Dynamic and static rings capable of adjusting nozzle angle of coal mill

Abstract

The invention discloses a coal mill nozzle angle adjustable dynamic and static ring, and relates to the technical field of coal mills, the coal mill nozzle angle adjustable dynamic and static ring comprises a driving assembly, the axis of the top of the driving assembly is fixedly connected with a transmission assembly, the top of the driving assembly is fixedly connected with a plurality of external pressure assemblies, and the top of the transmission assembly is fixedly connected with an internal pressure assembly. According to the movable and static ring with the adjustable nozzle angle of the coal mill, through the replaceable movable ring and static ring assembly structure, a static seal and a wear-resistant protection ring matched with the rotary movable ring are provided and can be independently replaced, and the overall service life is prolonged; the problems that a traditional fixed type movable ring and a traditional fixed type movable ring are difficult to adjust and high in maintenance cost are solved through cooperative operation of the modularized movable ring, electromechanical cooperative axial clamping and an angle adjusting mechanism with visual scales and rapid locking, high-precision online optimization of pulverized coal fineness and distribution is achieved, and the production efficiency is improved. The combustion efficiency of the boiler is improved, the fuel flexibility is adapted, and the maintenance cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of coal mill technology, specifically to a dynamic and static ring with an adjustable nozzle angle for a coal mill. Background Technology

[0002] Medium-speed vertical coal mills are commonly used in the pulverizing systems of boilers in domestic coal-fired power plants. Their main function is to grind the raw coal into uniform pulverized coal using grinding rollers and liners. Primary air is blown into the mill through the rotating ring to form a circulating air-coal mixture. The primary air carries the qualified fine coal from the separator out of the mill to the burner for combustion, while the coal powder that does not meet the fineness requirements falls back to the grinding rollers for further grinding. The remaining stones, iron blocks, and other impurities fall into the ash discharge box through the rotating ring's air passage. The rotating ring is a key component of the medium-speed vertical coal mill, playing a crucial role in drying and transporting the pulverized coal, ensuring the circulation ratio of the internal flow field of the mill, and delivering the ground pulverized coal from the separator to the boiler burner.

[0003] An invention with publication number CN119076133B has been disclosed, which discloses a coal mill motorized static ring structure. "It includes a mounting plate, a moving ring mechanism and a static ring mechanism. The mounting plate is fixedly connected to a mounting ring. The moving ring mechanism includes an inner baffle, an outer baffle, an arc plate and a fixing component. The static ring mechanism includes a static ring body, a sealing ring and a driving component. This coal mill motorized static ring structure is formed by splicing together multiple sets of moving ring structures composed of inner baffles, outer baffles and arc plates to form a whole moving ring." However, the existing coal mill motorized static ring has pain points such as the nozzle blade angle being fixed and not adjustable, being unable to adapt to changes in coal type or load adjustment requirements for coal powder fineness and distribution, and the need for time-consuming and labor-intensive overall disassembly for replacement and maintenance. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a dynamic and static ring with an adjustable nozzle angle for a coal mill, which solves the problems mentioned in the background art, such as the fixed and non-adjustable nozzle blade angle, inability to adapt to changes in coal type or load adjustment requirements for coal powder fineness and distribution, and the time-consuming and labor-intensive process of overall disassembly for replacement and maintenance.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an adjustable moving and stationary ring for a coal mill nozzle, comprising a drive assembly, a transmission assembly fixedly connected to the shaft at the top of the drive assembly, multiple external pressure assemblies fixedly connected to the top of the drive assembly, an internal pressure assembly fixedly connected to the top of the transmission assembly, multiple assembled moving rings movably connected to the opposite side of the external and internal pressure assemblies, an adjustment assembly fixedly connected to the outward-facing side of the multiple assembled moving rings, and a stationary ring assembly bolted to the top of each of the multiple assembled moving rings.

[0006] Optionally, the drive assembly includes a drive motor, with a tray fixedly connected to the top shaft of the drive motor, and the tray's top perimeter fixedly connected to the bottom of a plurality of external pressure components.

[0007] Optionally, the transmission assembly includes a lower turntable, a transmission shaft is fixedly connected to the axis of the lower turntable, the bottom of the transmission shaft is fixedly connected to the axis of the top of the tray, an upper turntable is sleeved on the top of the side surface of the transmission shaft, and multiple connecting plates are evenly distributed on the side surface of the upper turntable, with the top of the connecting plates bolted to the bottom of the assembly moving ring facing outward.

[0008] Optionally, the external pressure assembly includes multiple external pressure fan rings, the bottoms of which are fixedly connected to the perimeter of the top of the tray. A toothed track is fixedly connected to the center of each external pressure fan ring, and both sides of the toothed track are provided with slide rail structures. Electric sliders are slidably connected in the slide rails on both sides of the toothed track. A movable gear is fixedly connected to one end of the shaft on the opposite side of two electric sliders, and the bottom of the movable gear is meshed in the toothed track. An external pressure plate is fixedly connected to the inward-facing end of each of the two electric sliders. A top plate is fixedly connected to the side where the electric slider and the external pressure plate form an angle.

[0009] Optionally, the internal pressure assembly includes a hollow disc, the core of which is sleeved on the side surface of the transmission shaft. A double-layer ring is fixedly connected to the top of the hollow disc. Multiple protrusions are evenly distributed on the inner wall of the platform in the middle of the double-layer ring. A guide is fixedly connected to the middle of the top of each of the protrusions, and the two sides of the guide are provided with a sliding channel structure. A sliding rod is slidably connected in the sliding channel on both sides of the top of the protrusion. An H-plate is fixedly connected to the top of two sliding rods. A locking block is fixedly connected to the middle of the bottom end of the H-plate. Threaded rods are fixedly connected to both sides of the top of the H-plate. The four threaded rods are arranged in two groups, and the side surfaces of the two groups of threaded rods are threadedly connected with clamping plates. A central push plate is fixedly connected to the middle of the top of the H-plate.

[0010] Optionally, the assembly moving ring includes an outer arc plate, the bottom of the side surface of the outer arc plate is threaded to the inward end of the connecting plate and the outer pressure plate, the top of the outer arc plate is fixedly connected to a nozzle ring, the bottom of the nozzle ring is fixedly connected to an inner arc plate, the inner wall of the inward side of the nozzle ring is fixedly connected to a vertical plate, and the side surface of the vertical plate is engaged between the middle push plate and the clamp composed of two clamping plates.

[0011] Optionally, the adjustment assembly includes an L-plate and a rocker arm. One end of the L-plate is fixedly connected to the top of the outer arc plate. The side surface of the rocker arm penetrates the interior of the outer arc plate. A nozzle blade is fixedly connected to one end of the rocker arm extending between the outer and inner arc plates. A washer is penetrated through the side surface of the rocker arm extending to the outside of the outer arc plate. A locking rod is fixedly connected to one end of the rocker arm extending to the washer. A lever is sleeved on the side surface of the locking rod, and one end of the lever has a pointer structure. Two... Two pull rods are fixedly connected to the outward-facing ends of each pull rod. A spring rod is fixedly connected to the outward-facing side of the pull rod and the L-plate. The side surfaces of the two pull rods are connected through to the vertical side of the L-plate. A collar is sleeved at the end of each pull rod extending to the vertical side of the L-plate. Both inward-facing ends of the collar are engaged with the outward-facing end of the fitting rod. A scale ring is fixedly connected to the side surface of the collar. A shaped rod is engaged with the inner wall of the collar, and one end of the shaped rod is fixedly connected to the vertical inner wall of the L-plate. Both the fitting rod and the collar are hollow structures.

[0012] Optionally, the stationary ring assembly includes a trapezoidal arc ring, the bottom of which is fixedly connected to the top of the nozzle ring, and a top arc ring is snapped onto the top of the trapezoidal arc ring. One end of the trapezoidal arc ring and the top arc ring are connected by a locking rod, and the bottom of the locking rod extends to the bottom of the trapezoidal arc ring and is bolted to the top of the nozzle ring. A wear-resistant plate is fixedly connected to the side surface of the trapezoidal arc ring.

[0013] This invention provides an adjustable moving and stationary ring for a coal mill nozzle, which has the following advantages: The adjustable nozzle angle dynamic and static rings of this coal mill provide common rotational power through the drive and transmission components. Multiple assembled dynamic rings are used as independent modules, clamped and fixed together with external and internal pressure components. The angle of their nozzle blades can be changed by adjusting the components. At the same time, the static ring components form a static sealing surface. Its core advantage is that it realizes online, precise and adjustable control of the coal powder flow field during coal mill operation, and greatly improves the maintainability of the equipment. It forms a beneficial architecture with modular dynamic rings, centralized drive and independent adjustment.

[0014] The adjustable nozzle angle of this coal mill uses a precision actuator to radially press and finely adjust the position of the assembled rotating ring module from the outside. The outer pressure fan ring provides the mounting base, and the toothed track and slide rail on it form a precision guide rail. The main adjustment function is that the electric slider drives the moving gear to move along the toothed track, which drives the outer pressure plate to move radially. This allows the operator to remotely and precisely control the radial pressing force of each rotating ring module, ensuring both locking and quick release when changing modules.

[0015] The adjustable nozzle angle of this coal mill uses a precision actuator that clamps, positions, and fixes the angle reference of the assembled moving ring module from the inner ring through an internal pressure component. This provides an extremely stable and adjustable bidirectional positioning for each moving ring module, ensuring that it does not shift under high-speed rotation and coal powder scouring. The core functional module, which can be independently replaced and integrates the nozzle flow channel, allows for the individual replacement of severely worn sectors, greatly saving maintenance costs and downtime.

[0016] The adjustable moving and stationary rings of the coal mill nozzles enable precise, visual adjustment and mechanical locking of the nozzle blade angle within a single assembled moving ring. By rotating the lever (606), the locking rod (605) and rocker arm (602) are rotated, thereby changing the blade angle. The scale ring (609) provides a scale reference, realizing the quantification and visualization of angle adjustment with high precision. Furthermore, the adjustment components form a quick locking and releasing mechanism to prevent angle changes caused by vibration during operation. This design makes the adjustment operation safe, fast, and reliable.

[0017] The adjustable nozzle angle of this coal mill features a rotating and stationary ring, along with a replaceable stationary ring assembly structure. This provides a static seal and wear-resistant protection ring that matches the rotating rotating ring. These rings can be replaced individually, extending the overall service life. The modular rotating ring, the electromechanical axial clamping, and the coordinated operation of the angle adjustment mechanism with a visual scale and quick locking solve the problems of difficult adjustment and high maintenance costs associated with traditional fixed rotating and stationary rings. This enables high-precision online optimization of coal powder fineness and distribution, improving boiler combustion efficiency, fuel adaptability, and reducing maintenance costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall top view of the invention; Figure 2 This is a schematic diagram of the overall head-up structure of the invention; Figure 3 This is a schematic diagram of the enlarged structure of the driving component in this invention; Figure 4 This is an enlarged structural diagram of the transmission component in the invention; Figure 5 This is a schematic diagram of the top structure in the invention; Figure 6 This is a schematic diagram of the connection structure between the transmission component and the external pressure component in this invention; Figure 7 This is an enlarged structural diagram of the internal pressure component in the invention; Figure 8 This is a partially enlarged structural diagram of the internal pressure component in this invention; Figure 9 This is a top view of the assembled dynamic ring structure in this invention; Figure 10This is a bottom-view schematic diagram of the assembly dynamic ring structure in this invention; Figure 11 This is a schematic diagram of the connection structure between the assembling of the dynamic ring and the adjustment component in this invention; Figure 12 This is a schematic diagram of the enlarged structure of the adjustment component in this invention; Figure 13 This is a magnified schematic diagram of the stationary ring component in this invention.

[0019] In the diagram: 1. Drive assembly; 101. Drive motor; 102. Tray; 2. Transmission assembly; 201. Lower turntable; 202. Transmission shaft; 203. Upper turntable; 204. Connecting plate; 3. External pressure assembly; 301. External pressure fan ring; 302. Toothed track; 303. Electric slider; 304. Moving gear; 305. External pressure plate; 306. Top plate; 4. Internal pressure assembly; 401. Hollow disc; 402. Double-layer ring; 403. Boss; 404. Track; 405. Moving rod; 406. H-plate; 407. Locking block; 408. Middle push plate; 40 9. Clamping plate; 4010. Threaded rod; 5. Assembly moving ring; 501. Outer arc plate; 502. Nozzle ring; 503. Inner arc plate; 504. Vertical plate; 6. Adjustment assembly; 601. L-plate; 602. Rocker arm; 603. Washer; 604. Nozzle blade; 605. Fitting rod; 606. Lever; 607. Irregular rod; 608. Collar; 609. Ruler ring; 6010. Pull rod; 6011. Pull handle; 6012. Spring rod; 7. Stationary ring assembly; 701. Trapezoidal arc ring; 702. Top arc ring; 703. Locking rod; 704. Wear-resistant plate. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] Please see Figures 1 to 13 The present invention provides a technical solution: a dynamic and static ring with adjustable nozzle angle for a coal mill, comprising a drive assembly 1, a transmission assembly 2 fixedly connected to the shaft at the top of the drive assembly 1, multiple external pressure assemblies 3 fixedly connected to the top of the drive assembly 1, an internal pressure assembly 4 fixedly connected to the top of the transmission assembly 2, multiple assembled dynamic rings 5 ​​movably connected to the opposite side of the external pressure assembly 3 and the internal pressure assembly 4, an adjustment assembly 6 fixedly connected to the outward side of the multiple assembled dynamic rings 5, and a static ring assembly 7 bolted to the top of each of the multiple assembled dynamic rings 5.

[0024] In this embodiment, as Figure 3 As shown, the drive assembly 1 includes a drive motor 101, and a tray 102 is fixedly connected to the shaft at the top of the drive motor 101. The top of the tray 102 is fixedly connected to the bottom of multiple external pressure assemblies 3 around its perimeter.

[0025] In this embodiment, as Figure 4 As shown, the transmission assembly 2 includes a lower turntable 201, a transmission shaft 202 is fixedly connected to the axis of the lower turntable 201, the bottom of the transmission shaft 202 is fixedly connected to the axis of the top of the tray 102, an upper turntable 203 is sleeved on the top of the side surface of the transmission shaft 202, and multiple connecting plates 204 are evenly distributed on the side surface of the upper turntable 203, and the top of the connecting plates 204 is bolted to the bottom of the outward side of the assembly moving ring 5.

[0026] In this embodiment, as Figure 6 As shown, the external pressure assembly 3 includes multiple external pressure fan rings 301. The bottom of each external pressure fan ring 301 is fixedly connected to the top of the tray 102 around the perimeter. A toothed track 302 is fixedly connected to the middle of the external pressure fan ring 301, and both sides of the toothed track 302 are provided with slide rail structures. Electric sliders 303 are slidably connected in the slide rails on both sides of the toothed track 302. A moving gear 304 is fixedly connected to one end of the shaft on the opposite side of the two electric sliders 303, and the bottom of the moving gear 304 is meshed in the toothed track 302. An external pressure plate 305 is fixedly connected to the inward end of each of the two electric sliders 303. A top plate 306 is fixedly connected to one side of the angle formed by the electric sliders 303 and the external pressure plate 305.

[0027] In this embodiment, as Figure 7 , 8As shown, the internal pressure component 4 includes a hollow disk 401. The hollow disk 401 is sleeved on the side surface of the transmission shaft 202 at its axial center. A double-layer ring 402 is fixedly connected to the top of the hollow disk 401. Multiple protrusions 403 are evenly distributed on the inner wall of the platform in the middle of the double-layer ring 402. A locking channel 404 is fixedly connected to the middle of the top of each of the multiple protrusions 403. The two sides of the locking channel 404 are set as sliding channels. A sliding rod 405 is slidably connected in the sliding channels on both sides of the top of the protrusions 403. An H-plate 406 is fixedly connected to the top of the two sliding rods 405. A locking block 407 is fixedly connected to the middle of the bottom end of the H-plate 406. Threaded rods 4010 are fixedly connected to both sides of the top of the H-plate 406. The four threaded rods 4010 are in groups of two, and the side surfaces of the two groups of threaded rods 4010 are threadedly connected to clamping plates 409. A middle push plate 408 is fixedly connected to the middle of the top of the H-plate 406.

[0028] In this embodiment, as Figure 9 , 10 As shown in Figure 11, the assembled moving ring 5 includes an outer arc plate 501. The bottom of the side surface of the outer arc plate 501 is threadedly connected to the connecting plate 204 and the inner end of the outer pressure plate 305. A nozzle ring 502 is fixedly connected to the top of the outer arc plate 501. An inner arc plate 503 is fixedly connected to the inner side of the bottom of the nozzle ring 502. A vertical plate 504 is fixedly connected to the inner wall of the inner side of the nozzle ring 502. The side surface of the vertical plate 504 is engaged between the middle push plate 408 and the clamping fixture composed of two clamping plates 409.

[0029] In this embodiment, as Figure 12As shown, the adjustment assembly 6 includes an L-plate 601 and a rocker arm 602. One end of the L-plate 601 is fixedly connected to the top of the outer arc plate 501. The side surface of the rocker arm 602 extends through the interior of the outer arc plate 501. A nozzle blade 604 is fixedly connected to one end of the rocker arm 602 extending between the outer arc plate 501 and the inner arc plate 503. A washer 603 is connected through the side surface of the rocker arm 602 extending to the outside of the outer arc plate 501. A fitting rod 605 is fixedly connected to one end of the rocker arm 602 extending to the washer 603. A lever 606 is sleeved on the side surface of the fitting rod 605, and one end of the lever 606 is provided with a pointer structure. Two pull rods 60 are connected through the interior of the vertical end of the L-plate 601. 10. A handle 6011 is fixedly connected to the outward end of each of the two pull rods 6010. A spring rod 6012 is fixedly connected to the outward side of the handle 6011 and the L plate 601. The side surfaces of the two pull rods 6010 are connected to the vertical side of the L plate 601. A collar 608 is sleeved at the end of the pull rod 6010 extending to the vertical side of the L plate 601. Both inward ends of the collar 608 are engaged with the outward end of the fitting rod 605. A scale ring 609 is fixedly connected to the side surface of the collar 608. A special-shaped rod 607 is engaged with the inner wall of the collar 608, and one end of the special-shaped rod 607 is fixedly connected to the vertical inner wall of the L plate 601. Both the fitting rod 605 and the collar 608 are hollow structures.

[0030] In this embodiment, as Figure 13 As shown, the stationary ring assembly 7 includes a trapezoidal arc ring 701. The bottom of the trapezoidal arc ring 701 is fixedly connected to the top of the nozzle ring 502. The top of the trapezoidal arc ring 701 is snapped with a top arc ring 702. One end of the trapezoidal arc ring 701 and the top arc ring 702 are connected by a locking rod 703. The bottom of the locking rod 703 extends to the bottom of the trapezoidal arc ring 701 and is bolted to the top of the nozzle ring 502. A wear-resistant plate 704 is fixedly connected to the side surface of the trapezoidal arc ring 701.

[0031] The method of using this invention: The adjustable nozzle angle moving and stationary ring of the coal mill operates as follows: like Figures 1 to 13As shown, the assembly ring 5 of the coal mill is first assembled. The outer arc plate 501 is shimmed using the connecting plate 204. Simultaneously, the bolts are rotated to fix the outer arc plate 501 to the bottom of its side surface and the upper turntable 203 to the top of its side surface. Then, the electric slider 303 in the outer pressure assembly 3 and the clamping plate 409 in the inner pressure assembly 4 are simultaneously activated. The electric slider 303 drives the internal moving gear 304 to rotate forward in the gear track 302. During this forward movement, the outer pressure plate 305 simultaneously fixes the outer arc plate 501. The two clamping plates 409 located at the top of the boss 403 slide along the slideways on both sides of the guideway 404 along the moving rod 405 at the bottom of the threaded rod 4010. This continues until the two clamping plates 409 and the middle push plate 408 clamp the vertical plate 504. Then, the threaded rod 4010 is rotated to cause the H-plate 406 and the clamping block 407 to fall into the guideway 404 and be fixed in place. Finally, the pull is activated. Move spring rod 6012 outward by 6011. During the movement, collar 608 moves along the side surface of profile rod 607. Then, hold lever 606 and rotate rocker arm 602 and nozzle blade 604. After releasing pull handle 6011, collar 608 moves forward and locks the front end of fitting rod 605. The pointer at one end of lever 606 is fixed after checking the rotation angle against the scale ring 609. Adjust the other nozzle blades 604 in sequence. Rotate locking rod 703 to fix trapezoidal ring 701 and top arc ring 702 onto nozzle ring 502 in sequence. Start drive motor 101 to make tray 102 and lower turntable 201 rotate together with internal drive shaft rod 202. When rotating, drive double ring 402 to rotate synchronously. Assembly moving ring 5, which is held by external pressure component 3 and internal pressure component 4, also begins to rotate. Coal powder is separated and sprayed outward along nozzle ring 502 and upper turntable 203.

[0032] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A movable and stationary ring of a coal mill nozzle angle adjustable, comprising a drive assembly (1), characterized in that: The top of the driving assembly (1) is fixedly connected with a transmission assembly (2), the top of the driving assembly (1) is fixedly connected with a plurality of outer pressure assemblies (3), the top of the transmission assembly (2) is fixedly connected with an inner pressure assembly (4), the opposite side of the outer pressure assembly (3) and the inner pressure assembly (4) is movably connected with a plurality of assembly dynamic rings (5), the side away from the outer side of the plurality of assembly dynamic rings (5) is fixedly connected with an adjusting assembly (6), and the top of the plurality of assembly dynamic rings (5) is bolted with a static ring assembly (7).

2. A dynamic-static ring with adjustable nozzle angle for a coal mill as claimed in claim 1, wherein: The driving assembly (1) comprises a driving motor (101), and the top of the driving motor (101) is fixedly connected with a tray (102).

3. A dynamic-static ring with adjustable nozzle angle for a coal mill as claimed in claim 2, wherein: The transmission assembly (2) comprises a lower rotating disc (201), and the axis of the lower rotating disc (201) is fixedly connected with a transmission shaft (202).

4. A dynamic-static ring with adjustable nozzle angle for a coal mill as claimed in claim 2, wherein: The outer pressure assembly (3) comprises a plurality of outer pressure fan rings (301), and the bottoms of the plurality of outer pressure fan rings (301) are fixedly connected around the top of the tray (102). The outer pressure assembly (3) comprises a plurality of outer pressure fan rings (301), and the bottoms of the plurality of outer pressure fan rings (301) are fixedly connected around the top of the tray (102).

5. A dynamic-static ring with adjustable nozzle angle for a coal mill as claimed in claim 3, wherein: The inner pressure assembly (4) comprises a hollow disc (401), the shaft center of the hollow disc (401) is sleeved on the side surface of the transmission shaft rod (202), the top of the hollow disc (401) is fixedly connected with a double-layer ring (402), the inner wall of the middle platform of the double-layer ring (402) is equidistantly provided with a plurality of convex bases (403), the middle part of the top of the plurality of convex bases (403) is fixedly connected with a card channel (404), and the two sides of the card channel (404) are provided as a moving channel structure, the moving channel on the top of the two sides of the convex base (403) is slidably connected with a moving rod (405), the top of the two moving rods (405) is fixedly connected with an H plate (406), the middle part of the bottom of the H plate (406) is fixedly connected with a clamping block (407), the two sides of the top of the H plate (406) are fixedly connected with a threaded rod (4010), two of the four threaded rods (4010) are a group, and the side surfaces of the two groups of threaded rods (4010) are fixedly connected with a clamping plate (409), and the middle part of the top of the H plate (406) is fixedly connected with a middle push plate (408).

6. A dynamic-static ring with adjustable nozzle angle for a coal mill as claimed in claim 5, wherein: The assembled dynamic ring (5) comprises an outer arc plate (501), the bottom of the side surface of the outer arc plate (501) is screw-connected to the inner end of the connecting plate (204) and the outer pressure plate (305), the top of the outer arc plate (501) is fixedly connected with a nozzle ring (502), the bottom of the inner side of the nozzle ring (502) is fixedly connected with an inner arc plate (503), the inner wall of the inner side of the nozzle ring (502) is fixedly connected with a vertical plate (504), and the side surface of the vertical plate (504) is clamped between the clamp formed by the middle push plate (408) and the two clamping plates (409).

7. A dynamically adjustable nozzle angle for a coal pulverizer according to claim 6, wherein: The adjusting assembly (6) comprises an L plate (601) and a rocker (602), one end of the L plate (601) is fixedly connected to the top of the outer arc plate (501), the side surface of the rocker (602) is throughly connected to the inside of the outer arc plate (501), one end of the rocker (602) extending to the inside between the outer arc plate (501) and the inner arc plate (503) is fixedly connected with a nozzle blade (604), the side surface of the rocker (602) extending to the outside of the outer arc plate (501) is throughly connected with a gasket (603), one end of the rocker (602) extending to the gasket (603) is fixedly connected with an embedded rod (605), the side surface of the embedded rod (605) is sleeved with a pull rod (606), one end of the pull rod (606) is provided with a pointer structure, the inside of one end of the L plate (601) is throughly connected with two pull rods (6010), the outward end of the two pull rods (6010) is fixedly connected with a pull handle (6011), the pull handle (6011) and the outward side of the L plate (601) are fixedly connected with a spring rod (6012), the side surface of the two pull rods (6010) is throughly connected to the vertical side of the L plate (601), one end of the pull rod (6010) extending to the vertical side of the L plate (601) is sleeved with a thimble (608), the inward two ends of the thimble (608) are clamped to the outward end of the embedded rod (605), the side surface of the thimble (608) is fixedly connected with a scale ring (609), the inner wall of the thimble (608) is clamped with a special-shaped rod (607), one end of the special-shaped rod (607) is fixedly connected to the inner wall of the L plate (601), and the embedded rod (605) and the thimble (608) are both hollow structures.

8. A dynamic-static ring with adjustable nozzle angle for a coal mill as claimed in claim 6, wherein: The static ring assembly (7) comprises a ladder arc ring (701), the bottom of the ladder arc ring (701) is fixedly connected to the top of the nozzle ring (502), the top of the ladder arc ring (701) is clamped with a top arc ring (702), one end of the ladder arc ring (701) and the top arc ring (702) is throughly connected by a lock rod (703), the bottom of the lock rod (703) extending to one end of the bottom of the ladder arc ring (701) is bolted to the top of the nozzle ring (502), and the side surface of the ladder arc ring (701) is fixedly connected with a wear plate (704).

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