Burner, burner and gas stove

Abstract

The utility model relates to the technical field of kitchen utensils, and discloses a furnace end, a burner and a gas stove. The gas stove comprises a combustor, the combustor comprises a furnace end, the furnace end comprises a furnace end seat, a flexible connecting pipe and a nozzle connecting seat, the furnace end seat comprises a main body part and a first butt joint pipe communicated with the main body part, the nozzle connecting seat comprises a second butt joint pipe, and one end of the flexible connecting pipe is hermetically connected and communicated with the main body part; and the other end of the flexible connecting pipe is connected and communicated with the second butting pipe. The furnace end disclosed by the utility model can smoothly release swelling capacity during tempering, so that gas leakage of the furnace end caused by tempering is avoided. The burner and the gas stove are high in safety and long in service life due to the arrangement of the burner.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, in particular to a stove head, a burner and a gas stove. Background Art

[0002] A gas stove is a very commonly used kitchen appliance. The gas stove includes several burners, which include a burner, a fire cover, a nozzle and other structures. The burner includes a burner seat and an ejector tube. The inner cavity of the burner seat is connected to the inner cavity of the ejector tube. The ejector tube is connected to the nozzle, and the fire cover is arranged on the burner seat. When the burner is working, the nozzle sprays gas into the ejector tube and introduces air. The air and gas are mixed in the inner cavity of the ejector tube and the inner cavity of the burner seat, and then discharged from the fire hole of the fire cover and burned.

[0003] Due to the limitation of molding process, the burners of some high-end series of burners are made into split structures, that is, the burner seat and the ejector tube are formed separately and then connected by fasteners. For this structure, when the burner flashes back (the flame is sucked back into the burner seat and the ejector tube), the connection between the burner seat and the ejector tube expands due to heat. Since the expansion cannot be released due to the restriction of the fasteners, the structure at the connection position will be distorted to a certain extent. When the temperature of the burner drops, a gap will appear at the connection between the burner seat and the ejector tube, which will cause air leakage.

[0004] Therefore, there is an urgent need for a burner, a burner and a gas stove to solve the above-mentioned technical problems. Utility Model Content

[0005] The first purpose of the utility model is to provide a burner head which can smoothly release the expansion amount during tempering and avoid gas leakage of the burner head due to tempering.

[0006] The second purpose of the utility model is to provide a burner which has high safety and long service life by arranging the above-mentioned burner head.

[0007] The third object of the utility model is to provide a gas stove which has high safety and long service life by arranging the above-mentioned burner.

[0008] To achieve this purpose, the utility model adopts the following technical solutions:

[0009] A burner head comprises a burner head seat, a flexible connecting pipe and a nozzle connecting seat, wherein the burner head seat comprises a main body and a first butt joint pipe connected to the main body, the nozzle connecting seat comprises a second butt joint pipe, one end of the flexible connecting pipe is sealed and connected to the main body, and the other end of the flexible connecting pipe is connected and connected to the second butt joint pipe.

[0010] As an optional solution, the flexible connecting pipe is a corrugated pipe.

[0011] As an optional solution, the burner head further includes:

[0012] A first joint piece is sealed and connected to the first butt joint, and one end of the flexible connecting pipe is welded and connected to the first joint piece;

[0013] The second joint piece is sealed and connected to the second butt joint pipe, and the other end of the flexible connecting pipe is welded and connected to the second joint piece.

[0014] As an optional solution, the flexible connecting pipe includes a pipe body and a first welding flange and a second welding flange arranged at two ends of the pipe body;

[0015] A third welding flange is provided at one end of the first joint member facing the flexible connecting pipe, and the first welding flange abuts against and is welded to the third welding flange;

[0016] A fourth welding flange is provided at one end of the second joint member facing the flexible connecting pipe, and the second welding flange abuts against and is welded to the fourth welding flange.

[0017] As an optional solution, the first joint member, the second joint member and the flexible connecting pipe are made of the same material.

[0018] As an optional solution, the end of the first butt joint pipe is provided with a first butt flange, and the end of the second butt joint pipe is provided with a second butt flange;

[0019] A third butt joint flange is provided at one end of the first joint member facing the first butt joint pipe, and the third butt joint flange abuts against and is connected to the first butt joint flange;

[0020] A fourth butt joint flange is disposed on one end of the second joint member facing the second butt joint pipe, and the fourth butt joint flange abuts against and is connected to the second butt joint flange.

[0021] As an optional solution, a first sealing member is sandwiched between the first docking flange and the third docking flange; and / or

[0022] A second sealing member is sandwiched between the second butt flange and the fourth butt flange.

[0023] As an optional solution, in a direction close to the main body:

[0024] The cross-sectional area inside the first butt joint gradually increases; and / or

[0025] The cross-sectional area inside the second butt joint gradually decreases; and / or

[0026] The cross-sectional area of ​​the flexible connecting pipe remains unchanged.

[0027] As an optional solution, an inner ring gas mixing chamber and an outer ring gas mixing chamber are provided in the main body, and two first butt joint tubes are provided, namely a first inner butt joint tube and a first outer butt joint tube, the first inner butt joint tube is communicated with the inner ring gas mixing chamber, and the first outer butt joint tube is communicated with the outer ring gas mixing chamber;

[0028] Two second butt joint tubes are arranged on the nozzle connection seat, and they are respectively a second inner butt joint tube and a second outer butt joint tube;

[0029] The flexible connecting tubes are provided with two, namely an inner flexible connecting tube and an outer flexible connecting tube. The inner flexible connecting tube connects the first inner butt-jointed tube and the second inner butt-jointed tube, and the outer flexible connecting tube connects the first outer butt-jointed tube and the second outer butt-jointed tube.

[0030] As an optional solution, at the corresponding position, the cross-sectional area of ​​the first outer butt joint pipe is greater than the cross-sectional area of ​​the first inner butt joint pipe; and / or

[0031] At the corresponding position, the cross-sectional area of ​​the second outer butt joint pipe is greater than the cross-sectional area of ​​the second inner butt joint pipe; and / or

[0032] The cross-sectional area of ​​the outer flexible connecting tube is greater than the cross-sectional area of ​​the inner flexible connecting tube.

[0033] A burner comprises a nozzle, a fire cover and a burner head, wherein the nozzle is connected to the nozzle connecting seat, and the fire cover is installed on the main body.

[0034] A gas stove comprises a gas supply unit and the burner, wherein the gas supply unit is connected to an external gas source and the nozzle respectively.

[0035] The beneficial effects of the utility model are:

[0036] The burner head of the utility model comprises a burner head seat, a flexible connecting pipe and a nozzle connecting seat, and the two ends of the flexible connecting pipe are respectively connected with a first butt joint pipe on the burner head seat and a second butt joint pipe on the nozzle connecting seat, and the first butt joint pipe, the flexible connecting pipe and the second butt joint pipe constitute the ejector pipe of the burner head. On the one hand, the whole burner head is a split structure, so it can meet the quality requirements of high-end products under the existing production process; on the other hand, the flexible connecting pipe can compensate for the deformation of each connection position due to thermal expansion and contraction through its own deformation. When the burner head is tempered and the temperature rises and expands, the flexible connecting pipe can release the expansion through its own deformation, thereby avoiding plastic deformation at the joint position, and then avoiding the problem of gas leakage in the burner head. When the burner head cools down, the flexible connecting pipe recovers its deformation to ensure the sealing of the connection.

[0037] The burner of the utility model has high safety and long service life by arranging the burner head.

[0038] The gas stove of the utility model has high safety and long service life by arranging the burner. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a structural schematic diagram of a burner provided in a specific embodiment of the utility model;

[0040] Figure 2 It is a partial structural schematic diagram of a furnace head provided in a specific embodiment of the utility model;

[0041] Figure 3 yes Figure 2 A schematic diagram of the structure in another perspective;

[0042] Figure 4 It is a top view of a burner provided in a specific embodiment of the utility model;

[0043] Figure 5 yes Figure 4 AA section view in;

[0044] Figure 6 yes Figure 4 BB section view in;

[0045] Figure 7 It is an exploded view of a burner head provided in a specific embodiment of the utility model.

[0046] In the figure:

[0047] 10. burner head seat; 11. main body; 111. inner ring gas mixing chamber; 112. outer ring gas mixing chamber; 12a. first inner butt joint tube; 12b. first outer butt joint tube; 13. first butt flange;

[0048] 20a, inner flexible connecting pipe; 20b, outer flexible connecting pipe; 21, pipe body; 22, first welding flange; 23, second welding flange;

[0049] 30. Nozzle connection seat; 31a. Second inner butt joint tube; 31b. Second outer butt joint tube; 32. Second butt flange; 33. Gas inlet hole; 34. Air inlet hole; 35. Nozzle connection hole;

[0050] 40a, first inner joint member; 40b, first outer joint member; 41, third welding flange; 42, third butt flange;

[0051] 50a, second inner joint member; 50b, second outer joint member; 51, fourth welding flange; 52, fourth butt flange. DETAILED DESCRIPTION

[0052] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0053] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0055] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0056] The present embodiment provides a burner, a burner and a gas stove. The gas stove includes a gas supply unit and a burner, one end of the gas supply unit is connected to an external gas source, and the other end is connected to the burner. The gas supply unit can be controlled to supply or stop supplying gas to the burner. It is understandable that the gas supply unit includes a pipeline and a valve, and its specific structure is a prior art and is not repeated here. Optionally, the gas stove may include one, two or more burners. The burner includes a nozzle, a burner and a fire cover, wherein one end of the nozzle is connected to the gas supply unit and the other end is connected to the burner, the fire cover is installed on the burner, and a gas mixing channel is formed in the burner. When the burner is working, the nozzle sprays gas into the burner and simultaneously draws air into the burner. After the air and gas are mixed in the burner, they are discharged from the fire hole on the fire cover and burn. In some embodiments, the burner also includes a fire distributor, which is installed on the burner, and the fire cover is arranged on the fire distributor. The mixed gas in the burner first enters the fire distributor, and enters the fire cover after further mixing and distribution by the fire distributor.

[0057] Due to the limitation of molding process, the burners of some high-end series of burners are made into split structures, that is, the burner seat and the ejector tube are formed separately and then connected by fasteners. For this structure, when the burner flashes back (the flame is sucked back into the burner seat and the ejector tube), the connection between the burner seat and the ejector tube expands due to heat. Since the expansion cannot be released due to the restriction of the fasteners, the structure at the connection position will be distorted to a certain extent. When the temperature of the burner drops, a gap will appear at the connection between the burner seat and the ejector tube, which will cause air leakage.

[0058] In this regard, Figure 1 As shown, the burner head includes a burner head seat 10, a flexible connecting pipe and a nozzle connecting seat 30. The burner head seat 10 includes a main body 11 and a first butt joint pipe connected to the main body 11. The nozzle connecting seat 30 includes a second butt joint pipe. One end of the flexible connecting pipe is sealed and connected to the main body 11, and the other end of the flexible connecting pipe is connected and connected to the second butt joint pipe. The first butt joint pipe, the flexible connecting pipe and the second butt joint pipe of the burner head of this embodiment constitute the ejector pipe of the burner head. On the one hand, the entire burner head is a split structure, so it can meet the quality requirements of high-end products under the existing production process; on the other hand, the flexible connecting pipe can compensate for the deformation of each connection position due to thermal expansion and contraction through its own deformation. When the burner head is tempered and the temperature rises and expands, the flexible connecting pipe can release the expansion through its own deformation (such as elongation), thereby avoiding plastic deformation at the joint position, thereby avoiding the problem of gas leakage in the burner head. When the burner head cools down, the flexible connecting pipe recovers its deformation to ensure the sealing of the connection. The burner and gas stove of this embodiment are provided with the above-mentioned burner head, which has high safety and long service life.

[0059] In this embodiment, the flexible connecting tube is a bellows. On the one hand, the bellows can extend accordingly when the burner head is tempered and smoothly release the expansion of each connection position to avoid deformation of each connection position, thereby avoiding leakage of the burner head after cooling; on the other hand, under the influence of the spiral corrugated inner wall structure of the bellows, the movement path of the gas is swirling, which is conducive to the mixing of air and gas. Optionally, the bellows can be a stainless steel bellows, which is an existing standard part with low cost and long service life. In other embodiments, the flexible connecting tube can also be a high temperature resistant rubber tube, which is not limited here.

[0060] like Figure 1-Figure 3 As shown, in this embodiment, an inner ring gas mixing chamber 111 and an outer ring gas mixing chamber 112 are provided in the main body 11, two first butt joint tubes are provided, namely, a first inner butt joint tube 12a and a first outer butt joint tube 12b, the first inner butt joint tube 12a is connected to the inner ring gas mixing chamber 111, and the first outer butt joint tube 12b is connected to the outer ring gas mixing chamber 112. Two second butt joint tubes are provided on the nozzle connection seat 30, namely, a second inner butt joint tube 31a and a second outer butt joint tube 31b, two flexible connecting tubes are provided, namely, an inner flexible connecting tube 20a and an outer flexible connecting tube 20b, the inner flexible connecting tube 20a is connected to the first inner butt joint tube 12a and the second inner butt joint tube 31a, and the outer flexible connecting tube 20b is connected to the first outer butt joint tube 12b and the second outer butt joint tube 31b. The second inner butt joint tube 31a, the second flexible connecting tube, and the first inner butt joint tube 12a constitute an ejector tube, and supply gas to the inner ring gas mixing chamber 111. The second outer butt joint pipe 31b, the outer flexible connecting pipe 20b and the first outer butt joint pipe 12b constitute another ejector pipe and supply gas to the outer ring gas mixing chamber 112. The burner head is provided with two gas mixing chambers and supplies gas to the fire cover respectively, which is conducive to the reasonable distribution of gas and thus controls the distribution of flame.

[0061] like Figure 1 As shown, the end of the second inner butt joint tube 31a away from the inner flexible connecting tube 20a is provided with a gas inlet hole 33, an air inlet hole 34 and a nozzle connection hole 35, and the nozzle is connected to the second inner butt joint tube 31a through the nozzle connection hole 35. The gas enters the second inner butt joint tube 31a through the gas inlet hole 33. Since the gas flow rate ejected by the nozzle is very high, a negative pressure is formed in the second inner butt joint tube 31a. Therefore, the external air enters the second inner butt joint tube 31a from the air inlet hole 34 under the action of the pressure difference. The second outer tube 31b is also provided with a gas inlet hole 33, an air inlet hole 34 and a nozzle connection hole 35, and the intake process is not repeated with the second butt joint tube 31a.

[0062] Optionally, the main body 11, the first inner butt joint tube 12a and the first outer butt joint tube 12b (i.e., the entire burner base 10) can be integrally formed by casting. The second inner butt joint tube 31a and the second outer butt joint tube 31b can also be integrally formed by casting. Of course, in other embodiments, the second outer butt joint tube 31b and the second inner butt joint tube 31a can also be cast separately.

[0063] like Figure 4-Figure 6 As shown, in this embodiment, the cross-sectional area inside the second butt joint tube gradually decreases along the direction close to the main body 11. The second butt joint tube is equivalent to a "contract tube", which not only facilitates the smooth entry of air and gas into the second butt joint tube, but also increases the dynamic pressure of the mixed gas to flow smoothly downstream. The cross-sectional area inside the first butt joint tube gradually increases, that is, the first butt joint tube is equivalent to a "diffusion tube". In the first butt joint tube, the dynamic pressure of the mixed gas is reduced, which is conducive to the full mixing of air and gas. The cross-sectional area of ​​the flexible connecting tube remains unchanged, so that the flexible connecting tube can be selected from the existing corrugated tube, reducing the manufacturing cost.

[0064] Optionally, the flexible connecting pipe may be a section of pipeline, or may be formed by connecting multiple sections of pipeline, which is not specifically limited here.

[0065] Since the heat load of the inner ring of the burner is less than that of the outer ring, the amount of gas required by the inner ring mixing chamber 111 is less than the amount of gas required by the outer ring mixing chamber 112. Figure 5 and Figure 6 As shown, at the corresponding position, the cross-sectional area of ​​the first outer butt joint tube 12b is greater than the cross-sectional area of ​​the first inner butt joint tube 12a; the cross-sectional area of ​​the second outer butt joint tube 31b is greater than the cross-sectional area of ​​the second inner butt joint tube 31a. The cross-sectional area of ​​the outer flexible connecting tube 20b is greater than the cross-sectional area of ​​the inner flexible connecting tube 20a. Explanation of "corresponding positions": the first inner butt joint tube 12a has a first position, the first outer butt joint tube 12b has a second position, the ratio of the distance from the inlet end of the first inner butt joint tube 12a to the first position to the total length of the first inner butt joint tube 12a is ratio one, the ratio of the distance from the inlet end of the first outer butt joint tube 12b to the second position to the total length of the first outer butt joint tube 12b is ratio two, if ratio one is equal to ratio two, the first position and the second position are corresponding positions. Similarly, there is a third position on the second inner butt joint tube 31a, and there is a third position on the second outer butt joint tube 31b. The ratio of the distance from the entrance end of the second inner butt joint tube 31a to the third position to the total length of the second inner butt joint tube 31a is ratio three, and the ratio of the distance from the entrance end of the second outer butt joint tube 31b to the fourth position to the total length of the second outer butt joint tube 31b is ratio four. If ratio three is equal to ratio four, the third position and the fourth position are corresponding positions.

[0066] The ratio of the position on the second inner butt-jointing tube 31a to the entire length of the second inner butt-jointing tube 31a is consistent with the ratio of the position on the second outer butt-jointing tube 31b to the entire length of the second outer butt-jointing tube 31b.

[0067] In order to facilitate the connection of the flexible connecting pipe with the first butt joint and the second butt joint, one end of the flexible connecting pipe is connected to the first butt joint through the first connector, and the other end is connected to the second butt joint through the second connector. Figure 7 As shown, two first joint members are provided, namely, a first inner joint member 40a and a first outer joint member 40b. Two second joint members are provided, namely, a second inner joint member 50a and a second outer joint member 50b. The two ends of the inner flexible connecting tube 20a are connected to the first inner butt joint tube 12a and the second inner butt joint tube 31a through the first inner joint member 40a and the second inner joint member 50a respectively. The two ends of the outer flexible connecting tube 20b are connected to the first outer butt joint tube 12b and the second outer butt joint tube 31b through the first outer joint member 40b and the second outer joint member 50b respectively.

[0068] It should be noted that, in the present embodiment, the first inner joint member 40a and the first outer joint member 40b have the same structure, but the size is slightly different. The inner flexible connecting tube 20a and the outer flexible connecting tube 20b have the same structure, but the size is slightly different. The second inner joint member 50a and the second outer joint member 50b have the same structure, but the size is slightly different. The second inner butt joint 31a and the second outer butt joint 31b have the same structure, but the size is slightly different. In other words, the corresponding parts of the two ejector tubes have the same structure, so the following only describes the connection details between the second inner butt joint 31a, the second inner joint member 50a, the inner flexible connecting tube 20a, the first inner joint member 40a and the first inner butt joint 12a.

[0069] Since the material of the inner flexible connecting tube 20a is different from that of the first inner butt-jointed tube 12a and the second inner butt-jointed tube 31a, if the inner flexible connecting tube 20a is connected to the first inner butt-jointed tube 12a and the second inner butt-jointed tube 31a by welding, the welding is not firm and the sealing is poor. Since the wall thickness of the inner flexible connecting tube 20a is relatively thin, if the inner flexible connecting tube 20a is connected to the first inner butt-jointed tube 12a and the second inner butt-jointed tube 31a by fasteners such as bolts, the strength is insufficient.

[0070] In this regard, in the present embodiment, the first inner joint member 40a is sealed and connected to the first inner butt joint tube 12a, and one end of the inner flexible connecting tube 20a is welded and connected to the first inner joint member 40a. The second inner joint member 50a is sealed and connected to the second inner butt joint tube 31a, and the other end of the inner flexible connecting tube 20a is welded and connected to the second inner joint member 50a. By providing the first inner joint member 40a and the second inner joint member 50a, not only the sealing of the connection between the two ends of the inner flexible connecting tube 20a is ensured, but also the structural strength of the connection position is ensured. Preferably, the materials of the first inner joint member 40a, the second inner joint member 50a and the inner flexible connecting tube 20a are the same, so as to ensure the reliability of welding. In the present embodiment, the first inner joint member 40a, the second inner joint member 50a and the inner flexible connecting tube 20a are all made of stainless steel.

[0071] like Figure 7 As shown, the inner flexible connecting pipe 20a includes a pipe body 21 and a first welding flange 22 and a second welding flange 23 arranged at both ends of the pipe body 21. A third welding flange 41 is arranged at one end of the first inner joint member 40a facing the inner flexible connecting pipe 20a, and the first welding flange 22 and the third welding flange 41 are abutted and welded. A fourth welding flange 51 is arranged at one end of the second inner joint member 50a facing the inner flexible connecting pipe 20a, and the second welding flange 23 and the fourth welding flange 51 are abutted and welded. Through the cooperation of the first welding flange 22 and the third welding flange 41, it is convenient to weld the inner flexible connecting pipe 20a and the first inner joint member 40a, and it is also beneficial to ensure the sealing of the connection between the two. Through the cooperation of the second welding flange 23 and the fourth welding flange 51, it is convenient to weld the inner flexible connecting pipe 20a and the second inner joint member 50a, and it is also beneficial to ensure the sealing of the connection between the two.

[0072] like Figure 7 As shown, a first butt flange 13 is provided at the end of the first inner butt pipe 12a, and a third butt flange 42 is provided at one end of the first inner joint member 40a facing the first inner butt pipe 12a, and the third butt flange 42 abuts against and is connected to the first butt flange 13. The cooperation of the first butt flange 13 and the third butt flange 42 not only facilitates the mechanical connection between the first inner butt pipe 12a and the first joint member, but also helps to ensure the reliability of the connection position between the two. In this embodiment, the first butt flange 13 and the third butt flange 42 can be fixedly connected by fasteners such as bolts.

[0073] The end of the second inner butt joint tube 31a is provided with a second butt flange 32, and the end of the second inner joint member 50a facing the second inner butt joint tube 31a is provided with a fourth butt flange 52, and the fourth butt flange 52 abuts against and is connected to the second butt flange 32. The cooperation between the second butt flange 32 and the fourth butt flange 52 not only facilitates the mechanical connection between the second inner butt joint tube 31a and the second joint member, but also helps to ensure the reliability of the connection position between the two. In this embodiment, the first butt flange 13 and the third butt flange 42 can be fixedly connected by fasteners such as bolts. In this embodiment, the second butt flange 32 and the fourth butt flange 52 can be fixedly connected by fasteners such as bolts.

[0074] In this embodiment, a first sealing member is sandwiched between the first butt flange 13 and the third butt flange 42. The first sealing member can further improve the sealing performance of the connection between the first inner butt pipe 12a and the first inner joint member 40a. Optionally, the first sealing member can be a rubber ring. Optionally, a first limiting groove is provided on one side of the first butt flange 13 or the third butt flange 42 facing each other, and the first sealing member is provided in the first limiting groove to prevent the first sealing member from moving in position, thereby further improving the sealing performance.

[0075] Similarly, a second sealing member is sandwiched between the second docking flange 32 and the fourth docking flange 52. The second sealing member can further improve the sealing performance of the connection between the second inner docking pipe 31a and the second inner joint member 50a. Optionally, the second sealing member can be a rubber ring. Optionally, a second limiting groove is provided on one side of the second docking flange 32 or the fourth docking flange 52 facing each other, and the second sealing member is arranged in the second limiting groove to prevent the second sealing member from moving in position, thereby further improving the sealing performance.

[0076] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the field, according to the idea of ​​the utility model, there will be changes in the specific implementation methods and application scopes, and the content of this specification should not be understood as limiting the utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A furnace head, characterized in that: The invention comprises a burner head seat (10), a flexible connecting pipe and a nozzle connecting seat (30), wherein the burner head seat (10) comprises a main body (11) and a first butt joint pipe connected to the main body (11), and the nozzle connecting seat (30) comprises a second butt joint pipe, one end of the flexible connecting pipe is sealedly connected to and connected to the main body (11), and the other end of the flexible connecting pipe is connected to and connected to the second butt joint pipe.

2. The burner head according to claim 1, characterized in that: The flexible connecting pipe is a corrugated pipe.

3. The burner head according to claim 1, characterized in that: The burner also includes: A first joint piece is sealed and connected to the first butt joint, and one end of the flexible connecting pipe is welded and connected to the first joint piece; The second joint piece is sealed and connected to the second butt joint pipe, and the other end of the flexible connecting pipe is welded and connected to the second joint piece.

4. The burner head according to claim 3, characterized in that: The flexible connecting pipe comprises a pipe body (21) and a first welding flange (22) and a second welding flange (23) arranged at two ends of the pipe body (21); A third welding flange (41) is provided at one end of the first joint member facing the flexible connecting pipe, and the first welding flange (22) is in abutment with and welded to the third welding flange (41); A fourth welding flange (51) is provided at one end of the second joint member facing the flexible connecting pipe, and the second welding flange (23) is abutted against and welded to the fourth welding flange (51).

5. The burner head according to claim 3, characterized in that: The first joint member, the second joint member and the flexible connecting pipe are made of the same material.

6. The burner head according to claim 3, characterized in that: A first docking flange (13) is provided at the end of the first butt joint pipe, and a third docking flange (42) is provided at one end of the first joint member facing the first butt joint pipe, wherein the third docking flange (42) abuts against and is connected to the first butt flange (13); A second docking flange (32) is provided at the end of the second docking pipe, and a fourth docking flange (52) is provided at one end of the second joint piece facing the second docking pipe. The fourth docking flange (52) abuts against and is connected to the second docking flange (32).

7. The burner head according to claim 6, characterized in that: A first sealing member is sandwiched between the first docking flange (13) and the third docking flange (42); and / or A second sealing member is sandwiched between the second docking flange (32) and the fourth docking flange (52).

8. The burner head according to claim 1, characterized in that: Along the direction close to the main body (11): The cross-sectional area inside the first butt joint gradually increases; and / or The cross-sectional area inside the second butt joint gradually decreases; and / or The cross-sectional area of ​​the flexible connecting pipe remains unchanged.

9. The burner head according to any one of claims 1 to 8, characterized in that: An inner ring gas mixing chamber (111) and an outer ring gas mixing chamber (112) are provided in the main body (11); two first butt joint tubes are provided, namely a first inner butt joint tube (12a) and a first outer butt joint tube (12b); the first inner butt joint tube (12a) is communicated with the inner ring gas mixing chamber (111), and the first outer butt joint tube (12b) is communicated with the outer ring gas mixing chamber (112); The nozzle connection seat (30) is provided with two second butt joint tubes, which are respectively a second inner butt joint tube (31a) and a second outer butt joint tube (31b); The flexible connecting tubes are provided with two, namely an inner flexible connecting tube (20a) and an outer flexible connecting tube (20b), wherein the inner flexible connecting tube (20a) connects the first inner butt-jointing tube (12a) and the second inner butt-jointing tube (31a), and the outer flexible connecting tube (20b) connects the first outer butt-jointing tube (12b) and the second outer butt-jointing tube (31b).

10. The burner head according to claim 9, characterized in that: At the corresponding position, the cross-sectional area of ​​the first outer butt joint tube (12b) is greater than the cross-sectional area of ​​the first inner butt joint tube (12a); and / or At the corresponding position, the cross-sectional area of ​​the second outer butt joint tube (31b) is greater than the cross-sectional area of ​​the second inner butt joint tube (31a); and / or The cross-sectional area of ​​the outer flexible connecting tube (20b) is greater than the cross-sectional area of ​​the inner flexible connecting tube (20a).

11. A burner, characterized in that: It comprises a nozzle, a fire cover and the burner head according to any one of claims 1 to 10, wherein the nozzle is connected to the nozzle connecting seat (30), and the fire cover is installed on the main body (11).

12. A gas stove, characterized in that: It comprises an air supply unit and the burner according to claim 11, wherein the air supply unit is connected to an external air source and the nozzle respectively.

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