Inner ring fire cover and combustor
By designing an inner ring flame cap with a staggered auxiliary flame hole section and a limiting structure, the problems of poor flame stability and difficult mold processing in the existing technology have been solved, achieving higher flame stability and processing accuracy.
Patent Information
- Application Number
- CN202520055157.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-10
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-01-10
AI Technical Summary
In existing technologies, the inner ring flame cap improves flame stabilization performance by increasing the depth of the flame holes, but this leads to problems such as the outer ring flame cap being burned and discolored, and increased difficulty in mold processing.
Design an inner ring burner cap, including an upper burner cap and a lower burner cap. By setting a staggered auxiliary burner hole section and a limiting structure between the upper and lower burner caps, the depth of the auxiliary burner hole is increased, the width requirement of the burner cap is reduced, secondary air supply is ensured, and the gas flow rate is reduced by a throttling plate. The air inlet height of the main burner hole and the auxiliary burner hole are set independently.
It improves the flame stabilization performance of the inner ring flame cap, avoids the outer ring flame cap from being burned and discolored, and reduces the difficulty of mold processing, thus achieving a higher flame stabilization effect and processing precision.
Smart Images
Figure CN223726349U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of the range, in particular to an inner ring fire cover and combustor. BACKGROUND
[0002] The inner ring fire cover of split type slot type fire hole in prior art has poor flame stability, and flame separation is prone to occur under cold state and high pressure working condition. In order to improve the flame stability effect, the method usually adopted is to increase the depth of fire hole, thereby improving the fire hole resistance and reducing the gas flow rate. However, increasing the depth of fire hole is easy to cause the distance between the inner ring fire cover and the outer ring fire cover to be too close, which is not conducive to secondary air supplement, resulting in yellow fire, smoke gas over and other problems, and the inner side of the outer ring fire cover is also easy to be burned and discolored by the flame generated by the inner ring fire cover. In addition, increasing the depth of fire hole will also lead to the wall thickness between adjacent fire holes being too small, resulting in increased difficulty in mold processing. SUMMARY
[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art inner ring fire cover that affects secondary air supplement by increasing the depth of fire hole to improve the flame stability performance, is easy to cause the outer ring fire cover to be burned and discolored, and is not conducive to production and processing, and to provide an inner ring fire cover and combustor.
[0004] The utility model solves the above technical problems through the following technical scheme:
[0005] The utility model provides an inner ring fire cover, the inner ring fire cover includes lower fire cover and upper fire cover, the upper fire cover can be detachably covered on the lower fire cover to form a plurality of main fire holes, auxiliary fire holes and central cavity, the main fire hole and the auxiliary fire hole are communicated with the central cavity and the outside world.
[0006] The auxiliary fire hole includes first hole section and second hole section, the first hole section and the second hole section are mutually staggered and communicated, the bottom surface of the upper fire cover is equipped with first recess, the first recess and the top surface of the lower fire cover form the first hole section, the top surface of the lower fire cover is equipped with second recess, the second recess and the bottom surface of the upper fire cover form the second hole section.
[0007] In the scheme, the auxiliary fire hole includes a first hole section and a second hole section, the first hole section and the second hole section are mutually staggered and communicated, thereby prolonging the fire hole depth of the auxiliary fire hole, increasing the air outlet resistance of the auxiliary fire hole, improving the flame stabilization performance, without increasing the width of the fire cover in the radial direction, avoiding the distance between the inner ring fire cover and the outer ring fire cover being too close, being beneficial to secondary air supplement, and avoiding problems such as yellow flame and smoke gas exceeding.
[0008] Preferably, the bottom surface of the upper fire cover is provided with a limiting groove, and the top surface of the lower fire cover is provided with a limiting protrusion, the limiting protrusion is inserted into the limiting groove to limit the radial displacement of the upper fire cover and the lower fire cover.
[0009] In the scheme, the bottom surface of the upper fire cover is provided with a limiting groove, and the top surface of the lower fire cover is provided with a limiting protrusion, the limiting protrusion is inserted into the limiting groove to limit the radial displacement of the upper fire cover and the lower fire cover.
[0010] Preferably, the limiting groove is provided with a first radial limiting surface, and the limiting protrusion is provided with a second radial limiting surface, the first radial limiting surface and the second radial limiting surface are attached, and the first radial limiting surface and the second radial limiting surface extend along the vertical direction.
[0011] In the scheme, the limiting groove and the limiting protrusion are respectively provided with a first radial limiting surface and a second radial limiting surface, the first radial limiting surface and the second radial limiting surface are attached, and the first radial limiting surface and the second radial limiting surface are arranged to extend along the vertical direction, thereby more effectively limiting the radial displacement of the upper fire cover and the lower fire cover, and further improving the flame stabilization performance of the inner ring fire cover.
[0012] Preferably, the auxiliary fire hole further includes a third hole section, the third hole section communicates the first hole section and the second hole section, and the third hole section extends along the vertical direction.
[0013] In the scheme, the first hole section and the second hole section are communicated through the third hole section, the third hole section is located at the attachment position of the first radial limiting surface and the second radial limiting surface, and the first radial limiting surface and the second radial limiting surface constitute part of the third hole section, therefore the extension directions of the third hole section, the first radial limiting surface and the second radial limiting surface are consistent, all extending along the vertical direction, thereby further prolonging the fire hole depth of the auxiliary fire hole, increasing the air outlet resistance of the auxiliary fire hole, and further improving the flame stabilization performance.
[0014] Preferably, the main fire hole comprises a main air inlet, and the auxiliary fire hole comprises an auxiliary air inlet, the main air inlet and the auxiliary air inlet being located at different heights in the vertical direction.
[0015] In this scheme, by locating the main air inlet and the auxiliary air inlet at different heights in the vertical direction, the mutual influence of the main fire hole and the auxiliary fire hole at the air inlet position is reduced, the air supply of the air inlet is more sufficient, the air supply circuits of the main fire hole and the auxiliary fire hole are relatively independent, and the failure of air flow diversion to the auxiliary fire hole due to small resistance of the main fire hole at high pressure is avoided, thereby further improving the flame stabilizing effect.
[0016] Preferably, the inner ring fire cover further comprises a throttle plate, the throttle plate being arranged in the lower fire cover, a first opening being arranged in the middle of the throttle plate, and a plurality of second openings being arranged in the circumferential direction of the throttle plate, the first opening and the second openings being used for connecting the mixing chamber and the central cavity.
[0017] In this scheme, the throttle plate is arranged in the lower fire cover, the first opening is arranged in the middle of the throttle plate, and the plurality of second openings are arranged in the circumferential direction of the throttle plate, the first opening and the second openings being used for connecting the mixing chamber and the central cavity, the air flow flows from the base through the mixing chamber and then flows into the central cavity, and finally flows out of the combustion through the fire hole, by arranging the throttle plate, the path of the air flow in the mixing chamber to the fire hole is lengthened, the flow rate of the gas is reduced, the effect of reducing the speed and slowing down the flow is achieved, and the flame stabilizing effect is further improved.
[0018] Preferably, in the radial direction of the inner ring fire cover, the second opening is aligned with the auxiliary air inlet.
[0019] In this scheme, by aligning the second opening with the auxiliary air inlet in the radial direction of the inner ring fire cover, the gas flowing from the second opening is more easily introduced into the auxiliary fire hole, the air inlet of the auxiliary fire hole is ensured, and the flame stabilizing effect of the inner ring fire cover is better.
[0020] Preferably, the main fire hole and the auxiliary fire hole are arranged at intervals in the circumferential direction of the inner ring fire cover, the main fire hole further comprises a main air outlet, the auxiliary fire hole further comprises an auxiliary air outlet, and the height of the auxiliary air outlet is lower than the height of the main air outlet.
[0021] In this scheme, by arranging the main fire hole and the auxiliary fire hole at intervals in the circumferential direction of the inner ring fire cover, and arranging the height of the auxiliary air outlet to be lower than that of the main air outlet, the auxiliary fire hole can form a pulling force on the root flame of the main fire hole, and the flame stabilizing performance is further improved.
[0022] Preferably, the angle between the main fire hole and the horizontal plane is θ1, the angle between the auxiliary fire hole and the horizontal plane is θ2, and 0.5θ1≤θ2≤θ1.
[0023] In the scheme, the angle between the main fire hole and the horizontal plane is θ1, and the angle between the auxiliary fire hole and the horizontal plane is θ2, by 0.5θ1≤θ2≤θ1, so that the flame of the auxiliary gas outlet can effectively act on the root of the flame of the main gas outlet, and better flame stabilization effect is achieved.If θ2<0.5θ1, the flame of the auxiliary fire hole intersects with the root of the flame of the main fire hole too little, and the flame stabilization effect is not good;if θ1<θ2, the flame of the auxiliary fire hole also acts on the root of the flame of the main fire hole too little, which affects the flame stabilization effect.
[0024] The utility model discloses still provide a kind of combustor, it includes the inner ring fire cover described.
[0025] The utility model has the positive progress effect in that:
[0026] The utility model provides a kind of inner ring fire cover, inner ring fire cover includes lower fire cover and upper fire cover, upper fire cover is detachably covered in lower fire cover to form multiple main fire hole, auxiliary fire hole and central cavity, and main fire hole and auxiliary fire hole communicate central cavity and outside.Auxiliary fire hole includes first hole section and second hole section, and first hole section and second hole section are mutually staggered and communicate, to extend the fire hole depth of auxiliary fire hole, so that the air resistance of auxiliary fire hole increases, improves flame stabilization performance, without increasing the width of fire cover in radial direction, avoid the distance between inner ring fire cover and outer ring fire cover too close, be favorable to secondary air supplement, avoid generating yellow fire, flue gas over and other problems.The first groove and the top surface of lower fire cover form first hole section, and the second groove and the bottom surface of upper fire cover form second hole section, that is to say, utilize upper fire cover and lower fire cover to form a section hole section respectively, avoid the wall thickness between adjacent fire hole too small, mould processing is more convenient, and the requirement of processing precision is reduced, more conducive to product processing production. BRIEF DESCRIPTION OF DRAWINGS
[0027] Figure 1 It is the three-dimensional structure schematic view of inner ring fire cover according to the embodiment 1 of the utility model.
[0028] Figure 2 It is the explosion drawing of inner ring fire cover according to the embodiment 1 of the utility model.
[0029] Figure 3 It is the auxiliary fire hole position section view of inner ring fire cover according to the embodiment 1 of the utility model.
[0030] Figure 4 It is the main fire hole position section view of inner ring fire cover according to the embodiment 1 of the utility model.
[0031] Figure 5 It is the three-dimensional structure schematic view of upper fire cover according to the embodiment 1 of the utility model.
[0032] Figure 6It is a three-dimensional structure schematic view of the lower fire cover according to the embodiment 1 of the utility model.
[0033] Figure 7 It is a three-dimensional structure schematic view of the inner ring fire cover according to the embodiment 2 of the utility model.
[0034] Mark explanation:
[0035] Inner ring fire cover 100
[0036] Upper fire cover 200
[0037] First recess 210
[0038] Limiting recess 220
[0039] First radial limiting surface 221
[0040] Lower fire cover 300
[0041] Second recess 310
[0042] Limiting protrusion 320
[0043] Second radial limiting surface 321
[0044] Main fire hole 400
[0045] Main air inlet 410
[0046] Main air outlet 420
[0047] Auxiliary fire hole 500
[0048] First hole section 510
[0049] Second hole section 520
[0050] Third hole section 530
[0051] Auxiliary air inlet 540
[0052] Auxiliary air outlet 550
[0053] Center cavity 600
[0054] Throttle piece 700
[0055] First opening 710
[0056] Second opening 720
[0057] Stable flame hole 800 Specific implementation
[0058] The utility model will be further explained by way of embodiment below, but will not limit the utility model in the following embodiment range because of this.
[0059] Embodiment 1
[0060] As shown in the drawings, the embodiment provides a burner, which comprises an inner ring fire cover 100. Figures 1-6
[0061] The inner ring fire cover 100 comprises a lower fire cover 300 and an upper fire cover 200, the upper fire cover 200 is detachably capped on the lower fire cover 300 to form a plurality of main fire holes 400, auxiliary fire holes 500 and a central cavity 600, the main fire holes 400 and the auxiliary fire holes 500 communicate with the central cavity 600 and the outside.
[0062] The auxiliary fire hole 500 comprises a first hole section 510 and a second hole section 520, the first hole section 510 and the second hole section 520 are mutually staggered and communicated, thereby prolonging the fire hole depth of the auxiliary fire hole 500, increasing the air outlet resistance of the auxiliary fire hole 500, and improving the flame stability performance, without increasing the width of the fire cover in the radial direction, avoiding the distance between the inner ring fire cover 100 and the outer ring fire cover being too close, being conducive to secondary air supplement, and avoiding problems such as yellow flame and smoke.
[0063] The bottom surface of the upper fire cover 200 is provided with a first recess 210, the first recess 210 and the top surface of the lower fire cover 300 form the first hole section 510, the top surface of the lower fire cover 300 is provided with a second recess 310, the second recess 310 and the bottom surface of the upper fire cover 200 form the second hole section 520, that is, one hole section is formed by the upper fire cover 200 and the lower fire cover 300 respectively, avoiding the wall thickness between adjacent fire holes being too small, the mold processing is more convenient, the requirement for processing precision is reduced, and the product processing and production are more conducive.
[0064] The bottom surface of the upper fire cover 200 is provided with a limiting recess 220, the top surface of the lower fire cover 300 is provided with a limiting protrusion 320, the limiting protrusion 320 is inserted into the limiting recess 220 to limit the radial displacement of the upper fire cover 200 and the lower fire cover 300, avoiding the radial displacement between the upper fire cover 200 and the lower fire cover 300 leading to unstable flame and flame separation phenomenon.
[0065] The limiting recess 220 is provided with a first radial limiting surface 221, the limiting protrusion 320 is provided with a second radial limiting surface 321, the first radial limiting surface 221 and the second radial limiting surface 321 are attached, and the first radial limiting surface 221 and the second radial limiting surface 321 extend along the vertical direction, thereby being able to more effectively limit the radial displacement of the upper fire cover 200 and the lower fire cover 300, and further improving the flame stability performance of the inner ring fire cover 100.
[0066] In the embodiment, the first radial limiting surface 221 and the second radial limiting surface 321 extend along the vertical direction. In other embodiments, the first radial limiting surface 221 and the second radial limiting surface 321 can also extend obliquely, and those skilled in the art can select the extension direction of the first radial limiting surface 221 and the second radial limiting surface 321 according to actual needs.
[0067] The auxiliary fire hole 500 further comprises a third hole section 530, the third hole section 530 being in communication with the first hole section 510 and the second hole section 520, and the third hole section 530 extending along the vertical direction. The first hole section 510 and the second hole section 520 are in communication through the third hole section 530, the third hole section 530 being located at the abutting position of the first radial limiting surface 221 and the second radial limiting surface 321, and the first radial limiting surface 221 and the second radial limiting surface 321 forming part of the third hole section 530. Therefore, the third hole section 530 is consistent with the extension direction of the first radial limiting surface 221 and the second radial limiting surface 321, and all extend along the vertical direction, thereby further prolonging the fire hole depth of the auxiliary fire hole 500, increasing the air outlet resistance of the auxiliary fire hole 500, and further improving the flame stabilization performance.
[0068] In the embodiment, the third hole section 530 extends along the vertical direction. In other embodiments, the third hole section 530 can also extend obliquely, and those skilled in the art can select the extension direction of the third hole section 530 according to actual needs.
[0069] The main fire hole 400 comprises a main air inlet 410, and the auxiliary fire hole 500 comprises an auxiliary air inlet 540. The main air inlet 410 and the auxiliary air inlet 540 are located at different heights in the vertical direction, thereby reducing the mutual influence of the main fire hole 400 and the auxiliary fire hole 500 at the air inlet position, making the air supply of the air inlets more sufficient, making the air supply circuits of the main fire hole 400 and the auxiliary fire hole 500 relatively independent, avoiding the failure of air flow diversion to the auxiliary fire hole 500 due to the small resistance of the main fire hole 400 at high pressure, and further improving the flame stabilization effect.
[0070] The inner ring fire cover 100 further comprises a throttle plate 700, the throttle plate 700 being arranged in the lower fire cover 300. The throttle plate 700 is provided with a first opening 710 in the middle part, and a plurality of second openings 720 are arranged in the circumferential direction of the throttle plate 700. The first opening 710 and the second opening 720 are used to communicate the mixing chamber and the central cavity 600. The air flow passes through the mixing chamber from the base and then flows into the central cavity 600, and finally flows out of the fire hole for combustion. By arranging the throttle plate 700, the path of the air flow in the mixing chamber to the fire hole is lengthened, the gas flow rate is reduced, the effect of reducing speed and slowing down the flow is achieved, and the flame stabilization effect is further improved.
[0071] In the radial direction of the inner ring fire cover 100, the second opening 720 is aligned with the auxiliary air inlet 540, so that the gas flowing from the second opening 720 is more easily introduced into the auxiliary fire hole 500, ensuring the air intake of the auxiliary fire hole 500, and the flame stabilizing effect of the inner ring fire cover 100 is better.
[0072] The main fire hole 400 and the auxiliary fire hole 500 are arranged in the circumferential direction of the inner ring fire cover 100, the main fire hole 400 further comprises a main air outlet 420, and the auxiliary fire hole 500 further comprises an auxiliary air outlet 550, the height of the auxiliary air outlet 550 is lower than the height of the main air outlet 420, so that the auxiliary fire hole 500 can form a pulling force on the root flame of the main fire hole 400, and the flame stabilizing performance is further improved.
[0073] The angle between the main fire hole 400 and the horizontal plane is θ1, the angle between the auxiliary fire hole 500 and the horizontal plane is θ2, and 0.5θ1≤θ2≤θ1. If θ2<0.5θ1, the intersection part of the flame of the auxiliary fire hole 500 and the root flame of the main fire hole 400 is too small, and the flame stabilizing effect is not good. If θ1<θ2, the flame of the auxiliary fire hole 500 acts on the root flame of the main fire hole 400 too little, and the flame stabilizing effect is affected. By 0.5θ1≤θ2≤θ1, the flame of the auxiliary air outlet 550 can effectively act on the root flame of the main air outlet 420, and a better flame stabilizing effect is achieved.
[0074] Embodiment 2
[0075] The structure of the embodiment is basically the same as that of embodiment 1, and the same structure will not be described herein, and the difference is that:
[0076] As shown in Figure 7 , the embodiment further comprises a flame stabilizing hole 800 arranged above the auxiliary fire hole 500, so that the flame stabilizing performance of the inner ring fire cover 100 is further improved.
[0077] In the description of the utility model, it is understood that the orientation or position relationship of the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation of the device or element in normal use, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element must have a specific orientation at any time, and is constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the utility model in this respect.
[0078] Although the specific embodiments of the present application are described above, those skilled in the art should understand that this is only an example, the protection scope of the present application is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present application, but these changes and modifications all fall within the present application.
Claims
1. An inner ring fire cover characterized by, The inner ring fire cover comprises a lower fire cover and an upper fire cover, the upper fire cover is detachably covered on the lower fire cover to form a plurality of main fire holes, auxiliary fire holes and a central cavity, the main fire holes and the auxiliary fire holes communicate with the central cavity and the outside world; The auxiliary fire hole comprises a first hole section and a second hole section, the first hole section and the second hole section are mutually staggered and communicated, the bottom surface of the upper fire cover is provided with a first groove, the first groove and the top surface of the lower fire cover form the first hole section, the top surface of the lower fire cover is provided with a second groove, the second groove and the bottom surface of the upper fire cover form the second hole section.
2. The inner ring flame cap of claim 1 wherein, The bottom surface of the upper fire cover is provided with a limiting groove, the top surface of the lower fire cover is provided with a limiting protrusion, the limiting protrusion is inserted into the limiting groove to limit the radial displacement of the upper fire cover and the lower fire cover.
3. The inner ring flame cap of claim 2 wherein, The limiting groove is provided with a first radial limiting surface, the limiting protrusion is provided with a second radial limiting surface, the first radial limiting surface and the second radial limiting surface are attached, and the first radial limiting surface and the second radial limiting surface extend along the vertical direction.
4. The inner ring flame cap of claim 3 wherein, The auxiliary fire hole further comprises a third hole section, the third hole section communicates the first hole section and the second hole section, and the third hole section extends along the vertical direction.
5. The inner ring flame cap of claim 1 wherein, The main fire hole comprises a main air inlet, the auxiliary fire hole comprises an auxiliary air inlet, and the main air inlet and the auxiliary air inlet are located at different heights in the vertical direction.
6. The inner ring flame cap of claim 5 wherein, The inner ring fire cover further comprises a throttle plate, the throttle plate is arranged in the lower fire cover, a middle part of the throttle plate is provided with a first opening, and a plurality of second openings are arranged in the circumferential direction of the throttle plate, and the first opening and the second openings are used to communicate a mixing chamber and the central cavity.
7. The inner ring flame cap of claim 6 wherein, In the radial direction of the inner ring fire cover, the second openings are aligned with the auxiliary air inlets.
8. The inner ring flame cap of claim 1 wherein, The main fire holes and the auxiliary fire holes are arranged at intervals in the circumferential direction of the inner ring fire cover, the main fire holes further comprise main air outlets, the auxiliary fire holes further comprise auxiliary air outlets, and the height of the auxiliary air outlets is lower than the height of the main air outlets.
9. The inner ring flame cap of claim 1 wherein, The angle between the main fire hole and the horizontal plane is θ1, the angle between the auxiliary fire hole and the horizontal plane is θ2, and 0.5θ1≤θ2≤θ1.
10. A burner characterized by, The inner ring fire cover comprises a lower fire cover and an upper fire cover, the upper fire cover is detachably covered on the lower fire cover to form a plurality of main fire holes, auxiliary fire holes and a central cavity, the main fire holes and the auxiliary fire holes communicate with the central cavity and the outside world; The auxiliary fire hole comprises a first hole section and a second hole section, the first hole section and the second hole section are mutually staggered and communicated, the bottom surface of the upper fire cover is provided with a first groove, the first groove and the top surface of the lower fire cover form the first hole section, the top surface of the lower fire cover is provided with a second groove, the second groove and the bottom surface of the upper fire cover form the second hole section. The bottom surface of the upper fire cover is provided with a limiting groove, the top surface of the lower fire cover is provided with a limiting protrusion, the limiting protrusion is inserted into the limiting groove to limit the radial displacement of the upper fire cover and the lower fire cover. The limiting groove is provided with a first radial limiting surface, the limiting protrusion is provided with a second radial limiting surface, the first radial limiting surface and the second radial limiting surface are attached, and the first radial limiting surface and the second radial limiting surface extend along the vertical direction. The auxiliary fire hole further comprises a third hole section, the third hole section communicates the first hole section and the second hole section, and the third hole section extends along the vertical direction. The main fire hole comprises a main air inlet, the auxiliary fire hole comprises an auxiliary air inlet, and the main air inlet and the auxiliary air inlet are located at different heights in the vertical direction. The inner ring fire cover further comprises a throttle plate, the throttle plate is arranged in the lower fire cover, a middle part of the throttle plate is provided with a first opening, and a plurality of second openings are arranged in the circumferential direction of the throttle plate, and the first opening and the second openings are used to communicate a mixing chamber and the central cavity. In the radial direction of the inner ring fire cover, the second openings are aligned with the auxiliary air inlets. The main fire holes and the auxiliary fire holes are arranged at intervals in the circumferential direction of the inner ring fire cover, the main fire holes further comprise main air outlets, the auxiliary fire holes further comprise auxiliary air outlets, and the height of the auxiliary air outlets is lower than the height of the main air outlets. The angle between the main fire hole and the horizontal plane is θ1, the angle between the auxiliary fire hole and the horizontal plane is θ2, and 0.5θ1≤θ2≤θ1. Its inner ring fire cover comprises any one of claims 1-9.