CN213453623U

CN213453623U - Ejector for combustor

Info

Publication number: CN213453623U
Application number: CN202021636250.1U
Authority: CN
Inventors: 刘晓刚; 柯情; 王帅东; 俞瑜
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2020-08-07
Filing date: 2020-08-07
Publication date: 2021-06-15
Anticipated expiration: 2030-08-07

Abstract

The utility model relates to an ejector for a combustor, which comprises an ejector pipe, a nozzle seat and an air door sleeve, wherein the nozzle seat and the ejector pipe are arranged oppositely, the air door sleeve is sleeved on a nozzle, and the outer wall of the air door sleeve is provided with an air inlet notch which is communicated along the air inlet direction; the size of the gap between the outer wall of the air door sleeve and the inner wall of the air inlet end can be changed by adjusting the distance between the air door sleeve and the air inlet end, and the air flow entering the injection pipe is further controlled. The outer wall of the air door sleeve is provided with an air inlet notch which is communicated along the air inlet direction, and the air inlet notch is arranged at the position of the air door sleeve, which is close to the air inlet end. The arrangement of the air inlet notch can ensure that the air door sleeve is in the adjusting process, even if the front end of the air door sleeve is in contact with the air inlet end, air can still enter the injection pipe from the air inlet notch of the air door sleeve, and then cliff-breaking jumping of the air inlet amount caused by the distance change between the air door sleeve and the air inlet end is avoided to the greatest extent, and the unstable flame condition is avoided.

Description

Ejector for combustor

Technical Field

The utility model relates to a gas cooking utensils field especially relates to an ejector for combustor.

Background

The gas stove is a common kitchen ware in daily life, and the ejector is one of core components of the gas stove and is used for mixing gas and air to form certain pressure, so that resistance loss of a channel is overcome, certain speed is obtained at a fire hole outlet, heat flow required by the burner is ensured, and stability of burning flame is ensured.

Most of existing stove burners on the market are atmospheric burners, partial primary air needs to be premixed in advance, and therefore the amount of the required premixed primary air needs to be adjusted by an air door opening size adjusting device. Currently, there are two most common methods: one is that the effective circulation area of the primary air suction inlet is changed by rotating the air adjusting plate and moving the air adjusting plate back and forth, so as to adjust the suction amount of the primary air; when the air adjusting plate is abutted to the injection pipe, the air adjusting plate in the form can continuously rotate towards the injection pipe, so that the air adjusting plate is blocked and cannot easily rotate back; the second is that the air adjusting plate is rotatably connected to the injection pipe, the primary air suction amount is changed by changing the coincidence degree of the opening of the air adjusting plate and the primary air suction inlet, for example, the Chinese utility model patent with the patent number of CN201721397270.6 (publication number of CN207527586U) discloses a novel burner air door adjusting device and a gas stove, the burner air door adjusting device comprises a nozzle, a nozzle seat and an injection pipe connected with a stove head seat, the injection pipe is provided with an external thread, the inner cavity of the stove head seat is provided with an internal thread, and the injection pipe moves at a horizontal position through a thread locking position between the two; the inner cavity of the stove head seat is internally provided with an inner step, the injection pipe is provided with a second limit step, a spring is arranged between the inner step and the second limit step, the injection pipe penetrates through the spring and is screwed into the inner cavity of the stove head seat, and the opening degree of the air door is opened to be large or small through screwing in or screwing out the injection pipe.

Although the air door realizes adjustment of flame state, the two steps are in direct sealing contact, once the distance is too close, cutoff is easy to occur along with the reduction of the distance between the air door and the injection pipe opening, the safety hazard is caused, meanwhile, the change rate of the sectional area of the whole air inlet is too fast, the air inlet amount is caused to jump in a cliff-breaking mode, when the adjustment is carried out, the required range is often not adjusted, or the range of operability regulation and control is very small, multiple times of adjustment can be well controlled, and non-professionals are more difficult to adjust.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to prior art's current situation, provide an ejector for combustor that can last the air inlet and can carry out linear regulation to the intake.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: an injector for a combustor comprising:

an injection pipe having an air inlet end;

the nozzle seat is arranged opposite to the injection pipe and is positioned at a position close to the air inlet end of the injection pipe, and the nozzle seat is provided with a nozzle which is arranged corresponding to the air inlet end;

the air door sleeve is sleeved on the nozzle, and a gap for air flow to enter the ejector pipe is formed between the outer wall of the air door sleeve and the inner wall of the air inlet end;

the air door sleeve is provided with a radial or/and axial through air inlet notch on the outer wall, and the air inlet notch is arranged at the position of the air door sleeve adjacent to the air inlet end.

In order to ensure that the air inlet gaps can uniformly supply air, the number of the air inlet gaps is at least two, and the air inlet gaps are arranged along the circumferential direction of the outer wall of the air door sleeve at intervals.

The air door sleeve can be of different structures for realizing air inlet, preferably, in order to ensure that the air inlet end of the injection pipe is matched and the air inlet amount can be adjusted, the air door sleeve comprises a connecting sleeve and an air guide sleeve, the connecting sleeve is used for being connected to the outer peripheral wall of the nozzle seat, the air guide sleeve is arranged at the front end of the connecting sleeve, the outer wall of the air guide sleeve is provided with a conical outer peripheral surface, the conical outer peripheral surface is matched with a conical surface of the inner wall of the air inlet end, the outer diameter of the conical outer peripheral surface is gradually increased from front to back, and a gap is formed between the outer peripheral surface and the conical surface.

In order to ensure that the air inlet gap can realize linear adjustment of the air inlet amount, the air inlet gap comprises a first gap arranged on the outer wall of the air guide sleeve. Therefore, through the arrangement of the first notch, when the air guide sleeve is close to the air inlet end, air can be supplemented into the air inlet end through the first notch, and the phenomenon that the air inlet amount is greatly reduced due to the fact that the outer wall surface of the air guide sleeve is close to the inner wall of the air inlet end is avoided.

In order to further ensure that the air door sleeve can realize linear adjustment in the adjustment process, the air door sleeve further comprises a baffle ring arranged between the connecting sleeve and the air guide sleeve, the air inlet notch further comprises a second notch which is arranged on the baffle ring and is communicated along the axial direction, at least two second notches are arranged at intervals along the circumferential direction of the baffle ring, and each second notch is provided with a first notch corresponding to the second notch.

In order to ensure that the air inflow of the whole air inlet end keeps a gradually decreasing trend when the air door sleeve is adjusted to the air inlet end, the width of the second notch in the circumferential direction of the baffle ring is m, the width of the first notch in the circumferential direction of the air guide sleeve is n, and the width m is less than or equal to n.

Preferably, the injection pipe comprises a contraction section, a straight pipe section and an expansion section which are sequentially arranged along the airflow flowing direction, the cross section of the contraction section is gradually reduced along the airflow flowing direction, the cross section area of each part of the straight pipe section is equal, and the cross section area of the expansion section is gradually increased.

Furthermore, in order to ensure the connection between the nozzle holder and the injection pipe, the injection pipe is provided with two injection pipes, the two injection pipes are arranged side by side and are respectively communicated with an inner ring channel and an outer ring channel of the combustor, the two injection pipes are provided with connecting pieces extending outwards on the outer wall, and the two ends of the nozzle holder are respectively connected to the corresponding connecting pieces.

Compared with the prior art, the utility model has the advantages of: this an ejector for combustor through the air door cover that sets up on the nozzle holder, can adjust the interval of air door cover and air inlet end, just can change the size in clearance between the outer wall of air door cover and the inner wall of air inlet end, and then the control gets into what of ejector pipe air current. The outer wall of the air door sleeve is provided with an air inlet notch which is communicated along the air inlet direction, and the air inlet notch is arranged at the position of the air door sleeve, which is close to the air inlet end. The arrangement of the air inlet notch can ensure that the air door sleeve is in the adjusting process, even if the front end of the air door sleeve is in contact with the air inlet end, air can still enter the injection pipe from the air inlet notch of the air door sleeve, and then cliff-breaking jumping of the air inlet amount caused by the distance change between the air door sleeve and the air inlet end is avoided to the greatest extent, and the unstable flame condition is avoided.

Drawings

Fig. 1 is a schematic overall structure diagram of the ejector in the embodiment;

FIG. 2 is a schematic structural view of the ejector tube in FIG. 1;

FIG. 3 is a schematic structural diagram of the damper cover according to the present embodiment;

FIG. 4 is a schematic view of the damper sleeve of this embodiment in a state away from the air inlet end;

fig. 5 is a schematic view of the damper cover of the present embodiment in a state of being close to the air inlet end.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 5, in this embodiment, the injector for a burner includes an injection pipe 1, a nozzle holder 2 and an air door sleeve 3, where the injection pipe 1 has an air inlet 1a, the nozzle holder 2 is arranged opposite to the injection pipe 1 and is located at a position adjacent to the air inlet 1a of the injection pipe 1, the nozzle holder 2 is provided with a nozzle 21 arranged corresponding to the air inlet 1a, the air door sleeve 3 is substantially cylindrical and is sleeved on the nozzle holder 2, a gap 1b for air to flow into the injection pipe 1 is formed between an outer wall of the air door sleeve 3 and an inner wall of the air inlet 1a, and the air door sleeve 3 can move back and forth along an axial direction of the nozzle 21 to increase or decrease the gap 1 b; the air door sleeve 3 is provided with an air inlet notch 30 which is arranged on the outer wall of the air door sleeve in a penetrating way in the radial direction or/and the axial direction, and the air inlet notch 30 is arranged at the position of the air door sleeve 3 adjacent to the air inlet end 1 a.

In this embodiment, in order to further ensure that the air intake amount can be adjusted more finely, at least two air intake notches 30 are arranged at intervals along the circumferential direction of the outer wall of the air door sleeve 3.

The air door sleeve 3 can be in different structural forms, in this embodiment, the air door sleeve 3 includes a connecting sleeve 31 for connecting to the outer peripheral wall of the nozzle holder 2, an air guiding sleeve 32 disposed at the front end of the connecting sleeve 31, and a baffle ring 33 disposed between the connecting sleeve and the air guiding sleeve 32, the outer wall of the air guiding sleeve 32 has a conical outer peripheral surface 32a, the conical outer peripheral surface 32a is matched with a conical surface 1c of the inner wall of the air inlet end 1a, the outer diameter of the conical outer peripheral surface 32a gradually increases from front to back, and a gap 1b is formed between the outer peripheral surface 32a and the conical surface 1 c. The air inlet notch 30 includes a first notch 3a disposed on the outer wall of the air guide sleeve 32 and a second notch 3b disposed on the baffle ring 33 and penetrating along the axial direction, at least two second notches 3b are arranged at intervals along the circumferential direction of the baffle ring 33, and for each second notch 3b, there is a first notch 3a corresponding to it, in order to further ensure that when the air door sleeve 3 is adjusted to the air inlet end 1a, the air intake amount of the whole air inlet end 1a keeps a trend of gradually decreasing, the width of the second notch 3b in the circumferential direction of the baffle ring 33 is m, the width of the first notch 3a in the circumferential direction of the air guide sleeve 32 is n, wherein the width m is not more than n.

In this embodiment, draw and penetrate pipe 1 and include the shrink section 11 that arranges in proper order along the air current direction of flow, straight tube section 12 and expansion section 13, along the air current direction of flow, the cross section of shrink section 11 reduces gradually, the cross-sectional area of straight tube section 12 each department equals, the cross-sectional area of expansion section 13 increases gradually, foretell draw and penetrate pipe 1 and have two, two draw and penetrate pipe 1 and arrange side by side and communicate the inner ring passageway and the outer ring passageway of combustor respectively, two draw and penetrate and all outwards extend on pipe 1's the outer wall and have connecting piece 4, the both ends of nozzle holder 2 are connected respectively on the connecting piece 4 that corresponds separately.

In this embodiment, the nozzle holder 2 has a bottom plate, a threaded column is disposed on the bottom plate and faces the injection pipe 1, and an internal thread in threaded engagement with the threaded column is disposed on the connection sleeve 31 of the damper housing 3. When the air door is used, the air door sleeve 3 only needs to be manually rotated to move on the threaded column, and then the distance between the air door sleeve 3 and the air inlet port 1a is adjusted.

Claims

1. An injector for a combustor comprising:

an injection pipe (1) having an air inlet end (1 a);

the nozzle seat (2) is arranged opposite to the injection pipe (1) and is positioned at a position close to an air inlet end (1a) of the injection pipe (1), and the nozzle seat (2) is provided with a nozzle (21) which is arranged corresponding to the air inlet end (1 a);

the air door sleeve (3) is sleeved on the nozzle seat (2), and a gap (1b) for air flow to enter the injection pipe (1) is formed between the outer wall of the air door sleeve (3) and the inner wall of the air inlet end (1 a);

the method is characterized in that: the air door sleeve (3) is provided with an air inlet notch (30) which is communicated along the radial direction or/and the axial direction on the outer wall of the air door sleeve, and the air inlet notch (30) is arranged at the position, adjacent to the air inlet end (1a), of the air door sleeve (3).

2. The eductor as defined in claim 1, wherein: the number of the air inlet gaps (30) is at least two, and the air inlet gaps are arranged along the circumferential direction of the outer wall of the air door sleeve (3) at intervals.

3. The eductor as defined in claim 2, wherein: the air door sleeve (3) comprises a connecting sleeve (31) used for being connected to the outer peripheral wall of the nozzle seat (2) and an air guide sleeve (32) arranged at the front end of the connecting sleeve (31), the outer wall of the air guide sleeve (32) is provided with a conical outer peripheral surface (32a), the conical outer peripheral surface (32a) is matched with a conical surface (1c) of the inner wall of the air inlet end (1a), the outer diameter of the conical outer peripheral surface (32a) is gradually increased from front to back, and a gap (1b) is formed between the outer peripheral surface (32a) and the conical surface (1 c).

4. The eductor as defined in claim 3, wherein: the air inlet notch (30) comprises a first notch (3a) which is arranged on the outer wall of the air guide sleeve (32) and penetrates through the air guide sleeve along the radial direction.

5. The eductor as defined in claim 4, wherein: the air door sleeve (3) further comprises a blocking ring (33) arranged between the connecting sleeve (31) and the air guide sleeve (32), the air inlet notch (30) further comprises a second notch (3b) arranged on the blocking ring (33) and penetrating along the axial direction, at least two second notches (3b) are arranged at intervals along the circumferential direction of the blocking ring (33), and each second notch (3b) is provided with a first notch (3a) corresponding to the second notch.

6. The eductor as defined in claim 5, wherein: the width of the second notch (3b) in the circumferential direction of the baffle ring (33) is m, the width of the first notch (3a) in the circumferential direction of the air guide sleeve (32) is n, and the width m is less than or equal to n.

7. The eductor as defined in claim 1, wherein: the injection pipe (1) comprises a contraction section (11), a straight pipe section (12) and an expansion section (13) which are sequentially arranged along the airflow flowing direction, the cross section of the contraction section (11) is gradually reduced along the airflow flowing direction, the cross sectional areas of all the parts of the straight pipe section (12) are equal, and the cross sectional area of the expansion section (13) is gradually increased.

8. The eductor as defined in claim 7, wherein: draw and penetrate pipe (1) and have two, two draw and penetrate pipe (1) and arrange side by side and communicate inner ring channel and the outer loop channel of combustor respectively, two draw and all outwards extend on the outer wall of penetrating pipe (1) and have connecting piece (4), the both ends of nozzle holder (2) are connected respectively on connecting piece (4) that correspond separately.