Combustor and gas steam generator provided with same

Abstract

The utility model relates to a burner and a gas steam generator equipped with the burner, the burner comprises an outer shell, a burning plate is arranged in the outer shell, a burning chamber is arranged below the burning plate, the outer shell is fixedly connected with a shell body of the burning chamber through an elastic fastening assembly, and the elastic fastening assembly is fixedly connected with the burning chamber. A guide part for guiding the pressure in the combustion chamber to the shell is arranged in the shell of the combustion chamber, and the elastic fastening assembly is configured to eject the shell to release the pressure when the pressure in the combustion chamber reaches the pressure release pressure and enable the shell to fall back to the initial position after the pressure release. Fixing and pressure relief of the elastic fastening assembly are integrated, the structure is very simple, the manufacturing cost is low, the outer shell can be jacked upwards when the detonation phenomenon occurs due to the fact that the pressure in the combustor rises, an annular pressure relief channel is formed between the outer shell and a shell body of a combustion chamber, and pressure relief is achieved; and greater loss caused by detonation of the combustor is prevented, and harm to a user is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of heating equipment, and particularly relates to a burner and a gas steam generator equipped with the burner. Background Art

[0002] Gas steam generator is a mechanical device that uses the heat energy generated by gas combustion to heat water into hot water or steam. It mainly includes vertical and horizontal types. In the current existing technology, the steam generator is mainly composed of heat exchangers, burners, fans, exhaust pipes and other components. Water and high-temperature flue gas generated by combustion exchange heat in the heat exchanger. After the water is heated, steam is generated and discharged from the steam outlet. The high-temperature flue gas is discharged from the exhaust pipe after cooling.

[0003] In order to solve the above problems, a Chinese patent with patent number 202320713716.0 provides a far-infrared burner and a steam generator equipped with the burner. The steam generator includes a shell, a heat exchanger and a combustion chamber are provided in the shell, and the combustion chamber is installed above the heat exchanger. A burner is installed on the top of the combustion chamber. The burner includes a burner and a premixing chamber, and the combustion chamber is located below the burner.

[0004] In order to solve the problem of equipment damage or gas leakage and explosion caused by deflagration of the top burner, the gas steam generator is provided with a plurality of explosion relief pipes for connecting the combustion chamber with the outside world on the outer shell at the top of the heat exchange chamber. The outer end face of the explosion relief pipe is an upwardly opening inclined hole, and a cover plate that can be opened and closed automatically is sealed and installed on the outer end face of the explosion relief pipe. When a deflagration occurs, the cover plate is ejected, connecting the combustion chamber with the outside atmosphere, and the pressure is released from the explosion relief pipe to protect the burner. After the explosion relief is completed, the cover plate falls back to the state of sealing the explosion relief pipe by gravity or under the elastic force of the torsion spring.

[0005] Although the gas steam generator effectively solves the problem of deflagration and pressure relief by providing an explosion relief pipe, its structure is complex and multiple explosion relief pipes need to be provided, which increases the cost. Utility Model Content

[0006] The main technical problem solved by the utility model is to provide a burner which can relieve the pressure of the burner when deflagration occurs, effectively provide deflagration protection, and has a simple structure and low cost, and at the same time provides a gas steam generator equipped with the burner.

[0007] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is:

[0008] A burner comprises an outer shell, a combustion plate is installed in the outer shell, a combustion chamber is provided below the combustion plate, the outer shell and the shell of the combustion chamber are fixedly connected by an elastic fastening assembly, a guide portion is provided in the shell of the combustion chamber for guiding the pressure in the combustion chamber to the outer shell, the elastic fastening assembly is configured to push open the outer shell to form a pressure relief channel to complete the pressure relief when the pressure in the combustion chamber reaches the pressure relief pressure, and to make the outer shell fall back to the initial position after the pressure relief.

[0009] Furthermore, the elastic fastening assembly includes a screw and a spring, wherein the spring is sleeved on the screw and confined between the screw head and the housing, and the bottom of the screw is connected to the housing of the combustion chamber through threads.

[0010] Furthermore, a plurality of first mounting seats are provided on the top of the shell of the combustion chamber, each of the first mounting seats is provided with an embedded nut, and the bottom of the screw is tightened and fixed with the embedded nut.

[0011] Furthermore, a second mounting seat is provided on the outer shell, the second mounting seat has a mounting inner hole, the bottom of the mounting inner hole has a screw through hole, the spring is installed in the mounting inner hole, and the bottom and top of the spring respectively abut between the bottom of the mounting inner hole and the screw head of the screw.

[0012] Furthermore, the outer shell is composed of an upper cover and a top cover, the top cover is fixedly connected to the top of the upper cover by fasteners, the top cover is provided with a third mounting seat protruding outward, and the upper cover is correspondingly provided with a fourth mounting seat protruding outward, and the third mounting seat and the fourth mounting seat are fixedly connected by fasteners.

[0013] Furthermore, the outer periphery of the upper cover has a two-step structure, and the second mounting seat and the fourth mounting seat are respectively arranged on the two steps and are an integral structure with the upper cover.

[0014] Furthermore, the elastic fastening assembly has an initial elastic force in a normal working state, providing an initial downward pressing force on the housing.

[0015] Further, the guide portion is an annular airflow circulation gap surrounding the combustion plate and the combustion chamber shell.

[0016] Furthermore, the outer periphery of the shell has a downward flange, and in normal working state, the flange is stuck on the outer side of the top of the combustion chamber shell, and the shell and the combustion shell abut each other in both vertical and radial directions.

[0017] Another basic concept of the technical solution adopted in the utility model is:

[0018] A gas steam generator comprises a shell, wherein a heat exchange cavity and a combustion chamber are arranged in the shell, and the burner as described above is installed above the combustion chamber.

[0019] In summary, the burner and the gas steam generator equipped with the burner provided by the utility model have the following advantages compared with the prior art:

[0020] (1) In the present invention, since the outer shell and the shell of the combustion chamber are connected by an elastic fastening assembly, when the pressure in the burner increases and deflagration occurs, the outer shell can be pushed up to form an annular pressure relief channel between the outer shell and the shell of the combustion chamber, thereby timely and effectively relieving the pressure, thereby preventing the burner from causing greater losses when deflagration occurs, and completely solving the problem of deflagration occurring easily due to increased pressure in the combustion chamber, thereby avoiding harm to the user.

[0021] (2) The utility model integrates the fixation and pressure relief of the burner by using an elastic fastening assembly. The structure of the pressure relief control is very simple, the manufacturing cost is low, and it is also convenient to modify the original burner structure.

[0022] (3) The utility model can also use the initial elastic force of the elastic fastening assembly to provide a downward pressing force on the outer shell, which can ensure that the outer shell and the shell of the combustion chamber are in close contact when the burner is working normally, thereby avoiding the heat generated during combustion from being lost and affecting the heating efficiency.

[0023] The specific implementation modes of the present utility model are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation on the present invention. Obviously, the accompanying drawings described below are only some embodiments. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0025] In the attached picture:

[0026] Figure 1 This is a schematic diagram of the structure of the gas steam generator of the utility model;

[0027] Figure 2 This is a cross-sectional view of the burner structure of the utility model;

[0028] Figure 3 It is a partial cross-sectional view of the burner structure of the utility model (working state);

[0029] Figure 4It is a partial cross-sectional view of the burner structure of the utility model (pressure relief state).

[0030] In the figure: shell 1, top cover 11, upper cover 12, flange 121, screw 13, third mounting seat 14, fourth mounting seat 15, combustion plate 2, combustion chamber 3, shell 31, inner shell 311, mounting edge 3111, outer shell 312, first mounting seat 32, embedded nut 33, annular heat exchange cavity 34, steam outlet 35, premixing cavity 4, first premixing cavity 41, second premixing cavity 42, diaphragm 43, air inlet 5, fan 6, elastic fastening assembly 7, screw 71, spring 72, second mounting seat 73, mounting inner hole 74, air flow gap 8, combustion plate mounting frame 9, annular groove 10;

[0031] Generator housing 100 , heat exchange chamber 101 , smoke exhaust pipe 102 , heat exchange pipe 103 , water inlet 104 , and base 105 .

[0032] It should be noted that the drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0034] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Embodiment 1:

[0037] like Figure 1 and Figure 2 As shown, the utility model provides a burner, including a shell 1, a combustion plate 2 is installed in the shell 1, a combustion chamber 3 is below the combustion plate 2, the combustion chamber 3 is surrounded by a shell 31, a premixing chamber 4 is above the combustion plate 2, an air inlet 5 is arranged at the top center of the shell 1, a fan 6 is installed above the air inlet 5, the air outlet end of the fan housing is sealed and fixed at the air inlet 5 by screws and sealing gaskets, and a filter, solenoid valve, etc. (not shown in the figure) are installed on the air inlet side of the fan 6. Under the action of the fan 6, the combustion-supporting air and gas enter the premixing chamber 4 inside the shell 1 through the air inlet 5, the air and gas are mixed in the premixing chamber 4, and the mixed gas passes through the combustion plate 2 and burns on the lower surface of the combustion plate 2. Among them, the combustion plate 2 preferably adopts a ceramic infrared combustion plate.

[0038] In this embodiment, the outer shell 1 of the burner is fixedly connected to the shell 31 of the combustion chamber 3 by multiple groups of elastic fastening components 7. A guide portion is provided in the shell 31 of the combustion chamber 3 for guiding the pressure in the combustion chamber 3 to the outer shell 1. The elastic fastening component 7 is configured to push open the outer shell 1 to release the pressure when the pressure in the combustion chamber 3 reaches the pressure relief pressure and to make the outer shell 1 fall back to the initial position after the pressure relief. The initial position is a position where the outer shell 1 and the shell 31 of the combustion chamber 3 are tightly abutted against each other.

[0039] The structure of fixing the outer shell 1 of the burner and the shell 31 of the combustion chamber 3 by the elastic fastening assembly 4 is adopted. When the pressure in the combustion chamber 3 gradually increases and deflagration occurs, the outer shell 1 of the burner is pushed up under the action of pressure, so that the outer shell 1 of the burner and the shell 31 of the combustion chamber 3 are separated to form an annular pressure relief channel connected to the outside world, thereby completing the pressure relief. In this process, due to the action of the elastic fastening assembly 7, the outer shell 1 and the shell 31 of the combustion chamber 3 are still in a connected state during the pressure relief process, and the elastic force of the elastic fastening assembly 7 increases. After the pressure relief, the pressure in the combustion chamber 3 decreases. Under the elastic force of the elastic fastening assembly 7, the outer shell 1 also automatically falls back to the initial position.

[0040] This structure can relieve pressure in a timely and effective manner when the pressure in the burner increases and deflagration occurs, thereby preventing the burner from causing greater losses when deflagration occurs, and completely solves the problem of deflagration occurring easily due to pressure increase in the combustion chamber 3, thereby avoiding harm to the user. At the same time, the pressure relief control structure of this structure is very simple, the manufacturing cost is low, and it is also convenient to modify the original burner structure.

[0041] like Figure 1 and Figure 2As shown, in this embodiment, the shell 1 of the burner is a hexagonal structure, and a set of elastic fastening components 7 are arranged at each corner, and a set of elastic fastening components 7 are also arranged on each side, so that the shell 1 can be in close contact with the shell 31 in the normal working state, so as to avoid the heat generated during combustion from being lost and affecting the heating efficiency. Of course, the shell 1 of the burner can also adopt other shapes, such as a circle, and multiple sets of elastic fastening components 7 are evenly arranged along the periphery of the circle, and other shapes such as a quadrilateral, a pentagon, etc. can also be adopted.

[0042] like Figure 2 , Figure 3 and Figure 4 As shown, in this embodiment, preferably, the elastic fastening assembly 7 includes a screw 71 and a spring 72, the spring 72 is mounted on the screw 71 and confined between the screw head (not shown in the figure) and the outer shell 1, and the bottom of the screw 41 is fixedly connected to the shell 31 of the combustion chamber 3 by a thread.

[0043] In the present embodiment, it is further preferred that a plurality of first mounting seats 32 are arranged on the top of the shell 31 of the combustion chamber 3, the number of the first mounting seats 32 is consistent with the number of the screws 71, an embedded nut 33 is arranged in each first mounting seat 32, and the bottom of the screw 71 is tightened and fixed to the embedded nut 33 to realize a fixed connection between the outer shell 1 and the shell 31 of the combustion chamber 3.

[0044] In this embodiment, the elastic fastening assembly 7 adopts a structure of a screw 71 and a spring 72, which makes disassembly and assembly simpler and more convenient, and has a lower cost. At the same time, by controlling the initial elastic force of the spring 72, specifically, the spring 72 has an initial deformation compression after the screw 71 is tightened, so that in the normal working state, the spring 72 can provide an initial downward pressing force to the housing 1, so that the housing 1 and the shell 31 of the combustion chamber 3 are closely abutted against each other, avoiding the heat generated during combustion from being lost and affecting the heating efficiency.

[0045] like Figure 3 and Figure 4 As shown, when the pressure in the combustion chamber 3 gradually increases and deflagration occurs, the shell 1 of the burner is lifted up. Since the bottom of the screw 71 is still fixedly connected to the embedded nut 33 on the shell 31, the spring 72 is compressed during the lifting process, and the shell 1 of the burner is separated from the shell 31 of the combustion chamber 3 to form an annular pressure relief channel to complete the pressure relief. After the pressure relief, the pressure in the combustion chamber 3 drops, and the shell 1 will fall back downward under the action of the spring 72 and fall back on the shell 31. Under the initial elastic force of the spring 72, the shell 1 can be tightly abutted against the shell 31. According to the designed pressure relief pressure, select a suitable spring 72.

[0046] like Figure 1 and Figure 2As shown, in this embodiment, a second mounting seat 73 is provided on the housing 1, and the second mounting seat 73 has a mounting inner hole 74, and the bottom of the mounting inner hole 74 has a screw through hole (not shown in the figure), and the spring 72 is installed in the mounting inner hole 74, and the bottom and top of the spring 72 are respectively against the bottom of the mounting inner hole 74 and the screw head of the screw 71, and the inner diameter of the mounting inner hole 74 matches the size of the screw 71 and the spring 72, and the outer diameter of the screw head and the spring 72 is larger than the diameter of the screw through hole at the bottom of the mounting inner hole 74. The second mounting seat 73 can guide, fix and protect the screw 71 and the spring 72.

[0047] In the present embodiment, it is further preferred that the second mounting seat 73 is a cylindrical structure protruding from the outer shell 1 and is integrally formed with the outer shell 1, which is convenient for disassembly and assembly and for controlling the installation accuracy, and can also provide the outer shell 1 with the stroke required for pressure relief during deflagration.

[0048] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in this embodiment, preferably, the housing 1 adopts a split structure, consisting of a top cover 11 and an upper cover 12, the top cover 11 is installed above the upper cover 12, the top cover 11 is disc-shaped, the upper cover 11 is annular, and an air inlet 5 is provided at the center of the top cover 11. The top cover 11 and the upper cover 12 are fixedly connected by fasteners, and the fasteners are preferably screws 13. The top cover 11 and the upper cover 12 can also be fixed by multiple sets of locking components.

[0049] Specifically, the upper cover 12 is provided with a third mounting seat 14 protruding outward, and the top cover 11 is correspondingly provided with a fourth mounting seat 15 protruding outward. The third mounting seat 14 and the fourth mounting seat 15 are fixedly connected by screws 13, so that the top cover 11 and the upper cover 12 are fixedly connected together. The number of the third mounting seats 14 and the fourth mounting seats 15 is consistent with the number of the second mounting seats 73, and they are arranged one by one. The third mounting seat 14 is a cylindrical structure, and the fourth mounting seat 15 is a disc-shaped structure. The third mounting seat 14 has a threaded inner hole, and the fourth mounting seat 15 also has an inner hole. The bottom of the inner hole has a through hole through which the screw 13 passes. The screw 13 is inserted into the inner hole and the lower end passes through the through hole and is threadedly connected to the threaded inner hole of the third mounting seat 14 below.

[0050] In this embodiment, it is further preferred that the upper cover 12 has a two-step structure along the circumferential direction, and the second mounting seat 73 and the third mounting seat 14 are respectively arranged on the two steps, and the second mounting seat 73 and the third mounting seat 14 are integrally formed with the upper cover 12, and more preferably, the second mounting seat 73 and the third mounting seat 14 are connected by an integral connecting portion (not shown in the figure). This structure is easy to manufacture and is also conducive to controlling the installation accuracy.

[0051] In this embodiment, the guide portion is an annular airflow gap 8 around the combustion plate 2 and between the combustion chamber 3 shell 31. The combustion plate 2 is fixed to the upper cover 12 by the combustion plate mounting frame 9. In this embodiment, the burner mounting frame 9 is annular in structure and has a Z-shaped longitudinal section. The horizontal edge at the top is fixedly connected to the upper cover 12 by screws. On the lower surface of the upper cover 12, there is a horizontally matched annular groove 10 at the top of the combustion plate mounting frame 9, and the horizontal edge extending toward the center at the bottom is used to mount the combustion plate 2, which is convenient for the disassembly and assembly of the combustion plate 2 and the daily maintenance of the combustion plate 2. After the combustion plate mounting frame 9 is installed, the annular gap formed between its outer peripheral surface and the shell 31 is the airflow gap 8. The gas in the combustion chamber 3 enters the space below the outer shell 1 through the airflow gap 8. When the pressure reaches a certain level, the outer shell 1 can be lifted upward.

[0052] In this embodiment, the outer periphery of the housing 1 is provided with a downward flange, specifically, a flange 121 is provided on the outer periphery of the upper cover 12. In normal working state, the upper cover 1 is buckled and fixed on the top of the shell 31, and the flange 121 is stuck on the outer side of the top of the combustion chamber shell 31. The housing 1 and the shell 31 are closely abutted against each other in both vertical and radial directions. The height of the flange 121 is about 10 mm to 30 mm.

[0053] like Figure 1 and Figure 2 As shown, in this embodiment, the shell 31 of the combustion chamber 3 has an inner and outer two-layer structure, namely an inner shell 311 and an outer shell 312. An annular heat exchange chamber 34 surrounding the combustion chamber 3 is formed between the inner shell 311 and the outer shell 312. The annular heat exchange chamber 34 is filled with water. A steam outlet 35 is provided on the outer shell 312. After further heat exchange between the water and the high-temperature flue gas in the intermediate combustion chamber 3, the water is discharged from the steam outlet 35.

[0054] The top of the inner shell 311 has an outward horizontal mounting edge 3111, the first mounting seat 32 is arranged on the upper surface of the mounting edge 3111, and the outer periphery of the mounting edge 3111 is welded to the outer shell 312. After the combustion plate mounting frame 9 is installed, the annular gap formed between the outer peripheral surface of the combustion plate mounting frame 9 and the inner shell 311 is the airflow gap 8.

[0055] The premixing chamber 4 above the combustion plate 2 can be as follows Figure 2The double-layer structure shown comprises a first premixing chamber 41 on an upper layer and a second premixing chamber 42 on a lower layer. A transverse partition 43 is installed in the space between the combustion plate 2 and the top cover 11. The transverse partition 43 divides the space between the combustion plate 2 and the air inlet 5 into two upper and lower spaces. The upper space is the first premixing chamber 41 connected to the air inlet 5, and the lower space is the second premixing chamber 42 connected to the combustion plate 2. A plurality of vents (not shown in the figure) for connecting the first premixing chamber 41 with the second premixing chamber 42 are arranged on the transverse partition 43.

[0056] The gas and air enter the first premixing chamber 41 through the air inlet 5, and are premixed for the first time in the first premixing chamber 41, and then enter the second premixing chamber 42 below through multiple air vents, and are premixed for the second time in the second premixing chamber 42. The mixed gas that has been premixed twice enters the combustion plate 2 for combustion, which not only makes the air and gas mixed more fully, but also the mixed gas that has been premixed once enters the second premixing chamber 42 below through multiple air vents, so that the mixed gas is more evenly distributed in the space on the air inlet side of the combustion plate 2. It is particularly suitable for burners with a larger area and is beneficial to improving the combustion efficiency of the burner.

[0057] The premixing chamber 4 above the combustion plate 2 may also adopt only a single-layer structure, and the gas and air directly enter the premixing chamber 4 through the air inlet 5, and after being mixed in the premixing chamber 4, enter the combustion plate 2 for combustion.

[0058] The burner provided by the utility model has the following advantages:

[0059] (1) Since the outer shell and the shell of the combustion chamber are connected by an elastic fastening assembly, when the pressure in the burner increases and deflagration occurs, the outer shell can be pushed up to form an annular pressure relief channel between the outer shell and the shell of the combustion chamber, thereby timely and effectively relieving the pressure, which can prevent the burner from causing greater losses when deflagration occurs, and completely solve the problem of deflagration easily occurring due to increased pressure in the combustion chamber, thereby avoiding harm to users.

[0060] (2) The structure integrates the fixation and pressure relief of the burner by means of an elastic fastening assembly. The structure of the pressure relief control is very simple, the manufacturing cost is low, and it is also convenient to modify the original burner structure.

[0061] (3) The structure can also utilize the initial elastic force of the elastic fastening assembly to provide a downward pressing force on the outer shell, thereby ensuring close contact between the outer shell and the shell of the combustion chamber when the burner is operating normally, thereby preventing the heat generated during combustion from being dissipated and affecting the heating efficiency.

[0062] Embodiment 2:

[0063] like Figure 1 and Figure 2As shown, a gas steam generator is provided in this embodiment, including a generator shell 100, wherein a heat exchange cavity 101 is provided in the generator shell 100, and above the heat exchange cavity 101 is the combustion chamber 3 provided in the first embodiment. The generator shell 100 extends upward as a whole to form an outer shell 312 of the combustion chamber 3 described in the first embodiment, and the heat exchange cavity 101 is connected to the annular heat exchange cavity 34 surrounding the combustion chamber 3, and the burner described in the first embodiment is installed above the combustion chamber 3, and a base 105 is installed below the generator shell 100, and a condenser is installed in the base 105.

[0064] The burner housing 1 and the outer shell 312 of the combustion chamber 3 in the first embodiment are both hexagonal, and the generator housing 100 and the base 105 also adopt the same hexagonal shape. Of course, the burner housing 1, the outer shell 312 of the combustion chamber 3, the generator housing 100 and the base 105 can also adopt a circular shape.

[0065] The generator housing 100 is provided with a water inlet 104, which is arranged at the lower end of the generator housing 100. A smoke exhaust pipe 102 is arranged at a base 105 on one side of the generator housing 100. A plurality of heat exchange pipes 103 are installed in the heat exchange chamber 101. The water inlet 104 is connected to the heat exchange chamber 101. The flow channel in the heat exchange pipe 103 forms a heat exchange air flow channel, and the space outside the heat exchange pipe 103 forms a heat exchange water flow channel. The heat exchange chamber 101 and the annular heat exchange chamber 34 around the combustion chamber 3 are both filled with water. One end of the heat exchange pipe 102 is connected to the combustion chamber 3. The high-temperature flue gas generated by the combustion flows from top to bottom in the heat exchange pipe 102, and heat exchanges with the water flowing from bottom to top in the heat exchange chamber 101. The water evaporates after being heated, and further exchanges heat with the high-temperature flue gas in the combustion chamber 3 in the annular heat exchange chamber 34. The steam finally generated is discharged from the steam outlet 35 at the top, and the flue gas after heat exchange is discharged from the smoke exhaust pipe 102.

[0066] The above is only a preferred embodiment of the present invention, and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents suggested above without departing from the scope of the technical solution of the present invention. The implementation schemes in the above embodiments can be further combined or replaced. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the present invention.

Claims

1. A burner, comprising a housing, a combustion plate installed in the housing, a combustion chamber below the combustion plate, characterized in that: The outer shell is fixedly connected to the shell of the combustion chamber by an elastic fastening assembly. A guide portion is provided in the shell of the combustion chamber for guiding the pressure in the combustion chamber to the outer shell. The elastic fastening assembly is configured to push open the outer shell to form a pressure relief channel to complete the pressure relief when the pressure in the combustion chamber reaches the pressure relief pressure, and to allow the outer shell to fall back to its initial position after the pressure relief.

2. The burner according to claim 1, characterized in that: The elastic fastening assembly comprises a screw and a spring. The spring is sleeved on the screw and restricted between the screw head and the shell. The bottom of the screw is connected to the shell of the combustion chamber through threads.

3. The burner according to claim 2, characterized in that: A plurality of first mounting seats are provided on the top of the shell of the combustion chamber, each of the first mounting seats is provided with an embedded nut, and the bottom of the screw is tightened and fixed with the embedded nut.

4. The burner according to claim 2, characterized in that: A second mounting seat is arranged on the shell, the second mounting seat has a mounting inner hole, the bottom of the mounting inner hole has a screw through hole, the spring is installed in the mounting inner hole, and the bottom and top of the spring respectively abut against the bottom of the mounting inner hole and the screw head of the screw.

5. The burner according to claim 4, characterized in that: The shell is composed of an upper cover and a top cover, the top cover is fixedly connected to the top of the upper cover by fasteners, the top cover is provided with a third mounting seat protruding outward, and the upper cover is correspondingly provided with a fourth mounting seat protruding outward, and the third mounting seat and the fourth mounting seat are fixedly connected by fasteners.

6. The burner according to claim 5, characterized in that: The outer periphery of the upper cover has a two-step structure, and the second mounting seat and the fourth mounting seat are respectively arranged on the two steps and are an integral structure with the upper cover.

7. The burner according to claim 1, characterized in that: The elastic fastening assembly has an initial elastic force in a normal working state, providing an initial downward pressing force to the housing.

8. The burner according to claim 1, characterized in that: The guide portion is an annular airflow flow gap surrounding the combustion plate and between the combustion chamber shell.

9. The burner according to any one of claims 1 to 8, characterized in that: The outer periphery of the shell has a downward flange, and in normal working state, the flange is stuck on the outer side of the top of the combustion chamber shell, and the shell and the combustion shell abut each other in both vertical and radial directions.

10. A gas steam generator, characterized in that: It comprises a shell, in which a heat exchange cavity and a combustion chamber are arranged, and above the combustion chamber a burner as claimed in any one of claims 1 to 9 is installed.

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