Ignition device

Abstract

The utility model belongs to the technical field of ignition structures, and particularly discloses an ignition device which is installed on a detector body and comprises two sets of igniters, a power source and an ignition chamber, the ignition chamber is located in the detector body, and each set of igniter comprises an ignition tungsten needle and a sleeve; the sleeve is installed on the detector body, the ignition tungsten needles penetrate through the sleeve, one end of each ignition tungsten needle is connected with the power source, the other end of each ignition tungsten needle penetrates out of the sleeve and is located in the ignition chamber, and the ends, located in the ignition chamber, of the two ignition tungsten needles are arranged oppositely. The service life of the ignition device can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of ignition structures, in particular to an ignition device. Background Art

[0002] Currently, for flame detectors, an ignition device needs to be installed on the detector body of the flame detector to ignite and ignite, thereby generating a flame, so as to facilitate detection of the substance to be detected and obtain a signal.

[0003] However, the ignition device in the prior art uses an ignition wire (also called iron wire, resistance wire, hot wire, etc.), and by applying current and voltage at both ends of the ignition wire, the gas can be ignited to achieve combustion after it is heated red. However, since the ignition device needs to be in a working state all the time during the use of some flame detectors (such as a pulsed flame photometric detector (PFPD)), if the ignition device in the prior art is in a working state all the time, its ignition wire is very easy to burn out, and its ignition end is easily oxidized and aged after coming into contact with oxygen after being heated red, which seriously affects the service life of the ignition device. Utility Model Content

[0004] The utility model provides an ignition device, aiming to increase the service life of the ignition device.

[0005] The utility model is realized by the following technical solution: an ignition device is installed on the detector body, comprising an igniter, a power supply and an ignition chamber, wherein the ignition chamber is located inside the detector body, and the igniter is provided with two groups, and the two groups of igniters each comprise an ignition tungsten needle and a sleeve;

[0006] The sleeve is installed on the detector body, the ignition tungsten needle passes through the sleeve, and one end of the ignition tungsten needle is connected to the power supply, the other end of the ignition tungsten needle passes through the sleeve and is located in the ignition chamber, and the two ignition tungsten needles are located at one end of the ignition chamber and are arranged opposite to each other.

[0007] Compared with the existing technology, this solution has the following advantages and beneficial effects:

[0008] This solution uses an ignition tungsten needle, which has a high melting point, corrosion resistance, high density, and good thermal and electrical conductivity. With this ignition device, the ignition tungsten needle at the ignition end will not be oxidized, aged or corroded, thereby effectively improving the life of the ignition device.

[0009] In addition, the ignition tungsten of the two sets of igniters in the ignition device of this scheme are arranged opposite to each other, so that an arc is generated after power is turned on, which plays the role of ignition. The setting of the sleeve can protect and guide the installation of the ignition tungsten needle, so that the ignition tungsten needle can be smoothly installed on the detector body, and at the same time protect the ignition tungsten needle from being damaged by the outside world.

[0010] Furthermore, the sleeve includes an inner tube and an outer tube, the inner tube is located inside the outer tube, and the ignition tungsten needle passes through the inner tube.

[0011] Beneficial effect: The casing of this solution has a double-layer structure, which makes the entire casing structure thicker. Usually, the detector body is in a high-pressure state, and the double-layer casing is less likely to be penetrated and has a longer service life.

[0012] Furthermore, the two groups of igniters are symmetrically arranged on both sides of the ignition chamber, and symmetrical through holes are opened on both sides of the upper part of the ignition chamber. The ends of the two ignition tungsten needles are respectively inserted into the through holes on both sides of the upper part of the ignition chamber and are located in the ignition chamber.

[0013] Beneficial effects: In this solution, the two groups of igniters are symmetrically arranged on both sides of the ignition chamber, which can disperse the positions of the two ignition tungsten needles, reduce line crossing, and facilitate the installation of the igniters; in addition, in this solution, the two ignition tungsten needles are inserted into the through holes of the ignition chamber, which can also limit the ignition tungsten needles, making the installation position of the ignition tungsten needles more accurate and facilitating the installation of the ignition tungsten needles.

[0014] Furthermore, the sleeves in the two groups of igniters are both arranged perpendicular to the ignition chamber, and the two sleeves are located on the same side.

[0015] Beneficial effect: In this solution, the two sleeves are located on the same side and are arranged perpendicular to the ignition chamber, so that the two ignition tungsten needles can be connected to the power supply on the same side through cables, which makes the entire line connection simpler, does not cause crossover, and does not increase the cable length.

[0016] Furthermore, a mounting cavity is provided in the detector body, the upper portion of the ignition chamber and one end of the sleeve are both located in the mounting cavity, and an exhaust passage communicating with the mounting cavity is provided on the detector body.

[0017] Beneficial effects: In this solution, the exhaust channel can exhaust the ignition chamber, and the installation cavity facilitates the collection of the sleeve and the exhaust channel in the same cavity, which is convenient for the installation of the ignition tungsten needle.

[0018] Furthermore, the lower portion of the mounting cavity is filled with a potting compound for fixing the sleeve, the ignition tungsten needle and the ignition chamber.

[0019] Beneficial effect: The potting glue in this solution can play an insulating role, and at the same time can fix the sleeve, ignition tungsten needle and ignition chamber to ensure their stability, and is not prone to deviation and loosening during use, thereby ensuring the stability of ignition.

[0020] Furthermore, a connector is detachably connected to the installation cavity, a top end of the connector is located above the installation cavity, and the exhaust passage is opened inside the connector.

[0021] Beneficial effects: A connector is provided in this solution, and the connector is detachably connected to the installation cavity, which makes it convenient to check the conditions of the ignition tungsten needle and the ignition chamber in the installation cavity after the connector is disassembled, and the exhaust channel is opened inside the connector, which is convenient for production and manufacturing. The setting of the connector can extend the length of the exhaust channel, which is convenient for later connection and coordination with other equipment.

[0022] Furthermore, a flame arrester is installed inside and at the lower part of the connector.

[0023] Beneficial effect: In this solution, the flame arrester serves as a safety mechanism, which can block the flame inside. Only the gas can be discharged through the exhaust channel, and the flame will not spread outward.

[0024] Furthermore, the end of the ignition tungsten needle is a pointed structure.

[0025] Beneficial effect: The ignition tungsten needle in this solution discharges through the tip, generating more arcs, making the arc density and volume larger and easier to ignite. The ignition tungsten needle tip in this solution discharges a point, and its discharge arc surface is large. Compared with the hot wire ignition method, this method can ignite the mixture more easily and has higher ignition efficiency.

[0026] Furthermore, the sleeve and the ignition chamber are both insulating tubes.

[0027] Beneficial effects: In this solution, both the sleeve and the ignition chamber adopt insulating tubes, so both have insulation and low thermal conductivity, which can ensure the insulation of the ignition part and have high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the accompanying drawings:

[0029] Figure 1 This is a longitudinal cross-sectional view of an embodiment of an ignition device of the present utility model;

[0030] Figure 2 This is a cross-sectional view of an embodiment of an ignition device of the present invention.

[0031] Markings and corresponding parts names in the accompanying drawings:

[0032] Ignition tungsten needle 1, sleeve 2, ignition chamber 3, mixture channel 4, arc 5, potting glue 6, flame arrester 7, detector body 8, power supply 9, connector 10, exhaust channel 11, air bleed channel 12, installation cavity 13. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The schematic implementation methods of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0034] like Figure 1-Figure 2 As shown, this embodiment provides an ignition device, which is installed on the detector body 8 and includes an igniter, a power supply 9 and an ignition chamber 3. The ignition chamber 3 is located inside the detector body 8. The ignition chamber 3 is a pipeline structure, and a mixture channel 4 is formed inside it.

[0035] Two sets of igniters are provided, each comprising a tungsten ignition needle 1 and a sleeve 2. The tungsten ignition needle 1 utilizes the tungsten electrode used in welding equipment, which has a high melting point, corrosion resistance, high density, and excellent thermal and electrical conductivity. The power supply 9 utilizes a 24V DC high-voltage pulse current (a microcurrent with arc energy similar to that of a lighter). The tungsten ignition needle 1 in this embodiment is immune to oxidation, aging, or corrosion, significantly extending its service life.

[0036] The sleeve 2 is installed on the detector body 8, the ignition tungsten needle 1 passes through the sleeve 2, and one end of the ignition tungsten needle 1 is connected to the power supply 9, and the other end of the ignition tungsten needle 1 passes through the sleeve 2 and is located in the mixture channel 4 of the ignition chamber 3. The two ignition tungsten needles 1 are located at one end of the ignition chamber 3 and are arranged facing each other.

[0037] Specifically: In this embodiment, the sleeve 2 includes an inner tube and an outer tube. The inner tube is located inside the outer tube, and the inner tube and the outer tube are coaxially arranged. The ignition tungsten needle 1 passes through the inner tube. In this embodiment, the sleeve 2 and the ignition chamber 3 are both insulating tubes, specifically ceramic tubes, so that the sleeve 2 and the ignition chamber 3 have high insulation and low thermal conductivity, which can avoid reaction with the detector body 8 during ignition.

[0038] Combine Figure 2 As shown, the two groups of igniters are symmetrically arranged on both sides of the ignition chamber 3, and the sleeves in the two groups of igniters are arranged perpendicular to the ignition chamber 3, and the two sleeves 2 are located on the same side. In this way, the ignition tungsten needles 1 in the two groups of igniters can be connected to the power supply 9 on the same side, which simplifies the circuit and facilitates wiring installation.

[0039] The upper part of the ignition chamber 3 is provided with symmetrical through holes on both sides. The ends of the two ignition tungsten needles 1 are respectively inserted into the through holes on both sides of the upper part of the ignition chamber 3 and are located in the ignition chamber 3. Figure 2 As shown, the end of the ignition tungsten needle 1 is L-shaped, so that the ignition tungsten needle 1 can be turned and penetrated into the ignition chamber 3 after passing through the inner tube of the sleeve 2.

[0040] Combine Figure 1 As shown, a mounting cavity 13 is provided in the detector body 8, the upper part of the ignition chamber 3 and one end of the sleeve 2 are both located in the mounting cavity 13, and an exhaust passage 11 communicating with the mounting cavity 13 is provided on the detector body 8. In this embodiment, a connector 10 is detachably connected to the mounting cavity 13. In this embodiment, the connector 10 is threadedly connected to the mounting cavity 13, the top of the connector 10 is located above the mounting cavity 13, and the exhaust passage 11 is provided inside the connector 10.

[0041] In this embodiment, a flame arrester 7 is installed inside the connector 10 and at its lower part. The flame arrester 7 is clamped in the connector 10 and can block the flame and prevent the flame from being ejected from the exhaust channel 11, thereby ensuring safety.

[0042] Combine Figure 1 and Figure 2 As shown, in another embodiment, the lower part of the mounting cavity 13 is filled with a potting glue 6 for fixing the sleeve 2, the ignition tungsten needle 1 and the ignition chamber 3. The potting slurry can fix the positions of the ignition chamber 3, the sleeve 2 and the ignition tungsten needle 1 to ensure the stability and reliability of the three, and the potting glue 6 can play an insulating role to avoid reaction with the detector body 8 during the ignition process.

[0043] In another embodiment, the end of the ignition needle 1 is a pointed structure, that is, the end of the ignition needle 1 is in a pointed cone shape. The two ends of the ignition needle 1 adopt a tip pulse discharge mode. The tip discharge has a larger discharge arc 5, which can more easily ignite the mixture compared to the hot wire ignition method.

[0044] The specific implementation process is as follows: In the ignition device, by turning on the power supply 9, the two ignition tungsten needles 1 discharge, generating an arc 5, which reacts with the gas in the ignition chamber 3 to generate a flame, such as Figure 1 As shown, the detector body 8 is provided with an air inlet channel 12 for connecting the combustion chamber in the detector body 8 with the ignition chamber 3, and a channel for introducing the mixed gas into the mixed gas channel 4 of the ignition chamber 3, so that the mixture of the measured substance and the hydrogen-rich mixed air in the combustion chamber of the detector body 8 will be ignited by the flame on the upper part of the ignition device.

[0045] It should be noted that the above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

[0046] In the description of the present invention, it should be noted that the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0047] In the description of this document, the terms "up", "down", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only used to illustrate the relative position relationship between the various components or components, and do not particularly limit the specific installation orientation of the various components or components.

[0048] In the descriptions of this document, some terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0049] In this document, the terms "installed," "disposed," "provided with," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0050] The structures, proportions, sizes, etc. drawn in the drawings in this application are only used to match the contents disclosed in this technical briefing document for those skilled in the art to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the efficacy and purpose that can be achieved by this application.

[0051] The terms used in this document are those commonly used in the art currently in consideration of the functions of the present disclosure, but these terms may vary according to the intentions of those skilled in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the present disclosure. Therefore, the terms used in the document should not be understood as simple names, but rather as a general description based on the meaning of the terms and the present disclosure.

[0052] Flowcharts or text are used in this document to illustrate the operational steps performed according to the embodiments of the present application. It should be understood that the operational steps in the embodiments of the present application are not necessarily performed in the exact order in which they are described. Instead, the various steps may be processed in reverse order or simultaneously, as needed. Furthermore, other operations may be added to these processes, or one or more operations may be removed from these processes.

[0053] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. An ignition device, mounted on a detector body, characterized in that: It includes an igniter, a power supply and an ignition chamber. The ignition chamber is located inside the detector body. There are two groups of igniters. Both groups of igniters include an ignition tungsten needle and a sleeve. The sleeve is installed on the detector body, the ignition tungsten needle passes through the sleeve, and one end of the ignition tungsten needle is connected to the power supply, the other end of the ignition tungsten needle passes through the sleeve and is located in the ignition chamber, and the two ignition tungsten needles are located at one end of the ignition chamber and are arranged opposite to each other.

2. An ignition device according to claim 1, characterized in that: The sleeve includes an inner tube and an outer tube, the inner tube is located inside the outer tube, and the ignition tungsten needle passes through the inner tube.

3. An ignition device according to claim 1, characterized in that: The two groups of igniters are symmetrically arranged on both sides of the ignition chamber. Symmetrical through holes are opened on both sides of the upper part of the ignition chamber. The ends of the two ignition tungsten needles are respectively inserted into the through holes on both sides of the upper part of the ignition chamber and are located in the ignition chamber.

4. An ignition device according to claim 3, characterized in that: The sleeves in the two groups of igniters are both arranged vertically to the ignition chamber, and the two sleeves are located on the same side.

5. An ignition device according to claim 1, characterized in that: An installation cavity is provided in the detector body, the upper portion of the ignition chamber and one end of the sleeve are both located in the installation cavity, and an exhaust passage communicating with the installation cavity is provided on the detector body.

6. An ignition device according to claim 5, characterized in that: The lower portion of the mounting cavity is filled with potting glue for fixing the sleeve, the ignition tungsten needle and the ignition chamber.

7. An ignition device according to claim 5, characterized in that: A connector is detachably connected to the installation cavity, a top end of the connector is located above the installation cavity, and the exhaust passage is opened inside the connector.

8. An ignition device according to claim 7, characterized in that: A flame arrester is installed inside the connector and at the lower part thereof.

9. An ignition device according to any one of claims 1 to 8, characterized in that: The end of the ignition tungsten needle is a pointed end structure.

10. An ignition device according to any one of claims 1 to 8, characterized in that: The sleeve and the ignition chamber are both insulating tubes.

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