is a schematic view of the outer surface shape of the front cover of the present invention;

FIG. 2 is a schematic view of the inner surface shape of the front cover of the present invention;

FIG. 3 is a schematic view of the outer surface shape of the rear cover of the present invention;

FIG. 4 is a schematic view of the inner surface shape of the rear cover of the present invention;

FIG. 5 is a schematic view of the overall structure of the present invention;

FIG. 6 is a half sectional view of FIG. 5;

In the figure: 1-a front cover; 2, an air inlet pipe; 3-an air intake check valve; 4-a display screen; 5-a battery jar; 6-temperature sensor; 7-a humidity sensor; 8-a barometric sensor; 9-rear cover; 10-air outlet pipe; 11-air outlet check valve; 12-the inner wall of the cylinder body of the front cover 1; 13-pipeline.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The embodiment provides a pipeline inner wall anticorrosion device for a nuclear power plant, which has a structure shown in figures 1 to 6, and mainly comprises a front cover 1 and a rear cover 9 which are arranged at two ends of a pipeline 13, wherein a gas phase corrosion inhibitor is filled in the pipeline 13.

The front cover 1 is in a cylindrical structure with one end sealed as shown in fig. 1 and fig. 2, the inner diameter of the front cover is matched with the outer diameter of the pipeline 13, and the front cover can be connected with the pipeline 13 through threads or can be installed in a socket mode; sealant is uniformly coated on the inner wall 12 of the front cover cylinder in a circle for realizing the gas sealing in the pipeline 13.

The outer surface of the bottom of the front cover 1 is connected with an air inlet pipe 2, and an air inlet check valve 3 is installed on the air inlet pipe 2. The inner side of the front cover 1 is also provided with a temperature sensor 6, a humidity sensor 7 and a pressure sensor 8, and data received by the three sensors are displayed on the liquid crystal display screen 4 on the outer side of the front cover 1. A battery jar 5 is arranged below the liquid crystal screen 4, and an internal battery can provide power for the whole device.

The structure of the rear cover 9 is similar to the whole structure of the front cover 1, as shown in fig. 3 and 4, the rear cover is also a cylindrical structure with one end sealed, the inner diameter of the rear cover is matched with the outer diameter of the pipeline 13, the rear cover can be connected with the pipeline 13 through threads, and the rear cover can also be installed in a socket mode; and sealant is uniformly coated on the inner wall of the cylinder body of the rear cover 9 for one circle for realizing the gas sealing in the pipeline 13. The rear cover 9 is connected with an air outlet pipe 10, and an air outlet check valve 11 is arranged on the upper surface.

The main components of the whole device are made of stainless steel 304, so that the device has high strength and good corrosion resistance. The device can be manufactured according to the sizes of different pipelines so as to be applied to pipelines with different specifications. As shown in fig. 6, the front cover 1 and the rear cover 9 may be inserted into the front end and the rear end of the pipeline 13 to be protected in a socket manner, and the inner walls of the front cover 1 and the rear cover 9 are sealed by a sealant.

As shown in fig. 5 and 6, when the device is used, firstly, a front cover 1 and a rear cover 9 are arranged at the front and rear positions of a pipeline 13 to be protected in a socket way; then, respectively opening an air inlet check valve 3 and an air outlet check valve 11 on the air inlet pipe 2 and the air outlet pipe 10; subsequently, the gaseous corrosion inhibitor is conveyed into the pipeline 13 through the air inlet pipe 2, meanwhile, air in the pipeline 13 is extruded out of the pipeline 13 through the air outlet pipe 10, and after sufficient time, the check valves on the two sides are closed after the pipeline 13 is filled with the gaseous corrosion inhibitor. In this embodiment, the pressure range of the gas in the pipe 13 is controlled to be 0.11 to 0.13Mpa, which enables the storage effect to be better.

Through the steps, the inner wall of the pipeline 13 can be directly immersed in the vapor phase corrosion inhibitor, so that the purpose of corrosion prevention is achieved. Through the data on the display screen 4, the internal state of the pipeline 13 can be monitored in real time, and once the internal pressure drop is found, the vapor phase corrosion inhibitor can be supplemented in time. The power of the whole device is provided by the battery in the battery tank 5, and the use is convenient.

The vapor phase inhibitor used in this embodiment is dry nitrogen, and other vapor phase inhibitors having the same effect may also be used.

Adopt this embodiment anticorrosive device, the pipeline inner wall that can effectively guarantee to deposit for a long time does not take place to corrode, can directly use when the on-the-spot needs. Simultaneously, this device has simple structure, convenient to use's advantage to can use repeatedly to the same batch pipeline that the pipe diameter is the same, be favorable to reducing nuclear power plant operation and maintenance cost.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims

1. The utility model provides a pipeline inner wall anticorrosive device for nuclear power plant which characterized in that: comprises a front cover (1) and a rear cover (9) which are arranged at two ends of a pipeline (13), wherein a vapor phase corrosion inhibitor is filled in the pipeline (13); the front cover (1) is connected with an air inlet pipe (2), and the air inlet pipe (2) is provided with an air inlet check valve (3); the rear cover (9) is connected with an air outlet pipe (10), and an air outlet check valve (11) is arranged on the air outlet pipe (10).

2. The corrosion prevention device for the inner wall of the pipeline for the nuclear power plant as recited in claim 1, wherein: an air pressure sensor (8) is further mounted on the inner side of the front cover (1), and data received by the air pressure sensor (8) are displayed on a display screen (4) on the outer side of the front cover (1).

3. The corrosion prevention device for the inner wall of the pipeline for the nuclear power plant as recited in claim 1, wherein: the front cover (1) and the rear cover (9) are connected with the pipeline (13) in a threaded or socket-and-spigot mode, and sealant is uniformly coated at the joint of the front cover (1) and the rear cover (9) and the pipeline (13).

4. The corrosion prevention device for the inner wall of the pipeline for the nuclear power plant as claimed in claim 1 or 2, wherein: the inner side of the front cover (1) is also provided with a temperature sensor (6) and a humidity sensor (7), and received data are displayed on a display screen (4) on the outer side of the front cover (1).

5. The corrosion prevention device for the inner wall of the pipeline for the nuclear power plant as set forth in claim 4, wherein: a battery groove (5) is arranged below the display screen (4), and a battery is installed to provide power for the display screen (4) and other devices.

6. The corrosion prevention device for the inner wall of the pipeline for the nuclear power plant as set forth in claim 4, wherein: the front cover (1) and the rear cover (9) are both made of stainless steel 304.

7. The corrosion prevention device for the inner wall of the pipeline for the nuclear power plant as set forth in claim 4, wherein: the vapor phase corrosion inhibitor is dry nitrogen.

8. The corrosion prevention device for the inner wall of the pipeline for the nuclear power plant as recited in claim 7, wherein: the gas pressure range in the pipeline (13) is 0.11-0.13 Mpa.