CN-116518142-B - Dustproof lubrication structure of dome valve shaft

CN116518142BCN 116518142 BCN116518142 BCN 116518142BCN-116518142-B

Abstract

The invention provides a dustproof lubricating structure of a dome valve shaft, which comprises a graphite copper sleeve and a dustproof assembly, wherein the graphite copper sleeve is sleeved on the dome valve shaft, the dome valve shaft can rotate relative to the graphite copper sleeve, the graphite copper sleeve is provided with an annular groove, an air hole and an air groove, the annular groove and the air groove are recessed inwards in the inner wall of the graphite copper sleeve along the radial direction of the dome valve shaft, the air hole penetrates through the inner wall and the outer wall of the graphite copper sleeve and is communicated with the annular groove, the air groove is communicated with the annular groove along the axial direction of the dome valve shaft, the air groove extends to one end of the graphite copper sleeve along the axial direction of the dome valve shaft, and the dustproof assembly is annular and sleeved on the dome valve shaft and is abutted with the air groove of the graphite copper sleeve along the axial direction of the dome valve shaft. The invention not only has lubrication function to the dome valve shaft, but also has dustproof function, ensures the flexible operation of the dome valve, ensures the safety and reliability of equipment, greatly reduces the failure rate of the dome valve, and improves the working environment.

Inventors

LI QIYUAN
CHENG CHUNHUA
WANG AILING
JIANG CHENGFU
CHEN XIAOCHUANG
YANG LINGBO
LIU XIANQING
DAI MINGLI
ZHU ZHONGWEN
Xiao Zuixiong
Zou Xiujun

Assignees

宝武水务科技有限公司

Dates

Publication Date: 20260512
Application Date: 20230615

Claims (8)

1. The dustproof lubricating structure of the dome valve shaft is characterized by comprising a graphite copper sleeve and a dustproof assembly, wherein the graphite copper sleeve is sleeved on the dome valve shaft, and the dome valve shaft can rotate relative to the graphite copper sleeve; The graphite copper sleeve is provided with an annular groove, an air hole and an air groove, wherein the annular groove and the air groove are both recessed in the inner wall of the graphite copper sleeve inwards along the radial direction of the dome valve shaft; the dustproof assembly is annular and sleeved on the dome valve shaft, and is abutted with the air groove of the graphite copper sleeve along the axial direction of the dome valve shaft; The dustproof assembly comprises a spacing ring and a dustproof ring, and the dustproof ring, the spacing ring and the graphite copper sleeve are sequentially abutted along the axial direction of the dome valve shaft; The dustproof ring comprises a dustproof sealing ring and an outer ring, the dustproof sealing ring is sleeved on the dome valve shaft, the inner wall of the outer ring is fixedly connected with the dustproof sealing ring, the spacer ring is abutted to the outer ring, a gap is reserved between the inner wall of the spacer ring and the dome valve shaft, and one end of the dustproof sealing ring extends into the gap between the spacer ring and the dome valve shaft.
2. The dustproof lubrication structure of the dome valve shaft of claim 1, wherein the dustproof sealing ring is a rubber ring, and the spacer ring is made of metal.
3. The dust-proof lubrication structure of a dome valve shaft of claim 1, wherein a depth of the annular groove is the same as a depth of the air groove.
4. The dustproof lubrication structure of the dome valve shaft of claim 3, wherein the depth of the annular groove and the depth of the air groove are both 0.8 mm-1.5 mm.
5. The dustproof lubrication structure of the dome valve shaft of claim 1, wherein the groove width of the annular groove is 10 mm-14 mm.
6. The dust lubrication structure of a dome valve shaft of claim 1, wherein the air groove comprises a first groove section and a second groove section connected in an axial direction of the dome valve shaft, the first groove section being closer to the dust assembly, a length of the first groove section being less than a length of the second groove section, and a width of the first groove section being less than a width of the second groove section.
7. The dust-proof lubrication structure of a dome valve shaft of claim 6, wherein the first groove section has a width of 0.8mm to 1.2mm, and the second groove section has a width of 1.8mm to 2.2mm.
8. The dustproof lubrication structure of the dome valve shaft of claim 1, wherein the inner wall of the graphite copper sleeve is uniformly provided with a plurality of holes, and graphite is inlaid in the holes.

Description

Dustproof lubrication structure of dome valve shaft Technical Field The invention relates to the technical field of dome valves, in particular to a dustproof lubrication structure of a dome valve shaft. Background In modern society, there are numerous pipelines for transporting various gases and liquids, and in order to control the opening and closing of these pipelines, various valves are required to be arranged in the pipelines, and the opening or closing of the valves is used for controlling the supply or stopping of materials in the pipelines. The dome valve is used as a novel valve, can be effectively and rapidly opened and closed to release and intercept, and is widely applied to industries such as metallurgy, cement, electric power, chemical industry, building materials, food and the like at present. In some steel plants, sintering flue gas adopts an SDA semi-dry desulfurization process, the semi-dry flue gas purification device is mainly used for desulfurizing Ca (OH) 2 solution, the solution is sprayed into a desulfurizing tower through an atomizer, slurry is fully contacted with flue gas in the desulfurizing tower, the effect of absorbing SO 2 and other acid gases is rapidly completed, the reaction is completed, and meanwhile, the reaction is rapidly dried, about 250 tons of desulfurized ash is produced each day, the desulfurized ash is collected into a desulfurized ash bin through a cloth bag dust collector system and pneumatic ash conveying, an ash hopper adopts a long-bag low-pressure pulse dust collector to carry out chamber-division constant pressure difference off-line ash cleaning, a pneumatic ash conveying bin pump is matched, and the pneumatic ash conveying bin pump mainly uses a dome valve, SO that ash cannot be conveyed once the dome valve leaks air or is blocked. Currently, copper sleeves are commonly sleeved on dome valve shafts. Fig. 1 is a schematic diagram of an existing copper bush, fig. 2 is a D-direction view of fig. 1, specifically, referring to fig. 1 and 2, an oil filling hole 101 is formed in the copper bush 100 and is communicated with an annular oil groove 102 formed in the inner wall of the copper bush, the width L of the annular oil groove 102 in the axial direction is 4 mm-6 mm, a dust ring is arranged on the inner side of the copper bush, close to a dome valve shaft, and lubricating oil enters between the copper bush and the dome valve shaft through the oil filling hole 101 to lubricate when the copper bush is in operation. However, since the desulfurization ash is fine and contains a part of the sinter powder, and the amount of the desulfurization ash is also large, the dome valve is frequent in operation, so that the dust ring is easily worn out quickly, the dust ring loses the sealing effect, the dust can enter a gap (the gap is 0.03mm-0.06 mm) between the copper bush and the dome valve shaft, the dust and grease are stuck together, and the longer the time, the more accumulated the dust, and finally the dome valve is stuck. The ash discharging efficiency can be influenced due to the fact that the clamping switch of the dome valve is not in place, soft connection of the dome valve and an ash bucket is damaged, and a sealing ring of the dome valve is damaged, when serious, the dome valve is blocked, ash cannot be discharged, high material level of the ash bucket is caused, and major potential safety hazards occur. The dome valve is required to be disassembled and disassembled by replacing one dome valve sealing ring, three persons and two days are required to work, dust can be raised in the process of overhauling the dome valve, and bad influence is caused on the working environment. Disclosure of Invention The invention aims to provide a dustproof lubricating structure of a dome valve shaft, which not only can lubricate the dome valve shaft, but also can prevent dust, thereby ensuring flexible operation of the dome valve, ensuring safe and reliable equipment, greatly reducing the failure rate of the dome valve, and improving the working environment. In order to achieve the aim, the invention provides a dustproof lubrication structure of a dome valve shaft, which comprises a graphite copper sleeve and a dustproof assembly, wherein the graphite copper sleeve is sleeved on the dome valve shaft, and the dome valve shaft can rotate relative to the graphite copper sleeve; The graphite copper sleeve is provided with an annular groove, an air hole and an air groove, wherein the annular groove and the air groove are both recessed in the inner wall of the graphite copper sleeve inwards along the radial direction of the dome valve shaft; the dustproof assembly is annular and sleeved on the dome valve shaft, and is abutted with the air groove of the graphite copper sleeve along the axial direction of the dome valve shaft. Optionally, the dustproof subassembly includes spacer ring and dust ring, the dust ring the spacer ring with graphite copper sheathing is followed the axial bu