CN219177764U

CN219177764U - Ion probe for flame monitoring

Info

Publication number: CN219177764U
Application number: CN202223364573.1U
Authority: CN
Inventors: 李为臻; 张景才; 张涛
Original assignee: Dalian Institute of Chemical Physics of CAS
Current assignee: Dalian Institute of Chemical Physics of CAS
Priority date: 2022-12-14
Filing date: 2022-12-14
Publication date: 2023-06-13
Anticipated expiration: 2032-12-14

Abstract

The utility model provides an ion probe for flame monitoring. Including the probe body, with the continuous wire of probe body and cup joint at the outside insulating housing of two, insulating housing is including being close to the temperature resistant insulation section of probe body detection end side and keeping away from the insulation section of probe body detection end side, insulating housing outside is equipped with the rigid insulation protection sleeve, and temperature resistant insulation section has preset length respectively with the insulation section or has preset proportional relation between the two. The utility model divides the insulation shell outside the probe into two parts, wherein the ceramic part serving as the temperature-resistant insulation section is short in whole and not easy to damage, and the short ceramic section enables the detection end of the ion probe to still have a certain temperature-resistant distance, so that the ion probe can receive ion signals in flame. The electric resistance of the probe is greatly reduced in a mode of being connected with the probe body through the lead arranged in the insulating shell, the electric conductivity is enhanced to some extent, the signal intensity is strong, and the detection sensitivity of the probe is improved.

Description

Ion probe for flame monitoring

Technical Field

The utility model relates to the technical field of combustors, in particular to an ion probe for flame monitoring.

Background

The burner is a generic term for a device that causes fuel and air to be ejected and burned in a fixed manner. The burner is divided into industrial burner, civil burner and special burner according to the type and application field. The burners commonly used in households include gas boilers, gas stoves, fierce fire gas stoves, infrared gas stoves, and burner heads of gas water heaters.

Such as an ion probe arranged in the burner, which is used for detecting whether flame exists or not, and the burner controller always monitors the flame state before and after operation and in the operation process so as to ensure the combustion safety. The structure of the ion probe in the market at present is mostly that the outer side of the metal probe is coated with a ceramic layer, and the ceramic layer is used for insulating the metal probe and has certain high temperature resistance; in the using process of the traditional burner, the ion probe is arranged in the air, the length of a commonly used needle is shorter, and when the length is required to be particularly long, ceramics are generally added at the two ends of the needle, and no ceramics are added in the middle; under the condition of adopting premixed combustion, the ion probe is required to pass through the combustion head, mixed gas exists in the combustion head, if the conventional method is adopted, the condition that ceramic is not added in the middle can lead the ion probe to contact the mixed gas, and serious safety risks of short circuit and ignition of the mixed gas exist. Therefore, the prior premixed combustion adopts complete ceramic coating outside the ion probe, and the arrangement condition has the following defects: 1. the cost of the long ceramic needle is relatively high; 2. the internal space of the combustion head is limited, in order to ensure that the whole diameter of the ion probe is thinner, the wall of the ceramic needle is required to be kept thin, if the ceramic needle is made to be quite long, the ceramic needle is easy to break due to external impact, or the ceramic wall is likely to break in the process of installation or equipment transportation, once the ceramic needle breaks, the needle can be short-circuited through a breaking crack and a metal sleeve, and the ion needle cannot conduct signals; 3. when the needle is longer, the signal intensity is attenuated due to the relatively large resistance of the needle, and the detector is easy to lose the signal after the signal intensity is obviously attenuated for the ion signal, so that the stable detection effect cannot be achieved, and the sensitivity is reduced.

Disclosure of Invention

According to the technical problem set forth above, an ion probe for flame monitoring is provided. The utility model adopts the following technical means:

the utility model provides an ion probe for flame monitoring, includes the probe body, the wire that links to each other with the probe body and cup joints at the outside insulating housing of two, insulating housing include be close to the temperature resistant insulation section of probe body detection end side and keep away from the insulation section of probe body detection end side, insulating housing outside is equipped with the rigid insulation protection sleeve, and temperature resistant insulation section has preset length respectively with the insulation section or has preset proportional relation between the two.

Further, the junction of rigid insulation protection sleeve and insulating casing passes through fixed sealed tube to be connected.

Further, the front end of the hard insulating protective sleeve is completely coated or partially coated on the temperature-resistant insulating section, and the rear end of the protective sleeve is completely coated or partially coated on the insulating section.

Further, the ion probe is applied to the condition of adopting premixed combustion, the ion probe penetrates through a metal sleeve arranged in the combustion head, mixed gas exists in the combustion head, and the ion probe is completely isolated from the mixed gas through the metal sleeve.

Further, the front end of the probe body has a preset bending degree, and the bending degree enables the needle tip to have a larger contact area with flame.

The utility model has the following advantages:

1. compared with the prior art, the shell outside the probe is divided into two parts, wherein the ceramic part serving as the temperature-resistant insulation section is short in whole and not easy to damage, and the short ceramic section enables the front end of the ion probe to still have a certain temperature-resistant distance, so that the ion probe can receive ion signals in flame.

2. The lead is arranged in the insulating shell, and is connected with the probe body, so that the resistance of the probe body is greatly reduced, the conductivity is enhanced, the signal intensity is high, and the detection sensitivity of the probe is improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.

FIG. 1 is a schematic diagram of the structure of the present utility model.

In the figure: 1. a probe body; 2. a temperature resistant insulation section; 3. a wire insulation layer; 4. a hard insulating protective sleeve; 5. fixing the sealing tube; 6. a wire; 7. a quick connector.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1, the embodiment of the utility model discloses an ion probe for flame monitoring, which comprises a probe body 1, a wire 6 connected with the probe body and an insulation shell sleeved outside the probe body, wherein the insulation shell comprises a temperature-resistant insulation section 2 close to the detection end side of the probe body and an insulation section 3 far away from the detection end side of the probe body, a hard insulation protection sleeve 4 is arranged outside the insulation shell, and the temperature-resistant insulation section and the insulation section respectively have preset lengths or have preset proportional relations. In this embodiment, the temperature-resistant insulation section is based on the temperature-resistant distance of a specific application scenario, and the wire is a conventional wire, and is connected to an external detector at its terminal through a quick connector 7.

The junction of rigid insulation protection sleeve and insulating housing passes through fixed sealed tube 5 to be connected.

The front end of the hard insulating protective sleeve is completely coated or partially coated on the temperature-resistant insulating section, and the rear end of the protective sleeve is completely coated or partially coated on the insulating section. In this embodiment, the temperature-resistant section is made of ceramic, a layer of insulation section is sleeved outside the wire, the insulation section is made of a wire insulation layer, and the hard insulation protection sleeve is an electric wooden tube.

The ion probe is applied to the condition of adopting premixed combustion, and penetrates through a metal sleeve arranged in the combustion head, mixed gas exists in the combustion head, and the ion probe is completely isolated from the mixed gas through the metal sleeve. The needle front end of the probe body has a predetermined bending degree which enables the needle tip to be close to the combustion head and maintain a predetermined distance therefrom.

The embodiment can be applied to any burner device requiring electrode needles with preset lengths, such as evaporators, water heaters and the like.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims

1. The utility model provides an ion probe for flame monitoring, its characterized in that includes the probe body, the wire that links to each other with the probe body with cup joint at the outside insulating housing of two, insulating housing include be close to in the temperature resistant insulation section of probe body detection end side and keep away from the insulation section of probe body detection end side, the outside rigid insulation protective sleeve that is equipped with of insulating housing, temperature resistant insulation section has preset length respectively with the insulation section or has preset proportional relation between the two.

2. The ion probe for flame monitoring of claim 1, wherein the junction of the rigid insulating protective sleeve and the insulating housing is connected by a fixed seal tube.

3. The ion probe for flame monitoring of claim 1, wherein the front end of the hard insulating protective sleeve is fully or partially coated on the temperature resistant insulating section, and the rear end of the protective sleeve is fully or partially coated on the insulating section.

4. The ion probe for flame monitoring of claim 1, wherein the ion probe is applied to a case of premixed combustion, the ion probe passes through a metal sleeve arranged in a combustion head, a mixed gas exists in the combustion head, and the ion probe is completely isolated from the mixed gas by the metal sleeve.

5. The ion probe for flame monitoring of claim 1 or 4, wherein the front end of the probe body has a predetermined bending degree, and the bending degree enables the needle tip to have a larger contact area with the flame.