CN212134548U

CN212134548U - Catalytic combustion sensor with filtering layer

Info

Publication number: CN212134548U
Application number: CN202020295490.3U
Authority: CN
Inventors: 汪建德; 何林; 吴呈昊; 周俊萍; 李刚; 张纯忠; 刘朝阳
Original assignee: Sichuan Jiuyuan Intelligent Fire Fighting Equipment Co ltd
Current assignee: Sichuan Jiuyuan Intelligent Fire Fighting Equipment Co ltd
Priority date: 2020-03-11
Filing date: 2020-03-11
Publication date: 2020-12-11
Anticipated expiration: 2030-03-11
Also published as: CN212134548U8

Abstract

The utility model discloses a catalytic combustion sensor with filtering layer, including shell, support, detecting element, the shell sets up on the support, detecting element installs on the support, the shell wraps up detecting element inside, and the shell is not the one end opening of being connected with the support, the space between shell and support is the air chamber, be provided with filter mechanism in the shell, filter mechanism overlaps by a plurality of filtering layers and constitutes; in the actual detection process, harmful gases such as organic silicon, sulfide and chloride in the combustible gas can be prevented from contacting with the carrier catalytic element to a certain extent, so that zero point or sensitivity drift and sensitivity change of the sensor are prevented, and the accuracy of the detection result is ensured.

Description

Catalytic combustion sensor with filtering layer

Technical Field

The utility model relates to a sensor technical field especially relates to a catalytic combustion sensor with filtering layer.

Background

The catalytic combustion sensor is a sensor applied to combustible gas detection, and is widely applied to detection of combustible gas in industrial production such as families, businesses, mines, petroleum, chemical industry and the like so as to ensure the safety of people;

however, the existing catalytic combustion sensor has the following problems:

1. in the actual use process, due to different use environments, the detection element in the sensor can be in contact with harmful gases such as organic silicon, sulfide, chloride and the like, so that the sensor is poisoned, and in the specific detection process, the harmful gases such as organic silicon, sulfide, chloride and the like in the combustible gas can also cause the zero point of the carrier catalytic element or the sensitivity to drift and lose part or all of the sensitivity, so that the accuracy of the detection result is poor, and the life safety is affected.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model discloses a catalytic combustion sensor with filtering layer, at the actual testing in-process, can prevent to a certain extent harmful gas such as organosilicon, sulphide, chloride among the combustible gas and the detecting element contact in the sensor to prevent that the sensor from taking place zero point or sensitivity drift or sensitivity change, guaranteed the accuracy of testing result.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a catalytic combustion sensor with a filter layer comprises a shell, a support and a detection element, wherein the shell is arranged on the support, the detection element is arranged on the support, the shell wraps the detection element, one end of the shell, which is not connected with the support, is provided with an opening, the space between the shell and the support is an air chamber, a filter mechanism is arranged in the shell, and the filter mechanism is formed by overlapping a plurality of filter layers;

the filter mechanism includes the filter screen, the adsorbed layer, the filter membrane, the metal mesh, the opening butt on filter screen and the shell, the adsorbed layer sets up in the filter screen below, the filter membrane sets up in the adsorbed layer below, the metal mesh sets up in the filter membrane lower floor.

As a further description of the above technical solution:

the filter screen cover the opening on the shell completely, just be provided with a plurality of through-holes on the filter screen, the filter screen is the alloy material.

As a further description of the above technical solution:

the filter membrane is a waterproof and high-temperature-resistant breathable membrane, and is formed by overlapping a plurality of layers of waterproof and high-temperature-resistant breathable membranes.

As a further description of the above technical solution:

the filter screen, the adsorption layer, the filter membrane and the metal net are all of a cake-shaped structure.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. utilize filtering mechanism, can prevent to a certain extent in the actual testing process harmful gas such as organosilicon, sulphide, chloride in the combustible gas and detecting element contact, prevent that the sensor is poisoned to prevent that zero point or sensitivity drift from appearing in the sensor, sensitivity reduces or the malfunction, guaranteed the accuracy of testing result.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 2 is a schematic view of a supported catalytic element with a filter layer;

fig. 3 is a schematic view of a pedestal.

The labels in the figure are: 1-detection element, 2-air chamber, 3-support, 4-shell, 401-filter screen, 402-adsorption layer, 403-filter membrane, 404-metal mesh.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The features and properties of the present invention are described in further detail below with reference to examples.

Example 1

The embodiment is a structure of a catalytic combustion sensor with a filter layer, as shown in fig. 2 and fig. 3, the structure includes a housing 4, a support 3, and a detection element 1, wherein the housing 4 is disposed on the support 3, the detection element 1 is mounted on the support 3, the housing 4 wraps the detection element 1, an end of the housing 4, which is not connected to the support 3, is open, a space between the housing 4 and the support 3 is an air chamber 2, a filter mechanism is disposed in the housing 4, and the filter mechanism is formed by overlapping a plurality of filter layers;

as shown in fig. 1, the filtering mechanism includes a filter screen 401, an adsorption layer 402, a filter membrane 403, and a metal mesh 404, the filter screen 401 abuts against an opening of the housing 4, the adsorption layer 402 is disposed below the filter screen 401, the filter membrane 403 is disposed below the adsorption layer 402, and the metal mesh 404 is disposed below the filter membrane 403;

preferably, the filter screen 401 completely covers the opening of the housing 4, the filter screen 401 is provided with a plurality of through holes, the filter screen 401 is made of an alloy material, and the filter screen 401, the adsorption layer 402, the filter membrane 403 and the metal mesh 404 are all cake-shaped structures;

in the actual use process, due to different use environments, a detection element in the sensor can be contacted with harmful gases such as organic silicon, sulfide, chloride and the like, so that the sensor is poisoned, and in the specific detection process, the harmful gases such as organic silicon, sulfide, chloride and the like in combustible gas can cause a carrier catalytic element to have zero point or sensitivity to drift and lose part or all of the sensitivity, so that the accuracy of the detection result is poor, and the safety of a person is influenced;

the working principle of the device is further explained below:

placing a catalytic combustion sensor with a filter layer in an inspection environment, during the passage of a combustible gas into a catalytic element of a support:

firstly, the combustible gas enters a filter screen 401 from an opening on the housing 4, the filter screen 401 adsorbs part of organic matters in part of the combustible gas, and part of tiny particles in the combustible gas is discharged;

after being preliminarily filtered by the filter screen 401, the combustible gas enters the adsorption layer 402, the adsorption layer 402 is connected below the filter screen 401, the adsorption layer 402 is composed of activated carbon fibers, carbon nanotubes and graphene, granular mixed powder of aluminum oxide, zeolite, silicon dioxide and activated carbon is filled in the adsorption layer 402, and the components of the silicon dioxide and the aluminum oxide are as follows: 35-55 parts of silicon dioxide and 25-45 parts of aluminum oxide, and other trace substances can be filled in the adsorption layer 402 and used for absorbing organic silicon, sulfide and chloride in the reaction combustible gas;

wherein, the silicon dioxide and the aluminum oxide are both arranged in the order of magnitude of 30nm to 55 nm;

therefore, harmful gases such as organic silicon, sulfide, chloride and the like in the combustible gas can be prevented from contacting with the detection element to a certain extent in the actual detection process by utilizing the filtering mechanism, and the sensor is prevented from being poisoned, so that zero point or sensitivity drift of the sensor is prevented, the sensitivity is prevented from being reduced or failed, and the accuracy of the detection result is ensured;

then, the combustible gas flows through the filter membrane 403, the filter membrane 403 is a waterproof and high-temperature-resistant breathable membrane, and the filter membrane 403 is formed by overlapping a plurality of layers of waterproof and high-temperature-resistant breathable membranes, so that the filter membrane 403 can prevent water vapor from contacting the detection element 1, and the sensitivity of the detection element 1 is further ensured;

finally, the metal mesh 404 is used to wrap the catalyst ball, and the metal mesh 404 is a net structure made of platinum-silver alloy, so that the combustible gas is circulated more slowly, the contact time between the catalyst ball and the combustible gas is prolonged, and the platinum-silver alloy has better conductivity, so that the detection element 1 can be connected with the metal mesh 404.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. The utility model provides a catalytic combustion sensor with filtering layer, includes shell (4), support (3), detecting element (1), shell (4) set up on support (3), detecting element (1) is installed on support (3), including shell (4) parcel detecting element (1), just shell (4) one end opening not connected with support (3), the space between shell (4) and support (3) is air chamber (2), its characterized in that: a filtering mechanism is arranged in the shell (4), and the filtering mechanism is formed by overlapping a plurality of filtering layers;

the filter mechanism comprises a filter screen (401), an adsorption layer (402), a filter membrane (403) and a metal mesh (404), wherein the filter screen (401) is abutted to an opening on the shell (4), the adsorption layer (402) is arranged below the filter screen (401), the filter membrane (403) is arranged below the adsorption layer (402), and the metal mesh (404) is arranged on the lower layer of the filter membrane (403).

2. The catalytic combustion sensor with filter of claim 1 wherein: the opening on filter screen (401) with shell (4) covers completely, just be provided with a plurality of through-holes on filter screen (401), filter screen (401) are the alloy material.

3. The catalytic combustion sensor with filter of claim 1 wherein: the filter membrane (403) is a waterproof and high-temperature-resistant breathable membrane, and the filter membrane (403) is formed by overlapping a plurality of layers of waterproof and high-temperature-resistant breathable membranes.

4. The catalytic combustion sensor with filter of claim 1 wherein: the filter screen (401), the adsorption layer (402), the filter screen (403) and the metal mesh (404) are all of cake-shaped structures.