CN111664471A - Indirect ignition preheating system - Google Patents
Indirect ignition preheating system Download PDFInfo
- Publication number
- CN111664471A CN111664471A CN202010645453.5A CN202010645453A CN111664471A CN 111664471 A CN111664471 A CN 111664471A CN 202010645453 A CN202010645453 A CN 202010645453A CN 111664471 A CN111664471 A CN 111664471A
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- China
- Prior art keywords
- ignition
- pipe
- flame
- gas supply
- gas
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q3/00—Igniters using electrically-produced sparks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/38—Torches, e.g. for brazing or heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/48—Nozzles
Abstract
The invention discloses an indirect ignition preheating system.A combustible gas is conveyed inside a gas supply main pipe, flame ejectors for ejecting fuel gas are arranged on the gas supply main pipe at intervals, and flame ejected by the flame ejectors after being ignited is used for preheating a corresponding structure; the ignition auxiliary pipe is made of a conductive pipe with a pipe diameter smaller than that of the gas supply main pipe, can transmit electric sparks and is internally used for conveying combustible gas; the ignition section of the ignition auxiliary pipe is arranged side by side with the flame ejector, and the ignition section is provided with an ignition jet hole corresponding to the flame ejector and used for jetting gas outwards; the igniter is close to the ignition auxiliary pipe and can generate electric sparks, gas sprayed by the ignition auxiliary pipe is ignited through the electric sparks, all the spray holes on all the ignition auxiliary pipes are ignited through one igniter, flame sprayed by the spray holes further ignites the flame injector, so that the flame injector is indirectly ignited, a plurality of flame injectors are synchronously ignited, and the ignition efficiency is improved.
Description
Technical Field
The invention relates to the technical field of ignition equipment, in particular to an indirect ignition preheating system.
Background
When the hydraulic support structural member adopts a low-alloy high-strength steel plate, the preheating requirement is often met, namely, a welding part and a peripheral area are heated to 100-200 ℃ before welding, and then welding is started. The preheating can effectively prevent the cracks and deformation of welding. Common structure preheating mode has the heating furnace to preheat, flame preheats, and the heating furnace preheats and is applicable to the structure wholly and preheats, and flame preheats and adopts single-end preheating torch, and the structure is heated inhomogeneously, and production efficiency is low, and local overheat still can cause inside grain structure thick, and welding effect is poor.
The common preheating torches are used independently, a plurality of flame nozzles are arranged in the length direction of a pipeline for conveying combustible gas, each nozzle needs to be ignited one by one in the traditional ignition mode, so that the ignition efficiency is low, synchronous ignition cannot be realized, and the preheating efficiency is influenced.
For those skilled in the art, how to achieve multi-nozzle synchronous ignition is a technical problem to be solved at present.
Disclosure of Invention
The invention provides an indirect ignition preheating system, which leads a plurality of flame ejectors to ignite synchronously by igniting an ignition secondary pipe through electric sparks and indirectly igniting an air supply main pipe through the ignition secondary pipe, thereby improving the ignition efficiency, and the specific scheme is as follows:
an indirect-fire preheat system, comprising:
the gas supply main pipe is internally used for conveying combustible gas, and flame ejectors for ejecting fuel gas are arranged on the gas supply main pipe at intervals;
the ignition secondary pipe is made of a conductive pipe material with a pipe diameter smaller than that of the gas supply main pipe, and the ignition secondary pipe is used for conveying combustible gas inside; the ignition auxiliary pipe comprises a pilot section arranged side by side with the flame ejector, and a pilot injection hole for injecting gas outwards is arranged on the pilot section corresponding to the flame ejector;
and the igniter is close to the auxiliary ignition pipe and can generate electric sparks to ignite the gas sprayed from the auxiliary ignition pipe.
Optionally, the auxiliary ignition pipe is an aluminum alloy pipe, and the pipe diameter is not more than 30 mm.
Optionally, an electromagnetic valve and a manual stop valve are respectively arranged on the main gas supply pipe and the auxiliary ignition pipe.
Optionally, a temperature sensor is arranged at a fire hole of the flame ejector, and when the temperature of the temperature sensor is higher than a set value, the controller controls the electromagnetic valve on the gas supply main pipe to close to reduce the flow.
Optionally, the flame ejector comprises a nozzle and an outer casing surrounding the nozzle, the lower part of the outer casing being circumferentially open with an aperture for air intake.
Optionally, the main gas supply pipe and the auxiliary ignition pipe are fixed on the same bracket.
The invention provides an indirect ignition preheating system, wherein the inside of a gas supply main pipe is used for conveying combustible gas, flame ejectors for ejecting fuel gas are arranged on the gas supply main pipe at intervals, and flame ejected by the flame ejectors after being ignited is used for preheating a corresponding structure; the ignition auxiliary pipe is made of a conductive pipe with a pipe diameter smaller than that of the gas supply main pipe, can transmit electric sparks and is internally used for conveying combustible gas; the ignition section of the ignition auxiliary pipe is arranged side by side with the flame ejector, and the ignition section is provided with an ignition jet hole corresponding to the flame ejector and used for jetting gas outwards; the igniter is close to the ignition auxiliary pipe and can generate electric sparks, gas sprayed by the ignition auxiliary pipe is ignited through the electric sparks, all the spray holes on all the ignition auxiliary pipes are ignited through one igniter, flame sprayed by the spray holes further ignites the flame injector, so that the flame injector is indirectly ignited, a plurality of flame injectors are synchronously ignited, and the ignition efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a front view of an indirect-ignition preheat system provided by the present invention;
fig. 2 is a cross-sectional view taken along the line a-a in fig. 1.
The figure includes:
the device comprises a main gas supply pipe 1, a flame ejector 11, a nozzle 111, an outer cover 112, an opening 113, an auxiliary ignition pipe 2, an igniter 3, an electromagnetic valve 4, a manual stop valve 5, a temperature measuring sensor 6 and a bracket 7.
Detailed Description
The invention has the core that the invention provides an indirect ignition preheating system, which leads a plurality of flame ejectors to ignite synchronously by igniting the auxiliary ignition pipe through electric sparks and indirectly igniting the main gas supply pipe through the auxiliary ignition pipe, thereby improving the ignition efficiency.
In order to make those skilled in the art better understand the technical solution of the present invention, the indirect-ignition preheating system of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a front view of an indirect-ignition preheat system provided by the present invention; FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1; the indirect ignition preheating system comprises a main gas supply pipe 1, an auxiliary ignition pipe 2, an igniter 3 and the like, wherein the pipe diameter of the main gas supply pipe 1 is larger than that of the auxiliary ignition pipe 2.
The gas supply main pipe 1 is used for conveying combustible gas, and the gas quantity conveyed inside the gas supply main pipe 1 is large and is mainly used for preheating after ignition; the gas supply main pipe 1 is provided with flame sprayers 11 for spraying gas at intervals, the gas in the gas supply main pipe 1 is sprayed out from the flame sprayers 11, and the gas sprayed out from the flame sprayers 11 is used for preheating structural members such as a hydraulic support and the like after being ignited; the flame injectors 11 are arranged in a row along the length of the main gas supply pipe 1, and therefore a plurality of flame injectors 11 are provided on each main gas supply pipe 1.
The ignition auxiliary pipe 2 is made of a conductive pipe material with a pipe diameter smaller than that of the gas supply main pipe 1, and electric sparks can be conducted along the ignition auxiliary pipe 2; the ignition auxiliary pipe 2 is used for conveying combustible gas, and the ignition auxiliary pipe 2 and the gas supply main pipe 1 can convey the same type of gas.
The ignition auxiliary pipe 2 comprises a pilot section which is arranged side by side with the flame injector 11, and the pilot section and the part of the gas supply main pipe 1, which is provided with the flame injector 11, are approximately close to each other and are kept parallel; the pilot section is provided with pilot injection holes corresponding to the flame injectors 11 for injecting gas outwards, and the injection holes face the flame injectors 11.
The igniter 3 is close to the auxiliary ignition pipe 2 and can generate electric sparks to ignite the gas sprayed out of the auxiliary ignition pipe 2; the auxiliary ignition tube 2 is made of a material having a good electric conductivity, and the electric spark generated by the igniter 3 is transmitted along the auxiliary ignition tube 2, so that the gas ejected from the auxiliary ignition tube 2 can be ignited almost synchronously, and the auxiliary ignition tube 2 can eject flame.
The flame is sprayed out from the spray hole of the ignition secondary pipe 2 to ignite the flame injector 11, so that the flame injector 11 is ignited, and after the ignition, the corresponding structure can be used for heating. According to the invention, the ignition auxiliary pipe 2 is arranged, the igniter 3 can ignite the whole ignition auxiliary pipe 2 at one time, and the flame injector 11 is indirectly ignited through the ignition auxiliary pipe 2, so that the flame injectors 11 on the same gas supply main pipe 1 are approximately synchronously ignited, thus the ignition efficiency is greatly improved, the flame injectors do not need to be ignited one by one, and the ignition process has visual characteristics and is more visual.
The ignition auxiliary pipe 2 is an aluminum alloy pipe, the pipe diameter is small and not larger than 30mm, the electric loss can be effectively reduced, and the transmission of electric sparks along the pipe is facilitated. The pipe diameter of the auxiliary ignition pipe 2 is small, meanwhile, gas can be transmitted in a concentrated mode, ignition operation can be achieved only through less gas supply, and after ignition, the auxiliary ignition pipe 2 can stop gas supply.
As shown in fig. 1, the gas supply main pipe 1 and the ignition auxiliary pipe 2 are respectively provided with an electromagnetic valve 4 and a manual stop valve 5, and the electromagnetic valves 4 arranged on the gas supply main pipe 1 and the ignition auxiliary pipe 2 are respectively and independently controlled by a controller to be switched on and off so as to control the supply of gas; the manual cut-off valve 5 can open or close the air passage by manual operation, providing double insurance.
Furthermore, the temperature sensor 6 is arranged at the fire hole of the flame ejector 11, the temperature sensor 6 is arranged close to the workpiece, the signal of the temperature sensor 6 is transmitted to the controller, and when the temperature of the temperature sensor 6 is higher than a set value, the controller controls the electromagnetic valve 4 on the gas supply main pipe 1 to be closed to reduce the flow, so that overheating is prevented, and automatic operation can be realized.
When ignition is needed, the controller controls the electromagnetic valve 4 on the main gas supply pipe 1 and the auxiliary ignition pipe 2 to be opened, controls the igniter 3 to be started to generate electric sparks, ignites the auxiliary ignition pipe 2 integrally, and further ignites the flame ejector 11 on the main gas supply pipe 1 by the auxiliary ignition pipe 2; after the flame ejector 11 is ignited, the controller controls the electromagnetic valve 4 on the ignition auxiliary pipe 2 to cut off the air supply; the temperature sensor 6 continuously monitors the temperature of the workpiece, and the air supply main pipe 1 cuts off air supply when the temperature is too high, so that the temperature is prevented from being too high.
As shown in fig. 2, the flame ejector 11 of the present invention includes a nozzle 111 and a casing 112, the casing 112 is cylindrical, the nozzle 111 is located in the middle, the nozzle 111 is surrounded by the casing 112, the lower portion of the casing 112 is provided with openings 113 for air intake along the circumferential direction, oxygen inside the casing 112 is consumed continuously by combustion, a negative pressure environment is formed inside, and oxygen is supplemented through the openings 113 provided along the circumferential direction of the lower portion of the casing 112 without an external oxygen pipeline.
The main gas supply pipe 1 and the auxiliary ignition pipe 2 are fixed on the same bracket 7, and the position stability of the main gas supply pipe 1 and the auxiliary ignition pipe 2 is maintained. The invention is illustrated by taking the example that one main gas supply pipe 1 and one auxiliary ignition pipe 2 form a group which are matched with each other, for practical application, a plurality of groups can be arranged, and each group adopts the same structure.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. An indirect-ignition preheat system, comprising:
the gas supply device comprises a gas supply main pipe (1), wherein the gas supply main pipe (1) is internally used for conveying combustible gas, and flame ejectors (11) for ejecting fuel gas are arranged on the gas supply main pipe (1) at intervals;
the ignition auxiliary pipe (2) is made of a conductive pipe with a pipe diameter smaller than that of the gas supply main pipe (1), and is used for conveying combustible gas inside; the ignition auxiliary pipe (2) comprises an ignition section arranged side by side with the flame injector (11), and an ignition spray hole for spraying gas outwards is arranged on the ignition section corresponding to the flame injector (11);
and the igniter (3) is close to the auxiliary ignition pipe (2) and can generate electric sparks to ignite the gas sprayed from the auxiliary ignition pipe (2).
2. The indirect-ignition preheating system of claim 1, wherein the auxiliary ignition pipe (2) is an aluminum alloy pipe with a pipe diameter of not more than 30 mm.
3. The indirect-ignition preheating system of claim 1, wherein an electromagnetic valve (4) and a manual stop valve (5) are respectively arranged on the main gas supply pipe (1) and the auxiliary ignition pipe (2).
4. The indirect ignition preheating system of claim 3, wherein a temperature sensor (6) is arranged at a fire hole of the flame ejector (11), and when the temperature of the temperature sensor (6) is higher than a set value, a controller controls the electromagnetic valve (4) on the main gas supply pipe (1) to be closed to reduce the flow.
5. The indirect-ignition preheating system of claim 1, wherein the flame ejector (11) comprises a nozzle (111) and a housing (112), the housing (112) surrounding the nozzle (111), a lower portion of the housing (112) being circumferentially open with an opening (113) for intake air.
6. Indirect ignition preheating system according to claim 5, characterized in that the main gas supply pipe (1) and the secondary ignition pipe (2) are fixed to the same support (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010645453.5A CN111664471B (en) | 2020-07-07 | 2020-07-07 | Indirect ignition preheating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010645453.5A CN111664471B (en) | 2020-07-07 | 2020-07-07 | Indirect ignition preheating system |
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| Publication Number | Publication Date |
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| CN111664471A true CN111664471A (en) | 2020-09-15 |
| CN111664471B CN111664471B (en) | 2022-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010645453.5A Active CN111664471B (en) | 2020-07-07 | 2020-07-07 | Indirect ignition preheating system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040048215A1 (en) * | 2001-06-07 | 2004-03-11 | Wong Chi Lam | Torch lighter for cigar |
| CN101922713A (en) * | 2010-08-30 | 2010-12-22 | 中国人民解放军总后勤部军需装备研究所 | Propane gas burner ignited by pilot flame |
| CN201695996U (en) * | 2009-12-17 | 2011-01-05 | 中国石油化工股份有限公司 | Oil well heating furnace automatic ignition device |
| CN105509052A (en) * | 2015-11-30 | 2016-04-20 | 江苏大学 | Novel burner with arc-shaped body jetting device |
| CN110566983A (en) * | 2019-07-30 | 2019-12-13 | 江苏中圣高科技产业有限公司 | Integral automatic ignition pilot lamp |
| CN209773771U (en) * | 2018-12-19 | 2019-12-13 | 山东祺龙海洋石油钢管股份有限公司 | Preheating device before marine riser girth welding |
-
2020
- 2020-07-07 CN CN202010645453.5A patent/CN111664471B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040048215A1 (en) * | 2001-06-07 | 2004-03-11 | Wong Chi Lam | Torch lighter for cigar |
| CN201695996U (en) * | 2009-12-17 | 2011-01-05 | 中国石油化工股份有限公司 | Oil well heating furnace automatic ignition device |
| CN101922713A (en) * | 2010-08-30 | 2010-12-22 | 中国人民解放军总后勤部军需装备研究所 | Propane gas burner ignited by pilot flame |
| CN105509052A (en) * | 2015-11-30 | 2016-04-20 | 江苏大学 | Novel burner with arc-shaped body jetting device |
| CN209773771U (en) * | 2018-12-19 | 2019-12-13 | 山东祺龙海洋石油钢管股份有限公司 | Preheating device before marine riser girth welding |
| CN110566983A (en) * | 2019-07-30 | 2019-12-13 | 江苏中圣高科技产业有限公司 | Integral automatic ignition pilot lamp |
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| Publication number | Publication date |
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| CN111664471B (en) | 2022-03-15 |
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