Sealing structure for coal mill

Abstract

The utility model provides a sealing structure for a coal mill. The sealing structure comprises a pull rod arranged in an inner cavity of a sealing shell; the first sealing rings are arranged at the top and the bottom of the pull rod; the number of the first sealing rings is two, sealing assemblies are fixedly installed at the top and the bottom of an inner cavity of the sealing shell correspondingly, a pushing assembly is movably connected to the front side of the inner cavity of the sealing shell, connecting rings are fixedly installed at the top and the bottom of the pushing assembly correspondingly, and first sealing rings are installed on one sides of the connecting rings; and a second sealing ring is arranged on one side of the connecting ring. Through the design of the sealing assembly and the pushing assembly, a sealing ring and a sealing gasket are extruded through a connecting ring, so that the sealing gasket is fully attached to the surface of the pull rod, the sealing gasket and the pull rod are attached more tightly, and therefore the sealing effect is improved, air or dust is prevented from entering the sealing shell, and the phenomena of powder leakage and pull rod abrasion are reduced; and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of coal mill technology, and more specifically, to a sealing structure for a coal mill. Background Technology

[0002] A coal mill is a piece of equipment used for preparing coal powder. It is mainly used in steel plants and industrial power plants. Coal mills are widely used in the power and coal industries. Their sealing performance directly affects the equipment's operating efficiency, energy consumption, and environmental safety. Traditional coal mill sealing structures have many defects.

[0003] During operation, the existing coal mill tie rods are exposed to the harsh environment of high-temperature coal dust for extended periods. Due to the scouring and erosion caused by the high-temperature coal dust, the seals are easily damaged, leading to frequent coal dust leakage. This leaked coal dust continuously wears down the tie rod. As the tie rod moves, the powdery material also enters the lower seal along the tie rod. Once inside the lower seal, the powdery material exacerbates its wear, reducing its sealing performance and ultimately causing further leakage of the powdery material.

[0004] Therefore, we have made improvements to this and proposed a sealing structure for coal mills. Utility Model Content

[0005] The purpose of this utility model is as follows: In the operation of existing coal mill tie rods, the sealing components are constantly exposed to the harsh environment of high-temperature coal powder. Due to the scouring and erosion of the high-temperature coal powder, the sealing components are easily damaged, resulting in frequent powder leakage. This leaked coal powder will continuously wear down the tie rod. As the tie rod moves, the powdery material will also enter the lower sealing component along the tie rod. After the powdery material enters the lower sealing component, it will aggravate the wear of the lower sealing component, leading to a decrease in its sealing performance, and ultimately causing further leakage of powdery material.

[0006] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0007] A sealing structure is used in the coal mill to improve the above problems.

[0008] The application is as follows:

[0009] It includes: a pull rod installed in the inner cavity of the sealed housing; a first sealing ring installed at the top and bottom of the pull rod; the number of the first sealing rings is set to two; a sealing assembly is fixedly installed at the top and bottom of the inner cavity of the sealed housing; a pushing assembly is movably connected to the front side of the inner cavity of the sealed housing; a connecting ring is fixedly installed at the top and bottom of the pushing assembly; a first sealing ring is installed on one side of the connecting ring; and a second sealing ring is installed on one side of the connecting ring.

[0010] To achieve the above technical solution, the design of the sealing component and the pushing component utilizes the connecting ring to compress the sealing ring and the sealing gasket, ensuring that the sealing gasket fully adheres to the surface of the pull rod. This results in a tighter fit between the sealing gasket and the pull rod, thereby increasing the sealing effect, preventing air or dust from entering the sealing housing, reducing powder leakage and wear on the pull rod, and improving production efficiency.

[0011] As a preferred embodiment of the sealing structure for coal mills provided by this utility model, the sealing assembly includes a sealing shell, two sealing shells are respectively fixedly installed on the top and bottom of the sealing shell, the inner cavity of the sealing shell is provided with a first sealing groove, the inner cavity of the sealing shell is provided with a second sealing groove, the inner cavity of the sealing shell is provided with a first sealing gasket, the inner cavity of the sealing shell is provided with a second sealing gasket, and the inner cavity of the sealing shell is provided with a third sealing gasket.

[0012] To achieve the above technical solution, the two connecting rings are moved in opposite directions by the pushing component. When the connecting rings move, the first sealing ring and the second sealing ring squeeze the first sealing gasket, the second sealing gasket, and the third sealing gasket. The sealing gasket is fully adhered to the surface of the pull rod by the connecting ring and the sealing ring, making the sealing gasket fit more tightly with the pull rod, thereby increasing the sealing effect, preventing air or dust from entering the sealing housing, reducing powder leakage and wear on the pull rod, and improving production efficiency.

[0013] As a preferred embodiment of the sealing structure for coal mills provided by this utility model, a second sealing ring is installed on the surface of the sealing shell, and the side of the second sealing ring near the sealing shell is fixedly connected to the sealing shell.

[0014] To achieve the above technical solution, the design of the second sealing ring improves the sealing effect when the sealing shell is connected to the sealing housing.

[0015] In a preferred embodiment of the sealing structure for a coal mill provided by this utility model, the pushing assembly includes a rotating rod movably connected to the front side of the inner cavity of the sealing housing. A rotating disk is fixedly installed on the front side of the rotating rod. A worm gear is fixedly installed on the surface of the rotating rod. A worm wheel meshes with the bottom of the worm gear. A bidirectional lead screw is fixedly installed in the inner cavity of the worm wheel. Fixed blocks are threaded to both sides of the surface of the bidirectional lead screw. A connecting plate is fixedly installed on the rear side of the fixed block. A support block is fixedly installed on the rear side of the connecting plate. Arc-shaped blocks are fixedly installed on the top and bottom of the support blocks. Inclined plates are movably connected to opposite sides of the two arc-shaped blocks. Support plates are fixedly installed on opposite sides of the two inclined plates. A support disk is fixedly installed between opposite sides of the two support plates. One side of the support disk is fixedly connected to one side of the connecting ring. A connecting rod is fixedly installed on one side of the support plate. A protective shell is installed on the surface of the connecting rod. A spring is fixedly installed on one side of the connecting rod. The side of the spring closest to the protective shell is fixedly connected to the protective shell.

[0016] To achieve the above technical solution, when it is necessary to move the two connecting rings, the rotating disk is rotated. When the rotating disk rotates, it drives the rotating rod to rotate. When the rotating rod rotates, it drives the worm gear to rotate. When the worm gear rotates, it drives the double-acting screw to rotate. When the double-acting screw rotates, it drives the two fixed blocks to move relative to each other. When the fixed blocks move, they drive the support block to move through the connecting plate. When the support block moves, it drives the arc-shaped block to move. When the arc-shaped block moves, it presses against the inclined plate, driving the support plate to move. When the support plate moves, it drives the support disc to move. When the two support discs move, they drive the two connecting rings to move in opposite directions, thereby achieving a seal on the tie rod.

[0017] In a preferred embodiment of the sealing structure for a coal mill provided by this utility model, a movable block is movably connected to the rear side of the rotating rod, and the movable block is fixedly connected to the sealing shell on the side near the sealing shell.

[0018] In a preferred embodiment of the sealing structure for a coal mill provided by this utility model, a sliding block is fixedly installed on the rear side of the support block, and a sliding rod is slidably connected to the inner cavity of the sliding block. Both sides of the sliding rod are fixedly installed in the inner cavity of the sealing shell.

[0019] In a preferred embodiment of the sealing structure for a coal mill provided by this utility model, positioning blocks are fixedly installed on both the front and rear sides of the support plate, and a positioning rod is slidably connected to the inner cavity of the positioning block. The side of the positioning rod closest to the sealing shell is fixedly connected to the sealing shell.

[0020] As a preferred embodiment of the sealing structure for coal mills provided by this utility model, a fixing ring is sleeved on the surface of the protective shell, and the fixing ring is fixedly connected to the sealing shell on the side near the sealing shell.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] This utility model provides a sealing structure for a coal mill, comprising: a pull rod installed in the inner cavity of a sealing housing; first sealing rings installed at the top and bottom of the pull rod; two first sealing rings are provided; sealing components are fixedly installed at the top and bottom of the inner cavity of the sealing housing; a pushing component is movably connected to the front side of the inner cavity of the sealing housing; connecting rings are fixedly installed at the top and bottom of the pushing component; a first sealing ring is installed on one side of the connecting ring, and a second sealing ring is installed on the other side of the connecting ring. Through the design of the sealing component and the pushing component, the connecting ring compresses the sealing ring and the sealing gasket, ensuring that the sealing gasket fully adheres to the surface of the pull rod, resulting in a tighter fit between the sealing gasket and the pull rod. This enhances the sealing effect, prevents air or dust from entering the inner cavity of the sealing housing, reduces powder leakage and wear on the pull rod, and improves production efficiency. Attached Figure Description

[0023] Figure 1 A schematic diagram of the sealing structure for a coal mill provided in this application;

[0024] Figure 2 This is a schematic front sectional view of the sealing structure for a coal mill provided in this application;

[0025] Figure 3 A front sectional view of the sealing assembly for the sealing structure of the coal mill provided in this application;

[0026] Figure 4 This is a front sectional view of the push assembly of the sealing structure for a coal mill provided in this application.

[0027] The image shows:

[0028] 1. Sealing housing; 2. Pull rod; 3. First sealing ring; 4. Sealing assembly; 401. Sealing outer shell; 402. First sealing groove; 403. Second sealing groove; 404. First sealing gasket; 405. Second sealing gasket; 406. Third sealing gasket; 407. Second sealing ring; 5. Pushing assembly; 501. Rotating rod; 502. Rotating disk; 503. Worm gear; 504. Worm wheel; 505. Double-acting lead screw; 506. 507. Fixed block; 508. Connecting plate; 509. Support block; 510. Arc block; 511. Inclined plate; 512. Support plate; 513. Support plate; 514. Connecting rod; 515. Protective shell; 516. Spring; 517. Movable block; 518. Sliding block; 519. Sliding rod; 520. Positioning block; 521. Positioning rod; 522. Fixed ring; 6. Connecting ring; 7. First sealing ring; 8. Second sealing ring. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0030] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely to illustrate some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0031] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] In the description of this utility model, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this utility model 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 on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0035] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0036] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0037] Please refer to Figure 1-4 A sealing structure for a coal mill includes: a pull rod 2 installed in the inner cavity of a sealing housing 1; a first sealing ring 3 installed at the top and bottom of the pull rod 2; the number of first sealing rings 3 is set to two; a sealing assembly 4 is fixedly installed at the top and bottom of the inner cavity of the sealing housing 1; a pushing assembly 5 is movably connected to the front side of the inner cavity of the sealing housing 1; a connecting ring 6 is fixedly installed at the top and bottom of the pushing assembly 5; a first sealing ring 7 is installed on one side of the connecting ring 6; and a second sealing ring 8 is installed on one side of the connecting ring 6.

[0038] Please refer to Figure 2 and Figure 3 The sealing assembly 4 includes a sealing housing 401. Two sealing housings 401 are fixedly installed on the top and bottom of the sealing housing 1, respectively. A first sealing groove 402 and a second sealing groove 403 are formed in the inner cavity of the sealing housing 401. A first sealing gasket 404, a second sealing gasket 405, and a third sealing gasket 406 are installed in the inner cavity of the sealing housing 401. A second sealing ring 407 is installed on the surface of the sealing housing 401, and the side of the second sealing ring 407 closest to the sealing housing 1 is fixedly connected to the sealing housing 1. By pushing component 5, the two connecting rings 6 are moved in opposite directions. When the connecting rings 6 move, the first sealing ring 7 and the second sealing ring 8 squeeze the first sealing gasket 404, the second sealing gasket 405 and the third sealing gasket 406. By using the connecting rings 6 and the sealing rings to squeeze the sealing gaskets, the sealing gaskets are fully attached to the surface of the pull rod 2, making the sealing gaskets and the pull rod 2 fit more tightly, thereby increasing the sealing effect, preventing air or dust from entering the interior of the sealing housing 1, reducing powder leakage and wear on the pull rod 2, and improving production efficiency.

[0039] Please refer to Figure 1 , Figure 2 and Figure 4The pushing assembly 5 includes a rotating rod 501, which is movably connected to the front side of the inner cavity of the sealed housing 1. A rotating disk 502 is fixedly installed on the front side of the rotating rod 501. A worm gear 503 is fixedly installed on the surface of the rotating rod 501. A worm wheel 504 meshes with the bottom of the worm gear 503. A double-acting screw 505 is fixedly installed in the inner cavity of the worm wheel 504. Fixing blocks 506 are threadedly connected to both sides of the surface of the double-acting screw 505. A connecting plate 507 is fixedly installed on the rear side of the fixing block 506. A support block 508 is fixedly installed on the rear side of the connecting plate 507. The top and bottom of the support block 508 are fixedly installed. An arc-shaped block 509 is fixedly installed. An inclined plate 510 is movably connected to opposite sides of each of the two arc-shaped blocks 509. A support plate 511 is fixedly installed to opposite sides of each of the two inclined plates 510. A support plate 512 is fixedly installed between opposite sides of the two support plates 511. One side of the support plate 512 is fixedly connected to one side of the connecting ring 6. A connecting rod 513 is fixedly installed to one side of the support plate 511. A protective shell 514 is mounted on the surface of the connecting rod 513. A spring 515 is fixedly installed to one side of the connecting rod 513. The side of the spring 515 near the protective shell 514 is fixedly connected to the protective shell 514. A movable block 516 is movably connected to the rear side of the rotating rod 501. The side of the movable block 516 near the sealing shell 1 is fixedly connected to the sealing shell 1. A sliding block 517 is fixedly installed to the rear side of the support block 508. A sliding rod 518 is slidably connected to the inner cavity of the sliding block 517. Both sides of the sliding rod 518 are fixedly installed in the inner cavity of the sealing shell 1. Positioning blocks 519 are fixedly installed on both the front and rear sides of the support plate 511. A positioning rod 520 is slidably connected to the inner cavity of the positioning block 519. The side of the positioning rod 520 closest to the sealing housing 1 is fixedly connected to the sealing housing 1. A fixing ring 521 is sleeved on the surface of the protective shell 514. The side of the fixing ring 521 closest to the sealing housing 1 is fixedly connected to the sealing housing 1. When it is necessary to move the two connecting rings 6, the rotating disk 502 is rotated. When the rotating disk 502 rotates, it drives the rotating rod 501 to rotate. When the rotating rod 501 rotates, it drives the worm gear 503 to rotate. When the worm gear 503 rotates, it drives the worm wheel 504 to rotate. When the worm wheel 504 rotates, it drives the double-acting screw 505 to rotate. When the double-acting screw 505 rotates, it drives the two fixed blocks 506 to move relative to each other. When the fixed blocks 506 move, they drive the support block 508 to move through the connecting plate 507. When the support block 508 moves, it drives the arc block 509 to move. When the arc block 509 moves, it presses the inclined plate 510, which drives the support plate 511 to move. When the support plate 511 moves, it drives the support disk 512 to move. When the two support disks 512 move, they drive the two connecting rings 6 to move in opposite directions, thereby achieving a seal on the pull rod 2.

[0040] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, the present utility model is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present utility model, and all technical solutions and improvements that do not depart from the spirit and scope of the invention, are covered within the scope of the claims of the present utility model.

Claims

1. A sealing structure for a coal mill, characterized in that, include: A pull rod (2) installed in the inner cavity of the sealed housing (1); First sealing rings (3) are installed at the top and bottom of the tie rod (2); The number of the first sealing rings (3) is set to two. Sealing components (4) are fixedly installed at the top and bottom of the inner cavity of the sealing housing (1). A pushing component (5) is movably connected to the front side of the inner cavity of the sealing housing (1). A connecting ring (6) is fixedly installed at the top and bottom of the pushing component (5). A first sealing ring (7) is installed on one side of the connecting ring (6), and a second sealing ring (8) is installed on one side of the connecting ring (6). The sealing component (4) includes a sealing shell (401). Two sealing shells (401) are fixedly installed at the top and bottom of the sealing housing (1), respectively. The inner cavity of (401) is provided with a first sealing groove (402), the inner cavity of the sealing shell (401) is provided with a second sealing groove (403), the inner cavity of the sealing shell (401) is provided with a first sealing gasket (404), the inner cavity of the sealing shell (401) is provided with a second sealing gasket (405), the inner cavity of the sealing shell (401) is provided with a third sealing gasket (406), the pushing assembly (5) includes a rotating rod (501), the rotating rod (501) is movably connected to the front side of the inner cavity of the sealing shell (1), and a rotating disk (502) is fixedly installed on the front side of the rotating rod (501). A worm gear (503) is fixedly mounted on the surface of the rotating rod (501). A worm wheel (504) meshes with the bottom of the worm gear (503). A double-acting lead screw (505) is fixedly mounted inside the worm wheel (504). Fixed blocks (506) are threadedly connected to both sides of the surface of the double-acting lead screw (505). A connecting plate (507) is fixedly mounted on the rear side of the fixed block (506). A support block (508) is fixedly mounted on the rear side of the connecting plate (507). Arc-shaped blocks (509) are fixedly mounted on the top and bottom of the support block (508). The opposite sides of the two arc-shaped blocks (509) are movably connected. There are inclined plates (510), and support plates (511) are fixedly installed on opposite sides of the two inclined plates (510). A support plate (512) is fixedly installed between opposite sides of the two support plates (511). One side of the support plate (512) is fixedly connected to one side of the connecting ring (6). A connecting rod (513) is fixedly installed on one side of the support plate (511). A protective shell (514) is installed on the surface of the connecting rod (513). A spring (515) is fixedly installed on one side of the connecting rod (513). The side of the spring (515) near the protective shell (514) is fixedly connected to the protective shell (514).

2. The sealing structure for a coal mill according to claim 1, characterized in that, The surface of the sealing shell (401) is provided with a second sealing ring (407), and the second sealing ring (407) is fixedly connected to the sealing shell (1) on the side near the sealing shell (1).

3. The sealing structure for a coal mill according to claim 1, characterized in that, The rear side of the rotating rod (501) is movably connected to a movable block (516), and the movable block (516) is fixedly connected to the sealing housing (1) on the side near the sealing housing (1).

4. A sealing structure for a coal mill according to claim 3, characterized in that, A sliding block (517) is fixedly installed on the rear side of the support block (508), and a sliding rod (518) is slidably connected to the inner cavity of the sliding block (517). Both sides of the sliding rod (518) are fixedly installed in the inner cavity of the sealing shell (1).

5. A sealing structure for a coal mill according to claim 4, characterized in that, Positioning blocks (519) are fixedly installed on the front and rear sides of the support plate (511). A positioning rod (520) is slidably connected to the inner cavity of the positioning block (519). The positioning rod (520) is fixedly connected to the sealing shell (1) on the side near the sealing shell (1).

6. A sealing structure for a coal mill according to claim 4, characterized in that, A fixing ring (521) is fitted on the surface of the protective shell (514), and the fixing ring (521) is fixedly connected to the sealing shell (1) on the side close to the sealing shell (1).

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