CN210015075U - Point type gas detector for multi-gas detection - Google Patents

Abstract

The utility model discloses a point-type gas detector for multi-gas detection, which comprises a detection chamber, a first gas sensor, a second gas sensor and a third gas sensor are respectively fixed on the bottom of a connecting plate. Both the second gas sensor and the third gas sensor are connected with the signal of the amplification and regeneration circuit through wireless signals, and the amplification and regeneration circuit is electrically connected with the A/D conversion circuit through the line. The utility model is a point-type gas detector for multi-gas detection, which is There are three gas sensors, which can be used to detect oxygen, toxic gas and combustible gas respectively, so that the three independent gas detectors share the same detector shell, which can save a lot of hardware costs and maintenance costs. The set metal mesh cover and the fire-stop ventilation plate set on the air inlet window make the detector have the characteristics of explosion-proof and fire-proof.

Description

A point-type gas detector for multi-gas detection

technical field

The utility model relates to a gas detector, in particular to a point-type gas detector for multi-gas detection.

Background technique

At present, the well-known combustible gas leak detection generally adopts the semiconductor gas sensor of the semiconductor detection principle or the point-type combustible gas detector composed of the catalytic combustion gas sensor, or the leakage detection of the toxic gas generally adopts the semiconductor detection principle of the semiconductor gas A point-type toxic gas detector consisting of a sensor, an electrochemical gas sensor based on the principle of electrochemical detection, an infrared gas sensor based on the principle of infrared light detection, and an ultraviolet gas sensor based on the principle of ultraviolet light detection (PID sensor for short). The above-mentioned point-type gas detections all use a single sensor to detect only one type of gas. For dangerous places, there is usually a hidden danger of multiple gas leakage. In this way, the corresponding gas detector will be selected for the gas that may cause leakage. There will be a large number of various gas detectors installed and used at the same time, which occupies a large space and is more troublesome to use.

Utility model content

The purpose of the present utility model is to provide a point-type gas detector for multi-gas detection, so as to solve the problem that the existing gas detectors proposed in the above-mentioned background technology only use a single sensor to detect a certain gas, resulting in a large number of on-site gas detectors. Various gas detectors are installed and used at the same time, which occupies a large space and is more troublesome to use.

In order to achieve the above purpose, the present invention provides the following technical solutions: a point-type gas detector for multi-gas detection, comprising a detection chamber, the top of the detection chamber is fixedly provided with an arc-shaped cover, and the bottom of the detection chamber is provided with Air intake window, a main control circuit board is fixed inside the arc-shaped cover, and the surface of the main control circuit board is integrated with an amplification and regeneration circuit, an A/D conversion circuit and an MCU processing chip. The bottom is fixed with a connecting column passing through the top plate of the detection chamber, the bottom of the connecting column is fixed with a connecting plate, and the bottom of the connecting plate is respectively fixed with a first gas sensor, a second gas sensor and a third gas sensor, The first gas sensor, the second gas sensor and the third gas sensor are all signal-connected to the amplifying and regenerating circuit through wireless signals, and the amplifying and regenerating circuit is electrically connected to the A/D conversion circuit through lines, and the A/D conversion circuit is electrically connected. The circuit is electrically connected with the MCU processing chip through lines.

As a preferred technical solution of the present invention, a display screen is fixed on the front of the arc-shaped cover, and the display screen is signal-connected with the data display module of the MCU processing chip through wireless signals.

As a preferred technical solution of the present invention, the outer side of the detection chamber is provided with a metal mesh cover, and the metal mesh cover is threadedly connected to the arc-shaped cover through bolts fixedly provided at the top.

As a preferred technical solution of the present invention, a filter screen is connected to the interior of the air intake window by engaging and engaging.

As a preferred technical solution of the present invention, the inner bottom plate of the detection chamber is fixedly provided with a fire-resistance and ventilation plate, and the fire-resistance and ventilation plate is placed at the air inlet at the top of the air inlet window.

Compared with the prior art, the beneficial effects of the present utility model are as follows: the utility model is a point-type gas detector for multi-gas detection, which can be used to detect oxygen, toxic gas (such as carbon monoxide), Combustible gas (such as methane), so that three independent gas detectors share the same detector shell, which can save a lot of hardware costs and maintenance costs. The fire-resistant and ventilating plate set in the window makes the detector have the characteristics of explosion-proof and fire-proof. By setting the filter screen, the impurities in the gas can be filtered out when the gas enters the detection chamber, so as to avoid affecting the detection accuracy.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the internal structure schematic diagram of the utility model;

3 is a schematic structural diagram of a control module of the present invention;

4 is a schematic structural diagram of a main control circuit board of the present invention;

In the figure: 1. Arc cover; 2. MCU processing chip; 3. Main control circuit board; 4. Display screen; 5. The first gas sensor; 6. The second gas sensor; 7. The third gas sensor; 8. Testing room; 9. Metal mesh cover; 10. Bolt; 11. Air inlet window; 12. Filter screen;

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

1-4, the present utility model provides a multi-gas detection point gas detector, including a detection chamber 8, the top of the detection chamber 8 is fixedly provided with an arc-shaped cover 1, and the bottom of the detection chamber 8 is provided with an inlet The air window 11, the main control circuit board 3 is fixed inside the arc-shaped cover 1, the surface of the main control circuit board 3 is integrated with the amplification and regeneration circuit 14, the A/D conversion circuit 15 and the MCU processing chip 2, the main control circuit board 3 The bottom of the connecting column is fixed with a connecting column passing through the top plate of the detection chamber 8, the bottom of the connecting column is fixed with a connecting plate, and the bottom of the connecting plate is respectively fixed with a first gas sensor 5, a second gas sensor 6 and a third gas sensor 7 , the first gas sensor 5, the second gas sensor 6 and the third gas sensor 7 are all signally connected to the amplifying and regenerating circuit 14 through wireless signals. The conversion circuit 15 is electrically connected to the MCU processing chip 2 through lines.

Preferably, a display screen 4 is fixed on the front of the arc-shaped cover 1 , and the display screen 4 is signal-connected with the data display module of the MCU processing chip 2 through a wireless signal, and can display the measured gas concentration value.

Preferably, the outer side of the detection chamber 8 is provided with a metal mesh cover 9, and the metal mesh cover 9 is threadedly connected to the arc-shaped cover 1 through bolts 10 fixedly provided at the top, so that the detector has the characteristics of explosion-proof.

Preferably, a filter screen 12 is connected to the inside of the air inlet window 11, and the filter screen 12 can effectively filter out impurities existing in the gas, so as to avoid affecting the detection accuracy.

Preferably, the inner bottom plate of the detection chamber 8 is fixedly provided with a fire-resisting and ventilating plate 13, and the fire-resisting and ventilating plate 13 is placed at the air inlet on the top of the air inlet window 11 to prevent the combustible gas from igniting.

In specific use, the utility model is 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, and the filter screen 12 can effectively filter out impurities in the gas. , to avoid affecting the detection accuracy. After the gas enters the detection chamber 8, it is detected and collected by one of the gas sensors. The first gas sensor 5 whose model can be MQ-8 can detect oxygen, and the second gas sensor whose model can be MQ-7 6 It can detect toxic gas, and the third gas sensor 7 can detect flammable gas. The signal is transmitted to the A/D conversion circuit 15 whose model can be PCF8591, and the analog electrical signal is converted into a digital signal and then transmitted to the MCU processing chip 2, and then displayed on the display screen 4 after processing. The two gas detectors share the same shell of the detector, which can save a lot of hardware costs and maintenance costs. In addition, through the metal mesh cover 9 arranged outside the detection chamber 8, and matched with the fire-stop ventilation plate arranged on the air inlet window 11 13. Make the detector have the characteristics of explosion-proof and fire-proof.

In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", " The orientation or positional relationship indicated by "top", "inside", "front", "center", "both ends", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description , rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present invention.

In addition, the terms "first", "second", "third", "fourth" are only used for descriptive purposes and should not be understood as indicating or implying relative importance or implying the number of technical features indicated, Thus, features defined as "first", "second", "third", "fourth" may expressly or implicitly include at least one of such features.

In the present utility model, unless otherwise expressly specified and limited, terms such as "installation", "arrangement", "connection", "fixation", "swivel connection" should be understood in a broad sense, for example, it may be a fixed connection, It can also be detachable connection or integrated; it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction of two elements Unless otherwise clearly defined, those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

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

Claims (5)

1. A point-type gas detector for multi-gas detection, comprising a detection chamber (8), characterized in that the top of the detection chamber (8) is fixedly provided with an arc-shaped cover (1), and the detection chamber (8) ) is provided with an air intake window (11) at the bottom, a main control circuit board (3) is fixed inside the arc-shaped cover (1), and an amplification and regeneration circuit (3) is integrated on the surface of the main control circuit board (3). 14), an A/D conversion circuit (15) and an MCU processing chip (2), the bottom of the main control circuit board (3) is fixedly provided with a connecting column passing through the top plate of the detection chamber (8), and the The bottom is fixed with a connecting plate, and the bottom of the connecting plate is respectively fixed with a first gas sensor (5), a second gas sensor (6) and a third gas sensor (7), the first gas sensor (5) , The second gas sensor (6) and the third gas sensor (7) are all signal-connected to the amplifying and regenerating circuit (14) through wireless signals, and the amplifying and regenerating circuit (14) is electrically connected to the A/D conversion circuit (15) through a line. The A/D conversion circuit (15) is electrically connected with the MCU processing chip (2) through a line. 2. The point-type gas detector for multi-gas detection according to claim 1, wherein a display screen (4) is fixedly arranged on the front of the arc-shaped cover (1), and the display screen (4) ) is signal-connected to the data display module of the MCU processing chip (2) through a wireless signal. 3. A point-type gas detector for multi-gas detection according to claim 1, characterized in that: the outer side of the detection chamber (8) is provided with a metal mesh cover (9), and the metal mesh cover (9) ) is threadedly connected to the arc-shaped cover (1) through the bolts (10) fixedly provided at the top. 4 . The point-type gas detector for multi-gas detection according to claim 1 , wherein a filter screen ( 12 ) is connected to the inside of the air inlet window ( 11 ). 5 . 5. A point-type gas detector for multi-gas detection according to claim 1, characterized in that: the inner bottom plate of the detection chamber (8) is fixedly provided with a fire-resisting and ventilating plate (13), and the fire-blocking and ventilating The plate (13) is placed at the air inlet at the top of the air inlet window (11).

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