Safety protection type furnace top igniter

Abstract

The utility model discloses a safety protection type furnace top igniter, which relates to the technical field of blast furnace smelting and particularly comprises an igniter rod body, one end of the igniter rod body is fixedly connected with an air uniformizing pipe, the other end of the air uniformizing pipe is fixedly connected with an ignition pipe, and the other end of the ignition pipe is movably connected with a baffle plate. Ignition cavities are evenly formed in the ignition pipe, first through holes matched with the ignition cavities are formed in the baffle, and inner cavities of the ignition cavities communicate with an inner cavity of the air uniformizing pipe. According to the safety protection type furnace top igniter, through the arrangement of the cooling pipe and the cooling disc, in the using process of the igniter, the cooling disc can spray out cooling gas to cool the igniter rod body and the air uniformizing pipe, the service life of the igniter is prolonged, and the cooling gas can reduce the concentration and temperature of coal gas around the igniter rod body and the air uniformizing pipe; and gas combustion at the igniter rod body and the air uniformizing pipe is avoided, and the igniter is further protected.

Description

Technical Field

[0001] This utility model relates to the field of blast furnace smelting technology, specifically a safety protection furnace top firearm. Background Technology

[0002] Currently, during the production process of a blast furnace, when a malfunction occurs and an emergency shutdown or planned maintenance is required, the air supply inside the furnace must be temporarily stopped, and the furnace top manhole must be opened for inspection after steam purging. However, at this time, there may still be high-temperature coal gas inside the blast furnace. In order to prevent accidents such as coal gas poisoning or coal gas explosion, the furnace top ignition operation must be carried out.

[0003] In related technologies, when igniting a blast furnace, the igniter is usually inserted into the blast furnace through the ignition port to ignite the residual gas inside. However, since current igniters typically lack gas detection capabilities, operators cannot ascertain the gas content around the igniter during use. This leads to an inability to control the insertion depth of the igniter. If the igniter is inserted too shallowly, the flame cannot directly contact the gas inside the furnace, reducing the ignition effect. If the igniter is inserted too deeply, the gas around the igniter will be ignited, and the igniter will be engulfed by flames, affecting its service life. Based on this, this application proposes a safety-protected furnace top igniter. Utility Model Content

[0004] This invention provides a safe and protective furnace top igniter, which solves the problems mentioned in the background art, such as the igniter not having a gas detection function, the operator not being able to accurately control the insertion amount of the igniter, and the gas around the igniter being easily ignited, causing the igniter to be engulfed by flames and affecting the service life of the igniter.

[0005] This utility model provides the following technical solution: a safety-protected furnace top igniter, including an igniter rod, one end of which is fixedly connected to a distribution pipe, the other end of which is fixedly connected to an ignition pipe, the other end of which is movably connected to a baffle, ignition chambers are evenly distributed on the ignition pipe, a through hole adapted to the ignition chamber is provided on the baffle, the inner cavity of the ignition chamber communicates with the inner cavity of the distribution pipe, a gas inlet is provided on the side of the ignition chamber near the distribution pipe, a cooling plate is fixedly connected to the outside of the ignition pipe, the cooling plate is located on the side of the gas inlet near the distribution pipe, and spray holes are evenly distributed on the side of the cooling plate away from the gas inlet.

[0006] A combustible gas detector is fixedly connected inside the cavity of the igniter rod. A detection cavity is provided on the ignition tube. The detection probe of the combustible gas detector is located on the side of the detection cavity near the baffle. A through hole two that is adapted to the detection cavity is provided on the baffle.

[0007] An air inlet pipe and a cooling pipe are fixed on the igniter rod. The other end of the air inlet pipe extends into the inner cavity of the air distribution pipe, and the other end of the cooling pipe extends into the inner cavity of the cooling plate.

[0008] Preferably, the end of the air distribution duct near the ignition tube is provided with connecting holes evenly, and the ignition chamber is connected to the inner cavity of the air distribution duct through the connecting holes.

[0009] Preferably, a rotating shaft is movably connected to the middle of the ignition tube, one end of the rotating shaft is fixedly connected to a baffle, the other end of the rotating shaft is fixedly connected to the end of the output shaft of a rotating motor, and the other end of the rotating motor is fixedly connected to a fan duct.

[0010] Preferably, when the first through hole overlaps with the ignition chamber, the detection chamber and the second through hole are staggered; when the detection chamber and the second through hole overlap, the first through hole and the ignition chamber are staggered.

[0011] Preferably, the outer surface of the igniter rod, the surface of the ignition tube, the inner wall of the ignition chamber, the inner wall of the detection chamber, the outer surface of the air distribution tube, the outer surface of the cooling tube, and the outer surface of the air inlet tube are all coated with a heat-insulating coating.

[0012] Preferably, the outer diameter of the cooling plate is larger than the outer diameter of the igniter rod.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This safety-protected furnace top igniter, through the setting of cooling pipe and cooling plate, allows the cooling plate to spray cooling gas to cool the igniter rod and the air distribution pipe during use, extending the service life of the igniter. In addition, the cooling gas can reduce the gas concentration and gas temperature around the igniter rod and the air distribution pipe, preventing the gas from burning at the igniter rod and the air distribution pipe, thus further protecting the igniter.

[0015] 2. This safety-protected furnace top igniter, through the setting of a combustible gas detector, can detect the gas concentration around the ignition tube in real time, which makes it easier for the staff to accurately control the insertion amount of the igniter and improve ignition efficiency; through the setting of a heat insulation coating, the igniter can be protected, reducing the impact of heat in the blast furnace on the igniter and extending the service life of the igniter. Attached Figure Description

[0016] Figure 1 This is a front view of the structure of this utility model;

[0017] Figure 2 The structure of this utility model Figure 1 Rear view illustration;

[0018] Figure 3The structure of this utility model Figure 1 Explosion diagram;

[0019] Figure 4 This is a schematic diagram of the air distribution duct structure of this utility model;

[0020] Figure 5 The structure of this utility model Figure 4 Cross-sectional view.

[0021] In the diagram: 1. Igniter rod; 2. Air distribution duct; 3. Ignition tube; 4. Baffle; 5. Ignition chamber; 6. Rotating motor; 7. Gas inlet hole; 8. Cooling pipe; 9. Cooling plate; 10. Air inlet duct; 11. Through hole one; 12. Through hole two; 13. Combustible gas detector; 14. Connection hole. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] This utility model provides a safety-protected furnace top igniter, including an igniter rod 1. One end of the igniter rod 1 is fixedly connected to an air distribution pipe 2, and the other end of the air distribution pipe 2 is fixedly connected to an ignition pipe 3. The other end of the ignition pipe 3 is movably connected to a baffle 4. A detection chamber is provided on the ignition pipe 3, and ignition chambers 5 are evenly distributed on the ignition pipe 3. The baffle 4 is provided with a through hole 11 adapted to the ignition chamber 5 and a through hole 12 adapted to the detection chamber. When the through hole 11 overlaps with the ignition chamber 5, the detection chamber and the through hole 12 are offset. When the detection chamber and the through hole 12 overlap, the through hole 11 and the ignition chamber 5 are offset. With this configuration, during the ignition process, the baffle 4 can shield the detection chamber, and during the advance and retraction of the igniter, the baffle 4 can shield the ignition chamber 5, preventing the air in the ignition chamber 5 from affecting the combustible gas detection results.

[0024] A rotating shaft is movably connected to the middle of the ignition tube 3. One end of the rotating shaft is fixedly connected to the baffle 4, and the other end of the rotating shaft is fixedly connected to the end of the output shaft of the rotating motor 6 through a reducer. The other end of the rotating motor 6 is fixedly connected to the air distribution pipe 2. By setting the rotating motor 6, the rotation of the rotating motor 6 can drive the baffle 4 fixedly connected to it to rotate, changing the position of the through hole 11 and the through hole 22, which facilitates the use of the igniter.

[0025] An air inlet pipe 10 is fixed on the igniter rod 1. The other end of the air inlet pipe 10 extends into the inner cavity of the air distribution pipe 2. Air can enter the inner cavity of the ignition chamber 5 through the air inlet pipe 10 and the air distribution pipe 2. A gas inlet hole 7 is provided on the side of the ignition chamber 5 near the air distribution pipe 2. With the setting of the gas inlet hole 7, when the air flows rapidly in the ignition chamber 5, the pressure in the ignition chamber 5 is less than the external pressure. The gas around the ignition tube 3 can enter the ignition chamber 5 through the gas inlet hole 7. The gas and air can be fully mixed, which makes it easier for the igniter to ignite the residual gas in the blast furnace.

[0026] A cooling plate 9 is fixedly connected to the outside of the ignition tube 3. The cooling plate 9 is located on the side of the gas inlet 7 near the air distribution pipe 2. The side of the cooling plate 9 away from the gas inlet 7 has evenly distributed nozzles. A cooling tube 8 is fixed to the igniter rod 1, with the other end extending into the inner cavity of the cooling plate 9. Cooling air can enter the inner cavity of the cooling plate 9 through the cooling tube 8 and be evenly sprayed onto the igniter rod 1 and the air distribution pipe 2 through the nozzles, thus cooling the igniter rod 1 and the air distribution pipe 2 and extending the service life of the igniter. The outer diameter of the cooling plate 9 is larger than the outer diameter of the igniter rod 1, allowing the sprayed cooling gas to reach the igniter rod 1. The size of the cooling plate 9 can be set according to requirements and is not limited here. Furthermore, the gas sprayed from the cooling plate 9 can reduce the gas concentration around the igniter rod 1 and the air distribution pipe 2, preventing gas combustion at the igniter rod 1 and the air distribution pipe 2, further protecting the igniter. The temperature of the cooling gas can be selected according to requirements, and there are no restrictions here.

[0027] A combustible gas detector 13 is fixedly connected inside the inner cavity of the igniter rod 1. A detection chamber is provided on the ignition tube 3. The detection probe of the combustible gas detector 13 is located on the side of the detection chamber near the baffle 4. With the setting of the combustible gas detector 13, the igniter has the function of detecting the concentration of coal gas, which makes it easier for the staff to control the insertion amount of the igniter and improve the ignition efficiency.

[0028] The outer surface of the igniter rod 1, the surface of the ignition tube 3, the inner wall of the ignition chamber 5, the inner wall of the detection chamber, the outer surface of the air distribution pipe 2, the outer surface of the cooling pipe 8, and the outer surface of the air inlet pipe 10 are all coated with a heat-insulating coating. The heat-insulating coating can protect the igniter, reduce the impact of heat in the blast furnace on the igniter, and extend the service life of the igniter.

[0029] In some embodiments of this application, the igniter is a piezoelectric igniter, and the discharge electrode of the igniter is located inside the ignition chamber 5. Its working principle is prior art and will not be described in detail here.

[0030] In summary: When this safety-protected blast furnace top igniter is used, it is inserted into the blast furnace from the top. During its movement within the blast furnace, the combustible gas detector 13 continuously monitors the gas concentration around the ignition tube 3. When the gas concentration around the ignition tube 3 is ignitable, the combustible gas detector 13 alarms, alerting the operator to stop moving the igniter. The rotating motor 6 then operates, driving a fixedly connected shaft to rotate. This shaft rotates the baffle 4 until the through hole 11 overlaps with the ignition chamber 5, at which point the detection chamber is blocked by the baffle 4, protecting the probe of the combustible gas detector 13. Air is then introduced into the air inlet pipe 10, which enters the ignition chamber 5 through the air distribution pipe 2. The blast furnace gas enters the ignition chamber 5 through the gas inlet hole 7. The air and gas mix evenly within the ignition chamber 5, making them ignitable and thus achieving the ignition operation of the igniter. Furthermore, during the use of the igniter, cooling air enters the inner cavity of the cooling plate 9 through the cooling pipe 8 and is evenly sprayed onto the igniter rod 1 and the air distribution pipe 2 through the nozzle, thereby cooling the igniter rod 1 and the air distribution pipe 2 and extending the service life of the igniter. In addition, the gas sprayed from the cooling plate 9 can reduce the gas concentration around the igniter rod 1 and the air distribution pipe 2, preventing the gas from burning at the igniter rod 1 and the air distribution pipe 2, and further protecting the igniter.

[0031] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art. Although the embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A safety-protected furnace top igniter, comprising an igniter rod (1), characterized in that: One end of the igniter rod is fixedly connected to a uniform air pipe (2), and the other end of the uniform air pipe (2) is fixedly connected to an ignition pipe (3). The other end of the ignition pipe (3) is movably connected to a baffle (4). Ignition chambers (5) are evenly arranged on the ignition pipe (3). A through hole (11) adapted to the ignition chamber (5) is provided on the baffle (4). The inner cavity of the ignition chamber (5) is connected to the inner cavity of the uniform air pipe (2). A gas inlet hole (7) is provided on the side of the ignition chamber (5) close to the uniform air pipe (2). A cooling plate (9) is fixedly connected to the outside of the ignition pipe (3). The cooling plate (9) is located on the side of the gas inlet hole (7) close to the uniform air pipe (2). Spray holes are evenly arranged on the side of the cooling plate (9) away from the gas inlet hole (7). A combustible gas detector (13) is fixedly connected inside the inner cavity of the igniter rod (1). A detection cavity is provided on the ignition tube (3). The detection probe of the combustible gas detector (13) is located on the side of the detection cavity close to the baffle (4). The baffle (4) is provided with a through hole (12) that is compatible with the detection cavity. An air inlet pipe (10) and a cooling pipe (8) are fixed on the igniter rod (1). The other end of the air inlet pipe (10) extends into the inner cavity of the air distribution pipe (2), and the other end of the cooling pipe (8) extends into the inner cavity of the cooling plate (9).

2. The safety protection type furnace top firearm according to claim 1, characterized in that: The air distribution pipe (2) is provided with a uniform connection hole (14) at one end near the ignition pipe (3), and the ignition chamber (5) is connected to the inner cavity of the air distribution pipe (2) through the connection hole (14).

3. The safety-protected furnace top firearm according to claim 1, characterized in that: The ignition tube (3) is movably connected to a rotating shaft in the middle. One end of the rotating shaft is fixedly connected to a baffle (4), and the other end of the rotating shaft is fixedly connected to the end of the output shaft of a rotating motor (6). The other end of the rotating motor (6) is fixedly connected to a uniform air duct (2).

4. A safety-protected furnace top firearm according to claim 3, characterized in that: When the first through hole (11) overlaps with the ignition chamber (5), the detection chamber and the second through hole (12) are in a staggered state; when the detection chamber and the second through hole (12) overlap, the first through hole (11) and the ignition chamber (5) are in a staggered state.

5. A safety-protected furnace top firearm according to claim 1, characterized in that: The outer surface of the igniter rod (1), the surface of the ignition tube (3), the inner wall of the ignition chamber (5), the inner wall of the detection chamber, the outer surface of the air distribution tube (2), the outer surface of the cooling tube (8), and the outer surface of the air inlet tube (10) are all coated with a heat insulation coating.

6. A safety-protected furnace top firearm according to claim 1, characterized in that: The outer diameter of the cooling plate (9) is larger than the outer diameter of the igniter rod (1).

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