Combustor

Abstract

The utility model provides a burner which comprises a nozzle, an air flap and an injection pipe, the air flap is arranged on the nozzle, a limiting structure is arranged on the end face, facing the nozzle, of the injection pipe, the limiting structure protrudes outwards in the direction perpendicular to the end face, the side face of the limiting structure abuts against the peripheral wall of an air flap hole in the air flap, and the side face of the limiting structure abuts against the peripheral wall of the air flap hole in the injection pipe. And the radial movement freedom degree of the nozzle relative to the injection pipe is limited. The side face, provided with the limiting structure, of the end face, facing the nozzle, of the injection pipe abuts against the peripheral wall of the air door hole of the air door sheet, so that the radial movement freedom degree of the air door sheet relative to the nozzle is limited; therefore, the moving freedom degree of the nozzle in the radial direction of the nozzle is further limited, and the coaxiality between the nozzle and the injection pipe is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of stoves, in particular to a burner. Background Art

[0002] At present, the plug-in valve burner is widely used by manufacturers on gas cookers due to its low cost and easy installation. Generally, the nozzle is set on the plug-in valve, and the plug-in valve is connected by plugging the nozzle into the central mounting hole of the ejector to complete the assembly. However, in order to facilitate installation and take into account the manufacturing tolerance of the parts, the central mounting hole of the ejector and the nozzle are gap-assembled, and the single-side gap of the circular hole can reach 1mm. This can easily cause the central axis of the nozzle and the ejector tube to deviate, thereby weakening the one-time ejection ability, resulting in excessive smoke and low combustion efficiency. If the assembly gap is reduced by reducing the diameter of the central mounting hole, an interference fit may be formed between some nozzles and the ejector tube due to the existence of manufacturing tolerances. Since the material of the nozzle is relatively hard, the assembly of the nozzle and the ejector tube is extremely difficult in the case of interference fit, or even impossible to assemble, which greatly reduces the assembly efficiency of the assembly line. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a burner in order to overcome the defect in the prior art that the nozzle is easily offset from the central axis of the ejector tube.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] A burner comprises a nozzle, an air flap and an ejector tube, wherein the air flap is arranged on the nozzle, and a limiting structure is provided on the end face of the ejector tube facing the nozzle, the limiting structure protrudes outward in a direction perpendicular to the end face, and the side surface of the limiting structure abuts against the peripheral wall of the air flap hole on the air flap to limit the radial movement freedom of the nozzle relative to the ejector tube.

[0006] The side surface of the limiting structure is arranged on the end surface of the ejector tube facing the nozzle so as to abut against the peripheral wall of the air flap hole of the air flap to limit the radial movement freedom of the air flap relative to the nozzle. Since the air flap is arranged on the nozzle, the air flap has a radial limiting effect on the nozzle, thereby further limiting the radial movement freedom of the nozzle and ensuring the coaxiality between the nozzle and the ejector tube.

[0007] Compared with the prior art solution of limiting the size between the outer wall of the nozzle and the nozzle mounting hole of the ejector tube to ensure the coaxiality between the nozzle and the ejector tube, the positioning through the air flap and the ejector tube utilizes the fact that the air flap has better deformation ability than the nozzle. When there is a manufacturing tolerance in the air flap or the ejector tube, which causes an interference fit between the air flap and the limiting structure, the deformation ability of the air flap makes it easier to assemble the air flap with the limiting structure. This technical solution of indirectly limiting the nozzle through the air flap reduces the assembly difficulty of the burner while ensuring the coaxiality between the nozzle and the ejector tube, thereby improving the assembly efficiency of the assembly line.

[0008] Preferably, a projection of the limiting structure on the surface of the air flap is tangent to a peripheral wall of the air flap hole on the air flap.

[0009] By arranging the limiting structure to be tangent to the air flap, the air flap can rotate more smoothly.

[0010] Preferably, a projection of the limiting structure on the surface of the air flap is tangent to an inner peripheral wall of the air flap hole on the air flap.

[0011] After the limiting structure is set, the air flap hole on the air flap should be adaptively enlarged to accommodate the limiting structure. Compared with setting the limiting structure so that its projection on the air flap surface is tangent to the outer peripheral wall of the air flap hole, by setting the limiting structure so that its projection on the air flap surface is tangent to the inner peripheral wall of the air flap hole, it is possible to avoid the air flap hole on the air flap from expanding radially outward, thereby reducing the structural strength of the air flap.

[0012] Preferably, the ejector pipe has at least one limiting structure abutting against the lower right corner of the inner peripheral wall of the air flap.

[0013] By arranging a limiting structure on the ejector tube to abut against the lower right corner of the air flap, the air flap and the nozzle are prevented from deviating toward the lower right corner, thereby minimizing the negative impact caused by the non-coaxiality of the nozzle and the ejector tube.

[0014] Preferably, the ejector tube further comprises a nozzle mounting hole, the nozzle is connected to the ejector tube via the nozzle mounting hole, the ejector tube has at least two limiting structures, and the at least two limiting structures are evenly distributed on the end surface of the ejector tube facing the nozzle.

[0015] By arranging at least two limiting structures on the ejector tube, the air flap is limited in at least two directions, and the evenly distributed limiting structures have a better limiting effect on the air flap.

[0016] Preferably, along the direction of the ejector tube toward the nozzle, the protruding dimension of the limiting structure relative to the end surface of the ejector tube is greater than or equal to the thickness dimension of the air flap.

[0017] By setting the protruding dimension of the limiting structure relative to the end face of the ejector tube in the direction of the ejector tube toward the nozzle to be greater than or equal to the thickness of the air flap, that is, the protruding height of the limiting structure relative to the end face of the ejector tube is greater than or equal to the thickness of the air flap, the limiting structure has a better limiting effect on the air flap, avoiding the limiting structure from losing its function of limiting the air flap due to a large gap between the air flap and the end face of the ejector tube due to improper assembly.

[0018] Preferably, a limiting groove is provided on the nozzle, a limiting ring is embedded in the limiting groove, and the limiting ring protrudes relative to the nozzle in the radial direction of the nozzle; along the direction of the nozzle toward the ejection tube, the air flap and the limiting ring are sequentially mounted on the nozzle.

[0019] A limiting groove is provided on the nozzle, a limiting ring is embedded in the limiting groove, and the limiting ring protrudes relative to the nozzle in the radial direction of the nozzle. The air flap and the limiting ring are sequentially sleeved on the nozzle along the direction of the nozzle toward the ejection tube, thereby preventing the air flap from detaching from the nozzle from the end of the nozzle close to the ejection tube.

[0020] Preferably, a coil spring is sleeved on the nozzle, and along the direction from the nozzle toward the ejector tube, the nozzle, the coil spring, the air flap and the limiting ring are abutted in sequence.

[0021] By sleeved a spring on the nozzle and the nozzle, coil spring, air flap and limit ring abut in sequence along the direction of the nozzle toward the ejection tube, the position of the air flap can be kept unchanged in the axial direction of the nozzle, preventing the air flap from not fitting against the end face of the ejection tube.

[0022] Preferably, it is characterized in that the outer peripheral side of the air flap has a uniformly distributed tooth structure.

[0023] By arranging uniformly distributed tooth structures on the outer peripheral wall of the air flap, it is convenient to move the air flap.

[0024] Preferably, the burner further comprises a plug-in valve, and the plug-in valve is threadedly connected to the nozzle.

[0025] By using a threaded connection between the plug-in valve and the nozzle, the connection effect between the nozzle and the plug-in valve is better.

[0026] The positive progress effect of the utility model is that: by setting the side of the limiting structure on the end face of the ejector tube facing the nozzle and abutting against the peripheral wall of the air flap hole of the air flap, the radial movement freedom of the air flap relative to the nozzle is limited. Since the air flap is set on the nozzle, the air flap has a radial limiting effect on the nozzle, thereby further limiting the radial movement freedom of the nozzle and ensuring the coaxiality between the nozzle and the ejector tube. Compared with the scheme in the prior art that the size between the outer peripheral wall of the nozzle and the nozzle mounting hole of the ejector tube is limited to ensure the coaxiality between the nozzle and the ejector tube, the positioning of the air flap and the ejector tube utilizes the characteristic that the air flap has better deformation ability than the nozzle. When the air flap or the ejector tube has a manufacturing tolerance, the air flap and the limiting structure form an interference fit, and the deformation ability of the air flap makes it easier to assemble the air flap with the limiting structure. This technical solution of indirectly limiting the nozzle by the air flap reduces the assembly difficulty of the burner while ensuring the coaxiality between the nozzle and the ejector tube, and improves the assembly efficiency of the assembly line. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of the burner of Example 1 of the utility model.

[0028] Figure 2 For this utility model Figure 1 A is an enlarged view of the middle image.

[0029] Figure 3 It is a structural schematic diagram of the air flap and the ejector of Example 1 of the utility model.

[0030] Figure 4 For this utility model Figure 2 Enlarged view of B.

[0031] Figure 5 It is a schematic structural diagram of the nozzle and the air flap of Example 1 of the utility model.

[0032] Figure 6 This is a schematic diagram of the structure of the ejector of Example 1 of the utility model.

[0033] Figure 7 This is a schematic structural diagram of the air flap and the ejector of Example 2 of the utility model.

[0034] Figure 8 For this utility model Figure 7 Enlarged view of C in the middle.

[0035] Fig. 9 This is a schematic diagram of the structure of the ejector of Example 2 of the utility model.

[0036] Description of reference numerals:

[0037] Ejector tube 1

[0038] Nozzle mounting hole 11

[0039] Air Inlet 12

[0040] End face 13

[0041] Limit structure 2

[0042] Nozzle 3

[0043] Nozzle 31

[0044] Limiting ring 32

[0045] Coil spring 33

[0046] Air flap 4

[0047] Air door hole 41

[0048] Inner wall 42

[0049] Outer wall 43

[0050] Limit handle 44

[0051] Outer side 45

[0052] Direct valve 5 DETAILED DESCRIPTION

[0053] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0054] like Figure 1-Figure 6 As shown, this embodiment provides a burner, which includes a nozzle 3, an air flap 4 and an ejector tube 1. The air flap 4 is arranged on the ejector tube 1. A limiting structure 2 is provided on the end face 13 of the ejector tube 1 facing the nozzle 3. The limiting structure 2 protrudes outward in a direction perpendicular to the end face 13. The side of the limiting structure 2 abuts against the peripheral wall of the air flap hole 41 on the air flap 4 to limit the radial movement freedom of the nozzle 3 relative to the ejector tube 1. By arranging the side of the limiting structure 2 on the end face 13 of the ejector tube 1 facing the nozzle 3 to abut against the peripheral wall of the air flap hole 41 of the air flap 4 to limit the radial movement freedom of the air flap 4 relative to the nozzle 3, since the air flap 4 is arranged on the nozzle 3, the air flap 4 has a radial limiting effect on the nozzle 3, thereby further limiting the radial movement freedom of the nozzle 3 and ensuring the coaxiality between the nozzle 3 and the ejector tube 1.

[0055] Compared with the prior art solution of limiting the size between the outer wall of the nozzle 3 and the nozzle mounting hole 11 of the ejector tube 1 to ensure the coaxiality between the nozzle 3 and the ejector tube 1, the positioning through the air flap 4 and the ejector tube 1 utilizes the characteristic that the air flap 4 has better deformation ability than the nozzle 3. When there is a manufacturing tolerance in the air flap 4 or the ejector tube 1, which causes the air flap 4 to form an interference fit with the limiting structure 2, the deformation ability of the air flap 4 makes it easier to assemble the air flap 4 with the limiting structure 2. This technical solution of indirectly limiting the nozzle 3 through the air flap 4 reduces the assembly difficulty of the burner while ensuring the coaxiality between the nozzle 3 and the ejector tube 1, thereby improving the assembly efficiency of the assembly line.

[0056] Specifically, in this embodiment, if Figure 1 and Figure 2 As shown, the burner includes an ejector, on which two ejector tubes 1 are arranged, one ejector tube 1 is plugged into a corresponding nozzle 3, and each nozzle 3 is provided with an air flap 4. Figure 6 As shown, the ejector tube 1 includes a nozzle mounting hole 11 located at its axis and an end surface 13 facing the nozzle 3. Two air inlets 12 are arranged on the end surface 13. The two air inlets 12 are symmetrically arranged. Figure 3 and Figure 4As shown, two air flap holes 41 are arranged symmetrically, and the central angle of each air flap hole 41 is 120°. When the air flap 4 is turned clockwise, the opening of the air flap 4 will decrease. The limiting structure 2 is arranged on the end surface 13 inside the air inlet 12 of the ejector tube 1, and the side surface of the limiting structure 2 abuts against the inner peripheral wall 42 of the air flap hole 41 on the air flap 4. Further, the air flap includes the inner peripheral wall 42 of the air flap hole and the outer peripheral wall 43 of the air flap hole. In this embodiment, the projection of the limiting structure 2 on the surface of the air flap 4 is tangent to the inner peripheral wall 42 of the air flap hole 41. When the air flap 4 is turned, the projection of the limiting structure 2 on the surface of the air flap 4 is always tangent to the inner peripheral wall 42 of the air flap hole 41. By setting the limiting structure 2 to be tangent to the air flap 4, when there is no manufacturing tolerance between the air flap 4 and the ejection tube 1, the limiting structure 2 can just abut against the inner peripheral wall 42 of the air flap hole 41, and the limiting structure 2 does not affect the rotation of the air flap 4, so that the air flap 4 rotates more smoothly. When the manufacturing tolerance of the air flap 4 or the ejection tube 1 causes an interference fit between the inner peripheral wall 42 of the air flap 4 and the limiting structure 2, the inner peripheral wall 42 of the air flap 4 and the limiting structure 2 will not be too tight to prevent smooth rotation. In the prior art, the air flap 4 does not completely cover the end face 13 on the inner side of the air inlet 12 of the ejector tube 1, but completely shields the end face 13 on the outer side of the air inlet 12 of the ejector tube 1. Therefore, the limiting structure 2 is set so that its projection on the surface of the air flap 4 is tangent to the inner peripheral wall 42 of the air flap hole 41. The limiting structure 2 can be directly set at an uncovered position on the end face 13 on the inner side of the air inlet 12. However, if the limiting structure 2 is to be set on the end face 13 on the outer side of the air inlet 12, it is necessary to expand the area of ​​the air flap hole 41 on the air flap 4 radially outward to expose the end face 13. The solution of expanding the area of ​​the air flap hole 41 on the air flap 4 radially outward will reduce the area between the outer peripheral side 45 of the air flap 4 and the outer peripheral wall 43 of the air flap hole 41, thereby reducing the strength of the air flap.

[0057] Furthermore, if it is necessary to reduce the number of limiting structures 2 provided on the ejection tube 1 and reduce the number of limiting structures 2 to one, a limiting structure 2 for contacting with the lower right corner of the inner peripheral wall 42 of the air flap 4 should be provided. The lower right corner here refers to the position where the limiting structure 2 is provided at the lower right corner of the inner peripheral wall 42 of the air flap 4 from the perspective of the direction from the nozzle 3 toward the ejection tube 1 (for details, refer to Figure 4 and Figure 6), such a preferred position arrangement scheme is obtained through experimental tests and related theoretical calculations. Specifically, when the nozzle 3 is coaxially assembled with the ejector tube 1, if the entire burner is used in the northern hemisphere, due to the influence of the earth's rotation, the gas may tilt to the right in the ejector tube 1 after being ejected from the nozzle 3. Therefore, when the eccentric direction of the nozzle 3 is to the right, the eccentricity of the gas will be aggravated. After the gas enters the ejector tube 1 through the nozzle 3, it needs to be transported upward to the gas chamber for combustion. Therefore, when the nozzle 3 is eccentric downward, it is not conducive to the transportation of the gas. Therefore, at least one limiting structure 2 must be set in the lower right corner to completely prevent the nozzle 3 from deviating to the right and downward. The limiting structure 2 at this angle can minimize the negative impact caused by the nozzle 3 and the ejector tube 1 not being coaxial.

[0058] In this embodiment, since the limiting structure 2 is arranged on the end surface 13 on the inner side of the air inlet 12, when it is necessary to limit the air flap 4 and the nozzle 3 from moving to the lower right corner, the limiting structure 2 needs to be set at the lower right corner. In other embodiments, when the limiting structure 2 is arranged on the end surface 13 on the outer side of the air inlet 12, the limiting structure 2 abuts against the outer peripheral wall 43 of the air flap hole 41. At this time, in order to limit the air flap 4 and the nozzle 3 from deviating to the lower right corner, the limiting structure 2 should be adaptively adjusted to be set at the upper left corner.

[0059] In the present embodiment, along the direction of the nozzle 3 toward the ejector tube 1, the protruding dimension of the limiting structure 2 relative to the end face 13 of the ejector tube 1 is greater than the thickness dimension of the air flap 4, that is, the protruding height of the limiting structure 2 relative to the end face 13 is greater than the thickness dimension of the air flap 4. Specifically, the height dimension of the limiting structure 2 is 2 mm larger than the thickness dimension of the air flap 4. This is done to ensure that the air flap 4 can still abut against the side surface of the limiting structure 2 when it is not in close contact with the end face 13 of the ejector tube 1, so as to prevent the limiting structure 2 from losing the function of limiting the air flap 4 when the air flap 4 is not in close contact with the end face 13 of the ejector tube 1 due to improper assembly.

[0060] Of course, in other embodiments, it is also possible that the height of the limiting structure 2 protruding relative to the end face 13 is equal to the thickness of the air flap 4. However, since the air flaps are generally thin, the assembly requirements for the air flap 4 are relatively high in this case. The air flap 4 must be close to the end face 13 of the ejector tube 1 to ensure that the side of the limiting structure 2 can abut against the air flap 4.

[0061] like Figure 5 As shown, in this embodiment, a limiting groove is further provided on the nozzle 3, a limiting ring 32 is provided and embedded in the limiting groove, the limiting ring 32 protrudes relative to the nozzle 3 along the radial direction of the nozzle 3, and the air flap 4 and the limiting ring 32 are sequentially sleeved on the nozzle 3 along the direction of the nozzle 3 toward the ejection tube 1. By providing the limiting groove and the limiting ring 32 on the nozzle 3, it is possible to prevent the air flap 4 from being separated from the nozzle 3 from the end of the nozzle 3 close to the ejection tube 1.

[0062] In this embodiment, the air flap 4 is sleeved on the nozzle 3, so that the assembly is relatively simple. In other embodiments, the air flap 4 can also be welded to the nozzle 3, or directly formed into one piece with the nozzle 3.

[0063] Specifically, a coil spring 33 is also sleeved on the nozzle 3. Along the direction of the nozzle 3 toward the ejection tube 1, the nozzle 3, the coil spring 33, the air flap 4 and the limiting ring 32 are abutted in sequence. The two surfaces of the air flap 4 are abutted by the coil spring 33 and the limiting ring 32 to ensure that the position of the air flap 4 remains unchanged in the axial direction of the nozzle 3, thereby preventing the air flap 4 from not fitting against the end face 13 of the ejection tube 1.

[0064] Furthermore, the distance between the limiting ring 32 and the end of the nozzle 3 where the nozzle outlet 31 is located is 3 mm, retaining the plug-in distance between the nozzle 3 and the ejector tube 1. Of course, in other embodiments, the distance reserved for the nozzle to be plugged in with the ejector tube can also be adaptively lengthened or shortened according to actual needs.

[0065] In this embodiment, the outer peripheral side 45 of the air flap 4 has a uniformly distributed tooth structure. By providing the uniformly distributed tooth structure, it is convenient to move the air flap 4 to change the primary air intake volume of the ejector tube 1. A limit handle 44 is also provided on the air flap 4 to limit the rotation angle of the air flap 4. The maximum rotation angle of the air flap 4 is 120° corresponding to the central angle of the air flap hole 41.

[0066] In this embodiment, the burner further includes a plug-in valve 5, and after the nozzle 3 and the plug-in valve 5 are connected by threads, the nozzle 3 is plugged into the ejector tube 1. By using a threaded connection between the nozzle 3 and the plug-in valve 5, the connection effect between the nozzle 3 and the plug-in valve 5 is better and not easy to loosen.

[0067] Example 2

[0068] This embodiment further provides a burner, the structure of which is substantially the same as that of the burner provided in Embodiment 1, except that: in this embodiment, two limiting structures 2 are provided on each ejector tube 1.

[0069] Specifically, if Figure 7-Figure 9 As shown, in this embodiment, the ejector tube 1 has two limiting structures 2, which are evenly distributed on the end surface 13 of the ejector tube 1 facing the nozzle 3, and each limiting structure 2 is tangent to the inner peripheral wall 42 of the air door hole 41. By providing two limiting structures 2 on the ejector tube 1, the air flap 4 is limited in at least two directions, and the evenly distributed limiting structures 2 have a better limiting effect on the air flap 4.

[0070] In other embodiments, the number of the limiting structures 2 on each ejector tube 1 may be three or more, and the limiting structures 2 are evenly arranged on the ejector tube, and the side surface of each limiting structure 2 is tangent to the inner peripheral wall 42 of the damper hole 1.

[0071] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A burner, comprising a nozzle, an air flap and an ejector pipe, characterized in that: The air flap is arranged on the nozzle, and has a limiting structure on the end face of the ejector tube facing the nozzle. The limiting structure protrudes outward in a direction perpendicular to the end face, and the side face of the limiting structure abuts against the peripheral wall of the air flap hole on the air flap to limit the radial movement freedom of the nozzle relative to the ejector tube.

2. The burner according to claim 1, characterized in that The projection of the limiting structure on the surface of the air flap is tangent to the peripheral wall of the air flap hole on the air flap.

3. The burner according to claim 2, characterized in that The projection of the limiting structure on the surface of the air flap is tangent to the inner peripheral wall of the air flap hole on the air flap.

4. The burner according to claim 3, characterized in that The ejector tube has at least one limiting structure abutting against the lower right corner of the inner peripheral wall of the air flap.

5. The burner according to claim 1, characterized in that The ejector tube further comprises a nozzle mounting hole, the nozzle is connected to the ejector tube via the nozzle mounting hole, the ejector tube is provided with at least two limiting structures, and the at least two limiting structures are evenly distributed on the end surface of the ejector tube facing the nozzle.

6. The burner according to claim 1, characterized in that Along the direction from the ejector tube toward the nozzle, the protruding dimension of the limiting structure relative to the end surface of the ejector tube is greater than or equal to the thickness dimension of the air flap.

7. The burner according to any one of claims 1 to 6, characterized in that: A limiting groove is provided on the nozzle, a limiting ring is embedded in the limiting groove, and the limiting ring protrudes relative to the nozzle in the radial direction of the nozzle; along the direction from the nozzle to the ejection tube, the air flap and the limiting ring are sequentially sleeved on the nozzle.

8. The burner according to claim 7, characterized in that A coil spring is sleeved on the nozzle, and along the direction from the nozzle toward the ejection tube, the nozzle, the coil spring, the air flap and the limiting ring are abutted in sequence.

9. The burner according to any one of claims 1 to 6, characterized in that: The outer peripheral side of the air flap has a uniformly distributed tooth structure.

10. The burner according to any one of claims 1 to 6, characterized in that: The burner further comprises a plug-in valve, and the plug-in valve is threadedly connected to the nozzle.

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