CN212430862U

CN212430862U - Fire lid

Info

Publication number: CN212430862U
Application number: CN202020962915.1U
Authority: CN
Inventors: 严力峰; 苏慧玲; 俞瑜
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2021-01-29
Anticipated expiration: 2030-05-29

Abstract

The utility model discloses a fire lid, fire lid has the fire orifice plate, be equipped with the fire hole on the fire orifice plate, be close to on the surface of fire orifice plate the region in fire hole has first depressed part. The utility model discloses a fire lid is through setting up the depressed part on its fire hole board near fire hole to improve near this fire hole open space size, and then can improve near this fire hole's air reserves, with the secondary air that can provide when burning as the fire hole, make the gas in the fire hole fully burn, in order to further improve the combustion rate of gas.

Description

Fire lid

Technical Field

The utility model relates to a combustor field, in particular to fire lid.

Background

When the existing burner is used, air and gas are premixed and then sprayed out from a fire hole of a fire cover for combustion. If the gas quantity is too large or the premixed air is less, the gas can be insufficiently combusted, and the waste of the gas is caused. Although some burners are available on the market to introduce secondary air to increase the combustion rate of the gas, the supplementary amount of secondary air is limited due to structural limitations.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome among the prior art combustor because of secondary air's make-up volume is lower, leads to the defect that whole combustion efficiency is low, provides a fire lid.

The utility model discloses an above-mentioned technical problem is solved through following technical scheme:

a fire cover is provided with a fire hole plate, fire holes are formed in the fire hole plate, and a first concave portion is arranged in an area, adjacent to the fire holes, on the outer surface of the fire hole plate.

In this scheme, adopt above-mentioned structural style, through set up the depressed part on the fire orifice plate near the fire hole, utilize the negative pressure that the gas burning produced to introduce the interior temporary storage of depressed part with outside air, for the fire hole burning provides the secondary air and supplyes, make the gas fully burn, improve the combustion rate of gas.

Preferably, the first concave part is provided with a plurality of concave parts, and the plurality of concave parts are arranged around the fire hole.

In this scheme, adopt above-mentioned structural style, can save more air, make the gas burning more abundant.

Preferably, a plurality of the first concave parts are communicated with each other.

In this scheme, adopt above-mentioned structural style, the air of being convenient for gets into in the inboard depressed part of fire orifice plate from the fire orifice plate outside, is favorable to the burning of gas in the inboard fire orifice.

Preferably, the fire hole plate is provided with a boss, and the opening of the fire hole is arranged on the boss.

In this scheme, adopt above-mentioned structural style, can form bigger air accommodation space between the fire hole, be favorable to providing more secondary air for the fire hole.

Preferably, the boss is a frustum structure with sequentially increasing outer diameters from top to bottom, and the recessed portion extends to the side wall surface of the boss.

In this scheme, adopt above-mentioned structural style, the air in the depressed part of being convenient for flows to the fire hole and mixes with the gas along the lateral wall flow direction of boss.

Preferably, the fire hole channels of the fire holes comprise a first fire hole channel, a second fire hole channel and a third fire hole channel, and the first fire hole channel, the second fire hole channel and the third fire hole channel are sequentially arranged along the gas outlet direction of the fuel gas;

the inner diameters of the first fire hole channel and the third fire hole channel are larger than that of the second fire hole channel.

In this scheme, adopt above-mentioned structural style, the internal diameter through the second fire hole passageway with the mid portion of fire hole passageway is less than first fire hole passageway and third fire hole passageway setting to under the condition of the air input (guaranteed by first fire hole passageway) and the air output (guaranteed by third fire hole passageway) of guaranteeing this fire hole, improve the velocity of flow of gas.

Preferably, the first fire hole channel and the third fire hole channel have channel lengths smaller than the channel length of the second fire hole channel.

In this scheme, adopt above-mentioned structural style, through the channel length of extension second fire hole passageway, produce the tempering of small fire when avoiding the gas volume insufficient, improve the anti tempering ability of whole fire hole.

Preferably, the opening of the first fire hole channel on the fire hole plate is located on the inner surface of the fire hole plate, and the area of the inner surface of the fire hole plate adjacent to the first fire hole channel is provided with a second concave part.

In this scheme, adopt above-mentioned structural style, through setting up the second depressed part, improve the peripheral gas reserves of first fire hole passageway, improve gas supply ability.

Preferably, the fire cover further comprises a spoiler, the spoiler is arranged inside the third fire hole channel, a gas passage in the third fire hole channel is divided into a first passage and a second passage by the spoiler, and the second passage surrounds the first passage.

In this scheme, adopt above-mentioned structural style, set up the air current flow direction in the vortex piece can change the third fire hole passageway, reinforcing gas, air interact when the burning forms the effect of striking, shake, vortex in the third fire hole passageway, increases the violent degree of combustion reaction, also is favorable to the entrainment of secondary air.

Preferably, the spoiler is including establishing the annular portion in third fire hole passageway middle part, the lateral surface of annular portion have with the connecting portion that the inner wall of third fire hole passageway is connected.

On the basis of the common knowledge in the field, the above preferred conditions can be combined at will to obtain the preferred embodiments of the present invention.

The utility model discloses an actively advance the effect and lie in:

the utility model discloses a fire lid is through setting up the depressed part on its fire hole board near fire hole to improve near this fire hole open space size, and then can improve near this fire hole's air reserves, with the secondary air that can provide when burning as the fire hole, make the gas in the fire hole fully burn, in order to further improve the combustion rate of gas.

Drawings

Fig. 1 is a schematic structural view of a fire cover according to a preferred embodiment of the present invention.

Fig. 2 is a cross-sectional view of a fire cover according to a preferred embodiment of the present invention.

Fig. 3 is a partially enlarged view of a portion a in fig. 2.

Description of reference numerals:

fire hole plate 1

Fire hole 2

First fire hole channel 21

Second fire hole channel 22

Third fire hole channel 23

Boss 3

Flow disturbing member 4

First channel 41

Second passage 42

First recess 5

Second recess 6

Detailed Description

The present invention will be more clearly and completely described below by way of examples and with reference to the accompanying drawings, but the present invention is not limited thereto.

As shown in fig. 1-3, a fire lid of this embodiment includes a fire hole plate 1, and a periphery of the fire hole plate 1 is used to be mounted on a base (not shown) to form a gas mixing chamber together with the base. The fire hole plate 1 is provided with fire holes 2, and the area of the outer surface (i.e. the surface facing away from the gas mixing chamber side) of the fire hole plate 1 adjacent to the fire holes 2 is provided with a first concave part 5. The fire lid of this embodiment is through setting up first depressed part 5 on its fire hole board 1 near fire hole 2 to improve the open space size near this fire hole 2, and then can improve the air reserves near this fire hole 2, and utilize the negative pressure that the gas combustion produced to introduce the air of outside in the first depressed part 5 temporary storage when burning, with the secondary air that can provide when burning as fire hole 2, make the gas in fire hole 2 fully burn, in order to further improve the combustion rate of gas.

Specifically, as shown in fig. 1, in the present embodiment, the fire hole plate 1 has a plurality of bosses 3 uniformly distributed thereon, the opening of each fire hole 2 is provided on a different boss 3, the bosses 3 are frustum structures with sequentially increasing outer diameters from top to bottom, and the areas between the bosses 3 are the first recesses 5. Or, in other embodiments, the fire hole plate 1 in the region between the bosses 3 further has a first concave portion 5 formed by inward concave, and the side wall of the first concave portion 5 extends to the side wall surface of the boss 3, so that not only a larger air accommodating space can be formed between the fire holes 2, which is beneficial to providing more secondary air for the fire holes 2, but also the air in the first concave portion 5 can flow to the fire holes 2 along the side wall of the boss 3 and be mixed with the fuel gas flowing out from the fire holes 2.

The number of the fire holes 2 can be one or more, the number of the bosses 3 can also be one or more, the openings of part of the fire holes 2 also can not be arranged on the bosses 3, and the specific arrangement number and the specific arrangement mode of the fire holes 2 and the bosses 3 on the fire hole plate 1 are not described in detail herein.

In other embodiments, the fire hole 2 may be a through hole penetrating the fire hole plate 1, and an end surface of an opening of the fire hole 2 is flush with an upper end surface of the fire hole plate 1. In this embodiment, each fire hole 2 is provided at the periphery thereof with a plurality of first recesses 5, and the first recesses 5 may be sequentially disposed around the fire hole 2. With the arrangement of the first concave part 5, the periphery of each fire hole 2 can store more air, so that the gas can be more fully combusted.

In the present embodiment, the plurality of first recesses 5 are communicated with each other, so that air enters the first recess 5 at the middle position of the fire hole plate 1 from the peripheral side of the fire hole plate 1 along the horizontal direction, and combustion of gas in the fire hole 2 at the middle position of the fire hole plate 1 is facilitated.

As shown in fig. 3, in this embodiment, the fire hole channel of the fire hole 2 specifically includes a first fire hole channel 21, a second fire hole channel 22 and a third fire hole channel 23, the first fire hole channel 21, the second fire hole channel 22 and the third fire hole channel 23 are sequentially arranged along the gas outlet direction of the fuel gas, wherein the inner diameters of the first fire hole channel 21 and the third fire hole channel 23 are greater than the inner diameter of the second fire hole channel 22. By setting the inner diameter of the second fire hole channel 22 at the middle portion of the fire hole channel to be smaller than the first fire hole channel 21 and the third fire hole channel 23, the flow rate of the gas is increased while ensuring the amount of air input (ensured by the first fire hole channel 21) and the amount of air output (ensured by the third fire hole channel 23) of the fire hole.

In the present embodiment, the passage length of the first fire hole passage 21 and the third fire hole passage 23 is smaller than the passage length of the second fire hole passage 22. By lengthening the channel length of the second fire hole channel 22, the small fire backfire generated when the gas quantity is insufficient is avoided, and the backfire resistance of the whole fire hole 2 is improved.

In the present embodiment, the opening of the first fire hole port passage 21 on the fire hole plate 1 is located on the inner surface (i.e., the surface facing the gas mixing chamber side) of the fire hole plate 1, and the region on the inner surface of the fire hole plate 1 adjacent to the first fire hole port passage 21 has the second recess 6. Through setting up second depressed part 6, improve the peripheral gas reserves of first fire hole passageway 21 to improve the gas supply ability of gas mixing chamber to the fire lid.

As shown in fig. 2 and 3, in the present embodiment, the fire cover further includes a spoiler 4, the spoiler 4 is disposed inside the third fire hole channel 23, a gas passage in the third fire hole channel 23 is divided into a first passage 41 and a second passage 42 by the spoiler 4, and the second passage 42 surrounds the first passage 41.

Set up the flow direction of the gas that vortex piece 4 can change in the third fire hole passageway 23, flow in first route 41 and second route 42 through making the gas, and join again at the end of vortex piece 4, in order to strengthen the disturbance of gas in the exit of fire hole 2, make gas, air interact when burning, form the effect of striking, shake, vortex at the end of third fire hole passageway 23, increase the violent degree of combustion reaction, also be favorable to the entrainment of secondary air.

Specifically, in this embodiment, the spoiler 4 is specifically configured as an annular portion 4a disposed at the middle position of the third fire hole channel 23, and the outer side surface of the annular portion 4a has a connecting portion 4b connected to the inner wall of the third fire hole channel 23, so as to ensure that the annular portion 4a is fixedly connected to the fire hole plate 1, where the number of the connecting portions 4b of a single spoiler 4 may be one or more. Of course, the spoiler 4 has other structural forms, which are not described in detail herein.

Although specific embodiments of the present invention have been described above, it will be understood by those skilled in the art that this is by way of example only and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and the principles of the present invention, and these changes and modifications are all within the scope of the present invention.

Claims

1. A fire cover comprises a fire hole plate, wherein fire holes are formed in the fire hole plate, and the fire cover is characterized in that a first concave part is formed in the area, adjacent to the fire holes, of the outer surface of the fire hole plate.

2. The fire cover of claim 1 wherein said first plurality of depressions are disposed about said fire aperture.

3. The fire cover of claim 2 wherein a plurality of said first depressions are in communication therewith.

4. The fire cover of claim 1 wherein said fire aperture plate has a boss thereon, said fire aperture opening being provided in said boss.

5. The fire cover of claim 4, wherein the boss is a frustum structure with an increasing outer diameter from top to bottom, and the recess extends to the side wall surface of the boss.

6. The fire cover of claim 1, wherein the fire hole passages of the fire holes include a first fire hole passage, a second fire hole passage and a third fire hole passage, the first fire hole passage, the second fire hole passage and the third fire hole passage being sequentially arranged along a gas outlet direction of the fuel gas;

7. The fire cover of claim 6 wherein the first fire hole passage and the third fire hole passage have passage lengths that are less than the passage length of the second fire hole passage.

8. The fire cover of claim 6 wherein the opening of said first fire hole port is located on the inner surface of said fire hole plate, and the area of said inner surface of said fire hole plate adjacent to said first fire hole port has a second depression.

9. The fire cap of claim 6, further comprising a spoiler, wherein the spoiler is disposed inside the third fire hole channel, the gas passage in the third fire hole channel is divided into a first passage and a second passage by the spoiler, and the second passage surrounds the first passage.

10. The fire cover of claim 9, wherein the spoiler includes an annular portion provided at a middle portion of the third fire hole passage, and an outer side surface of the annular portion has a connection portion connected to an inner wall of the third fire hole passage.