CN110017378A - Safe pressure relief device and method and purposes suitable for high pressure operating condition - Google Patents
Safe pressure relief device and method and purposes suitable for high pressure operating condition Download PDFInfo
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- CN110017378A CN110017378A CN201810019744.6A CN201810019744A CN110017378A CN 110017378 A CN110017378 A CN 110017378A CN 201810019744 A CN201810019744 A CN 201810019744A CN 110017378 A CN110017378 A CN 110017378A
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- operating condition
- piston
- pressure
- high pressure
- relief device
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Classifications
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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
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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
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
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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
- F16K37/0025—Electrical or magnetic means
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The present invention relates to a kind of safe pressure relief device suitable for high pressure operating condition and method and purposes, mainly solve the problems, such as that safe pressure relief device precision under high pressure operating condition is not high in the prior art, misses quick-fried Frequent Accidents.The present invention is by using a kind of safe pressure relief device suitable for high pressure operating condition, it including gas entrance (1) of releasing, valve body (2), valve chamber (3), piston (4), explosion needle (6), lets out bleeder holes (7), valve body (2) two sides are respectively to release gas entrance (1) and to let out bleeder holes (7)；Have valve chamber (3) in valve body (2), is equipped with piston (4) in valve chamber (3)；Piston (4) is equipped with explosion needle (6), and explosion needle (6) is that the technical solution of pressure release trigger element preferably solves the above problem, can be used in safety relief.
Description
Technical field
The present invention relates to a kind of safe pressure relief device suitable for high pressure operating condition and methods and purposes.
Background technique
Safe pressure relief device is that petrochemical industry, the pressure vessel of chemical plant installations, pipeline or other closed systems prevent superpressure
Important safety.It can be opened under defined temperature and pressure, pressure of releasing, and ensure people's life and national wealth
Safety.Safe pressure relief device does not depend on any extra power usually and acts, so protecting together frequently as the last of bearing device
Protection unit.The wider pressure relief device non-reclosed of domestic application is blasting piece device at present, and rupture disk safe pressure relief device has
The advantages that structure is simple, relieving capacity is strong, but there is also following problems: and (1) explosion precision is low.(2) it is easy to happen fracture by fatigue.
Rupture disk internal stress is higher than the yield limit of material when rupture, and under the action of pulse or pressure, it is broken that fatigue easily occurs for rupture disk
It splits.(3) rupture disk and material directly contact influence vulnerable to medium temperature, corrosivity etc., need to regularly replace.It (4) can not online more
It changes.Replacement rupture disk needs to dismantle pipeline, and the time is long, and risk is high, and inactivity cost is high.Rupture disk is as a kind of important safety
Attachment has extensive purposes in petrochemical industry.In some occasions for needing quickly to release such as CNG long-tube trailer etc., it is all made of
Rupture disk is as safety device.Rupture disk can generate fatigue after long-term use, and Initiation Pressure is caused to change, to go out
Quick-fried phenomenon is now missed, it is practical that a lot of such accidents had occurred in the middle.Carry out the CNG air entraining substation such as Qingdao, Jinan, Zhenjiang this year
Rupture disc decompression apparatus occurs in succession and misses quick-fried accident.
For pressure relief device non-reclosed, other than blasting piece device, ASME boiler and pressure vessel specification and its specification
Case also recommended explosion needle-like relief valve.Relative to rupture disk, explosion needle-like relief valve is high with precision, fatigue effect is small,
Not with material directly contact, can replace online the advantages that.For high pressure operating condition, the power that explosion needle is subject to is larger, required diameter compared with
Slightly, to meet elongate rod condition, the length of explosion needle can be very long, causes pressure relief device hardly consistent with site requirement.Therefore it develops
Safe pressure relief device suitable for high pressure operating condition has great importance.
" hydraulic horizontal-pushing air entraining substation restrains the detonation experiment test extremely of vehicle rupture disk " (" safe and healthy and environment ",
2015,15 (2): 34-37) it detonates extremely for Qingdao and 2, Jinan hydraulic horizontal-pushing substation tube bank vehicle rupture disk, and cause hydraulic
The accident of oily splash carries out accident reconstruction simulated experiment test.Respectively in 2 kinds of conditions of oil return line Abnormal Blocking and normal oil return
Under, the pressure oscillation situation using dynamic high speed data acquisition equipment, during test oil return at rupture disk.It is sent out by experiment
Now, when normal oil return, pressure can decline rapidly at rupture disk, and it is dynamic not will form ascending wave, and oil return line blocks moment meeting
Cause occur pressure oscillation at rupture disk, but ascensional range is no more than 1MPa, and the duration is shorter, is not enough to cause rupture disk
Detonation.The results showed that the reason of causing rupture disk to detonate extremely may be related with rupture disk fatigue or Rig up error, rather than
Pipeline blockage causes superpressure to cause.
Summary of the invention
The first technical problem to be solved by the present invention is safe pressure relief device precision under high pressure operating condition in the prior art
It is not high, accidentally quick-fried Frequent Accidents the problem of, a kind of new safe pressure relief device suitable for high pressure operating condition is provided, have precision height,
The preferable advantage of safety.The second technical problem to be solved by the present invention is to provide one kind and phase one of the technical issues of solution
The method of the corresponding safety relief suitable for high pressure operating condition.The third technical problem to be solved by the present invention be to provide it is a kind of with
One of the technical issues of solution the corresponding safe pressure relief device suitable for high pressure operating condition purposes.
One of in order to solve the above problem, The technical solution adopted by the invention is as follows: a kind of safety suitable for high pressure operating condition
Pressure relief device, including gas entrance (1) of releasing, valve body (2), valve chamber (3), piston (4), explosion needle (6), let out bleeder holes (7), valve
Body (2) two sides are respectively to release gas entrance (1) and to let out bleeder holes (7)；Have valve chamber (3) in valve body (2), is equipped in valve chamber (3)
Piston (4)；Piston (4) is equipped with explosion needle (6), and explosion needle (6) is pressure release trigger element；Piston (4) diameter, which is less than, to be let out
Deflation entrance (1) diameter.
In above-mentioned technical proposal, it is preferable that explosion needle (6) includes active section and fixed section, and centre is active section, and both ends are
Fixed section.
In above-mentioned technical proposal, it is preferable that the diameter of the active section of explosion needle (6) is less than the diameter of fixed section, explosion needle
(6) material is 316L stainless steel.
In above-mentioned technical proposal, it is preferable that the active section of explosion needle (6) and the total length of fixed section are fixed, work
The length of section is 200~1000mm, and the length of active section is different, then Instability load is different, by replacing different operating section
The explosion needle of length realizes the adjustment to safe pressure relief device setup pressure value, the correspondence between length of work segment and pressure value
Relationship is square being inversely proportional for pressure value and length of work segment.
In above-mentioned technical proposal, it is preferable that piston (4) is equipped with sensor (5).
In above-mentioned technical proposal, it is preferable that when explosion needle (6) are bent, and piston (4) acts, pressure release action signal is issued,
Sensor (5) is by the signal teletransmission to control room and issues alarm signal, controls indoor operator and finds and carry out in time
Processing.
In above-mentioned technical proposal, it is preferable that piston (4) diameter and gas entrance (1) diameter ratio of releasing is 0.8-0.2:1.
In above-mentioned technical proposal, it is preferable that high pressure operating condition is the operating condition that finger pressure is 10MPa-50MPa.
In order to solve the above problem two, The technical solution adopted by the invention is as follows: a kind of safety suitable for high pressure operating condition
The method of pressure release, when gas entrance (1) pressure of releasing is less than the safety relief pressure value of setting, stress is less than on explosion needle (6)
Its Instability load, explosion needle are in stable state, and supporting piston (4) is in close state valve, and gas can not be from
Let out bleeder holes (7) outflow；When gas entrance (1) pressure of releasing increases to the safety relief pressure value of setting, on explosion needle by
When power reaches its critical compression bar collapsing load, the right unstability bending of explosion spicula, in atmospheric pressure effect lower piston (4) Xiang Shangyi that releases
Dynamic, valve opening, gas is flowed out from bleeder holes (7) are let out, and realizes safety relief.
In order to solve the above problem three, The technical solution adopted by the invention is as follows: a kind of safety suitable for high pressure operating condition
The purposes of pressure relief device, in safety relief equipment in natural gas, petrochemical industry.
A kind of safe pressure relief device suitable for high pressure operating condition provided by the invention compared with prior art, can will act at
Power on piston reduces, that is, the power acted on explosion needle reduces, to reduce the diameter of explosion needle, effectively improves explosion needle-like
The precision of valve, makes that it is suitable for high pressure operating conditions.Piston is equipped with sensor, when explosion needle bending, piston action, issues pressure release
Action signal, and by the signal teletransmission to control room and alarm signal is issued, controlling indoor operator can find in time simultaneously
It is handled, achieves preferable technical effect.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of safe pressure relief device suitable for high pressure operating condition of the invention in the closure state.
Fig. 2 is schematic diagram when pressure relief device is in pressure release state.
In Fig. 1-2,1. release gas entrance, 2. valve bodies, 3. valve chambers, 4. pistons, 5. sensors, 6. explosion needles, and 7. release gas
Outlet.
The present invention will be further described below by way of examples, but is not limited only to the present embodiment.
Specific embodiment
[embodiment 1]
A kind of safe pressure relief device suitable for high pressure operating condition, high pressure operating condition are the works that finger pressure is 10MPa~50MPa
Condition.As shown in Figs. 1-2, comprising: release gas entrance (1), valve body (2), valve chamber (3), piston (4), explosion needle (6), gas of releasing goes out
Mouth (7).Valve body (2) two sides are respectively to release gas entrance (1) and to let out bleeder holes (7)；There are valve chamber (3), valve chamber in valve body (2)
(3) piston (4) are equipped in；Piston (4) is equipped with explosion needle (6), and explosion needle (6) is pressure release trigger element.When gas entrance of releasing
(1) when pressure is less than the safety relief pressure value of setting, stress is less than its Instability load on explosion needle (6), at explosion needle
In stable state, supporting piston (4) is in close state valve, and gas can not be flowed out from bleeder holes (7) are let out；When releasing
When gas entrance (1) pressure increases to the safety relief pressure value of setting, stress reaches its critical compression bar collapsing load on explosion needle
When, the right unstability bending of explosion spicula, releasing, atmospheric pressure effect lower piston (4) is moved up, valve opening, and gas is from gas of releasing
Export the purpose that safety relief is realized in (7) outflow.
Piston (4) diameter and gas entrance (1) diameter ratio of releasing are 0.7:1, and piston (4) diameter is less than gas entrance of releasing
(1) diameter reduces the power acted on explosion needle (6), can select the explosion needle of small diameter, and explosion needle (6) material is
316L stainless steel improves the precision of pressure relief device so that explosion needle be made to meet the requirement of elongate rod, makes that it is suitable for high pressure works
Condition.
Piston (4) is equipped with sensor (5), when explosion needle (6) bending, piston action, issues pressure release action signal, and
By the signal teletransmission to control room and alarm signal is issued, controlling indoor operator can find and handle in time.
Explosion needle (6) includes active section and fixed section, and centre is active section, and both ends are fixed section.The work of explosion needle (6)
The diameter of section and fixed section is fixed, and the diameter of active section is less than the diameter of fixed section.The active section of explosion needle (6) and
The total length of fixed section be it is fixed, the length of active section is 800mm, and it is different as the length of 50MPa but active section set pressure,
Then Instability load is different, by replacing the explosion needle of different operating segment length, realizes and sets pressure to safe pressure relief device
The adjustment of value, corresponding relationship between length of work segment and pressure value are square being inversely proportional for pressure value and length of work segment.
[embodiment 2]
A kind of safe pressure relief device suitable for high pressure operating condition, high pressure operating condition are the works that finger pressure is 10MPa~50MPa
Condition.As shown in Figs. 1-2, comprising: release gas entrance (1), valve body (2), valve chamber (3), piston (4), explosion needle (6), gas of releasing goes out
Mouth (7).Valve body (2) two sides are respectively to release gas entrance (1) and to let out bleeder holes (7)；There are valve chamber (3), valve chamber in valve body (2)
(3) piston (4) are equipped in；Piston (4) is equipped with explosion needle (6), and explosion needle (6) is pressure release trigger element.When gas entrance of releasing
(1) when pressure is less than the safety relief pressure value of setting, stress is less than its Instability load on explosion needle (6), at explosion needle
In stable state, supporting piston (4) is in close state valve, and gas can not be flowed out from bleeder holes (7) are let out；When releasing
When gas entrance (1) pressure increases to the safety relief pressure value of setting, stress reaches its critical compression bar collapsing load on explosion needle
When, the right unstability bending of explosion spicula, releasing, atmospheric pressure effect lower piston (4) is moved up, valve opening, and gas is from gas of releasing
Export the purpose that safety relief is realized in (7) outflow.
Piston (4) diameter and gas entrance (1) diameter ratio of releasing are 0.5:1, and piston (4) diameter is less than gas entrance of releasing
(1) diameter reduces the power acted on explosion needle (6), can select the explosion needle of small diameter, and explosion needle (6) material is
Material is that 316L stainless steel so that explosion needle be made to meet the requirement of elongate rod improves the precision of pressure relief device, makes that it is suitable for height
Press operating condition.
Piston (4) is equipped with sensor (5), when explosion needle (6) bending, piston action, issues pressure release action signal, and
By the signal teletransmission to control room and alarm signal is issued, controlling indoor operator can find and handle in time.
Explosion needle (6) includes active section and fixed section, and centre is active section, and both ends are fixed section.The work of explosion needle (6)
The diameter of section and fixed section is fixed, and the diameter of active section is less than the diameter of fixed section.The active section of explosion needle (6) and
The total length of fixed section be it is fixed, the length of active section is 400mm, setup pressure value be 30MPa but the length of active section not
Together, then Instability load is different, by replacing the explosion needle of different operating segment length, realizes to set safe pressure relief device and press
The adjustment of force value, corresponding relationship between length of work segment and pressure value are square being inversely proportional for pressure value and length of work segment.
[embodiment 3]
A kind of safe pressure relief device suitable for high pressure operating condition, high pressure operating condition are the works that finger pressure is 10MPa~50MPa
Condition.As shown in Figs. 1-2, comprising: release gas entrance (1), valve body (2), valve chamber (3), piston (4), explosion needle (6), gas of releasing goes out
Mouth (7).Valve body (2) two sides are respectively to release gas entrance (1) and to let out bleeder holes (7)；There are valve chamber (3), valve chamber in valve body (2)
(3) piston (4) are equipped in；Piston (4) is equipped with explosion needle (6), and explosion needle (6) is pressure release trigger element.When gas entrance of releasing
(1) when pressure is less than the safety relief pressure value of setting, stress is less than its Instability load on explosion needle (6), at explosion needle
In stable state, supporting piston (4) is in close state valve, and gas can not be flowed out from bleeder holes (7) are let out；When releasing
When gas entrance (1) pressure increases to the safety relief pressure value of setting, stress reaches its critical compression bar collapsing load on explosion needle
When, the right unstability bending of explosion spicula, releasing, atmospheric pressure effect lower piston (4) is moved up, valve opening, and gas is from gas of releasing
Export the purpose that safety relief is realized in (7) outflow.
Piston (4) diameter and gas entrance (1) diameter ratio of releasing are 0.3:1, and piston (4) diameter is less than gas entrance of releasing
(1) diameter reduces the power acted on explosion needle (6), can select the explosion needle of small diameter, and explosion needle (6) material is
316L stainless steel improves the precision of pressure relief device so that explosion needle be made to meet the requirement of elongate rod, makes that it is suitable for high pressure works
Condition.
Piston (4) is equipped with sensor (5), when explosion needle (6) bending, piston action, issues pressure release action signal, and
By the signal teletransmission to control room and alarm signal is issued, controlling indoor operator can find and handle in time.
Explosion needle (6) includes active section and fixed section, and centre is active section, and both ends are fixed section.The work of explosion needle (6)
The diameter of section and fixed section is fixed, and the diameter of active section is less than the diameter of fixed section.The active section of explosion needle (6) and
The total length of fixed section be it is fixed, the length of active section is 300mm, and the length for setting pressure 20MPa but active section is different, then
Instability load is different, by replacing the explosion needle of different operating segment length, realizes to safe pressure relief device setup pressure value
Adjustment, corresponding relationship between length of work segment and pressure value is square being inversely proportional for pressure value and length of work segment.
[comparative example]
CN201520339572.2 provides a kind of fast changeable explosion needle-valve, and piston is identical as entrance caliber, right
In high pressure operating condition, the power for acting on piston (power i.e. on explosion needle) is larger, and explosion needle needs thicker diameter at this time, and quick-fried
Broken needle must be that elongate rod is just able to satisfy Euler column spring unstability law, so longer explosion needle length is needed, so that pressure release fills
It sets bulky, it is difficult to install.
A kind of safe pressure relief device suitable for high pressure operating condition provided by the invention compared with prior art, can will act at
Power on piston reduces, that is, the power acted on explosion needle reduces, to reduce the diameter of explosion needle, effectively improves explosion needle-like
The precision of valve, makes that it is suitable for high pressure operating conditions.Piston is equipped with sensor, when explosion needle bending, piston action, issues pressure release
Action signal, and by the signal teletransmission to control room and alarm signal is issued, controlling indoor operator can find in time simultaneously
It is handled, achieves preferable technical effect.
Claims (10)
1. a kind of safe pressure relief device suitable for high pressure operating condition, including gas entrance (1) of releasing, valve body (2), valve chamber (3), piston
(4), explosion needle (6), let out bleeder holes (7), valve body (2) two sides are respectively to release gas entrance (1) and to let out bleeder holes (7)；Valve
Have valve chamber (3) in body (2), is equipped with piston (4) in valve chamber (3)；Piston (4) is equipped with explosion needle (6), and explosion needle (6) is pressure release
Trigger element；Piston (4) diameter is less than gas entrance (1) diameter of releasing.
2. being suitable for the safe pressure relief device of high pressure operating condition according to claim 1, it is characterised in that explosion needle (6) includes work
Make section and fixed section, centre is active section, and both ends are fixed section.
3. being suitable for the safe pressure relief device of high pressure operating condition according to claim 2, it is characterised in that the work of explosion needle (6)
The diameter of section is less than the diameter of fixed section, and explosion needle (6) material is 316L stainless steel.
4. being suitable for the safe pressure relief device of high pressure operating condition according to claim 2, it is characterised in that the work of explosion needle (6)
The total length of section and fixed section be it is fixed, the length of active section is 200~1000mm, and the length of active section is different, then critical
Collapsing load is different, by replacing the explosion needle of different operating segment length, realizes the tune to safe pressure relief device setup pressure value
Whole, corresponding relationship between length of work segment and pressure value is square being inversely proportional for pressure value and length of work segment.
5. being suitable for the safe pressure relief device of high pressure operating condition according to claim 1, it is characterised in that piston (4), which is equipped with, to be passed
Sensor (5).
6. being suitable for the safe pressure relief device of high pressure operating condition according to claim 5, it is characterised in that when explosion needle (6) is curved
Song when piston (4) acts, issues pressure release action signal, which to control room and is issued alarm signal by sensor (5)
Number, it controls indoor operator and finds and handle in time.
7. according to claim 1 be suitable for high pressure operating condition safe pressure relief device, it is characterised in that piston (4) diameter with let out
Deflation entrance (1) diameter ratio is 0.8-0.2:1.
8. being suitable for the safe pressure relief device of high pressure operating condition according to claim 1, it is characterised in that high pressure operating condition is finger pressure
Power is the operating condition of 10MPa-50MPa.
9. a kind of method of the safety relief suitable for high pressure operating condition, using device described in claim 1-8, when releasing, gas enters
When mouth (1) pressure is less than the safety relief pressure value of setting, stress is less than its Instability load, explosion needle on explosion needle (6)
In stable state, supporting piston (4) is in close state valve, and gas can not be flowed out from bleeder holes (7) are let out；When letting out
When deflation entrance (1) pressure increases to the safety relief pressure value of setting, stress reaches its critical strut buckling and carries on explosion needle
When lotus, the right unstability bending of explosion spicula, releasing, atmospheric pressure effect lower piston (4) is moved up, valve opening, and gas is from releasing
Gas exports (7) outflow, realizes safety relief.
10. the purposes described in a kind of claim 1-9 suitable for the safe pressure relief device of high pressure operating condition is used for natural gas, petroleum
In chemical industry in safety relief equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810019744.6A CN110017378A (en) | 2018-01-09 | 2018-01-09 | Safe pressure relief device and method and purposes suitable for high pressure operating condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810019744.6A CN110017378A (en) | 2018-01-09 | 2018-01-09 | Safe pressure relief device and method and purposes suitable for high pressure operating condition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110017378A true CN110017378A (en) | 2019-07-16 |
Family
ID=67187800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810019744.6A Pending CN110017378A (en) | 2018-01-09 | 2018-01-09 | Safe pressure relief device and method and purposes suitable for high pressure operating condition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110017378A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202812338U (en) * | 2012-02-20 | 2013-03-20 | 刘海亮 | Pressure bar instability trigger type decompression valve |
| CN103470215A (en) * | 2012-06-08 | 2013-12-25 | 刘海亮 | Compression bar buckling triggering type wellhead safety valve |
| CN205278473U (en) * | 2015-12-27 | 2016-06-01 | 徐州八方安全设备有限公司 | Differential blasting needle valve |
-
2018
- 2018-01-09 CN CN201810019744.6A patent/CN110017378A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202812338U (en) * | 2012-02-20 | 2013-03-20 | 刘海亮 | Pressure bar instability trigger type decompression valve |
| CN103470215A (en) * | 2012-06-08 | 2013-12-25 | 刘海亮 | Compression bar buckling triggering type wellhead safety valve |
| CN205278473U (en) * | 2015-12-27 | 2016-06-01 | 徐州八方安全设备有限公司 | Differential blasting needle valve |
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Application publication date: 20190716 |
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