CN210770621U - Low-temperature liquid valve with leakage-proof function - Google Patents
Low-temperature liquid valve with leakage-proof function Download PDFInfo
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- CN210770621U CN210770621U CN201921224634.XU CN201921224634U CN210770621U CN 210770621 U CN210770621 U CN 210770621U CN 201921224634 U CN201921224634 U CN 201921224634U CN 210770621 U CN210770621 U CN 210770621U
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Abstract
The utility model discloses a cryogenic liquids valve with leak protection function, it includes cryogenic liquids valve and jet-propelled heating device, jet-propelled heating device includes annular trachea, air supply pipe and gas heater, annular trachea cover is outside at the valve rod of cryogenic liquids valve, be equipped with the valve rod and the relative air jet of flange with the cryogenic liquids valve on annular tracheal pipe wall, the one end and the annular trachea of air supply pipe are connected, and the other end is connected with high pressurized air source, gas heater installs on the air supply pipe. The utility model discloses add jet-propelled heating device on the low temperature liquid valve, utilize the valve rod and press the heat transfer that the blue will jet-propelled heating device provide for the sealing filler in the low temperature liquid valve, make the sealing filler thermal expansion, improve sealing performance. The valve can effectively prevent the leakage phenomenon of the valve rod, reduce the shutdown maintenance time, ensure the smooth production and avoid the waste of energy.
Description
Technical Field
The utility model relates to a cryogenic liquids valve for air separation plant can prevent effectively that the valve rod weeping belongs to valve technical field.
Background
The air separation device is a device for separating air into oxygen, nitrogen, argon and other gases by using a cryogenic method, a low-temperature valve is a component which is used in the air separation device in a large amount, and because the pressure of fluid in the valve is high, a sealing filler between a valve rod and a valve body is easy to damage after being used for a period of time, the liquid in the valve is leaked from the valve rod after passing through the sealing filler, the leaked low-temperature liquid can be frozen and cracked on a heat insulation plate (a cold box plate) of the air separation device, and meanwhile, the damage of nearby equipment can be caused, if nearby electrical equipment exists, a fire disaster can be possibly caused, and great threat is caused to the safety of the equipment and.
The sealing packing of the low-temperature valve is compressed by a pressing flange (see figure 1), at present, slight leakage faults of the valve rod are generally eliminated by fastening the pressing flange, when the leakage faults are serious, the machine can only be stopped to replace or add new sealing packing, and the frequent leakage faults not only seriously affect the smooth production, but also cause great waste of energy. Therefore, how to effectively prevent the leakage of the cryogenic liquid valve is the subject of the related art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to the drawback of prior art, a cryogenic liquids valve with leak protection function is provided to prevent that the weeping phenomenon from appearing in the valve stem, reduce the shut down maintenance duration, guarantee that production goes on smoothly.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a low temperature liquid valve with leak protection function, includes low temperature liquid valve and jet-propelled heating device in the constitution, jet-propelled heating device includes annular trachea, air supply pipe and gas heater, annular trachea cover is outside at the valve rod of low temperature liquid valve, be equipped with on annular tracheal pipe wall with the valve rod of low temperature liquid valve with press the jet-propelled mouth that the blue is relative, the one end and the annular trachea of air supply pipe are connected, and the other end is connected with high pressurized air source, gas heater installs on the air supply pipe.
The low-temperature liquid valve with the leakage-proof function is characterized in that the heating control valve is arranged on the gas supply pipe.
In the low-temperature liquid valve with the leakage-proof function, the gas provided by the high-pressure gas source is dry compressed air.
In the low-temperature liquid valve with the leakage-proof function, the plurality of air nozzles on the annular air pipe are uniformly distributed along the annular air pipe.
The gas heater is an electric heater.
The utility model discloses add jet-propelled heating device on the low temperature liquid valve, utilize the valve rod and press the heat transfer that the blue will jet-propelled heating device provide for the sealing filler in the low temperature liquid valve, make the sealing filler thermal expansion, improve sealing performance. The valve can effectively prevent the leakage phenomenon of the valve rod, reduce the shutdown maintenance time, ensure the smooth production and avoid the waste of energy.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic structural diagram of the present invention.
The reference numbers in the figures are as follows: 1. the device comprises a valve rod, 2, an annular air pipe, 3, a flange, 4, sealing filler, 5, a heating control valve, 6, an air supply pipe, 7 and an air heater.
Detailed Description
The utility model provides a cryogenic liquids valve with leak protection function, this cryogenic liquids valve take the method of heating to the valve rod is supplementary, guarantee the sealing temperature of valve rod, utilize the principle of sealed thermal expansion to improve sealed effect, can effectively prevent the emergence of valve rod weeping phenomenon.
Analysis of valve rod leakage reasons: after slight damage of the sealing filler, a small amount of gas seeps out, the sealing filler can contract when being cooled due to the fact that the temperature of the seeped gas is lower, and therefore the distance between the valve rod and the sealing filler can be increased, the leaked gas is increased, the temperature of the sealing filler is further reduced due to the increase of the leaked gas, the contraction quantity is further increased, vicious circle is formed, the leakage liquid quantity is finally increased continuously, and the leakage from the beginning is converted into continuous leakage.
Can know through above analysis, the decline of seal packing temperature is the leading cause that leads to cryogenic liquids valve weeping, consequently the utility model discloses increased jet heating device on the basis of original cryogenic liquids valve, prevent the decline of seal packing temperature through heating the valve rod to reach the purpose that improves sealed effect.
Referring to fig. 1, the utility model discloses a jet-propelled heating device includes annular trachea 2, the control valve 5 that heats, air supply pipe 6 and gas heater 7, dry compressed air is by gas heater 7 heating back, and the air supply pipe 6 that has the control valve 5 that heats gets into annular trachea 2, and the flange department of valve rod 1 is spouted to a plurality of air jets on the annular trachea 2 of rethread, even there is a small amount of gas to pass the gland packing and leaks like this, can not lead to the gland packing to meet the cold shrink yet to the emergence of valve rod weeping phenomenon has effectively been prevented. Practice proves that as long as the flange pressing part does not frost, the liquid leakage fault can not occur.
At the beginning of the use of the low-temperature liquid valve, if no liquid leakage occurs, the heating control valve 5 and the gas heater 7 can be closed. Once leakage of the low-temperature liquid valve is found, the valve flange is blown off by large-flow heated air, so that the sealing filler below the flange is heated to expand, leakage gaps are gradually reduced, and leakage of the valve is eliminated. Then the small flow heating air is used for heating for a long time, so that secondary liquid leakage of the valve can be prevented, and the shutdown treatment frequency is reduced.
Claims (5)
1. The utility model provides a cryogenic liquids valve with leak protection function, characterized by includes cryogenic liquids valve and jet-propelled heating device in the constitution, jet-propelled heating device includes annular trachea (2), air supply pipe (6) and gas heater (7), annular trachea (2) cover is outside in valve rod (1) of cryogenic liquids valve, be equipped with on the pipe wall of annular trachea (2) with valve rod (1) of cryogenic liquids valve and the air jet that is relative with pressing blue (3), the one end and the annular trachea (2) of air supply pipe (6) are connected, and the other end is connected with high pressurized air source, gas heater (7) are installed on air supply pipe (6).
2. A leakage-proof cryogenic liquid valve as claimed in claim 1, characterized in that the gas supply pipe (6) is provided with a heating control valve (5).
3. A cryogenic liquid valve having a leak-proof function according to claim 1 or 2, wherein the gas supplied by the high-pressure gas source is dry compressed air.
4. A cryogenic liquid valve with leak-proof function according to claim 3, characterized in that a plurality of gas nozzles are arranged on the annular gas pipe (2) and are uniformly distributed along the annular gas pipe (2).
5. A cryogenic liquid valve with leak-proof function according to claim 4, characterized in that the gas heater (7) is an electric heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921224634.XU CN210770621U (en) | 2019-07-31 | 2019-07-31 | Low-temperature liquid valve with leakage-proof function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921224634.XU CN210770621U (en) | 2019-07-31 | 2019-07-31 | Low-temperature liquid valve with leakage-proof function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210770621U true CN210770621U (en) | 2020-06-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921224634.XU Active CN210770621U (en) | 2019-07-31 | 2019-07-31 | Low-temperature liquid valve with leakage-proof function |
Country Status (1)
| Country | Link |
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| CN (1) | CN210770621U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113464662A (en) * | 2021-07-29 | 2021-10-01 | 洛阳三旋智能装备有限公司 | Material valve structure is got to reation kettle bottom |
-
2019
- 2019-07-31 CN CN201921224634.XU patent/CN210770621U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113464662A (en) * | 2021-07-29 | 2021-10-01 | 洛阳三旋智能装备有限公司 | Material valve structure is got to reation kettle bottom |
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| TR01 | Transfer of patent right |
Effective date of registration: 20230517 Address after: 056015 Fuxing Road 232, Fuxing District, Hebei, Handan Patentee after: HANDAN IRON & STEEL GROUP Co.,Ltd. Patentee after: Handan Branch of Hegang Co.,Ltd. Patentee after: HEBEI HANGANG XINRUI RARE GAS TECHNOLOGY Co.,Ltd. Address before: 056015 Fuxing Road 232, Fuxing District, Hebei, Handan Patentee before: HANDAN IRON & STEEL GROUP Co.,Ltd. Patentee before: Handan Branch of Hegang Co.,Ltd. Patentee before: HEBEI HANGANG RUIDA GAS Co.,Ltd. |