SF6 gas monitoring device based on infrared principle

Abstract

The utility model provides an SF6 gas monitoring device based on infrared principle, it includes casing and SF6 infrared sensor, said casing is equipped with U-shaped gas chamber inside, gas inlet and gas outlet of gas chamber are both equipped at casing right side end, casing right side end cover is equipped with wind shell, wind shell is equipped with first gas channel and second gas channel, first gas channel and gas inlet butt joint, and second gas channel and gas outlet butt joint are equipped with second gas channel. The second air channel is in butt joint with the air outlet, the air inlet end of the first air channel and the air outlet end of the second air channel are located at the bottom end of the air shell, an air draft fan is arranged on the first air channel or the second air channel, and a sensing head of the SF6 infrared sensor stretches into the air cavity. The monitoring device is provided with the exhaust fan, the exhaust fan is used for actively extracting ambient air into the air cavity, the concentration of SF6 gas in the air is analyzed through the SF6 infrared sensor, and the monitoring device has the advantage of being timely in monitoring.

Description

Technical Field

[0001] This utility model relates to an SF6 gas monitoring device based on infrared principles. Background Technology

[0002] Sulfur hexafluoride (SF6) gas is widely used in power systems, almost exclusively serving as an insulating and arc-quenching medium in medium-voltage, high-voltage, and ultra-high-voltage electrical equipment. SF6 is a colorless, odorless, tasteless, non-toxic, and heavier-than-air inert gas, making it difficult to mix with air. As a simple asphyxiant, SF6 is used in these power systems to monitor for leaks, ensuring timely alarms in case of leaks. SF6 infrared sensors are widely used, analyzing SF6 concentration through infrared spectroscopy, offering high sensitivity and accuracy. However, current monitoring devices are non-active, meaning they rely on airflow into the analysis chamber for concentration analysis. Sometimes, by the time the SF6 concentration is detected, a significant amount has already leaked into the air, resulting in delayed detection.

[0003] Therefore, it is necessary to make further improvements to the cleaning station. Utility Model Content

[0004] To address the aforementioned issues, this invention proposes an SF6 gas monitoring device based on infrared principles. This monitoring device actively draws outside air into its interior via an exhaust fan to analyze the concentration of sulfur hexafluoride.

[0005] This utility model proposes an SF6 gas monitoring device based on infrared principle, which includes a housing and an SF6 infrared sensor. The housing has a U-shaped air chamber inside, with the air inlet and outlet of the air chamber located on the right side of the housing. The right side end cover of the housing has a fan shell, which has a first air channel and a second air channel. The first air channel is connected to the air inlet, and the second air channel is connected to the air outlet. The air inlet end of the first air channel and the air outlet end of the second air channel are located on the bottom of the fan shell. An exhaust fan is provided on the first or second air channel. The sensing head of the SF6 infrared sensor is inserted into the air chamber.

[0006] In one or more embodiments, the left side of the housing has a first mounting port for mounting an SF6 infrared sensor, and the sensing head of the SF6 infrared sensor is inserted into the air chamber through the first mounting port.

[0007] In one or more embodiments, a dust cover is provided on the left side of the housing, and the dust cover and the housing form an installation cavity, in which the SF6 infrared sensor is located.

[0008] In one or more embodiments, ventilation grilles are provided on the first air duct and the second air duct.

[0009] In one or more embodiments, the housing is provided with an oxygen sensor and a humidity sensor, with the sensing heads of the oxygen sensor and the humidity sensor protruding into the air chamber.

[0010] In one or more embodiments, the left side end of the housing has a second mounting port and a third mounting port, the second mounting port being used to mount an oxygen sensor and the third mounting port being used to mount a humidity sensor.

[0011] In one or more embodiments, the fan housing is provided with an elastic hook, and the right side end of the housing is provided with a latch that engages with the elastic hook.

[0012] Compared with existing technologies, this solution has the following advantages: The monitoring device is equipped with an exhaust fan, which actively draws ambient air into the air chamber. The concentration of SF6 gas in the air is analyzed by an SF6 infrared sensor, which has the advantage of timely monitoring. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the monitoring device in this embodiment;

[0014] Figure 2 This is a cross-sectional view of the monitoring device in this embodiment. Detailed Implementation

[0015] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0016] Please refer to the appendix. Figure 1-2 This utility model provides an SF6 gas monitoring device based on infrared principle, which includes a housing 1 and an SF6 infrared sensor 2. The housing has a U-shaped air chamber 3 inside, with the air inlet and outlet of the air chamber located on the right side of the housing 1. The right side end cover of the housing has a fan shell 4, which has a first air channel 5 and a second air channel 6. The first air channel is connected to the air inlet, and the second air channel is connected to the air outlet. The air inlet end of the first air channel 5 and the air outlet end of the second air channel 6 are located on the bottom end of the fan shell 4. An exhaust fan 7 is provided on the first or second air channel. The sensing head of the SF6 infrared sensor 2 is inserted into the air chamber. The exhaust fan draws outside air into the air chamber, and the infrared sensor analyzes the concentration of SF6 gas in the air. Due to the active exhaust fan, it has the advantages of high monitoring sensitivity and timely feedback information.

[0017] The left side of the housing 1 has a first mounting port for installing the SF6 infrared sensor 2. The sensing head of the SF6 infrared sensor is inserted into the air chamber 3 through the first mounting port. In order to improve airtightness, a rubber ring can be set on the first mounting port for sealing. The SF6 infrared sensor can be fixed to the housing with screws.

[0018] The left side of the housing 1 is provided with a dust cover 8, which together with the housing forms an installation cavity 9. The SF6 infrared sensor 2 is located in the installation cavity. The dust cover can prevent dust and water, and also facilitates the inspection or replacement of the SF6 infrared sensor after opening the dust cover later.

[0019] The first airway 5 and the second airway 6 are equipped with ventilation grilles, which can prevent larger foreign objects from entering the air cavity.

[0020] The housing 1 is equipped with an oxygen sensor 10 and a humidity sensor 11. The sensing heads of the oxygen sensor and the humidity sensor are inserted into the air chamber. The oxygen sensor can read the oxygen content in the air, while the humidity sensor reads the humidity value in the air. Preferably, the left side end of the housing 1 has a second mounting port and a third mounting port. The second mounting port is used to install the oxygen sensor 10, and the third mounting port is used to install the humidity sensor 11.

[0021] The fan casing 4 is provided with an elastic hook, and the right side end of the casing 1 is provided with a snap-fit ​​opening that cooperates with the elastic hook. It is installed by snap-fitting and has the advantages of easy installation and disassembly of the fan casing.

[0022] The above are preferred embodiments of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. Any equivalent modifications or changes made by those skilled in the art based on the content disclosed in the present utility model should be included in the protection scope recorded in the claims.

Claims

1. An SF6 gas monitoring device based on infrared principle, characterized in that: Includes a housing (1) and an SF6 infrared sensor (2). The housing has a U-shaped air chamber (3) inside. The air inlet and outlet of the air chamber are located on the right side of the housing (1). The right side end cover of the housing has a fan shell (4). The fan shell has a first air passage (5) and a second air passage (6). The first air passage is connected to the air inlet, and the second air passage is connected to the air outlet. The air inlet end of the first air passage (5) and the air outlet end of the second air passage (6) are located on the bottom end of the fan shell (4). The first air passage or the second air passage is equipped with an exhaust fan (7). The sensing head of the SF6 infrared sensor (2) is inserted into the air chamber.

2. The SF6 gas monitoring device based on infrared principle according to claim 1, characterized in that: The left side of the housing (1) has a first mounting port for installing the SF6 infrared sensor (2), and the sensing head of the SF6 infrared sensor is inserted into the air chamber (3) through the first mounting port.

3. The SF6 gas monitoring device based on infrared principle according to claim 2, characterized in that: The left side of the housing (1) is provided with a dust cover (8), which together with the housing forms an installation cavity (9), and the SF6 infrared sensor (2) is located in the installation cavity.

4. The SF6 gas monitoring device based on infrared principle according to claim 1, characterized in that: Ventilation grilles are provided on the first air passage (5) and the second air passage (6).

5. An SF6 gas monitoring device based on infrared principle according to any one of claims 1-4, characterized in that: The housing (1) is equipped with an oxygen sensor (10) and a humidity sensor (11), with the sensing heads of the oxygen sensor and the humidity sensor protruding into the air chamber.

6. The SF6 gas monitoring device based on infrared principle according to claim 5, characterized in that: The left side of the housing (1) has a second mounting port and a third mounting port. The second mounting port is used to install an oxygen sensor (10) and the third mounting port is used to install a humidity sensor (11).

7. The SF6 gas monitoring device based on infrared principle according to claim 1, characterized in that: The wind casing (4) is provided with an elastic hook, and the right side end of the casing (1) is provided with a slot that cooperates with the elastic hook.

Images