CN105909835A - Unpowered safety valve for pipeline emergency flow limiting - Google Patents
Unpowered safety valve for pipeline emergency flow limiting Download PDFInfo
- Publication number
- CN105909835A CN105909835A CN201610425320.0A CN201610425320A CN105909835A CN 105909835 A CN105909835 A CN 105909835A CN 201610425320 A CN201610425320 A CN 201610425320A CN 105909835 A CN105909835 A CN 105909835A
- Authority
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- China
- Prior art keywords
- passage
- valve body
- valve
- active pin
- sealing plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007789 sealing Methods 0.000 claims abstract description 27
- 238000004891 communication Methods 0.000 claims abstract description 16
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052744 lithium Inorganic materials 0.000 claims description 3
- 238000005381 potential energy Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 11
- 238000003860 storage Methods 0.000 description 7
- 230000002265 prevention Effects 0.000 description 5
- 239000010779 crude oil Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0644—One-way valve
- F16K31/0655—Lift valves
-
- 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
Abstract
The invention discloses an unpowered safety valve for pipeline emergency flow limiting. The safety valve comprises a valve body, and a valve cover which is connected with the valve body, wherein a magnetic field controller is arranged on the top part of the valve cover; channels are arranged in two sides of the valve body; sealing plates are arranged at the inner sides of the two channels; the inner sides of the two sealing plates are correspondingly connected with connecting arms through movable pins on cranks; a valve element is mounted on each connecting arm; a flange is arranged at the outer side of each channel; magnetic chucks which are connected to the magnetic field controller through communication cables and two balancing weights are arranged at the rear side of the valve body; the two balancing weights are connected with outer extending parts of the two movable pins through two torsional arms which are correspondingly fixedly connected with the two balancing weights. The safety valve has the advantages that the gravitational potential energy of the balancing weights is treated as the emergency power, so that a traditional driving device is avoided; the flow state can be quickly and automatically changed in emergency, thus the automatic emergency safety control for ensuring the flow safety of a pipeline can be achieved, and meanwhile, the possible potential risks such as fire and pollution accident caused by the flow leakage can be removed.
Description
Technical field
The present invention relates to a kind of relief valve, more particularly, it relates to a kind of for combustion gas, water conservancy,
The harmful influence such as petrochemical industry produce storage tank and tube pass and for urgent danger prevention and have pipe safety locking action
Automatization's relief valve.
Background technology
At present, the harmful influence such as CNPC, Sinopec produce, accumulating industry pipeline valve technology
Relatively original tradition, the type of drive overwhelming majority is dependent on manpower, hydraulic system, gas storage pneumatic system, electricity
Move and combination transmission mode.But numerous production practices and accident case prove, the manipulation of existing tube pass valve
There is obvious hidden danger.
Such as, CNPC 7.16 accident in 2010, Dalian Bonded Area oil depot crude oil pipeline is on fire from explosion, by
After electric gate valve power-off cannot closing flow path, cause crude oil leak formation trickling fire, not only ignited one
The oil tank of ten ten thousand steres, but also cause the pollution of Dalian Sea Area and burn.
Further, 2013 Qingdao Huang Island 11.22 Sinopec Technique of Crude Oil Transport Pipeline Leak explosion accidents, casualty loss
Heavy, affect huge.
Further, the fire of 4.22 Jingjiang New Port town, Jiangsu moral bridge storage company limiteies in 2016 generation, by
Trickling fire, and sustained combustion 16 hours can not be formed by closing flow path in valve, suffer heavy losses, affect pole
Bad, cause a people to sacrifice.
Summing up the tube pass valve of prior art, no matter its type of drive how, all has the disadvantage in that
(1) mechanically operated supporting requirement is high, fault rate is high, maintenance cost is high, the cost of supporting guarantee
High, high to interdependencies such as civil powers.
(2) self hidden danger brings new safety problem, the particularly danger such as field and fire to flow management and control
Region, the reliability of automation function is difficult to ensure.
(3) in emergency circumstances lack the effective means of automatic emergency, very under the conditions of can not independently meet an urgent need, with
Quickly upgrade to when having an accident.
Summary of the invention
The purpose of the present invention solves above-mentioned problem of the prior art exactly, and provide one to overcome for this existing
The defect having technology the unpowered pipeline promoting harmful influence storage tank essential safety are met an urgent need current limliting relief valve.
A kind of technical scheme of the present invention is:
A kind of unpowered pipeline is met an urgent need current limliting relief valve, including valve body and be bolted described valve body
Valve gap, the top of described valve gap is provided with field controller, the both sides of described valve body be respectively provided with left passage and
Right passage；The inner side of described left passage is provided with left sealing plate, described left sealing plate inner side by being arranged on
Left active pin on left crank connects left linking arm, and described left linking arm is installed left spool, described left passage
Outside be left flange；The inner side of described right passage is provided with right sealing plate, described right sealing plate inner side lead to
Cross the right active pin being arranged on right crank and connect right linking arm, described right linking arm is installed right spool, institute
The outside stating right passage is right flange；The rear side of described valve body is provided with communication cable and connects described magnetic field
The magnetic-disc of controller and two balancing weights, two described balancing weights are by two torsions connect with its circle respectively
The arm of force connects left active pin and the sponson of right active pin.
The another kind of technical scheme of the present invention is:
A kind of unpowered pipeline is met an urgent need current limliting relief valve, including valve body and be bolted described valve body
Valve gap, the top of described valve gap is provided with field controller, the both sides of described valve body have left passage and
Right passage；Be provided with left sealing plate in the inner side of described left passage, described left sealing plate inner side by arrange
Left active pin on left crank connects left linking arm, and described left linking arm is installed left spool, and a described left side leads to
The outside in road is left flange, and the outside of described right passage is right flange；The rear side of described valve body is provided with magnetic
Dish and balancing weight, described magnetic-disc by communication cable connect described in field controller, described counterweight
Block is connected the sponson of left active pin by the toggle affixed with it.
The yet another technique scheme of the present invention is:
A kind of unpowered pipeline is met an urgent need current limliting relief valve, including valve body and be bolted described valve body
Valve gap, the top of described valve gap is provided with field controller, the both sides of described valve body have left passage and
Right passage；The inner side of described right passage is provided with right sealing plate, described right sealing plate inner side by being arranged on
Right active pin on right crank connects right linking arm, and described right linking arm is installed right spool, described right passage
Outside be right flange, the outside of described left passage is left flange；The rear side of described valve body is provided with magnetic-disc
And balancing weight, described magnetic-disc by communication cable connect described in field controller, described balancing weight
The sponson of right active pin it is connected by the toggle affixed with it.
Described field controller is furnished with emergent lithium battery power supply safeguards system.
The invention has the beneficial effects as follows:
(1) simple in construction, is skillfully constructed, and utilizes the gravitational moment behaviour that active pin is formed by the balancing weight outside valve body
The opening and closing of control inner spool, cost of manufacture is low, and safety coefficient is high.
(2) with the gravitional force of balancing weight as emergency power, natural stabilisation, the most persistently, also can communication behaviour
Make, good stability, compatible strong.
(3) it is independent of traditional driving means, the security control more high efficient and reliable of tube pass can be made, keep away
Exempt from prior art owing to the height of driving means is relied on the accident consequence that caused, urgent danger prevention can be realized
Essential safety, to change current passive situation.
(4) flow state can be changed the most fast and automatically, with realize tube pass safety from
Dynamic emergent security control, eliminates flow process leakage etc. simultaneously and may lead to the hidden danger of fire and contamination accident.
(5) may use tank root or the risk prevention system of arbitrary procedure of storage tank, unpowered emergency danger-avoiding, it is not necessary to
Send someone on duty, be independent of other any power and civil power.
Accompanying drawing explanation
Fig. 1 is the configuration state schematic diagram that the opposed double spool of the embodiment of the present invention 1 simultaneously closes off；
Fig. 2 is the configuration state schematic diagram that the opposed double spool of the embodiment of the present invention 1 is opened simultaneously；
Fig. 3 is the configuration state schematic diagram that the embodiment of the present invention 2 single spool is closed；
Fig. 4 is the configuration state schematic diagram that the embodiment of the present invention 2 single spool is opened；
Fig. 5 is the side view of the present invention.
Labelling in figure: 1, field controller；2, valve gap；3, bolt；4, left active pin；5, left
Linking arm；6, left passage；7, left sealing plate；8, left flange；9, left spool；10, right
Spool；11, right flange；12, right passage；13, right sealing plate；14, right linking arm；15、
Valve body；16, right active pin；17, communication cable pipe；18, magnetic-disc；19, balancing weight；20, turn round
The arm of force；22, left crank；23, right crank.
Detailed description of the invention
It is understood to make technical scheme be easier to, below in conjunction with the accompanying drawings with three embodiments
It is described in detail.
Embodiment 1:
With reference to Fig. 1, Fig. 2, Fig. 5, the unpowered pipeline of the present invention is met an urgent need current limliting relief valve, including valve body 15
And connecting the valve gap 2 of described valve body 15 by bolt 3, field controller is installed at the top of described valve gap 2
1, the both sides of described valve body 15 have left passage 6 and right passage 12；The inner side of described left passage 6 sets
Being equipped with left sealing plate 7, the inner side of described left sealing plate 7 is connected by the left active pin 4 being arranged on left crank 22
Connecing left linking arm 5, described left linking arm 5 is installed left spool 9, the outside of described left passage 6 is left method
Blue 8；The inner side of described right passage 12 is provided with right sealing plate 13, and the inner side of described right sealing plate 13 is passed through
The right active pin 16 being arranged on right crank 23 connects right linking arm 14, and described right linking arm 14 is installed
Right spool 10, the outside of described right passage 12 is right flange 11；The rear side of described valve body 15 is provided with magnetic
Dish 18 and two balancing weights 19, described magnetic-disc 18 connects described magnetic field by communication cable 17 and controls
Device 1 processed, two described balancing weights 19 by toggle 20 affixed with it respectively be connected left active pin 4 and
The sponson of right active pin 16.
In embodiment 1, when described left spool 9 and right spool 10 are under the state opened, two institutes
The balancing weight 19 stated and two affixed with it respectively toggles 20 can be rotating around described left active pin 4 and the right sides
The horizontal axis of active pin 16 sponson rotates with certain angular velocity under the support of valve body 15, from
And under synchronizing to drive the left spool 9 within described valve body 15 to rotate with identical angular velocity with right spool 10
Fall, until completely closing left passage 6 and right passage 12；In contrast, when described left spool 9 and right valve
Under the state that core 10 is in closedown, two described balancing weights 19 and toggle 20 affixed with it respectively
Can around the horizontal axis of described left active pin 4 and right active pin 16 sponson under the support of valve body 15 with one
Fixed angular velocity rotates and rises, thus synchronizes to drive the left spool 9 within described valve body 15 and right spool 10
Rotate with identical angular velocity and rise, until fully opening described left passage 6 and right passage 12.
Embodiment 2:
With reference to Fig. 3, Fig. 4, Fig. 5, the unpowered pipeline of the present invention is met an urgent need current limliting relief valve, including valve body 15
And connecting the valve gap 2 of described valve body 15 by bolt 3, field controller is installed at the top of described valve gap 2
1, the both sides of described valve body 15 have left passage 6 and right passage 12；The inner side of described left passage 6 sets
Being equipped with left sealing plate 7, the inner side of described left sealing plate 7 is connected by the left active pin 4 being arranged on left crank 22
Connecing left linking arm 5, described left linking arm 5 is installed left spool 9, the outside of described left passage 6 is left method
Blue 8, the outside of described right passage 12 is right flange 11；The rear side of described valve body 15 is provided with magnetic-disc 18
With balancing weight 19, described magnetic-disc 18 connects described field controller 1, institute by communication cable 17
The balancing weight 19 stated is connected the sponson of left active pin 4 by the toggle 20 affixed with it.
In example 2, when described left spool 9 is under the state opened, described balancing weight 19 and
The toggle 20 affixed with it can be around the horizontal axis of described left active pin 4 sponson at valve body 15
Rotate with certain angular velocity under support, thus drive the left spool 9 within described valve body 15 to rotate
Fall, until completely closing left passage 6；In contrast, it is in the state of closedown when described left spool 9
Under, described balancing weight 19 and the toggle affixed with it can be around described left active pin 4 over-hang parts around 20
The horizontal axis divided rotates with certain angular velocity under the support of valve body 15 and rises, thus drives described valve
Left spool 9 within body 15 rotates and rises, until fully opening described left passage 6.
Embodiment 3:
The present embodiment is the change of embodiment 2, namely: the inner side of described right passage 12 is provided with right close
Shrouding 13, the inner side of described right sealing plate 13 connects the right side by the right active pin 16 being arranged on right crank 23
Linking arm 14, described right linking arm 14 is installed right spool 10, and the outside of described right passage 12 is right
Flange 11；The rear side of described valve body 15 is provided with magnetic-disc 18 and balancing weight 19, described magnetic-disc 18
Connecting described field controller 1 by communication cable 17, described balancing weight 19 is by affixed with it
Toggle 20 connects the sponson of right active pin 16.
In embodiment 3, when described right spool 10 is under the state opened, described balancing weight 19
And the toggle 20 affixed with it can be around the horizontal axis of described right active pin 16 sponson at valve body 15
Support under rotate with certain angular velocity, thus drive the right spool 10 within described valve body 15
Rotate, until completely closing right passage 12；In contrast, it is in closedown when described right spool 10
State under, described balancing weight 19 and the toggle affixed with it can be around described right active pins 16 around 20
The horizontal axis of sponson rotates with certain angular velocity under the support of valve body 15 and rises, thus drives
Right spool 10 within described valve body 15 rotates and rises, until fully opening described right passage 12.
In the above-described embodiment, described field controller 1 is by communication cable 17 and magnetic-disc 18 shape
Become communication to connect, will be automatically recognized when balancing weight 19 rises also near described magnetic-disc 18, and make institute
Described magnetic-disc 18 moment is magnetized by the field controller 1 stated, so that described in two (or one)
Balancing weight 19 is locked by described magnetic-disc 18 adhesive, so that left spool 9 and right spool 10 (or left spool
9 or right spools 10) it is in open mode stable holding；Refer to when described field controller 1 obtains signal
Order, locks the magnetic-disc 18 described in moment releasing the adhesive of two (or one) balancing weights 19, makes
Balancing weight 19 described in two (or one) together with toggle 20 under the driving of self gravitation potential energy around a left side
Active pin 4 and right active pin 16 (or left active pin 4 or right active pin 16) rotate and drive left spool 9 and the right side
Spool 10 (or left spool 9 or right spool 10) is rotated down, thus closes left passage 6 and right passage 12
(or left passage 6 or right passage 12).
Double spool in embodiment 1 is arranged, the startup of double spool, closedown, can synchronize, it is possible to
To select individually to control, thus realize the state switching of tube pass.
The present invention can use wireless telecommunications, PLC circuit module communication, computer remote network communication, radio
The multiple modes of operation such as words communication and on the spot pressing.Field controller therein is furnished with emergent lithium battery power supply
Safeguards system, can uninterruptedly meet an urgent need, and usually can charge the battery with civil power or solar energy, to ensure to have a power failure
Rear system is normal.
Many fact proved, produce cross complexity, valve of storing and transporting system pipeline numerous, the hidden danger of impact safety
Factor is various and is difficult to predict.If Forward thinking, put prevention first, in the storage tanks such as harmful influence and pipe network flow process
The unpowered pipeline of the supporting implantation in the subregion present invention is met an urgent need current limliting relief valve, so that it may guarding safety, reply is not
Survey, once incident, can promptly tackle, take precautions against leakage, fire, pollution equivalent risk, it is achieved flow process safety
Automatically management and control, is preferably minimized loss.
The present invention can make the emergency cut-off of valve be no longer dependent on any power, energy storage equipment and civil power,
The gravitional force relying only on described balancing weight 19 deposit is converted into gravitational moment through toggle 20, just can be left
Active pin 4 and right active pin 16 provide moment of torsion, so that the left spool connected firmly with left active pin 4 and right active pin 16
9 and right spool 10 realize opening and closing action.
As in crude oil storage tank outlet and long distance pipeline flow process reasonable layout, supporting the unpowered of the present invention is set
Pipeline is met an urgent need current limliting relief valve, both can meet the daily production needs automatically controlled, and add again the state of emergency
The auto-control function of lower flow process safety, thus build the emergency preplan of essential safety.
The moment of torsion provided the active pin that spool is fixing due to balancing weight external in the present invention and toggle is not
Subject to conditions, therefore under the control of magnetic-disc, sufficiently large gravitional force can be remained so that it is be in
Uphang state on duty, then, once occur emergency risks situation on fire that flow process on fire maybe may be caused to let out
Leakages etc., the present invention just can realize this area flow shape by automatically controlling or local operation flexibly, rapidly
The management and control of state, thus reach the purpose of urgent danger prevention.
Above by reference to drawings and Examples, technical scheme is schematically described, this description
The most restricted.Those skilled in the art will be understood that in actual applications, all parts in the present invention
Arrange details be all likely to occur some change, and other staff its enlighten under be likely to make similar setting
Meter.Special needs to be pointed out is: without departing from the design aim of the present invention, all obvious details
Change or similar Design, within being all contained in protection scope of the present invention.
Claims (4)
1. unpowered pipeline is met an urgent need a current limliting relief valve, including valve body and be bolted described valve
The valve gap of body, is characterized in that: the top of described valve gap is provided with field controller, and the both sides of described valve body are divided
Left passage and right passage are not set；The inner side of described left passage is provided with left sealing plate, described left sealing plate
Inner side connects left linking arm by the left active pin being arranged on left crank, and described left linking arm installs left valve
Core, the outside of described left passage is left flange；The inner side of described right passage is provided with right sealing plate, the described right side
Sealing plate inner side connect right linking arm by the right active pin that is arranged on right crank, on described right linking arm
Installing right spool, the outside of described right passage is right flange；The rear side of described valve body is provided with connection
Cable connects the magnetic-disc of described field controller and two balancing weights, two described balancing weights by respectively with
Its two affixed toggles connect left active pin and the sponson of right active pin.
2. unpowered pipeline is met an urgent need a current limliting relief valve, including valve body and be bolted described valve body
Valve gap, it is characterized in that: the top of described valve gap is provided with field controller, the both sides of described valve body are respectively
Have left passage and right passage；Left sealing plate it is provided with in the inner side of described left passage, described left sealing plate
Inner side connects left linking arm by the left active pin being arranged on left crank, and described left linking arm installs left valve
Core, the outside of described left passage is left flange, and the outside of described right passage is right flange；After described valve body
Side is provided with magnetic-disc and balancing weight, described magnetic-disc by communication cable connect described in magnetic field control
Device, described balancing weight is connected the sponson of left active pin by the toggle affixed with it.
3. unpowered pipeline is met an urgent need a current limliting relief valve, including valve body and be bolted described valve body
Valve gap, it is characterized in that: the top of described valve gap is provided with field controller, the both sides of described valve body are respectively
Have left passage and right passage；The inner side of described right passage is provided with right sealing plate, described right sealing plate interior
Side connects right linking arm by the right active pin being arranged on right crank, and described right linking arm installs right valve
Core, the outside of described right passage is right flange, and the outside of described left passage is left flange；After described valve body
Side is provided with magnetic-disc and balancing weight, described magnetic-disc by communication cable connect described in magnetic field control
Device, described balancing weight is connected the sponson of right active pin by the toggle affixed with it.
4. meet an urgent need current limliting relief valve according to the unpowered pipeline described in claim 1 or 2 or 3, its feature
It is: described field controller is furnished with emergent lithium battery power supply safeguards system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610425320.0A CN105909835A (en) | 2016-06-11 | 2016-06-11 | Unpowered safety valve for pipeline emergency flow limiting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610425320.0A CN105909835A (en) | 2016-06-11 | 2016-06-11 | Unpowered safety valve for pipeline emergency flow limiting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105909835A true CN105909835A (en) | 2016-08-31 |
Family
ID=56750281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610425320.0A Pending CN105909835A (en) | 2016-06-11 | 2016-06-11 | Unpowered safety valve for pipeline emergency flow limiting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105909835A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3996962A (en) * | 1976-03-19 | 1976-12-14 | Rockwell International Corporation | Backflow preventer and relief valve assembly |
| CN101440886A (en) * | 2008-12-12 | 2009-05-27 | 秦皇岛秦冶重工有限公司 | Electric emergency cut-off valve |
| CN103711918A (en) * | 2013-12-30 | 2014-04-09 | 成都易态科技有限公司 | Discharging device |
| CN103742696A (en) * | 2014-01-02 | 2014-04-23 | 朱志强 | Quick-valve magnetic control gravity emergency drive device |
| CN104089055A (en) * | 2014-07-02 | 2014-10-08 | 南通国电电站阀门有限公司 | Supercritical large-caliber two-direction buffer control type check valve |
| CN104528407A (en) * | 2014-12-05 | 2015-04-22 | 安徽宁国中天环保设备有限公司 | Dust valve with two turning plates and heavy punches |
| CN205689838U (en) * | 2016-06-11 | 2016-11-16 | 朱志强 | A kind of unpowered pipeline is met an urgent need current limliting relief valve |
-
2016
- 2016-06-11 CN CN201610425320.0A patent/CN105909835A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3996962A (en) * | 1976-03-19 | 1976-12-14 | Rockwell International Corporation | Backflow preventer and relief valve assembly |
| CN101440886A (en) * | 2008-12-12 | 2009-05-27 | 秦皇岛秦冶重工有限公司 | Electric emergency cut-off valve |
| CN103711918A (en) * | 2013-12-30 | 2014-04-09 | 成都易态科技有限公司 | Discharging device |
| CN103742696A (en) * | 2014-01-02 | 2014-04-23 | 朱志强 | Quick-valve magnetic control gravity emergency drive device |
| CN104089055A (en) * | 2014-07-02 | 2014-10-08 | 南通国电电站阀门有限公司 | Supercritical large-caliber two-direction buffer control type check valve |
| CN104528407A (en) * | 2014-12-05 | 2015-04-22 | 安徽宁国中天环保设备有限公司 | Dust valve with two turning plates and heavy punches |
| CN205689838U (en) * | 2016-06-11 | 2016-11-16 | 朱志强 | A kind of unpowered pipeline is met an urgent need current limliting relief valve |
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Application publication date: 20160831 |