CN216891134U - Radiant tube and annealing furnace capable of detecting leakage on line - Google Patents
Radiant tube and annealing furnace capable of detecting leakage on line Download PDFInfo
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- CN216891134U CN216891134U CN202220243783.6U CN202220243783U CN216891134U CN 216891134 U CN216891134 U CN 216891134U CN 202220243783 U CN202220243783 U CN 202220243783U CN 216891134 U CN216891134 U CN 216891134U
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Abstract
The utility model discloses a radiant tube capable of detecting leakage on line and an annealing furnace, and belongs to the technical field of radiant tube equipment. The radiant tube comprises a burner, a gas pipeline, an argon pipeline system and a tube body, wherein the burner, the gas pipeline and the argon pipeline system are arranged outside an annealing furnace, and the tube body is arranged in the annealing furnace; a detection pipeline is arranged on the combustor, and a plug is detachably connected to the free end of the detection pipeline; therefore, in the using process of the annealing furnace, the plug can be detached from the free end of the detection pipeline, the free end of the detection pipeline is provided with the insertion opening, and the sampling tube of the gas analyzer is inserted into the insertion opening, so that the detection and analysis of gas components in the radiant tube can be completed, and whether the radiant tube has cracks or not can be judged.
Description
Technical Field
The utility model relates to the technical field of radiant tube equipment, in particular to a radiant tube capable of detecting leakage on line and an annealing furnace.
Background
Cold rolling hot galvanizing, silicon steel and continuous annealing treatment lines of steel plants and other industrial furnaces and kilns commonly adopt a radiant tube indirect heating mode. The radiant tube is arranged in a furnace chamber of the annealing furnace, the radiant tube is heated by burning coal gas or other fuel gas, the radiant tube heats the heated annealing body in a heat radiation mode, and the fuel gas and the heated body are isolated by the radiant tube body, so that the composition of protective atmosphere in the annealing furnace chamber is kept stable. In the long-term combustion and use process, the situation that the radiant tube body has fine cracks can occur, and fuel gas and combustion air can infiltrate into the annealing furnace chamber from the cracks under the production state to pollute protective gas in the annealing furnace chamber, so that the defects of fatal oxidation and the like are generated on the surface of a heated body.
However, the tube body of the radiant tube cannot be touched under production conditions, and there is no direct way to find whether the tube body has cracks. In the related field, the furnace is generally stopped and cooled, and then the furnace enters a furnace chamber to be inspected by manual naked eyes, and the inspection has great defects: on one hand, due to the effect of thermal expansion and cold contraction, the fine cracks of the radiation tube body cannot be found by manual visual inspection in a cold state; on the other hand, the space in the furnace chamber is narrow, and the tube body cannot be inspected 100% by manual visual inspection.
The Chinese patent document with the application number of 2021204346502 discloses an annealing furnace radiant tube air tightness detection system, which comprises a hydrogen detection unit and a helium detection unit, wherein the hydrogen detection unit comprises a hydrogen leak detector which detects the condition of weld leakage between a radiant tube and an annealing furnace shell; the helium detection unit comprises a helium tank, a fan and a helium detector, the helium tank is connected with the fan, helium in the helium tank is distributed to each radiation tube through the fan, and the helium detector is connected with a sampling hole formed in the annealing furnace shell to detect the leakage condition of the radiation tube body.
The scheme directly samples gas in the annealing furnace from a shell of the annealing furnace, analyzes the components of the gas and judges whether the gas leaks. However, the gas temperature in the annealing furnace is relatively high, and the gas is directly sampled from the annealing furnace, so that the atmosphere in the annealing furnace is easily damaged, and the normal use of the annealing furnace is influenced.
SUMMERY OF THE UTILITY MODEL
1. Technical problem to be solved by the utility model
The utility model aims to overcome the defects that the process of detecting the leakage of a radiant tube of an annealing furnace is not convenient enough and the atmosphere in the annealing furnace is easily influenced in the prior art, and provides the radiant tube capable of detecting the leakage on line and the annealing furnace.
2. Technical scheme
In order to achieve the purpose, the technical scheme provided by the utility model is as follows:
the utility model relates to a radiant tube capable of detecting leakage online, which comprises a burner, a gas pipeline, an argon pipeline system and a tube body, wherein the burner, the gas pipeline and the argon pipeline system are arranged outside an annealing furnace; a detection pipeline is arranged on the combustor, and a plug is detachably connected to the free end of the detection pipeline; and after the plug is detached from the free end of the detection pipeline, the free end of the detection pipeline is provided for an insertion hole of a sampling tube of the gas analyzer.
Further, be provided with the exhaust emission pipeline on the combustor, the detection pipeline sets up on the exhaust emission pipeline, and with the exhaust emission pipeline is connected.
Furthermore, a micro air pump is communicated with the gas analyzer, and is used for pumping the gas in the waste gas discharge pipeline into the gas analyzer after the sampling pipe is inserted into the free end of the detection pipeline.
Furthermore, an internal thread is formed at the free end of the detection pipeline, an external thread is formed on the plug, and the free end of the detection pipeline is connected with the plug through the matching of the internal thread and the external thread.
Furthermore, the gas pipeline is communicated to the pipe body, and a second on-off valve is arranged on the gas pipeline.
Further, the argon gas pipeline system comprises an argon gas bottle and a pump, and the pump is used for pumping the argon gas in the argon gas bottle into the pipe body.
Further, the inlet of the pump is communicated with the argon gas bottle through a first pipeline, the outlet of the pump is communicated with the pipe body through a second pipeline, and a first on-off valve is arranged on the second pipeline.
The annealing furnace comprises the radiant tube.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects:
(1) the radiant tube comprises a burner, a gas pipeline, an argon pipeline system and a tube body, wherein the burner, the gas pipeline and the argon pipeline system are arranged outside an annealing furnace, and the tube body is arranged in the annealing furnace; a detection pipeline is arranged on the combustor, and a plug is detachably connected to the free end of the detection pipeline; therefore, in the using process of the annealing furnace, the plug can be detached from the free end of the detection pipeline, the free end of the detection pipeline is provided with the insertion opening, and the sampling tube of the gas analyzer is inserted into the insertion opening, so that the detection and analysis of gas components in the radiant tube can be completed, and whether the radiant tube has cracks or not can be judged.
(2) In the utility model, the gas analyzer is communicated with the micro air pump, and after the sampling tube is inserted into the free end of the detection pipeline, the micro air pump is used for pumping the gas in the waste gas discharge pipeline into the gas analyzer, so that the gas in the radiant tube can be pumped into the gas analyzer quickly, and the detection efficiency is further improved.
Drawings
FIG. 1 is a schematic view of an annealing furnace according to the present invention;
FIG. 2 is a schematic view of the fitting of the sampling tube and the plug of the present invention.
Detailed Description
For a further understanding of the utility model, reference should be made to the following detailed description taken in conjunction with the accompanying drawings and examples.
The structure, proportion, size and the like shown in the drawings are only used for matching with the content disclosed in the specification, so that the person skilled in the art can understand and read the description, and the description is not used for limiting the limit condition of the implementation of the utility model, so the method has no technical essence, and any structural modification, proportion relation change or size adjustment still falls within the scope of the technical content disclosed by the utility model without affecting the effect and the achievable purpose of the utility model. In addition, the terms "upper", "lower", "left", "right" and "middle" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the relative positions may be changed or adjusted without substantial technical changes.
The present embodiment provides a radiant tube used for a radiant heat exchanging device of an annealing furnace 100. Wherein, the radiant tube is communicated with a sampling tube 264, when the annealing furnace 100 is in an operating state, the gas in the radiant tube can be pumped into the gas analyzer 300 through the sampling tube 264, and then the gas analyzer 300 analyzes the components of the gas, thereby judging whether the radiant tube has cracks.
Specifically, referring to fig. 1, the radiant tube of the present embodiment may include a tube body 210, a burner 260, a gas line 270, an exhaust gas discharge line 263, and an argon line system. Wherein, combustor 260, gas pipeline 270, argon gas piping system, exhaust gas discharge line 263 set up outside annealing stove 100, and body 210 sets up in annealing stove 100, and combustor 260, gas pipeline 270 and argon gas piping system all communicate with body 210. The argon pipeline system is used for inputting argon into the radiant tube, and the gas pipeline 270 is used for inputting gas and other combustibles into the radiant tube; be provided with heat exchanger 261 in the combustor 260, be provided with air pipe 262 on the combustor, the combustor is used for burning the comburent of gas pipeline 270 input, and heat transfer is the gas in the radiant tube for heat exchanger 261, and air pipe 262 is used for supplementing air in to combustor 260, and exhaust emission pipeline 263 is used for discharging the waste gas after the burning.
In this embodiment, the burner 260 is further provided with a detection pipeline, a plug 265 is detachably connected to a free end of the detection pipeline, and the plug 265 is used for blocking the free end of the detection pipeline to prevent the gas in the radiant tube from overflowing from the detection pipeline in a non-detection state, i.e. a normal state.
It should be noted that the annealing furnace 100 has a protective atmosphere therein, including nitrogen, hydrogen, and inert gases. In the using process of the radiant tube of the embodiment, if it is required to detect whether the radiant tube cracks, the plug 265 can be detached from the free end of the detection pipeline, the free end of the detection pipeline can be provided for the insertion opening of the sampling tube 264 of the gas analyzer 300, and the sampling tube 264 of the gas analyzer 300 is inserted into the insertion opening, so that the content of oxygen, hydrogen, nitrogen or inert gas in the gas can be measured, and whether the radiant tube cracks or not can be judged, therefore, the detection efficiency is high, the atmosphere in the annealing furnace 100 cannot be influenced, and the gas in the annealing furnace 100 cannot escape. When the content of oxygen, hydrogen, nitrogen or inert gas is obviously different from the value under normal working conditions, the cracking phenomenon of the radiant tube can be preliminarily judged.
The gas analyzer 300 may be a hydrogen concentration detector, a nitrogen concentration detector, an inert gas concentration detector, or a device having a plurality of gas concentration detection functions. The hydrogen concentration detector, the nitrogen concentration detector and the inert gas concentration detector can be implemented according to the content disclosed in the prior art or a mode suggested by a manufacturer, as long as the concentration and the content of a certain component or a certain component in the gas can be detected, and related content is not repeated in the implementation mode.
Referring to fig. 2, as a further optimization of the present embodiment, a micro air pump may be connected to the gas analyzer 300, and after the sampling tube 264 is inserted into the free end of the detection pipeline, the micro air pump may be used to pump the gas in the exhaust gas discharge pipeline 263 into the gas analyzer 300, so that the present embodiment can quickly pump the gas in the radiant tube into the gas analyzer 300, thereby improving the detection efficiency.
Further, a detection line may be provided on the exhaust gas discharge line 263, and the detection line may communicate with the exhaust gas discharge line 263. When the detection line may be disposed on the exhaust gas discharge line 263, it is determined whether the radiant tube is cracked or leaked by extracting the exhaust gas in the exhaust gas discharge line 263 and measuring the content of nitrogen or inert gas in the exhaust gas.
As an embodiment of the connection mode of the plug 265 and the detection pipeline, an internal thread can be formed at the free end of the detection pipeline, an external thread can be formed on the plug 265, and the free end of the detection pipeline is connected with the plug 265 through the matching of the internal thread and the external thread. Of course, the free end of the detection pipeline is provided with an external thread, the plug 265 is provided with an internal thread, and the free end of the detection pipeline is connected with the plug 265 through the matching of the internal thread and the external thread.
The plug 265 and the test line may be connected by other connection methods, such as clamping or pin connection. In addition, the plug 265 may also be made of a flexible material, such as rubber or silicone material, and may plug the free end of the detection pipeline by its own elasticity.
In this embodiment, the gas line 270 is connected to the pipe 210, and a second cut-off valve 271 may be disposed on the gas line 270, and the second cut-off valve 271 may be used to open/close the gas line 270, thereby controlling the input of the combustion products such as gas. When the gas analyzer 300 is used to measure the gas components extracted from the radiant tube, the second shut-off valve 271 may be closed to shut off the input of the combustion products, and then the radiant tube may be subjected to on-line leak detection.
In the present embodiment, the argon gas piping system includes an argon gas cylinder 220 and a pump 230, and the pump 230 is configured to pump the argon gas in the argon gas cylinder 220 into the tube 210. More specifically, the inlet of the pump 230 may be communicated with the argon cylinder 220 through a first pipe 240, the outlet of the pump 230 may be communicated with the tube 210 through a second pipe 250, and a first on-off valve 251 is disposed on the second pipe 250, and the first on-off valve 251 is used to control the opening/closing of the second pipe 250, thereby controlling the input of argon gas.
The present embodiment also provides an annealing furnace 100, and a radiant tube for heating a workpiece is provided in the annealing furnace 100, and the radiant tube is the radiant tube in the present embodiment.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the utility model, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the utility model.
Claims (8)
1. A radiant tube capable of detecting leakage online is characterized in that: the annealing furnace comprises a burner, a gas pipeline, an argon pipeline system and a pipe body, wherein the burner, the gas pipeline and the argon pipeline system are arranged outside the annealing furnace, and the pipe body is arranged in the annealing furnace; a detection pipeline is arranged on the combustor, and a plug is detachably connected to the free end of the detection pipeline; and after the plug is detached from the free end of the detection pipeline, the free end of the detection pipeline is provided for an insertion opening of a sampling tube of the gas analyzer.
2. A radiant tube capable of on-line leak detection as defined in claim 1, wherein: be provided with the exhaust emission pipeline on the combustor, the detection pipeline sets up exhaust emission pipeline is last, and with the exhaust emission pipeline intercommunication.
3. A radiant tube capable of on-line leak detection as defined in claim 2, wherein: the gas analyzer is communicated with a miniature air pump, the sampling tube is inserted into the free end of the detection pipeline, and the miniature air pump is used for pumping the gas in the waste gas discharge pipeline into the gas analyzer.
4. A radiant tube capable of on-line leak detection as defined in claim 2 or 3, wherein: the free end of the detection pipeline is provided with an internal thread, the plug is provided with an external thread, and the free end of the detection pipeline is connected with the plug through the matching of the internal thread and the external thread.
5. A radiant tube capable of on-line leak detection as defined in claim 1, wherein: the gas pipeline is communicated to the pipe body, and a second on-off valve is arranged on the gas pipeline.
6. A radiant tube capable of on-line leak detection as defined in claim 1, wherein: the argon gas pipeline system comprises an argon gas bottle and a pump, and the pump is used for pumping argon gas in the argon gas bottle into the pipe body.
7. A radiant tube capable of on-line leak detection as defined in claim 6, wherein: the inlet of the pump is communicated with the argon bottle through a first pipeline, the outlet of the pump is communicated with the pipe body through a second pipeline, and a first on-off valve is arranged on the second pipeline.
8. An annealing furnace, characterized in that: a radiant tube according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220243783.6U CN216891134U (en) | 2022-01-29 | 2022-01-29 | Radiant tube and annealing furnace capable of detecting leakage on line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220243783.6U CN216891134U (en) | 2022-01-29 | 2022-01-29 | Radiant tube and annealing furnace capable of detecting leakage on line |
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| Publication Number | Publication Date |
|---|---|
| CN216891134U true CN216891134U (en) | 2022-07-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220243783.6U Active CN216891134U (en) | 2022-01-29 | 2022-01-29 | Radiant tube and annealing furnace capable of detecting leakage on line |
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| Country | Link |
|---|---|
| CN (1) | CN216891134U (en) |
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