Detection device and detection system for open-circuit type long-optical-path combustible gas alarm

Abstract

The utility model provides a detection device and a detection system of an open-circuit type long-optical-path combustible gas alarm, the detection device comprises an accommodating part and a lens assembly, the accommodating part is distributed along a first direction, and two ends of the accommodating part are provided with a first lens and a second lens, so that a light path enters from the first lens at one end, passes through the interior of the accommodating part, and then is transmitted to the second lens. The inner cavity of the accommodating part is configured to be used for accommodating gas with preset integral concentration. When the emitter of the alarm emits a detection light beam to the receiver, the gas with the known integral concentration is arranged in the containing part, so that a corresponding indicating value is obtained, the indicating value error of the alarm is calculated through a formula, and the working accuracy of the alarm is detected.

Description

Technical Field

[0001] The present application relates to the technical field of combustible gas alarms, and in particular to a detection device and a detection system for an open-circuit long optical path combustible gas alarm. Background Art

[0002] Combustible gas is a form of combustible material, which refers to the gas that can be evenly mixed with air (or oxygen) within a certain concentration range to form a premixed gas, which will explode when encountering a fire source and release a large amount of energy during the combustion process.

[0003] The open-circuit long-light-path combustible gas alarm is a new type of combustible gas alarm suitable for large spaces and large areas. It is suitable for monitoring large-area leaks of combustible gas in oil pipeline systems, oil tank areas, large oil depots, liquefied petroleum gas stations, oil production platforms and other places.

[0004] The open-circuit long-light-path combustible gas alarm is based on the principle that combustible gas selectively absorbs infrared light. When combustible gas leaks in the monitored area, the infrared light emitted by the alarm transmitter is absorbed by the combustible gas, which weakens the intensity of the relevant infrared light reaching the receiving end. When the infrared light intensity decays to the alarm action threshold of the combustible gas alarm, the receiver outputs the alarm information and transmits it to the alarm repeater, and then outputs the alarm information to the alarm controller through the alarm repeater.

[0005] At present, there is no detection device for detecting the accuracy of open-circuit long-light-path combustible gas alarms in China, so a detection device is urgently needed to detect its accuracy. Utility Model Content

[0006] The purpose of the present application is to provide a detection device and a detection system, which can be used to detect the accuracy of an open-circuit long-light-path combustible gas alarm.

[0007] In a first aspect, the present application provides a detection device for an open-circuit long optical path combustible gas alarm, comprising:

[0008] A containing assembly, which is provided with a containing chamber, wherein the containing chamber is configured to contain a gas;

[0009] The lens assembly includes a first lens and a second lens, wherein the first lens is connected to one side of the receiving assembly, and the second lens is connected to the other side of the receiving assembly, so that a light beam enters from one of the first lens and the second lens, passes through the receiving cavity, and then exits from the other one.

[0010] In some embodiments, the container assembly includes a container and a connecting structure, wherein the connecting structure connects the container for inputting and / or outputting the gas from the container, and two sides of the container are connected to the first lens and the second lens.

[0011] Furthermore, the connection structure includes a first connection member and a second connection member, and the first connection member and the second connection member are both connected to the accommodating member.

[0012] Furthermore, the interface between the first connecting member and the accommodating member is a first internal interface, the first internal interface is arranged at one end of the accommodating member, and the distance between the center of the first internal interface and the adjacent end face of the accommodating member is not greater than one-fifth of the length of the accommodating member; the interface between the second connecting member and the accommodating member is a second internal interface, the second internal interface is arranged at the other end of the accommodating member, and the distance between the center of the second internal interface and the adjacent end face of the accommodating member is not greater than one-fifth of the length of the accommodating member.

[0013] Furthermore, the accommodating assembly also includes a fixing structure, and the fixing structure is connected to the accommodating member to fix the accommodating member.

[0014] In some embodiments, the containing component is configured to contain the gas at an integrated concentration of 20% of the full scale of the alarm indication, the gas at an integrated concentration of 50% of the full scale of the alarm indication, or the gas at an integrated concentration of 80% of the full scale of the alarm indication.

[0015] In some embodiments, the first lens and the second lens include sapphire optical lenses, and the first lens and the second lens have a transmittance of not less than 85% in the 400nm-5000nm spectral band.

[0016] In a second aspect, the present application provides a detection system for an open-circuit long optical path combustible gas alarm, comprising:

[0017] A transmitter for emitting a light beam;

[0018] a receiver, configured to receive the light beam emitted by the emitter, wherein the light path between the emitter and the receiver is distributed along a first direction; and

[0019] As described in the first aspect of the present application, the detection device is configured in the optical path so that the light beam passes through the detection device.

[0020] The detection device and detection system of the open-circuit long optical path combustible gas alarm provided in the present application, by building a gas with a known integrated concentration into the detection device, and setting the detection device in the optical path between the alarm transmitter and the receiver, the alarm indication is compared with the known gas integrated concentration, and the alarm indication error is obtained, thereby realizing the detection of the accuracy of the alarm, which effectively solves the problem that the accuracy of the open-circuit long optical path combustible gas alarm cannot be detected in the prior art.

[0021] Other features and advantages of the present application will be described in the subsequent description, or some features and advantages can be inferred or determined without doubt from the description, or can be learned by implementing the above-mentioned technology of the present application.

[0022] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the structure of a detection device for an open-circuit long optical path combustible gas alarm provided in an embodiment of the present application;

[0025] Figure 2 A schematic diagram of the structure of a detection system for an open-circuit long optical path combustible gas alarm provided in an embodiment of the present application;

[0026] Attached photos

[0027] 100, transmitter; 200, receiver; 300, detection device; 301, container; 302, first lens; 303, second lens; 304, first tracheal interface; 305, second tracheal interface; 306, first stop valve; 307, second stop valve; 308, first internal interface; 309, second internal interface; 310, fixing structure. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0029] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0030] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0031] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or a point connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more. Example

[0033] The open-circuit long optical path combustible gas alarm is an instrument used to detect the volume concentration of combustible gases in the environment and has an alarm function. The measurement index of the open-circuit long optical path combustible gas alarm is generally expressed by the integrated concentration of the gas. According to the definition in the national standard: the integrated concentration is the mathematical integral value of the concentration of the combustible gas along the optical path length. The open-circuit long optical path combustible gas alarm can monitor the leakage range and diffusion degree of the combustible gas on the entire optical path. Its measurement unit is generally LEL.m. According to the principle characteristics of the open-circuit long optical path combustible gas alarm, a containing component with a known standard length can be used to fill the combustible gas with a known integrated concentration, and the two ends are sealed with optical lenses with high light transmittance as a standard gas chamber, which is used to detect the accuracy of the open-circuit long optical path combustible gas alarm.

[0034] like Figure 1 As shown, in the first aspect, the present application provides a detection device for an open-circuit long-optical-path combustible gas alarm, comprising: a containing component, which is provided with a containing cavity, and the containing cavity is configured to contain gas; a lens component, comprising a first lens 302 and a second lens 303, the first lens 302 being connected to one side of the containing component, and the second lens 303 being connected to the other side of the containing component, so that a light beam enters from one of the first lens 302 and the second lens 303, passes through the containing cavity, and then exits from the other one.

[0035] Exemplarily, the first lens 302 includes but is not limited to a sapphire optical lens, and the second lens 303 includes but is not limited to a sapphire optical lens. The first lens 302 and the second lens 303 have high surface hardness, stable chemical properties, and a transmittance of not less than 85% in the 400-5000nm spectral band, which is very suitable for alarms that use the characteristic absorption peak principle of hydrocarbon gases in the infrared spectrum (open-circuit long-light-path combustible gas alarms).

[0036] It can be understood that grooves are provided on both sides of the accommodating component, and UV glue is applied in the grooves. One of the grooves is used to fix the first lens 302, and the other groove is used to fix the second lens 303. The UV glue has high transparency and good temperature resistance. It can maintain a relatively stable state in a high and low temperature environment of -40 to 130 degrees. At the same time, it has strong bonding force. After the UV glue is bonded to the first lens 302 or the second lens 303, it can ensure sealing under higher pressure.

[0037] In the above implementation process, one side of the containing component is connected to the first lens 302, and the other side thereof is connected to the second lens 303. The chemical properties are stable and the cost is relatively low. At the same time, the sealing of the containing cavity can be ensured. The containing component is used to contain gas. When the detection device is used for detection, the accuracy and reliability of the alarm data can be detected.

[0038] like Figure 1 As shown, the container assembly includes a container 301 and a connecting structure, wherein the connecting structure connects the container 301 for inputting and / or outputting the gas from the container 301 , and the first lens 302 and the second lens 303 are connected to two sides of the container 301 .

[0039] Exemplarily, the container 301 includes but is not limited to a container, and the container 301 can be a round tube made of stainless steel, wherein the round tube made of stainless steel has the characteristics of high corrosion resistance, good wear resistance and high-precision size.

[0040] In the above implementation process, the connecting structure connects the container 301, the gas enters the container 301 or is discharged from the container 301 through the connecting structure, and under the action of the first lens 302 and the second lens 303, the sealing of the container 301 is ensured, thereby achieving accuracy and reliability in the detection of the alarm.

[0041] In some embodiments, the connection structure includes a first connection member and a second connection member, and the first connection member and the second connection member are both connected to the container 301. By connecting the first connection member and the second connection member to the container 301, one of the first connection member and the second connection member is used to input gas into the container 301, and the other one outputs gas from the container 301, which is beneficial to the detection of alarm data.

[0042] The first connecting member includes a first air pipe interface 304, a first stop valve 306 and a first internal interface 308. The interface between the first connecting member and the container 301 is the first internal interface 308. The first internal interface 308 is connected to the first stop valve 306. The first stop valve 306 is connected to the first air pipe interface 304. The first air pipe interface 304 is used to connect to an external air circuit. In the embodiment of the present disclosure, the first internal interface 308 is disposed at one end of the container 301, and the distance between the center and the adjacent end face of the container 301 is not greater than one fifth of the length of the container, so as to ensure that the airflow can fully flow through the container.

[0043] The second connecting member includes a second air pipe interface 305, a second stop valve 307 and a second internal interface 309. The interface between the second connecting member and the container 301 is the second internal interface 309. The second internal interface 309 is connected to the second stop valve 307. The second stop valve 307 is connected to the second air pipe interface 305. The second air pipe interface 305 is used to connect to an external air circuit. In the embodiment of the present disclosure, the second internal interface 309 is arranged at the other end of the container 301, and the distance between the center and the adjacent end face of the container 301 is not greater than one fifth of the length of the container, so as to ensure that the airflow can fully flow through the container.

[0044] In some embodiments, the container assembly further includes a fixing structure 310, the fixing structure 310 includes but is not limited to a fixing interface, and the fixing structure 310 is connected to the container 301 to fix the container 301. By connecting the fixing structure 310 to the container 301, the container 301 can be fixed in the optical path of the alarm, thereby realizing the detection of the accuracy of the alarm.

[0045] like Figure 2 As shown, in the second aspect, the present application provides a detection system for an open-circuit long optical path combustible gas alarm, comprising: a transmitter 100 for emitting a light beam; a receiver 200 for receiving the light beam emitted by the transmitter 100, and the light path between the transmitter 100 and the receiver 200 is distributed along a first direction; and a detection device 300 as described above, wherein the detection device 300 is arranged in the light path so that the light beam passes through the detection device 300.

[0046] Exemplarily, the alarm includes the transmitter 100 and the receiver 200. The alarm includes an open-circuit long-optical-path combustible gas alarm, and utilizes the principle that combustible gas has a characteristic absorption peak in the infrared spectrum band to detect the volume fractional concentration of the combustible gas along the optical path from the transmitter 100 to the receiver 200 of the alarm. It has identifiability and can accurately identify the integral concentration of the target gas in a complex background gas. It has a long service life and its main advantages are fast response speed, high repeatability, and integrated temperature compensation. According to this principle, the detection device 300 with a known standard length can be filled with combustible gas of known integral concentration, and sealed at both ends with a first lens 302 and a second lens 303 as a standard gas chamber for detection of the alarm.

[0047] In the above implementation process, the lens assembly is assembled on both sides of the containing assembly, and the containing assembly is located in the optical path between the transmitter 100 and the receiver 200. When the transmitter 100 transmits a detection light beam to the receiver 200, a gas of known integrated concentration is arranged in the containing member 301 of the containing assembly to obtain a corresponding alarm indication, and then the alarm indication error is obtained by comparing the alarm indication with the known gas integrated concentration, thereby realizing the detection of the accuracy of the alarm.

[0048] In some embodiments, the container 301 of the container assembly can be configured to accommodate a gas with an integrated concentration of 20% of the full scale of the detected alarm indication, or a gas with an integrated concentration of 50% of the full scale of the detected alarm indication, or a gas with an integrated concentration of 80% of the full scale of the detected alarm indication. By arranging gases of different integrated concentrations in the container 301 and obtaining different indication errors of the alarm, the accuracy of the detection can be effectively improved. However, the embodiments of the present application do not limit the specific integrated concentration of the gas, and those skilled in the art can set the integrated concentration of the gas as needed.

[0049] In all the embodiments of the present application, "big" and "small" are relative, "more" and "less" are relative, and "up" and "down" are relative. The expressions of such relative terms are not elaborated in the embodiments of the present application.

[0050] It should be understood that the "in this embodiment", "in the embodiment of the present application" or "as an optional implementation" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in this embodiment", "in the embodiment of the present application" or "as an optional implementation" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. Those skilled in the art should also be aware that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily required for the present application.

[0051] In the various embodiments of the present application, it should be understood that the size of the serial numbers of the above-mentioned processes does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0052] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A detection device for an open-circuit long optical path combustible gas alarm, characterized in that: include: A containing assembly, which is provided with a containing chamber, wherein the containing chamber is configured to contain a gas; The lens assembly includes a first lens and a second lens, wherein the first lens is connected to one side of the receiving assembly, and the second lens is connected to the other side of the receiving assembly, so that a light beam enters from one of the first lens and the second lens, passes through the receiving cavity, and then exits from the other one.

2. The detection device according to claim 1, characterized in that: The containing assembly includes a containing member and a connecting structure, wherein the connecting structure connects the containing member for inputting and / or outputting the gas from the containing member, and two sides of the containing member are connected to the first lens and the second lens.

3. The detection device according to claim 2, characterized in that: The connection structure includes a first connection member and a second connection member, and the first connection member and the second connection member are both connected to the accommodation member.

4. The detection device according to claim 3, characterized in that: The interface between the first connecting member and the accommodating member is a first internal interface, which is arranged at one end of the accommodating member, and the distance between the center of the first internal interface and the adjacent end face of the accommodating member is no more than one fifth of the length of the accommodating member; the interface between the second connecting member and the accommodating member is a second internal interface, which is arranged at the other end of the accommodating member, and the distance between the center of the second internal interface and the adjacent end face of the accommodating member is no more than one fifth of the length of the accommodating member.

5. The detection device according to claim 2 or 3, characterized in that: The receiving assembly further comprises a fixing structure, wherein the fixing structure is connected to the receiving member so as to fix the receiving member.

6. The detection device according to claim 1, characterized in that: The containing component is configured to contain the gas at an integrated concentration of 20% of the full scale of the alarm indication, the gas at an integrated concentration of 50% of the full scale of the alarm indication, or the gas at an integrated concentration of 80% of the full scale of the alarm indication.

7. The detection device according to claim 1, characterized in that: The first lens and the second lens include sapphire optical lenses, and the first lens and the second lens have a transmittance of not less than 85% in the 400nm-5000nm spectral band.

8. An open-circuit long-light-path combustible gas alarm detection system, characterized in that: include: A transmitter for emitting a light beam; A receiver, used to receive the light beam emitted by the emitter, wherein the light path between the emitter and the receiver is distributed along a first direction; and The detection device as described in any one of claims 1 to 7, wherein the detection device is arranged in the optical path so that the light beam passes through the detection device.

Images