CN220038455U - Injection pipe for burner and burner using same - Google Patents

Abstract

The utility model relates to an injection pipe for a burner and the burner using the injection pipe, the injection pipe is divided into a contraction part, a mixing part and a diffusion part along the air flow direction according to the change of the cross section, and an ejector is arranged towards the air inlet end of the contraction part, and the utility model is characterized in that: the novel burner comprises a burner body, and is characterized by further comprising a sleeve sleeved outside the burner body, wherein the first end of the sleeve is connected with the mixing part of the burner body, the second end of the sleeve is an open end and is connected with the diffusion part on the base of the burner, the second end of the sleeve and the diffusion part jointly enclose an air supplementing channel for supplementing air to the base of the burner, and an opening communicated with the air supply part is formed in the sleeve, compared with the prior art, the novel burner has the advantages that: the air supplementing channel combining natural injection and blowing type supplementary air is provided, so that on one hand, the suction quantity of outside primary air can be greatly improved, on the other hand, blowing and an ejector can be spatially separated, and the influence of a blowing flow field on natural injection of fuel gas is avoided.

Description

Injection pipe for burner and burner using same

Technical Field

The utility model relates to a burner of a gas cooker, in particular to an injection pipe for the burner.

Background

At present, two types of gas burners are mainly used on kitchen ware, one type of gas burners is an injection type gas burner, the gas burner generally comprises a fire cover, an injection pipe and a spray head, one end of the injection pipe corresponding to the spray head is provided with a first air inlet, the injection pipe is communicated with the outside atmosphere through the first air inlet, gas is injected into the injection pipe from the spray head at a high speed, strong injection is formed in the injection pipe, outside air is sucked into the injection pipe from an air inlet, and the gas is mixed with the gas in the injection pipe and then is sent to the fire cover for combustion. The burner has the advantages that: the structure is simple and compact, the primary air injection effect is good, but the primary air injection effect is also insufficient, and the requirement on the air supply pressure of the fuel gas is high; the fuel gas is sprayed out from the nozzle with smaller aperture, the jet flow enters the injection pipe at a high speed, and the surrounding air is sucked into the injection pipe under the turbulent diffusion action of the jet flow, but the introduction amount of the primary air can not be satisfied sometimes due to the negative pressure caused by the nozzle, so that further improvement is needed.

Disclosure of Invention

The first technical problem to be solved by the present utility model is to provide an ejector tube capable of improving the combustion efficiency of fuel gas against the prior art.

The second technical problem to be solved by the present utility model is to provide a burner using the injection pipe against the above state of the art.

A third technical problem to be solved by the present utility model is to provide a burner for increasing the ignition or ignition power against the above state of the art.

The utility model solves the first technical problem by adopting the technical scheme that: this an injection pipe for combustor, this injection pipe, it divide into constriction portion, mixed portion and diffusion portion according to the change of cross section along the air current direction to towards the income gas port end of constriction portion, its characterized in that is provided with the sprayer: the burner is characterized by further comprising a sleeve sleeved outside the injector body, wherein the first end of the sleeve is connected with the mixing part of the injector body, the second end of the sleeve is an open end and is connected with the diffusion part on the base of the burner, the second end of the sleeve and the diffusion part form an air supplementing channel for supplementing air to the base of the burner, and an opening communicated with the air supply part is formed in the sleeve.

Since the air supply passage communicates with the base of the burner, in order to avoid leakage of the fuel gas in the base of the burner, it is preferable that the sleeve is provided with a check valve in the air supply passage, allowing only the air supplied from the air supply portion to flow unidirectionally into the base of the burner. The one-way valve can realize that the air supply part such as a blower can only supply air required in the combustion process to the base of the burner unidirectionally, and the leakage of fuel gas in the base of the burner from the air supplementing channel is avoided.

The check valve structure can adopt the existing structure, in order to adapt to the structure of the injection pipe and the sleeve pipe of the combustor, from the aspect of matching degree of the structure, preferably, the check valve comprises a ring body and at least three flow blocking sheets which are arranged at intervals along the ring body in the circumferential direction, each flow blocking sheet is provided with an upper end part connected with the ring body and a lower end part abutted against the diffusion part, and each flow blocking sheet gradually inclines downwards from the upper end part to the lower end part to a base close to the combustor. When the air supply part works, the lower end parts of the flow blocking sheets are blown away from the diffusion part to open the air supplementing channel, so that air can be supplemented to the base of the burner, and when the air supply part stops working, the lower end parts of the flow blocking sheets are abutted against the diffusion part again, and as the flow blocking sheets gradually incline downwards from the upper end part to the lower end part to the base close to the burner, the inclination direction of the flow blocking sheets is opposite to the outflow direction of fuel gas in the base of the burner, so that fuel gas leakage can be avoided, and the structure is relatively simple and the processing is convenient.

In order to facilitate the abutment of the lower end of each spoiler against the diffuser and to maintain a better tightness with the burner base, it is preferred that said diffuser extends further into the burner base than the second end of said sleeve.

In order to solve the second technical problem, the utility model also provides a burner, which comprises a base, wherein an air inlet of a gas channel of the base is connected with an injection pipe, and is characterized in that: the ejector pipe is defined in any one of the above.

In order to uniformly heat the bottom of the pot and meet the use of big and small fires, the cooker preferably further comprises a fire cover, wherein the fire cover comprises an inner fire cover and an outer fire cover, the injection pipe is divided into a first injection pipe with natural air inlet and a second injection pipe connected with the air supply part, the first injection pipe corresponds to the inner fire cover, and the second injection pipe corresponds to the outer fire cover. Because the combustion load of the inner fire cover in the burner is smaller, the burner is more suitable for injecting fuel gas and primary air in a natural injection mode, and the outer fire cover is used for injecting fuel gas and primary air in a combination of a blast mode and a natural injection mode, so that the burner is suitable for larger combustion load of the outer fire cover in the burner.

Further, the base comprises an inner annular wall, an outer annular wall and a bottom wall connected between the inner annular wall and the outer annular wall, and a concave cavity is formed between the inner annular wall and the outer annular wall in a surrounding manner;

the connecting plate is covered on the concave cavity, at least two communication holes communicated with the concave cavity are also formed in the circumferential direction of the connecting plate, and an extension wall extends upwards from the periphery of the communication hole;

the outer ring gas mixing chamber comprises an inner ring wall surface, an outer ring wall surface and a bottom wall part, wherein the inner ring wall surface and the outer ring wall surface are annularly arranged at intervals concentrically, the bottom wall part is connected with the inner ring wall surface and the outer ring wall surface, an outer fire cover is covered above the inner ring wall surface and the outer ring wall surface, and a through hole communicated with the extension wall of the communication hole is formed in the bottom wall part;

the diffusion part of the second injection pipe extends into the base of the burner, the second end of the sleeve is propped against the base of the burner, and the air supplementing channel is communicated with the concave cavity.

Through the design of base cavity, can form the cavity of similar "cushion chamber", can mix the air that mends from the air supply passageway better and through the gas that the gas inlet end that sets up towards the constriction portion jetted out and the primary air that the nature penetrated, help satisfying the combustion efficiency of combustor high load burning.

In order to solve the third technical problem, preferably, the base is further provided with an internal combustion air chamber independent of the concave cavity in the inner periphery of the inner annular wall, the first injection pipe is communicated with the internal combustion air chamber, a central gas pipe for supplementing air to the ignition channel is further arranged in the internal gas chamber, and the internal combustion air chamber is communicated with the central gas pipe through an air guide channel. The mixed gas formed by the fuel gas and the primary air in the internal combustion air chamber is shunted into the central fuel gas pipe through the designed air guide channel, so that the problem of unsmooth ignition caused by too high air outlet speed of the ignition hole can be avoided, and the ignition success rate of the burner can be improved.

In order to realize the setting of air duct, from the structurally realizable angle, preferably, the internal combustion air chamber with wall between the central gas pipe passes through the connecting rib and connects, air duct sets up on one of them connecting rib, and be provided with interior fire lid on the internal combustion air chamber, interior fire lid is including annular week wall and the roof of covering on this annular week wall, ignition hole and the ignition channel with ignition hole intercommunication have been seted up to the position of corresponding firing pin on the roof, the roof correspond the bottom of ignition channel set up with the gas access hole of central gas pipe intercommunication.

In order to facilitate the communication between the ignition channel and the central gas pipe, the ignition channel is preferably arranged in a straight shape.

Compared with the prior art, the utility model has the advantages that: the first end of the air supplementing channel is far away from an inlet of natural injection, namely a contraction part, so that mutual interference of natural injection and air blasting injection can be avoided, air flowing out of the air supplementing channel can be mixed with fuel gas and/or primary air flowing out of a diffusion part in an injection pipe again, the speed and the mixing degree of the fuel gas and/or primary air injected by the injection pipe are improved, the injection pipe is integrally provided with two sources of the supplementary air, and the relative positions of the two sources of the supplementary air are staggered, so that the suction amount of the primary air outside can be greatly improved, the air blasting and the ejector can be separated in space, and the influence of an air blasting flow field on natural injection of the fuel gas is avoided.

Drawings

FIG. 1 is a schematic view of the structure of an ejector pipe in an embodiment of the present utility model;

FIG. 2 is a partial cross-sectional view of FIG. 1;

FIG. 3 is a schematic view of the burner and the injector tube in an embodiment of the present utility model;

FIG. 4 is a schematic view of a base structure according to an embodiment of the present utility model;

FIG. 5 is a cross-sectional view of FIG. 4;

FIG. 6 is a cross-sectional view of a burner at an angle in an embodiment of the utility model;

FIG. 7 is a cross-sectional view of a burner in another embodiment of the utility model;

FIG. 8 is a schematic structural view of a connecting plate according to an embodiment of the present utility model;

FIG. 9 is a schematic view of the bottom wall of the outer annular plenum in accordance with an embodiment of the present utility model;

fig. 10 is a schematic structural view of a check valve according to an embodiment of the present utility model.

Detailed Description

The utility model is described in further detail below with reference to the embodiments of the drawings.

Example 1

As shown in fig. 1 to 10, is a preferred embodiment of the present utility model. In this embodiment, the ejector tube for the burner is divided into a constriction part 11, a mixing part 12 and a diffusion part 13 along the air flow direction according to the change of the cross section, and an ejector 3 is arranged towards the air inlet end of the constriction part 11, and the ejector tube further comprises a sleeve 4 sleeved outside the ejector body, a first end 41 of the sleeve 4 is connected with the mixing part 12 of the ejector body, a second end 42 of the sleeve 4 is an open end and is connected with the diffusion part 13 on the base 5 of the burner together, the second end 42 of the sleeve 4 and the diffusion part 13 together enclose an air supplementing channel 6 for supplementing air to the base 5 of the burner, and an opening 43 communicated with the air supply part 10 is formed in the sleeve 4. Because the first end 41 of the air supplementing channel 6 is far away from the inlet of natural injection, namely the contraction part 11, the mutual interference of natural injection and blast injection can be avoided, the air flowing out of the air supplementing channel 6 can be mixed with the fuel gas and/or primary air flowing out of the diffusion part 13 in the injection pipe again, on one hand, the speed and the mixing degree of the injection pipe itself for injecting the fuel gas and/or primary air are improved, on the other hand, the injection pipe is integrally provided with two sources of the supplemental air, and the relative positions are staggered, on the other hand, the suction amount of the primary air outside can be greatly improved, on the other hand, the blast can be separated from the ejector 3 in space, and the influence of the blast flow field on the natural injection of the fuel gas is avoided.

Specifically, the sleeve 4 is provided with a one-way valve 7 in the air supply passage 6, which only allows air supplied from the air supply portion 10 to flow unidirectionally into the base 5 of the burner, and the one-way valve 7 is provided to enable the air supply portion 10, such as a blower, to supply only unidirectionally air required in the combustion process to the base 5 of the burner, while avoiding leakage of fuel gas in the burner base 5 from the air supply passage 6. In addition, since the air supplementing channel 6 communicates with the base 5 of the burner to avoid gas leakage in the base 5 of the burner, the check valve 7 of the present embodiment includes the ring 71 and at least three flow blocking pieces 72 circumferentially spaced along the ring 71, each flow blocking piece 72 has an upper end 721 connected to the ring 71 and a lower end 722 abutting against the diffuser 13, each flow blocking piece 72 is gradually inclined downward from the upper end 721 to the lower end 722 toward the base 5 of the burner, when the air supply portion 10 is operated, the lower end 722 of each flow blocking piece 72 is blown away from the diffuser 13 to open the air supplementing channel 6, thereby supplementing air to the base 5 of the burner, and when the air supply portion 10 is stopped, the lower end 722 of each flow blocking piece 72 is abutted against the diffuser 13 again, and since each flow blocking piece 72 is gradually inclined downward from the upper end 721 to the lower end 722 toward the base 5 of the burner, the inclined direction of which is opposite to the gas outflow direction in the base 5 of the burner, the gas leakage can be avoided. In order to facilitate the abutment of the lower end 722 of each flow-blocking piece 72 against the diffuser 13 and to maintain a better tightness with the burner base 5, the diffuser 13 extends further into the burner base 5 than the second end 42 of the sleeve 4.

In addition, the utility model also provides a burner using the injection pipe, the burner comprises a base 5, an air inlet of a gas channel of the base 5 is connected with the injection pipe, the injection pipe is provided with an air supplementing channel 6, in order to uniformly heat the bottom of a pot and meet the use of big and small fire, the fire cover comprises an inner fire cover 8 and an outer fire cover 9, the injection pipe is divided into a first injection pipe 1 with natural air inlet and a second injection pipe 2 connected with an air supply part 10, the first injection pipe 1 corresponds to the inner fire cover 8, and the second injection pipe 2 corresponds to the outer fire cover 9. Because the combustion load of the inner fire cover 8 in the burner is smaller, the burner is more suitable for injecting fuel gas and primary air in a natural injection mode, and the outer fire cover 9 is used for injecting fuel gas and primary air in a combination of a blast mode and a natural injection mode, so that the burner is suitable for larger combustion load of the outer fire cover 9 in the burner. The base 5 includes an inner annular wall 51, an outer annular wall 52, and a bottom wall 53 connecting the inner annular wall 51 and the outer annular wall 52, a cavity 54 is enclosed between the inner annular wall 51 and the outer annular wall 52, a connection plate 20 is covered on the cavity 54, at least two communication holes 201 communicating with the cavity 54 are also formed on the connection plate 20 along the circumferential direction, the periphery of the communication hole 201 extends upwards to form an extension wall 22, correspondingly, the outer annular air mixing chamber 30 includes an inner annular wall 301 and an outer annular wall 302 which are annularly and concentrically arranged at intervals, and a bottom wall 303 connecting the inner annular wall 301 and the outer annular wall 302, an outer fire cover 9 is covered above the inner annular wall 301 and the outer annular wall 302, a through hole 304 communicating with the extension wall 22 of the communication hole 201 is formed in the bottom wall 303, and the diffusion portion 13 of the second injection pipe 2 extends into the base 5 of the burner and the second end 42 of the sleeve 4 abuts against the base 5 of the burner, so that the air supplementing channel 6 communicates with the cavity 54. Through the design of the concave cavity 54 of the base 5, a cavity similar to a buffer cavity can be formed, so that air fed in from the air feeding channel 6 can be better mixed with fuel gas ejected by the ejector 3 arranged towards the air inlet end of the contraction part 11 and primary air naturally ejected in, and the high-load combustion efficiency of the combustor can be met. The base 5 is further provided with an internal combustion air chamber 40 independent of the concave cavity 54 at the inner periphery of the inner annular wall 51, the first injection pipe 1 is communicated with the internal combustion air chamber 40, the internal combustion air chamber 40 is further provided with a central gas pipe 50 for supplementing air to the ignition channel 84, and the internal combustion air chamber 40 is communicated with the central gas pipe 50 through an air guide channel 60. By designing the air guide channel 60 to split the mixed gas of the fuel gas and the primary air in the internal combustion air chamber 40 into the central fuel air pipe 50, the problem of unsmooth ignition caused by too high and urgent air outlet speed of the ignition hole 83 can be avoided, and the ignition success rate of the burner can be improved.

In order to realize the arrangement of the air guide channel 60, the wall surfaces between the internal combustion air chamber 40 and the central gas pipe 50 of the present embodiment are connected by the connecting ribs 70, the air guide channel 60 is provided on one of the connecting ribs 70, the internal combustion air chamber 40 is provided with an internal fire cover 8, the internal fire cover 8 comprises an annular peripheral wall 81 and a top wall 82 covering the annular peripheral wall 81, the top wall 82 is provided with ignition holes 83 and ignition channels 84 communicated with the ignition holes 83 at positions corresponding to the ignition needles, the bottom of the top wall 82 corresponding to the ignition channels 84 is provided with gas inlet holes 85 communicated with the central gas pipe 50, and in addition, the ignition channels 84 are designed to be in a shape of one, so that the ignition channels 84 can be more conveniently communicated with the central gas pipe 50 in length.

To sum up, the burner combines two injection modes of injection pipes, one is natural injection, the other is natural injection and blast type supplementary air, the air supply part 10 for blast can be connected with a controller and a matched sensor, the controller can control the blast amount of the air supply part 10 according to the combustion load of the outer fire cover 9 in the outer ring air mixing chamber 30 of the burner, when the air supply part 10 works, the lower end 722 of each flow blocking piece 72 is blown away from the diffusion part 13 to open the supplementary air channel 6, so that the air can be supplemented to the base 5 of the burner.

Example 2

The structure is substantially the same as that of embodiment 1, the only difference being that: the inner fire cover 8 corresponds to natural injection and blast type air supplementing modes, the outer fire cover 9 corresponds to natural injection, and the ignition needle is arranged on the outer fire cover 9, so that the fire out of the outer fire cover 9 is used as a long-term open fire.

Claims (9)

1. An ejector tube for a burner, which is divided into a constriction (11), a mixing section (12) and a diffusion section (13) along the direction of the air flow according to the change of the cross section, and is provided with an ejector (3) toward the air inlet end of the constriction (11), characterized in that: the novel burner is characterized by further comprising a sleeve (4) sleeved outside the injector body, wherein a first end (41) of the sleeve (4) is connected with the mixing part (12) of the injector body, a second end (42) of the sleeve (4) is an open end and is connected with the diffusion part (13) on the base (5) of the burner together, the second end (42) of the sleeve (4) and the diffusion part (13) enclose an air supplementing channel (6) for supplementing air to the base (5) of the burner together, and an opening (43) communicated with the air supply part (10) is formed in the sleeve (4).

2. An ejector tube for a burner as in claim 1, wherein: the sleeve (4) is provided with a one-way valve (7) in the air supplementing channel (6), and only air provided by the air supply part (10) is allowed to flow into the base (5) of the burner unidirectionally.

3. An ejector tube for a burner as in claim 2, wherein: the check valve (7) comprises a ring body (71) and at least three flow blocking sheets (72) which are arranged at intervals along the ring body (71) in the circumferential direction, each flow blocking sheet (72) is provided with an upper end (721) connected with the ring body (71) and a lower end (722) abutted against the diffusion part (13), and each flow blocking sheet (72) gradually inclines downwards from the upper end (721) to the lower end (722) to a base (5) close to the burner.

4. An ejector tube for a burner as in claim 3, wherein: the diffuser (13) extends further into the base (5) of the burner than the second end (42) of the sleeve (4).

5. The utility model provides a combustor, includes base (5), the air inlet of the gas passageway of base (5) links to each other with the injection pipe, its characterized in that: the ejector tube is defined in any one of claims 1 to 4.

6. The burner of claim 5, wherein: the fire cover comprises an inner fire cover (8) and an outer fire cover (9), wherein the injection pipe is divided into a first injection pipe (1) with natural air inlet and a second injection pipe (2) connected with the air supply part (10), the first injection pipe (1) corresponds to the inner fire cover (8), and the second injection pipe (2) corresponds to the outer fire cover (9).

7. The burner of claim 6, wherein: the base (5) comprises an inner annular wall (51), an outer annular wall (52) and a bottom wall (53) connected between the inner annular wall (51) and the outer annular wall (52), and a concave cavity (54) is formed between the inner annular wall (51) and the outer annular wall (52) in a surrounding mode;

the connecting plate (20) is covered on the concave cavity (54), at least two communication holes (201) communicated with the concave cavity (54) are formed in the connecting plate (20) along the circumferential direction, and extension walls (22) extend upwards from the periphery of the communication holes (201);

the outer ring gas mixing chamber (30) comprises an inner ring wall surface (301) and an outer ring wall surface (302) which are arranged concentrically and at intervals, and a bottom wall part (303) for connecting the inner ring wall surface (301) and the outer ring wall surface (302), wherein an outer fire cover (9) is covered above the inner ring wall surface (301) and the outer ring wall surface (302), and the bottom wall part (303) is provided with a through hole (304) communicated with an extension wall (22) of the communication hole (201);

the diffusion part (13) of the second injection pipe (2) extends into the base (5) of the burner, the second end (42) of the sleeve (4) is propped against the base (5) of the burner, and the air supplementing channel (6) is communicated with the concave cavity (54).

8. The burner of claim 7, wherein: the base (5) is further provided with an internal combustion air chamber (40) independent of the concave cavity (54) on the inner periphery of the inner annular wall (51), the first injection pipe (1) is communicated with the internal combustion air chamber (40), a central gas pipe (50) for supplementing air to an ignition channel (84) is further arranged in the internal combustion air chamber (40), and the internal combustion air chamber (40) is communicated with the central gas pipe (50) through an air guide channel (60).

9. The burner of claim 8, wherein: the gas guide device is characterized in that the wall surface between the internal combustion gas chamber (40) and the central gas pipe (50) is connected through connecting ribs (70), the gas guide channel (60) is arranged on one connecting rib (70), an internal fire cover (8) is arranged on the internal combustion gas chamber (40), the internal fire cover (8) comprises an annular peripheral wall (81) and a top wall (82) covering the annular peripheral wall (81), an ignition hole (83) and an ignition channel (84) communicated with the ignition hole (83) are arranged on the top wall (82) at the position corresponding to an ignition needle, and a gas inlet hole (85) communicated with the central gas pipe (50) is arranged at the bottom of the top wall (82) corresponding to the ignition channel (84).