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Sensor Protection Devices and Sensors

A protection device and sensor technology, which is applied in the direction of protection equipment, measuring devices, instruments, etc., can solve problems such as electromagnetic interference, weak protection ability, and failure to consider explosions, and achieve the effect of reducing explosion overpressure

Active Publication Date: 2019-08-20
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The underground coal mine is a special working environment, with flammable, explosive, and corrosive gases, humidity, water, large mine dust, and severe electromagnetic interference. High-temperature flames and high-pressure shock waves are generated, the above factors will affect the measurement accuracy of the sensor, and even cause serious damage to the sensor
At present, the commonly used temperature sensor protective sleeve is a protective device set outside the temperature sensor such as thermal resistance or thermocouple. The sleeve is usually made of stainless steel and has the characteristics of waterproof, anti-electromagnetic interference, and corrosion resistance. The existing The casing has a certain protection ability for the sensor in the underground environment of the coal mine, but the existing protective casing does not take into account the explosion of flammable, explosive and combustible gas underground. When a gas explosion disaster occurs in the coal mine, the sensor is in Weak protection under high temperature flame and high pressure shock wave conditions

Method used

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  • Sensor Protection Devices and Sensors
  • Sensor Protection Devices and Sensors
  • Sensor Protection Devices and Sensors

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] like figure 1As shown, it is a schematic diagram of the application of the sensor protection device, in which the mine sensor 5 is installed at a distance of 10-15m from the outer outlet of the air duct. The resulting high-temperature flame 8, explosion overpressure, strong light, etc. The sensor protection device is connected on the sensor probe 4, and can protect the sensor 5 in the above coal mine environment.

[0039] The sensor protection device provided by this embodiment, such as figure 2 As shown, it includes a porous material protection body 1 and a fixing device 2, the upper end of the fixing device 2 is connected to the upper end of the sensor probe 4, and the fixing device 2 is sleeved outside the sensor probe 4, and the porous material protection body 1 is sleeved through the fixing device 2 The sensor probe 4 is outside, and the sensor probe 4 is completely covered by the porous material protection body 1 and the fixing device 2 in the length direction....

Embodiment 2

[0059] This embodiment is an embodiment further improved on Embodiment 1, that is, the sensor protection device provided in this embodiment includes all the structural features of the sensor protection device in Embodiment 1, and the improvements are as follows:

[0060] The porous material protection body 1 of the sensor protection device provided in this embodiment is made of a porous metal foam material. It is a porous metal foam protection body. The porous metal foam is evenly distributed with interpenetrating micropores or holes, which also have high porosity and volume. Small density, large specific surface area and unique physical surface characteristics, high temperature resistance, corrosion resistance, high chemical stability and dimensional stability, porous metal foam is an excellent explosion-proof material, and the porous material made of porous metal foam protects The body 1 has a good protective effect on the underground sensor 5 of the coal mine.

Embodiment 3

[0062] This embodiment includes all the content of Embodiment 1 or Embodiment 2, that is, the sensor provided in this embodiment includes all the structural features of the sensor protection device in Embodiment 1 or Embodiment 2.

[0063] The sensor provided in this embodiment includes a sensor probe and the sensor protection device in Embodiment 1 or Embodiment 2. The porous material protection body 1 is sheathed on the outside of the sensor probe 4 .

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Abstract

The invention discloses a sensor protective device and a sensor, and relates to the coal mine safety technical field; the sensor protective device comprises a porous material protective body and a fixed device; the top of the fixed device is connected with the top of a sensor probe; the fixed device is sleeved outside the sensor probe; the porous material protective body is sleeved outside the sensor probe through the fixed device; the sensor probe is wrapped by the porous material protective body and the fixed device in the length direction. The sensor comprises the sensor probe and said sensor protective device; the porous material protective body is sleeved outside the sensor probe. The sensor protective device and the sensor can effectively prevent dusts, humidity, high temperature flame and high pressure shock waves from affecting the sensor measuring accuracy, and said factors cannot damage the sensor.

Description

technical field [0001] The invention relates to the technical field of coal mine safety, in particular to a sensor protection device and a sensor. Background technique [0002] In recent years, domestic coal mine safety accidents have occurred from time to time, especially underground gas and coal dust explosion accidents. Monitoring and monitoring is one of the main measures to prevent accidents in mine safety production and early warning of mine disasters. Sensors are the most important input signals for coal mine monitoring and monitoring systems. Therefore, the reasonable setting of sensors is the key to give full play to the role of coal mine safety monitoring system, avoid or reduce accidents, and reduce equipment investment and maintenance. [0003] For example, Article 499 of the "Coal Mine Safety Regulations" stipulates that methane sensors must be installed in the following places underground: (1) coal mining face and its air return lane and return air corner, high...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D3/08G01D21/02
Inventor 朱红青陆新晓王浩然李峰
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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