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CN-121995010-A - Automatic analysis sensor for gas components

CN121995010ACN 121995010 ACN121995010 ACN 121995010ACN-121995010-A

Abstract

The invention provides a gas component automatic analysis sensor, which belongs to the technical field of gas detection equipment and mainly comprises a plurality of gas sensors, a gas storage cylinder, a gas suction assembly and a component calculation module, wherein the gas suction assembly sucks gas in a space to be detected into the gas storage cylinder, a probe end of the gas sensor is arranged in the gas storage cylinder so as to collect gas component information in the gas storage cylinder at the moment through the gas sensors when the pressure in the gas storage cylinder reaches a set value, and the component calculation module calculates the content of external gas components according to the air pressure ratio in the gas storage cylinder and the space to be detected. The automatic gas component analysis sensor can accurately and rapidly detect trace gas components and has good economy.

Inventors

  • GAO ZHIHONG
  • LIU LIANGJUN

Assignees

  • 四川泰兰德仪器仪表制造有限公司

Dates

Publication Date
20260508
Application Date
20260305

Claims (10)

  1. 1. The automatic analysis sensor for the gas components comprises a plurality of gas sensors (3) and is characterized by further comprising a gas storage cylinder (1) and a gas suction assembly (2), wherein the gas suction assembly (2) sucks the gas in the space to be detected into the gas storage cylinder (1), and the probe end of the gas sensor (3) is arranged in the gas storage cylinder (1) so as to collect the gas component information in the gas storage cylinder (1) at the moment through the gas sensor (3) when the pressure in the gas storage cylinder (1) reaches a set value; The system also comprises a component calculation module, wherein the component calculation module calculates the component content of the external gas according to the air pressure ratio between the air storage cylinder (1) and the space to be measured.
  2. 2. The automatic analysis sensor for gas components according to claim 1, wherein when temperature influence is ignored, an inner pressure sensor and an outer pressure sensor are respectively arranged inside and outside the gas storage cylinder (1), and a calculation formula of the calculation module is as follows: , Wherein: the volume concentration of the target gas component in the space to be measured is; Is the volume concentration of the target gas component in the air storage cylinder (1), and is detected by the gas sensor (3); the pressure of the space to be detected is detected by the external pressure sensor; is the pressure in the air storage cylinder (1) and is detected by the internal pressure sensor.
  3. 3. The automatic analysis sensor for gas components according to claim 1, wherein when temperature influence is considered, an inner pressure sensor, an outer pressure sensor, an inner temperature sensor and an outer temperature sensor are respectively arranged inside and outside the gas storage cylinder (1), and a calculation formula of the calculation module is as follows: , Wherein: the volume concentration of the target gas component in the space to be measured is; Is the volume concentration of the target gas component in the air storage cylinder (1), and is detected by the gas sensor (3); the pressure of the space to be detected is detected by the external pressure sensor; is the pressure in the air storage cylinder (1) and is detected by the internal pressure sensor; The temperature of the space to be detected is detected by an external temperature sensor; the temperature in the air storage cylinder (1) is detected by an internal temperature sensor.
  4. 4. The automatic analysis sensor for gas components according to claim 1, wherein one side of the gas storage cylinder (1) is connected with a U-shaped pressure indicating pipe (5) communicated with the space to be measured, a liquid column (8) formed by the difficult-to-volatilize liquid is arranged in the pressure indicating pipe (5), a vent valve (4) communicated with the space to be measured is arranged on the gas storage cylinder (1), the difficult-to-volatilize liquid in the pressure indicating pipe (5) stays in the middle when the vent valve (4) is opened, and when the vent valve (4) is closed and gas is injected into the gas storage cylinder (1) through the air suction assembly (2), and the pressure in the gas storage cylinder (1) and the pressure in the space to be measured reach a corresponding ratio when the height difference of two ends of the liquid column (8) reaches a set value.
  5. 5. The automatic analysis sensor for gas components according to claim 4, wherein the pressure indicating tube (5) is made of transparent corrosion-resistant glass, one end of the pressure indicating tube is communicated with the interior of the gas storage cylinder (1) through a first air passage (6), and the other end of the pressure indicating tube is communicated with the space to be measured through a second air passage (7).
  6. 6. The automatic analysis sensor for gas components according to claim 1, wherein a limiting ring (12) is fixed in a vertical pipe section at one end of the pressure display pipe (5) communicated with a space to be detected, the limiting ring (12) is a conductor, one end of the liquid column (8) close to the limiting ring (12) floats with an insulating floating block (9), the end face of the floating block (9) supports a hollow metal disc (10), the floating block (9) vertically slides in the pressure display pipe (5) along with the liquid column (8) to bring the metal disc (10) towards the limiting ring (12), when the metal disc (10) is contacted with the limiting ring (12), the side face of the metal disc (10) is contacted with one end of a bridging guide rod (11), and the other end of the bridging guide rod (11) is fixedly connected with the side face of the limiting ring (12) so that a buzzing alarm circuit is closed.
  7. 7. The automatic analysis sensor for gas components according to claim 1, wherein a push switch is arranged in a vertical pipe section at one end of the pressure display pipe (5) communicated with a space to be detected, an insulating floating block (9) floats at one end of the liquid column (8) close to the pressure limiting ring (12), the floating block (9) vertically slides in the pressure display pipe (5) along with the liquid column (8), and when the floating block (9) floats to be in pressing contact with the push switch, the push switch is closed, so that a buzzing alarm circuit is closed.
  8. 8. An automatic analysis sensor for gas composition according to claim 1, wherein said suction assembly (2) comprises a suction pipe (201) communicating with the inside of said gas storage cylinder (1), and a suction pump mounted on said suction pipe (201), said suction pipe (201) having a collar (202) integrally at the inlet end near the bottom thereof, said suction pipe (201) having a section of externally threaded pipe at the bottom end face of said collar (202), said externally threaded pipe having an air intake pipe section (204) coaxially integrally at the bottom end thereof, said air intake pipe section (204) having a plurality of air intake holes (205) at the end near said externally threaded pipe; The filter assembly further comprises a middle thick suction cover (206) and two thin suction covers which are fixed at the top end of one filter assembly, the top ends of the suction covers (206) are sheathed on the external threaded pipe in a threaded fit manner, the bottom ends of the suction covers are fixedly inserted into the center of the top in the shell (211) of the filter assembly, a sliding column (210) is axially and elastically installed at the bottom ends of the suction covers (206), and when the sliding column (210) is started to move upwards into the bottom ends of the air inlet pipe sections (204), gas can flow into the air inlet pipe sections (204) from the bottom ends of the suction covers (206) through the air inlet holes (205).
  9. 9. The automatic analysis sensor for gas components according to claim 8, wherein the bottom end of the gas inlet pipe section (204) is coaxially provided with a mounting seat hole (20401), a limit column (207) is fixed at the bottom of the mounting seat, a pressure-bearing spring (208) is arranged outside the limit column (207), the bottom end of the pressure-bearing spring (208) is in abutting connection with the top end of a slide rod (209), the bottom end of the slide rod (209) is coaxially fixed with the slide column (210), and the slide column (210) seals the bottom end of the suction hood (206) in a non-working state; The filter assembly further comprises an inner filter screen (212) and an outer filter screen (217) which are fixedly arranged, the inner filter screen (212) is coaxially sleeved at the position where the sliding rod (209) penetrates out of the sliding column (210), the sliding rod (209) is axially and slidably arranged relative to the inner filter screen (212), a step plug (215) is fixed at the bottom end of the sliding rod (209), an air inlet at the center of the bottom end of the shell (211) is sealed by the step plug (215) in a non-working state, the outer filter cover is arranged at the port of the air inlet in a covering mode, and when the suction pump is started, the sliding rod (209) moves upwards to thoroughly separate from the air inlet with the step plug (215), and air flows into the shell through a gap between the air inlet and the step plug (215) after being filtered by the outer filter cover.
  10. 10. The automatic gas component analysis sensor according to claim 9, wherein the inner filter screen (212) is of a shell structure with a central convex part protruding towards the center and in a truncated cone shape, the top end of a central convex part (21201) of the inner filter screen (212) is embedded in the end face of the bottom end of the gas inlet pipe section (204), the bottom edge of the inner filter screen (212) is contacted with the end face of a threaded mounting ring (213), the threaded mounting ring (213) is screwed into the shell in a threaded fit manner so as to axially fix the inner filter screen (212), the inner side of the threaded mounting ring (213) is vertically and slidably matched with the side wall of the slide rod (209) through a plurality of connecting rods (214), and a hexagonal groove (216) is arranged in the center of the bottom end face of the stepped plug (215), so that when a wrench is inserted into the hexagonal groove (216) to rotate the slide rod (209), the threaded mounting ring (213) is screwed; The outer filter screen (217) is of a round step-shaped structure so as to be embedded in a port of the air inlet, the edge of the outer filter screen (217) is fixedly connected with the inner side of a spiral cover (218), and the spiral cover (218) is screwed onto the bottom end face of the shell in a threaded fit mode so as to axially compress the outer filter screen (217).

Description

Automatic analysis sensor for gas components Technical Field The invention belongs to the technical field of gas detection equipment, and particularly relates to an automatic analysis sensor for gas components. Background In the scenes of industrial production workshops, laboratories, indoor living and the like, the content of some gases is required to be measured, currently, gas component analysis equipment is mainly used for detecting by directly exposing a gas sensor to a space to be detected, however, the detection mode has limitations in practical application, namely when the concentration of target gas components in the space to be detected is too low, the detection signal of the sensor is weak, the sensor is easily interfered by the environment to cause insufficient detection precision, even the condition that the gas components cannot be effectively detected is caused, and the accurate analysis requirement of low-concentration gas components is difficult to meet. The high-precision detector is not excluded from partial gas sensors, and can detect trace gas, but the high-precision detector has the advantages of complex structure, higher manufacturing and purchasing cost, severe requirements on environment during use and incapability of achieving the aim of economy. Disclosure of Invention Aiming at the state of the art mentioned in the background art, in order to overcome the corresponding defects in the prior art, the invention particularly discloses a gas component automatic analysis sensor which can better solve the problems that when trace gas is detected, accurate detection is difficult or the cost is high when a high-precision detector is adopted for detection. In order to overcome the defects of the prior art, the technical scheme is that the automatic gas component analysis sensor comprises a plurality of gas sensors, a gas storage cylinder and a gas suction assembly, wherein the gas suction assembly sucks gas in a space to be detected into the gas storage cylinder, a probe end of the gas sensor is arranged in the gas storage cylinder so as to collect gas component information in the gas storage cylinder at the moment through the gas sensors when the pressure in the gas storage cylinder reaches a set value, and the automatic gas component analysis sensor further comprises a component calculation module, wherein the component calculation module calculates the content of external gas components according to the ratio of the gas pressures in the gas storage cylinder and the space to be detected. Further, when ignoring temperature influence, the inside and outside of the air storage cylinder are respectively provided with an inner pressure sensor and an outer pressure sensor, and the calculation formula of the calculation module is as follows:, Wherein: the volume concentration of the target gas component in the space to be measured is; the volume concentration of the target gas component in the gas storage cylinder is detected by the gas sensor; the pressure of the space to be detected is detected by the external pressure sensor; is the pressure in the air storage cylinder and is detected by the internal pressure sensor. Further, when considering temperature influence, the inside and outside of the air storage cylinder are respectively provided with an inner pressure sensor, an outer pressure sensor, an inner temperature sensor and an outer temperature sensor, and the calculation formula of the calculation module is as follows:, Wherein: the volume concentration of the target gas component in the space to be measured is; the volume concentration of the target gas component in the gas storage cylinder is detected by the gas sensor; the pressure of the space to be detected is detected by the external pressure sensor; The pressure in the air storage cylinder is detected by the internal pressure sensor; The temperature of the space to be detected is detected by an external temperature sensor; The temperature in the air storage cylinder is detected by an internal temperature sensor. Further, one side of the air storage cylinder is connected with a U-shaped pressure indicating pipe communicated with the space to be tested, a liquid column formed by the difficult-to-volatilize liquid is arranged in the pressure indicating pipe, a vent valve communicated with the space to be tested is arranged on the air storage cylinder, when the vent valve is opened, the difficult-to-volatilize liquid in the pressure indicating pipe stays in the middle, when the vent valve is closed, and when gas is injected into the air storage cylinder through the air suction assembly, the height difference of the two ends of the liquid column reaches a set value, and the pressure in the air storage cylinder and the space to be tested reaches a corresponding ratio. Further, the pressure display tube is made of transparent corrosion-resistant glass, one end of the pressure display tube is communicated with the inside of the