CN217976700U - Leakage-proof structure of gas fan - Google Patents
Leakage-proof structure of gas fan Download PDFInfo
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- CN217976700U CN217976700U CN202221673233.4U CN202221673233U CN217976700U CN 217976700 U CN217976700 U CN 217976700U CN 202221673233 U CN202221673233 U CN 202221673233U CN 217976700 U CN217976700 U CN 217976700U
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- gas
- gas fan
- sealing
- pipeline
- impeller volute
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Abstract
The utility model relates to the technical field of gas fans, in particular to a gas fan leakage-proof structure, which comprises a gas fan bearing box, a gas fan impeller volute, a gas fan pipeline and a sealing pipeline arranged on the gas fan impeller volute, wherein the gas fan bearing box, the gas fan impeller volute and the gas fan pipeline are connected in sequence; the sealing pipeline is arranged on the coal gas fan impeller volute, so that when the coal gas fan impeller volute works, the sealing pipeline can be used for ventilating the sealing chamber when internal coal gas passes through the sealing chamber and leaks, and the air pressure higher than the coal gas in the coal gas fan impeller volute can be generated in the sealing chamber, so that the coal gas is prevented from leaking from the coal gas fan, and the safety of the working environment of an operator is ensured.
Description
Technical Field
The utility model relates to a coal gas fan technical field, specificly relate to a coal gas fan leak protection structure.
Background
In the calcium carbide production process, a large amount of harmful gases such as coal gas can be generated, the coal gas is usually collected from a coal gas fan bearing box by using a fan, and then the coal gas is discharged to a subsequent coal gas utilization device from a coal gas fan pipeline through the coal gas fan, so that the coal gas is recycled.
Because the calcium carbide is produced in severe environments such as high temperature and the like, a gas fan usually causes gas leakage due to equipment aging, the gas leakage causes the carbon monoxide concentration to exceed the standard in a working environment, the health of field operators is harmed, and meanwhile, accident potential is caused to a working site; meanwhile, gas leakage caused by incomplete sealing of the sealing element due to irregular disassembly and assembly exists.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a coal gas fan leak protection structure solves the problem that coal gas fan caused the coal gas leakage easily.
The utility model discloses a realize that above-mentioned purpose technical scheme does:
the gas fan leakage-proof structure is characterized by comprising a gas fan bearing box, a gas fan impeller volute, a gas fan pipeline and a sealing pipeline, wherein the gas fan bearing box, the gas fan impeller volute and the gas fan pipeline are sequentially connected, the sealing pipeline is arranged on the gas fan impeller volute, a sealing chamber is arranged on one side inside the gas fan impeller volute, a sealing element is arranged in the sealing chamber, the gas outlet end of the gas fan bearing box penetrates through the gas fan impeller volute and extends into the sealing chamber to be connected with the sealing element, and the gas outlet end of the sealing pipeline penetrates through the gas fan impeller volute and extends into the sealing chamber.
Further limiting, the gas fan leakage-proof structure further comprises a replacement gas pipeline, and the gas outlet end of the replacement gas pipeline penetrates through the gas fan impeller volute and extends to the inside of the gas fan impeller volute.
Further limiting, the replacement gas pipeline and the gas fan pipeline are arranged on the same side of the gas fan impeller volute, and the sealing pipeline and the gas fan bearing box are arranged on the same side of the gas fan impeller volute.
Further, a sealing switch valve is arranged on the sealing pipeline, and a scavenging valve is arranged on the replacement gas pipeline.
Further limiting, a coal gas concentration detection device is arranged on the outer side of the impeller volute of the coal gas fan and is in signal connection with the sealing switch valve.
Further defined, the seal is a labyrinth seal.
The beneficial effects of the utility model reside in that:
1. the sealing pipeline is arranged on the gas fan impeller volute, so that when the gas fan impeller volute works, internal gas passes through the sealing chamber and is leaked out, the sealing pipeline can be used for ventilating the sealing chamber, the gas pressure higher than the gas in the gas fan impeller volute can be generated in the sealing chamber, the gas is prevented from leaking out of the gas fan, and the safety of the working environment of an operator is ensured.
2. A gas replacement pipeline is arranged on one side opposite to the gas fan impeller volute, the gas replacement pipeline and the gas fan pipeline are arranged on the same side, the gas replacement pipeline can be used for preventing gas from leaking from the connection position of the gas fan impeller volute and the gas fan pipeline, and nitrogen can be introduced into the gas replacement pipeline to form high pressure so that the gas is discharged along the gas fan pipeline, so that the gas leakage of the gas fan impeller volute is effectively prevented; meanwhile, when the gas fan impeller volute is overhauled, after the gas inlet end of the gas fan bearing box is closed, the gas replacement pipeline is opened to completely replace the gas in the gas fan impeller volute, so that the air in the gas fan impeller volute is stable and nonflammable, and safety accidents caused by overhauling operation are avoided; the safety, stability and reliability of the equipment are improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
in the figure: 1-gas fan bearing box; 2-gas fan impeller volute; 3-gas fan pipeline; 4-sealing the pipeline; 41-sealing switch valve; 5-sealing the chamber; 6-a displacement gas line; 61-a gas exchange valve; 7-gas concentration detection device.
Detailed Description
Referring to fig. 1, the utility model provides a gas fan prevents leaking structure, including the gas fan bearing box 1, gas fan impeller spiral case 2 and the gas fan pipeline 3 that connect gradually, wherein gas fan bearing box 1 is arranged in passing through the gas fan impeller rotation negative pressure that produces of gas that collects and impresses in the gas fan pipeline 3 of relative one side, and wherein gas fan impeller installs in gas fan impeller spiral case 2.
The end part corresponding to the gas fan bearing box 1 is connected with the side end face of the gas fan impeller volute 2, so that gas in the gas fan bearing box 1 can be directly introduced into the gas fan impeller volute 2, in order to prevent gas discharged by the gas fan bearing box 1 from leaking, a sealing chamber 5 is arranged on the corresponding side wall in the gas fan impeller volute 2, a sealing element such as sealing rubber is arranged in the sealing chamber 5, so that the end part corresponding to the gas fan bearing box 1 penetrates through the side wall of the gas fan impeller volute 2 to extend into the sealing chamber 5, the gas fan impeller volute 2 is connected with the gas fan bearing box 1 in a sealing mode through the sealing element, the sealing effect is improved, and the gas fan is prevented from leaking.
The sealing element is preferably a labyrinth sealing element, a sealing pipeline 4 is arranged on the side wall of the gas fan impeller volute 2, the sealing pipeline 4 is preferably arranged on the same side of the gas fan bearing box 1, and the gas outlet end of the sealing pipeline 4 is connected with the labyrinth sealing element; the seal pipeline 4 is filled with air or inert gas or nitrogen, and the nitrogen is selected optionally, so that when the sealing effect of the labyrinth seal is reduced to cause the gas to leak outwards, the nitrogen is filled through the seal pipeline 4, the air pressure in the labyrinth seal is increased, the sealing effect is improved, or the seal pipeline 4 is filled with the nitrogen into the seal chamber to increase the air pressure in the seal chamber 5, and therefore the gas with lower air pressure can be prevented from being conveyed to the gas fan pipeline 3 from the other side of the gas fan impeller volute 2.
In order to avoid the waste of nitrogen, a sealing switch valve 41 can be arranged on the sealing pipeline 4 and is used for opening when gas leaks so as to prevent the gas leakage of the gas fan impeller volute 2; in order to further improve the monitoring of gas leakage, a gas concentration detection device 7 can be installed on the outer side of the gas fan impeller volute 2 and is in signal connection with the sealing switch valve 41, so that when the gas concentration detection device 7 detects that the concentration of gas in the external environment is higher than a preset value, the sealing switch valve 41 is controlled to be opened, and the gas leakage at the side end of the gas fan impeller volute 2 is prevented.
A replacement gas pipeline 6 is arranged on the opposite side of the gas fan impeller volute 2, the replacement gas pipeline 6 and the gas fan pipeline 3 are arranged on the same side, the gas can be prevented when gas leaks from the connecting position of the gas fan impeller volute 2 and the gas fan pipeline 3, nitrogen can be introduced into the replacement gas pipeline 6 to form high pressure so that the gas is discharged along the gas fan pipeline 3, and the gas leakage of the gas fan impeller volute 2 is effectively prevented; meanwhile, when the gas fan impeller volute 2 is overhauled, after the gas inlet end of the gas fan bearing box 1 can be closed, the gas replacement pipeline 6 is opened to completely replace the gas in the gas fan impeller volute 2, so that the air in the gas fan impeller volute 2 is stable and nonflammable, and safety accidents caused by overhauling operation are avoided; the safety, stability and reliability of the equipment are improved; in order to facilitate the control of the start and stop of the displacement gas pipe 6, a scavenging valve 61 may be installed on the displacement gas pipe 6, and the flow of nitrogen gas in the pipe is realized by operating the scavenging valve 61.
Claims (6)
1. The gas fan leakage-proof structure is characterized by comprising a gas fan bearing box (1), a gas fan impeller volute (2) and a gas fan pipeline (3) which are sequentially connected, and further comprising a sealing pipeline (4) arranged on the gas fan impeller volute (2), wherein a sealing chamber (5) is arranged on one side inside the gas fan impeller volute (2), a sealing element is arranged in the sealing chamber (5), the gas outlet end of the gas fan bearing box (1) penetrates through the gas fan impeller volute (2) and extends into the sealing chamber to be connected with the sealing element, and the gas outlet end of the sealing pipeline (4) penetrates through the gas fan impeller volute (2) and extends into the sealing chamber.
2. The gas fan leakage prevention structure according to claim 1, further comprising a replacement gas pipe (6), wherein the gas outlet end of the replacement gas pipe (6) extends through the gas fan impeller volute (2) to the inside of the gas fan impeller volute (2).
3. The gas fan leakage-proof structure according to claim 2, wherein the replacement gas pipe (6) and the gas fan pipe (3) are disposed on the same side of the gas fan impeller volute (2), and the seal pipe (4) and the gas fan bearing housing (1) are disposed on the same side of the gas fan impeller volute (2).
4. The gas fan leakage prevention structure according to claim 3, wherein a sealing switch valve (41) is provided on the sealing pipe (4), and a scavenging valve (61) is provided on the replacement gas pipe (6).
5. The gas fan leakage-proof structure according to claim 4, wherein a gas concentration detection device (7) is arranged at the outer side of the gas fan impeller volute (2), and the gas concentration detection device (7) is in signal connection with the sealing switch valve (41).
6. The gas fan leakage prevention structure of claim 5, wherein the seal is a labyrinth seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221673233.4U CN217976700U (en) | 2022-06-30 | 2022-06-30 | Leakage-proof structure of gas fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221673233.4U CN217976700U (en) | 2022-06-30 | 2022-06-30 | Leakage-proof structure of gas fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217976700U true CN217976700U (en) | 2022-12-06 |
Family
ID=84275370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221673233.4U Active CN217976700U (en) | 2022-06-30 | 2022-06-30 | Leakage-proof structure of gas fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217976700U (en) |
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2022
- 2022-06-30 CN CN202221673233.4U patent/CN217976700U/en active Active
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