Sealing assembly of coal mill

Abstract

The utility model discloses a coal mill sealing assembly which comprises an upper pull rod, the upper surface of the upper pull rod is fixedly connected with a clamping block, the inner side of the clamping block is fixedly connected with a thrust knuckle bearing, the upper surface of the thrust knuckle bearing is fixedly connected with a top block, and the inner surface of the top block is fixedly connected with an anti-rotation device. The outer surface of the upper pull rod is fixedly connected with an upper sealing assembly and a lower sealing assembly; flange plates are fixedly connected to the lower surfaces of the upper sealing assembly and the lower sealing assembly, the pull rod is protected to prevent blowing damage from affecting the service life, a traditional rigid sealing matching piece is transformed into a flexible sealing internal and external isolation type, the sealing effect is effectively improved, and the service life of the pull rod is prolonged. The modified part has the advantages of high temperature resistance, scouring resistance, high wear resistance, long service life, simple structure, simplicity and convenience in construction, no jam and good contact property, and can bear radial and axial dynamic sealing, so that the inner sealing achieves a better sealing effect.

Description

Technical Field

[0001] The utility model relates to the technical field of leakage control for medium-speed coal mills, and particularly designs a sealing component for coal mills. Background Art

[0002] The medium-speed mill is currently the main milling equipment in the power, metallurgy, building materials and chemical industries. The tie rod is an important loading device for the medium-speed mill, and the tie rod seal is the key sealing part of the medium-speed mill. The commonly used tie rod seal devices currently include an upper seal device and a lower seal device, and a sealed cavity is formed between the upper seal and the lower seal. During operation, the tie rod and its upper seal and lower seal rub against each other, causing the gap between them to gradually increase. As a result, a large amount of powdered hard materials in the coal mill enter the upper seal of the tie rod, aggravating the mutual wear between the tie rod and the upper and lower seals. As a result, the gap between the upper and lower seals and the tie rod gradually increases. The powdered material will directly fall into its sealed cavity through the gap.

[0003] During the reciprocating up and down motion of the existing tie rod, the powdered material will gradually enter the lower seal, which will eventually cause the upper and lower sealing gaps of the coal mill tie rod to exceed the standard and be damaged, and the powdered material will leak out from the lower seal. As the wear of the lower seal continues to increase, the powder leakage will become more serious. In the event of serious powder leakage, the medium-speed mill will be forced to stop operating, resulting in a decrease in the working efficiency of the coal mill. For example, a Chinese patent discloses "a new type of tie rod seal assembly for MPS medium-speed coal mill", and its application number is: "CN201922217562.2", which includes: a sealing block, a tie rod is fixedly provided inside the sealing block, a sealing shell is fixedly connected to the top of the sealing block, an external sealing mechanism is fixedly connected to the bottom of the sealing block, and an internal sealing mechanism is provided inside the sealing shell. When the device leaks powder seriously, the medium-speed mill will be forced to stop operating, resulting in a decrease in the working efficiency of the coal mill, and its applicability is relatively limited. Utility Model Content

[0004] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art and to provide a coal mill sealing assembly. The device retains the original sealing assembly unchanged and adds a dust cover to protect the pull rod itself to prevent blowing damage that affects the service life. The previous rigid sealing fittings are transformed into flexible sealing inside and outside isolation types, which effectively improves the sealing effect. The modified parts are resistant to high temperature, erosion, high wear resistance, long life, simple structure, simple construction, no sticking and good contact. They can withstand radial and axial dynamic sealing, so that the inner seal achieves a better sealing effect. It is very necessary to clean the production site environment, protect the health of on-site workers, reduce energy consumption, and improve coal mill processing. It not only has high economic benefits but also great social benefits. The clamping block plays a role in shock absorption and shaking offset in the entire pull rod.

[0005] The present utility model also provides a coal mill sealing assembly having the above components, including: an upper pull rod, a clamping block is fixedly connected to the upper surface of the upper pull rod, a thrust joint bearing is fixedly connected to the inner side of the clamping block, a top block is fixedly connected to the upper surface of the thrust joint bearing, an anti-rotation device is fixedly connected to the inner surface of the top block, and an upper sealing assembly and a lower sealing assembly are fixedly connected to the outer surface of the upper pull rod; through the mutual cooperation between the above components, the anti-rotation device prevents the pull rod from rotating.

[0006] Flange plates are fixedly connected to the lower surfaces of the upper sealing assembly and the lower sealing assembly. A dust-proof sleeve is sleeved at the middle position between the upper pull rod and the upper sealing assembly. A connecting collar is fixedly connected to the bottom end of the upper pull rod. A lower pull rod is fixedly connected to the lower surface of the connecting collar. A base is fixedly connected to the bottom surface of the lower pull rod. A hydraulic cylinder is fixedly connected to the side surface of the lower pull rod. Through the mutual cooperation between the above components, by retaining the original sealing assembly unchanged and adding a dust-proof sleeve, the pull rod itself is protected to prevent blow damage and affect the service life. It is transformed from a previous rigid sealing fitting to a flexible sealing inner and outer isolation type, effectively improving the sealing effect. The modified part has high temperature resistance, erosion resistance, high wear resistance, long service life, simple structure, convenient construction, no jamming and good contact, and can withstand radial and axial dynamic sealing, so that a good sealing effect is achieved for the inner seal.

[0007] According to the coal mill sealing assembly of the present utility model, a buffer airbag is fixedly connected to the upper surface of the lower pull rod, and clamping blocks are fixedly connected to both sides of the lower pull rod. Through the mutual cooperation between the above components, the buffer force driven downward by the hydraulic cylinder is reduced, and its service life is prolonged.

[0008] According to the coal mill sealing assembly of the present utility model, a first fastening bolt is fixedly connected to the inner side of the connecting collar, and the upper pull rod is fixedly connected to the lower pull rod through the first fastening bolt. Through the mutual cooperation between the above components, it is convenient for fixed connection.

[0009] According to the coal mill sealing assembly of the present utility model, an indicator body is sleeved on the outer surface of the lower pull rod, a screw is fixedly connected to the side surface of the indicator body, and the indicator body is fixedly connected to the outer surface of the lower pull rod through the screw. Through the mutual cooperation between the above components, it is convenient for installation and disassembly.

[0010] According to the coal mill sealing assembly of the present utility model, an adjusting frame is fixedly connected to the side surface of the lower pull rod, a second fastening bolt is fixedly connected to the side surface of the adjusting frame, and the adjusting frame is fixedly connected to the side surface of the lower pull rod through the second fastening bolt. Through the mutual cooperation between the above components, it is convenient to adjust the position of the lower pull rod.

[0011] According to the coal mill sealing assembly of the utility model, the side surface of the indicator is fixedly connected with a bracket, and the side surface of the bracket is fixedly connected with an adjustment plate. The above parts cooperate with each other, which is convenient for use.

[0012] According to the coal mill sealing assembly of the utility model, the material of the clamping block is fluororubber material, and the appearance of the dust cover is pagoda-shaped. Through the mutual cooperation between the above parts, the fluororubber has strong stability, sealing, flexibility, erosion resistance, aging resistance, and high temperature resistance.

[0013] According to the coal mill sealing assembly of the utility model, the upper sealing assembly and the lower sealing assembly are made of fluororubber, and multiple layers of canvas are added in the middle of the dust cover. Through the mutual cooperation between the above parts, the fluororubber material has a certain flexibility, and the multiple layers of canvas are added in the middle of the dust cover to increase strength and durability.

[0014] Beneficial Effects

[0015] Compared with the prior art, the utility model retains the original sealing component and installs a dust cover to protect the pull rod itself to prevent blowing damage that affects the service life. The previous rigid sealing fittings are transformed into flexible sealing inside and outside isolation, which effectively improves the sealing effect. The modified parts are resistant to high temperature, erosion, high wear resistance, long life, simple structure, easy construction, no sticking and good contact. They can withstand radial and axial dynamic sealing, so that the inner seal achieves a better sealing effect. It is very necessary to clean the production site environment, protect the health of on-site workers, reduce energy consumption, and improve the coal mill processing. It not only has higher economic benefits but also greater social benefits. The clamping block plays a role in shock absorption and offsetting shaking in the entire pull rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0017] Figure 1 This is the overall structural diagram of the sealing assembly of the coal mill of the utility model;

[0018] Figure 2 It is a side sectional view of the sealing assembly of the coal mill of the utility model;

[0019] Figure 3 The utility model is a coal mill sealing component Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 The utility model is a coal mill sealing component Figure 2 Enlarged view of point B in the middle;

[0021] Figure 5 The utility model is a coal mill sealing componentFigure 2 Enlarged view at position C in the figure.

[0022] Figure 6 This is the structural diagram of the clamping block of the coal mill sealing component of the present utility model.

[0023] Figure 7 This is the structural diagram of the dust-proof sleeve of the coal mill sealing component of the present utility model.

[0024] Legend:

[0025] 1. Top block; 2. Thrust spherical plain bearing; 3. Upper pull rod; 4. Upper sealing component; 5. Lower sealing component; 6. Connecting ferrule; 7. First fastening bolt; 8. Lower pull rod; 9. Indicator body; 10. Screw; 11. Adjusting frame; 12. Second fastening bolt; 13. Bracket; 14. Adjusting plate; 15. Clamping block; 16. Base; 17. Hydraulic cylinder; 18. Flange; 19. Clamping block; 20. Buffer airbag; 21. Dust-proof sleeve. Specific embodiments

[0026] This part will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the drawings. The function of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but it cannot be construed as a limitation on the protection scope of the present utility model.

[0027] Referring to Figure 1-7 , the coal mill sealing component of the embodiment of the present utility model includes: an upper pull rod 3, a clamping block 15 is fixedly connected to the upper surface of the upper pull rod 3, a thrust spherical plain bearing 2 is fixedly connected to the inner side of the clamping block 15, a top block 1 is fixedly connected to the upper surface of the thrust spherical plain bearing 2, an anti-rotation device is fixedly connected to the inner surface of the top block 1, an upper sealing component 4 and a lower sealing component 5 are fixedly connected to the outer surface of the upper pull rod 3. The upper sealing component 4 and the lower sealing component 5 are made of fluororubber material. Multiple layers of canvas are added in the middle of the dust-proof sleeve 21. The fluororubber material has a certain flexibility. Adding multiple layers of canvas in the middle of the dust-proof sleeve 21 increases strength and durability. The anti-rotation device prevents the pull rod from rotating.

[0028] The upper surface of the upper sealing assembly 4 and the lower sealing assembly 5 is fixedly connected with a flange plate 18. A dust-proof sleeve 21 is sleeved at the middle position of the upper pull rod 3 and the upper sealing assembly 4. The bottom end of the upper pull rod 3 is fixedly connected with a connecting ferrule 6. A first fastening bolt 7 is fixedly connected to the inner side of the connecting ferrule 6. The upper pull rod 3 is fixedly connected with the lower pull rod 8 through the first fastening bolt 7, which is convenient for fixed connection. The lower surface of the connecting ferrule 6 is fixedly connected with the lower pull rod 8. An adjusting frame 11 is fixedly connected to the side surface of the lower pull rod 8. A second fastening bolt 12 is fixedly connected to the side surface of the adjusting frame 11. The adjusting frame 11 is fixedly connected to the side surface of the lower pull rod 8 through the second fastening bolt 12, which is convenient for adjusting the position of the lower pull rod 8. An indicator body 9 is sleeved on the outer surface of the lower pull rod 8. A bracket 13 is fixedly connected to the side surface of the indicator body 9. An adjusting plate 14 is fixedly connected to the side surface of the bracket 13, which is convenient for use. A screw 10 is fixedly connected to the side surface of the indicator body 9. The indicator body 9 is fixedly connected to the outer surface of the lower pull rod 8 through the screw 10, which is convenient for installation and disassembly. A buffer airbag 20 is fixedly connected to the upper surface of the lower pull rod 8. Clamping blocks 19 are fixedly connected to both sides of the lower pull rod 8 to reduce the buffer force driven downward by the hydraulic cylinder 17 and increase its service life. The clamping blocks 19 are made of fluororubber material. The dust-proof sleeve 21 is in the shape of a pagoda. Fluororubber has strong stability, sealing performance, flexibility, erosion resistance, anti-aging property and high temperature resistance. The bottom surface of the lower pull rod 8 is fixedly connected with a base 16. A hydraulic cylinder 17 is fixedly connected to the side surface of the lower pull rod 8. By retaining the original sealing assembly unchanged and adding a dust-proof sleeve 21, the pull rod itself is protected to prevent blow damage from affecting the service life. It is transformed from a previous rigid sealing fitting to a flexible sealing internal and external isolation type, effectively improving the sealing effect. The modified part has high temperature resistance, erosion resistance, high wear resistance, long life, simple structure, convenient construction, no jamming and good contact, and can withstand radial and axial dynamic sealing, so that a good sealing effect is achieved for the internal seal.

[0029] Working principle: When using this device, first, the upper pull rod 3 and the lower pull rod 8 include a base 16, a hydraulic cylinder 17, a buffer airbag 20, and two clamping blocks 19. Secondly, the base 16 is mainly to protect the clamping block 19 in the original design. This clamping block 19 plays a role in shock absorption and offsetting shaking in the entire pull rod. The shaking has a mirror image and axial direction. The material of the clamping block 19 is fluororubber material, which has strong stability, sealing, flexibility, erosion resistance, aging resistance, and high temperature resistance. The added flange 18 is on the base of the clamping block 19, and its shape is square inside and round outside. The round part provides a platform for the base of the dust cover 21, and a pagoda-shaped sealing cover is added on the basis of the platform. The bottom edge of the sealing cover is connected to the flange 18, and the flange 18 and the rubber cover are connected by means of a pressure plate to form a seal inside the pull rod. The powder that falls inside is evacuated and separated through the transformation, which fundamentally solves the problems of sealing, leak prevention, isolation, and cooling, and the loss of sealing can be minimized. By retaining the original sealing component unchanged and adding the dust cover 21, the pull rod itself is protected to prevent blowing damage that affects the service life. The previous rigid sealing fittings are transformed into flexible sealing internal and external isolation types, which effectively improves the sealing effect. The modified parts are resistant to high temperature, erosion, high wear resistance, long life, simple structure, easy construction, no sticking and good contact, and can withstand radial and axial dynamic sealing, so that the internal seal achieves a better sealing effect.

[0030] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. Coal mill seal assembly, characterized in that, Including: An upper pull rod (3), on the upper surface of the upper pull rod (3), a clamping block (15) is fixedly connected, on the inner side of the clamping block (15), a thrust joint bearing (2) is fixedly connected, on the upper surface of the thrust joint bearing (2), a top block (1) is fixedly connected, on the inner surface of the top block (1), an anti-rotation device is fixedly connected, on the outer surface of the upper pull rod (3), an upper sealing assembly (4) and a lower sealing assembly (5) are fixedly connected; On the lower surface of the upper sealing assembly (4) and the lower sealing assembly (5), a flange (18) is fixedly connected. A dust cover (21) is sleeved at the middle position between the upper pull rod (3) and the upper sealing assembly (4). At the bottom end of the upper pull rod (3), a connecting ferrule (6) is fixedly connected. On the lower surface of the connecting ferrule (6), a lower pull rod (8) is fixedly connected. On the bottom surface of the lower pull rod (8), a base (16) is fixedly connected. On the side surface of the lower pull rod (8), a hydraulic cylinder (17) is fixedly connected.

2. The coal mill seal assembly according to claim 1, characterized in that, On the upper surface of the lower pull rod (8), a buffer airbag (20) is fixedly connected. On both sides of the lower pull rod (8), clamping blocks (19) are fixedly connected.

3. The coal mill seal assembly according to claim 1, characterized in that, On the inner side of the connecting ferrule (6), a first fastening bolt (7) is fixedly connected. The upper pull rod (3) is fixedly connected to the lower pull rod (8) through the first fastening bolt (7).

4. The coal mill seal assembly according to claim 1, characterized in that, An indicator body (9) is sleeved on the outer surface of the lower pull rod (8). On the side surface of the indicator body (9), a screw (10) is fixedly connected. The indicator body (9) is fixedly connected to the outer surface of the lower pull rod (8) through the screw (10).

5. The coal mill seal assembly according to claim 1, characterized in that, On the side surface of the lower pull rod (8), an adjusting bracket (11) is fixedly connected. On the side surface of the adjusting bracket (11), a second fastening bolt (12) is fixedly connected. The adjusting bracket (11) is fixedly connected to the side surface of the lower pull rod (8) through the second fastening bolt (12).

6. The coal mill seal assembly according to claim 4, wherein, On the side surface of the indicator body (9), a bracket (13) is fixedly connected. On the side surface of the bracket (13), an adjusting plate (14) is fixedly connected.

7. The coal mill seal assembly according to claim 2, wherein, The material of the clamping block (19) is fluororubber material. The outer shape of the dust cover (21) is pagoda-shaped.

8. The coal mill seal assembly according to claim 1, characterized in that, The materials of the upper sealing assembly (4) and the lower sealing assembly (5) are fluororubber materials. Multiple layers of canvas are added in the middle of the dust cover (21).

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