Coal mill dust sealing gate valve

Abstract

A coal mill dust sealing gate valve is installed at an outlet of a slag discharging opening of a coal mill, can bear a sealing link in the whole grinding process, and ensures that pulverized coal is not accumulated and solid waste slag and bad pulverized coal are conveyed in time in the normal operation process of the coal mill. The safety of a pulverized coal system is ensured, pulverized coal leakage is effectively prevented, and the safety of a working environment is ensured. Meanwhile, accumulated pulverized coal is periodically cleaned through the gate valve, so that the pulverized coal is prevented from being accumulated and spontaneously combusted, and the coal mill equipment is safer to use.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical equipment technology, specifically relating to a coal mill dust sealing gate valve, which plays a safety protection role in the operation of the coal mill. Background Technology

[0002] A coal mill is a device used for crushing coal lumps and is widely used in industries such as power generation and steel smelting. The working principle of a coal mill is to feed coal lumps into the mill, where they are ground into powder through the rotation, friction, and grinding of the millstone. The powder is then fed into a boiler for combustion through a sealing device.

[0003] During the grinding process, coal dust can cause dangers such as explosions and pollution, so strict sealing conditions are required to ensure safety and environmental protection. Utility Model Content

[0004] In view of the aforementioned existing technologies, coal dust poses risks such as explosion and pollution during the coal mill grinding process. This utility model proposes a coal mill dust sealing gate valve, installed at the coal mill slag discharge outlet. It serves as a sealing element throughout the grinding process, ensuring that coal dust does not accumulate during normal operation and promptly conveying solid waste and defective coal dust. This ensures the safety of the coal dust system, effectively prevents coal dust leakage, and guarantees a safe working environment. Simultaneously, the gate valve's regular cleaning of accumulated coal dust prevents spontaneous combustion due to coal dust buildup, making the coal mill equipment safer to use.

[0005] Technical solution

[0006] To achieve the above-mentioned technical objectives, this utility model provides a coal mill dust sealing gate valve, characterized in that it comprises:

[0007] Housing, gate cover, drive shaft, connecting block, bushing, fixing block, spacing sleeve, sealing cover, connecting screw, upper connecting nut, upper connecting washer, upper connecting bolt, connecting bolt one, connecting washer one, large cotter pin, connecting fork, positioning block, large bushing, first seal, second seal, lubricating oil pipe, fixing pipe clamp, small cotter pin, cylinder, slide bolt, connecting bolt two, connecting washer two, limit pin, connector and oil nozzle;

[0008] The housing is connected to the flange of the coal mill slag discharge port via an upper connecting nut, an upper connecting gasket, and an upper connecting bolt;

[0009] The gate cover is horizontally positioned above the slide bolt, with one end connected to the connecting fork via a large cotter pin and the other end connected to the drive shaft;

[0010] One end of the drive shaft is connected to the cylinder via a small cotter pin, and the other end is connected to the connecting fork via a large cotter pin.

[0011] The connecting block is fixed to the middle of the drive shaft and mechanically connected to the fixing block;

[0012] The fixing block is fixed to the housing, and a bushing is nested inside it;

[0013] The spacer sleeve connects the upper connecting nut, upper connecting washer and upper connecting bolt to provide support space for the sealing cover;

[0014] The sealing cap is connected to the housing by connecting screws;

[0015] The connecting bolts are connected to the housing via connecting washers;

[0016] The positioning block is located on the connection side between the drive shaft and the connecting fork, and the inner side of the positioning block is in contact with the large shaft sleeve.

[0017] The lubricating oil pipe connects the fixing block and the large bushing, and the lubricating oil pipe is positioned in the housing by a fixing pipe clamp;

[0018] The slide rail bolts are threadedly connected to the housing.

[0019] The limiting pin is connected to the second connecting bolt and the second connecting washer.

[0020] In one embodiment, the cylinder drives the gate cover via a drive shaft to achieve the opening and closing motion.

[0021] In one embodiment, one side of the large bushing is fitted with the first seal and the second seal, and the other side is fitted with the bushing.

[0022] In one embodiment, the connector and nozzle are connected to a lubricating oil line.

[0023] In one embodiment, the fixing block is welded to the housing.

[0024] In one embodiment, the sealing cap is provided with a labyrinth sealing structure.

[0025] Beneficial effects

[0026] This utility model provides a coal mill dust sealing gate valve, installed at the slag discharge outlet of the coal mill. It serves as a sealing element throughout the grinding process, ensuring that coal dust does not accumulate during normal operation and promptly conveying solid waste and defective coal dust. This ensures the safety of the coal dust system, effectively prevents coal dust leakage, and guarantees a safe working environment. Simultaneously, the gate valve's regular cleaning of accumulated coal dust prevents spontaneous combustion, making the coal mill equipment safer to use. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Appendix Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0029] Appendix Figure 2 This is a front view of an embodiment of the present utility model. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0035] Example

[0036] As attached Figure 1 and 2 As shown, a coal mill dust sealing gate valve includes a housing 1, a gate cover 2, a drive shaft 3, a connecting block 4, a bushing 5, a fixing block 6, a spacing sleeve 7, a sealing cover 8, a connecting screw 9, an upper connecting nut 10, an upper connecting gasket 11, an upper connecting bolt 12, a first connecting bolt 13, a first connecting gasket 14, a large cotter pin 15, a connecting fork 16, a positioning block 17, a large bushing 18, a first sealing element 19, a second sealing element 20, a lubricating oil pipe 21, a fixing pipe clamp 22, a small cotter pin 23, a cylinder 24, a slide bolt 25, a second connecting bolt 26, a second connecting gasket 27, a limit pin 28, a connector 29, and an oil nozzle 30.

[0037] The housing 1 is connected to the flange of the coal mill slag discharge port via an upper connecting nut 10, an upper connecting washer 11, and an upper connecting bolt 12; the gate cover 2 is horizontally positioned above the slide bolt 25, with one end connected to the connecting fork 16 via a large cotter pin 15 and the other end connected to the drive shaft 3; one end of the drive shaft 3 is connected to the cylinder 24 via a small cotter pin 23 and the other end is connected to the connecting fork 16 via a large cotter pin 15.

[0038] The connecting block 4 is fixed to the middle of the drive shaft 3 and mechanically connected to the fixing block 6; the fixing block 6 is welded and positioned on the housing 1, and a bushing 5 is nested inside it; the spacing sleeve 7 connects the upper connecting nut 10, the upper connecting washer 11 and the upper connecting bolt 12, providing support space for the sealing cover 8; the sealing cover 8 is connected to the housing 1 by the connecting screw 9, and the sealing cover 8 has a labyrinth sealing structure; the connecting bolt 13 is connected to the housing 1 by the connecting washer 14; the positioning block 17 is set on the connection side of the drive shaft 3 and the connecting fork 16, and the inner side of the positioning block 17 is in contact with the large bushing 18; the lubricating oil pipe 21 connects the fixing block 6 and the large bushing 18, one side of the large bushing 18 is in contact with the first seal 19 and the second seal 20, and the other side is in contact with the bushing 5. The lubricating oil pipe 21 is positioned on the housing 1 by the fixing pipe clamp 22; the slide bolt 25 is threadedly connected to the housing 1; the limiting pin 28 is connected to the second connecting bolt 26 and the second connecting washer 27. The cylinder 24 drives the gate cover 2 to open and close via the drive shaft 3. The connector 29 and the grease nipple 30 are connected to the lubrication oil pipe 21. The fixing block 6 is welded and positioned to the housing 1. Finally, through the continuous oil replenishment by the grease nipple 30, the drive shaft 3 pulls the gate cover 2 to move repeatedly, reducing wear. At the same time, the gate cover 2 is made of cast material, which enhances the wear resistance of the material and extends the service life of the gate valve.

[0039] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0040] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A coal mill dust sealing gate valve, characterized in that, include: Housing (1), gate cover (2), drive shaft (3), connecting block (4), bushing (5), fixing block (6), spacing sleeve (7), sealing cover (8), connecting screw (9), upper connecting nut (10), upper connecting gasket (11), upper connecting bolt (12), connecting bolt one (13), connecting gasket one (14), large cotter pin (15), connecting fork (16), positioning block (17), large bushing (18), first seal (19), second seal (20), lubricating oil pipe (21), fixing pipe clamp (22), small cotter pin (23), cylinder (24), slide bolt (25), connecting bolt two (26), connecting gasket two (27), limit pin (28), connector (29) and oil nozzle (30); The housing (1) is connected to the flange of the coal mill slag discharge port by an upper connecting nut (10), an upper connecting gasket (11) and an upper connecting bolt (12); The gate cover (2) is horizontally positioned above the slide bolt (25), with one end connected to the connecting fork (16) via a large cotter pin (15) and the other end connected to the drive shaft (3); One end of the drive shaft (3) is connected to the cylinder (24) via a small cotter pin (23), and the other end is connected to the connecting fork (16) via a large cotter pin (15). The connecting block (4) is fixed to the middle of the transmission shaft (3) and mechanically connected to the fixing block (6); The fixing block (6) is fixed on the housing (1), and a bushing (5) is nested inside it; The spacing sleeve (7) connects the upper connecting nut (10), the upper connecting washer (11) and the upper connecting bolt (12) to provide support space for the sealing cover (8); The sealing cap (8) is connected to the housing (1) by connecting screws (9); The connecting bolt (13) is connected to the housing (1) via a connecting washer (14); The positioning block (17) is located on the connection side between the drive shaft (3) and the connecting fork (16), and the inner side of the positioning block (17) is in contact with the large bushing (18); The lubricating oil pipe (21) connects the fixing block (6) and the large bushing (18), and the lubricating oil pipe (21) is positioned in the housing (1) by the fixing pipe clamp (22); The slide bolt (25) is threadedly connected to the housing (1); The limiting pin (28) is connected to the connecting bolt (26) and the connecting washer (27).

2. The coal mill dust sealing gate valve as described in claim 1, characterized in that: The cylinder (24) drives the gate cover (2) through the transmission shaft (3) to achieve the opening and closing motion.

3. The coal mill dust sealing gate valve as described in claim 1, characterized in that: The large bushing (18) is fitted with the first seal (19) and the second seal (20) on one side, and with the bushing (5) on the other side.

4. The coal mill dust sealing gate valve as described in claim 1, characterized in that: The connector (29) and the grease nipple (30) are connected to the lubricating oil pipe (21).

5. The coal mill dust sealing gate valve as described in claim 1, characterized in that: The fixing block (6) is welded and positioned to the shell (1).

6. The coal mill dust sealing gate valve as described in claim 1, characterized in that: The sealing cap (8) is provided with a labyrinth sealing structure.

Images