Adjusting device based on dynamic and static rings of coal mill

Abstract

The utility model relates to the technical field of accessory devices of coal mills, in particular to an adjusting device based on dynamic and static rings of a coal mill, which can adjust a gap between a static ring arc-shaped block and a dynamic ring, and automatically press the static ring arc-shaped block downwards when the gap between the dynamic ring and the static ring arc-shaped block is increased, so that the dynamic ring and the static ring are prevented from being damaged. According to the adjusting device based on the dynamic and static rings of the coal mill, the grinding gap distance is not changed, so that the production quality and the production efficiency of the coal mill are improved, and the practicability is enhanced. Comprising a grinding disc frame, a coal grinding disc, an air ring, six groups of first screws, a movable ring, a static ring arc-shaped block, six groups of second screws and four groups of hydraulic rods, the top end of the grinding disc frame is connected with the coal grinding disc, six groups of first threaded holes are formed in the outer wall of the coal grinding disc, the air ring is slidably sleeved with the grinding disc, and six groups of first through holes are formed in the outer wall of the air ring; the six sets of first screws are in threaded connection with the first threaded holes through the six sets of first through holes correspondingly.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of coal mill accessory, particularly to a kind of adjusting device based on coal mill static ring. BACKGROUND

[0002] It is known that coal mill is the main equipment of coal-fired power plant pulverizing system, and the dynamic ring arc block structure is the important structure of coal mill to ensure normal pulverizing.In the working process of coal mill, the millstone is rotated by motor, and the material falls in the center of millstone through airlock feeder from the feed inlet, while hot air enters the mill from the air inlet.With the rotation of millstone, the material moves to the edge of millstone under the action of centrifugal force, and is crushed by the mill roller when passing through annular groove on millstone, and the crushed material is blown by primary air around the mill ring through dynamic ring, and large particles directly fall on the millstone to be crushed again.The material in airflow falls to the millstone to be ground again through the upper separator under the action of rotating rotor, and qualified fine powder is discharged with airflow, and is collected by dust collection device, which is the product.

[0003] The static ring arc block of coal mill is fixedly installed on the shell support, and the dynamic ring is connected with the millstone and rotates together, and there is a certain gap between the dynamic ring arc block and the static ring arc block, but the gap between the dynamic ring arc block and the static ring arc block increases due to the wear of the dynamic ring arc block and the static ring arc block after a period of operation of the dynamic ring arc block structure, which affects the output of coal mill and the working efficiency and quality of coal mill, thereby poor practicability. CONTENT OF UTILITY MODEL

[0004] To solve the above technical problems, the adjusting device based on coal mill dynamic and static ring can adjust the gap between the static ring arc block and the dynamic ring, and automatically press the static ring arc block downward when the gap between the dynamic ring and the static ring arc block increases, so as to ensure that the grinding gap distance does not change, thereby improving the production quality and efficiency of coal mill, and enhancing the practicability.

[0005] The utility model discloses a kind of adjusting device based on coal mill moving and static ring, including millstone frame, grinding disc, wind ring, six groups of first screw, moving ring, static ring arc block, six groups of second screw and four groups of hydraulic rod, the top of millstone frame is connected with grinding disc, six groups of first thread hole are provided on the outer wall of grinding disc, wind ring is slidably sleeved with millstone, six groups of first through hole are provided on the outer wall of wind ring, six groups of first screw are respectively connected in screw thread with first thread hole by six groups of first through hole, the top of millstone frame is provided with six groups of second thread hole, the top of moving ring is provided with six groups of second through hole, six groups of second screw are respectively connected in screw thread with second thread hole by second through hole, the bottom of millstone is provided with gap adjustment assembly, the top of six groups of static ring arc block is connected with compression assembly, the left end and the right end of six groups of static ring arc block are tightly formed into annular, the bottom of six groups of static ring arc block is respectively provided with clamping frame, clamping frame is slidably clamped with moving ring, compression assembly is arranged in support assembly, the top of support assembly is connected with four groups of hydraulic rod.

[0006] Preferably, gap adjustment assembly includes six groups of electric cylinders, the bottom of grinding disc is provided with six groups of mounting groove, the top of six groups of mounting groove is respectively connected with electric cylinder and six groups of support block, the bottom of six groups of mounting groove is respectively provided with cover plate assembly, the top of six groups of electric cylinders is respectively provided with pneumatic rod, the top of millstone is provided with six groups of first through groove, the top of moving ring is provided with six groups of second through groove, six groups of pneumatic rod are respectively inserted into first through groove, the top of six groups of pneumatic rod is respectively connected with support block, six groups of support block are respectively slidably sleeved with first through groove and second through groove.

[0007] Preferably, cover plate assembly includes six groups of cover plate and twelve groups of third screw, the bottom of six groups of mounting groove is respectively provided with hidden groove, the bottom of six groups of hidden groove is respectively provided with two groups of third thread hole, the bottom of six groups of cover plate is respectively provided with two groups of third through hole, twelve groups of third screw are respectively connected in screw thread with third thread hole by third through hole.

[0008] Preferably, support frame assembly top plate, mounting frame, four groups of mounting block and four groups of fourth screw, the top of top plate is provided with four groups of fourth through hole, the top of mounting frame is provided with four groups of fourth thread hole, four groups of fourth screw are respectively connected in screw thread with fourth thread hole by fourth through hole, the outer wall of mounting frame is connected with four groups of mounting block, the top of top plate is connected with four groups of hydraulic rod.

[0009] Preferably, the pressing assembly comprises twelve sets of threaded slide rods, six sets of first pressing blocks and six sets of second pressing blocks, the top end of the mounting frame is provided with six sets of pressing grooves, the bottom end of the top plate is connected with the twelve sets of threaded slide rods, the top end of the six sets of static ring arc blocks is connected with the first pressing blocks and the second pressing blocks respectively, the six sets of first pressing blocks and the six sets of second pressing blocks are clamped through the sliding clamping assembly, the top end of the six sets of first pressing blocks and the six sets of second pressing blocks is connected with the limiting blocks respectively, the top end of the six sets of first pressing blocks and the six sets of second pressing blocks is provided with the first sliding hole respectively, the twelve sets of threaded slide rods are slidably sleeved with the first sliding blocks respectively, and the outer wall of the twelve sets of threaded slide rods is provided with the springs respectively.

[0010] Preferably, the twelve sets of threaded slide rods are threadedly connected with the limiting nuts respectively.

[0011] Preferably, the sliding clamping assembly comprises six sets of clamping sliding blocks, the left end of the six sets of first pressing blocks is connected with the clamping sliding blocks respectively, the right end of the six sets of second pressing blocks is provided with the clamping sliding grooves respectively, and the six sets of clamping sliding blocks are slidably clamped with the clamping sliding grooves respectively.

[0012] Preferably, the six sets of first penetrating holes, the six sets of second penetrating holes, the eight sets of third penetrating holes and the four sets of fourth penetrating holes are all provided as counterbores.

[0013] Compared with the prior art, the utility model has the advantages that first, the support assembly and the four sets of hydraulic rods preliminarily fix and install the six sets of static ring arc blocks, the support assembly is driven to move downwards by the upper device, so that the static ring arc blocks are tightly attached to the moving ring, then the gap adjusting assembly is used to adjust the grinding gap, and when the support blocks are worn, the pneumatic rod is adjusted to move upwards by the electric cylinder, so that the support blocks are driven to move upwards to support the static ring arc blocks, and then when the static ring arc blocks and the moving ring are worn, the static ring arc blocks are pressed downwards by the pressing assembly, so that the distance of the grinding gap is ensured, thereby improving the production quality and production efficiency of the coal mill. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is the connecting structure schematic view of the utility model;

[0015] Fig. 2 It is the connecting structure schematic view of the grinding disc holder and the grinding disc of the utility model;

[0016] Fig. 3 It is the A local enlarged structure schematic view of the utility model;

[0017] Fig. 4 It is the B local enlarged structure schematic view of the utility model;

[0018] Markings in the attached figure: 1. Grinding disc frame; 2. Coal grinding disc; 3. Air ring; 4. First screw; 5. Dynamic ring; 6. Static ring arc block; 7. Second screw; 8. Hydraulic rod; 9. Electric cylinder; 10. Pneumatic rod; 11. Support block; 12. Cover plate; 13. Third screw; 14. Top plate; 15. Mounting frame; 16. Mounting block; 17. Fourth screw; 18. Threaded slide rod; 19. First clamping block; 20. Second clamping block; 21. Spring; 22. Limit block; 23. Limit nut; 24. Clip-on slider. DETAILED DESCRIPTION

[0019] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0020] like Figs. 1 to 4 As shown, the utility model is an adjustment device based on the dynamic and static ring of the coal mill, comprising a grinding disc frame 1, a coal mill disc 2, an air ring 3, six groups of first screws 4, a dynamic ring 5, a static ring arc block 6, six groups of second screws 7 and four groups of hydraulic rods 8. The top of the grinding disc frame 1 is connected to the coal mill disc 2, and six groups of first threaded holes are provided on the outer wall of the coal mill disc 2. The air ring 3 is slidably fitted on the grinding disc, and six groups of first through holes are provided on the outer wall of the air ring 3. The six groups of first screws 4 are respectively threadedly connected to the first threaded holes through the six groups of first through holes. The top of the grinding disc frame 1 is provided with six groups of second threaded holes, and the top of the dynamic ring 5 is provided with six groups of second through holes. The six groups of second screws 7 are respectively threadedly connected to the second threaded holes through the second through holes. A gap adjustment component is provided at the bottom end of the grinding disc. The left and right ends of the six groups of static ring arc blocks are tightly attached to form a circular ring. The bottom ends of the six groups of static ring arc blocks 6 are respectively provided with a clamping frame, which is slidably clamped with the dynamic ring 5. The top ends of the six groups of static ring arc blocks 6 are connected to the clamping assembly, which is arranged in the bracket assembly, and the top end of the bracket assembly is connected to the four groups of hydraulic rods 8; first, the support assembly and the four groups of hydraulic rods preliminarily fix and install the positions of the six groups of static ring arc blocks, and the support assembly is driven downward by the upper device to make the static ring arc blocks close to the dynamic ring, and then the grinding gap is adjusted by the gap adjustment assembly. When the support block is worn, the pneumatic rod can be adjusted to move upward by the electric cylinder, so as to drive the support block to move upward by the pneumatic rod to support the static ring arc block. After that, after the static ring arc block and the dynamic ring are worn, the static ring arc block is squeezed downward by the clamping assembly, and the static ring arc block is pressed downward by two groups of threaded sliders and springs, so that the static ring arc block is always close to the support block, thereby ensuring the distance of the grinding gap, thereby improving the production quality and production efficiency of the coal mill.

[0021] As the preferred of the above embodiment, the gap adjusting assembly comprises six sets of electric cylinders 9, the bottom end of the grinding disc 2 is provided with six sets of mounting grooves, the top end of the six sets of mounting grooves is respectively connected with the electric cylinders 9 and six sets of supporting blocks 11, the bottom end of the six sets of mounting grooves is respectively provided with the cover plate 12 assembly, the top end of the six sets of electric cylinders 9 is respectively provided with the pneumatic rod 10, the top end of the grinding disc is provided with six sets of first through grooves, the top end of the movable ring 5 is provided with six sets of second through grooves, the six sets of pneumatic rods 10 are respectively inserted into the first through grooves, the top end of the six sets of pneumatic rods 10 is respectively connected with the supporting blocks 11, and the six sets of supporting blocks 11 are respectively and slidingly sleeved with the first through grooves and the second through grooves; the six sets of pneumatic rods can be supported and lifted by the six sets of electric cylinders, so that the height of the supporting blocks is adjusted, and the gap between the movable ring and the static ring is adjusted, thereby enhancing the practicability.

[0022] As the preferred of the above embodiment, the cover plate 12 assembly comprises six sets of cover plates 12 and twelve sets of third screws 13, the bottom end of the six sets of mounting grooves is respectively provided with a hidden groove, the bottom end of the six sets of hidden grooves is respectively provided with two sets of third threaded holes, the bottom end of the six sets of cover plates 12 is respectively provided with two sets of third through holes, and the twelve sets of third screws 13 are respectively and threadedly connected with the third through holes and the third threaded holes; the mounting grooves can be sealed by the six sets of cover plates and the twelve sets of third screws, so that the electric cylinders are protected and the bottom is supported, and the later maintenance and maintenance are facilitated, thereby enhancing the practicability.

[0023] As the preferred of the above embodiment, the supporting frame assembly comprises a top plate 14, a mounting frame 15, four sets of mounting blocks 16 and four sets of fourth screws 17, the top end of the top plate 14 is provided with four sets of fourth through holes, the top end of the mounting frame 15 is provided with four sets of fourth threaded holes, the four sets of fourth screws 17 are respectively and threadedly connected with the fourth through holes and the fourth threaded holes, the mounting frame 15 is connected with the four sets of mounting blocks 16 on the outer wall thereof, and the top end of the top plate 14 is connected with the four sets of hydraulic rods 8; the mounting frame and the equipment shell can be connected and fixed by the four sets of mounting blocks, so that the static ring arc-shaped blocks are fixed later, thereby enhancing the practicability.

[0024] As the preferred of the above embodiment, the pressing assembly comprises twelve sets of threaded slide rods 18, six sets of first pressing blocks 19 and six sets of second pressing blocks 20, the top end of the mounting frame 15 is provided with six sets of pressing grooves, the bottom end of the top plate 14 is connected with the twelve sets of threaded slide rods 18, the top end of the six sets of static ring arc blocks 6 is respectively connected with the first pressing block 19 and the second pressing block 20, the six sets of first pressing blocks 19 and the six sets of second pressing blocks 20 are clamped through the sliding clamping assembly, the top end of the six sets of first pressing blocks 19 and the six sets of second pressing blocks 20 is respectively connected with the limiting block 22, the top end of the six sets of first pressing blocks 19 and the six sets of second pressing blocks 20 is respectively provided with a first sliding hole, the twelve sets of threaded slide rods 18 are respectively sleeved with the first sliding block, and the outer wall of the twelve sets of threaded slide rods 18 is respectively provided with a spring 21; when the static ring arc block or the dynamic ring is worn, the spring drives the first pressing block or the second pressing block to move downward, so that the static ring arc block can always maintain a certain gap with the dynamic ring, so as to ensure the grinding quality and production efficiency, thereby enhancing the practicability.

[0025] As the preferred of the above embodiment, the twelve sets of threaded slide rods 18 are respectively screwed with the limiting nuts 23; the spring can be compressed through the limiting nut, so as to ensure the downward pressure of the spring, so as to ensure that the static ring arc block is always close to the supporting block, thereby enhancing the practicability.

[0026] As the preferred of the above embodiment, the sliding clamping assembly comprises six sets of clamping sliding blocks 24, the left end of the six sets of first pressing blocks 19 is respectively connected with the clamping sliding block, the right end of the six sets of second pressing blocks 20 is respectively provided with a clamping sliding groove, and the six sets of clamping sliding blocks 24 are respectively slidably clamped with the clamping sliding groove; the introduction of the sliding clamping assembly simplifies the close contact between the static ring arc blocks, and improves the maintenance efficiency during the assembly and disassembly process of the connecting piece, while ensuring the tightness of the connection, preventing loosening phenomenon in high-speed operation, thereby enhancing the practicability.

[0027] As the preferred of the above embodiment, the six sets of first penetrating holes, the six sets of second penetrating holes, the twelve sets of third penetrating holes and the four sets of fourth penetrating holes are all provided as counterbores; the six sets of first screws, the six sets of second screws, the twelve sets of third screws and the four sets of fourth screws can be hidden through the counterbores, thereby preventing the top of the screw from being worn, and thus enhancing the practicability.

[0028] The utility model discloses a kind of adjusting device based on coal mill static and dynamic ring, its working principle is, when working, first, static ring arc block is supported and the preliminary fixation of position by four groups of hydraulic rod, dynamic ring is connected with coal mill disc by millstone frame, and both form initial grinding gap, drive pneumatic rod by electric cylinder, drive support block to move up and down, to finely adjust the grinding gap between static ring and dynamic ring, ensure the best coal milling effect, this process can be dynamically adjusted according to wear condition at any time, to maintain constant grinding efficiency, with equipment operation, dynamic ring and static ring arc block will gradually wear, at this time, electric cylinder continues to play a role, by adjusting the height of pneumatic rod, support block moves upwards, compensate the gap increase caused by wear, ensure that grinding effect is not affected, when static ring arc block or dynamic ring wears, spring and threaded slide bar in compression assembly work cooperatively, by first compression block and second compression block downwardly exert pressure, ensure that static ring arc block and dynamic ring keep close contact, even in wear condition also can maintain stable grinding gap, when equipment maintenance, by the opening of cover plate assembly, electric cylinder can be easily accessed to check and repair, simultaneously, by the cooperation of threaded slide bar and limit nut, the pressure of spring can be adjusted, to adapt to different wear degree, ensure long-term stable operation.

[0029] The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are for illustrative purposes only.

[0030] The "first", "second", "third" in the utility model do not represent the specific quantity and order, just for the name of distinction.

[0031] The above is only preferred embodiment of the utility model, it should be pointed out, for ordinary skilled person in the art, without departing from the technical principle of the utility model, can make several improvements and variations, these improvements and variations also should be regarded as the protection scope of the utility model.

Claims

1. An adjustment device based on the dynamic and static rings of a coal mill, characterized in that: The invention comprises a grinding disc frame (1), a coal grinding disc (2), an air ring (3), six groups of first screws (4), a dynamic ring (5), a static ring arc block (6), six groups of second screws (7) and four groups of hydraulic rods (8). The top of the grinding disc frame (1) is connected to the coal grinding disc (2). Six groups of first threaded holes are provided on the outer wall of the coal grinding disc (2). The air ring (3) is slidably fitted with the grinding disc. Six groups of first through holes are provided on the outer wall of the air ring (3). The six groups of first screws (4) are respectively threadedly connected to the first threaded holes through the six groups of first through holes. The top of the grinding disc frame (1) is provided with There are six groups of second threaded holes, the top of the dynamic ring (5) is provided with six groups of second through holes, and the six groups of second screws (7) are respectively threadedly connected to the second threaded holes through the second through holes. The bottom end of the grinding disc is provided with a gap adjustment component, the top of the six groups of static ring arc blocks (6) are connected to the clamping component, the left end and the right end of the six groups of static ring arc blocks are tightly attached to form a circular ring, and the bottom ends of the six groups of static ring arc blocks (6) are respectively provided with a clamping frame, the clamping frame and the dynamic ring (5) are slidably clamped, the clamping component is provided in the bracket component, and the top of the bracket component is connected to the four groups of hydraulic rods (8).

2. The regulating device based on the moving and static rings of the coal mill according to claim 1, characterized in that: The gap adjustment assembly comprises six groups of electric cylinders (9), six groups of mounting grooves are provided at the bottom end of the coal grinding disc (2), the top ends of the six groups of mounting grooves are respectively connected to the electric cylinders (9) and six groups of support blocks (11), the bottom ends of the six groups of mounting grooves are respectively provided with cover plate (12) assemblies, the top ends of the six groups of electric cylinders (9) are respectively provided with pneumatic rods (10), the top ends of the grinding disc are provided with six groups of first through-grooves, the top ends of the dynamic ring (5) are provided with six groups of second through-grooves, the six groups of pneumatic rods (10) are respectively inserted into the first through-grooves, the top ends of the six groups of pneumatic rods (10) are respectively connected to the support blocks (11), and the six groups of support blocks (11) are respectively slidably fitted with the first through-grooves and the second through-grooves.

3. The regulating device based on the moving and static rings of the coal mill according to claim 2, characterized in that: The cover plate (12) assembly includes six groups of cover plates (12) and twelve groups of third screws (13), the bottom ends of the six groups of mounting grooves are respectively provided with hidden grooves, the bottom ends of the six groups of hidden grooves are respectively provided with two groups of third threaded holes, the bottom ends of the six groups of cover plates (12) are respectively provided with two groups of third through holes, and the twelve groups of third screws (13) are respectively threadedly connected to the third threaded holes through the third through holes.

4. The regulating device based on the moving and static rings of the coal mill according to claim 3, characterized in that: The support frame assembly comprises a top plate (14), a mounting frame (15), four groups of mounting blocks (16) and four groups of fourth screws (17). The top of the top plate (14) is provided with four groups of fourth through holes, the top of the mounting frame (15) is provided with four groups of fourth threaded holes, the four groups of fourth screws (17) are respectively threadedly connected to the fourth threaded holes through the fourth through holes, the outer wall of the mounting frame (15) is connected to the four groups of mounting blocks (16), and the top of the top plate (14) is connected to the four groups of hydraulic rods (8).

5. The regulating device based on the moving and static rings of the coal mill according to claim 4, characterized in that: The clamping assembly includes twelve groups of threaded slide rods (18), six groups of first clamping blocks (19) and six groups of second clamping blocks (20). The top of the mounting frame (15) is provided with six groups of clamping grooves. The bottom end of the top plate (14) is connected to the twelve groups of threaded slide rods (18). The top ends of the six groups of static ring arc blocks (6) are respectively connected to the first clamping block (19) and the second clamping block (20). The six groups of first clamping blocks (19) and the six groups of second clamping blocks (20) are clamped by a sliding clamping assembly. The top ends of the six groups of first clamping blocks (19) and the six groups of second clamping blocks (20) are respectively connected to the limit blocks (22). The top ends of the six groups of first clamping blocks (19) and the six groups of second clamping blocks (20) are respectively provided with first sliding holes. The twelve groups of threaded slide rods (18) are respectively slidably fitted with the first slider. The outer walls of the twelve groups of threaded slide rods (18) are respectively provided with springs (21).

6. The regulating device based on the moving and static rings of the coal mill according to claim 5, characterized in that: The twelve component threaded slide rods (18) are respectively threadedly connected to the limiting nuts (23).

7. The regulating device based on the moving and static rings of the coal mill according to claim 6, characterized in that: The sliding clamping assembly comprises six groups of clamping slide blocks (24), the left ends of the six groups of first pressing blocks (19) are respectively connected to the clamping slide blocks, the right ends of the six groups of second pressing blocks (20) are respectively provided with clamping slots, and the six groups of clamping slide blocks (24) are respectively slidably clamped with the clamping slots.

8. The regulating device based on the moving and static rings of the coal mill according to claim 7, characterized in that: The six groups of first through holes, the six groups of second through holes, the eight groups of third through holes and the four groups of fourth through holes are all configured as countersunk holes.

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