A wind cap for a wind distribution plate, a wind distribution plate having the same, and a differential speed bed boiler

Abstract

The present invention discloses a wind cap for a wind distribution plate, which includes an inner tube assembly, an outer cover assembly, and an adjustment assembly. The wind cap described in this case can adjust the opening area of the upper air outlet holes in two modes, thereby adjusting the air outlet efficiency and air pressure. A differential bed boiler described in this case adopts a design of a high-speed bed and a low-speed bed, and the feed inlet is arranged on one side close to the high-speed bed, which is convenient for directly dropping the fuel onto the high-speed bed, avoiding the problem in the prior art that a high-speed bed is sandwiched between two low-speed beds, resulting in the inability of the feed inlet to accurately place the fuel above the high-speed bed in the middle. A differential bed boiler described in this case has the igniter arranged below and on the same side as the high-speed bed, which is convenient for under-bed ignition.

Description

Technical Field

[0001] The present application relates to the field of mechanical technology, and more particularly to an air cap for a wind distribution plate, a wind distribution plate having the same, and a differential bed boiler. Background Art

[0002] In the lower part of the furnace of the differential bed, there are high and low bed surfaces arranged simultaneously, namely a high-speed bed and a low-speed bed. The cross-sectional area of the furnace is large and the rising speed is low. The material circulates repeatedly between the high-speed bed and the low-speed bed for many times, prolonging the residence time of the material in the high-temperature combustion area, providing sufficient time for the moisture and volatile matter of the fuel to be released, burned out, and the desulfurization reaction to occur. The fuel burnout rate is high and the desulfurization rate is high.

[0003] Conventional differential bed boilers have the following problems:

[0004] 1. The air outlet rate and air pressure of the air cap of the wind distribution plate are fixed and non-adjustable.

[0005] 2. The layout position of the high-speed bed. As shown in CN201110224067X, the high-speed bed is arranged in the middle of the furnace, the low-speed bed is arranged in the front and back, and the feed pipes are arranged on both sides of the middle part of the side of the furnace (corresponding to the high-speed bed). Therefore, the number of feed points is small, the feeding uniformity is poor, and the combustion is unstable.

[0006] 3. The ignition position problem. The boiler uses in-bed ignition (generally using diesel as the ignition fuel). The temperature distribution of the bed material is uneven, local overheating is likely to occur, the controllability is poor, the ignition time is long, and the ignition fuel consumption is large. Due to the above two reasons, it is difficult to scale up the structure of the conventional differential bed. Summary of the Invention

[0007] An air cap for a wind distribution plate, comprising:

[0008] An inner tube assembly, including a hollow cylindrical inner tube body, a plugging lower end formed on the lower edge of the outer wall of the inner tube body and inserted and fixed with the air distribution holes of the wind distribution plate, a stop outer ring formed on the outer wall of the inner tube body, a tapered side wall formed on the upper part of the outer wall of the inner tube body and gradually widening from bottom to top, an upper end cap formed on the upper end of the tapered side wall, an annular groove formed on the inner wall of the tapered side wall, and upper air outlet holes circumferentially distributed on the annular groove;

[0009] An outer cover assembly, including an outer cover middle tube, a lower thick tube formed on the lower end of the outer cover middle tube, a stop ring groove formed on the lower end of the lower thick tube and in stop cooperation with the stop outer ring, lower ventilation holes circumferentially distributed in the middle of the lower thick tube, and an upper end cap formed on the upper end of the outer cover middle tube;

[0010] An adjustment assembly, disposed in the upper end cap, for adjusting the opening degree of the upper air outlet holes.

[0011] As a further embodiment:

[0012] Inside the upper end cap, there are successively arranged from bottom to top a lower circular cavity, a middle circular cavity, and an upper circular cavity with gradually decreasing diameters. There is a spacer ring between the lower circular cavity and the middle circular cavity. A worm through-hole is also provided on the side of the middle circular cavity. The upper end of the upper circular cavity is provided with an upper opening. The lower edge of the inner wall of the upper opening is provided with a limiting convex ring. The top wall of the upper circular cavity is circumferentially and uniformly provided with longitudinal connecting rods downward, and a stop disc is provided at the lower end of the longitudinal connecting rods.

[0013] As a further implementation:

[0014] The adjustment assembly includes:

[0015] A rotation assembly, including a driving worm rotatably arranged in the worm through-hole, and also including an annular worm gear rotatably arranged in the middle circular cavity and meshing with the driving worm, and drive key grooves circumferentially and uniformly arranged on the inner wall of the annular worm gear;

[0016] A follow-up assembly, including a sliding ring slidably sleeved on the inner wall of the annular worm gear, drive insertion keys circumferentially and uniformly arranged on the outer wall of the sliding ring and inserted and matched with the drive key grooves, a follow-up ring groove arranged on the inner wall of the sliding ring, and upper drive teeth circumferentially and uniformly arranged on the lower edge of the sliding ring;

[0017] A lifting assembly, including an internally threaded disc slidably arranged in the upper circular cavity, anti-rotation insertion holes circumferentially and uniformly arranged on the internally threaded disc and inserted and matched with the longitudinal connecting rods, an externally threaded rod screwed in the center of the internally threaded disc, an anti-drop ring groove arranged on the outer wall of the externally threaded rod and rotatably matched with the limiting convex ring, a lifting circular tube formed on the lower edge of the outer wall of the internally threaded disc, and a lifting convex ring arranged on the outer wall of the lifting circular tube and rotatably matched with the follow-up ring groove;

[0018] A shielding assembly, including an adjustment disc rotatably arranged in the lower circular cavity, lower drive teeth circumferentially and uniformly arranged on the upper end face of the adjustment disc and meshing with the upper drive teeth, an annular gear formed on the inner edge of the lower end face of the adjustment disc, a sealing gasket arranged on the inner wall of the annular gear and attached to the outer wall of the upper end cover, connecting inner rods circumferentially and uniformly arranged on the inner wall of the sealing gasket and inserted into the upper end cover, and shielding cover plates arranged at the lower ends of the connecting inner rods and corresponding to the upper air outlet holes one by one;

[0019] A quick adjustment terminal, including an input gear rotatably arranged in the lower circular cavity and meshing with the annular gear, a through longitudinal shaft arranged on the lower end face of the input gear and penetrating the lower end face of the lower circular cavity, and a lower terminal arranged at the lower end of the through longitudinal shaft.

[0020] As a further implementation:

[0021] The stop outer ring and the stop ring groove are fixed by welding.

[0022] As a further implementation:

[0023] The transmission keyway is arranged longitudinally, and the longitudinal length of the transmission keyway is at least times that of the transmission key.

[0024] As a further implementation:

[0025] A gasket ring groove for accommodating a sealing gasket is provided on the outer edge of the circumferential side wall of the upper end cover.

[0026] As a further implementation:

[0027] Arc-shaped side holes are evenly distributed circumferentially in the gasket ring groove for accommodating the connecting inner rod to pass through and rotate a certain angle around the central axis of the inner tube assembly therein.

[0028] This case also discloses a wind distribution plate, on which wind distribution holes are densely arranged, and a wind cap as described in any one of claims - is provided on each wind distribution hole.

[0029] This case also discloses a differential bed boiler, including at least:

[0030] A high-speed bed m, arranged on one side of the boiler furnace;

[0031] A low-speed bed n, arranged on the other side of the boiler furnace, and its height is higher than that of the high-speed bed m.

[0032] This case also discloses a differential bed boiler, further including:

[0033] A feeding port p, arranged on the side of the boiler furnace close to the high-speed bed m and higher than the high-speed bed m;

[0034] An ignition barrel q, arranged on the side of the boiler furnace below and close to the high-speed bed m;

[0035] A buried tube heating surface q, arranged on the side of the boiler furnace close to the low-speed bed n;

[0036] A material return device, arranged above the buried tube heating surface q in the boiler furnace.

[0037] Beneficial effects: The wind cap described in this case can adjust the opening area of the upper air outlet holes through two modes, thereby adjusting the air outlet efficiency and air pressure.

[0038] The precision adjustment mode of the wind cap described in this case is linear and delicate:

[0039] Relying on the worm and worm gear structure of the active worm and the annular worm gear, which has a high reduction ratio, when the active worm is twisted, the shielding component can be rotated by a very small angle. Further, the design of the follower component is delicate. It can be combined with or disconnected from the shielding component through longitudinal movement, and can always maintain its rotational connection with the rotating component while allowing longitudinal movement.

[0040] A differential bed boiler described in this case adopts a design of a high-speed bed and a low-speed bed, and the feed inlet is arranged on one side close to the high-speed bed, facilitating the direct falling of fuel onto the high-speed bed. This avoids the problem in the prior art where a high-speed bed is sandwiched between two low-speed beds, resulting in the feed inlet only being able to feed from both sides of the middle.

[0041] In a differential bed boiler described in this case, the igniter is arranged below and on the same side as the high-speed bed, facilitating under-bed ignition. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0043] Figure 1 is a schematic diagram of an embodiment of the differential bed.

[0044] Figure 2 is a schematic diagram of an embodiment of the air cap.

[0045] Figure 3 is a cross-sectional view of an embodiment of the air cap.

[0046] Figure 4 is a schematic diagram of an embodiment of the inner pipe assembly.

[0047] Figure 5 is a schematic diagram of an embodiment of the outer cover assembly.

[0048] Figure 6 is a partial cross-sectional view of an embodiment of the air cap.

[0049] Figure 7 is a partial cross-sectional view of another embodiment of the air cap.

[0050] Figure 8 is Figure 7 the cross-sectional view taken along the A-A section in

[0051] Figure 9 is Figure 7 the cross-sectional view taken along the B-B section in

[0052] Figure 10 is Figure 7 the cross-sectional view taken along the B-B section in

[0053] In the figure:

[0054] m. High-speed bed, n. Low-speed bed, p. Feed inlet, q. Igniter, r. Tube bank heating surface, s. Loop seal;

[0055] 1. Inner tube assembly, 11. Inner tube body, 12. Lower insertion end, 13. Outer retaining ring, 14. Conical side wall, 15. Upper end cap, 16. Annular groove, 17. Upper air outlet hole;

[0056] 2. Outer cover assembly, 21. Middle tube of outer cover, 22. Lower thick tube, 23. Retaining ring groove, 24. Lower ventilation hole, 25. Upper end cap, 25a. Lower circular cavity, 25b. Middle circular cavity, 25c. Upper circular cavity, 25d. Spacing ring, 25e. Worm through hole, 25f. Upper opening, 25g. Limiting convex ring, 25h. Longitudinal connecting rod, 25i. Retaining disc;

[0057] 3. Adjustment assembly;

[0058] 31. Rotating assembly, 31a. Driving worm, 31b. Annular worm gear, 31c. Transmission keyway;

[0059] 32. Follow-up assembly, 32a. Sliding ring, 32b. Transmission key, 32c. Follow-up ring groove, 32d. Upper transmission teeth;

[0060] 33. Lifting assembly, 33a. Inner threaded disc, 33b. Anti-rotation jack hole, 33c. Outer threaded rod, 33d. Anti-disengagement ring groove, 33e. Lifting round tube, 33f. Lifting convex ring;

[0061] 34. Shielding assembly, 34a. Adjusting disc, 34b. Lower transmission teeth, 34c. Annular gear, 34d. Sealing washer, 34e. Connecting inner rod, 34f. Shielding cover plate;

[0062] 35. Quick adjustment terminal, 35a. Input gear, 35b. Through longitudinal axis, 35c. Lower terminal. Specific embodiments

[0063] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application.

[0064] An air cap for a wind distribution plate, comprising:

[0065] The inner tube assembly 1 includes a hollow cylindrical inner tube body 11, a plugging lower end 12 formed at the lower edge of the outer wall of the inner tube body 11 and plugged and fixed with the air distribution holes of the air distribution plate, a blocking outer ring 13 formed on the outer wall of the inner tube body 11, a tapered side wall 14 formed on the upper part of the outer wall of the inner tube body 11 and gradually widening from bottom to top, and an upper end cap 15 formed at the upper end of the tapered side wall 14. An annular groove 16 is formed on the inner wall of the tapered side wall 14, and upper air outlet holes 17 are circumferentially and evenly distributed on the upper circumference of the annular groove 16.

[0066] The outer cover assembly 2 includes an outer cover middle tube 21, a lower thick tube 22 formed at the lower end of the outer cover middle tube 21, a blocking ring groove 23 formed at the lower end of the lower thick tube 22 and in blocking cooperation with the blocking outer ring 13, lower ventilation holes 24 circumferentially and evenly distributed in the middle of the lower thick tube 22, and an upper end cap 25 formed at the upper end of the outer cover middle tube 21.

[0067] The adjustment assembly 3 is arranged in the upper end cap 25 and is used to adjust the opening degree of the upper air outlet holes 17.

[0068] As a further implementation scheme:

[0069] In the upper end cap 25, a lower circular cavity 25a, a middle circular cavity 25b, and an upper circular cavity 25c with gradually decreasing diameters are respectively arranged from bottom to top. An interval ring 25d is arranged between the lower circular cavity 25a and the middle circular cavity 25b. A worm through hole 25e is also arranged on the side of the middle circular cavity 25b. An upper opening 25f is arranged at the upper end of the upper circular cavity 25c. A limiting convex ring 25g is arranged at the lower edge of the inner wall of the upper opening 25f. Vertical connecting rods 25h are circumferentially and evenly distributed downward on the top wall of the upper circular cavity 25c, and a blocking disc 25i is arranged at the lower end of the vertical connecting rods 25h.

[0070] As a further implementation scheme:

[0071] The adjustment assembly 3 includes:

[0072] A rotating component 31 includes a driving worm 31a rotatably arranged in the worm through hole 25e, and also includes an annular worm wheel 31b rotatably arranged in the middle circular cavity 25b and meshing with the driving worm 31a, and transmission key grooves 31c circumferentially and evenly distributed on the inner wall of the annular worm wheel 31b.

[0073] A following component 32 includes a sliding ring 32a slidably sleeved on the inner wall of the annular worm wheel 31b, transmission plug keys 32b circumferentially and evenly distributed on the outer wall of the sliding ring 32a and plugged and cooperating with the transmission key grooves 31c, a following ring groove 32c arranged on the inner wall of the sliding ring 32a, and upper transmission teeth 32d circumferentially and evenly distributed at the lower edge of the sliding ring 32a.

[0074] The lifting assembly 33 includes an internally threaded disk 33a slidably disposed in the upper circular cavity 25c, anti-rotation jacks 33b circumferentially and uniformly distributed on the internally threaded disk 33a and inserted and mated with the longitudinal connecting rod 25h, an externally threaded rod 33c screwed to the center of the internally threaded disk 33a, an anti-disengagement ring groove 33d formed on the outer wall of the externally threaded rod 33c and rotatably mated with the limit convex ring 25g, a lifting circular tube 33e formed on the lower edge of the outer wall of the internally threaded disk 33a, and a lifting convex ring 33f formed on the outer wall of the lifting circular tube 33e and rotatably mated with the follower ring groove 32c;

[0075] The shielding assembly 34 includes an adjusting disk 34a rotatably disposed in the lower circular cavity 25a, lower transmission teeth 34b circumferentially and uniformly distributed on the upper end surface of the adjusting disk 34a and meshed with the upper transmission teeth 32d, an annular gear 34c formed on the inner edge of the lower end surface of the adjusting disk 34a, a sealing washer 34d disposed on the inner wall of the annular gear 34c and attached to the outer wall of the upper end cover 15, connecting inner rods 34e circumferentially and uniformly distributed on the inner wall of the sealing washer 34d and inserted into the upper end cover 15, and shielding cover plates 34f disposed at the lower ends of the connecting inner rods 34e and corresponding to the upper air outlet holes 17 one by one;

[0076] The quick-adjustment terminal 35 includes an input gear 35a rotatably disposed in the lower circular cavity 25a and meshed with the annular gear 34c, a through longitudinal shaft 35b disposed on the lower end surface of the input gear 35a and penetrating through the lower end surface of the lower circular cavity 25a, and a lower terminal 35c disposed at the lower end of the through longitudinal shaft 35b.

[0077] As a further implementation:

[0078] The stop outer ring 13 and the stop ring groove 23 are fixed by welding.

[0079] As a further implementation:

[0080] The transmission key groove 31c is arranged longitudinally, and the longitudinal length of the transmission key groove 31c is at least twice that of the transmission key 32b.

[0081] As a further implementation:

[0082] A washer ring groove for accommodating the sealing washer 34d is provided on the outer edge of the circumferential side wall of the upper end cover 15.

[0083] As a further implementation:

[0084] Arc-shaped side holes are circumferentially and uniformly distributed in the washer ring groove for accommodating the connecting inner rod 34e to pass through and rotate a certain angle around the axis of the inner tube assembly 1 therein.

[0085] This case also discloses a method for adjusting the wind cap, including the following steps:

[0086] Step 1, Quick Adjustment Mode:

[0087] Under normal conditions, the follower assembly 32 is located at a high position, the upper transmission gear 32d is disengaged from the lower transmission gear 34b, and the rotating assembly 31 and the follower assembly 32 cannot drive the shielding assembly 34 to rotate.

[0088] Rotate the lower terminal 35c, the through longitudinal axis 35b, and the input gear 35a. The input gear 35a drives the annular gear 34c, the adjustment disc 34a, the sealing gasket 34d, the connecting inner rod 34e, and the shielding cover 34f to adjust the area of the shielding cover 34f covering the upper air outlet 17, thereby adjusting the effective ventilation area of the upper air outlet 17 and the ventilation efficiency and air pressure of the wind cap.

[0089] Step 2, Precise Adjustment Mode:

[0090] Rotate the external threaded rod 33c to drive the internal threaded disc 33a, the lifting round tube 33e, and the lifting convex ring 33f to descend.

[0091] The lifting convex ring 33f drives the follower ring groove 32c, the sliding ring 32a, and the upper transmission gear 32d to descend, realizing the meshing of the upper transmission gear 32d and the lower transmission gear 34b.

[0092] Rotate the driving worm 31a to drive the annular worm gear 31b and the transmission keyway 31c to rotate. The transmission keyway 31c drives the transmission key 32b, the sliding ring 32a, and the upper transmission gear 32d to rotate.

[0093] The rotation of the upper transmission gear 32d drives the lower transmission gear 34b, the adjustment disc 34a, the anti - detachment ring groove 33d, the lifting round tube 33e, and the lifting convex ring 33f to rotate, adjusting the ventilation efficiency and air pressure of the wind cap.

[0094] During the above process, the quick - adjustment terminal 35 rotates as a driven part driven by the annular gear 34c, without affecting the precise adjustment process.

[0095] This case also discloses a air distribution plate, on which air distribution holes are densely arranged, and each air distribution hole is provided with a wind cap as described in any one of claims 1 - 7.

[0096] This case also discloses a differential bed boiler, including at least:

[0097] A high - speed bed m, arranged on one side of the boiler furnace;

[0098] A low - speed bed n, arranged on the other side of the boiler furnace and having a height higher than that of the high - speed bed m.

[0099] This case also discloses a differential bed boiler, further including:

[0100] The feed port p is arranged on the side of the boiler furnace close to the high-speed bed m and is higher than the high-speed bed m;

[0101] Ignition tube q, set below the boiler furnace and close to the high-speed bed m;

[0102] The buried pipe heating surface q is set on the side of the boiler furnace close to the low-velocity bed n;

[0103] The material return device 7 is arranged in the boiler furnace above the buried pipe heating surface q.

[0104] It should be noted that there is an interference fit between the active worm 31a and the worm through hole 25e, and between the through longitudinal axis 35b and the circular hole allowing it to pass through, so that under normal conditions, the active worm 31a and the quick-adjust terminal 35 will not be subjected to the force of the fuel and cause unnecessary rotation.

[0105] Furthermore, the end of the active worm 31a, the lower end of the lower terminal 35c, and the upper end of the external threaded rod 33c are provided with hexagonal holes to facilitate twisting operations using a wrench.

Claims

1. A wind cap for a wind distribution plate, characterized in that: Comprising: Inner tube assembly (1), including a hollow cylindrical inner tube body (11), an insertion lower end (12) formed at the lower edge of the outer wall of the inner tube body (11) and inserted and fixed with the air distribution holes of the air distribution plate, a stop outer ring (13) formed on the outer wall of the inner tube body (11), a tapered side wall (14) formed on the upper part of the outer wall of the inner tube body (11) and gradually widening from bottom to top, and an upper end cover (15) formed at the upper end of the tapered side wall (14). An annular groove (16) is formed on the inner wall of the tapered side wall (14), and upper air outlet holes (17) are circumferentially and evenly distributed on the annular groove (16); Outer cover assembly (2), including an outer cover middle tube (21), a lower thick tube (22) formed at the lower end of the outer cover middle tube (21), a stop ring groove (23) formed at the lower end of the lower thick tube (22) and in stop cooperation with the stop outer ring (13), lower ventilation holes (24) circumferentially and evenly distributed in the middle of the lower thick tube (22), and an upper end cap (25) formed at the upper end of the outer cover middle tube (21); Adjustment assembly (3), arranged inside the upper end cap (25) for adjusting the opening degree of the upper air outlet holes (17); Inside the upper end cap (25), there are successively arranged a lower circular cavity (25a), a middle circular cavity (25b), and an upper circular cavity (25c) with diameters decreasing from bottom to top. An interval ring (25d) is arranged between the lower circular cavity (25a) and the middle circular cavity (25b). A worm through hole (25e) is also arranged on the side of the middle circular cavity (25b). An upper opening (25f) is arranged at the upper end of the upper circular cavity (25c). A limiting convex ring (25g) is arranged at the lower edge of the inner wall of the upper opening (25f). The top wall of the upper circular cavity (25c) is circumferentially and evenly provided with longitudinal connecting rods (25h) downward, and a stop disc (25i) is arranged at the lower end of the longitudinal connecting rods (25h); The adjustment assembly (3) includes: A rotating component (31), including a driving worm (31a) rotatably arranged in the worm through hole (25e), and also including an annular worm gear (31b) rotatably arranged in the middle circular cavity (25b) and meshing with the driving worm (31a), and transmission key grooves (31c) circumferentially and evenly distributed on the inner wall of the annular worm gear (31b); A following component (32), including a sliding ring (32a) slidably sleeved on the inner wall of the annular worm gear (31b), transmission key inserts (32b) circumferentially and evenly distributed on the outer wall of the sliding ring (32a) and inserted and matched with the transmission key grooves (31c), a following ring groove (32c) arranged on the inner wall of the sliding ring (32a), and upper transmission teeth (32d) circumferentially and evenly distributed on the lower edge of the sliding ring (32a); The lifting component (33) includes an internally threaded disk (33a) slidably disposed in the upper circular cavity (25c), anti-rotation jacks (33b) circumferentially and uniformly distributed on the internally threaded disk (33a) and inserted and matched with the longitudinal connecting rod (25h), an externally threaded rod (33c) screwed in the center of the internally threaded disk (33a), an anti-disengagement ring groove (33d) formed on the outer wall of the externally threaded rod (33c) and rotatably matched with the limit convex ring (25g), a lifting circular tube (33e) formed on the lower edge of the outer wall of the internally threaded disk (33a), and a lifting convex ring (33f) formed on the outer wall of the lifting circular tube (33e) and rotatably matched with the follower ring groove (32c); The shielding component (34) includes an adjusting disk (34a) rotatably disposed in the lower circular cavity (25a), lower transmission teeth (34b) circumferentially and uniformly distributed on the upper end surface of the adjusting disk (34a) and meshed with the upper transmission teeth (32d), an annular gear (34c) formed on the inner edge of the lower end surface of the adjusting disk (34a), a sealing gasket (34d) disposed on the inner wall of the annular gear (34c) and attached to the outer wall of the upper end cover (15), connecting inner rods (34e) circumferentially and uniformly distributed on the inner wall of the sealing gasket (34d) and inserted into the upper end cover (15), and shielding cover plates (34f) disposed at the lower ends of the connecting inner rods (34e) and corresponding to the upper air outlet holes (17) one by one; The quick-adjusting terminal (35) includes an input gear (35a) rotatably disposed in the lower circular cavity (25a) and meshed with the annular gear (34c), a penetrating longitudinal shaft (35b) disposed on the lower end surface of the input gear (35a) and penetrating through the lower end surface of the lower circular cavity (25a), and a lower terminal (35c) disposed at the lower end of the penetrating longitudinal shaft (35b).

2. The air cap for a air distribution plate according to claim 1, wherein: The stop outer ring (13) and the stop ring groove (23) are fixedly welded.

3. The air cap for a air distribution plate according to claim 2, wherein: The transmission key groove (31c) is arranged longitudinally, and the longitudinal length of the transmission key groove (31c) is at least twice that of the transmission key (32b).

4. The air cap for a air distribution plate according to claim 3, wherein: A gasket ring groove for accommodating the sealing gasket (34d) is provided on the outer edge of the circumferential side wall of the upper end cover (15).

5. The air cap for a air distribution plate according to claim 4, wherein: Arc-shaped side holes are circumferentially and uniformly distributed in the gasket ring groove for accommodating the connecting inner rod (34e) to pass through and rotate a certain angle around the central axis of the inner tube assembly (1) therein.

6. An air cap adjustment method using the air cap according to any one of claims 1-5, comprising the following steps: Step 1, quick adjustment mode: Under normal conditions, the follower assembly (32) is in the high position, the upper transmission teeth (32d) and the lower transmission teeth (34b) are out of contact, and the rotating assembly (31) and the follower assembly (32) cannot drive the shielding component (34) to rotate; Rotate the lower terminal (35c), the through longitudinal axis (35b), and the input gear (35a). The input gear (35a) drives the annular gear (34c), the adjusting disc (34a), the sealing washer (34d), the connecting inner rod (34e), and the shielding cover plate (34f), and adjust the area of the shielding cover plate (34f) covering the upper air outlet hole (17), thereby adjusting the effective ventilation area of the upper air outlet hole (17), and adjusting the ventilation efficiency and air pressure of the wind cap; Step 2, precise adjustment mode: Rotate the outer threaded rod (33c), drive the internal threaded disc (33a), the lifting round tube (33e), and the lifting convex ring (33f) to descend; The lifting convex ring (33f) drives the follower ring groove (32c), the sliding ring (32a), and the upper transmission tooth (32d) to descend, realizing the meshing of the upper transmission tooth (32d) and the lower transmission tooth (34b); Rotate the driving worm (31a), drive the annular worm gear (31b) and the transmission key groove (31c) to rotate. The transmission key groove (31c) drives the transmission key (32b), the sliding ring (32a), and the upper transmission tooth (32d) to rotate; The rotation of the upper transmission tooth (32d) drives the lower transmission tooth (34b), the adjusting disc (34a), the anti - detachment ring groove (33d), the lifting round tube (33e), and the lifting convex ring (33f) to rotate, adjusting the ventilation efficiency and air pressure of the wind cap.

7. A wind distribution plate, characterized in that: The wind distribution plate is densely provided with wind distribution holes, and each wind distribution hole is provided with a wind cap as described in any one of claims 1 - 5.

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