CN220249981U

CN220249981U - Diesel combustion chamber

Info

Publication number: CN220249981U
Application number: CN202321801316.1U
Authority: CN
Inventors: 徐启生; 张厚雄
Original assignee: Guilin Nongweishi Intelligent Machinery Co ltd
Current assignee: Guilin Nongweishi Intelligent Machinery Co ltd
Priority date: 2023-07-10
Filing date: 2023-07-10
Publication date: 2023-12-26
Anticipated expiration: 2033-07-10

Abstract

The utility model discloses a diesel combustion chamber, which comprises an end cover, a combustion chamber and a heat exchange chamber which are sequentially connected, wherein the end cover is arranged at the front end opening of the combustion chamber; an oil inlet pipe is arranged at the outer side of the end cover, and an oil distributing groove communicated with the oil inlet pipe is formed at the inner side of the end cover; the front end in the combustion cavity is provided with a cover plate, a first-stage oil dispersing net, combustion cotton and a combustion net layer by layer, wherein the cover plate covers the outlet of an oil inlet pipe on the oil distributing groove, and the first-stage oil dispersing net covers the oil distributing groove; an ignition port matched with the igniter, a plurality of staggered primary air inlet holes and a plurality of staggered secondary air inlet holes are formed in the outer wall of the combustion cavity, and the ignition port, the primary air inlet holes and the secondary air inlet holes are all positioned behind the combustion net; the heat exchange cavity is fixed through a mounting plate at the rear end of the combustion cavity, a spiral heat exchange tube is arranged in the heat exchange cavity, and an inlet and an outlet of the spiral heat exchange tube are respectively connected with an auxiliary agent inlet and an air outlet pipe. The utility model not only realizes the use of diesel oil as a combustion raw material, but also enables the combustion of the diesel oil to be more sufficient, and obviously improves the heat efficiency.

Description

Diesel combustion chamber

Technical Field

The utility model relates to the technical field of sprayer combustion devices, in particular to a diesel combustion chamber.

Background

Although the combustion value of diesel oil is higher than that of gasoline, most of the existing steam sprayers still use gasoline as heating fuel because diesel oil is not easy to volatilize and ignite, but diesel oil with higher combustion value cannot be used as heating fuel. Patent CN218626961U discloses a diesel combustion chamber of a backpack type electric control small plant protection machine, comprising a combustion chamber and a heat exchange chamber which are connected in sequence; the front end of the combustion cavity is opened and provided with a combustion end cover, and a combustion net and a combustion cotton pad are sequentially arranged in the cavity; the combustion end cover is provided with an oil inlet and an ignition device mounting port, and the inner side of the combustion end cover is provided with an oil distribution net; an air inlet is formed in the side wall of the combustion chamber, a spiral heat exchange tube is arranged in the heat exchange chamber, and an air outlet is formed in the tail portion of the heat exchange chamber. Although the above patent realizes the use of diesel oil as a combustion raw material by improving the structure of the combustion chamber, there are still problems of insufficient combustion of diesel oil and low thermal efficiency.

Disclosure of Invention

The utility model provides a diesel combustion chamber, which overcomes the defects in the prior art, and the structure of the combustion chamber is improved to ensure that the diesel is combusted more fully, thereby remarkably improving the heat efficiency.

The utility model realizes the aim through the following technical scheme:

the diesel combustion chamber comprises an end cover, a combustion chamber and a heat exchange chamber which are connected in sequence, wherein the end cover is arranged at the front end opening of the combustion chamber; an oil inlet pipe is arranged at the outer side of the end cover, and an oil distributing groove communicated with the oil inlet pipe is formed at the inner side of the end cover; the front end in the combustion cavity is provided with a cover plate, a first-stage oil dispersing net, combustion cotton and a combustion net layer by layer, wherein the cover plate covers the outlet of an oil inlet pipe on the oil distributing groove, and the first-stage oil dispersing net covers the oil distributing groove; an ignition port matched with the igniter, a plurality of staggered primary air inlet holes and a plurality of staggered secondary air inlet holes are formed in the outer wall of the combustion cavity, and the ignition port, the primary air inlet holes and the secondary air inlet holes are all positioned behind the combustion net; the heat exchange cavity is fixed through a mounting plate at the rear end of the combustion cavity, a spiral heat exchange tube is arranged in the heat exchange cavity, and an inlet and an outlet of the spiral heat exchange tube are respectively connected with an auxiliary agent inlet and an air outlet pipe.

Furthermore, the inner side of the end cover is symmetrically provided with positioning columns for fixing combustion cotton and combustion nets, and the number of the preferable positioning columns is 4.

Furthermore, a secondary oil dispersing net is arranged at the bottom in the combustion cavity and behind the combustion net.

Furthermore, the combustion chamber is sleeved with an anti-backfire ring, a ventilation gap exists between the anti-backfire ring and the anti-backfire ring, the anti-backfire ring is fixed through a mounting plate, and an ignition through hole corresponding to the ignition port is formed in the outer wall of the anti-backfire ring.

Further, a heat insulation cylinder is sleeved on the periphery of the heat exchange cavity, a ventilation gap exists between the heat exchange cavity and the heat exchange cavity, and the heat insulation cylinder is fixed through a mounting plate.

Furthermore, a fire collecting cover is arranged in front of the combustion chamber and the heat exchange chamber, and a through hole is formed in the middle of the fire collecting cover.

Further, a vertical air inlet is further formed in the center of the top wall of the combustion chamber, and the ignition port is located on one side of the vertical air inlet and is close to the vertical air inlet.

Further, the outer wall of the combustion chamber is also provided with a first-stage air regulating hole and a second-stage air regulating hole which are adjacent to each other, are positioned at the other side of the vertical air inlet hole and are opposite to the ignition port.

Further, the first-stage air inlet hole and the second-stage air inlet hole are respectively and symmetrically distributed between the second-stage air adjusting hole and the second-stage oil dispersing net, and between the ignition port and the second-stage oil dispersing net along the circumference.

Further, the oil distributing groove is arranged horizontally or around the positioning column.

Compared with the prior art, the utility model has the advantages and effects that:

1. according to the utility model, the diesel oil dispersing mode in the combustion cavity is optimized, and the diesel oil is dispersed for multiple times and then gradually diffused by arranging the oil distributing groove, the cover plate and the two-stage oil dispersing net, so that atomized small liquid drops can be continuously formed, the surface area contacted with air is effectively increased, the diesel oil can be rapidly and fully burnt in the combustion cavity, and the thermal efficiency is greatly improved;

2. the utility model optimizes the air inlet mode in the combustion chamber, not only arranges two stages of air inlet holes to ensure the stability and the flow rate of air quantity, but also adds a vertical air inlet hole and two stages of air regulating holes to ensure the circulating trend of flame in the combustion chamber, thereby effectively avoiding the condition of incomplete combustion of diesel oil and ensuring that the diesel oil in all parts of the combustion chamber can be fully combusted;

3. according to the utility model, the fire collecting cover with the opening in the middle is arranged between the combustion cavity and the heat exchange cavity, so that flame can be prevented from flowing into the heat exchange cavity, an air internal circulation loop can be constructed in the combustion cavity, and the combustion efficiency of diesel oil is further improved;

4. because the other side of the combustion chamber is connected with the fan, flame can be prevented from being blown out from each air hole to burn out the fan when the machine is stopped by sleeving the tempering preventing ring on the periphery of the combustion chamber;

5. because the temperature in the heat exchange cavity is very high, the heat insulation cylinder is sleeved on the periphery of the heat exchange cavity, so that unnecessary scalding can be avoided.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is an exploded view of the structure shown in fig. 1.

Fig. 3 is a top view of the structure shown in fig. 1.

Fig. 4 is a cross-sectional view taken along the B-B plane in fig. 3.

Fig. 5 is a schematic structural diagram of an end cover, a cover plate and a first-stage oil-dispersing net according to a first embodiment of the present utility model.

Fig. 6 is a schematic structural diagram of an end cover, a cover plate and a first-stage oil-dispersing net in a second embodiment of the present utility model.

FIG. 7 is a schematic view of the combustion chamber of the present utility model.

Fig. 8 is a top view of the structure shown in fig. 7.

Fig. 9 is a bottom view of the structure shown in fig. 7.

Drawing number identification: 1. the end cover comprises an end cover, 1-1, an oil inlet pipe, 1-2 (a/b), an oil distributing groove, 1-3, a positioning column, 2 (a/b), a cover plate, 3 (a/b), a primary oil distributing net, 4, combustion cotton, 5, a combustion net, 6, a combustion cavity, 6-1, a mounting plate, 6-2, an ignition port, 6-3, a primary air inlet hole, 6-4, a secondary air inlet hole, 6-5, a vertical air inlet hole, 6-6, a primary air regulating hole, 6-7, a secondary air regulating hole, 6-8, a secondary oil distributing net, 6-9, an anti-backfire ring, 7, a heat exchange cavity, 7-1, an auxiliary agent inlet, 7-2, an air outlet pipe, 8, a spiral heat exchange pipe, 9, an igniter, 10, a heat insulating cylinder, 11 and a fire collecting cover.

Detailed Description

The technical solutions in the embodiments of the present utility model are clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The specific embodiments described herein are to be considered in an illustrative sense only and are not intended to limit the utility model.

Example 1

As shown in fig. 1-4, the diesel combustion chamber according to this embodiment includes an end cover 1, a combustion chamber 6 and a heat exchange chamber 7 which are sequentially connected, the end cover 1 is installed at the front end opening of the combustion chamber 6, the heat exchange chamber 7 is fixed by a mounting plate 6-1 at the rear end of the combustion chamber 6, a spiral heat exchange tube 8 is arranged in the heat exchange chamber, and the inlet and outlet of the spiral heat exchange tube 8 are respectively connected with an auxiliary agent inlet 7-1 and an air outlet tube 7-2.

As shown in fig. 1 and 5, an oil inlet pipe 1-1 is arranged on the outer side of an end cover 1, an oil distributing groove 1-2 (a) which is communicated with the oil inlet pipe 1-1 and is horizontally arranged is arranged on the inner side of the end cover 1, an outlet of the oil inlet pipe 1-1 is positioned in the middle of the oil distributing groove 1-2 (a), and 4 positioning columns 1-3 are symmetrically arranged in the middle of the end cover 1.

As shown in fig. 2, the front end in the combustion chamber 6 is provided with a cover plate 2 (a), a first-stage oil dispersing net 3, combustion cotton 4 and a combustion net 5 layer by layer, wherein the first-stage oil dispersing net 3 (a), the combustion cotton 4 and the combustion net 5 are provided with through holes corresponding to the positioning columns 1-3, and the tail ends of the positioning columns 1-3 are welded with the combustion net 5 after sequentially passing through the through holes so as to ensure that the positions of all the components cannot deviate.

As shown in fig. 2 and 5, the cover plate 2 (a) covers only the outlet of the middle oil inlet pipe 1-1 of the oil distributing groove 1-2 (a), the first-stage oil dispersing net 3 (a) covers the oil distributing groove 1-2 (a), when the diesel oil is introduced through the oil inlet pipe 1-1, the diesel oil can be only dispersed to two ends along the oil distributing groove 1-2 (a) under the blocking of the cover plate 2 (a), and then is dispersed to a larger surrounding area through the first-stage oil dispersing net 3 (a) and then is dispersed to the combustion cotton 4.

As shown in fig. 7-9, a vertical air inlet hole 6-5 is formed in the middle of the top wall of the combustion chamber 6, an ignition port 6-2 is formed on one side of the vertical air inlet hole, a first-stage air regulating hole 6-6 and a second-stage air regulating hole 6-7 are formed on the other side of the vertical air inlet hole, and the ignition port 6-2, the first-stage air regulating hole 6-6 and the second-stage air regulating hole 6-7 are in symmetrical relation; the bottom in the combustion chamber 6 and the rear part of the combustion net 5 are also provided with a secondary oil dispersing net 6-8; a plurality of staggered and staggered primary air inlet holes 6-3 and secondary air inlet holes 6-4 are symmetrically distributed between the secondary air regulating holes 6-7 and the secondary oil dispersing net 6-8 as well as between the ignition port 6-2 and the secondary oil dispersing net 6-8 along the circumference; the first-stage air inlet hole 6-3, the second-stage air inlet hole 6-4, the vertical air inlet hole 6-5, the first-stage air regulating hole 6-6 and the second-stage air regulating hole 6-7 are consistent in inner diameter, are smaller than the inner diameter of the ignition port 6-2, and are positioned behind the combustion net 5.

Preferably, the primary air inlet holes 6-3 are located behind the secondary air inlet holes 6-4, and the number of the primary air inlet holes 6-3 is more than that of the secondary air inlet holes 6-4, specifically, 2 primary air inlet holes 6-3 are arranged between every 2 secondary air inlet holes 6-4, as shown in fig. 4;

preferably, 2 vertical air inlet holes 6-5 are arranged side by side along the axial direction, 1 primary air regulating hole 6-6 is arranged along the central axis, and 2 secondary air regulating holes 6-7 are arranged side by side along the axial direction, as shown in fig. 8.

As shown in fig. 1 and 2, the combustion chamber 6 is sleeved with an anti-backfire ring 6-9, a ventilation gap exists between the anti-backfire ring and the anti-backfire ring, the anti-backfire ring 6-9 is welded and fixed by a mounting plate 6-1, and an ignition through hole corresponding to the ignition port 6-2 is formed in the outer wall of the anti-backfire ring.

As shown in fig. 1 and 2, a heat insulation cylinder 10 is sleeved on the periphery of the heat exchange cavity 7, a ventilation gap exists between the heat exchange cavity and the heat exchange cavity, and the heat insulation cylinder 10 is welded and fixed through a mounting plate 6-1.

As shown in fig. 2 and 4, a fire collecting cover 11 is arranged in front of the combustion chamber 6 and the heat exchange chamber 7, and a through hole is formed in the middle of the fire collecting cover 11 and can be fixed at the rear end opening of the combustion chamber 6 in a welding mode or the like.

The working principle of this embodiment is as follows:

1. diesel oil enters through the oil inlet pipe 1-1, is split to two ends along the oil distribution groove 1-2 (a) under the coverage of the cover plate 2 (a), is dispersed to the periphery through the first-stage oil distribution net 3 (a), then gradually diffuses to the combustion cotton 4, and then diffuses to the combustion net 5 under the adsorption guide of the combustion cotton 4, and as the diesel oil is split and dispersed for multiple times and then gradually diffuses, mist droplets can be continuously formed, the surface area contacted with air is effectively increased, and therefore, after the igniter 9 is started, the diesel oil can be rapidly combusted in the combustion cavity 6; secondly, when the diesel oil droplets on the combustion net 5 cannot be completely combusted, the droplets can be gathered downwards to the bottom of the combustion chamber 6, and the secondary oil dispersing net 6-8 can play a role of dispersing diesel oil again at the moment so as to ensure that the diesel oil in the combustion chamber 6 is fully combusted.

2. The first-stage air inlet holes 6-3 and the second-stage air inlet holes 6-4 on the side wall of the combustion cavity 6 are symmetrically staggered and staggered, so that the relative stability of the air inlet quantity in the combustion cavity 6 can be ensured, the circulation speed of air can be increased, and the condition of incomplete diesel combustion is avoided; when the igniter 9 ignites, the vertical air inlet hole 6-5, the first-stage air regulating hole 6-6 and the second-stage air regulating hole 6-7 on the top wall of the combustion cavity 6 can cooperatively play a role in regulating the wind direction, so that the flame always keeps the trend of being sprayed to the middle part and then downwards diffused into the cavity, and the diesel oil in all parts of the combustion cavity 6 can be fully combusted.

3. The fire collecting cover 11 with the opening in the middle is arranged between the combustion chamber 6 and the heat exchange chamber 7, so that flame can be prevented from flowing into the heat exchange chamber 7, an air internal circulation loop can be constructed in the combustion chamber 6, and the combustion efficiency of diesel oil is further improved.

4. Because the other side (close to the end cover 1) of the combustion chamber 6 is connected with the fan, and the tempering prevention ring 6-9 is sleeved on the periphery of the combustion chamber 6, flame can be prevented from being blown out from each air hole to burn out the fan during shutdown.

5. Because the temperature in the heat exchange cavity is very high, the heat insulation cylinder 10 is sleeved on the periphery of the heat exchange cavity 7, so that unnecessary scalding can be avoided.

Example two

As shown in fig. 1 and 6, the difference between the present embodiment and the first embodiment is that the oil distributing groove 1-2 (b) is provided around the 4 positioning posts 1-3 in the middle of the end cover 1, and is divided into a horizontal slotting section and a left-right extending section, specifically, the slotting extends downwards around the left-right sides of the positioning posts 1-3 on the basis of the oil distributing groove 1-2 (a).

The cover plate 2 (b) only covers the horizontal slotting section of the oil distributing groove 1-2 (b), the first-stage oil dispersing net 3 (b) covers the left and right extending sections of the oil distributing groove 1-2 (b), when diesel oil is introduced through the oil inlet pipe 1-1, the diesel oil can only be split to two ends along the horizontal slotting section of the oil distributing groove 1-2 (b) under the blocking of the cover plate 2 (b), and then the diesel oil can be continuously split downwards along the left and right extending sections of the oil distributing groove 1-2 (b), and the diesel oil is dispersed to a larger surrounding area through the first-stage oil dispersing net 3 (b) and then is dispersed to the combustion cotton 4.

Compared with the first embodiment, the oil distributing groove 1-2 (b) of the embodiment has more reasonable structural design, and can better diffuse and distribute diesel oil to the combustion cotton 4 so as to facilitate better and full combustion of the diesel oil.

The embodiments of the present utility model are described in detail above with reference to the drawings, but the present utility model is not limited to the described embodiments. Many changes, modifications, substitutions and alterations are possible to those embodiments without departing from the spirit and scope of the present utility model.

Claims

1. The utility model provides a diesel combustion chamber, includes end cover (1), combustion chamber (6) and heat transfer chamber (7) that connect gradually, and end cover (1) are installed in combustion chamber (6) front end opening, its characterized in that:

an oil inlet pipe (1-1) is arranged at the outer side of the end cover (1), and an oil distributing groove (1-2) communicated with the oil inlet pipe (1-1) is arranged at the inner side of the end cover;

the front end in the combustion cavity (6) is provided with a cover plate (2), a first-stage oil dispersing net (3), combustion cotton (4) and a combustion net (5) layer by layer, wherein the cover plate (2) covers the outlet of an oil inlet pipe (1-1) on the oil distributing groove (1-2), and the first-stage oil dispersing net (3) covers the oil distributing groove (1-2);

an ignition port (6-2) matched with the igniter (9) and a plurality of staggered and staggered primary air inlet holes (6-3) and secondary air inlet holes (6-4) are formed in the outer wall of the combustion cavity (6), and the ignition port (6-2), the primary air inlet holes (6-3) and the secondary air inlet holes (6-4) are all positioned behind the combustion net (5);

the heat exchange cavity (7) is fixed through a mounting plate (6-1) at the rear end of the combustion cavity (6), a spiral heat exchange tube (8) is arranged in the heat exchange cavity, and an inlet and an outlet of the spiral heat exchange tube (8) are respectively connected with an auxiliary agent inlet (7-1) and an air outlet tube (7-2).

2. A diesel fuel combustion chamber as claimed in claim 1, wherein: the inner side of the end cover (1) is symmetrically provided with positioning columns (1-3) for fixing combustion cotton (4) and a combustion net (5), and the number of the preferable positioning columns (1-3) is 4.

3. A diesel fuel combustion chamber as claimed in claim 1, wherein: the bottom in the combustion chamber (6) and the rear part of the combustion net (5) are also provided with a secondary oil dispersing net (6-8).

4. A diesel fuel combustion chamber as claimed in claim 1, wherein: the combustion chamber (6) is sleeved with an anti-backfire ring (6-9), a ventilation gap exists between the anti-backfire ring and the anti-backfire ring, the anti-backfire ring (6-9) is fixed through a mounting plate (6-1), and an ignition through hole corresponding to the ignition port (6-2) is formed in the outer wall of the anti-backfire ring.

5. A diesel fuel combustion chamber as claimed in claim 1, wherein: the periphery of the heat exchange cavity (7) is sleeved with a heat insulation cylinder (10), a ventilation gap exists between the heat exchange cavity and the heat insulation cylinder, and the heat insulation cylinder (10) is fixed through a mounting plate (6-1).

6. A diesel fuel combustion chamber as claimed in claim 1, wherein: the combustion chamber (6) and the heat exchange chamber (7) are provided with a fire collecting cover (11), and a through hole is formed in the middle of the fire collecting cover (11).

7. A diesel fuel combustion chamber as claimed in claim 1, wherein: the center of the top wall of the combustion cavity (6) is also provided with a vertical air inlet hole (6-5), and the ignition port (6-2) is positioned at one side of the vertical air inlet hole (6-5) and is adjacent to the vertical air inlet hole.

8. A diesel fuel combustion chamber as claimed in claim 7, wherein: the outer wall of the combustion chamber (6) is also provided with a first-stage air regulating hole (6-6) and a second-stage air regulating hole (6-7) which are adjacent to each other, are positioned on the other side of the vertical air inlet hole (6-5) and are opposite to the ignition port (6-2).

9. A diesel fuel combustion chamber as claimed in claim 8, wherein: the primary air inlet holes (6-3) and the secondary air inlet holes (6-4) are respectively circumferentially distributed between the secondary air adjusting holes (6-7) and the secondary oil dispersing net (6-8), and the ignition port (6-2) and the secondary oil dispersing net (6-8).

10. A diesel fuel combustion chamber as claimed in claim 2, wherein: the oil distributing grooves (1-2) are arranged horizontally or around the positioning columns (1-3).