Low-delay sensitive gas detector for industrial natural gas equipment

Abstract

The utility model relates to the field of sensors. The utility model relates to a low-delay sensitive gas detector for industrial natural gas equipment, which comprises a gas sensing element for generating a sensing signal and an oscillating circuit connected with a vibrating airflow driving device, the vibration type airflow driving device comprises an electromagnet, and the electromagnet comprises an electromagnetic coil for generating electromagnetic driving force and a movable part driven by the electromagnetic driving force; the movable part is connected with a gas driving layer for promoting gas to flow; the gas driving layer faces the natural gas sensing element; further, more airflow is driven to flow through the natural gas sensing element, so that the natural gas sensing element responds more quickly under the condition that the concentration of the to-be-detected gas is lower.

Description

Technical Field

[0001] This application relates to the field of sensors, and specifically to gas detection sensors. Background Art

[0002] Natural gas detectors are widely used detectors. The gas environment is an important environment for human life, equipment experiments, and equipment operation. Gas environment factors have an important impact on human life, equipment experiments, and equipment operation.

[0003] Existing natural gas detectors widely use conventional natural gas gas sensors, which have the characteristics of simple structure, low cost, and stable operation.

[0004] The working environment of industrial natural gas equipment has a very wide space, so the gas environment also has a relatively wide diffusion range.

[0005] However, existing natural gas gas sensors widely use the method of natural gas diffusion for induction in order to meet the design requirements of simplicity, low cost, and stable operation. That is to say, the gas needs to naturally diffuse to the sensor before it can output induction data.

[0006] In a wide gas environment, the natural diffusion of gas is relatively slow, which causes the problems of slow response speed and low sensitivity of natural gas sensors. Utility Model Content

[0007] The purpose of this utility model is to provide a low-latency and sensitive gas detector for industrial natural gas equipment to solve at least one of the above technical problems.

[0008] The technical problems solved by this utility model can be achieved by the following technical solutions:

[0009] A low-latency and sensitive gas detector for industrial natural gas equipment includes a natural gas detector, the natural gas detector has a housing and a natural gas sensing element disposed inside the housing, and a vibratory air flow driving device is also provided;

[0010] The vibratory air flow driving device includes an electromagnet, and the electromagnet includes an electromagnetic coil that generates an electromagnetic driving force and a movable part driven by the electromagnetic driving force;

[0011] The movable part is connected with a gas driving layer that promotes gas flow;

[0012] The gas driving layer faces the natural gas sensing element;

[0013] It further includes an oscillation circuit, and the oscillation circuit is connected to the electromagnetic coil;

[0014] The housing of the natural gas detector is made of an airtight housing, which has an air inlet and an air outlet;

[0015] The intake area of the housing is larger than the outlet area;

[0016] It further includes an air pump;

[0017] The intake port of the air pump is arranged upward, and the outlet port of the air pump is docked with the intake port of the housing.

[0018] In the above design, an oscillation circuit for generating an oscillation signal is used to drive a vibratory air flow driving device to generate vibration, and the vibration of the vibratory air flow driving device drives the air to flow;

[0019] The gas driving layer of the vibratory air flow driving device faces the natural gas sensing element, thereby driving more air flow to flow through the natural gas sensing element.

[0020] Through the above design: firstly, more air flow flows through the natural gas sensing element, improving the sensitivity; secondly, since it is no longer the traditional natural diffusion of gas, but driving the gas to flow, the outside gas can flow to the natural gas sensing element more quickly, making the reaction more rapid.

[0021] In this way, the natural gas sensing element can respond faster under a lower concentration of the gas to be detected.

[0022] The function of the air pump is to push the air flow far from the natural gas sensing element through the compression of the air pump and send it to the vibratory air flow driving device, and then the vibratory air flow driving device relays to push the air flow to the natural gas sensing element, thereby improving the detection range of the gas detector.

[0023] The specific gravity of natural gas is lighter than that of air, so the intake port of the air pump is arranged upward, which is convenient for sending the air flow containing natural gas to the intake port of the natural gas detector.

[0024] The air pump drives a piston through a motor or other power to compress the gas and send it into the pipeline, so the density of the air flow can be increased, providing a stronger air flow rate or air pressure for the natural gas sensing element.

[0025] In addition, the volume of the air pump is relatively small and can be applied to scenarios with limited space.

[0026] The intake area of the housing is larger than the outlet area, ensuring that there is pressurized gas in the housing, increasing the gas density and improving the detection sensitivity.

[0027] An oscillation circuit for generating an oscillation signal is connected to an electromagnetic coil to generate a periodically reversing electromagnetic drive to drive the moving part to generate vibration, and the vibration of the moving part drives the gas driving layer to drive the air to flow;

[0028] The gas driving layer faces the natural gas sensing element, thereby driving more airflows to flow through the natural gas sensing element.

[0029] In this patent, a vibratory air current driving device is used to drive the air current instead of a fan, which has the characteristics of high reliability, low cost, simple structure, high safety, etc.

[0030] For the design using a fan, an electric motor is required for driving. The service life of the electric motor is much lower than that of the vibratory air current driving device. Especially in an environment with oil stains, the rotating shaft of the electric motor is easily stuck by the oil stains, affecting the operation. While the vibratory air current driving device will not be affected by the oil stains in terms of operation. Therefore, it has the characteristic of high reliability.

[0031] The cost of a vibratory air current driving device, such as an electromagnet structure, is lower than that of an electric motor. Moreover, the vibratory air current driving device is easier to install. So it has the characteristics of lower cost and simple structure.

[0032] The distance between the vibratory air current driving device and the natural gas sensing element is less than 5 cm.

[0033] So as to generate a stronger air current for the natural gas sensing element.

[0034] The vibratory air current driving device in this patent includes a fixing ring; the gas driving layer uses an elastic vibrating film, and the gas driving layer is fixed on the fixing ring;

[0035] The electromagnet includes an electromagnetic coil and a magnetic component;

[0036] The oscillation circuit is connected to the electromagnetic coil;

[0037] One of the electromagnetic coil and the magnetic component is arranged on the gas driving layer.

[0038] The oscillation circuit outputs a current to drive the electromagnetic coil to generate a magnetic field. Under the action of the magnetic field, the electromagnetic coil and the magnetic component generate relative movement, thereby driving the gas driving layer to vibrate.

[0039] Preferably, one of the electromagnetic coil and the magnetic component is arranged on the gas driving layer and within the surrounding range of the fixing ring. To improve the firmness and stability.

[0040] For the oscillation circuit, an oscillation circuit with an oscillation frequency lower than 20 Hz is selected.

[0041] To avoid emitting sounds audible to the human ear and avoid affecting people.

[0042] Furthermore, the oscillation frequency of the oscillation circuit is set to be greater than 0.5 Hz and lower than 15 Hz.

[0043] For the vibration in this frequency band, it is convenient for the gas driving layer to generate a longer rebound time, more easily generate resonance, and generate a stronger air flow.

[0044] Further, in front of the air flow output of the vibration type air flow driving device, a natural gas sensing element is provided, and a baffle for obstructing the air flow is further provided in front of the natural gas sensing element. The natural gas sensing element is located at a position between the vibration type air flow driving device and the baffle;

[0045] Through the above design, the air flow driven by the vibration type air flow driving device can rebound after flowing through the natural gas sensing element, thereby increasing the air flow rate.

[0046] In addition, due to the presence of the baffle, it also provides a basis for increasing the gas pressure at the natural gas sensing element, which is beneficial to further improving the sensitivity and shortening the response time.

[0047] The side of the natural gas sensing element is not blocked, and the unblocked side area accounts for more than one-half of the entire side area.

[0048] This is to facilitate the diffusion or penetration of the air flow in other directions to the natural gas sensing element. At the same time, it also provides an outlet for the air flow driven by the vibration type air flow driving device. Specific Embodiment 1:

[0050] A gas one-way valve is provided on the gas driving layer;

[0051] The gas one-way valve is a one-way conduction for air flow, and the conduction direction is towards the gas one-way valve of the natural gas sensing element.

[0052] By providing a gas one-way valve on the vibration type air flow driving device, the vibration of the vibration type air flow driving device can generate more air flow flowing towards the natural gas sensing element.

[0053] The gas one-way valve includes at least one through hole provided on the gas driving layer and a movable film layer provided at the through hole.

[0054] In the above design, a gas one-way valve is directly generated on the gas driving layer of the vibration type air flow driving device, which has the characteristics of simple structure and low cost. Also, because there are fewer components and less resistance, it has the characteristics of more sensitive operation and more reliable performance.

[0055] Furthermore, the movable film layer is made of a flexible plastic film, which further ensures low cost, higher sensitivity and reliable performance. Specific Embodiment 2:

[0057] Furthermore, it further includes an air flow guiding pipeline, which has an air inlet hole and an air outlet hole; the area of the air inlet hole is larger than that of the air outlet hole; the air outlet hole faces the natural gas sensing element; the vibratory air flow driving device is connected to the air flow guiding pipeline;

[0058] Through the air flow guiding pipeline, the air flow is concentrated, so that the vibratory air flow driving device can drive more air flow to flow through the natural gas sensing element, improving the sensitivity and the response speed. The area of the air inlet hole of the air flow guiding pipeline is larger than that of the air outlet hole, so that the air flow at the air outlet hole can flow more concentratedly towards the natural gas sensing element.

[0059] Further, a gas driving layer is provided at the air inlet hole, and a gas check valve with the air flow conduction direction towards the inside of the air flow guiding pipeline is also provided at the air inlet hole.

[0060] So that when the gas driving layer oscillates, air enters through the air inlet hole, and air hardly exits through the air inlet hole, increasing the air flow rate at the air outlet hole.

[0061] When the gas driving layer pushes forward, the air inlet is opened, and when it retracts, it is closed, so that the inhaled air flow flows through the gas check valve, preparing for pushing towards the air outlet hole.

[0062] This design can provide a stronger air flow rate or air pressure for the natural gas sensing element.

[0063] A filter layer is provided at the air inlet hole to facilitate ensuring the cleanliness of the air flow.

[0064] Further, the width of the outer shell is larger than the height, and the air inlet adopts a strip-shaped air inlet; the gas driving layer adopts a gas driving layer with a width larger than the height.

[0065] Through the flattened structure, the overall thickness is reduced, avoiding an increase in the overall volume of the device. Reducing the flow resistance of the air flow from the gas direction to the natural gas sensing element due to the increase in thickness.

[0066] The end of the outer shell is a funnel-shaped structure, and the air outlet is located at the small opening of the funnel-shaped structure.

[0067] The funnel-shaped structure is adopted to facilitate reducing the air resistance.

[0068] Moreover, because of the funnel-shaped structure, the area or volume is not suddenly reduced at the air outlet, but gradually reduced, so there is almost no obstruction to the gas flowing from the side through the natural gas sensing element. Although the cost is higher compared to suddenly reducing the area or volume, it has a better sensing effect.

[0069] The beneficial effects of the present utility model are as follows. Firstly, more airflows pass through the natural gas sensing element, improving the sensitivity. Secondly, since it is no longer the traditional natural gas diffusion, but driving the gas flow, the external gas can flow to the natural gas sensing element more quickly, making the reaction more rapid.

[0070] In this way, the natural gas sensing element can respond more quickly under a lower concentration of the natural gas to be measured. Description of the Drawings

[0071] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. Among them:

[0072] Figure 1 is a schematic diagram of the present utility model;

[0073] Figure 2 is a front sectional view of the present utility model;

[0074] Figure 3 is a front side schematic diagram of the structure of the vibration-type air flow driving device of the present utility model;

[0075] Figure 4 is a rear side schematic diagram of the structure of the vibration-type air flow driving device of the present utility model.

[0076] Symbol Description:

[0077] 1. Outer shell; 2. Vibration-type air flow driving device; 3. Air flow guiding pipeline; 4. Natural gas sensing element; 5. Baffle; 6. Electromagnetic coil; 11. Air inlet; 12. Air outlet; 21. Fixed ring; 22. Gas driving layer; 23. Gas one-way valve; 231. Movable membrane layer. Detailed Embodiments

[0078] In order to make the above-mentioned objects, features and advantages of the present utility model more understandable, the detailed embodiments of the present utility model will be described in detail below in conjunction with the drawings of the specification.

[0079] Many specific details are set forth in the following description in order to provide a thorough understanding of the present utility model, but the present utility model can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0080] Secondly, the present utility model will be described in detail with reference to the schematic diagrams. When describing the embodiments of the present utility model in detail, for the convenience of explanation, the cross-sectional views showing the device structure will be enlarged locally not in accordance with the general scale, and the schematic diagrams are only examples and should not limit the scope of protection of the present utility model herein. In addition, in actual production, three-dimensional spatial dimensions including length, width, and depth should be included.

[0081] Next, the so-called "one embodiment" or "embodiment" herein refers to specific features, structures, or characteristics that may be included in at least one implementation manner of the present utility model. The "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it an embodiment that is separate or selectively mutually exclusive with other embodiments.

[0082] Referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the low-latency sensitive gas detector for industrial natural gas equipment includes a natural gas detector. The natural gas detector has a housing 1 and a natural gas sensing element 4 disposed inside the housing 1, and a vibration-type air flow driving device 2 is also provided;

[0083] The vibration-type air flow driving device 2 includes an electromagnet, and the electromagnet includes an electromagnetic coil 6 that generates an electromagnetic driving force and a movable part driven by the electromagnetic driving force;

[0084] The movable part is connected with a gas driving layer 22 that promotes gas flow;

[0085] The gas driving layer 22 faces the natural gas sensing element 4;

[0086] It further includes an oscillation circuit, and the oscillation circuit is connected to the electromagnetic coil 6;

[0087] The housing 1 of the natural gas detector adopts a housing 1 with airtightness, and has an air inlet 11 and an air outlet 12;

[0088] The area of the air inlet 11 of the housing 1 is larger than the area of the air outlet 12;

[0089] It further includes an air pump;

[0090] The air inlet port of the air pump is arranged upward, and the air outlet port of the air pump is docked with the air inlet 11 of the housing 1.

[0091] In this embodiment, an oscillation circuit for generating an oscillation signal is used to drive the vibration-type air flow driving device 2 to generate vibration, and the vibration of the vibration-type air flow driving device 2 drives the air to flow;

[0092] The gas driving layer 22 of the vibration-type air flow driving device 2 faces the natural gas sensing element 4, thereby driving more air flow to flow through the natural gas sensing element 4.

[0093] Through the above design: First, more airflows pass through the natural gas sensing element 4, improving the sensitivity. Second, since it is no longer the traditional natural diffusion of gas but driving the gas to flow, the external gas can flow to the natural gas sensing element 4 more quickly, making the reaction more rapid.

[0094] In this way, the natural gas sensing element 4 can respond more quickly under lower concentrations of the gas to be measured.

[0095] The function of the air pump is to push the airflow far from the natural gas sensing element 4 through the compression and pushing of the air pump to the vibration-type airflow driving device 2, and then the vibration-type airflow driving device 2 relays to push the airflow to the natural gas sensing element 4, thereby increasing the detection range of the gas detector.

[0096] The specific gravity of natural gas is lighter than that of air, so the air intake port of the air pump is set upward, facilitating the delivery of the airflow containing natural gas to the air intake port 11 of the natural gas detector.

[0097] The air pump drives the piston through a motor or other power, compresses the gas and sends it into the pipeline, so the density of the airflow can be increased, providing a stronger air volume or air pressure for the natural gas sensing element 4.

[0098] In addition, the volume of the air pump is relatively small, which can be applicable to scenarios with limited space.

[0099] The area of the air intake port 11 of the housing 1 is larger than the area of the air outlet port 12, ensuring that there is pressurized gas in the housing 1, increasing the gas density and improving the detection sensitivity.

[0100] An oscillation circuit for generating an oscillation signal is connected to the electromagnetic coil 6 to generate a periodically reversing electromagnetic drive to make the movable part vibrate, and the vibration of the movable part drives the gas driving layer 22 to drive the air to flow; the gas driving layer 22 faces the natural gas sensing element 4, thereby driving more airflows to pass through the natural gas sensing element 4.

[0101] In this patent, the vibration-type airflow driving device 2 is adopted to drive the airflow instead of driving through a fan, which has the characteristics of high reliability, low cost, simple structure, high safety, etc.

[0102] For the design using a fan, it needs to be driven by an electric motor. The service life of the electric motor is much lower than that of the vibration-type airflow driving device 2. In particular, in an environment with oil stains, the rotating shaft of the electric motor is easily stuck by the oil stains, affecting the operation. While the vibration-type airflow driving device 2 will not be affected by the oil stains. Therefore, it has the characteristic of high reliability.

[0103] The cost of the vibration-type air flow driving device 2, such as the structure of an electromagnet, is lower than that of an electric motor. Moreover, the vibration-type air flow driving device 2 is easier to install. Therefore, it has the characteristics of lower cost and simple structure.

[0104] The distance between the vibration-type air flow driving device 2 and the natural gas sensing element 4 is less than 5 cm.

[0105] So as to generate a stronger air flow on the natural gas sensing element 4.

[0106] The vibration-type air flow driving device 2 in this patent includes a fixing ring 21; the gas driving layer 22 is made of an elastic vibration film, and the gas driving layer 22 is fixed on the fixing ring 21;

[0107] The electromagnet includes an electromagnetic coil 6 and a magnetic component;

[0108] The oscillation circuit is connected to the electromagnetic coil 6;

[0109] One of the electromagnetic coil 6 and the magnetic component is arranged on the gas driving layer 22.

[0110] The fixing ring 21 is not necessarily a circular ring, and it can also be square as shown. The fixing ring 21 can have a depth extension to form a cylindrical shape. Figure 4 as shown. The fixing ring 21 can have a depth extension to form a cylindrical shape.

[0111] The oscillation circuit outputs a current to drive the electromagnetic coil 6 to generate a magnetic field. Under the action of the magnetic field, the electromagnetic coil 6 and the magnetic component generate relative movement, and then drive the gas driving layer 22 to vibrate.

[0112] Preferably, one of the electromagnetic coil 6 and the magnetic component is arranged on the gas driving layer 22 and within the surrounding range of the fixing ring 21 to improve the firmness and stability.

[0113] For the oscillation circuit, an oscillation circuit with an oscillation frequency lower than 20 Hz is selected.

[0114] To avoid emitting a sound that can be clearly heard by the human ear and avoid affecting people.

[0115] Furthermore, the oscillation frequency of the oscillation circuit is set to be greater than 0.5 Hz and lower than 15 Hz.

[0116] For the vibration in this frequency band, it is convenient for the gas driving layer 22 to have a longer rebound time, is more likely to generate resonance, and generate a stronger air flow.

[0117] The gas driving layer 22 and the oscillation circuit are in a resonance structure. By generating resonance, a stronger air flow can be generated while reducing energy consumption and volume.

[0118] In front of the airflow output of the vibratory airflow driving device 2, a natural gas sensing element 4 is provided. In front of the natural gas sensing element 4, a baffle 5 that obstructs the airflow is further provided. The natural gas sensing element 4 is located between the vibratory airflow driving device 2 and the baffle 5. Through the above design, the airflow driven by the vibratory airflow driving device 2 can flow through the natural gas sensing element 4 and then rebound, increasing the air volume. In addition, due to the presence of the baffle 5, it also provides a basis for increasing the gas pressure at the natural gas sensing element 4, which is beneficial to further improving the sensitivity and shortening the response time.

[0119] The side surface of the natural gas sensing element 4 is not blocked, and the unblocked side surface area accounts for more than one-half of the entire side surface area.

[0120] So that the airflow in other directions can diffuse or penetrate into the natural gas sensing element 4. At the same time, it also provides an outlet for the airflow driven by the vibratory airflow driving device 2.

[0121] The distance between the air outlet position of the airflow driving device and the gas sensing element is less than 1 cm. This is convenient for the airflow to flow concentratedly to the gas sensing element.

[0122] The air outlet position of the airflow driving device can be one of the position of the gas driving layer 22 or the air outlet position of the diversion device that diverts the airflow of the airflow driving device. Specific Embodiment 1:

[0124] A gas one-way valve 23 is provided on the gas driving layer 22;

[0125] The gas one-way valve 23 conducts air unidirectionally, and the conduction direction is towards the gas one-way valve 23 of the natural gas sensing element 4.

[0126] By providing the gas one-way valve 23 on the vibratory airflow driving device 2, the vibration of the vibratory airflow driving device 2 can generate more airflow flowing towards the natural gas sensing element 4.

[0127] The gas one-way valve 23 includes at least one through hole provided on the gas driving layer 22 and a movable film layer 231 provided at the through hole.

[0128] In this embodiment, the gas one-way valve 23 is directly formed on the gas driving layer 22 of the vibratory airflow driving device 2, which has the characteristics of simple structure and low cost. Also, because there are fewer components and less resistance, it has the characteristics of more sensitive operation and more reliable performance.

[0129] Furthermore, the movable film layer 231 is made of a flexible plastic film, which further ensures low cost, higher sensitivity and reliable performance. Specific Embodiment 2:

[0131] Furthermore, it also includes an air flow guiding pipe 3 which has an air inlet hole and an air outlet hole; the area of the air inlet hole is larger than that of the air outlet hole; the air outlet hole faces the natural gas sensing element 4; the vibratory air flow driving device 2 is connected to the air flow guiding pipe 3;

[0132] Through the air flow guiding pipe 3, the air flow is concentrated, so that the vibratory air flow driving device 2 can drive more air flow to flow through the natural gas sensing element 4, improving the sensitivity and the response speed. The area of the air inlet hole of the air flow guiding pipe 3 is larger than that of the air outlet hole, so that the air flow at the air outlet hole can flow more concentratedly towards the natural gas sensing element 4.

[0133] The air inlet hole is provided with a gas driving layer 22, and the air inlet hole is also provided with a gas one-way valve 23 whose air flow conduction direction is towards the inside of the air flow guiding pipe 3.

[0134] So that when the gas driving layer 22 oscillates, air enters through the air inlet hole, and air hardly exits through the air inlet hole, improving the air flow rate at the air outlet hole.

[0135] Preferably, the gas driving layer 22 is blocked between the air inlet hole and the air outlet hole of the air flow guiding pipe 3; the gas driving layer 22 is located inside the air inlet hole, and the air outlet hole is in front of the gas driving layer 22;

[0136] The gas one-way valve 23 is arranged on the gas driving layer 22.

[0137] Furthermore, the air inlet hole is provided with an air flow one-way valve, and the air flow one-way valve is a one-way valve whose air flow conduction direction is towards the air outlet hole.

[0138] When the gas driving layer 22 pushes forward, it opens to intake air, and when it retracts, it closes, so that the inhaled air flow flows through the gas one-way valve 23, preparing for pushing towards the air outlet hole.

[0139] This design can provide a stronger air flow rate or air pressure for the natural gas sensing element 4.

[0140] The air inlet hole is provided with a filter layer to facilitate ensuring the cleanliness of the air flow.

[0141] The width of the air flow guiding pipe 3 is larger than its height, and the air inlet hole is a strip-shaped air inlet hole; the gas driving layer 22 uses a gas driving layer 22 whose width is larger than its height. Through the flattened structure, the overall thickness is reduced, avoiding the increase in the overall volume of the device. Reducing the flow resistance of the air flow from the gas direction to the natural gas sensing element 4 due to the increase in thickness.

[0142] The end of the air flow guiding pipe 3 is a funnel-shaped structure, and the air outlet hole is located at the small opening of the funnel-shaped structure.

[0143] A funnel-shaped structure is adopted to facilitate reducing air resistance.

[0144] Moreover, due to the funnel-shaped structure, the area or volume does not suddenly decrease at the air outlet, but gradually decreases. Therefore, there is almost no obstruction to the gas flowing past the natural gas sensing element 4 from the side. Although the cost is higher compared to suddenly decreasing the area or volume, it has a better sensing effect.

[0145] In addition, to provide a concise description of the exemplary embodiments, not all features of the actual embodiments may be described, that is, those features that are not relevant to the best mode of the present invention or those features that are not relevant to implementing the present invention.

[0146] It should be understood that in the development process of any actual implementation, such as in any engineering or design project, a large number of specific implementation decisions can be made. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, without excessive experimentation, the development efforts will be a routine task of design, manufacturing, and production.

[0147] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A low-latency sensitive gas detector for industrial natural gas equipment, comprising a natural gas detector having a housing and a natural gas sensing element arranged in the housing, characterized in that: A vibrating airflow driving device is also provided; The vibration type airflow driving device includes an electromagnet, which includes an electromagnetic coil generating an electromagnetic driving force and a movable part driven by the electromagnetic driving force; The movable part is connected to a gas driving layer for promoting gas flow; The gas driving layer faces the natural gas sensing element; It also includes an oscillating circuit connected to the electromagnetic coil; The outer shell of the natural gas detector is an airtight shell with an air inlet and an air outlet; The air inlet area of ​​the housing is larger than the air outlet area; Also includes an air pump; The air inlet port of the air pump is arranged upward, and the air outlet port of the air pump is connected to the air inlet port of the shell.

2. The low-delay sensitive gas detector for industrial natural gas equipment according to claim 1, characterized in that: An oscillating circuit for generating an oscillation signal is connected to the electromagnetic coil to generate a periodic directional electromagnetic drive movable part to generate vibration, and the vibration of the movable part drives the gas drive layer to drive the air flow; The gas driving layer is directed toward the natural gas sensing element, thereby driving more gas flow through the natural gas sensing element.

3. The low-latency sensitive gas detector for industrial natural gas equipment according to claim 1, characterized in that: The distance between the vibrating airflow driving device and the natural gas sensing element is less than 5 cm.

4. The low-latency sensitive gas detector for industrial natural gas equipment according to claim 1, characterized in that: The oscillation frequency of the oscillation circuit is set to be greater than 0.5 Hz and less than 15 Hz.

5. The low-delay sensitive gas detector for industrial natural gas equipment according to claim 1, characterized in that: A natural gas sensor element is arranged in front of the airflow output of the vibrating airflow driving device, and a baffle for blocking the airflow is arranged in front of the natural gas sensor element. The natural gas sensor element is located between the vibrating airflow driving device and the baffle. The side surface of the natural gas sensor element is not blocked, and the unblocked side surface area accounts for more than one half of the entire side surface area.

6. The low-latency sensitive gas detector for industrial natural gas equipment according to claim 1, characterized in that: A gas one-way valve is provided on the gas driving layer; The gas one-way valve is a gas one-way valve that conducts gas flow in one direction, and the conduction direction is toward the natural gas sensor element.

7. The low-latency sensitive gas detector for industrial natural gas equipment according to claim 1, characterized in that: The gas one-way valve comprises at least one through hole arranged on the gas driving layer, and a movable membrane layer arranged at the through hole.

8. The low-latency sensitive gas detector for industrial natural gas equipment according to claim 1, characterized in that: It also includes an airflow guide duct, which has an air inlet and an air outlet; The area of ​​the air inlet is larger than the area of ​​the air outlet; The gas outlet is directed toward the natural gas sensing element; The vibrating airflow driving device is connected to the airflow guide duct; The air inlet is provided with a gas driving layer, and the gas driving layer is provided with a gas one-way valve with the air flow conducting direction toward the air outlet.

9. The low-latency sensitive gas detector for industrial natural gas equipment according to claim 8, characterized in that: The width of the shell is greater than its height, and the air inlet adopts a strip-shaped air inlet; The gas driving layer adopts a gas driving layer whose width is greater than its height.

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