CN207074106U - A kind of double-piston valve leakage detection apparatus - Google Patents
A kind of double-piston valve leakage detection apparatus Download PDFInfo
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- CN207074106U CN207074106U CN201721078452.7U CN201721078452U CN207074106U CN 207074106 U CN207074106 U CN 207074106U CN 201721078452 U CN201721078452 U CN 201721078452U CN 207074106 U CN207074106 U CN 207074106U
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Abstract
It the utility model is related to the technical field of detection device in Natural gas pipeline system curing means, a kind of more particularly to double-piston valve leakage detection apparatus, double-piston valve leakage detection apparatus is connected to valve to be hunted leak, double-piston valve leakage detection apparatus includes nitrogen cylinder, pressure gauge, atmospheric valve, nitrogen cylinder is connected with valve to be hunted leak by pressure piping, and pressure gauge and atmospheric valve are provided with pressure piping.Nitrogen cylinder and valve to be hunted leak are connected by pressure piping, pressure gauge is set on pressure piping, inflated from nitrogen cylinder by pressure piping to valve to be hunted leak, after the blowing pressure reaches the examination criteria of the bearing capacity of valve to be detected, valve is detected with the presence or absence of leakage by observing the numerical value change of the pressure gauge on pressure piping.Stop valve is set, ventilated by stop valve to regulate and control nitrogen cylinder into pressure piping.The nitrogen for setting nitrogen recycling bottle to use back and forth in Acceptance Tests.Can be under the conditions of without pressure, simple, quick, analysis goes out the running situation of valve.
Description
Technical field
The technical field of detection device in Natural gas pipeline system curing means is the utility model is related to, more particularly to it is a kind of
Double-piston valve leakage detection apparatus.
Background technology
With the development of modern science and technology, valve is in the side such as industry, building, agricultural, national defence, scientific research and people's lives
Face as indispensable universal machine product in the every field of mankind's activity, is made to valve using more prevalent
More and more higher is required with security performance and sealing property etc..Valve is a kind of important fluid control devices and pressure-bearing member in pipeline
Part, pressure test be the important step in its production process, and carry out the important means of performance evaluation to it, wherein, gas
The Micro blazed-grating detection of leakage test annoyings whole industry for a long time.Generally, pipeline valve at the construction field (site) is installed and used
It is required for detecting its sealing before, accomplishes that " zero " leaks, because if occurring leakage phenomenon in use, this
When to re-replace valve just comparatively laborious, maintenance is also relatively difficult, it usually needs spends more human and material resources.Valve leak
Main Types be divided into leakage and interior leakage, and the general more difficult discovery of the interior leakage of valve, the but safe operation to valve produce great
Influence, easily cause the serious accident of burst, as working media is contaminated, some fire explosions, intoxication accident are all by valve
Caused by leakage.Especially when valve, which is in, pressure state, it is easier to leak.If leakage phenomenon be present in valve, by
This caused fire, blast, poisoning, scald accident cause inferior product quality, energy waste, equipment corrosion, material to increase
Consumption, environmental pollution, or even the accidents such as stopping production are caused, it has been of common occurrence.
Valve, which produces the reason for leaking, mainly two kinds of situations, first, interior leakage；Second, leakage.Valve leaks main original in producing
Because being caused by sealing pair is deformed under low-temperature condition.Material is set to cause volume to become when producing phase transformation when medium temperature drops to
Change, the very high sealing surface of script grinding precision is produced buckling deformation and is caused low temperature seal bad.We are once to DN250 valves
Low-temperature test is carried out, medium is that liquid nitrogen (- 196 DEG C) butterfly plate material is that 1Cr18Ni9Ti (not by low-temperature treatment) has found sealing surface
For buckling deformation amount up to 0.12mm or so, this is the main reason for causing interior leakage.Valve leakage out of steam system Producing reason：One is valve with
When pipeline uses flange connection, due to being shunk not between connection bedding and padding, connecting bolt and connector at low temperature material
It is synchronous to produce relaxation and be directed at leakage.
Although high pressure valve carried out pressure testing and leak test in a pre-installation, and integral pressure and tight is carried out before going into operation
Tightness test, but by transporting, installing, purging, the link such as drying and influenceed, can still cause valves leakage or leakage.Gas transmission
There is no pressure in yard and valve chamber operation preceding pipeline, can not effectively judge whether valve leaks outside and interior leakage in the case of no pressure.
If valve is control yard or valve chamber first order block valve, and leakage or interior leakage are serious, and this, which will give, goes into operation and later inspection
Maintenance brings strong influence.According to newly-built yard operation experience, if valve leak situation can be judged in advance, so as to valve
Door carries out maintenance processing.Changed if it can not handle before operation, so as to reduce later stage operation and production run cost.
In the prior art, whether detection valve has leakage, the detection of generally use normal pressure.There are the following problems for normal pressure detection：
(1) be difficult judge whether leak detection tube unimpeded, and blockage of once hunting leak, be difficult to discovery in time or can't find equipment at all be
It is no to have leakage；(2) if minute leakage occurs in equipment, because leak detection tube is very thin very long, the medium spilt easily crystallizes and flow velocity is slow, easily
Leak detection tube is blocked, even if not blocking up, the time that the medium that spills flows to leak detection bottle also can be very long, causes the minute leakage problem of equipment
It is difficult to it is found and handles in time；(3) to often result in leak detection liquid easy to change because of the problem of sealing for leak detection tube and leak detection bottle, needs frequent
Change, increase the workload of maintenance.
Current domestic ball valve quality is uneven, is summarized the experience by repeatedly going into operation, if finding that yard ball valve is being gone into operation
It is preceding to be handled without testing Lou to pinpoint the problems in time, then will be difficult to handle after operation, very expensive.Such as going into operation successfully
After need carry out main line ball valve replacing, extreme loss will be brought to Guan Shu enterprises.To find valve defect in advance, investigate out in time
Failsafe valve, by this ball valve leakage detector (more than DN250 valves are mostly double-piston valve), it can quickly judge valve event
Barrier, strong foundation is provided for maintenance of valve, is once gone into operation for grassroot project and is successfully provided safety guarantee.
Utility model content
The utility model supplies a kind of simple and compact for structure, operation to be provided the defects of overcoming above-mentioned prior art to exist
A kind of double-piston valve leakage detection apparatus convenient and swift, detection is accurate and visual, carrying is easy to carry, energy quicklook are judged
Failsafe valve, ensure that operating personnel quickly handles valve maintenance problem.
The technical scheme that the utility model solves above-mentioned technical problem is as follows：A kind of double-piston valve leakage detection apparatus, it is described
Double-piston valve leakage detection apparatus is connected to valve to be hunted leak, and the double-piston valve leakage detection apparatus includes nitrogen cylinder, pressure gauge, put
Empty valve, the air outlet valve of the nitrogen cylinder is connected with one end of the valve to be hunted leak by pressure piping, on the pressure piping
It is provided with the pressure gauge for monitoring the nitrogen pressure in the pressure piping and for being vented nitrogen in the pressure piping
Atmospheric valve.Nitrogen cylinder and valve to be hunted leak are connected by pressure piping, pressure gauge is set on pressure piping, passed through from nitrogen cylinder
Pressure piping is inflated to valve to be hunted leak, and after the blowing pressure reaches the examination criteria of the bearing capacity of valve to be detected, is passed through
The numerical value change of pressure gauge on observation pressure piping whether there is leakage to detect valve, in valve to be hunted leak closing, emptying
Valve is closed, and in the state of the air outlet valve closing of nitrogen cylinder, pressure gauge numerical value declines, it was demonstrated that and the housing of valve to be hunted leak has leakage,
Now analyze the leakage reason of valve to be hunted leak；Valve No leakage to be hunted leak is proved if pressure gauge numerical value keeps constant, is detected
After the completion of, atmospheric valve is opened, discharges the nitrogen in pressure piping.The present invention has simple and compact for structure, easy to operate, inspection
The advantages of accurate and visual, carrying is easy to carry is surveyed, facilitates operating personnel to detect the seal of valve at the construction field (site), avoids
There is leakage situation in valve during follow-up use, maintenance occurs and changes phenomenon that is difficult, delaying production, can reduce operating personnel
Labor intensity, improve operating efficiency and construction quality.
Further：The pressure piping includes Steel Tube Special and high-pressure hose, and the pressure gauge and the atmospheric valve are set
On the Steel Tube Special, one end of the Steel Tube Special connects the nitrogen cylinder by high-pressure hose, the Steel Tube Special
The other end by high-pressure hose connect described in valve to be hunted leak.Pressure piping, which is set, includes Steel Tube Special and high-pressure hose, high
Compressed steel pipe is alternatively arranged as leak detection tool support frame in addition to the effect as nitrogen pipeline, is easy to pressure gauge, the emptying set
The installations such as valve are fixed.And it is to increase leak detection tool suppleness to set high-pressure hose, it is easy to what is connected nitrogen cylinder and hunted leak
Valve.
Further：One end that the Steel Tube Special connects the nitrogen cylinder is provided with stop valve, the side of the stop valve
The Steel Tube Special is connected, the opposite side of the stop valve connects the high-pressure hose.In view of nitrogen bottleneck screw thread because
The frequency of usage tested of hunting leak is more, and gas leak phenomenon easily occurs at screw thread, to ensure result accuracy of hunting leak, in nitrogen cylinder and height
Stop valve is set between compressed steel pipe, ventilated by stop valve to regulate and control nitrogen cylinder into pressure piping, while pressure gauge can be passed through
To monitor the nitrogen amount of pipeline, the flow of nitrogen cylinder is controlled by block valve.
Further：The stop valve is cryogenic globe valve, using low-temp angular stop valve be often referred to operating temperature less than-
110 DEG C of valve, it is widely used in liquefied natural gas, compressed petroleum gas and other low temperature industries.It can be manufactured from 08 year applicable
Temperature reaches -196 DEG C of stop valve, and whole parts carry out Cold pretreatment using liquid nitrogen, it is entirely avoided are sealed during use
Deformation leakage.
Further：The side of the atmospheric valve is communicated on the Steel Tube Special, and the opposite side of the atmospheric valve passes through height
Pressure soft pipe connection has nitrogen recycling bottle.Because considering the frequency and workload of valve leak detection experiment, nitrogen recycling bottle is set back and forth
The nitrogen used in Acceptance Tests, the usage amount of nitrogen cylinder is reduced, while nitrogen recycling bottle is connected by high-pressure hose, be to increase
Add leak detection tool suppleness, be easy to connect nitrogen recycling bottle.
Further：It is soft that the opposite side of the atmospheric valve with the nitrogen recycling bottle connects the high pressure by flange respectively
Pipe.Flange connection is the important connected mode of pipeline construction, and flange connection is easy to use, can bear larger pressure, is applicable
Primary selection that whether valve leaks is judged by draught head in such.
Further：The both sides of the stop valve connect the Steel Tube Special by flange seal respectively and the high pressure is soft
Pipe.Flange connection is the important connected mode of pipeline construction, and flange connection is easy to use, can bear larger pressure, is applicable
Primary selection that whether valve leaks is judged by draught head in such.
Further：The air outlet valve of the nitrogen cylinder, the atmospheric valve and the valve to be hunted leak pass through flange seal respectively
Connect the pressure piping.Flange connection be pipeline construction important connected mode, flange connection it is easy to use, can bear compared with
Big pressure, primary selection that whether valve leaks is judged by draught head suitable for such.
Based on above-mentioned technical proposal, the beneficial effects of the utility model are：It the utility model is related to Natural gas pipeline system
The technical field of detection device in curing means, more particularly to a kind of double-piston valve leakage detection apparatus, double-piston valve leak detection dress
Put and be connected to valve to be hunted leak, double-piston valve leakage detection apparatus includes nitrogen cylinder, pressure gauge, atmospheric valve, the air outlet valve of nitrogen cylinder
Connected with one end of valve to be hunted leak by pressure piping, pressure gauge and atmospheric valve are provided with pressure piping.Pass through high-voltage tube
Road connects nitrogen cylinder and valve to be hunted leak, and pressure gauge is set on pressure piping, from nitrogen cylinder by pressure piping to waiting to hunt leak
Valve is inflated, after the blowing pressure reaches the examination criteria of the bearing capacity of valve to be detected, by observing on pressure piping
The numerical value change of pressure gauge whether there is leakage to detect valve, and valve to be hunted leak is closed, atmospheric valve is closed, nitrogen cylinder goes out
In the state of air valve is closed, pressure gauge numerical value declines, it was demonstrated that the housing of valve to be hunted leak has leakage, now analyzes valve to be hunted leak
Leakage reason；Valve No leakage to be hunted leak is proved if pressure gauge numerical value keeps constant, after the completion of detection, opens atmospheric valve,
Discharge the nitrogen in pressure piping.And stop valve is set between nitrogen cylinder and Steel Tube Special, nitrogen is regulated and controled by stop valve
Bottle is ventilated into pressure piping, while the nitrogen amount of pipeline can be monitored by pressure gauge, and nitrogen cylinder is controlled by block valve
Flow.The nitrogen for setting nitrogen recycling bottle to use back and forth in Acceptance Tests, reduce the usage amount of nitrogen cylinder.The utility model device can
Under the conditions of in process pipelines or device without pressure, simple, quick, analysis goes out work of the valve under practical operation situation
Performance, whole operation time are no more than 20 minutes.The present invention is accurate straight with simple and compact for structure, easy to operate, detection
See, carry the advantages of easy to carry, facilitate operating personnel to detect the seal of valve at the construction field (site), avoid and subsequently using
During valve there is leakage situation, there is maintenance and change phenomenon that is difficult, delaying production, it is strong that operating personnel's work can be reduced
Degree, improve operating efficiency and construction quality.
Brief description of the drawings
Fig. 1 is a kind of structural representation of double-piston valve leakage detection apparatus of the utility model；
In accompanying drawing, the list of parts representated by each label is as follows：
1st, double-piston valve leakage detection apparatus, 11, nitrogen cylinder, 12, pressure gauge, 13, atmospheric valve, 2, valve to be hunted leak, 3, high
Pressure pipeline, 31, Steel Tube Special, 32, high-pressure hose, 4, stop valve, 5, nitrogen recycling bottle.
Embodiment
Principle of the present utility model and feature are described below in conjunction with accompanying drawing, example is served only for explaining this practicality
It is new, it is not intended to limit the scope of the utility model.
As shown in figure 1, a kind of double-piston valve leakage detection apparatus, the double-piston valve leakage detection apparatus 1 is connected to wait to hunt leak
Valve 2, the double-piston valve leakage detection apparatus 1 include nitrogen cylinder 11, pressure gauge 12, atmospheric valve 13, and the nitrogen cylinder 11 goes out
Air valve is connected with one end of the valve 2 to be hunted leak by pressure piping 3, is provided with the pressure piping 3 for monitoring institute
State the pressure gauge 12 of the nitrogen pressure in pressure piping 3 and the atmospheric valve 13 for being vented nitrogen in the pressure piping 3.
Further：The pressure piping 3 includes Steel Tube Special 31 and high-pressure hose 32, the pressure gauge 12 and the emptying
Valve 13 is arranged on the Steel Tube Special 31, and one end of the Steel Tube Special 31 connects the nitrogen cylinder by high-pressure hose 32
11, the other end of the Steel Tube Special 31 connects the valve 2 to be hunted leak by high-pressure hose 32.
Further：One end that the Steel Tube Special 31 connects the nitrogen cylinder 11 is provided with stop valve 4, the stop valve 4
Side connect the Steel Tube Special 31, the opposite side of the stop valve 4 connects the high-pressure hose 32.
Further：The stop valve 4 is low-temp angular stop valve.
Further：The side of the atmospheric valve 13 is communicated on the Steel Tube Special 31, the opposite side of the atmospheric valve 13
Nitrogen recycling bottle 5 is communicated with by high-pressure hose 32.
Further：The opposite side of the atmospheric valve 13 connects the high pressure by flange respectively with the nitrogen recycling bottle 5
Flexible pipe 32.It can also be connected by pipe thread seal.
Further：The both sides of the stop valve 4 connect the Steel Tube Special 31 and the high pressure by flange seal respectively
Flexible pipe 32.It can also be connected by pipe thread seal.
Further：Air outlet valve, the atmospheric valve 13 and the valve to be hunted leak 2 of the nitrogen cylinder 11 pass through flange respectively
Sealing connects the pressure piping 3.It can also be connected by pipe thread seal.
The operating procedure of the present apparatus：When experiment starts, the first step, valve and double-piston valve leak detection dress to be hunted leak is connected
Put：Installation settings pressure gauge 12 and atmospheric valve 13 first on Steel Tube Special 31, secondly pass through method in the air outlet valve of nitrogen cylinder 11
One end of orchid connection high-pressure hose 32, the other end of high-pressure hose 32 connect the side of stop valve 4 by flange, stop valve 4
Opposite side connects one end of Steel Tube Special 31 by flange, is connected in the other end of Steel Tube Special 31 by high-pressure hose 32 to be checked
The sewage draining exit or drain of valve 2 are leaked, generally connects sewage draining exit.Second step, confirms the state of each valve, and nitrogen cylinder 11 goes out
Air valve is closed, and stop valve 4 is opened, and atmospheric valve 13 is closed, and valve 2 to be hunted leak is fully closed.3rd step, to the pressurising of valve 2 to be hunted leak, beat
The air outlet valve of nitrogen cylinder 11 is driven, the change of pressure gauge 12 is observed, treats that the pressure in pressure piping 3 rises to valve 2 to be hunted leak and designed
Leak detection pressure when, close nitrogen cylinder 11 air outlet valve, close stop valve 4.4th step, valve gas leakage situation judges, before judgement
Tackle each junction leak detection, it is ensured that instrument is in itself and valve junction does not leak outside, in order to avoid influence the accuracy of result.According to
GB/T 13927-2008《Industrial valve pressure test standard》, no pressure drop then illustrates that valve seal performance is good in two minutes.
Conversely, analysis valve leakage cause, carries out safeguarding or changing parts accordingly.5th step, extracting tool, stop valve 4 is opened,
Open atmospheric valve 13 and start pressure release by the nitrogen discharge in pipeline into nitrogen recycling bottle 5, after the numerical value back to zero of pressure gauge 12
High-pressure hose 32 is dismantled, Lou work is tested and finishes.
The technical field of detection device in Natural gas pipeline system curing means is the utility model is related to, more particularly to it is a kind of
Double-piston valve leakage detection apparatus, double-piston valve leakage detection apparatus are connected to valve to be hunted leak, and double-piston valve leakage detection apparatus includes
Nitrogen cylinder, pressure gauge, atmospheric valve, the air outlet valve of nitrogen cylinder are connected with one end of valve to be hunted leak by pressure piping, high-voltage tube
Pressure gauge and atmospheric valve are provided with road.Nitrogen cylinder and valve to be hunted leak are connected by pressure piping, set on pressure piping
Pressure gauge, inflated from nitrogen cylinder by pressure piping to valve to be hunted leak, when the blowing pressure reaches the pressure-bearing energy of valve to be detected
After the examination criteria of power, it whether there is leakage by observing the numerical value change of the pressure gauge on pressure piping to detect valve,
Valve to be hunted leak is closed, atmospheric valve is closed, and in the state of the air outlet valve closing of nitrogen cylinder, pressure gauge numerical value declines, it was demonstrated that to be checked
The housing of leakage valve has leakage, now analyzes the leakage reason of valve to be hunted leak；Prove to treat if pressure gauge numerical value keeps constant
Leak detection valve No leakage, after the completion of detection, atmospheric valve is opened, discharges the nitrogen in pressure piping.And in nitrogen cylinder and high pressure steel
Stop valve is set between pipe, ventilated by stop valve to regulate and control nitrogen cylinder into pressure piping, while can be supervised by pressure gauge
The nitrogen amount in keyholed back plate road, the flow of nitrogen cylinder is controlled by block valve.The nitrogen for setting nitrogen recycling bottle to use back and forth in Acceptance Tests
Gas, reduce the usage amount of nitrogen cylinder.The utility model device can be simple, fast under the conditions of process pipelines or device are without pressure
Prompt, analysis goes out work performance of the valve under practical operation situation, and the whole operation time is no more than 20 minutes.Present invention tool
There is the advantages of simple and compact for structure, easy to operate, detection is accurate and visual, carrying is easy to carry, facilitate operating personnel applying
The seal of work Site Detection valve, avoid the valve during follow-up use and leakage situation occur, it is tired maintenance replacing occur
Phenomenon that is difficult, delaying production, can reduce labor intensity of operating staff, improve operating efficiency and construction quality.
Preferred embodiment of the present utility model is the foregoing is only, it is all in this practicality not to limit the utility model
Within new spirit and principle, any modification, equivalent substitution and improvements made etc., guarantor of the present utility model should be included in
Within the scope of shield.
Claims (8)
1. a kind of double-piston valve leakage detection apparatus, the double-piston valve leakage detection apparatus (1) is connected to valve to be hunted leak (2), its
It is characterised by：The double-piston valve leakage detection apparatus (1) includes nitrogen cylinder (11), pressure gauge (12), atmospheric valve (13), the nitrogen
The air outlet valve of gas cylinder (11) is connected with one end of the valve (2) to be hunted leak by pressure piping (3), the pressure piping (3)
On be provided with pressure gauge (12) for monitoring nitrogen pressure in the pressure piping (3) and for being vented the pressure piping
(3) atmospheric valve (13) of interior nitrogen.
A kind of 2. double-piston valve leakage detection apparatus according to claim 1, it is characterised in that：Pressure piping (3) bag
Steel Tube Special (31) and high-pressure hose (32) are included, the pressure gauge (12) and the atmospheric valve (13) are arranged on the Steel Tube Special
(31) on, one end of the Steel Tube Special (31) connects the nitrogen cylinder (11), the Steel Tube Special by high-pressure hose (32)
(31) the other end passes through valve (2) to be hunted leak described in high-pressure hose (32) connection.
A kind of 3. double-piston valve leakage detection apparatus according to claim 2, it is characterised in that：The Steel Tube Special (31) is even
The one end for leading to the nitrogen cylinder (11) is provided with stop valve (4), and the side of the stop valve (4) connects the Steel Tube Special
(31), the opposite side of the stop valve (4) connects the high-pressure hose (32).
A kind of 4. double-piston valve leakage detection apparatus according to claim 3, it is characterised in that：The stop valve (4) is low
Warm angle stop valves.
A kind of 5. double-piston valve leakage detection apparatus according to claim 2, it is characterised in that：The one of the atmospheric valve (13)
Side is communicated on the Steel Tube Special (31), and the opposite side of the atmospheric valve (13) is communicated with nitrogen by high-pressure hose (32) and returned
Receive bottle (5).
A kind of 6. double-piston valve leakage detection apparatus according to claim 5, it is characterised in that：The atmospheric valve (13) it is another
Side connects the high-pressure hose (32) by flange respectively with the nitrogen recycling bottle (5).
A kind of 7. double-piston valve leakage detection apparatus according to claim 3 or 4, it is characterised in that：The stop valve (4)
Both sides connect the Steel Tube Special (31) and the high-pressure hose (32) by flange seal respectively.
A kind of 8. double-piston valve leakage detection apparatus according to claim 1-6 any one, it is characterised in that：The nitrogen
Air outlet valve, the atmospheric valve (13) of bottle (11) connect the high pressure by flange seal respectively with the valve (2) to be hunted leak
Pipeline (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721078452.7U CN207074106U (en) | 2017-08-24 | 2017-08-24 | A kind of double-piston valve leakage detection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721078452.7U CN207074106U (en) | 2017-08-24 | 2017-08-24 | A kind of double-piston valve leakage detection apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN207074106U true CN207074106U (en) | 2018-03-06 |
Family
ID=61521104
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721078452.7U Active CN207074106U (en) | 2017-08-24 | 2017-08-24 | A kind of double-piston valve leakage detection apparatus |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108956057A (en) * | 2018-09-20 | 2018-12-07 | 中国石油化工股份有限公司 | DBB valve leak detecting device |
| CN109737316A (en) * | 2019-03-18 | 2019-05-10 | 新疆大全新能源股份有限公司 | A kind of Isolated Shield device and method of valves leakage |
| CN114278860A (en) * | 2022-01-18 | 2022-04-05 | 天津市长龙宏业燃气设备有限公司 | Control method and filling system for filling leakage-proof liquefied gas cylinder |
-
2017
- 2017-08-24 CN CN201721078452.7U patent/CN207074106U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108956057A (en) * | 2018-09-20 | 2018-12-07 | 中国石油化工股份有限公司 | DBB valve leak detecting device |
| CN109737316A (en) * | 2019-03-18 | 2019-05-10 | 新疆大全新能源股份有限公司 | A kind of Isolated Shield device and method of valves leakage |
| CN114278860A (en) * | 2022-01-18 | 2022-04-05 | 天津市长龙宏业燃气设备有限公司 | Control method and filling system for filling leakage-proof liquefied gas cylinder |
| CN114278860B (en) * | 2022-01-18 | 2023-10-13 | 天津市长龙宏业燃气设备有限公司 | Control method capable of preventing leakage of liquefied gas cylinder and filling system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200914 Address after: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Co-patentee after: SINOPEC CHUANQI DONGSONG NATURAL GAS PIPELINE Co.,Ltd. Patentee after: China Petroleum & Chemical Corp. Address before: 430223 Hubei Wuhan City, Wuhan City, East Lake New Technology Development Zone Optics Valley Avenue No. 126 Sichuan Gas East pipeline project, the 1-5 layer of the Wuhan control center Patentee before: SINOPEC CHUANQI DONGSONG NATURAL GAS PIPELINE Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee after: CHINA PETROLEUM & CHEMICAL Corp. Patentee after: Sichuan East Natural Gas Pipeline Co.,Ltd. Address before: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee before: CHINA PETROLEUM & CHEMICAL Corp. Patentee before: SINOPEC CHUANQI DONGSONG NATURAL GAS PIPELINE Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211103 Address after: Room 08-10, 6 / F, block a, No. 5, Dongtucheng Road, Chaoyang District, Beijing 100013 Patentee after: National Petroleum and natural gas pipeline network Group Co.,Ltd. Patentee after: Sichuan East Natural Gas Pipeline Co.,Ltd. Address before: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee before: CHINA PETROLEUM & CHEMICAL Corp. Patentee before: Sichuan East Natural Gas Pipeline Co.,Ltd. |
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| TR01 | Transfer of patent right |