CN114354860A - Large-range high-precision gas measurement system and detector - Google Patents

Abstract

The invention discloses a large-scale high-precision gas measurement system and a detector, wherein the system includes: a first air pump, a second air pump, a ventilation valve, a first sensor, and a second sensor; the first air pump and the second air pump are connected to The air inlet of the ventilation valve is connected, and the first sensor and the second sensor are connected to the air outlet of the ventilation valve; working mode 1: the first air pump works to inhale the outside air, and the outside air passes through the The ventilation valve enters the first sensor; working mode 2: the second air pump works to inhale the outside air, and the outside air enters the second sensor through the ventilation valve. The solution proposed in the present application realizes that at least two or more sensors with different ranges form an array to operate independently through a ventilation valve, which can realize automatic switching of sensors with different ranges, and realize large-scale high-precision gas concentration measurement.

Description

A large-scale high-precision gas measurement system and detector

technical field

The invention relates to gas detection, and more particularly, to a large-scale high-precision gas measurement system and a detector.

Background technique

For industrial, petrochemical and other special gas preparation, storage, transportation and other places, it is urgent to realize real-time dynamic safety detection of large-scale high-precision gas sensors to ensure the safe operation of operators and equipment. However, most sensors of this measurement type on the market are electrochemical sensors, with small ranges and high accuracy. If they are used in high-concentration gas scenarios, the sensors will be poisoned or passivated, resulting in irreversible damage; sensors with large ranges have a wide measurement range, Low precision.

SUMMARY OF THE INVENTION

An object of the present invention is to provide a new technology scheme of a large-scale high-precision gas measurement system and detector.

According to a first aspect of the present invention, there is provided a large-scale high-precision gas measurement system comprising,

A first air pump, a second air pump, a ventilation valve, a first sensor, and a second sensor; the first air pump and the second air pump are connected to the air inlet of the ventilation valve, and the first sensor and the second sensor are connected to the air inlet of the ventilation valve. The outlet connection of the ventilation valve;

Working mode 1: the first air pump works to inhale the outside air, and the outside air enters the first sensor through the ventilation valve;

Working mode 2: The second air pump works to inhale the outside air, and the outside air enters the second sensor through the ventilation valve.

Optionally, the first sensor is a large-range sensor.

Optionally, the first sensor is placed in a first air chamber, and the first air chamber includes: an air inlet and an air outlet with a first one-way valve.

Optionally, the second sensor is a small range sensor.

Optionally, the second sensor is placed in a second air chamber, and the second air chamber includes: an air inlet and an air outlet with a second one-way valve.

Optionally, the ventilation valve includes: a first air inlet, a second air inlet, a first air outlet and a second air outlet;

The first air pump is connected to the first air inlet, the second air pump is connected to the second air inlet, and the air inlet of the first air chamber is connected to the first air outlet, so The air inlet of the second air chamber is connected to the second air outlet.

Optionally, the ventilation valve further comprises: a coil, a magnet and a valve body;

The magnet changes the position of the valve body by whether the coil is energized or not.

Optionally, the first air pump works to inhale the outside air, and the specific steps of the outside air entering the first sensor through the ventilation valve include:

The first air pump works to suck in the outside air, the coil in the ventilation valve is not energized, the valve body is on the right side, the right channel is blocked by the valve body, the left channel is unblocked, and the outside air will Enter the first air chamber where the first sensor is located from the left channel.

Optionally, the second air pump works to inhale the outside air, and the specific steps of the outside air entering the second sensor through the ventilation valve include:

The second air pump works to suck in the outside air, the coil in the ventilation valve is energized to generate magnetism, and is attracted by the magnet on the left side, the valve body is on the left side, and the left channel is blocked by the valve body, The right channel is unblocked, and external air will enter the second air chamber where the second sensor is located from the right channel.

According to a second aspect of the present invention, a large-scale high-precision gas detector is provided, including the large-scale high-precision gas measurement system according to any one of the first aspects of the present invention.

According to an embodiment disclosed in the present invention, it has the following beneficial effects:

Through a ventilation valve, at least two or more sensors with different ranges can form an array for independent operation, which can realize automatic switching of sensors with different ranges, and realize large-scale high-precision gas concentration measurement.

Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.

1 is a schematic diagram of a working mode of a large-scale high-precision gas measurement system provided according to an embodiment;

FIG. 2 is a schematic diagram of a second working mode of a large-scale high-precision gas measurement system provided according to an embodiment.

The figures are marked as follows: 1—the first air pump, 2—the second air pump, 3—the vent valve, 4—the first sensor, 5—the second sensor, 6—the first one-way valve, 7—the second one-way valve, 8—coil, 9—magnet, 10—valve body.

Detailed ways

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods, and apparatus should be considered part of the specification.

In all examples shown and discussed herein, any specific values should be construed as illustrative only and not limiting. Accordingly, other instances of the exemplary embodiment may have different values.

Example 1:

As shown in FIG. 1 and FIG. 2, this embodiment provides a large-scale high-precision gas measurement system, including,

The first air pump 1, the second air pump 2, the ventilation valve 3, the first sensor 4, the second sensor 5; the first air pump 1 and the second air pump 2 are connected to the air inlet of the ventilation valve 3, and the A sensor 4 and a second sensor 5 are connected to the air outlet of the vent valve 3;

Working mode 1: the first air pump 1 works to inhale the outside air, and the outside air enters the first sensor 4 through the ventilation valve 3;

Working mode 2: The second air pump 2 works to inhale the outside air, and the outside air enters the second sensor 5 through the ventilation valve 3 .

In some embodiments, the first sensor 4 is a large-range sensor.

In some embodiments, the first sensor 4 is placed in a first air chamber, and the first air chamber includes: an air inlet and an air outlet with a first one-way valve 6, and the first one-way valve 6 can ensure Just can't get in.

In some embodiments, the second sensor 5 is a small range sensor.

In some embodiments, the second sensor 5 is placed in the second air chamber, and the second air chamber includes: an air inlet and an air outlet with a second one-way valve 7, and the second one-way valve 7 can ensure Just can't get in.

The design of the gas chamber is conducive to the full contact between the sensor and the gas, and increases the contact area during the detection time.

The advantage of the one-way valve is to prevent the high-concentration gas from entering the detection channel of the small-range detection, causing the small-range sensor to be overloaded and causing irreversible damage.

In some embodiments, the ventilation valve 3 includes: a first air inlet, a second air inlet, a first air outlet and a second air outlet;

The first air pump 1 is connected to the first air inlet, the second air pump 2 is connected to the second air inlet, and the air inlet of the first air chamber is connected to the first air outlet , the air inlet of the second air chamber is connected with the second air outlet.

In some embodiments, the vent valve 3 further includes: a coil 8, a magnet 9 and a valve body 10;

The magnet 9 changes the position of the valve body 10 according to whether the coil 8 is energized or not.

In some embodiments, as shown in FIG. 1 , the first air pump 1 works to inhale the outside air, and the specific steps of the outside air entering the first sensor 4 through the ventilation valve 3 include:

The first air pump 1 works to suck in the outside air, the coil 8 in the ventilation valve 3 is not energized, the valve body 10 is on the right side, the right channel is blocked by the valve body 10, and the left channel is blocked. If it is unblocked, the outside air will enter the first air chamber where the first sensor 4 is located from the left channel.

As shown in FIG. 2 , the second air pump 2 works to inhale the outside air, and the specific steps of the outside air entering the second sensor 5 through the ventilation valve 3 include:

The second air pump 2 works to inhale the outside air, the coil 8 in the ventilation valve 3 is energized, generates magnetism, and is attracted by the magnet 9 on the left side, the valve body 10 is on the left side, and the channel on the left side is on the left side. Blocked by the valve body, the right channel is unblocked, and the outside air will enter the second air chamber where the second sensor 5 is located from the right channel.

This allows for a quick screening, and if the gas concentration is low, a small range can be switched for high-accuracy measurements.

Embodiment 2:

This embodiment provides a large-scale high-precision gas detector, including the large-scale high-precision gas measurement system described in any one of the first embodiment.

In summary, at least two sensors with different ranges can be used to form an array to operate independently through a vent valve, which can realize automatic switching of sensors with different ranges, and realize large-scale high-precision gas concentration measurement.

Although some specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are provided for illustration only and not for the purpose of limiting the scope of the invention. Those skilled in the art will appreciate that modifications may be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the invention is defined by the appended claims.

Claims (10)

1. a large-scale high-precision gas measurement system is characterized in that, comprising: A first air pump, a second air pump, a ventilation valve, a first sensor, and a second sensor; the first air pump and the second air pump are connected to the air inlet of the ventilation valve, and the first sensor and the second sensor are connected to the air inlet of the ventilation valve. The outlet connection of the ventilation valve; Working mode 1: the first air pump works to inhale the outside air, and the outside air enters the first sensor through the ventilation valve; Working mode 2: The second air pump works to inhale the outside air, and the outside air enters the second sensor through the ventilation valve. 2 . The large-range high-precision gas measurement system according to claim 1 , wherein the first sensor is a large-range sensor. 3 . 3 . The large-scale high-precision gas measurement system according to claim 2 , wherein the first sensor is placed in a first air chamber, and the first air chamber comprises: an air inlet and a first one-way belt. 4 . valve outlet. 4 . The large-scale high-precision gas measurement system according to claim 1 , wherein the second sensor is a small-scale sensor. 5 . 5 . The large-scale high-precision gas measurement system according to claim 4 , wherein the second sensor is placed in a second air chamber, and the second air chamber comprises: an air inlet and a second one-way belt. 6 . valve outlet. 6. The large-scale high-precision gas measurement system according to claim 1, wherein the ventilation valve comprises: a first air inlet, a second air inlet, a first air outlet and a second air outlet; The first air pump is connected to the first air inlet, the second air pump is connected to the second air inlet, and the air inlet of the first air chamber is connected to the first air outlet, so The air inlet of the second air chamber is connected to the second air outlet. 7. The large-scale high-precision gas measurement system according to claim 6, wherein the ventilation valve further comprises: a coil, a magnet and a valve body; The magnet changes the position of the valve body by whether the coil is energized or not. 8. The large-scale high-precision gas measurement system according to claim 7, wherein the first air pump works to inhale the outside air, and the specific steps of the outside air entering the first sensor through the ventilation valve include: The first air pump works to suck in the outside air, the coil in the ventilation valve is not energized, the valve body is on the right side, the right channel is blocked by the valve body, the left channel is unblocked, and the outside air will Enter the first air chamber where the first sensor is located from the left channel. 9. The large-scale high-precision gas measurement system according to claim 8, characterized in that, The second air pump works to inhale the outside air, and the specific steps of the outside air entering the second sensor through the ventilation valve include: The second air pump works to inhale the outside air, the coil in the ventilation valve is energized to generate magnetism, and is attracted by the magnet on the left side, the valve body is on the left side, and the left channel is blocked by the valve body, The right channel is unblocked, and external air will enter the second air chamber where the second sensor is located from the right channel. 10. A large-scale high-precision gas detector, characterized by comprising the large-scale high-precision gas measurement system according to any one of claims 1-9.

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