Flame detection device

Abstract

The utility model provides a flame detection device. The flame detection device comprises a furnace body, a gas pipe, a gas pipe nozzle, a flame detection mechanism, a U-shaped water tank, an ignition mechanism, a first signal transmission line and a first controller, the ignition mechanism comprises an ignition needle; the gas pipe and the gas pipe nozzle are installed in the furnace body, the gas pipe nozzle is installed at the upper end of the gas pipe, the ignition needle is arranged above the gas pipe nozzle, one end of the flame detection mechanism is located above the ignition needle, and the other end of the flame detection mechanism is connected with the first controller through a first signal transmission line; one end of the U-shaped water tank is connected with the bottom wall of the outer surface of the gas pipe nozzle, and the other end of the U-shaped water tank is connected with the bottom of the outer surface of the flame detection mechanism. It is ensured that the first signal transmission line can normally transmit the flame signal, and the accuracy of the flame signal received by the first controller is improved.

Description

Technical Field

[0001] The present application relates to the technical field of flame detection, and in particular to a flame detection device. Background Art

[0002] Tubular heating furnaces are process heating furnaces used in industries such as petroleum refining, petrochemicals, and coal chemical industry. Tubular heating furnaces are generally designed with flame detection mechanisms. Generally, flame ionization probes are used for flame detection mechanisms of tubular heating furnaces. After the tubular heating furnace is ignited, the flame ionization probe is used to detect the flame to determine whether the ignition is successful. If there is a flame signal, the ignition is stopped and the feedback detection function is started at the same time.

[0003] Among them, the flame ionization probe is arranged inside the tubular heating furnace, and the flame signal obtained by its detection needs to be transmitted to the outside through the signal transmission line. However, the fuel of the tubular heating furnace is coke oven gas, which contains a large amount of water. A lot of water will be produced during the combustion process. The water gathers on the flame ionization probe and then flows to the connection between the flame ionization probe and the signal transmission line, and flows along the signal transmission line, thereby causing damage to the signal transmission line, resulting in inaccurate detection results or no detection results. Utility Model Content

[0004] The present application provides a flame detection device to solve the technical problems in the above-mentioned background technology.

[0005] The present application provides a flame detection device, including a furnace body, a gas pipe, a gas pipe nozzle, a flame detection mechanism, a U-shaped water tank, an ignition mechanism, a first signal transmission line, and a first controller;

[0006] The ignition mechanism comprises: an ignition needle;

[0007] The gas pipe and the gas pipe nozzle are installed inside the furnace body, the gas pipe nozzle is installed at the upper end of the gas pipe, the ignition needle is arranged above the gas pipe nozzle, one end of the flame detection mechanism is located above the ignition needle, and the other end of the flame detection mechanism is connected to the first controller through the first signal transmission line;

[0008] One end of the U-shaped water tank is connected to the bottom wall of the outer surface of the gas pipe nozzle, and the other end of the U-shaped water tank is connected to the bottom of the outer surface of the flame detection mechanism.

[0009] Optionally, the flame detection mechanism includes: a flame ionization probe and a probe insulator;

[0010] One end of the flame ionization probe is located above the ignition needle, and the other end of the flame ionization probe is connected to the first controller through the first signal transmission line. The probe insulator is arranged at the connection between the other end of the flame ionization probe and the first signal transmission line, and the other end of the U-shaped water tank is connected to the bottom of the probe insulator.

[0011] Optionally, a drainage hole is provided at the bottom of the U-shaped water tank, and a water outlet hole is provided at the bottom of the furnace body, and the position of the water outlet hole corresponds to the position of the drainage hole.

[0012] Optionally, one end of the U-shaped water trough does not exceed the side wall of the gas pipe nozzle, and the other end of the U-shaped water trough does not exceed the side wall of the flame detection mechanism.

[0013] Optionally, the ignition mechanism further comprises: an ignition pin insulator, a second signal transmission line and a second controller;

[0014] One end of the ignition needle is located above the gas pipe nozzle, the other end of the ignition needle is connected to the second controller through the second signal transmission line, and the ignition needle insulator is arranged at the connection between the other end of the ignition needle and the second signal transmission line.

[0015] Optionally, the flame detection device further comprises: a first mounting plate;

[0016] The first mounting plate is fixedly connected to the side wall of the furnace body. Three holes are arranged on the first mounting plate. The ignition needle insulator, the gas pipe nozzle and the probe insulator are installed in the three holes on the first mounting plate in a one-to-one correspondence.

[0017] Optionally, the flame detection device further comprises: a second mounting plate;

[0018] The second mounting plate is fixedly connected to the side wall of the furnace body. Three holes are arranged on the second mounting plate. The first signal transmission line, the second signal transmission line and the gas pipe are installed in the three holes on the second mounting plate in a one-to-one correspondence.

[0019] In this embodiment, the flame detection device includes a furnace body, a gas pipe, a gas pipe nozzle, a flame detection mechanism, a U-shaped water tank, an ignition mechanism, a first signal transmission line, and a first controller; the ignition mechanism includes: an ignition needle; the gas pipe and the gas pipe nozzle are installed inside the furnace body, the gas pipe nozzle is installed at the upper end of the gas pipe, the ignition needle is arranged above the gas pipe nozzle, one end of the flame detection mechanism is located above the ignition needle, and the other end of the flame detection mechanism is connected to the first controller through the first signal transmission line; one end of the U-shaped water tank is connected to the bottom wall of the outer surface of the gas pipe nozzle, and the other end of the U-shaped water tank is connected to the bottom of the outer surface of the flame detection mechanism. Compared with the prior art, the present application sets a U-shaped water groove on the bottom wall of the outer surface of the gas pipe nozzle and the bottom of the outer surface of the flame detection mechanism to collect as much water as possible generated by the combustion of coke oven gas, thereby preventing the generated water from gathering at the connection between the flame detection mechanism and the first signal transmission line, causing the water to enter the first signal transmission line and cause damage to the first signal transmission line, ensuring that the first signal transmission line can transmit the flame signal normally, and improving the accuracy of the flame signal received by the first controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A schematic diagram of the structure of a flame detection device provided in one embodiment of the present application;

[0022] Figure 2 A schematic cross-sectional view of a flame detection device provided in one embodiment of the present application;

[0023] Figure 3 A schematic structural diagram of a U-shaped water tank of a flame detection device provided in one embodiment of the present application.

[0024] In the figure: 1-gas pipe; 2-gas pipe nozzle; 3-flame detection mechanism; 4-U-shaped water tank; 5-ignition needle; 6-first signal transmission line; 7-first controller; 8-furnace body; 9-flame ion probe; 10-probe insulator; 11-water outlet; 12-drain hole; 13-ignition needle insulator; 14-second signal transmission line; 15-second controller; 16-first mounting plate; 17-flame. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application is clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present application.

[0026] Figure 1 This is a schematic diagram of the structure of a flame detection device provided in one embodiment of the present application. Figure 1 As shown, combined Figure 2 and Figure 3 The device comprises: a furnace body 8, a gas pipe 1, a gas pipe nozzle 2, a flame detection mechanism 3, a U-shaped water tank 4, an ignition mechanism, a first signal transmission line 6 and a first controller 7;

[0027] The ignition mechanism comprises: an ignition needle 5;

[0028] The gas pipe 1 and the gas pipe nozzle 2 are installed inside the furnace body 8. The gas pipe nozzle 2 is installed at the upper end of the gas pipe 1. The ignition needle 5 is arranged above the gas pipe nozzle 2. One end of the flame detection mechanism 3 is located above the ignition needle 5. The other end of the flame detection mechanism 3 is connected to the first controller 7 through the first signal transmission line 6.

[0029] One end of the U-shaped water tank 4 is connected to the bottom wall of the outer surface of the gas pipe nozzle 2 , and the other end of the U-shaped water tank 4 is connected to the bottom of the outer surface of the flame detection mechanism 3 .

[0030] In this embodiment, a tubular heating furnace is taken as an example for description.

[0031] The fuel of the tubular heating furnace is coke oven gas. The gas pipe 1 is used to transport the coke oven gas into the tubular heating furnace. One end of the gas pipe 1 is connected to the equipment outside the furnace for transporting coke oven gas, and the other end is provided with a gas pipe nozzle 2, and the coke oven gas is sprayed out from the gas pipe nozzle 2.

[0032] Among them, the size of the gas pipe nozzle 2 is larger than that of the gas pipe 1, so that a large amount of coke oven gas output from the gas pipe 1 can be dispersedly output, which is convenient for ignition of the ignition needle 5, and can also prevent the coke oven gas from gathering together, resulting in the problem of the flame 17 being too large to be controlled after the ignition needle 5 is ignited.

[0033] The ignition needle 5 is used to ignite the coke oven gas sprayed from the gas pipe nozzle 2. It is generally arranged in an L shape. The ignition needle 5 is arranged above the gas pipe nozzle 2. When coke oven gas is sprayed from the gas pipe nozzle 2, the coke oven gas is ignited through the ignition needle 5 to heat the tubular heating furnace.

[0034] Specifically, the ignition needle 5 is generally inserted into one side above the gas pipe nozzle 2, rather than into the middle of the gas pipe nozzle 2, so that the ignition needle 5 can be prevented from affecting the ejection of the coke oven gas from the gas pipe nozzle 2, thereby affecting the combustion state of the flame 17, while being able to ignite the coke oven gas. In addition, the ignition needle 5 needs to be spaced a certain distance from the gas pipe nozzle 2 in the vertical direction to ensure that the coke oven gas can be fully burned.

[0035] Among them, the flame detection mechanism 3 is used to detect whether the ignition needle 5 has ignited the coke oven gas sprayed from the gas pipe nozzle 2. One end of the flame detection mechanism 3 is arranged above the ignition needle 5 located above the gas pipe nozzle 2, and is higher than the ignition needle 5 by a certain distance to ensure that the flame detection mechanism 3 can extend into the flame 17, thereby preventing the flame detection mechanism 3 from being unable to measure the flame 17 generated above the gas pipe nozzle 2.

[0036] Furthermore, the distance between the flame detection mechanism 3 and the ignition needle 5 in the vertical direction can be set to be greater than 5 cm and within the range of the size of the flame 17 . The specific distance is set according to actual conditions, such as the size of the flame 17 .

[0037] Among them, the outside of the first signal transmission line 6 is wrapped with a high-temperature resistant and insulating material, such as ceramic, graphite, etc. The length of the first signal transmission line 6 is set according to the working conditions on site, and it is necessary to ensure that the flame detection mechanism 3 can be connected to the first controller 7.

[0038] The U-shaped water tank 4 is arranged between the bottom of the gas pipe nozzle 2 and the bottom of the flame detection mechanism 3, and is used to collect water generated when the gas is burned. Specifically, one end of the U-shaped water tank 4 is connected to the bottom of the outer surface of the gas pipe nozzle 2 (i.e., the connection between the gas pipe nozzle 2 and the gas pipe 1), and the other end is connected to the bottom of the outer surface of the flame detection mechanism 3. In addition, the U-shaped water tank 4 is made of high-temperature insulating and anti-corrosion materials.

[0039] Furthermore, the bottom wall of the outer surface of the gas pipe nozzle 2 and the bottom of the outer surface of the flame detection mechanism 3 can be on the same horizontal line, so that the U-shaped water tank 4 can be kept horizontally arranged.

[0040] The first signal transmission line 6 passes through the bottom wall of the furnace body 8 and is connected to the first controller 7 for transmitting the flame 17 signal.

[0041] The use process of the above flame detection device is as follows:

[0042] Coke oven gas is injected into the gas pipe 1, and the coke oven gas enters the gas pipe nozzle 2 along the gas pipe 1 and is ejected from the gas pipe nozzle 2. Then, the ignition needle 5 is turned on. After the ignition needle 5 is turned on, the coke oven gas exiting the gas pipe nozzle 2 is ignited, thereby generating a flame 17. Then, the flame detection mechanism 3 detects whether a flame 17 is currently generated. When the flame 17 is detected, the flame 17 signal is transmitted to the first controller 7 through the first signal transmission line 6, so that the staff can determine the state in the furnace.

[0043] When the tubular heating furnace is working, since the coke oven gas contains a large amount of moisture, when the coke oven gas is fully burned, the generated moisture will adhere to the outer surface of the gas pipe nozzle 2 and the outer surface of the flame detection mechanism 3, and flow downward along the outer surface of the gas pipe nozzle 2 and the outer surface of the flame detection mechanism 3 under the action of gravity.

[0044] Among them, since a U-shaped water tank 4 is connected to the bottom of the outer surface of the gas pipe nozzle 2 and the bottom of the outer surface of the flame detection mechanism 3, the water on the outer surface of the gas pipe nozzle 2 and the outer surface of the flame detection mechanism 3 flows downward into the U-shaped water tank 4, thereby collecting the moisture generated by the combustion of the tubular heating furnace.

[0045] Optionally, the U-shaped water tank 4 can be detachably installed at the bottom of the outer surface of the gas pipe nozzle 2 and the bottom of the outer surface of the flame detection mechanism 3, which is convenient for the disassembly and installation of the U-shaped water tank 4. For example, when there is a lot of water in the U-shaped water tank 4, the U-shaped water tank 4 is disassembled, and the water is drained out before installation.

[0046] In this embodiment, the flame detection device includes: a furnace body 8, a gas pipe 1, a gas pipe nozzle 2, a flame detection mechanism 3, a U-shaped water tank 4, an ignition mechanism, a first signal transmission line 6, and a first controller 7; the ignition mechanism includes: an ignition needle 5; the gas pipe 1 and the gas pipe nozzle 2 are installed inside the furnace body 8, the gas pipe nozzle 2 is installed at the upper end of the gas pipe 1, the ignition needle 5 is arranged above the gas pipe nozzle 2, one end of the flame detection mechanism 3 is located above the ignition needle 5, and the other end of the flame detection mechanism 3 is connected to the first controller 7 through the first signal transmission line 6; one end of the U-shaped water tank 4 is connected to the bottom wall of the outer surface of the gas pipe nozzle 2, and the other end of the U-shaped water tank 4 is connected to the bottom of the outer surface of the flame detection mechanism 3. Compared with the prior art, the present application sets a U-shaped water trough 4 on the bottom wall of the outer surface of the gas pipe nozzle 2 and the bottom of the outer surface of the flame detection mechanism 3 to collect as much water as possible generated by the combustion of coke oven gas, thereby preventing the generated water from gathering at the connection between the flame detection mechanism 3 and the first signal transmission line 6, causing the water to enter the first signal transmission line 6 and cause damage to the first signal transmission line 6, thereby ensuring that the first signal transmission line 6 can normally transmit the flame 17 signal, thereby improving the accuracy of the flame 17 signal received by the first controller 7.

[0047] Optionally, the flame detection mechanism 3 includes: a flame ionization probe 9 and a probe insulator 10;

[0048] One end of the flame ionization probe 9 is located above the ignition needle 5, and the other end of the flame ionization probe 9 is connected to the first controller 7 through the first signal transmission line 6. The probe insulator 10 is arranged at the connection between the other end of the flame ionization probe 9 and the first signal transmission line 6, and the other end of the U-shaped water tank 4 is connected to the bottom of the probe insulator 10.

[0049] The flame ionization probe 9 is configured to be L-shaped, one end of the flame ionization probe 9 extends into the generated flame 17 , and the other end is connected to the first controller 7 via the first signal transmission line 6 .

[0050] Among them, the connection between the flame ionization probe 9 and the first signal transmission line 6 is easy to be infiltrated by water. Therefore, a probe insulator 10 is set at the connection between the flame ionization probe 9 and the first signal transmission line 6, and the other end of the U-shaped water tank 4 is connected to the bottom of the outer surface of the probe insulator 10. In this way, the connection between the flame ionization probe 9 and the first signal transmission line 6 is sealed by the probe insulator 10 to reduce the moisture entering the connection between the flame ionization probe 9 and the first signal transmission line 6.

[0051] Optionally, a drainage hole 12 is provided at the bottom of the U-shaped water tank 4 of the flame detection device, and a water outlet hole 11 is provided at the bottom of the furnace body 8 , and the position of the water outlet hole 11 corresponds to the position of the drainage hole 12 .

[0052] Among them, a drainage hole 12 is set at the bottom of the U-shaped water tank 4. When water enters the U-shaped water tank 4, the water is discharged from the drainage hole 12 at the bottom of the U-shaped water tank 4, and then, under the action of gravity, the water drips into the water outlet hole 11 and is discharged from the water outlet hole 11 to the outside of the furnace body 8.

[0053] Optionally, the diameter of the water outlet hole 11 is larger than the diameter of the drainage hole 12 , so that the water discharged from the drainage hole 12 can drip into the water outlet hole 11 .

[0054] It should be noted that the moisture generated by the combustion of coke oven gas in the tubular heating furnace can cause damage to the first signal transmission line 6. This is the result of the moisture corroding the first signal transmission line 6 for a long time. In fact, the moisture generated by the combustion is less, so it can be discharged through the drain hole 12 and the water outlet hole 11.

[0055] Furthermore, the U-shaped water tank 4 is made of insulating material to prevent other devices from being damaged due to the conduction of water in the U-shaped water tank 4 .

[0056] Optional, such as Figure 3 As shown, one end of the U-shaped water tank 4 does not exceed the side wall of the gas pipe nozzle 2, and the other end of the U-shaped water tank 4 does not exceed the side wall of the flame detection mechanism 3.

[0057] Among them, one end of the U-shaped water trough 4 does not exceed the side wall of the gas pipe nozzle 2. It can be understood that the top of one end of the U-shaped water trough 4 is set on the bottom wall of the gas pipe nozzle 2 and does not exceed the side wall of the gas pipe nozzle 2, or one end of the U-shaped water trough 4 and the side wall of the gas pipe nozzle 2 are in the same vertical direction, and water flows directly into the U-shaped water trough 4 from the side wall of the gas pipe nozzle 2 along one end of the U-shaped water trough 4.

[0058] Similarly, the other end of the U-shaped water tank 4 does not exceed the side wall of the flame detection mechanism 3. It can be understood that the top of the other end of the U-shaped water tank 4 is set at the bottom of the flame detection mechanism 3 and does not exceed the side wall of the flame detection mechanism 3, or the other end of the U-shaped water tank 4 and the side wall of the flame detection mechanism 3 are in the same vertical direction; water flows down from the side wall of the flame detection mechanism 3 and flows directly into the U-shaped water tank 4 along the other end of the U-shaped water tank 4, preventing the problem that water on the outer surface of the gas pipe nozzle 2 and the flame detection mechanism 3 cannot flow into the U-shaped water tank 4.

[0059] Optionally, the ignition mechanism of the flame detection device further includes: an ignition pin insulator 13, a second signal transmission line 14 and a second controller 15;

[0060] One end of the ignition needle 5 is located above the gas pipe nozzle 2 , and the other end of the ignition needle 5 is connected to the second controller 15 through the second signal transmission line 14 . The ignition needle insulator 13 is arranged at the connection between the other end of the ignition needle 5 and the second signal transmission line 14 .

[0061] Among them, when the ignition needle 5 needs to be used, the second controller 15 sends a signal to control the ignition needle 5 to start working, and transmits the start working signal to the ignition needle 5 through the second signal transmission line 14, and the ignition needle 5 starts working. After the ignition needle 5 ignites the gas sprayed from the gas pipe nozzle 2, the ignition needle 5 needs to be closed. When the ignition needle 5 needs to be closed, the second controller 15 sends a signal to control the ignition needle 5 to stop working, and transmits the stop working signal to the ignition needle 5 through the second signal transmission line 14, so that the ignition needle 5 stops working.

[0062] Furthermore, the second signal transmission line 14 is externally wrapped with a high temperature resistant material, such as ceramic, graphite, etc.

[0063] Optionally, the flame detection device further comprises: a first mounting plate 16;

[0064] The first mounting plate 16 is fixedly connected to the side wall of the furnace body 8 . Three holes are arranged on the first mounting plate 16 . The ignition needle insulator 13 , the gas pipe nozzle 2 and the probe insulator 10 are installed in the three holes on the first mounting plate 16 in a one-to-one correspondence.

[0065] The three holes on the first mounting plate 16 have different sizes, and the hole sizes are set according to the sizes of the ignition needle insulator 13, the gas pipe nozzle 2 and the probe insulator 10 to ensure that the three holes of the first mounting plate 16 can correspond to each device.

[0066] Optionally, the first mounting plate 16 is inside the furnace body 8 and fixedly connected to the front wall and the rear wall inside the furnace body 8 .

[0067] In this embodiment, the first mounting plate 16 not only facilitates the installation and fixing of the ignition needle insulator 13, the gas pipe nozzle 2 and the probe insulator 10 to prevent the ignition needle insulator 13, the gas pipe nozzle 2 and the probe insulator 10 from shaking, but also allows for reasonable design of the space in the furnace to improve the combustion efficiency of the tubular heating furnace.

[0068] Furthermore, the first mounting plate 16 is made of insulating material, such as ceramic, graphite, etc.

[0069] Optionally, the flame detection device further comprises: a second mounting plate;

[0070] The second mounting plate is fixedly connected to the side wall of the furnace body 8 and is located below the first mounting plate. The second mounting plate is provided with three holes. The first signal transmission line 6, the second signal transmission line 14 and the gas pipe 1 are installed in the three holes on the second mounting plate one by one.

[0071] The second mounting plate is not shown in the figure.

[0072] In this embodiment, the second mounting plate not only facilitates the installation and fixing of the first signal transmission line 6, the second signal transmission line 14 and the gas pipe 1, thereby avoiding the first signal transmission line 6, the second signal transmission line 14 and the gas pipe 1, but also allows for a reasonable design of the space within the furnace, thereby improving the combustion efficiency of the tubular heating furnace.

[0073] Finally, it should be noted that all contents not described in the technical solution of this application can be implemented using existing technologies. In addition, the above embodiments are only used to illustrate the technical solution of this application, rather than to limit it; although the application is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A flame detection device, characterized in that: include: Furnace body, gas pipe, gas pipe nozzle, flame detection mechanism, U-shaped water tank, ignition mechanism, first signal transmission line, first controller; The ignition mechanism comprises: an ignition needle; The gas pipe and the gas pipe nozzle are installed inside the furnace body, the gas pipe nozzle is installed at the upper end of the gas pipe, the ignition needle is arranged above the gas pipe nozzle, one end of the flame detection mechanism is located above the ignition needle, and the other end of the flame detection mechanism is connected to the first controller through the first signal transmission line; One end of the U-shaped water tank is connected to the bottom wall of the outer surface of the gas pipe nozzle, and the other end of the U-shaped water tank is connected to the bottom of the outer surface of the flame detection mechanism.

2. The flame detection device according to claim 1, characterized in that: The flame detection mechanism includes: a flame ionization probe and a probe insulator; One end of the flame ionization probe is located above the ignition needle, and the other end of the flame ionization probe is connected to the first controller through the first signal transmission line. The probe insulator is arranged at the connection between the other end of the flame ionization probe and the first signal transmission line, and the other end of the U-shaped water tank is connected to the bottom of the probe insulator.

3. The flame detection device according to claim 1, characterized in that: The bottom of the U-shaped water tank is provided with a drainage hole, and the bottom of the furnace body is provided with a water outlet hole, and the position of the water outlet hole corresponds to the position of the drainage hole.

4. The flame detection device according to any one of claims 1 to 3, characterized in that: One end of the U-shaped water tank does not exceed the side wall of the gas pipe nozzle, and the other end of the U-shaped water tank does not exceed the side wall of the flame detection mechanism.

5. The flame detection device according to claim 1, characterized in that: The ignition mechanism further includes: an ignition pin insulator, a second signal transmission line, and a second controller; One end of the ignition needle is located above the gas pipe nozzle, the other end of the ignition needle is connected to the second controller through the second signal transmission line, and the ignition needle insulator is arranged at the connection between the other end of the ignition needle and the second signal transmission line.

6. The flame detection device according to claim 2, characterized in that: Also includes: a first mounting plate; The first mounting plate is fixedly connected to the side wall of the furnace body. Three holes are arranged on the first mounting plate. The ignition needle insulator, the gas pipe nozzle and the probe insulator are installed in the three holes on the first mounting plate in a one-to-one correspondence.

7. The flame detection device according to claim 5, characterized in that: Also includes: A second mounting plate; The second mounting plate is fixedly connected to the side wall of the furnace body. Three holes are arranged on the second mounting plate. The first signal transmission line, the second signal transmission line and the gas pipe are installed in the three holes on the second mounting plate in a one-to-one correspondence.

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