Pneumatic propulsion mechanism of combustor

Abstract

The utility model relates to the technical field of combustors, and discloses a combustor pneumatic propelling mechanism which comprises a positioning plate and an advancing and retreating device used for driving the positioning plate to move in the direction close to or away from a hearth, a burning torch is arranged on the positioning plate, and the advancing and retreating device comprises an air cylinder. According to the ignition gun, the situation that a gun barrel of the ignition gun is placed in a high-temperature hearth for a long time can be avoided, and the service life of the ignition gun is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of burners, and in particular, to a pneumatic propulsion mechanism for a burner. Background Art

[0002] A burner is a device that mixes fuel with air and ignites it to generate heat energy. It uses the high-temperature flame and flue gas generated when the fuel burns in the furnace as a heat source to heat the medium flowing at high speed in the furnace tubes to reach the specified temperature.

[0003] Among them, the barrel part of the igniter extends into the furnace to facilitate ignition. However, the barrel of the igniter is in the high-temperature furnace for a long time, which is prone to coking and corrosion, reducing the service life of the igniter. Utility Model Content

[0004] In order to prevent the barrel of the igniter from being placed in the high-temperature furnace for a long time and improve the service life of the igniter, the present application provides a pneumatic propulsion mechanism for a burner.

[0005] The present application provides a pneumatic propulsion mechanism for a burner, adopting the following technical solutions:

[0006] A pneumatic propulsion mechanism for a burner includes a positioning plate, a retracting and extending device for driving the positioning plate to move towards or away from the furnace, an igniter is arranged on the positioning plate, the retracting and extending device includes a cylinder, and a solenoid valve for controlling the movement of the telescopic shaft of the cylinder, and a fixing member connecting the positioning plate is arranged at the end of the telescopic shaft of the cylinder.

[0007] By adopting the above technical solutions, the solenoid valve drives the telescopic shaft of the cylinder to extend and retract, thereby driving the positioning plate to move, and then driving the igniter arranged on the positioning plate to move. That is, when ignition is required, the end of the barrel of the igniter can be driven to move into the furnace for ignition. When the ignition is completed, the barrel of the igniter is driven to move out of the furnace, reducing the time of the igniter in the furnace, thereby increasing the service life of the igniter.

[0008] Optionally, the fixing member includes a threaded rod arranged at the end of the telescopic shaft of the cylinder, a positioning ring sleeved on the outer side wall of the end of the telescopic shaft of the cylinder, and a locking nut threadedly connected to the threaded rod. The threaded rod can pass through the positioning plate, and the positioning plate is tightened against the positioning plate by the locking nut.

[0009] By adopting the above technical solutions, the threaded rod is passed through the positioning plate, so that one side of the positioning plate abuts against the surface of the positioning ring, and then the nut is threadedly connected, and the positioning plate can be locked to the end face of the telescopic shaft of the cylinder.

[0010] Optionally, the pneumatic propulsion mechanism further includes a travel switch and a striking rod disposed on the positioning plate. There are two travel switches. A positioning rod is disposed on the striking rod and extends between the two travel switches. When the positioning plate moves towards or away from the furnace, the positioning rod can drive the positioning rod to respectively collide with the contacts on the two travel switches.

[0011] By adopting the above technical solution, when the positioning rod strikes the contact of the travel switch, the travel switch can be triggered. When the positioning plate moves, driving the striking rod and the positioning rod to move, and enabling the positioning rod to respectively strike the two travel switches, the signal can be fed back through the travel switch, that is, it can be known whether the igniter has advanced into the furnace or has withdrawn from the furnace at this time.

[0012] Optionally, the pneumatic propulsion mechanism further includes a support plate. The cylinder is disposed on the support plate, and the telescopic shaft of the cylinder slides through the support plate. The striking rod and the barrel of the igniter both slide through the support plate.

[0013] By adopting the above technical solution, setting the support plate can facilitate the installation of the cylinder. At the same time, the telescopic shaft of the cylinder, the striking rod, and the barrel of the igniter all slide through the support plate, which can improve their stability.

[0014] Optionally, a mounting plate is disposed on the support plate, and both travel switches are disposed on the mounting plate.

[0015] Optionally, the pneumatic propulsion mechanism further includes a cooling device for cooling the igniter.

[0016] By adopting the above technical solution, the igniter can be cooled, the temperature of the barrel of the igniter can be reduced, the damage caused by high temperature to the barrel of the igniter can be reduced, and the service life of the barrel of the igniter can be further improved.

[0017] Optionally, the cooling device includes a ventilation duct covering the outside of the barrel of the igniter, an air inlet pipe disposed on the ventilation duct, an air outlet pipe disposed on the ventilation duct, and a fan connected to the air inlet pipe. The air inlet pipe and the air outlet pipe are both communicated with the ventilation duct, and the air inlet pipe and the air outlet pipe are respectively disposed at both ends of the ventilation duct.

[0018] By adopting the above technical solution, the outside cold air is introduced into the air inlet pipe through the fan and discharged from the air outlet pipe after passing through the ventilation duct. When the outside cold air passes through the ventilation duct, the temperature on the barrel of the igniter passing through the ventilation duct can be taken away, thereby cooling the barrel of the igniter.

[0019] Optionally, the air inlet pipe is arranged at one end of the ventilation duct close to the positioning plate, and the air outlet pipe is arranged at the end of the ventilation duct far from the positioning plate.

[0020] By adopting the above technical solution, during the use of the ignition gun, since the end far from the positioning plate is the ignition end, the temperature is relatively higher than that at the end close to the positioning plate. The arrangement of the air inlet pipe and the air outlet pipe enables the air to first cool the barrel from the end close to the positioning plate, and then blow towards the end far from the positioning plate to cool the barrel with a higher temperature. This can not only effectively cool the entire barrel of the gun, but also prevent the reverse heating of the relatively cooler part of the barrel caused by the heated cold air after heat exchange with the barrel.

[0021] Optionally, the ventilation duct includes a first pipe and a second pipe. The first pipe is located at a section close to the positioning plate, and the second pipe is located at an end close to the end face of the barrel of the ignition gun. The inner diameter of the first pipe is smaller than that of the second pipe.

[0022] By adopting the above technical solution, the inner diameter of the first pipe is smaller, and the temperature of the corresponding barrel of the ignition gun in the first pipe is generally lower. Therefore, the cold air entering the first pipe can quickly enter the second pipe to cool the relatively hotter part of the barrel of the ignition gun in the second pipe. At the same time, since the diameters of the first pipe and the second pipe are different, the amount of air that can be retained at the same time is also different. This design enables more air to be retained in the second pipe, so as to better cool the barrel of the ignition gun at the end far from the positioning plate.

[0023] In summary, the present application has at least the following beneficial effects:

[0024] 1. By controlling the cylinder through the solenoid valve and then controlling the movement of the positioning plate and the ignition gun, the barrel of the ignition gun can be driven to withdraw from the furnace in time after the ignition gun ignites, thereby increasing the service life of the ignition gun.

[0025] 2. By cooling the barrel of the ignition gun through the cooling device, the temperature of the barrel of the ignition gun can be further reduced, and the service life of the ignition gun can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of an embodiment of the present application;

[0027] Figure 2 is Figure 1 an enlarged structural diagram of part A in

[0028] Figure 3 is an enlarged structural diagram of part B in Fig. 1.

[0029] Description of reference numerals: 1. Ignition gun; 2. Positioning plate; 3. Advancing and retracting device; 31. Cylinder; 32. Solenoid valve; 4. Fixing member; 41. Threaded rod; 42. Positioning ring; 43. Locking nut; 5. Travel switch; 6. Bumping rod; 61. Positioning rod; 7. Support plate; 71. Mounting plate; 8. Cooling device; 81. Ventilation duct; 811. First pipe; 812. Second pipe; 82. Air inlet duct; 83. Air outlet duct; 84. Fan. Detailed implementation mode

[0030] The following further describes the present application in conjunction with the attached Figures 1 - 3 drawings.

[0031] The embodiment of the present application discloses a pneumatic propulsion mechanism for a burner. Refer to Figure 1 . The pneumatic propulsion mechanism includes a positioning plate 2 and an advancing and retracting device 3. The ignition gun 1 mainly includes two parts: a gun head and a gun barrel. The gun head part of the ignition gun 1 is fixed on one side wall of the positioning plate 2. Preferably, the axis direction of the gun barrel of the ignition gun 1 is perpendicular to the surface of the positioning plate 2; the advancing and retracting device 3 can drive the positioning plate 2 to move towards or away from the burner furnace, so as to drive the end of the gun barrel of the ignition gun 1 to penetrate into the furnace for ignition, and after ignition, it can drive the gun barrel of the ignition gun 1 to withdraw from the furnace, so as to reduce the residence time of the gun barrel of the ignition gun 1 in the furnace and improve the service life of the ignition gun 1.

[0032] Refer to Figure 1 . In this embodiment, the pneumatic propulsion mechanism further includes a support plate 7. The support plate 7 is parallel to the positioning plate 2, and the support plate 7 can be fixed to the body of the burner (not shown in the figure) by welding or other means; the advancing and retracting device 3 includes a cylinder 31 and a solenoid valve 32. One end of the cylinder 31 is detachably fixed to the side wall of the support plate 7 by bolts or other means. Optionally, the other end of the cylinder 31 can be suspended or fixed to the burner body by another flat plate; the telescopic shaft of the cylinder 31 slides through the support plate 7, and the axis direction of the telescopic shaft of the cylinder 31 is parallel to the axis direction of the gun barrel of the ignition gun 1. A fixing member 4 connecting the positioning plate 2 is provided at the end of the telescopic shaft of the cylinder 31.

[0033] Refer to Figure 1 . Further, air pipes are connected between both ends of the cylinder 31 and the solenoid valve 32 respectively. Compressed air enters the cylinder 31 through the air valve. Thus, by manually or electrically controlling the solenoid valve, the air flow direction can be changed, so as to control the movement of the telescopic shaft of the cylinder 31, and drive the positioning plate 2 to move through the telescopic shaft, and finally control the movement of the ignition gun 1.

[0034] Refer to Figure 1 and Figure 2, in this embodiment, the fixing member 4 includes a threaded rod 41 fixed to the end of the telescopic shaft of the cylinder 31 by integral molding or welding, a positioning ring 42 coaxially sleeved on the outer side wall of the end of the telescopic shaft of the cylinder 31, and a locking nut 43 threadedly connected to the threaded rod 41; the inner wall of the positioning ring 42 is welded to the outer wall of the telescopic shaft of the cylinder 31, and an opening for the threaded rod 41 to pass through is provided on the positioning plate 2. When the threaded rod 41 passes through the opening on the positioning plate 2, the side wall of the positioning plate 2 can abut against the side wall of the positioning ring 42. At this time, the locking nut 43 is threadedly connected to the threaded rod 41, and the positioning plate 2 can be tightly abutted against the positioning ring 42, that is, the positioning plate 2 can be fixed to the telescopic shaft of the cylinder 31.

[0035] In this embodiment, the positioning plate 2 can be suspended; in other embodiments, a guiding block can be provided on the side wall of the positioning plate 2, and a guiding groove for the guiding block to slide is provided on the corresponding burner body, so that the sliding of the positioning plate 2 is more stable.

[0036] Refer to Figure 1 and Figure 3 , in this embodiment, the pneumatic propulsion mechanism can further include a travel switch 5 and a striker 6. The forming switch has a contact for sensing. On the side wall of the support plate 7 facing away from the positioning plate 2, a mounting plate 71 can be fixed by integral molding or welding. The mounting plate 71 is a rectangular plate and is arranged along the horizontal direction. Two travel switches 5 are provided and are both fixed on the mounting plate 71. The straight line formed by connecting the centers of the two travel switches 5 is parallel to the axis direction of the telescopic shaft of the cylinder 31; one end of the striker 6 can be welded and fixed to the side wall of the positioning plate 2 facing the support plate 7, and the other end extends along the direction of the support plate 7 perpendicular to the surface of the positioning plate 2 and slides through the support plate 7. A positioning rod 61 is also welded on the striker 6. The positioning rod 61 is perpendicular to the striker 6, and the positioning plate 2 extends towards the travel switch 5 and is between the two travel switches 5;

[0037] Start the cylinder 31 to drive the barrel of the igniter 1 to move towards the burner furnace. When the end of the barrel of the igniter 1 enters the predetermined ignition position in the furnace, the positioning rod 61 can collide with the contact of the travel switch 5 close to the furnace direction, so as to feedback a signal indicating that the igniter 1 has reached the position at this time; after ignition, start the cylinder 31 again to drive the barrel of the igniter 1 to move away from the burner furnace. When the barrel of the igniter 1 completely exits the furnace, the positioning rod 61 can collide with the contact of the travel switch 5 away from the furnace direction, so as to feedback a signal indicating that the igniter 1 has retreated to the position at this time.

[0038] Refer to Figure 1 and Figure 3, Optionally, in order to further improve the protection of the igniter 1, in other embodiments, the pneumatic propulsion mechanism may further include a cooling device 8 for cooling the barrel portion of the igniter 1. The cooling device 8 includes a ventilation duct 81 coaxially sleeved outside the barrel of the ignition chamber, an air inlet duct 82 provided on the ventilation duct 81, an air outlet duct 83 provided on the ventilation duct 81, and a fan 84 connected to the air inlet duct 82; wherein, the outer diameter of the barrel of the igniter 1 is smaller than the inner diameter of the ventilation duct 81, both the air inlet duct 82 and the air outlet duct 83 are communicated with the ventilation duct 81, and are respectively provided at both ends of the ventilation duct 81. The ventilation duct 81 passes through the support plate 7 and can be fixed to the support plate 7, so that the cold air from the outside is sent into the air inlet duct 82 by the fan 84, flows along the length direction of the barrel of the igniter 1, and then is sent out from the air outlet duct 83, that is, the barrel of the igniter 1 can be cooled.

[0039] Refer to Figure 1 and Figure 3 , Preferably, the air inlet duct 82 can be fixed to one end of the ventilation duct 81 close to the positioning plate 2. The air inlet duct 82 is fixed to one end of the ventilation duct 81 close to the positioning plate 2, and the air outlet duct 83 can be fixed to one end of the ventilation duct 81 far from the positioning plate 2; during the use of the igniter 1, generally, the temperature of the barrel at the end close to the furnace is higher, and the temperature of the barrel at the end far from the furnace is lower. The above settings of the air inlet duct 82 and the ventilation duct enable the entire barrel to obtain a better cooling effect.

[0040] Furthermore, the ventilation duct 81 may further include a first pipe 811 and a second pipe 812. The inner diameter of the first pipe 811 is smaller than that of the second pipe 812. The first pipe 811 is located at one end close to the positioning plate 2, and the second pipe 812 is located at one end far from the positioning plate 2. At the same time, the air inlet duct 82 is fixed to the first pipe 811, and the air outlet duct 83 is fixed to the second pipe 812, so that the cold air entering the first pipe 811 from the air inlet duct 82 can quickly move into the second pipe 812, and the second pipe 812 can accommodate more air. The stability of the end of the barrel of the igniter 1 far from the positioning plate 2 is better, and more air can improve the cooling effect on the barrel of the igniter 1. A flange can be fixed to one end of the second pipe 812 far from the positioning plate 2. During actual use, the ventilation duct 81 can be fixed to the burner body through the flange.

[0041] The implementation principle of a pneumatic propulsion mechanism for a burner in an embodiment of this application is as follows: When it is necessary to ignite the fuel in the furnace, the cylinder 31 is started through the solenoid valve 32. The telescopic shaft of the cylinder 31 retracts into the cylinder 31, driving the positioning plate 2 and the ignition gun 1 to move. The end of the barrel of the ignition gun 1 extends into the furnace for ignition. The striker 6 moves synchronously with the positioning plate 2. When the positioning rod 61 hits the contact of the travel switch 5, it can feedback a signal indicating that the ignition gun 1 has moved in place. After ignition, the positioning plate 2 is moved again through the cylinder 31 to withdraw the barrel of the ignition gun 1 from the furnace. When the striker 6 hits the contact of another travel switch 5, the movement can be stopped. During the whole working process, the cooling device 8 continuously cools the barrel of the ignition gun 1.

[0042] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A burner pneumatic propulsion mechanism, characterized in that: It comprises a positioning plate (2), and an advance and retreat device (3) for driving the positioning plate (2) to move towards or away from a furnace, the ignition gun (1) is arranged on the positioning plate (2), the advance and retreat device (3) comprises a cylinder (31), and a solenoid valve (32) for controlling the movement of a telescopic shaft of the cylinder (31), and a fixing member (4) connected to the positioning plate (2) is arranged at the end of the telescopic shaft of the cylinder (31); The pneumatic propulsion mechanism further comprises a cooling device (8) for cooling the ignition gun (1); The cooling device (8) comprises a ventilation duct (81) which is covered on the outside of the barrel of the ignition gun (1), an air inlet pipe (82) arranged on the ventilation duct (81), an air outlet pipe (83) arranged on the ventilation duct (81), and a fan (84) connected to the air inlet pipe (82), the air inlet pipe (82) and the air outlet pipe (83) are both connected to the ventilation duct (81), and the air inlet pipe (82) and the air outlet pipe (83) are respectively arranged at two ends of the ventilation duct (81).

2. A burner pneumatic propulsion mechanism according to claim 1, characterized in that: The fixing member (4) comprises a threaded rod (41) arranged at the end of the telescopic shaft of the cylinder (31), a positioning ring (42) sleeved on the outer side wall of the end of the telescopic shaft of the cylinder (31), and a locking nut (43) threadedly connected to the threaded rod (41); the threaded rod (41) can pass through the positioning plate (2), and the positioning plate (2) is pressed against the positioning plate (2) by the locking nut (43).

3. A burner pneumatic propulsion mechanism according to claim 2, characterized in that: The pneumatic propulsion mechanism further comprises a travel switch (5) and a striker (6) arranged on the positioning plate (2), wherein two travel switches (5) are arranged, and a positioning rod (61) is arranged on the striker (6), wherein the positioning rod (6) extends between the two travel switches (5), and when the positioning plate (2) moves toward or away from the furnace, it can drive the positioning rod (61) to collide with contacts on the two travel switches (5) respectively.

4. A burner pneumatic propulsion mechanism according to claim 3, characterized in that: The pneumatic propulsion mechanism further comprises a support plate (7), the cylinder (31) being arranged on the support plate (7), and the telescopic shaft of the cylinder (31) being slidably disposed through the support plate (7), and the striker (6) and the barrel of the ignition gun (1) being slidably disposed through the support plate (7).

5. A burner pneumatic propulsion mechanism according to claim 4, characterized in that: A mounting plate (71) is provided on the support plate (7), and the two travel switches (5) are both provided on the mounting plate (71).

6. A burner pneumatic propulsion mechanism according to claim 1, characterized in that: The air inlet pipe (82) is arranged at one end of the ventilation duct (81) close to the positioning plate (2), and the air outlet pipe (83) is arranged at one end of the ventilation duct (81) away from the positioning plate (2).

7. A burner pneumatic propulsion mechanism according to claim 6, characterized in that: The ventilation duct (81) comprises a first tube (811) and a second tube (812); the first tube (811) is located at a section close to the positioning plate (2); the second tube (812) is located at an end close to the barrel end face of the ignition gun (1); and the inner diameter of the first tube (811) is smaller than the inner diameter of the second tube (812).

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