CN111578280B

CN111578280B - Upper air inlet double-ring combustor

Info

Publication number: CN111578280B
Application number: CN202010307845.0A
Authority: CN
Inventors: 邵海忠; 郑军妹; 徐强
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2020-04-17
Filing date: 2020-04-17
Publication date: 2021-05-04
Anticipated expiration: 2040-04-17
Also published as: CN111578280A

Abstract

The invention relates to an upper air inlet double-ring combustor, which comprises a bottom plate, a gas inlet pipe, a gas outlet pipe and a gas inlet pipe, wherein the bottom plate is embedded on a panel; the nozzle comprises a first nozzle and a second nozzle and is communicated with the gas pipeline; the base is supported on the bottom plate and comprises an inner ring seat body and an outer ring seat body arranged at the periphery of the inner ring seat body at intervals, the inner ring seat body is provided with an inner injection pipe, and the outer ring seat body is provided with an outer injection pipe; the fire cover comprises an inner ring fire cover and an outer ring fire cover, the inner ring fire cover is covered on the inner ring seat body in a matching way and forms an inner ring air mixing chamber with the inner ring seat body, and the outer ring fire cover is covered on the outer ring seat body in a matching way and forms an outer ring air mixing chamber with the outer ring seat body; the first nozzle is arranged on the outer side of the second nozzle, and an included angle is formed between the spraying direction of the first nozzle and the spraying direction of the second nozzle. The upper air inlet double-ring combustor can reduce the influence of flame, smoke and the like on the temperature rise of the temperature sensing probe, improve the temperature measurement precision of the temperature sensing probe and prolong the service life of the temperature sensing probe.

Description

Upper air inlet double-ring combustor

Technical Field

The invention relates to the technical field of combustors, in particular to an upper air inlet double-ring combustor.

Background

In the existing upper air inlet double-ring combustor, an inner ring nozzle is usually arranged at the central position so as to supply air to an inner ring air mixing chamber. If the utility model discloses a chinese utility model patent of even domestic gas-cooker of burning goes up air intake burner for CN210153799U (application number is 201920674552.9) is announced to the grant, the central nozzle of the combustor that wherein disclose then sets up in the central point department of burning, the position that sets up of this central nozzle is on the one hand ring load change great in the combustion process, the flame form also can change and increase, can have simultaneously to draw and penetrate the air not enough and the great problem of primary air fluctuation appears, and then lead to central fire burning unstable, and switch cabinet door can put out fire under little fire condition, the change of atmospheric pressure can influence central flame burning behind the switch cabinet door under the medium fire condition.

Disclosure of Invention

The technical problem to be solved by the invention is to provide an upper air inlet double-ring combustor aiming at the inner ring combustion, wherein the primary air supply is sufficient, and the inner ring fire stably burns.

The technical scheme adopted by the invention for solving the technical problems is as follows: an upper air inlet double-ring burner comprises

The bottom plate is embedded on the panel, and a gas pipeline is arranged below the bottom plate;

the nozzle comprises a first nozzle and a second nozzle, is arranged on the upper surface of the bottom plate and is respectively communicated with the gas pipeline;

the base is supported and arranged on the bottom plate, a gap is reserved between the base and the bottom plate, the base comprises an inner ring base body and an outer ring base body which are concentric and arranged at intervals, and the outer ring base body is arranged on the periphery of the inner ring base body;

the fire cover comprises an inner ring fire cover and an outer ring fire cover, the inner ring fire cover is covered on the inner ring seat body in a matching manner and forms an inner ring air mixing chamber with the inner ring seat body, and the outer ring fire cover is covered on the outer ring seat body in a matching manner and forms an outer ring air mixing chamber with the outer ring seat body;

the method is characterized in that: also comprises

The inner injection pipe is horizontally arranged above the bottom plate and is connected with the inner ring seat body, and an inlet of the inner injection pipe faces the first nozzle;

the outer injection pipe is horizontally arranged above the bottom plate and is connected with the outer ring seat body, and an inlet of the outer injection pipe faces the second nozzle;

the first nozzle is arranged on the outer side of the second nozzle, and an included angle is formed between the spraying direction of the first nozzle and the spraying direction of the second nozzle.

In order to further avoid air competition of the first nozzle and the second nozzle in height, the gas injection openings of the first nozzle and the second nozzle are at different heights.

In order to match the requirement of large-flow mixed gas of the outer ring gas mixing chamber, at least two outer injection pipes are arranged, the outer injection pipes are uniformly distributed along the circumferential direction of the inner ring seat body, and each outer injection pipe is correspondingly provided with a second nozzle.

Compact structure ground, each draws the periphery wall tangent of penetrating pipe and inner ring pedestal outward.

Preferably, the spraying direction of the first nozzle and the spraying direction of each second nozzle have an included angle.

Reasonably, the outer injection pipe is provided with two, the jetting directions of the two corresponding second nozzles are opposite, and the first nozzle is close to one second nozzle and forms an acute angle with the included angle between the close second nozzles.

Preferably, a flow guide plate is arranged on the outer peripheral wall of the inner ring seat body along the circumferential direction, the flow guide plate gradually inclines downwards from inside to outside along the radial direction, and a gap is formed between the edge of the flow guide plate and the outer ring seat body. The inner ring seat body and the outer ring seat body are fixedly connected through an outer injection pipe, and an inlet of the outer injection pipe and the second nozzle are both positioned below the flow guide plate.

Preferably, the first nozzle and the inlet of the inner injection pipe are both located below the outer ring seat body.

Preferably, the bottom surface of the inner ring air mixing chamber is gradually inclined upward from the outlet of the inner injection pipe in the circumferential direction.

Preferably, the bottom surface of the outer ring air mixing chamber gradually inclines upwards from the outlet of the outer injection pipe along the circumferential direction.

In order to facilitate installation, the base, the inner injection pipe and the outer injection pipe are arranged into a first component and a second component which can be vertically butted;

the first component comprises the outer ring seat body, a ring wall forming the upper part of the inner ring seat body and an upper half shell forming the upper part of the outer injection pipe, and the upper half shell is connected below the outer ring seat body and communicated with a cavity in the outer ring seat body;

the second component including constitute the cup spare of inner ring pedestal lower part the interior ejector tube and constitute and draw the lower half casing of pipe lower part outward, draw the union coupling in and be linked together with the cavity in the cup spare on the cup spare, cup spare can dock mutually with the rampart and constitute the inner ring pedestal, half casing connection is on the lateral wall of cup spare down, half casing can dock mutually with first casing and constitute and draw the pipe outward.

Compared with the prior art, the invention has the advantages that: in the upper air inlet double-ring combustor, the first nozzle is arranged on the outer side of the second nozzle, so that sufficient primary air injected into the inner injection pipe by the first nozzle can be ensured during operation, meanwhile, due to the fact that an included angle is formed between the injection direction of the first nozzle and the injection direction of the second nozzle, competition of the first nozzle and the second nozzle for the injected primary air is avoided from a horizontal area, in addition, air outlets of the first nozzle and the second nozzle are arranged at different heights, competition of the first nozzle and the second nozzle for the injected primary air is further avoided from the aspect of height, and stable combustion of inner ring fire in the upper air inlet double-ring combustor is ensured. In addition, due to the arrangement of the first nozzle, the length of the inner injection pipe is lengthened, the mixing uniformity of mixed gas is improved, the combustion load fluctuation is reduced during combustion of the inner ring fire, and the combustion stability of the inner ring fire is further improved.

Drawings

Fig. 1 is a perspective view of an upper air inlet double-ring burner in an embodiment of the invention.

Fig. 2 is an exploded perspective view of the upper air inlet double-ring burner in the embodiment of the invention.

Fig. 3 is another view of fig. 2.

Fig. 4 is a sectional view of an upper inlet double ring burner in an embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 1 to 4, the upper air inlet double-ring burner in this embodiment includes a bottom plate 1, a nozzle 2, a base 3, a fire cover 4, an inner injection pipe 34, and an outer injection pipe 35.

As shown in fig. 2 and 3, the bottom plate 1 is embedded in the panel 10, the bottom plate 1 is a horizontal plate body capable of being embedded in the panel 10, and a gas pipeline 11 communicated with a gas supply source is arranged below the plate body. And an air outlet hole is arranged on the bottom plate 1.

The nozzle 2 comprises a first nozzle 21 and a second nozzle 22, each of the first nozzle 21 and the second nozzle 22 is connected to the bottom plate 1 corresponding to one of the air outlet holes, so that the first nozzle 21 and the second nozzle 22 are communicated with the gas pipeline 11.

As shown in fig. 4, the base 3 is supported and arranged on the bottom plate 1 with a gap 31 therebetween, the base 3 includes an inner ring seat 32 and an outer ring seat 33 which are concentrically and spaced apart from each other, and the outer ring seat 33 is arranged on the outer periphery of the inner ring seat 32. And the gap 31 between the base 3 and the bottom plate 1 can satisfy the position of air entering the inner ring seat 32, and further provides air for the inner ring air mixing chamber 5 formed by the inner ring seat 32 and the inner ring fire cover 41 described below.

The fire cover 4 comprises an inner ring fire cover 41 and an outer ring fire cover 42, the inner ring fire cover 41 is covered on the inner ring seat body 32 in a matching manner and forms an inner ring air mixing chamber 5 with the inner ring seat body 32, and the outer ring fire cover 42 is covered on the outer ring seat body 33 in a matching manner and forms an outer ring air mixing chamber 6 with the outer ring seat body 33.

The inner injection pipe 34 in this embodiment is horizontally disposed above the bottom plate 1 and connected to the lower portion of the inner ring seat 32, and the inner injection pipe 34 is further communicated with the inner ring air mixing chamber 5. The inlet of the inner ejector tube 34 faces the first nozzle 21.

The outer injection pipe 35 is horizontally arranged above the bottom plate 1 and below the outer ring seat body 33, the outer injection pipe 35 is connected with the outer ring seat body 33 and further communicated with the outer ring air mixing chamber 6, and an inlet of the outer injection pipe 35 faces the second nozzle 22. In this embodiment, the inner ring seat body 32 and the outer ring seat body 33 are connected through the outer injection pipe 35, that is, the outer injection pipe 35 is further connected with the inner ring seat body 32, and in this embodiment, the outer injection pipe 35 is connected to the outer side wall of the inner ring seat body 32.

In this embodiment, draw outward and penetrate pipe 35 and be provided with at least two in order to satisfy the demand of outer loop to more gas, draw outward respectively to penetrate pipe 35 and follow the circumference evenly distributed setting of inner ring pedestal 32, draw outward respectively to penetrate pipe 35 and the tangent connection of the periphery wall of inner ring pedestal 32, draw outward every to penetrate pipe 35 and correspond and set up a second nozzle 22. The outer injection pipe 35 in this embodiment is specifically provided with two.

As shown in fig. 3, one inner ejector pipe 34 is provided, and the first nozzle 21 is arranged at the radial outer side of the second nozzle 22, so that the air supply of the first nozzle 21 is stable, the combustion of the inner ring of the burner is stable, and the influence of temperature fluctuation on the working process of the temperature sensing probe 5 is correspondingly reduced. And the jetting direction of the first nozzles 21 and the jetting direction of each second nozzle 22 have an angle therebetween. In this embodiment, the axial directions of the two injection pipes are parallel and the inlet directions are opposite, the first nozzle 21 is disposed close to one second nozzle 22, and an included angle between the injection direction of the first nozzle 21 and the injection direction of the second nozzle 22 close to the first nozzle 21 is an acute angle, in this embodiment, an included angle between the injection direction of the first nozzle 21 and the injection direction of the second nozzle 22 close to the first nozzle 21 is 45 °, so that the injection direction of the first nozzle 21 is different from the injection directions of the two second nozzles 22. And the heights of the gas ejection ports of the first nozzles 21 and the respective second nozzles 22 are different. The heights of the gas ejection ports of the second nozzles 22 may be set to the same height or the heights of the gas ejection ports of the second nozzles 22 may be set to different heights depending on the number of the second nozzles 22. In this embodiment, the gas ejection port heights of the two second nozzles 22 are at the same height, and the height of the first nozzle 21 is lower than that of the second nozzle 22. The position setting of first nozzle 21 and second nozzle 22 in this embodiment has all avoided first nozzle 21 and second nozzle 22 to drawing the competition of penetrating the air from horizontal area and highly, has improved the air of combustor inner and outer ring and has penetrated the ability, has guaranteed the stability that the inner ring fire burns.

In the conventional upper air inlet burner, the inner ring nozzle 2 which is matched with the inner injection pipe 34 to work is arranged at the innermost side, the inner ring load change is large in the combustion process, the flame form change is also large, and the problem that the inner ring nozzle 2 is heated seriously exists. Different from the arrangement mode of the inner ring nozzle 2 in the existing upper air inlet combustor, the first nozzle 21 is arranged on the radial outer side of the second nozzle 22, the ejection distance of mixed gas is lengthened, the uniformity of gas mixing is improved, and the fluctuation of combustion load is reduced. The first nozzle 21 is arranged on the outer side, so that the cabinet door can be opened and closed without automatic flameout caused by pressure change.

As shown in fig. 2, in the present embodiment, the bottom surface of the inner ring air-mixing chamber 5 is gradually inclined upward in the circumferential direction from the outlet of the inner injection pipe 34. So make the gas that gets into in the inner ring gas mixing chamber 5 form the vortex, increased the gas mixing route for the air current mixes more fully, has also improved the flow velocity of mixing simultaneously.

On outer ring pedestal 33, the bottom surface of outer ring gas mixing chamber 6 draws between the export of penetrating pipe 35 outside two, draws the export of penetrating pipe 35 gradually tilt up along circumference from outside, also makes the gaseous vortex that forms that gets into in the outer ring gas mixing chamber 6, has increased the gas mixing route for the air current mixes more fully, has also improved the velocity of flow who mixes the gas simultaneously, improves combustion efficiency.

In order to realize better matching placement of the inner injection pipe 34, the outer injection pipe 35 and the nozzle 2.

In this embodiment, the base 3, the inner injection pipe 34, and the outer injection pipe 35 are configured as a first member 301 and a second member 302 that can be aligned vertically;

the first member 302 includes the outer ring seat 33, a ring wall 321 forming an upper portion of the inner ring seat 32, and an upper half casing 351 forming an upper portion of the outer injection pipe 35, wherein the upper half casing 351 is connected below the outer ring seat 33 and is communicated with the chamber in the outer ring seat 33. The second member 301 includes a cup member 322 forming a lower portion of the inner ring seat 32, an inner injection pipe 34, and a lower half shell 352 forming a lower portion of the outer injection pipe 35, the inner injection pipe 34 is connected to the cup member 322 and is communicated with a chamber in the cup member 322, the cup member 322 can be butted against the annular wall 321 to form the inner ring seat 32, the lower half shell 352 is connected to an outer sidewall of the cup member 322, and the lower half shell 352 can be butted against the upper half shell 351 to form the outer injection pipe 35.

Because the number of the outer injection pipes 35 is two, the corresponding upper half shell 351 and the lower half shell 352 are respectively provided with two. When mounting, the first member 301 is fixed to the base plate 1 by a fixing member, so that a gap is formed between the first member 301 and the base plate. The distribution positions of the first nozzle 21 and the second nozzle 22 can be clearly seen, so that the inlet of the lower half shell 352 at the lower part of the outer injection pipe 35 can be accurately opposite to the second nozzle 22, and the inlet of the inner injection pipe 34 can be accurately opposite to the first nozzle 21. Then, the second member 302 is mated and butted over the first member 301. The installation is swift convenient.

As shown in fig. 3, in this embodiment, the inlets of the first nozzle 21 and the inner injection pipe 34 are both located below the outer ring seat 33, so that the overflow of the downflow can be prevented from blocking the inlet of the first nozzle 21 or the inner injection pipe 34, and the first nozzle 21 and the inner injection pipe 34 can work normally.

As shown in fig. 1, the top surface of the inner fire cover 41 is gradually inclined downward from the inside to the outside in the radial direction. The outer circumferential wall of the inner ring seat body 32 is circumferentially provided with a flow guide plate 7, the flow guide plate 7 gradually inclines downwards from inside to outside along the radial direction, and the edge of the flow guide plate 7 can extend to the outside of the outer ring seat body 33 and has a gap with the outer ring seat body 33. The inlet of the outer injection pipe 35 and the second nozzle 22 are both positioned below the guide plate 7. In addition, the top surface of the outer ring fire cover 42 in this embodiment is also gradually inclined downward from the inside to the outside in the radial direction.

In operation, if a liquid spill occurs, when the liquid spill flows onto the outer fire cover 42, the liquid will be guided onto the panel 10 by the guiding action of the inclined top surface of the outer fire cover 42. When the overflow flows to the inner fire cover 41, the top surface of the inner fire cover 41 guides the overflow outwards, and the overflow on the inner side of the retainer ring 51 is guided outwards from the notch 511 on the retainer ring 51, so as to prevent the overflow from adhering to the temperature sensing probe 5 and affecting the operation of the temperature sensing probe 5. Meanwhile, the overflowing liquid of the drainage can be drained to the guide plate 7 by the baffle brim 52 and then flows to the position outside the base 3 on the panel 10, so that a user can clean the panel conveniently. In the overflow drainage process, the protective eaves 52 can protect the fire holes on the inner ring fire cover 41, and prevent the fire holes on the inner ring fire cover 41 from being blocked. Meanwhile, the guide plate 7 can guide overflow liquid, and can protect the inlet of the external injection pipe 35 and the second nozzle 22, so that the overflow liquid is prevented from blocking the inlet of the external injection pipe 35 and the second nozzle 22.

Claims

1. An upper air inlet double-ring burner comprises

The gas-fired power generation device comprises a bottom plate (1) embedded on a panel (10), wherein a gas pipeline (11) is arranged below the bottom plate (1);

the nozzle (2) comprises a first nozzle (21) and a second nozzle (22) which are arranged on the upper surface of the bottom plate (1) and are respectively communicated with the gas pipeline (11);

the base (3) is supported and arranged on the bottom plate (1) and has a gap (31) with the bottom plate (1), the base (3) comprises an inner ring seat body (32) and an outer ring seat body (33) which are concentric and arranged at intervals, and the outer ring seat body (33) is arranged on the periphery of the inner ring seat body (32);

the fire cover (4) comprises an inner ring fire cover (41) and an outer ring fire cover (42), the inner ring fire cover (41) is covered on the inner ring seat body (32) in a matching mode and forms an inner ring air mixing chamber (5) with the inner ring seat body (32), and the outer ring fire cover (42) is covered on the outer ring seat body (33) in a matching mode and forms an outer ring air mixing chamber (6) with the outer ring seat body (33);

the method is characterized in that: also comprises

The inner injection pipe (34) is horizontally arranged above the bottom plate (1) and is connected with the inner ring seat body (32), and the inlet of the inner injection pipe (34) faces the first nozzle (21);

the outer injection pipe (35) is horizontally arranged above the bottom plate (1) and is connected with the outer ring seat body (33), and the inlet of the outer injection pipe (35) faces the second nozzle (22);

the first nozzle (21) is arranged outside the second nozzle (22), and an included angle is formed between the spraying direction of the first nozzle (21) and the spraying direction of the second nozzle (22).

2. The upper intake double-ring burner of claim 1, wherein: the heights of the gas outlets of the first nozzle (21) and the second nozzle (22) are different.

3. The upper intake double-ring burner of claim 2, wherein: the outer injection pipes (35) are at least two, the outer injection pipes (35) are uniformly distributed along the circumferential direction of the inner ring base body (32), and each outer injection pipe (35) is correspondingly provided with one second nozzle (22).

4. The upper intake double-ring burner of claim 3, wherein: each outer injection pipe (35) is tangent to the outer peripheral wall of the inner ring seat body (32).

5. The upper intake double-ring burner of claim 3, wherein: an included angle is formed between the spraying direction of the first nozzle (21) and the spraying direction of each second nozzle (22).

6. The upper intake double-ring burner of claim 5, wherein: the outer injection pipe (35) is provided with two, the spraying directions of two corresponding second nozzles (22) are opposite, the first nozzle (21) is close to one second nozzle (22) and an included angle between the first nozzle and the second nozzle (22) is an acute angle.

7. The upper intake double-ring burner according to any one of claims 1 to 6, wherein: a guide plate (7) is arranged on the peripheral wall of the inner ring seat body (32) along the circumferential direction, the guide plate (7) gradually inclines from inside to outside along the radial direction, and a gap is formed between the edge of the guide plate (7) and the outer ring seat body (33); the inner ring seat body (32) and the outer ring seat body (33) are fixedly connected through an outer injection pipe (35), and an inlet of the outer injection pipe (35) and the second nozzle (22) are both located below the guide plate (7).

8. The upper intake double-ring burner according to any one of claims 1 to 6, wherein: the inlets of the first nozzle (21) and the inner injection pipe (34) are positioned below the outer ring seat body (33).

9. The upper intake double-ring burner according to any one of claims 1 to 6, wherein: the bottom surface of the inner ring air mixing chamber (5) is gradually inclined upwards from the outlet of the inner injection pipe (34) along the circumferential direction.

10. The upper intake double-ring burner according to any one of claims 1 to 6, wherein: the bottom surface of the outer ring air mixing chamber (6) gradually inclines upwards from the outlet of the outer injection pipe (35) along the circumferential direction.

11. The upper intake double-ring burner according to any one of claims 1 to 6, wherein: the base (3), the inner injection pipe (34) and the outer injection pipe (35) are arranged into a first component (301) and a second component (302) which can be combined up and down;

the first component (302) comprises the outer ring seat body (33), a ring wall (321) forming the upper part of the inner ring seat body (32) and an upper half shell (351) forming the upper part of the outer injection pipe (35), and the upper half shell (351) is connected below the outer ring seat body (33) and communicated with a chamber in the outer ring seat body (33);

the second component (301) comprises a cup body (322) forming the lower part of the inner ring seat body (32), an inner injection pipe (34) and a lower half shell (352) forming the lower part of the outer injection pipe (35), the inner injection pipe (34) is connected to the cup body (322) and communicated with a cavity in the cup body (322), the cup body (322) can be butted with the ring wall (321) to form the inner ring seat body (32), the lower half shell (352) is connected to the outer side wall of the cup body (322), and the lower half shell (352) can be butted with the upper half shell (351) to form the outer injection pipe (35).