CN108547957B - Double-body valve and method for blocking internal leakage of valve gas material by high-pressure barrier medium - Google Patents
Double-body valve and method for blocking internal leakage of valve gas material by high-pressure barrier medium Download PDFInfo
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- CN108547957B CN108547957B CN201810335028.9A CN201810335028A CN108547957B CN 108547957 B CN108547957 B CN 108547957B CN 201810335028 A CN201810335028 A CN 201810335028A CN 108547957 B CN108547957 B CN 108547957B
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/003—Housing formed from a plurality of the same valve elements
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
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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
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
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- Mechanical Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
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Abstract
A double-body valve and a method for blocking leakage of valve gas materials by using high-pressure isolating media are provided, wherein an air inlet of a first valve is connected with an air outlet end of an upstream pipeline, an air outlet of a second valve is connected with an air inlet end of a downstream pipeline, a high-pressure isolating mechanism communicated with the air outlet of the first valve and the air inlet of the second valve is arranged between the air outlet of the first valve and the air inlet of the second valve, a high-pressure isolating liquid drain port is arranged at the bottom of a valve body of the second valve, the high-pressure isolating mechanism is filled with high-pressure isolating liquid between the air outlet of the first valve and the air inlet of the second valve when the first valve and the second valve are in a closed state, and the high-pressure isolating liquid is discharged through the high-pressure isolating liquid drain port when the first valve and the second valve are in a closed state, so that the air outlet of the first valve and the air inlet of the second valve are communicated to conduct the high-pressure gas materials. The invention can realize zero leakage when the valve is closed.
Description
Technical Field
The present invention relates to a valve. In particular to a double-body valve and a method for blocking gas material internal leakage of the valve by using a high-pressure isolating medium.
Background
The valve sealing structure in the prior art is shown in fig. 1, and when the valve is in a closed state, a valve core 5 is used for blocking an air passing hole in a valve body 6 to prevent high-pressure gas materials in an upstream pipeline 1 of the valve from being led to a downstream pipeline 2 of the valve to form low-pressure gas materials.
When the hand wheel 4 is rotated, the valve core 5 is driven to gradually separate from the gas passing hole of the valve body 6 to move upwards through the rotation of the valve rod 3, so that a gap is formed between the valve core 5 and the gas passing hole in the valve body 6, thereby leading the upstream pipeline 1 and the downstream pipeline 2 of the valve to be communicated, leading high-pressure gas materials in the upstream pipeline of the valve to flow to a low-pressure area of the downstream pipeline of the valve through the valve, and the flow rate of the high-pressure gas materials depends on the size of the gap between the valve core 5 and the gas passing hole in the valve body 6.
However, the above-described valve structure and operation principle of the prior art have a number of disadvantages which are difficult to overcome:
1. the gap between the valve core 5 and the air passing hole in the valve body 6 cannot be completely eliminated, but is relatively small, so that a trace amount of internal leakage always exists, and zero internal leakage cannot be achieved (the phenomenon that the material upstream of the valve flows to the downstream of the valve through the valve when the valve is closed is called internal leakage in the industry). But the current instrument is not yet able to detect it.
2. The gas permeability is much greater than the liquid permeability, so that if there is a gap, there must be a leak, and the valve cannot be closed 100%.
3. When repairing the equipment at the downstream of the valve, the terminal of the downstream pipeline is directly communicated with the atmosphere, and if the valve is internally leaked, gas materials leak into the atmosphere to pollute the environment and increase haze. The polluted atmosphere cannot be captured to form a cumulative effect, so that the purity of the atmosphere is lower and lower.
4. The materials are resources, and the leaked parts cannot be recovered, so that waste is caused, and the cost of chemical products is increased.
5. The gas material is actually toxic gas, which can induce human diseases.
Disclosure of Invention
The invention aims to solve the technical problem of providing a double-body valve and a method for blocking internal leakage of gas materials of a valve by using a high-pressure blocking medium, wherein the double-body valve can prevent the gas materials in an upstream pipeline of the valve from leaking into a downstream pipeline of the valve when the valve is in a closed state.
The technical scheme adopted by the invention is as follows: the utility model provides a with high pressure baffle medium blocking valve gas material internal leakage's double-body valve, includes first valve and second valve, the gas inlet connection of first valve is used for the gas outlet end of the high pressure gas material's the upstream pipeline of input, the gas outlet connection of second valve is used for exporting the gas inlet end of the low pressure gas material's low-pressure pipeline, be provided with between the gas outlet of first valve and the gas inlet of second valve with the gas inlet of first valve be used for adopting high pressure baffle liquid to block first valve and second valve internal leakage's high pressure baffle mechanism, the valve body bottom of second valve is provided with high pressure baffle liquid drain, high pressure baffle mechanism be in when first valve and second valve are in the closed state, be full of the high pressure baffle liquid that is used for blocking high pressure gas material from the gas outlet of first valve inflow second valve and follow the gas outlet of second valve between the gas inlet of second valve, when need carry out high pressure gas material and lead-out, be in high pressure baffle liquid outlet and second valve and open the high pressure liquid outlet when the second valve is in the high pressure baffle liquid outlet of first valve and second valve through the gas inlet and second valve, high pressure baffle liquid outlet and second valve open the gas outlet when the high pressure valve is in the second valve is in the state of second valve through the gas inlet and the gas inlet.
The high-pressure isolating mechanism comprises: one end is fixedly connected to the air outlet of the first valve through a screw, the other end is fixedly connected to a connecting pipe on the air inlet side of the second valve through a screw, a liquid inlet communicated with the inside of the connecting pipe is formed in the upper side wall of the connecting pipe, and the liquid inlet is connected to a liquid outlet of an accumulator for injecting high-pressure barrier liquid into the air outlet of the first valve, the connecting pipe and the air inlet of the second valve through a barrier liquid infusion pipe.
The utility model provides a with high pressure isolation medium blocks two body valves of valve gas material internal leakage, includes first valve and second valve, the gas inlet connection of first valve is used for the gas outlet end of the high pressure gas material's the upstream pipeline of input, the gas outlet connection of second valve is used for exporting the gas inlet end of the low pressure gas material's low-pressure pipeline, be provided with between the gas outlet of first valve and the gas inlet of second valve with the high pressure isolation mechanism that is used for adopting high pressure gas to block first valve and second valve internal leakage that is linked together of gas outlet of first valve and the gas inlet of second valve, the valve body bottom of second valve is provided with high pressure gas vent, high pressure isolation mechanism be full of and be used for blocking high pressure gas material from the gas outlet of first valve to flow into the second valve and follow the high pressure isolation gas of the gas outlet of second valve when the high pressure gas material is led out, be in first valve and second valve and close the state when high pressure gas material is in the gas outlet, high pressure isolation mechanism that is in the high pressure gas outlet and the second valve high pressure gas outlet is opened simultaneously through the first valve and the gas outlet of second valve when the high pressure gas material is led out.
The high-pressure isolating mechanism comprises: one end is fixedly connected to the air outlet of the first valve through a screw, the other end is fixedly connected to the air connecting pipe at the air inlet side of the second valve through a screw, an air inlet communicated with the inside of the air connecting pipe is formed in the upper side wall of the air connecting pipe, one end of an air inlet pipe for injecting high-pressure barrier air into the air outlet of the first valve, the air connecting pipe and the air inlet of the second valve is connected to the air inlet, and the other end of the air inlet pipe is connected with an external high-pressure air supply device.
The high-pressure barrier gas is high-pressure nitrogen or high-pressure air.
A leakage-proof method for the dual-body valve for blocking the leakage of gas material features that the high-pressure isolating medium between two valves is used to cut off the toxic gas material communication between upstream and downstream pipelines of valve, so effectively preventing the leakage of gas material.
According to the double-body valve and the method for blocking the internal leakage of the valve gas material by using the high-pressure isolating medium, after the valve is closed, the gas material in the upstream pipeline of the valve is effectively prevented from leaking into the downstream pipeline of the valve, and zero leakage can be achieved. The method has the following advantages:
1. the valve has no leakage path.
2. The gas 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 is prevented and not needed.
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 when closed;
FIG. 2 is a schematic view of a first embodiment of a two-piece valve of the present invention;
fig. 3 is a schematic structural view of a second embodiment of the two-body valve of the present invention.
In the figure
A: first valve B: second valve
1: high pressure gas feed upstream 2: low pressure gaseous material downstream
3: valve spindle 4: hand wheel
5: valve core 6: valve seat
11: upstream line 12: downstream pipeline
13: valve shaft 14: hand wheel
15: valve core 16: valve seat
17: high pressure barrier fluid 18: barrier liquid infusion tube
19: high pressure nitrogen or high pressure air 20: energy accumulator
21: liquid inlet 22: high-pressure barrier liquid drain port
23: high pressure liquid and gas injection ports 24: connecting pipe
25: high-pressure gas exhaust port 26: high pressure barrier gas
27: gas connection tube 28: air inlet
29: air inlet pipe
Detailed Description
The following is a detailed description of the two-body valve and method of blocking leakage of valve gas material with high pressure barrier medium according to the present invention with reference to the examples and drawings.
The double-body valve for blocking the internal leakage of the valve gas material by using the high-pressure isolating medium is characterized in that clean liquid or gas with pressure higher than that of the high-pressure gas material is communicated in a closed cavity formed between the two valves, the liquid is poorer than the gas permeability, and the low-pressure gas material cannot leak into the high-pressure clean gas or liquid due to the existence of pressure difference. The high pressure clean gas or liquid is a low pressure gaseous material on both sides, so if there is a small leak it must be that the high pressure clean liquid or gas leaks into the low pressure gaseous material on both sides, and the clean gas or clean liquid is not harmful to the gaseous material nor to the atmosphere, for example: nitrogen, air or clear water, etc. As shown in fig. 2, an energy storage tank is arranged outside the two valve housings and is connected to the cleaning liquid in order to ensure a stable pressure. Or as shown in fig. 3, a high-pressure clean air source with stable pressure is connected to the outside between the two valve shells.
As shown in fig. 2, the double-body valve for blocking the internal leakage of valve gas materials by using high-pressure blocking media comprises a first valve a and a second valve B, wherein an air inlet of the first valve a is connected with an air outlet end of an upstream pipeline 11 for inputting high-pressure gas materials, an air outlet of the second valve B is connected with an air inlet end of a downstream pipeline 12 for outputting low-pressure gas materials, a high-pressure blocking mechanism which is communicated with an air outlet of the first valve a and an air inlet of the second valve B and is used for blocking the internal leakage of the first valve a and the second valve B by using high-pressure blocking media is arranged between the air outlet of the first valve a and the air inlet of the second valve B, a high-pressure blocking liquid drain 22 is arranged at the bottom of a valve body of the second valve B, when the first valve a and the second valve B are in a closed state, the high-pressure blocking mechanism is filled with an air inlet end for blocking the high-pressure gas materials from the air outlet of the first valve a to the second valve B and is required to be discharged from the air outlet of the second valve B, and when the high-pressure blocking mechanism is required to be connected with the high-pressure blocking liquid drain 22 from the first valve a and the second valve B to the high-pressure blocking mechanism, and when the high-pressure blocking liquid is required to be discharged from the first valve a and the high-pressure blocking mechanism is required to be opened, and the high-pressure blocking liquid material is required to be discharged from the high-pressure blocking mechanism is connected with the air inlet of the second valve B to be opened, and the high-pressure blocking valve B, and when the high-pressure blocking mechanism is required to be opened, and the high pressure blocking liquid blocking valve is required to be discharged.
The high-pressure isolating mechanism comprises: one end is fixedly connected to the air outlet of the first valve A through a screw, the other end is fixedly connected to the connecting pipe 24 on the air inlet side of the second valve B through a screw, a liquid inlet 21 communicated with the inside of the connecting pipe 24 is formed in the upper side wall of the connecting pipe 24, and the liquid inlet 21 is connected to a liquid outlet of the accumulator 20 for injecting high-pressure blocking liquid 17 into the air outlet of the first valve A, the connecting pipe 24 and the air inlet of the second valve B through a blocking liquid infusion tube 18.
As shown in fig. 3, the double-body valve for blocking the internal leakage of valve gas materials by using high-pressure blocking media comprises a first valve a and a second valve B, wherein an air inlet of the first valve a is connected with an air outlet end of an upstream pipeline 11 for inputting high-pressure gas materials, an air outlet of the second valve B is connected with an air inlet end of a downstream pipeline 12 for outputting low-pressure gas materials, a high-pressure blocking mechanism which is communicated with an air outlet of the first valve a and an air inlet of the second valve B and is used for blocking the internal leakage of the first valve a and the second valve B by using high-pressure gas is arranged between the air outlet of the first valve a and the air inlet of the second valve B, a high-pressure gas exhaust port 25 is arranged at the bottom of a valve body of the second valve B, when the first valve a and the second valve B are in a closed state, the high-pressure blocking mechanism is filled with an air inlet end for blocking the high-pressure gas materials from the air outlet of the first valve a to the second valve B and is discharged from the air outlet of the second valve B, when the high-pressure gas is required to be blocked by the first valve a and the second valve B, and when the high-pressure gas is required to be discharged from the first valve a and the second valve B is required to be in a closed state, and when the high-pressure gas is required to be discharged from the high-pressure blocking mechanism is required to be connected with the high-pressure gas inlet 25 a and the second valve B, and the high-pressure gas inlet 25 is opened when the high-pressure gas is required to be discharged from the first valve a and the high-pressure valve B.
The high-pressure isolating mechanism comprises: one end is fixedly connected to the air outlet of the first valve A through a screw, the other end is fixedly connected to the air connecting pipe 27 on the air inlet side of the second valve B through a screw, an air inlet 28 communicated with the inside of the air connecting pipe 27 is formed on the upper side wall of the air connecting pipe 27, one end of an air inlet pipe 29 for injecting high-pressure blocking air 26 into the air outlet of the first valve A, the air connecting pipe 27 and the air inlet of the second valve B is connected to the air inlet 28, and the other end of the air inlet pipe 29 is connected with an external high-pressure air supply device. The high pressure barrier gas 26 is high pressure nitrogen or high pressure air.
As shown in fig. 2, when the upstream pipeline 11 and the downstream pipeline 12 for conveying toxic material gas or liquid with a certain pressure are cut off, the valve rotating shaft 13 is rotated, the valve rotating shaft 13 is axially displaced while self-conveying, and when the clearance between the valve core 15 and the valve seat 16 is zero after the valve core 15 is in rigid contact with the valve seat 16, high-pressure clean high-pressure barrier liquid 17 is injected between the two valves, such as: and (5) clean water. In order to maintain the pressure of the clean liquid, a blocking liquid infusion tube 18 is connected to the liquid inlet 21, the other end of the blocking liquid infusion tube 18 is communicated with the interior of the accumulator 20, the lower half part of the accumulator 20 is filled with the clean liquid and is communicated with a closed cavity formed between two valves, and the upper half part of the accumulator 20 is filled with high-pressure nitrogen or high-pressure air to maintain the pressure of the interior of the accumulator 20 to be higher than the pressure of the gas materials of the upstream pipeline 11 and the downstream pipeline 12 of the valves. The high-pressure barrier liquid 17 is injected into a closed cavity formed between the two valves through the energy accumulator 20, and the gas material in the upstream pipeline 11 of the valve is thoroughly cut off from flowing into the downstream pipeline 12 of the valve due to the existence of the high-pressure barrier liquid 17, so that zero leakage of the gas material is realized.
When the valve upstream line 11 and the valve downstream line 12 need to be connected, the high pressure barrier drain 22 is opened, and all the high pressure barrier 17 is discharged, including the high pressure barrier inside the accumulator 20. After the liquid inlet 21 and the high-pressure barrier liquid outlet 22 are closed, two valves are opened, and an upstream pipeline 11 and a downstream pipeline 12 of the two valves can be connected.
As shown in fig. 3, when the upstream pipeline 11 and the downstream pipeline 12 for conveying toxic material gas or liquid with a certain pressure are cut off, the valve rotating shaft 13 is rotated, the valve rotating shaft 13 is axially displaced while self-conveying, and when the clearance between the valve core 15 and the valve seat 16 is zero after the valve core 15 is in rigid contact, high-pressure blocking gas 26 is injected between the two valves, for example: nitrogen or air. In order to maintain the pressure of the high pressure barrier gas 26 at the inlet 28, an inlet pipe 29 is connected, the other end of the inlet pipe 29 is connected to an external clean gas pressure source, which is in communication with a closed chamber formed between the two valves, the pressure of the external pressure source being at a time greater than the pressure of the gaseous material between the upstream line 11 and the downstream line 12 of the valves. The high-pressure gas material in the upstream pipeline 11 of the valve is thoroughly cut off from flowing into the downstream pipeline 12 of the valve due to the existence of the high-pressure barrier gas 26 between the two valves, so that zero leakage of the gas material is realized.
When the upstream line 11 and the downstream line 12 of the valve need to be connected, the high-pressure gas exhaust port 25 is opened, the gas inlet 28 is closed to cut off the gas source, and after all clean high-pressure barrier gas 26 is discharged, the high-pressure gas exhaust port 25 is closed. Ensuring that both valves are opened after closing the inlet 28 and the high pressure gas outlet 25, the upstream line 11 and the downstream line 12 of both valves can be connected.
The double-body valve for blocking the internal leakage of the valve gas material by adopting the high-pressure blocking medium disclosed by the invention has the advantages that the high-pressure clean blocking liquid between the two valves is utilized to cut off the communication of the gas material of the pipeline at the upstream and downstream of the valve, the internal leakage of the valve is effectively solved, and when the micro leakage occurs, the micro leakage can only be the clean liquid micro leakage, so that the zero leakage of the gas material is realized.
The leakage-proof method of the double-body valve for blocking the internal leakage of the valve gas material by using the high-pressure isolating medium is to cut off the communication of the toxic gas material of the pipeline at the upstream and downstream of the valve by using the higher pressure and clean high-pressure isolating medium between the two valves, so that the internal leakage of the valve is effectively solved, and the leakage of the valve can be only the leakage of clean liquid or gas in a trace amount in case of occurrence of the trace leakage, thereby realizing zero leakage of the toxic gas material.
Claims (4)
1. The double-body valve for blocking the gas material leakage of the valve by using high-pressure isolating medium comprises a first valve (A) and a second valve (B), wherein the gas inlet of the first valve (A) is connected with the gas outlet end of an upstream pipeline (11) for inputting the high-pressure gas material, the gas outlet of the second valve (B) is connected with the gas inlet end of a downstream pipeline (12) for outputting the low-pressure gas material, the double-body valve is characterized in that a high-pressure isolating mechanism which is communicated with the gas outlet of the first valve (A) and the gas inlet of the second valve (B) and is used for blocking the gas leakage of the first valve (A) and the second valve (B) by using high-pressure isolating liquid is arranged at the bottom of the valve body of the second valve (B), the high-pressure isolating mechanism is used for blocking the liquid outlet (22) when the first valve (A) and the second valve (B) are in a closed state, and is used for blocking the gas material from the first valve (A) and the second valve (B) when the high-pressure material is required to flow into the second valve (B) from the first valve (A) and the second valve (B) when the high-pressure isolating material is required to be in a closed state, the high-pressure blocking liquid (17) between the air outlet of the first valve (A) and the air inlet of the second valve (B) is discharged through the high-pressure blocking liquid discharge port (22), and then the high-pressure blocking liquid discharge port (22) is closed, and the first valve (A) and the second valve (B) are opened at the same time, so that the air outlet of the first valve (A) and the air inlet of the second valve (B) are communicated to conduct the export of high-pressure gas materials;
the high-pressure isolating mechanism comprises: one end is fixedly connected to the air outlet of the first valve (A) through a screw, the other end is fixedly connected to the connecting pipe (24) at the air inlet side of the second valve (B) through a screw, a liquid inlet (21) communicated with the inside of the connecting pipe (24) is formed in the upper side wall of the connecting pipe (24), the liquid inlet (21) is connected to the air outlet of the first valve (A) through a blocking liquid infusion tube (18), the connecting pipe (24) and the liquid outlet of an accumulator (20) for injecting high-pressure blocking liquid (17) into the air inlet of the first valve (A) and the air inlet of the second valve (B), a closed cavity formed between clean liquid and the first valve (A) and the second valve (B) is formed in the lower half of the accumulator (20), and the upper half of the accumulator (20) is filled with high-pressure nitrogen or high-pressure air to keep the pressure inside the accumulator (20) at a moment greater than the pressure of gas materials between an upstream pipeline (11) and a downstream pipeline (12) flowing through the first valve (A) and the second valve (B).
2. The double-body valve for blocking the internal leakage of valve gas materials by using high-pressure isolating media comprises a first valve (A) and a second valve (B), wherein an air inlet of the first valve (A) is connected with an air outlet end of an upstream pipeline (11) for inputting the high-pressure gas materials, an air outlet of the second valve (B) is connected with an air inlet end of a downstream pipeline (12) for outputting the low-pressure gas materials, the double-body valve is characterized in that a high-pressure isolating mechanism which is communicated with an air outlet of the first valve (A) and an air inlet of the second valve (B) and used for blocking the internal leakage of the first valve (A) and the second valve (B) by using the high-pressure gas is arranged between the air outlet of the first valve (A) and the air inlet of the second valve (B), a high-pressure gas exhaust port (25) is arranged at the bottom of a valve body of the second valve (B), when the first valve (A) and the second valve (B) are in a closed state, the high-pressure isolating mechanism is fully filled between the air outlet of the first valve (A) and the second valve (B) and used for isolating the high-pressure materials when the high-pressure materials are required to flow out of the first valve (B) and the second valve (B) from the high-pressure isolating mechanism (26), the high-pressure gas exhaust port (25) is used for exhausting high-pressure barrier gas (26) between the gas outlet of the first valve (A) and the gas inlet of the second valve (B), and then the high-pressure gas exhaust port (25) is closed, and the first valve (A) and the second valve (B) are opened at the same time, so that the gas outlet of the first valve (A) and the gas inlet of the second valve (B) are communicated to conduct the export of high-pressure gas materials;
the high-pressure isolating mechanism comprises: one end is in through screw fixed connection on the gas outlet of first valve (A), the other end is in through screw fixed connection gas connecting pipe (27) of the air inlet side of second valve (B), be formed with on the upper lateral wall of gas connecting pipe (27) with air inlet (28) that are linked together inside gas connecting pipe (27), be connected on air inlet (28) and be used for to the gas outlet of first valve (A), the one end of the air inlet pipe (29) of high pressure resistant isolation gas (26) is poured into in the air inlet of gas connecting pipe (27) and second valve (B), the outside high pressure gas air feeder is connected to the other end of air inlet pipe (29), a closed cavity that forms between outside high pressure gas feeder and first valve (A) and the second valve (B) communicates with each other, the pressure moment of the gas pressure source of outside high pressure gas feeder is greater than the pressure of gas material between the upstream pipeline (11) and downstream pipeline (12) of first valve (A) and second valve (B).
3. The two-part valve for blocking leakage of valve gas material with high pressure barrier medium according to claim 2, wherein the high pressure barrier gas (26) is high pressure nitrogen or high pressure air.
4. A leakage prevention method of a double-body valve for blocking internal leakage of valve gas materials by using high-pressure blocking medium as claimed in claim 1 or claim 2 is characterized in that the toxic gas materials of the pipelines at the upstream and downstream of the valve are blocked by using the high-pressure blocking medium which is higher in pressure between the two valves, so that the internal leakage of the valve is effectively solved, and only clean liquid or gas can be leaked in trace quantity in case of trace leakage, thereby realizing zero leakage of the toxic gas materials.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810335028.9A CN108547957B (en) | 2018-04-15 | 2018-04-15 | Double-body valve and method for blocking internal leakage of valve gas material by high-pressure barrier medium |
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| CN201810335028.9A CN108547957B (en) | 2018-04-15 | 2018-04-15 | Double-body valve and method for blocking internal leakage of valve gas material by high-pressure barrier medium |
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| CN109826967A (en) * | 2019-02-27 | 2019-05-31 | 武汉市宇驰检测技术有限公司 | A kind of preventing water leakage oil leak switch |
| CN112005812A (en) * | 2020-09-23 | 2020-12-01 | 翔天菌业集团股份有限公司 | Conveying isolation device for raw materials for cultivating edible fungi between tank bodies |
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| JP3288442B2 (en) * | 1992-09-08 | 2002-06-04 | 富士通株式会社 | Air operated valve |
| JP2011021672A (en) * | 2009-07-15 | 2011-02-03 | Ihi Corp | Ball valve, and method of inspecting leakage in the same |
| CN101900212A (en) * | 2010-05-04 | 2010-12-01 | 四川赛尔阀门制造有限公司 | High-pressure large-caliber duplex gathering ball valve |
| CN201992140U (en) * | 2011-05-11 | 2011-09-28 | 长岭炼化岳阳工程设计有限公司 | Dual-valve structured high-pressure socket-welded gate valve |
| CN107701740A (en) * | 2017-11-22 | 2018-02-16 | 安徽省屯溪高压阀门有限公司 | A kind of double-rod structure high-pressure stop valve |
| CN208295150U (en) * | 2018-04-15 | 2018-12-28 | 天津长瑞大通流体控制系统有限公司 | It is a kind of to block the binary valve leaked in valve gas material with high pressure barrier medium |
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| CN108547957A (en) | 2018-09-18 |
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