CN106290723A - Gas leakage monitoring system - Google Patents

Abstract

The invention provides a kind of gas leakage monitoring system, this supervision subjects includes: supervision subjects, and supervision subjects is internally provided with monitoring space, is provided with transformator in monitoring space；Level monitoring portion, level monitoring portion is arranged in monitoring space, the gas of the horizontal direction distribution in monitoring space；Vertically monitoring portion, vertical monitoring portion is arranged in monitoring space, the gas of the vertical direction distribution in monitoring space.The gas being in monitoring space can either be monitored by the gas leakage monitoring system of the present invention from horizontal direction, can be monitored, from vertical direction, the gas being in monitoring space again, it is achieved that to the three-dimensional monitoring in monitoring space.

Description

Gas Leakage Monitoring System

technical field

The invention relates to the field of gas monitoring equipment, in particular to a gas leakage monitoring system.

Background technique

With the development of urbanization in China, the population of big cities is more dense, there are many high-rise buildings, the power consumption is increasing sharply, and the number of transformers is also increasing. The traditional large-capacity oil-immersed transformer has a large amount of oil. Once it catches fire due to a fault, it will damage the High-rise buildings and people's lives and properties pose a serious threat. Therefore, sulfur hexafluoride insulating transformers have been widely used in urban underground substations in China since the 1960s. Compared with traditional oil-filled transformers, SF ₆ transformers have obvious advantages: due to the non-combustible and non-combustible nature of SF ₆ Combustibility, SF ₆ gas has no fire potential and low noise, especially suitable for use in bustling commercial centers and densely populated residential areas.

Although the insulating performance of SF ₆ gas is superior, it must be subject to strict quality supervision and safety management according to the requirements of relevant regulations. This is because SF ₆ gas will decompose and produce some toxic or even highly toxic and highly corrosive harmful impurities during its production process or under the action of high-energy factors. When there is moisture, air (oxygen), electrode materials, and equipment materials in the system etc., it will lead to the complication of the decomposition process, resulting in a significant increase in the number and types of decomposition products, and their harmfulness is also significantly increased.

The leakage of SF ₆ gas in sulfur hexafluoride insulated transformers is unavoidable due to the manufacturing quality, installation process, aging of sealing components and inflation pressure of sulfur hexafluoride insulated transformers. Once the sulfur hexafluoride insulating transformer leaks, the sulfur hexafluoride gas in it will escape in large quantities, and the leaked SF ₆ gas and its decomposition products will accumulate in the lower indoor space, causing local hypoxia and poisoning. It will cause serious damage to the health of the maintenance and inspection personnel who enter the room. Therefore, installing accurate and effective SF ₆ gas monitoring equipment will help to take emergency maintenance measures in time to avoid personal and secondary injuries.

The relevant standards of my country's electric power industry put forward strict monitoring measures for the indoor environment of sulfur hexafluoride insulated electrical equipment to prevent vicious accidents. For example, the "Electricity Safety Work Regulations" (electrical parts of power plants and substations) and DL/T639-1997 "Safety Protection Rules for Sulfur Hexafluoride Electrical Equipment Operation, Test and Maintenance Personnel" specifically stipulate that when SF ₆ gas is filled indoors, work The SF ₆ gas content in the air in the area shall not exceed 1000μL/L. In addition to installing a strong ventilation device, an SF ₆ gas leakage online monitoring and alarm system must be installed to provide personal health and safety protection for the staff.

When the instantaneous leakage of SF ₆ is large, the content of SF ₆ will be in a high state for a long time within the height range of _0.5-3m . ₆ distribution.

Contents of the invention

The main purpose of the present invention is to provide a gas leakage monitoring device to solve the problem that the SF ₆ monitoring system in the prior art cannot monitor three-dimensionally.

In order to achieve the above object, the present invention provides a gas leakage monitoring system, the monitoring body includes: a monitoring body, a monitoring space is set inside the monitoring body, a transformer is installed in the monitoring space; a level monitoring part, the level monitoring part is installed in the monitoring In the space, it is used to monitor the gas distributed in the horizontal direction in the monitoring space; the vertical monitoring unit is installed in the monitoring space, and is used to monitor the gas distributed in the vertical direction in the monitoring space.

Further, the level monitoring part includes a plurality of first sensors, and the plurality of first sensors are arranged at intervals along the horizontal direction on the side wall of the monitoring body.

Further, the vertical monitoring part includes a plurality of second sensors, and the plurality of second sensors are arranged at intervals on the side wall of the monitoring body perpendicular to the horizontal direction.

Further, there are multiple horizontal monitoring sections, and the multiple horizontal monitoring sections are arranged along the extending direction of the vertical monitoring section.

Further, the minimum distance between the plurality of horizontal monitoring parts and the bottom of the monitoring body is 20 cm.

Further, the distance between two adjacent second sensors is 50 cm.

Further, both the first sensor and the second sensor are SF ₆ sensors.

Further, the gas leakage monitoring system further includes a sensing part installed on the side wall of the monitoring body for monitoring the oxygen concentration and temperature and humidity in the monitoring space.

Further, the distance between the sensing part and the bottom of the monitoring body is 160 cm.

Further, the sensing part includes an oxygen sensor for sensing oxygen concentration and a temperature and humidity sensor for sensing temperature and humidity.

Applying the technical solution of the present invention, the gas leakage monitoring system of the present invention can monitor the gas in the monitoring space from the horizontal direction, and can monitor the gas in the monitoring space from the vertical direction, realizing the monitoring of the monitoring space. The three-dimensional monitoring in the monitoring space makes the monitoring of the gas in the monitoring space, especially the SF ₆ gas, more effective and accurate.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide a further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached picture:

Fig. 1 schematically shows the overall structure of the gas leakage monitoring system of the present invention.

Wherein, the above-mentioned accompanying drawings include the following reference signs:

10. Monitoring main body; 21. First sensor; 22. Second sensor; 30. Sensing part.

detailed description

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.

It should be noted that the terms "first" and "second" in the specification and claims of the present application and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific order or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or described herein.

Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

For the convenience of description, spatially relative terms may be used here, such as "on ...", "over ...", "on the surface of ...", "above", etc., to describe the The spatial positional relationship between one device or feature shown and other devices or features. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.

For example, if the device in the figures is turned over, devices described as "above" or "above" other devices or configurations would then be oriented "beneath" or "above" the other devices or configurations. under other devices or configurations". Thus, the exemplary term "above" can encompass both an orientation of "above" and "beneath". The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptions used herein interpreted accordingly.

As mentioned in the background technology, when the instantaneous leakage of SF ₆ is large, the SF ₆ content will be in a high state for a long time within the height range of 0.5-3m. At this time, if only SF ₆ sensors are installed on the horizontal surface, it will not be effective Monitor the distribution of SF ₆ in space at the time of a large leak. Referring to Fig. 1, the present invention provides a gas leakage monitoring system. The gas leakage monitoring system includes a monitoring body 10, a horizontal monitoring part and a vertical monitoring part, wherein a monitoring space is provided inside the monitoring body 10, and the monitoring space A transformer is installed, the horizontal monitoring unit is installed in the monitoring space for monitoring the gas distributed in the horizontal direction in the monitoring space, and the vertical monitoring unit is installed in the monitoring space for monitoring the gas distributed in the vertical direction in the monitoring space. When working, the gas leakage monitoring system of the present invention can not only monitor the gas in the monitoring space from the horizontal direction, but also monitor the gas in the monitoring space from the vertical direction, realizing the three-dimensional monitoring of the monitoring space. Monitoring, so that the gas in the monitoring space, especially the monitoring of SF ₆ is more effective and accurate.

Specifically, the level monitoring part in the present invention includes a plurality of first sensors 21 , and the plurality of first sensors 21 are arranged at intervals along the horizontal direction on the side wall of the monitoring body 10 . When the gas leaks, the gas especially refers to SF ₆ , and the SF ₆ gas will exist in a large amount at the bottom of the monitoring space, and gradually rises due to the increase of the gas amount. The monitoring department conducts monitoring. Preferably, the first sensor 21 in the present invention can be arranged according to the position that is easy to leak and the position that is not easy to leak. If a certain position often leaks, then when installing the first sensor 21, this position can be made The number of installations of the nearby first sensors 21 increases. During work, when three or more first sensors 21 sense SF ₆ , then a warning is issued to remind workers that there is leakage here.

The vertical monitoring part in the present invention includes a plurality of second sensors 22 , and the plurality of second sensors 22 are vertically and horizontally arranged on the side wall of the monitoring body 10 at intervals. When a large-scale leakage of gas occurs, multiple second sensors 22 arranged perpendicular to the horizontal direction will also detect the gas at a higher place, and the staff can judge the monitoring status of the second sensors 22 to monitor the gas in the space. Preliminary judgment on the scale of the leakage will provide assistance for the next operation.

In a preferred embodiment of the invention, there are multiple horizontal monitoring parts in the present invention, and the multiple horizontal monitoring parts are arranged along the extending direction of the vertical monitoring part. When a gas leak occurs, the staff can make a more accurate judgment on the gas leak in the monitoring space according to the number of multiple first sensors 21 that sense the gas on different layers. For example, the first layer near the ground has more than When the three first sensors 21 sense the leaking gas, the staff can judge the leaking status of the leaking gas according to the number of the first sensors 21 on the second layer close to the ground that sense the leaking gas.

Preferably, the minimum distance between the plurality of level monitoring parts in the present invention and the bottom of the monitoring body 10 is 20 cm. When carrying out the monitoring of SF ₆ gas, because the density of SF ₆ is greater than air density, so once leakage occurs, SF ₆ gas will exist in a large number at the bottom of the main variable chamber, and the distance between a plurality of horizontal monitoring parts in the present invention The minimum distance from the bottom of the monitoring body 10 is set to 20 cm, which can effectively monitor the leakage of SF ₆ . This value is obtained according to computer fluid simulation and analysis of SF ₆ leakage and diffusion in the main transformer room.

Preferably, the distance between two adjacent second sensors 22 in the present invention is 50 cm. It is helpful for the second sensor 22 to detect the leakage gas arranged in the vertical direction and reduce the judgment error. This value is obtained according to computer fluid simulation and analysis of SF ₆ leakage and diffusion in the main transformer room.

In order to make the gas leakage monitoring system of the present invention monitor SF ₆ , preferably, the first sensor 21 and the second sensor 22 in the present invention are both SF ₆ sensors.

In order to enable the gas leakage monitoring system of the present invention to monitor the oxygen concentration and temperature and humidity in the monitoring space while monitoring the arrangement of SF ₆ , preferably, the gas leakage monitoring system of the present invention further includes a sensor 30, the sensor The sensing part 30 is installed on the side wall of the monitoring body 10 for monitoring the oxygen concentration, temperature and humidity in the monitoring space.

Preferably, the distance between the sensing part 30 and the bottom of the monitoring body 10 is 160 cm.

Specifically, the sensing unit 30 of the present invention includes an oxygen sensor for sensing oxygen concentration and a temperature and humidity sensor for sensing temperature and humidity.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. a gas leakage monitoring system, it is characterised in that including:

Supervision subjects (10), described supervision subjects (10) is internally provided with monitoring space, is provided with transformation in described monitoring space Device；

Level monitoring portion, described level monitoring portion is arranged in described monitoring space, for monitoring the water in described monitoring space The gas of flat directional spreding；

Vertically monitoring portion, described vertical monitoring portion is arranged in described monitoring space, for monitoring erecting in described monitoring space The gas of straight directional spreding.

Gas leakage monitoring system the most according to claim 1, it is characterised in that described level monitoring portion includes multiple One sensor (21), the horizontally spaced sidewall being arranged in described supervision subjects (10) of the plurality of first sensor (21) On.

Gas leakage monitoring system the most according to claim 2, it is characterised in that described vertical monitoring portion includes multiple Two sensors (22), the plurality of second sensor (22) is perpendicular to horizontal direction interval and is arranged in described supervision subjects (10) On sidewall.

Gas leakage monitoring system the most according to claim 1, it is characterised in that described level monitoring portion is multiple, institute State the bearing of trend setting along described vertical monitoring portion of multiple level monitoring portion.

Gas leakage monitoring system the most according to claim 4, it is characterised in that distance institute of the plurality of level monitoring portion The minimum range of the bottom stating supervision subjects (10) is 20cm.

Gas leakage monitoring system the most according to claim 3, it is characterised in that adjacent two described second sensors (22) spacing between is 50cm.

Gas leakage monitoring system the most according to claim 3, it is characterised in that described first sensor (21) and described Second sensor (22) is SF₆Sensor.

Gas leakage monitoring system the most according to claim 1, it is characterised in that described gas leakage monitoring system is also wrapped Including detecting means (30), described detecting means (30) is arranged on the sidewall of described supervision subjects (10), is used for monitoring described monitoring sky Interior oxygen concentration and humiture.

Gas leakage monitoring system the most according to claim 8, it is characterised in that described detecting means (30) and described monitoring The distance of main body (10) bottom is 160cm.

Gas leakage monitoring system the most according to claim 8, it is characterised in that described detecting means (30) include for Sense the oxygen sensor of oxygen concentration and for sensing the Temperature Humidity Sensor of humiture.