阅读说明：本技术 全预混燃气锅炉点火装置 (Ignition device of full-premixing gas boiler ) 是由 任凯 周宇 任威力 王峰 于 2021-08-06 设计创作，主要内容包括：本发明公开全预混燃气锅炉点火装置,包括第一点火装置与第二点火装置以及金属纤维燃烧器,所述金属纤维燃烧器的一端设有进气管口,所述金属纤维燃烧器的另一端设有出烟管口,所述第一点火装置包括设置在进气管口一侧的第一点火针与第一点火感应针,所述金属纤维燃烧器内部中空形成预燃室与燃烧室,通过在出烟管口一侧设置第二点火装置,点火时两端的点火装置同时点火,火焰的传递时间更短,点火成功率更高,并且可以通过感应点火针把火焰燃烧状况完整的反馈到锅炉的控制系统,而在燃烧室中设置缓流阻件,使得进气管口输入的燃气气流直接作用于阻流网,通过阻流网缓冲燃气气流的冲击力,避免气流过大而影响第一点火装置的点燃成功率。(The invention discloses a fully premixed gas boiler ignition device, which comprises a first ignition device, a second ignition device and a metal fiber burner, wherein one end of the metal fiber burner is provided with an air inlet pipe orifice, the other end of the metal fiber burner is provided with a smoke outlet pipe orifice, the first ignition device comprises a first ignition needle and a first ignition induction needle which are arranged on one side of the air inlet pipe orifice, the metal fiber burner is hollow to form a pre-combustion chamber and a combustion chamber, the second ignition device is arranged on one side of the smoke outlet pipe orifice, the ignition devices on two ends are simultaneously ignited during ignition, the transmission time of flame is shorter, the ignition success rate is higher, the combustion condition of the flame can be completely fed back to a control system of the boiler by the induction ignition needle, and a slow flow resistance piece is arranged in the combustion chamber, so that gas flow input from the air inlet pipe orifice directly acts on a flow resistance net, the impact force of the gas flow is buffered by the flow resistance net, the ignition success rate of the first ignition device is prevented from being influenced by overlarge airflow.)

1. The utility model provides a full premix gas boiler ignition, includes first ignition and second ignition (2) and metal fiber combustor (1), the one end of metal fiber combustor (1) is equipped with inlet pipe mouth (10), the other end of metal fiber combustor (1) is equipped with out tobacco pipe mouth (3), first ignition is including setting up first ignition needle (11) and first ignition induction needle (9) in inlet pipe mouth (10) one side, its characterized in that: the metal fiber combustor (1) is internally hollow to form a pre-combustion chamber (7) and a combustion chamber (4), an outer sleeve (8) wrapped outside the metal fiber combustor (1) is arranged on the outer side of the pre-combustion chamber (7), a heat conduction pipe (12) is connected to the top of the combustion chamber (4), the other end of the heat conduction pipe (12) is communicated with the outer sleeve (8), one end of the outer sleeve (8) is connected with an induced draft fan (5), part of high-heat flue gas generated in the combustion chamber (4) is introduced into the outer sleeve (8) through the induced draft fan (5), and then the temperature of an air inlet of the metal fiber combustor (1) is increased, so that fuel gas is fully combusted in the pre-combustion chamber (7);

the second ignition device (2) is arranged on one side of the smoke outlet pipe mouth (3), a slow flow resistance piece (13) used for reducing impact force of gas airflow is arranged in the combustion chamber (4), a transmission assembly (14) is arranged between the slow flow resistance piece (13) and the second ignition device (2), and after the gas airflow entering the air inlet pipe mouth (10) is contacted with the slow flow resistance piece (13), airflow impact is relieved, the second ignition device (2) is prevented from being extinguished due to overlarge airflow, and the slow flow resistance piece (13) can be extruded at the same time, so that the second ignition device (2) is driven to rotate according to the size of airflow impact force through the transmission assembly (14), and the second ignition device (2) is enabled to be aligned to the sinking direction of the gas airflow to enable the gas airflow to be fully combusted.

2. The fully premixed gas boiler ignition device of claim 1, wherein: the slow flow hinders piece (13) including fixed frame (131), fixedly connected with hinders flow net (132) on the inner frame wall of fixed frame (131), fixedly connected with spacing slider (133) on the both sides outer wall of fixed frame (131), fixedly connected with and choked flow net (132) direction vertically dead lever (134) on the outer wall of spacing slider (133), the diapire intermediate position fixedly connected with rack (135) of fixed frame (131).

3. The fully premixed gas boiler ignition device of claim 2, wherein: the combustor is characterized in that guide sliding grooves (15) are formed in the inner walls of the two sides of the combustion chamber (4), springs (16) are sleeved outside the fixing rods (134), one ends of the springs (16) are fixedly connected with the inner walls of the guide sliding grooves (15), and the other ends of the springs (16) are fixedly connected with limiting sliding blocks (133).

4. The fully premixed gas boiler ignition device of claim 2, wherein: the transmission assembly (14) comprises a first shaft rod (146) and a second shaft rod (143), two ends of the first shaft rod (146) are rotatably connected with the inner wall of the combustion chamber (4), a driving gear (145) meshed with the rack (135) is fixedly connected to the middle of the first shaft rod (146), two ends of the second shaft rod (143) are rotatably connected with the inner wall of the combustion chamber (4), a driven wheel (142) is fixedly connected to the middle of the second shaft rod (143), the driven wheel (142) is in transmission connection with the driving gear (145) through a chain (141), and a support (144) is fixedly connected to the driven wheel (142).

5. The fully premixed gas boiler ignition device of claim 4, wherein: the second ignition device (2) comprises a second ignition needle (201), a fixed frame plate (202) and a second ignition induction needle (203), the fixed frame plate (202) is of an L-shaped structure and is divided into a horizontal section and a vertical section, and the horizontal section of the fixed frame plate (202) is fixedly connected with the support (144).

6. The fully premixed gas boiler ignition device of claim 5, wherein: the second ignition needle (201) and the second ignition induction needle (203) are vertically fixed on the vertical section of the fixed frame plate (202).

7. The fully premixed gas boiler ignition device of claim 1, wherein: the inner wall of the outer sleeve (8) is provided with a spiral air duct (6) which is spirally wound on the metal fiber combustor (1).

Technical Field

The invention belongs to the related technical field of gas boilers, and particularly relates to a fully premixed gas boiler ignition device.

Background

The full-premixed gas boiler using natural gas or liquefied petroleum gas is characterized by that the natural gas or gasified petroleum gas premixed with air is fed into the surface of cylindrical metal fibre combustor by means of D.C. frequency-conversion fan, and is ignited by means of ignition electrode, and the ignition operation is completed by means of the process of feedback signal of flame induction needle. When the boiler is ignited, the hearth is in a normal-temperature cold state, the instantaneous temperature after the combustor is ignited quickly rises to a higher temperature, the cold and hot air in the boiler is strongly alternated to excite the kinetic energy for generating vibration, meanwhile, a large amount of air is consumed in combustion at the moment after the combustor is ignited to form negative pressure in the boiler, and the pressure difference between the inside and the outside causes the boiler to generate vibration and noise.

For this purpose, application No. CN202020505426.3 discloses a gas boiler furnace, which includes a furnace body and a preheating assembly. The utility model discloses an install one set of piece of closing of preheating that can provide hot-blast in the combustion chamber of traditional gas boiler furnace body, the hot-blast dish that will preheat the piece designs into the spherical concave surface and on the concave spherical surface densely to lay the globular tuyere head that has intensive wind hole of a plurality of convex surface. Before the boiler burner is ignited, the hot air source can provide high-temperature hot air for the hot air disc, and turbulent scattered hot air is provided for the combustion chamber of the hearth body through the dense air holes of the air nozzle head, so that the temperature and the air density in the combustion chamber are quickly increased. The utility model discloses improve gas furnace, can preheat and supply the air furnace before the ignition, reduce the temperature difference and the pressure differential in the twinkling of an eye of igniteing to vibration and noise in the effective control gas boiler ignition process.

The technical scheme proposed by the above documents has the following problems although having certain benefits: dense wind hole through the tuyere head provides the disorderly scattering hot-blast to the combustion chamber of furnace body with high-temperature hot-blast, and the air current direct action is in the ignition needle, the combustible gas on metal fiber combustor surface is at the in-process of lighting a fire and is swept by the fan easily under this condition, and then make the flame of lighting blow out and can't form abundant burning state, make out tuber pipe and exhaust pipe end degree of combustion differ, in addition because the action of gravity, when gas air current impact dynamics is big, the gas is easily gathered on the combustion chamber upper strata, when gas air current impact dynamics is little, the gas is easily gathered on the combustion chamber bottom, make the success rate of lighting lower.

Disclosure of Invention

The invention aims to provide a fully premixed gas boiler ignition device to solve the problems of inconsistent combustion degree and low ignition success rate in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the ignition device of the fully premixed gas boiler comprises a first ignition device, a second ignition device and a metal fiber burner, one end of the metal fiber combustor is provided with an air inlet pipe orifice, the other end of the metal fiber combustor is provided with a smoke outlet pipe orifice, the first ignition device comprises a first ignition needle and a first ignition induction needle which are arranged on one side of the air inlet pipe orifice, the metal fiber burner is hollow to form a precombustion chamber and a combustion chamber, an outer sleeve wrapped outside the metal fiber burner is arranged on the outer side of the precombustion chamber, the top of the combustion chamber is connected with a heat conducting pipe, the other end of the heat conducting pipe is communicated with the outer sleeve, one end of the outer sleeve is connected with an induced draft fan, part of high-heat flue gas generated in the combustion chamber is introduced into the outer sleeve by the induced draft fan, further increasing the temperature of the air inlet of the metal fiber burner to ensure that the fuel gas is fully combusted in the precombustion chamber;

the second ignition device is arranged on one side of the smoke outlet pipe port, a slow flow resistance piece used for reducing impact force of gas airflow is arranged in the combustion chamber, a transmission assembly is arranged between the slow flow resistance piece and the second ignition device, and after the gas airflow entering the air inlet pipe port is contacted with the slow flow resistance piece, airflow impact is relieved, the second ignition device is prevented from being extinguished due to overlarge airflow, meanwhile, the slow flow resistance piece can be extruded, so that the second ignition device is driven to rotate according to the impact force of the airflow through the transmission assembly, and the second ignition device is enabled to be aligned with the sinking direction of the gas airflow to enable the gas airflow to be fully combusted.

Preferably, the slow flow resistance piece comprises a fixed frame, a flow blocking net is fixedly connected to the inner frame wall of the fixed frame, limit sliders are fixedly connected to the outer walls of the two sides of the fixed frame, fixing rods perpendicular to the direction of the flow blocking net are fixedly connected to the outer walls of the limit sliders, and racks are fixedly connected to the middle position of the bottom wall of the fixed frame.

Preferably, the inner walls of the two sides of the combustion chamber are provided with guide sliding grooves, the outer portion of the fixing rod is sleeved with a spring, one end of the spring is fixedly connected with the inner wall of the guide sliding groove, and the other end of the spring is fixedly connected with the limiting sliding block.

Preferably, the transmission assembly comprises a first shaft rod and a second shaft rod, two ends of the first shaft rod are rotatably connected with the inner wall of the combustion chamber, a driving gear meshed with the rack is fixedly connected to the middle position of the first shaft rod, two ends of the second shaft rod are rotatably connected with the inner wall of the combustion chamber, a driven wheel is fixedly connected to the middle position of the second shaft rod, the driven wheel is connected with the driving gear through a chain in a transmission manner, and a support is fixedly connected to the driven wheel.

Preferably, the second ignition device comprises a second ignition needle, a fixed frame plate and a second ignition induction needle, the fixed frame plate is of an L-shaped structure and is divided into a horizontal section and a vertical section, and the horizontal section of the fixed frame plate is fixedly connected with the support.

Preferably, the second ignition needle and the second ignition induction needle are vertically fixed on the vertical section of the fixed frame plate.

Preferably, the inner wall of the outer sleeve is provided with a spiral air duct spirally surrounding the metal fiber burner.

Compared with the prior gas boiler ignition technology, the invention provides a fully premixed gas boiler ignition device, which has the following beneficial effects:

1. according to the invention, the second ignition device is arranged on one side of the smoke outlet pipe port, the ignition devices at two ends are simultaneously ignited during ignition, the flame transfer time is shorter, the ignition success rate is higher, the flame combustion condition of the metal fiber combustor can be completely fed back to a control system of a boiler through the induction ignition needle, and the slow flow resistance piece is arranged in the combustion chamber, so that the gas flow input from the air inlet pipe port directly acts on the flow resistance net, the impact force of the gas flow is buffered through the flow resistance net, and the influence of overlarge gas flow on the ignition success rate of the first ignition device is avoided;

2. when the slow flow resistance piece is impacted by larger gas flow, the transmission assembly drives the second ignition needle and the second ignition induction needle on the second ignition device to rotate according to the impact force of the gas flow, so that the second ignition device is aligned with the sinking direction of the gas flow to enable the gas flow to be fully combusted, and when the gas flow changes, the gas can be fully combusted in the metal fiber combustor, so that the gas utilization rate is improved, the energy is saved, and the combustion efficiency is improved;

3. the top of the combustion chamber is connected with a heat conduction pipe, the other end of the heat conduction pipe is communicated with an outer sleeve, one end of the outer sleeve is connected with an induced draft fan, the inner wall of the outer sleeve is provided with a spiral air duct spirally surrounding a metal fiber combustor, part of high-temperature smoke generated in the combustion chamber is introduced into the outer sleeve through the induced draft fan, the circulation path of the smoke is prolonged through the spiral air duct between the outer sleeve and the metal fiber combustor, the high-temperature smoke is fully contacted with the outer surface of a precombustion chamber, the temperature of an air inlet of the metal fiber combustor is increased, and the gas is fully combusted in the precombustion chamber.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention without limiting the invention in which:

FIG. 1 is a schematic structural diagram of an ignition device of a fully premixed gas boiler in an initial state when the gas flow is small according to the present invention;

FIG. 2 is a structural diagram of an ignition device of a fully premixed gas boiler according to the present invention in a second state when the gas flow is large;

FIG. 3 is a schematic structural view of a slow flow resistor according to the present invention;

FIG. 4 is an enlarged view of a portion A of FIG. 1 according to the present invention;

FIG. 5 is an enlarged view of a portion of the structure shown at B in FIG. 1 according to the present invention;

FIG. 6 is an enlarged view of a portion of the structure shown at C in FIG. 1 according to the present invention;

in the figure: 1. a metal fiber burner; 2. a second ignition device; 3. a smoke outlet pipe; 4. a combustion chamber; 5. an induced draft fan; 6. a spiral duct; 7. a precombustion chamber; 8. an outer sleeve; 9. a first ignition sensing pin; 10. an air inlet pipe orifice; 11. a first ignition needle; 12. a heat conducting pipe; 13. a slow flow resistance member; 14. a transmission assembly; 15. a guide chute; 16. a spring; 131. a fixing frame; 132. a current blocking net; 133. a limiting slide block; 134. fixing the rod; 135. a rack; 141. a chain; 142. a driven wheel; 143. a second shaft lever; 144. a support; 145. a driving gear; 146. a first shaft lever; 201. a second ignition needle; 202. fixing the frame plate; 203. and a second ignition induction needle.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, the present invention provides a technical solution: the ignition device of the fully premixed gas boiler comprises a first ignition device, a second ignition device 2 and a metal fiber combustor 1, wherein one end of the metal fiber combustor 1 is provided with an air inlet pipe orifice 10, the other end of the metal fiber combustor 1 is provided with a smoke outlet pipe orifice 3, the first ignition device comprises a first ignition needle 11 and a first ignition induction needle 9 which are arranged on one side of the air inlet pipe orifice 10, the gas introduced from the gas inlet pipe orifice 10 is ignited by the first ignition needle 11, the gas combustion condition when and after the ignition of the first ignition needle 11 is induced by the first ignition induction needle 9, the metal fiber combustor 1 is hollow inside to form a pre-combustion chamber 7 and a combustion chamber 4, the first ignition device and the second ignition device 2 are respectively arranged at the air inlet pipe orifice 10 and the smoke outlet pipe orifice 3 of the pre-combustion chamber 7 and the combustion chamber 4, so that simultaneous ignition at two ends is realized, the transmission time of flame is shorter, and the ignition success rate is further improved.

It should be noted that an outer sleeve 8 wrapped outside the metal fiber burner 1 is arranged outside the precombustion chamber 7, a heat conduction pipe 12 is connected to the top of the combustion chamber 4, the other end of the heat conduction pipe 12 is communicated with the outer sleeve 8, one end of the outer sleeve 8 is connected with an induced draft fan 5, a spiral air duct 6 spirally surrounding the metal fiber burner 1 is arranged on the inner wall of the outer sleeve 8, part of high-temperature flue gas generated in the combustion chamber 4 is introduced into the outer sleeve 8 through the induced draft fan 5, the circulation path of the flue gas is prolonged through the spiral air duct 6 between the outer sleeve 8 and the metal fiber burner 1, so that the high-temperature flue gas is fully contacted with the outer surface of the precombustion chamber 7, the temperature of an air inlet of the metal fiber burner 1 is increased, and the fuel gas is fully combusted in the precombustion chamber 7.

It should be understood that the second ignition device 2 is disposed on one side of the smoke outlet pipe mouth 3, a slow flow resistance member 13 for reducing the impact force of the gas flow is disposed in the combustion chamber 4, the slow flow resistance member 13 includes a fixed frame 131, a flow resistance net 132 is fixedly connected to the inner frame wall of the fixed frame 131, a limit slider 133 is fixedly connected to the outer walls of the two sides of the fixed frame 131, a fixed rod 134 perpendicular to the flow resistance net 132 is fixedly connected to the outer wall of the limit slider 133, a rack 135 is fixedly connected to the middle position of the bottom wall of the fixed frame 131, guide chutes 15 are disposed on the inner walls of the two sides of the combustion chamber 4, a spring 16 is sleeved outside the fixed rod 134, one end of the spring 16 is fixedly connected to the inner wall of the guide chute 15, the other end of the spring 16 is fixedly connected to the limit slider 133, the gas flow input from the air inlet pipe mouth 10 directly acts on the flow resistance net 132, the impact force of the gas flow is buffered by the flow resistance net 132, the ignition success rate of the first ignition device is prevented from being influenced by overlarge airflow.

It should be noted that a transmission assembly 14 is disposed between the slow flow resistor 13 and the second ignition device 2, the transmission assembly 14 includes a first shaft rod 146 and a second shaft rod 143, two ends of the first shaft rod 146 are rotatably connected with an inner wall of the combustion chamber 4, a driving gear 145 engaged with the rack 135 is fixedly connected to a middle position of the first shaft rod 146, two ends of the second shaft rod 143 are rotatably connected with an inner wall of the combustion chamber 4, a driven wheel 142 is fixedly connected to a middle position of the second shaft rod 143, the driven wheel 142 is rotatably connected with the driving gear 145 through a chain 141, a support 144 is fixedly connected to the driven wheel 142, when the flow blocking net 132 is impacted by the gas flow input from the gas inlet pipe orifice 10, the fixed frame 131 can be driven to slide towards one side of the smoke outlet pipe orifice 3, and further, the driving gear 145 is rotated through the engagement between the rack 135 and the driving gear 145, the driven wheel 142 is driven to rotate through the transmission between the driving gear 145 and the chain 141, thereby changing the angle of the seat 144.

It is worth noting that the second ignition device 2 comprises a second ignition needle 201, a fixing frame plate 202 and a second ignition induction needle 203, the fixing frame plate 202 is of an L-shaped structure and is divided into a horizontal section and a vertical section, the horizontal section of the fixing frame plate 202 is fixedly connected with the support 144, the second ignition needle 201 and the second ignition induction needle 203 are vertically fixed on the vertical section of the fixing frame plate 202, gas airflow entering from the air inlet pipe orifice 10 is in contact with the slow flow resistance piece 13 to relieve airflow impact, the second ignition device 2 is prevented from being extinguished due to overlarge airflow, and the slow flow resistance piece 13 can be extruded at the same time, so that the transmission assembly 14 drives the second ignition needle 201 on the second ignition device 2 and the second ignition induction needle 203 to rotate according to the size of the airflow impact force, and the second ignition device 2 is enabled to be fully combusted by aligning the sinking direction of the gas airflow.

The working principle and the using process of the invention are as follows: when the ignition device is used, mixed gas of air and gas with a certain combustion proportion is introduced from the air inlet pipe orifice 10, the mixed gas is ignited through the first ignition needle 11 of the first ignition device, the gas combustion condition during ignition and after ignition of the first ignition needle 11 is induced through the first ignition induction needle 9, the gas flow input from the air inlet pipe orifice 10 directly impacts the flow blocking net 132 under the action of the gas flow, the impact force of the gas flow is buffered through the flow blocking net 132, the influence of overlarge gas flow on the ignition success rate of the first ignition device is avoided, when the flow blocking net 132 is acted by larger gas flow (the gas is influenced by gravity to be smaller, so that the gas is mainly concentrated in the upper region), the fixing frame 131 can be driven to slide towards one side of the smoke outlet pipe orifice 3, the driving gear 145 rotates anticlockwise under the meshing action of the rack 135 and the driving gear 145, the driven wheel 142 is driven to synchronously rotate under the transmission action of the driving gear 145 and the chain 141, further, the second ignition needle 201 and the second ignition induction needle 203 on the second ignition device 2 are driven to rotate anticlockwise (the second state in fig. 2), and the gas in the upper layer area is aligned to be ignited, so that the gas is fully combusted, when the airflow is reduced, the fixing frame 131 can move to the original position (the first state in fig. 1) due to the elastic force of the spring 16, and further the second ignition device 2 can be enabled to recover the original position to ignite the gas at the bottom layer, so that the gas is fully combusted;

in the combustion process, partial high-heat flue gas generated in the combustion chamber 4 is introduced into the outer sleeve 8 through the induced draft fan 5, and the circulation path of the flue gas is prolonged through the spiral air duct 6 between the outer sleeve 8 and the metal fiber combustor 1, so that the high-temperature flue gas is fully contacted with the outer surface of the precombustion chamber 7, the temperature of an air inlet of the metal fiber combustor 1 is increased, and the fuel gas is easily ignited by the first ignition needle 11 in the precombustion chamber 7 and is fully combusted.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.