A device for detecting toxic and harmful gases

Abstract

This utility model belongs to the field of gas detectors and relates to a toxic and harmful gas detection device, comprising a number of regularly arranged detection tube segments. Each detection tube segment is equipped with a different gas detection sensor. One end of each detection tube segment is connected to a solenoid valve, and the end of the solenoid valve away from the detection tube segment is connected to a threaded interface. A front-mounted two-position three-way solenoid valve is provided between two adjacent detection tube segments, and the detection tube segments are connected in series through the front-mounted two-position three-way solenoid valve. The front-mounted two-position three-way solenoid valve or the detection tube segment is connected to a multi-way solenoid valve. The multi-way solenoid valve is connected to a gas pump. The gas pump is connected to a rear-mounted two-position three-way solenoid valve, and the rear-mounted two-position three-way solenoid valve is connected to a gas collection bottle.

Description

Technical Field

[0001] This utility model belongs to the field of gas detectors and relates to a device for detecting toxic and harmful gases. Background Technology

[0002] Application document CN216450188U discloses a toxic and harmful gas detection device. Its technical solution includes a detection platform with multiple detection grooves. Each detection groove is connected to a solenoid valve through a second delivery pipe assembly. This allows the solenoid valve to deliver various concentrations of toxic and harmful standard gases and zero-point gases to each detection platform, enabling the detection of toxic and harmful gas alarms in each detection groove. This allows for the simultaneous detection of multiple alarms, effectively improving the detection efficiency of the alarms.

[0003] However, the principle of this existing technology is based on the knowledge of the sampled gas, so that the corresponding detection path can be selected from multiple detection paths for detection. If the composition of the sampled gas is unknown, the corresponding detection path cannot be selected, and each detection path can only detect the sampled gas once, thus resulting in a waste of the sampled gas. Summary of the Invention

[0004] This invention addresses the wastefulness of existing technologies in detecting sampled gases with unknown components by providing a device for detecting toxic and harmful gases.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a toxic and harmful gas detection device, comprising a plurality of regularly arranged detection tube segments, each of which is equipped with a different gas detection sensor. The device is characterized in that one end of each detection tube segment is connected to a solenoid valve, the end of the solenoid valve furthest from the detection tube segment is connected to a threaded interface, a front-mounted two-position three-way solenoid valve is provided between two adjacent detection tube segments, and the plurality of detection tube segments are connected in series via the front-mounted two-position three-way solenoid valve. The front-mounted two-position three-way solenoid valve or the detection tube segment is connected to a multi-way solenoid valve, the multi-way solenoid valve is connected to an air pump, the air pump is connected to a rear-mounted two-position three-way solenoid valve, and the rear-mounted two-position three-way solenoid valve is connected to a gas collection bottle.

[0006] Preferably, the rear-mounted two-position three-way solenoid directional valve is also connected to a filter.

[0007] Preferably, the filter comprises a gauze layer, a first filter layer, an activated carbon layer, and a second filter layer arranged in sequence.

[0008] Preferably, the filter is connected to a reagent bottle.

[0009] Compared with the prior art, the advantages and positive effects of this utility model are as follows: This invention comprises several detection tube sections and a front-mounted two-position three-way solenoid valve. By switching the front-mounted two-position three-way solenoid valve, the detection tube sections can be arranged in parallel, non-connected, or connected in series for detection pathways. When the detection tube sections are not connected, this invention can simultaneously and independently detect the concentrations of multiple known gas components. When the detection tube sections are connected in series, unknown sample gas components can be detected. Furthermore, by reducing the path length, the invention reduces sample gas consumption. This invention also includes an air pump that draws air from the detection tube sections, creating negative pressure within the tubes. This facilitates the rapid diffusion of the atmospheric pressure sample gas from the sampling gas cylinder into the detection tube sections, enabling rapid detection. This invention further includes a gas collection bottle for collecting the sample gas within the pipeline and a reagent bottle containing chemical reagents to absorb and purify toxic and harmful components in the sample gas when collection is not required. Attached Figure Description

[0010] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of a toxic and harmful gas detection device.

[0012] In the above figures, 1 is the detection pipe section; 11 is the gas detection sensor; 2 is the threaded interface; 3 is the front-mounted two-position three-way solenoid valve; 4 is the multi-way solenoid valve; 5 is the air pump; 6 is the rear-mounted two-position three-way solenoid valve; 7 is the gas collection bottle; 8 is the filter; 81 is the gauze layer; 82 is the activated carbon layer; and 9 is the reagent bottle. Detailed Implementation

[0013] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0014] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0015] like Figure 1As shown, since gas detectors rely on different types of probes or different sensors to achieve detection, this utility model provides a toxic and harmful gas detection device, including several detection tube sections 1 arranged in a regular manner. Each detection tube section 1 is equipped with a different gas detection sensor 11 to detect different components in the gas. Each gas detection sensor 11 is electrically connected to the controller. To conserve sampling gas, one end of the detection tube segment 1 is connected to a solenoid valve, and the end of the solenoid valve away from the detection tube segment 1 is connected to a threaded interface 2 for connecting to a sampling gas cylinder. A front-mounted two-position three-way solenoid valve 3 is installed between two adjacent detection tube segments 1, and several detection tube segments 1 are connected in series through several front-mounted two-position three-way solenoid valves 3. The front-mounted two-position three-way solenoid valve 3 or the detection tube segments 1 (connected at the end of the series) are connected to the same multi-way solenoid valve 4. The multi-way solenoid valve 4 is connected to a (vacuum) air pump 5. The air pump 5 can draw air from the detection tube segment 1 to create a negative pressure, so that the atmospheric pressure sampling gas in the sampling gas cylinder can quickly diffuse into the detection tube segment 1. The air pump 5 is connected to a rear-mounted two-position three-way solenoid valve 6, and the rear-mounted two-position three-way solenoid valve 6 is connected to a gas collection bottle 7. After the detection is completed, the air pump 5 can also draw gas from the pipeline and inject it into the gas collection bottle 7 or the gas sampling bottle.

[0016] The working principle of this utility model is as follows: When the gas composition is known or it is desired to test whether a certain component is present, the corresponding detection tube segment 1 is selected, and the front two-position three-way solenoid valve 3 is controlled to disconnect the passage between adjacent detection tube segments 1, so that the detection tube segment 1 is connected to the multi-way solenoid valve 4, which can perform targeted detection on the sampled gas, and multiple detection tube segments 1 can simultaneously detect different sampled gases. When detecting the composition of an unknown gas, the control of the front two-position three-way solenoid valve 3 connects the adjacent detection tube section 1 to form a series connection, thereby disconnecting the passage between the detection tube section 1 and the multi-way solenoid valve 4. The sampling gas is injected from the detection tube section 1 at the beginning of the series connection. After the sampling gas passes through each detection tube section 1 in sequence, the multi-way solenoid valve 4 is opened, and the sampling gas flows from the detection tube section 1 at the end of the series connection to the multi-way solenoid valve 4.

[0017] Furthermore, the rear-mounted two-position three-way solenoid directional valve 6 is also connected to a filter 8.

[0018] Furthermore, the filter 8 includes a gauze layer 81, a first filter layer, an activated carbon layer 82, and a second filter layer arranged in sequence, mainly used to filter particles in the gas.

[0019] Furthermore, the filter 8 is connected to a reagent bottle 9. Before the unknown gas composition, the multi-way solenoid valve 4 is closed. After the composition is detected in the detection tube section 1, for toxic components such as CO and CH4 contained in the sampled gas, a reagent that can absorb the corresponding toxic components is added to the reagent bottle 9. Then, the multi-way solenoid valve 4 is opened to allow the toxic and harmful gas to be passed into the reagent bottle 9 for reaction / dissolution and then discharged harmlessly.

[0020] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A toxic and harmful gas detection device, comprising a plurality of detection tube segments arranged in a regular pattern, each of the detection tube segments being equipped with a different gas detection sensor, characterized in that, One end of the detection pipe section is connected to a solenoid valve, and the end of the solenoid valve away from the detection pipe section is connected to a threaded interface. A front-mounted two-position three-way solenoid directional valve is set between two adjacent detection pipe sections, and several detection pipe sections are connected in series through the front-mounted two-position three-way solenoid directional valve. The front-mounted two-position three-way solenoid directional valve or the detection pipe section is connected to a multi-way solenoid valve. The multi-way solenoid valve is connected to an air pump. The air pump is connected to a rear-mounted two-position three-way solenoid directional valve. The rear-mounted two-position three-way solenoid directional valve is connected to a gas collection bottle.

2. The toxic and harmful gas detection device according to claim 1, characterized in that, The rear-mounted two-position three-way solenoid valve is also connected to a filter.

3. The toxic and harmful gas detection device according to claim 2, characterized in that, The filter comprises a gauze layer, a first filter layer, an activated carbon layer, and a second filter layer arranged in sequence.

4. The toxic and harmful gas detection device according to claim 2, characterized in that, The filter is connected to a reagent bottle.

Images