CN108087621B - Sealing system and method for cutting off leakage of valve by using high-pressure barrier liquid - Google Patents
Sealing system and method for cutting off leakage of valve by using high-pressure barrier liquid Download PDFInfo
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- CN108087621B CN108087621B CN201810088685.8A CN201810088685A CN108087621B CN 108087621 B CN108087621 B CN 108087621B CN 201810088685 A CN201810088685 A CN 201810088685A CN 108087621 B CN108087621 B CN 108087621B
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- valve
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- valve cover
- blocking
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Devices (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a sealing system and a sealing method for sealing an external leakage of a liquid cut-off valve by utilizing high pressure, and the sealing system comprises a valve rod, wherein an atmosphere end pressure sleeve, an atmosphere end valve cover and a material end valve cover are sleeved on the valve rod in a sequentially sliding fit manner along the direction from the outer side to the inner side of a valve body, two groups of packing seals are arranged in series in the atmosphere end valve cover and the material end valve cover, a closed cavity is formed between the two groups of packing seals, high-pressure pollution-free pure liquid injected from the outside is arranged between the two groups of packing seals, the two ends of the pure liquid are respectively a material end and an atmosphere end with the pressure lower than the pressure of the pure liquid, and when the trace leakage happens, the trace leakage of the pure liquid can be realized. And the working condition of the valve can be prejudged by observing and controlling the liquid level in the energy storage tank and the pressure in the tank, so that the valve is prevented and not needed.
Description
Technical Field
The invention relates to a system for preventing leakage of a valve. In particular to a sealing system and a sealing method for blocking leakage of a valve by using high-pressure barrier liquid.
Background
The valve sealing structure in the prior art is shown in fig. 1, on a valve rod 1, a valve pressing sleeve 2 and a valve cover 3 are sequentially arranged from the outer side of the valve to the inner side of the valve through threaded connection, wherein a groove is formed at the outer end of the valve cover 3 around the axis, the lower part of the valve pressing sleeve 2 is embedded in the groove of the valve cover 3 and is in threaded connection with the valve cover 3, and a filler 4 for reducing leakage of high-pressure gas or liquid materials 5 in the valve to an atmosphere end 6 is arranged between the lower end of the valve pressing sleeve 2 and the groove of the valve cover 3.
In operation of the valve of the prior art, the material 5 inside the valve cover 3 is a high pressure gas or liquid material, the outside of the valve cover 3 is a low pressure atmosphere 6, and the rotating valve stem 1 passes from the outside of the valve cover 3 to the inside of the valve cover 3. In order to reduce leakage, a packing 4 is arranged between the rotary valve rod 1 and the valve cover 3, wherein the packing 4 is a plurality of packing, sealing or annular parts playing a role in throttling, and a leakage channel between the static valve cover 3 and the rotary valve rod 1 is blocked. Once leakage occurs, the valve pressing sleeve 2 is rotated to axially compress the packing 4, and radial force is generated due to plastic deformation of the packing, so that the outer diameter of the packing 4 is tightly attached to the valve cover 3, and meanwhile, the inner diameter of the packing 4 is tightly attached to the valve rod 1, so that the purpose of preventing leakage is achieved. If the leakage is repeated, the leakage is followed.
However, the above-described valve structure and operation principle of the prior art have a number of disadvantages which are difficult to overcome:
1. there is no absolute or relative world, so trace leakage exists all the time and zero leakage cannot be achieved. But the current instrument is not yet able to detect it.
4. The material gas leaks to the atmosphere to pollute the environment and increase haze.
5. The material itself is a resource and leakage causes waste.
6. The leakage quantity of the valve can be gradually increased along with the time, and the sudden increase of the leakage quantity or the sudden exceeding of the leakage quantity cannot be timely known.
7. Measures can be taken only after the leakage is increased and manually found, and the judgment cannot be performed in advance, so that the prevention cannot be realized.
Disclosure of Invention
The invention aims to solve the technical problem of providing a sealing system and a sealing method for preventing leakage of a high-pressure gas or liquid material into the atmosphere by using a high-pressure barrier liquid cut-off valve.
The technical scheme adopted by the invention is as follows: the utility model provides an utilize sealing system of high pressure resistance liquid shut-off valve external leakage, includes the valve rod, the valve rod on along the outside of valve body direction of inwards side in proper order sliding fit's cover have atmospheric end press cover, atmospheric end valve gap and material end valve gap, wherein, the atmospheric end of atmospheric end valve gap be formed with inwards concave first recess, the lower part embedding of atmospheric end press cover be in the first recess, and with first recess threaded connection, the bottom of atmospheric end press cover with the tank bottom of first recess between be formed with the atmospheric end packing seal storehouse that is used for setting up the packing, the material end of atmospheric end valve gap be formed with a round concave ring inwards concave ring, the inner ring wall embedding of the concave ring that constitutes the atmospheric end valve gap is in the second recess of material end valve gap, thereby, the material end valve gap is formed with the second recess the end embedding in the first recess, and with the first recess of first recess form between the bottom of valve rod, the first recess is used for setting up the material end, the material end is formed with the first recess, the material end is used for the first recess is formed with the inner wall of material end seal storehouse, the material end is formed with the inner side wall of the material end seal storehouse is formed with the material end, the material end is formed with the inner side seal chamber, and the material end is formed with the inner wall of the material end seal chamber is formed with the inner side between the first recess, the material end seal chamber is formed with the inner side and the material end seal chamber, and the material end and the inner side, the other end is communicated with a liquid injection channel of the external energy storage tank through a high-pressure blocking liquid pipe.
And the packing in the atmosphere end packing sealing bin and the packing in the material end packing sealing bin are tightly matched with the valve rod.
An O-shaped sealing ring is arranged between the material end valve cover and the outer annular wall of the concave ring of the atmosphere end valve cover.
The first separation liquid cavity is formed in the cover body between the atmosphere end packing sealing bin and the inner annular wall of the atmosphere end valve cover, the second separation liquid cavity is formed between the annular bottom of the concave ring of the atmosphere end valve cover and the material end valve cover, and a liquid passing channel with one end communicated with the first separation liquid cavity and the other end communicated with the second separation liquid cavity is formed on the cover body between the first separation liquid cavity and the second separation liquid cavity.
A material zero leakage method using high pressure to isolate liquid is to set two groups of packing seals in series in valve for sealing material, the interval between two groups of packing seals is provided with high pressure pollution-free pure liquid flowing from outside, two ends of the pure liquid are material end and atmosphere end with pressure lower than that of the pure liquid, when micro leakage occurs, only the pure liquid micro leakage can be realized, thus realizing zero leakage of material.
The sealing system and the method for the leakage of the shut-off valve by utilizing the high-pressure isolating liquid rely on a sealed cavity formed between two sets of packing seals, pure liquid with pressure higher than that of gas or liquid materials is communicated in the cavity, and low-pressure gas or liquid materials cannot leak into the high-pressure pure liquid due to the existence of pressure difference. The high pressure pure liquid is on one side a material gas or liquid with lower pressure and on the other side an atmosphere with lower pressure, so if there is a small leak, the pure liquid must leak to the material or to the atmosphere, and the pure liquid is not harmful to the material nor to the atmosphere, for example: clear water, etc. An energy storage tank is arranged outside the valve housing and is connected to the pure liquid to ensure a stable pressure. The invention has the following advantages:
1. there is no leakage path.
2. The material is a resource, and zero leakage saves energy and reduces emission
3. The working condition of the valve can be prejudged by observing and controlling the liquid level in the energy storage tank and the pressure in the tank, so that the valve can be prevented and not happened.
4. The interchangeability of transformation is strong, and the investment is small.
5. The maintenance is convenient.
Drawings
FIG. 1 is a schematic diagram of a prior art valve seal;
fig. 2 is a schematic diagram of the sealing system of the present invention utilizing high pressure to isolate leakage from a fluid shut-off valve.
In the figure
1: valve rod 2: valve pressing sleeve
3: valve cover 4: packing material
5: material 6: atmospheric air at low pressure
7: atmospheric end jacket 8: atmospheric end valve cover
8.1: first recess 8.2: concave ring
8.21: inner annular wall 8.22: outer annular wall
8.3: the liquid passage 9: atmospheric end packing sealing bin
10: first barrier fluid chamber 11: second barrier liquid chamber
12: material end packing seal bin 13: material end valve cover
13.1: second groove 14: o-shaped sealing ring
15: high pressure barrier fluid tube 16: energy storage tank
17: high pressure barrier fluid 18: liquid injection channel
Detailed Description
The following describes in detail the sealing system and method of the present invention using high pressure barrier liquid shut-off valve leakage with reference to the examples and figures.
As shown in fig. 2, the sealing system for external leakage of the shut-off valve by using high-pressure barrier liquid according to the invention comprises a valve rod 1, wherein an atmosphere end pressing sleeve 7, an atmosphere end valve cover 8 and a material end valve cover 13 are sleeved on the valve rod 1 in a sliding fit manner along the direction from the outer side to the inner side of the valve body, a first concave groove 8.1 which is inwards concave is formed at the atmosphere end of the atmosphere end valve cover 8, the lower part of the atmosphere end pressing sleeve 7 is embedded in the first concave groove 8.1 and is in threaded connection with the first concave groove 8.1, an atmosphere end packing sealing bin 9 for arranging packing 4 is formed between the bottom end of the atmosphere end pressing sleeve 7 and the bottom of the first concave groove 8.1, a circle of concave ring 8.2 which is inwards concave is formed at the material end of the atmosphere end valve cover 8, a second concave groove 13.1 which is inwards concave is formed at one end close to the atmosphere end valve cover 8, the inner annular wall 8.21 of the concave ring 8.2 forming the air end valve cover 8 is embedded in the second groove 13.1 of the material end valve cover 13, so that the end of the material end valve cover 13 with the second groove 13.1 is embedded in the concave ring 8.2 of the air end valve cover 8, the inner side wall of the second groove 13.1 is in threaded connection with the inner annular wall 8.21, the inner annular wall 8.21 is in sliding fit with the valve rod 1, a material end packing seal bin 12 for arranging packing 4 is formed between the bottom end of the inner annular wall 8.21 of the concave ring 8.2 of the air end valve cover 8 and the bottom of the second groove 13.1 of the material end valve cover 13, a first blocking liquid cavity 10 for injecting high pressure blocking liquid 17 is formed between the air end valve cover 8 and the valve rod 1, a second liquid blocking liquid cavity 11 for injecting high pressure blocking liquid 17 is formed between the air end valve cover 8 and the material end valve cover 13, the first blocking liquid cavity 10 is communicated with the second blocking liquid cavity 11, and a liquid injection channel 18 with one end communicated with the first blocking liquid cavity 10 and the other end communicated with an external energy storage tank 16 through a high-pressure blocking liquid pipe 15 is formed on the cover body of the air end valve cover 8.
An O-shaped sealing ring 14 is arranged between the material end valve cover 13 and the outer annular wall 8.22 of the concave ring 8.2 of the atmosphere end valve cover 8.
The first blocking liquid cavity 10 is formed in the cover body between the air end packing seal bin 9 and the inner annular wall 8.21 of the air end valve cover 8, the second blocking liquid cavity 11 is formed between the annular bottom of the concave ring 8.2 of the air end valve cover 8 and the material end valve cover 13, and the air end valve cover 8 is formed with a liquid passage 8.3 with one end communicated with the first blocking liquid cavity 10 and the other end communicated with the second blocking liquid cavity 11 on the cover body between the first blocking liquid cavity 10 and the second blocking liquid cavity 11.
The working process of the sealing system for blocking leakage of the valve by utilizing high-pressure liquid is as follows:
when a pipeline for conveying toxic material gas or liquid with certain pressure is cut off, the valve rod 1 is rotated, the valve rod 1 carries out axial displacement while self-transmission, at the moment, gaps are generated between the outer surface of the valve rod 1 and the inner surface of the filler 4, the inner surfaces of the atmosphere end valve cover 8 and the material end valve cover 13, the inner surfaces of the atmosphere end filler seal bin 9 and the material end filler seal bin 12 and the outer surface of the filler 4, so that leakage is easy to occur; similarly, when the pipeline for conveying the poisonous gas or liquid with certain pressure is connected or the valve rod 1 is in a static state, high-pressure pure harmless liquid still exists between the two groups of packing seals to block the poisonous gas or liquid of the materials from directly communicating with the atmosphere by utilizing the gap, so that zero leakage of the poisonous gas or liquid of the materials can still be completely realized.
According to the material zero leakage method utilizing the high-pressure barrier liquid, two groups of packing seals are arranged in series in the valve for sealing the material, high-pressure pollution-free pure liquid flowing from the outside is arranged between the two groups of packing seals, two ends of the pure liquid are respectively a material end and an atmosphere end, the pressure of the material end is lower than that of the pure liquid, and when micro leakage occurs, the material can only be leaked in a micro way, so that zero leakage of the material is achieved.
Claims (2)
1. The utility model provides a utilize sealing system of high pressure to separate liquid trip valve leak outward, includes valve rod (1), its characterized in that, valve rod (1) go up along the outside of valve body inwards direction sliding fit cover in proper order have atmospheric end gland (7), atmospheric end valve lid (8) and material end valve gap (13), wherein atmospheric end of atmospheric end valve lid (8) be formed with first recess (8.1) of inwards concave, the lower part of atmospheric end gland (7) imbeds in first recess (8.1) and with first recess (8.1) threaded connection, the bottom of atmospheric end gland (7) with the tank bottom of first recess (8.1) between be formed with and be used for setting up atmospheric end packing seal storehouse (9) of filler (4), the material end of atmospheric end valve lid (8) be formed with round concave ring (8.2) inwards concave, material end valve lid (13) near atmospheric end valve lid (8) first recess (8.1) the material end (13) is formed with the recess (8.2), thereby the material end (13) is formed with second recess (8.1) the material end (13) is formed inwards concave ring (13) at the valve lid (8.2) the material end (13) is formed inwards concave ring (1) the recess (1), the inner side wall of the second groove (13.1) is in threaded connection with the inner annular wall (8.21), sliding fit is achieved between the inner annular wall (8.21) and the valve rod (1), a second blocking liquid cavity (11) for injecting high-pressure blocking liquid (17) is formed between the bottom end of the inner annular wall (8.21) of the concave ring (8.2) of the atmosphere end valve cover (8) and the groove bottom of the second groove (13.1) of the material end valve cover (13), a material end packing seal bin (12) for arranging packing (4) is formed between the bottom end of the atmosphere end valve cover (8) and the valve rod (1), a first blocking liquid cavity (10) for injecting high-pressure blocking liquid (17) is formed between the atmosphere end valve cover (8) and the material end valve cover (13), the first blocking liquid cavity (10) is communicated with the second blocking liquid cavity (11), and the atmosphere end valve cover (8) is communicated with the other end of the first blocking liquid channel (16) through the high-pressure blocking liquid channel (18) formed on the atmosphere end valve cover (8);
the packing (4) in the atmosphere end packing sealing bin (9) and the material end packing sealing bin (12) are tightly matched with the valve rod (1); an O-shaped sealing ring (14) is arranged between the material end valve cover (13) and the outer annular wall (8.22) of the concave ring (8.2) of the atmosphere end valve cover (8).
2. Sealing system for external leakage of a shut-off valve for liquid with high pressure according to claim 1, characterized in that the first liquid-blocking chamber (10) is formed in the cover between the air-end packing seal chamber (9) and the inner annular wall (8.21) of the air-end valve cover (8), the second liquid-blocking chamber (11) is formed between the annular bottom of the concave ring (8.2) of the air-end valve cover (8) and the material-end valve cover (13), and the liquid-passing channel (8.3) with one end communicating with the first liquid-blocking chamber (10) and the other end communicating with the second liquid-blocking chamber (11) is formed on the cover between the first liquid-blocking chamber (10) and the second liquid-blocking chamber (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810088685.8A CN108087621B (en) | 2018-01-30 | 2018-01-30 | Sealing system and method for cutting off leakage of valve by using high-pressure barrier liquid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810088685.8A CN108087621B (en) | 2018-01-30 | 2018-01-30 | Sealing system and method for cutting off leakage of valve by using high-pressure barrier liquid |
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| CN108087621A CN108087621A (en) | 2018-05-29 |
| CN108087621B true CN108087621B (en) | 2023-06-09 |
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| CN201810088685.8A Active CN108087621B (en) | 2018-01-30 | 2018-01-30 | Sealing system and method for cutting off leakage of valve by using high-pressure barrier liquid |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108533859A (en) * | 2018-07-11 | 2018-09-14 | 天津长瑞大通流体控制系统有限公司 | The sealing structure and encapsulating method of highly pressurised liquid or gas barrier formula flange |
| CN108644516A (en) * | 2018-08-06 | 2018-10-12 | 天津长瑞大通流体控制系统有限公司 | The threaded sealing structure and encapsulating method of highly pressurised liquid baffle type pipe connections |
| CN108644517A (en) * | 2018-08-06 | 2018-10-12 | 天津长瑞大通流体控制系统有限公司 | The flange seal nested structure and encapsulating method of highly pressurised liquid baffle type pipe connections |
| CN110185796A (en) * | 2019-05-25 | 2019-08-30 | 天津长瑞大通流体控制系统有限公司 | The shell and method with low creep system of high external pressure or high internal pressure can be resisted |
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|---|---|---|---|---|
| DE807342C (en) * | 1948-10-02 | 1951-06-28 | Kloeckner Humboldt Deutz Ag | Spindle seal |
| JPS4985452A (en) * | 1972-07-31 | 1974-08-16 | ||
| DE8304427U1 (en) * | 1983-06-09 | Seele, Wilfried, 4005 Meerbusch | Sealing packing for high temperature valves and sootblowers | |
| DE3534459A1 (en) * | 1985-03-15 | 1986-09-25 | Albrecht-Automatik GmbH & Co, 5024 Pulheim | Shaft seal |
| CN2100533U (en) * | 1991-04-11 | 1992-04-01 | 淄博化工设备厂 | Shunt valve |
| CN204083479U (en) * | 2014-09-09 | 2015-01-07 | 宣达实业集团浙江萨姆森自控阀门有限公司 | A kind of double seal filler valve |
| CN104329464A (en) * | 2014-10-30 | 2015-02-04 | 重庆山能仪表有限公司 | Safe packing seal structure |
-
2018
- 2018-01-30 CN CN201810088685.8A patent/CN108087621B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8304427U1 (en) * | 1983-06-09 | Seele, Wilfried, 4005 Meerbusch | Sealing packing for high temperature valves and sootblowers | |
| DE807342C (en) * | 1948-10-02 | 1951-06-28 | Kloeckner Humboldt Deutz Ag | Spindle seal |
| JPS4985452A (en) * | 1972-07-31 | 1974-08-16 | ||
| DE3534459A1 (en) * | 1985-03-15 | 1986-09-25 | Albrecht-Automatik GmbH & Co, 5024 Pulheim | Shaft seal |
| CN2100533U (en) * | 1991-04-11 | 1992-04-01 | 淄博化工设备厂 | Shunt valve |
| CN204083479U (en) * | 2014-09-09 | 2015-01-07 | 宣达实业集团浙江萨姆森自控阀门有限公司 | A kind of double seal filler valve |
| CN104329464A (en) * | 2014-10-30 | 2015-02-04 | 重庆山能仪表有限公司 | Safe packing seal structure |
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| CN108087621A (en) | 2018-05-29 |
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Effective date of registration: 20180910 Address after: 300393 A, No. 15 Chen Xing Road, Middle North Town, Xiqing District, Tianjin. Applicant after: TIANJIN CHANGRUI DATONG FLUID CONTROL SYSTEM CO.,LTD. Address before: 300192 Nankai District Xin Bai Yuan Road, Tianjin, 11-3-701 Applicant before: Xing Tianyi |
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