A coal mill moving and static ring structure

Abstract

The invention discloses a coal mill dynamic and static ring structure, relates to the field of coal mills, and solves the problems of the existing coal mill dynamic and static ring structure having a fixed structure, a large volume, inconvenient assembly and disassembly and a poor sealing effect when in use. The structure comprises a mounting plate, a dynamic ring mechanism and a static ring mechanism. The mounting plate is fixedly connected with a mounting ring. The dynamic ring mechanism comprises an inner baffle plate, an outer baffle plate, an arc plate and a fixing member. The static ring mechanism comprises a static ring body, a sealing ring and a driving member. The coal mill dynamic and static ring structure is formed by splicing a dynamic ring structure composed of multiple groups of inner baffle plates, outer baffle plates and arc plates to form a dynamic ring as a whole. At the initial stage of forward rotation of the mounting plate, the inner baffle plate is fixed by the fixing member, and the dynamic ring mechanism is driven to rotate synchronously. When the mounting plate rotates reversely, the fixing state of the inner baffle plate by the fixing member is released, thereby improving the disassembly efficiency. When the outer baffle plate rotates, the sealing ring is driven downward by the driving member, so that the sealing ring can maintain a state of close contact with the top surface of the outer baffle plate.

Description

Technical Field

[0001] The invention relates to the technical field of coal mills, in particular to a coal mill dynamic and static ring structure. Background Art

[0002] Medium-speed vertical coal mill is a commonly used equipment in the boiler pulverizing system of domestic coal-fired power plants. Its main function is to use the grinding roller and lining to grind the raw coal into uniform coal powder. The primary air is blown into the coal mill by the moving ring to form a circulating air-powder mixture. The primary air will take the qualified fine powder out of the coal mill from the separator and send it to the burner for combustion, while the coal powder with unqualified fineness will fall back to the grinding roller for grinding. The remaining stone coal, iron blocks and other debris will fall into the slag box through the moving ring air duct. The moving ring is a key component of the medium-speed vertical coal mill. It plays the role of drying coal powder, transporting coal powder, ensuring the circulation rate of the internal flow field of the coal mill, and sending the ground coal powder from the separator to the boiler burner.

[0003] The existing coal mill dynamic and static ring structure adopts an integrated design, which is large in size and not convenient for installation and construction. When inspecting a local area, the entire dynamic and static ring needs to be disassembled, which affects the construction efficiency. At the same time, there is only one inclined cover plate on the upper part of the dynamic ring to form a one-way seal with the dynamic ring. The position of the inclined cover plate is fixed. As the wear progresses, the gap between the dynamic ring and the dynamic ring will gradually increase, resulting in serious air leakage in the later stage, affecting the normal operation of the coal mill. To this end, we propose a coal mill dynamic and static ring structure. Summary of the invention

[0004] The object of the present invention is to provide a coal mill dynamic and static ring structure that is convenient for improving the efficiency of disassembly and assembly of the dynamic ring and the sealing performance between the dynamic ring and the static ring, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a coal mill dynamic and static ring structure, comprising a mounting plate, a dynamic ring mechanism and a static ring mechanism, wherein the mounting plate is fixedly connected to the dynamic ring mechanism, wherein the dynamic ring mechanism comprises an inner baffle plate and an outer baffle plate installed on the mounting ring, wherein a plurality of groups of arc-shaped plates are evenly and fixedly connected between the inner baffle plate and the outer baffle plate, and an arc-shaped extrusion air passage is formed between adjacent arc-shaped plates, wherein the mounting ring is provided with a fixing member for controlling the fixing state between the inner baffle plate and the mounting ring, and wherein the fixing member is used to fix the inner baffle plate through the fixing member at the initial stage of the forward rotation of the mounting plate, and drive the inner baffle plate, the arc-shaped plate and the outer baffle plate to rotate synchronously together, and when the mounting plate rotates in the reverse direction The fixing state of the fixing part on the inner baffle plate is released when the fixing part is fixed to the inner baffle plate, thereby improving the disassembly efficiency. The static ring mechanism includes a static ring body fixedly installed inside the coal mill. The cross-section of the static ring body is L-shaped. A plurality of lifting grooves are evenly arranged on the side of the static ring body. A sealing ring that can contact the top of the outer baffle plate is slidably connected in the lifting groove. A driving part is provided inside the static ring body for linking the sealing ring to continuously contact downward when the outer baffle plate rotates. The driving part is used to drive the sealing ring to move downward when the outer baffle plate is running and rotating, so that the sealing ring can maintain a state of close contact with the top surface of the outer baffle plate, thereby improving the sealing performance and facilitating the improvement of the disassembly and assembly efficiency of the dynamic ring and the sealing performance between the dynamic ring and the static ring.

[0006] Preferably, the fixing part includes a plurality of groups of clamping plates evenly fixedly mounted on the outer wall of the mounting plate, a limit plate that can be clamped with the clamping plate is fixedly connected to the inner baffle plate, a plurality of storage cavities are evenly arranged in the mounting plate, the storage cavities are used to store hydraulic oil, a sliding plate for resisting the upper end of the limit plate is slidably connected in the storage cavity along the horizontal direction, and a pushing member is provided on the mounting plate for driving the sliding plate to slide out in the initial stage of the coal mill operation, so as to facilitate the control of the fixed state between the inner baffle plate and the mounting ring.

[0007] Preferably, the pushing member includes a driving ring rotatably connected to the mounting plate, a plurality of groups of arc grooves are evenly arranged on the upper side of the driving ring, a driving block slidably connected to the inner wall of the arc groove is fixedly connected to the bottom of the sliding plate, a driving frame connected to the coal mill drive shaft is fixedly connected to the driving ring, and a control member for controlling the limiting of the upper edge of the inner baffle plate when the sliding plate moves is provided on the mounting ring, so as to facilitate the sliding plate to slide out at the initial stage of the coal mill operation.

[0008] Preferably, the driving member includes a plurality of lifting blocks fixedly mounted on the sealing ring, the lifting blocks are slidably connected to the lifting groove in the vertical direction, a plurality of device grooves connected to the bottom end of the lifting groove are evenly arranged inside the static ring body, a sliding frame is slidably connected in the device groove in the horizontal direction, a roller and a wind wheel are rotatably connected to the sliding frame, the outer wall of the roller is rollingly connected to the outer wall of the wind wheel, a return spring fixedly connected to the device groove is fixedly connected to the sliding frame, and an adjusting member for improving the downward movement efficiency of the sealing ring is provided on the lifting block, so as to facilitate the linkage of the sealing ring to continuously resist downward when the outer baffle rotates.

[0009] Preferably, the control component includes multiple groups of control plates installed in the mounting ring, multiple groups of limit grooves are provided in the mounting ring, the control plate is slidably connected to the inner wall of the limit groove along the vertical direction, a delivery pipe connected to the bottom end of the limit groove is provided in the mounting ring, a delivery groove capable of connecting the bottom end of the delivery pipe with the storage cavity is provided on the sliding plate, and a clamping member for clamping the inner baffle plate when moving downward is provided on the control plate, so as to control the limiting of the upper edge of the inner baffle plate when the sliding plate moves.

[0010] Preferably, the connecting component includes a driving plate installed in the control board, a plug-in block is fixedly connected to the driving plate, a mounting groove that can be plugged into the control board is provided on the inner baffle plate, a plug-in groove that can be plugged into the plug-in block is provided in the mounting groove, and a moving component for controlling the moving state of the control board and the plug-in block when the sliding plate slides is provided in the control board, so as to facilitate the clamping of the inner baffle plate when moving downward.

[0011] Preferably, the moving part includes a tension spring fixedly mounted on the side of the driving plate, a sliding cavity is provided in the control plate, the driving plate is slidably connected to the inner wall of the sliding cavity in a horizontal direction, one end of the tension spring is fixedly connected to the sliding cavity, and a connecting pipe for connecting one end of the sliding cavity with the conveying pipe is provided in the control plate, so as to facilitate controlling the moving state of the control plate and the plug-in block when the sliding plate slides.

[0012] Preferably, the adjusting member includes a filter ring fixedly mounted on the upper side of the stationary ring body, the lifting block is provided with a conical hole, the stationary ring body is provided with an air intake pipe connected to the top of the lifting groove, the top of the air intake pipe is in contact with the bottom surface of the filter ring, so as to improve the downward movement efficiency of the sealing ring.

[0013] Preferably, the inner baffle plate, the outer baffle plate and the arc-shaped plate are all made of chromium-containing wear-resistant alloy material, using a uniquely formulated hard alloy material and advanced casting and heat treatment processes to extend the service life of the equipment.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The invention provides a coal mill dynamic and static ring structure, which solves the problems of the existing coal mill dynamic and static ring structure being fixed in structure, large in size, inconvenient to disassemble and assemble, and having poor sealing effect. The dynamic ring mechanism is composed of segmented splicing, which is usually divided into 12-20 segments according to actual conditions, which is convenient for installation, maintenance, and replacement. The shape of the arc plate is optimized, and the arc extrusion airway adopts the twisted extrusion airway with independent patent, which makes full use of the Venturi effect and the high-efficiency and low-resistance curved twisted airway shape simulated by the Bernoulli equation, optimizes the internal flow field of the coal mill, and can improve the mill. The ventilation output of the coal machine optimizes the primary air powder carrying capacity and the internal circulation of coal powder, reduces the internal blowing loss of the body, reduces the pressure difference of the coal mill, reduces the power consumption of the coal mill, and improves the sealing performance of the equipment during operation by setting up a static ring mechanism, reduces primary air leakage, improves the primary air powder delivery efficiency, improves the coal mill output, reduces the power consumption of coal milling and ventilation. At the same time, wear-resistant materials are used to increase the overall service life of the dynamic and static rings, and the optimization effect is guaranteed for a long time. The connection method is more scientific and firm, and it is convenient to disassemble and assemble, ensuring that the dynamic ring mechanism will not fall off due to vibration or other external forces during operation.

[0016] 2. A coal mill dynamic and static ring structure provided by the present invention, wherein the dynamic ring composed of an inner baffle plate, an arc plate and an outer baffle plate is placed on the outer wall of the mounting ring in sequence, the limit plate at the bottom is placed on the clamping plate for preliminary limiting, and at the same time, the top of the control board is plugged into and corresponds to the mounting groove, and multiple groups of inner baffle plates are placed in sequence, and the coal mill is started to run forward to drive the driving frame to rotate the driving ring, and the driving ring drives the arc groove, so that the driving block and the sliding plate are pushed, and the sliding plate slides out to block the upper side of the limit plate, and the limiting of the limit plate can be completed. At this time, the space in the storage chamber increases, and the pressure of the hydraulic oil decreases, and the hydraulic oil in the sliding chamber is pumped into the delivery pipe through the connecting pipe, and is input into the storage chamber through the delivery groove, so that the driving plate slides horizontally in the sliding chamber, and the plug-in block gradually extends to the upper side of the plug-in groove, and the tension spring is stretched, and then the pressure in the limit groove continues to decrease, so that the control board moves downward, and the plug-in block can be inserted into the plug-in groove, and the limiting of the top of the inner baffle is completed.

[0017] 3. The present invention provides a coal mill dynamic and static ring structure, in which the static ring body is fixedly installed to the inner wall of the coal mill, so that the roller of the static ring body rolls in contact with the outer edge of the outer baffle plate and is kept in a contact state by a reset spring. At this time, the bottom of the sealing ring falls to the upper side of the outer baffle plate for natural contact. When the outer baffle plate rotates, it drives the roller to rotate at high speed, thereby rotating the wind wheel. The wind wheel drives the gas to flow from top to bottom. During the downward flow of the airflow in the conical hole, it pushes the lifting block to move downward, thereby making the bottom of the sealing ring fit tightly with the top surface of the outer baffle plate, reducing gaps and improving sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the top surface structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the bottom structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the structure of the static ring mechanism of the present invention;

[0021] Figure 4 for Figure 3 A magnified image of the middle A area;

[0022] Figure 5 It is a schematic diagram of the partial structure of the dynamic ring mechanism of the present invention;

[0023] Figure 6 for Figure 5 Enlarged view of area B;

[0024] Figure 7 It is a schematic diagram of the partial structure of the pusher of the present invention;

[0025] Figure 8 for Figure 7 Enlarged view of area C in the middle;

[0026] Fig. 9 It is an exploded view of the local structure of the dynamic ring mechanism of the present invention;

[0027] Fig.10 It is a partial structural cross-sectional view of the dynamic ring mechanism of the present invention;

[0028] Fig.11 for Fig.10 Enlarged view of area D in the middle;

[0029] Fig.12 for Fig.11 Enlarged view of area E.

[0030] In the figure: 1-mounting plate; 2-mounting ring; 3-dynamic ring mechanism; 4-inner baffle; 5-outer baffle; 6-arc plate; 7-fixing member; 8-stationary ring mechanism; 9-stationary ring body; 10-lifting groove; 11-sealing ring; 12-driving member; 13-clamping plate; 14-limiting plate; 15-storage chamber; 16-sliding plate; 17-pushing member; 18-driving ring; 19-arc groove; 20-driving block; 21-driving frame; 22-control member; 23-lifting groove Lowering block; 24-installation slot; 25-sliding frame; 26-roller; 27-wind wheel; 28-reset spring; 29-adjusting member; 30-control board; 31-limiting slot; 32-delivery pipe; 33-delivery slot; 34-clamping member; 35-driving plate; 36-plug-in block; 37-installation slot; 38-plug-in slot; 39-moving member; 40-tension spring; 41-sliding cavity; 42-connecting pipe; 43-filter ring; 44-conical hole; 45-inlet pipe. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1-Figure 12 The present invention provides a technical solution: a coal mill dynamic and static ring structure, comprising a mounting plate 1, a dynamic ring mechanism 3 and a static ring mechanism 8, wherein the mounting plate 1 is fixedly connected with a mounting ring 2, the dynamic ring mechanism 3 comprises an inner baffle plate 4 and an outer baffle plate 5 mounted on the mounting ring 2, a plurality of groups of arc plates 6 are evenly and fixedly connected between the inner baffle plate 4 and the outer baffle plate 5, the inner baffle plate 4, the outer baffle plate 5 and the arc plates 6 are all made of chromium-containing alloy wear-resistant material, and an arc extrusion airway is formed between adjacent arc plates 6, a fixing member 7 for controlling the fixed state between the inner baffle plate 4 and the mounting ring 2 is provided on the mounting ring 2, and is used to fix the inner baffle plate 4 through the fixing member 7 at the initial stage of the forward rotation of the mounting plate 1, and drive the inner baffle plate 4, the arc plates 6 and the outer baffle plate 6 to rotate. The baffle plates 5 rotate synchronously, and when the mounting plate 1 rotates in the opposite direction, the fixing state of the fixing part 7 on the inner baffle plate 4 is released to improve the disassembly efficiency. The static ring mechanism 8 includes a static ring body 9 fixedly installed inside the coal mill. The cross-section of the static ring body 9 is L-shaped, and multiple groups of lifting grooves 10 are evenly arranged on the side of the static ring body 9. A sealing ring 11 that can contact the top of the outer baffle plate 5 is slidably connected in the lifting groove 10. A driving member 12 is provided inside the static ring body 9 for linking the sealing ring 11 to continuously contact downward when the outer baffle plate 5 rotates. When the outer baffle plate 5 is running and rotating, the sealing ring 11 is driven downward by the driving member 12, so that the sealing ring 11 can maintain a state of close contact with the top surface of the outer baffle plate 5, thereby improving the sealing performance.

[0033] The fixing member 7 includes a plurality of groups of snap-in plates 13 evenly fixedly mounted on the outer wall of the mounting plate 1, a limit plate 14 capable of snapping with the snap-in plate 13 is fixedly connected to the inner baffle plate 4, a plurality of storage chambers 15 are evenly arranged in the mounting plate 1, the storage chamber 15 is used to store hydraulic oil, a sliding plate 16 for resisting the upper end of the limit plate 14 is slidably connected in the storage chamber 15 along the horizontal direction, and a pushing member 17 for driving the sliding plate 16 to slide out in the initial stage of the coal mill operation is provided on the mounting plate 1.

[0034] The pusher 17 includes a drive ring 18 rotatably connected to the mounting plate 1, a plurality of arc grooves 19 are evenly arranged on the upper side of the drive ring 18, a drive block 20 slidably connected to the inner wall of the arc groove 19 is fixedly connected to the bottom of the sliding plate 16, a drive frame 21 connected to the coal mill drive shaft is fixedly connected to the drive ring 18, and a control member 22 for controlling the limiting of the upper edge of the inner baffle 4 when the sliding plate 16 moves is provided on the mounting ring 2.

[0035] The driving member 12 includes a plurality of lifting blocks 23 fixedly mounted on the sealing ring 11, the lifting blocks 23 are slidably connected to the lifting groove 10 in the vertical direction, a plurality of device grooves 24 connected to the bottom end of the lifting groove 10 are evenly arranged inside the static ring body 9, a sliding frame 25 is slidably connected in the horizontal direction in the device groove 24, a roller 26 and a wind wheel 27 are rotatably connected to the sliding frame 25, the outer wall of the roller 26 is rollingly connected to the outer wall of the wind wheel 27, a return spring 28 fixedly connected to the device groove 24 is fixedly connected to the sliding frame 25, an adjusting member 29 for improving the downward movement efficiency of the sealing ring 11 is provided on the lifting block 23, the adjusting member 29 includes a filter ring 43 fixedly mounted on the upper side of the static ring body 9, a conical hole 44 is provided on the lifting block 23, an air inlet pipe 45 connected to the top end of the lifting groove 10 is provided on the static ring body 9, and the top end of the air inlet pipe 45 is in conflict with the bottom surface of the filter ring 43.

[0036] The control member 22 includes a plurality of control panels 30 installed in the mounting ring 2. The mounting ring 2 is provided with a plurality of limit grooves 31. The control panel 30 is slidably connected to the inner wall of the limit groove 31 along the vertical direction. The mounting ring 2 is provided with a delivery pipe 32 connected to the bottom end of the limit groove 31. The sliding plate 16 is provided with a delivery groove 33 that can connect the bottom end of the delivery pipe 32 with the storage chamber 15. The control panel 30 is provided with a clamping member 34 for clamping the inner baffle plate 4 when moving downward.

[0037] The card connector 34 includes a drive plate 35 installed in the control board 30, and a plug-in block 36 is fixedly connected to the drive plate 35. A mounting groove 37 that can be plugged into the control board 30 is provided on the inner baffle plate 4, and a plug-in groove 38 that can be plugged into the plug-in block 36 is provided in the mounting groove 37. A moving member 39 for controlling the moving state of the control board 30 and the plug-in block 36 when the sliding plate 16 slides is provided in the control board 30. The moving member 39 includes a tension spring 40 fixedly installed on the side of the drive plate 35. A sliding cavity 41 is provided in the control board 30, and the drive plate 35 is slidably connected to the inner wall of the sliding cavity 41 in the horizontal direction. One end of the tension spring 40 is fixedly connected to the sliding cavity 41, and a connecting pipe 42 for connecting one end of the sliding cavity 41 with the conveying pipe 32 is provided in the control board 30.

[0038] In this embodiment, the dynamic ring mechanism 3 is composed of segmented splicing, which is usually divided into 12-20 segments according to actual conditions, which is convenient for installation, maintenance, and replacement. The shape of the arc plate 6 is optimized, and the arc extrusion air duct adopts the independently patented twisted extrusion air duct, which makes full use of the Venturi effect and the Bernoulli equation to simulate the high-efficiency and low-resistance curved torsion air duct shape, optimizes the internal flow field of the coal mill, can improve the ventilation output of the coal mill, optimize the primary air powder carrying capacity and the internal circulation of coal powder, reduce the internal blowing loss of the body, reduce the pressure difference of the coal mill, and reduce the power consumption of the coal mill.

[0039] By setting up the static ring mechanism 8, the sealing performance of the equipment during operation is improved, the leakage of primary air is reduced, the efficiency of primary air powder delivery is improved, the output of the coal mill is improved, the power consumption of coal milling and ventilation is reduced, and at the same time, wear-resistant materials are used to increase the overall service life of the dynamic and static rings, and the optimized effect is guaranteed for a long time. The connection method is more scientific and firm, and disassembly and assembly are convenient, ensuring that the dynamic ring mechanism 3 will not fall off due to vibration or other external forces during operation.

[0040] The dynamic ring composed of the inner baffle plate 4, the arc plate 6 and the outer baffle plate 5 is placed on the outer wall of the mounting ring 2 in sequence, and the limiting plate 14 at the bottom is placed on the clamping plate 13 for preliminary limiting. At the same time, the top of the control board 30 is plugged into the mounting groove 37 to correspond, and multiple groups of inner baffle plates 4 are placed in sequence. Figure 7 The middle driving ring 18 rotates clockwise for positive rotation and counterclockwise for reverse rotation. Starting the coal mill for positive operation drives the driving frame 21 to rotate the driving ring 18. The driving ring 18 drives the arc groove 19, so that the driving block 20 and the sliding plate 16 are pushed. The sliding plate 16 slides out to block the upper side of the limit plate 14, thereby completing the limiting of the limit plate 14, so that the limit plate 14 and the inner baffle plate 4 cannot swing up and down.

[0041] At the same time, during the process of the sliding plate 16 sliding out, the space in the storage chamber 15 increases and the pressure of the hydraulic oil decreases, and the hydraulic oil in the sliding chamber 41 is drawn into the delivery pipe 32 through the connecting pipe 42, and is input into the storage chamber 15 through the delivery groove 33, so that the driving plate 35 slides horizontally in the sliding chamber 41, and the plug-in block 36 gradually extends to the upper side of the plug-in groove 38, and the tension spring 40 is stretched. After that, the pressure in the limit groove 31 continues to decrease, so that the control plate 30 moves downward, and the plug-in block 36 can be inserted into the plug-in groove 38, completing the limitation of the top of the inner baffle 4, and controlling the drive by hydraulic oil is more stable and efficient.

[0042] Then, the stationary ring body 9 is fixedly installed on the inner wall of the coal mill, so that the roller 26 of the stationary ring body 9 is fitted and rolled with the outer edge of the outer baffle plate 5, and the return spring 28 is used to maintain the state of resistance. At this time, the bottom of the sealing ring 11 falls to the upper side of the outer baffle plate 5 for natural fit. When the outer baffle plate 5 rotates, it will drive the roller 26 to rotate at a high speed, thereby causing the wind wheel 27 to rotate. The wind wheel 27 drives the gas to flow from top to bottom. The airflow will push the lifting block 23 downward during the downward flow in the tapered hole 44, so that the bottom of the sealing ring 11 is in contact with the top of the outer baffle plate 5. The surfaces are closely fitted to reduce gaps and improve sealing performance. The airflow will be filtered by the filter ring 43 during transportation in the air intake pipe 45 to prevent coal powder from being transported downward. At the same time, the inner diameter of the air intake pipe 45 is extremely small, and is only used to provide a small amount of stable airflow to assist in improving the downward extrusion force of the sealing ring 11. Under the push of the return spring 28, one side of the roller 26 can always roll in contact with the outer wall of the outer baffle plate 5, and because the diameter of the roller 26 is much smaller than the outer diameter of the outer baffle plate 5, the rotation speed of the roller 26 is relatively fast, driving the wind wheel 27 to rotate at a high speed to generate a large wind pressure.

[0043] It is worth noting that: by controlling the drive ring 18 to rotate in the opposite direction, the drive block 20 is driven to slide in the arc groove 19 in the opposite direction, so that the sliding plate 16 can slide into the storage chamber 15 to squeeze the hydraulic oil, and the sliding plate 16 releases the blocking limit on the top of the limit plate 14, and the hydraulic oil enters the limit groove 31 through the delivery groove 33 and the delivery pipe 32, pushing the control plate 30 to move up, and the plug-in block 36 is released from the plug-in groove 38. The hydraulic pressure in the sliding cavity 41 increases, so that the drive plate 35 is pulled back by the tension spring 40, and the plug-in block 36 slides into the installation groove 37, which can simultaneously release the fixation of the surrounding inner baffles 4. When the outer baffle 5 stops rotating, the airflow stops being transported. At this time, the sealing ring 11 can be lifted upward, and the inner baffle 4 and the outer baffle 5 that need to be disassembled and repaired can be pulled out obliquely upward to complete the replacement. After that, the drive ring 18 is started again to rotate forward to complete the fixation, which greatly improves the efficiency of disassembly and assembly.

[0044] The surface of the dynamic ring mechanism is relatively flat, without screw holes, nuts and other holes and protrusions that are easy to accumulate coal ash. The internal fixing method is adopted to improve the cleanliness of the overall surface of the dynamic ring, which is convenient for subsequent cleaning.

[0045] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coal mill moving and static ring structure, characterized in that: include: A mounting plate, to which a mounting ring is fixedly connected; Also includes: The dynamic ring mechanism includes a plurality of inner baffles and an outer baffle installed on the mounting ring. A plurality of groups of arc plates are evenly and fixedly connected between the plurality of inner baffles and the outer baffles, and an arc-shaped extrusion airway is formed between adjacent arc plates. A fixing piece is provided on the mounting ring, which is used to fix the inner baffle through the fixing piece at the initial stage of the forward rotation of the mounting disk, and drive the inner baffle, the arc plate and the outer baffle to rotate synchronously together. When the mounting disk rotates in the reverse direction, the fixing state of the inner baffle by the fixing piece is released. The fixing piece includes a plurality of groups of clamping plates evenly and fixedly installed on the outer wall of the mounting disk. A limit plate capable of clamping with the clamping plate is fixedly connected to the inner baffle. The mounting ring is provided with a fixing piece, which is used to fix the inner baffle through the fixing piece at the initial stage of the forward rotation of the mounting disk, and drive the inner baffle, the arc plate and the outer baffle to rotate synchronously together. When the mounting disk rotates in the reverse direction, the fixing state of the inner baffle by the fixing piece is released. The fixing piece includes a plurality of groups of clamping plates evenly and fixedly installed on the outer wall of the mounting disk. A limit plate capable of clamping with the clamping plate is fixedly connected to the inner baffle. A plurality of storage chambers are evenly arranged in the disk, and the storage chambers are used to store hydraulic oil. A sliding plate for resisting the upper end of the limit plate is slidably connected in the storage chamber in the horizontal direction. A pushing member for driving the sliding plate to slide out in the initial operation of the coal mill is arranged on the mounting disk. The pushing member includes a driving ring rotatably connected to the mounting disk, and a plurality of arc grooves are evenly arranged on the upper side of the driving ring. A driving block slidably connected to the inner wall of the arc groove is fixedly connected to the bottom of the sliding plate, and a driving frame connected to the driving shaft of the coal mill is fixedly connected to the driving ring. A control member for limiting the upper edge of the inner baffle plate when the sliding plate moves is arranged on the mounting ring. The static ring mechanism includes a static ring body fixedly installed inside the coal mill. The cross-section of the static ring body is L-shaped. A plurality of lifting grooves are evenly arranged on the sides of the static ring body. A sealing ring that can contact the top of the outer baffle is slidably connected in the lifting groove. A driving member is provided inside the static ring body for linking the sealing ring to continuously contact downward when the outer baffle rotates. The driving member is used to drive the sealing ring to move downward when the outer baffle rotates, so that the sealing ring can maintain a state of close contact with the top surface of the outer baffle.

2. A coal mill moving and stationary ring structure according to claim 1, characterized in that: The driving part includes multiple groups of lifting blocks fixedly installed on the sealing ring, the lifting blocks are slidably connected to the lifting grooves in the vertical direction, multiple groups of installation grooves connected to the bottom ends of the lifting grooves are evenly arranged inside the static ring body, a sliding frame is slidably connected in the installation grooves in the horizontal direction, a roller and a wind wheel are rotatably connected to the sliding frame, the outer wall of the roller is rollingly connected to the outer wall of the wind wheel, a reset spring fixedly connected to the installation groove is fixedly connected to the sliding frame, and an adjusting part for improving the downward movement efficiency of the sealing ring is provided on the lifting block.

3. The coal mill moving and stationary ring structure according to claim 1, characterized in that: The control component includes multiple groups of control plates installed in the mounting ring. Multiple groups of limit grooves are provided in the mounting ring. The control plate is slidably connected to the inner wall of the limit groove along the vertical direction. A delivery pipe connected to the bottom end of the limit groove is provided in the mounting ring. A delivery groove that can connect the bottom end of the delivery pipe with the storage cavity is provided on the sliding plate. A clamping member is provided on the control plate for clamping the inner baffle plate when moving downward.

4. A coal mill moving and stationary ring structure according to claim 3, characterized in that: The card connector includes a driving plate installed in the control board, a plug-in block is fixedly connected to the driving plate, a mounting groove that can be plugged into the control board is provided on the inner baffle plate, a plug-in groove that can be plugged into the plug-in block is provided in the mounting groove, and a moving part is provided in the control board for controlling the moving state of the control board and the plug-in block when the sliding plate slides.

5. A coal mill moving and stationary ring structure according to claim 4, characterized in that: The moving part includes a tension spring fixedly installed on the side of the driving plate, a sliding cavity is opened in the control plate, the driving plate is slidably connected to the inner wall of the sliding cavity along the horizontal direction, one end of the tension spring is fixedly connected to the sliding cavity, and a connecting pipe is opened in the control plate for connecting one end of the sliding cavity with the conveying pipe.

6. The coal mill moving and stationary ring structure according to claim 2, characterized in that: The adjusting member comprises a filter ring fixedly mounted on the upper side of the static ring body, a conical hole is provided on the lifting block, an air inlet pipe connected to the top of the lifting slot is provided on the static ring body, and the top of the air inlet pipe contacts the bottom surface of the filter ring.

7. The coal mill moving and stationary ring structure according to claim 1, characterized in that: The inner baffle, the outer baffle and the curved plate are all made of chromium-containing alloy wear-resistant material.

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