CN210015075U

CN210015075U - Point type gas detector for multi-gas detection

Info

Publication number: CN210015075U
Application number: CN201920645189.8U
Authority: CN
Inventors: 许潇潇; 黄荣
Original assignee: HANGZHOU SAFEEX TECHNOLOGY Co Ltd
Current assignee: HANGZHOU SAFEEX TECHNOLOGY Co Ltd
Priority date: 2019-05-07
Filing date: 2019-05-07
Publication date: 2020-02-04
Anticipated expiration: 2029-05-07

Abstract

The utility model discloses a point-type gas detector for multi-gas detection, which comprises a detection chamber, wherein the bottom of a connecting plate is respectively and fixedly provided with a first gas sensor, a second gas sensor and a third gas sensor which are all connected with an amplifying and regenerating circuit through wireless signals, and the amplifying and regenerating circuit is electrically connected with an A/D conversion circuit through a circuit, the point-type gas detector for multi-gas detection can be used for respectively detecting oxygen, toxic gas and combustible gas by being provided with three gas sensors, thereby sharing the shell of the same detector with three independent gas detectors, saving a large amount of hardware cost and use and maintenance cost, and through a metal mesh enclosure arranged outside the detection chamber and matching with a fire-retardant breathable plate arranged at an air inlet window, the detector has the characteristics of explosion resistance and fire resistance.

Description

Point type gas detector for multi-gas detection

Technical Field

The utility model relates to a gas detector, in particular to point type gas detector that many gases detected.

Background

At present, as is well known, the common detection of combustible gas leakage is a point-type combustible gas detector composed of a semiconductor gas sensor based on the semiconductor detection principle or a catalytic combustion gas sensor, or the common detection of toxic gas leakage is a point-type toxic gas detector composed of a semiconductor gas sensor based on the semiconductor detection principle, an electrochemical gas sensor based on the electrochemical detection principle, an infrared gas sensor based on the infrared detection principle, and an ultraviolet gas sensor (PID sensor for short) based on the ultraviolet detection principle. The point type gas detection uses a single sensor to detect only a certain gas, so that the danger of multiple gas leakage is usually hidden in dangerous places, the corresponding gas detector can be selected according to the gas possibly leaking, a large number of various gas detectors can be installed and used on the site at the same time, the occupied space is large, and the use is troublesome.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a point type gas detector that many gases detected to solve the current gas detector who provides in the above-mentioned background art and use single sensor only to certain gaseous detection, lead to the scene to have a large amount of various gas detectors and install the use simultaneously, occupation space is great, uses comparatively trouble problem.

In order to achieve the above object, the utility model provides a following technical scheme: a point-type gas detector for multi-gas detection comprises a detection chamber, wherein an arc cover is fixedly arranged at the top of the detection chamber, a gas inlet window is formed in the bottom of the detection chamber, a main control circuit board is fixedly arranged in the arc cover, an amplification regeneration circuit, an A/D conversion circuit and an MCU processing chip are integrated on the surface of the main control circuit board, a connecting column penetrating through a top plate of the detection chamber is fixedly arranged at the bottom of the connecting column, a connecting plate is fixedly arranged at the bottom of the connecting column, a first gas sensor, a second gas sensor and a third gas sensor are respectively and fixedly arranged at the bottom of the connecting plate, the first gas sensor, the second gas sensor and the third gas sensor are all in signal connection with the amplification regeneration circuit through wireless signals, and the amplification regeneration circuit is electrically connected with the A/D conversion circuit through circuits, the A/D conversion circuit is electrically connected with the MCU processing chip through a circuit.

As an optimal technical scheme of the utility model, the fixed display screen that is equipped with in front of arc cover, the display screen passes through radio signal and MCU processing chip's data display module signal connection.

As a preferred technical scheme of the utility model, the outside that detects the room is equipped with the metal screen panel, the bolt and the arc cover threaded connection that the metal screen panel was equipped with through the top is fixed.

As a preferred technical scheme of the utility model, the inside block of air intake window is connected with the filter screen.

As an optimal technical scheme of the utility model, the fixed back-fire relief air permeability plate that is equipped with of detection room inside bottom plate, the air inlet department at air intake window top is arranged in to back-fire relief air permeability plate.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model relates to a gaseous detector of some types that many gases detected, through being provided with three gas sensor, can be used to detect oxygen respectively, toxic gas (such as carbon monoxide), combustible gas (such as methane), thereby with the shell of the same detector of three kinds of independent gas detector sharing, can practice thrift a large amount of hardware costs and use the maintenance cost, through the metal mesh enclosure that sets up in the detection chamber outside, and the cooperation is at the back-fire relief gas permeable plate that intake window set up, make this detector have explosion-proof, the characteristic of fire prevention, through being provided with the filter screen, can filter the impurity that exists in the gas when gaseous entering detection chamber, avoid influencing the detection precision.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a schematic diagram of a control module according to the present invention;

fig. 4 is a schematic structural view of the main control circuit board of the present invention;

in the figure: 1. an arc-shaped cover; 2. MCU processing chip; 3. a main control circuit board; 4. a display screen; 5. a first gas sensor; 6. a second gas sensor; 7. a third gas sensor; 8. a detection chamber; 9. a metal mesh enclosure; 10. a bolt; 11. an air intake window; 12. a filter screen; 13. fire-retardant breathable plate; 14. an amplification regeneration circuit; 15. an A/D conversion circuit.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, the utility model provides a point type gas detector for detecting multiple gases, which comprises a detection chamber 8, an arc cover 1 is fixedly arranged on the top of the detection chamber 8, an air inlet window 11 is arranged on the bottom of the detection chamber 8, a main control circuit board 3 is fixedly arranged in the arc cover 1, an amplification regeneration circuit 14, an a/D conversion circuit 15 and an MCU processing chip 2 are integrated on the surface of the main control circuit board 3, a connection column penetrating through the top plate of the detection chamber 8 is fixedly arranged on the bottom of the main control circuit board 3, a connection plate is fixedly arranged on the bottom of the connection column, a first gas sensor 5, a second gas sensor 6 and a third gas sensor 7 are respectively and fixedly arranged on the bottom of the connection plate, the first gas sensor 5, the second gas sensor 6 and the third gas sensor 7 are all in signal connection with the amplification regeneration circuit 14 through wireless signals, the amplification regeneration circuit 14 is electrically connected with the a/D conversion circuit 15 through a circuit, the A/D conversion circuit 15 is electrically connected with the MCU processing chip 2 through a circuit.

Preferably, the front of the arc cover 1 is fixedly provided with a display screen 4, the display screen 4 is in signal connection with the data display module of the MCU processing chip 2 through a wireless signal, and the measured gas concentration value can be displayed.

Preferably, a metal mesh enclosure 9 is arranged on the outer side of the detection chamber 8, and the metal mesh enclosure 9 is in threaded connection with the arc-shaped enclosure 1 through a bolt 10 fixedly arranged on the top of the metal mesh enclosure 9, so that the detector has an explosion-proof characteristic.

Preferably, the inside block of air inlet window 11 is connected with filter screen 12, and filter screen 12 can effectively filter the impurity that exists in the gas, avoids influencing the detection precision.

Preferably, the bottom plate in the detection chamber 8 is fixedly provided with a fire-retardant ventilating plate 13, and the fire-retardant ventilating plate 13 is arranged at the air inlet at the top of the air inlet window 11 to prevent combustible gas from being burnt.

When in use, the utility model relates to a point type gas detector for multi-gas detection, when in use, the gas to be detected enters the detection chamber 8 through the air inlet window 11, at the moment, the filter screen 12 can effectively filter the impurities existing in the gas, thereby avoiding influencing the detection precision, after the gas enters the detection chamber 8, one gas sensor is used for detection and collection, the first gas sensor 5 with the model of MQ-8 can detect oxygen, the second gas sensor 6 with the model of MQ-7 can detect toxic gas, the third gas sensor 7 with the model of MQ-9 can detect combustible gas, after detection, the three gas sensors transmit the collected electric signals to the amplifying and regenerating circuit 14 for regeneration and amplification, then the amplified signals are transmitted to the A/D conversion circuit 15 with the model of PCF8591, the analog electric signals are converted into digital signals and then transmitted to the MCU processing chip 2, the rethread display screen 4 shows after handling, and this kind of gas detector can practice thrift a large amount of hardware costs and use the maintenance cost with the shell of the same detector of three kinds of independent gas detectors sharing, in addition, through the metal screen panel 9 that sets up in the detection room 8 outside to the cooperation is at the back-fire relief air-permeable plate 13 that air inlet window 11 set up, makes this detector have explosion-proof, fire-proof characteristic.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second", "third", "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby the features defined as "first", "second", "third", "fourth" may explicitly or implicitly include at least one such feature.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a many gaseous point type gas detector who detects, is including detecting room (8), its characterized in that, the fixed arc cover (1) that is equipped with in top that detects room (8), admit air window (11) have been seted up to the bottom that detects room (8), the fixed main control circuit board (3) that is equipped with in inside of arc cover (1), the surface integration of main control circuit board (3) has enlarged regeneration circuit (14), AD converting circuit (15) and MCU to handle chip (2), the fixed spliced pole that passes detection room (8) roof that is equipped with in bottom of main control circuit board (3), the fixed connecting plate that is equipped with in bottom of spliced pole, the bottom of connecting plate is fixed respectively is equipped with first gas sensor (5), second gas sensor (6) and third gas sensor (7), first gas sensor (5), The second gas sensor (6) and the third gas sensor (7) are in signal connection with an amplification regeneration circuit (14) through wireless signals, the amplification regeneration circuit (14) is electrically connected with an A/D conversion circuit (15) through a circuit, and the A/D conversion circuit (15) is electrically connected with the MCU processing chip (2) through a circuit.

2. A multiple gas sensing point-type gas sensor as claimed in claim 1, wherein: the front of the arc cover (1) is fixedly provided with a display screen (4), and the display screen (4) is in signal connection with a data display module of the MCU processing chip (2) through a wireless signal.

3. A multiple gas sensing point-type gas sensor as claimed in claim 1, wherein: the outer side of the detection chamber (8) is provided with a metal mesh enclosure (9), and the metal mesh enclosure (9) is in threaded connection with the arc-shaped cover (1) through a bolt (10) fixedly arranged at the top.

4. A multiple gas sensing point-type gas sensor as claimed in claim 1, wherein: the filter screen (12) is clamped and connected in the air inlet window (11).

5. A multiple gas sensing point-type gas sensor as claimed in claim 1, wherein: and a fire-retardant ventilating plate (13) is fixedly arranged on a bottom plate in the detection chamber (8), and the fire-retardant ventilating plate (13) is arranged at an air inlet at the top of the air inlet window (11).