CN104132247B - The long-range pressure line protection device of pilot operated safety valve - Google Patents
The long-range pressure line protection device of pilot operated safety valve Download PDFInfo
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- CN104132247B CN104132247B CN201410319844.2A CN201410319844A CN104132247B CN 104132247 B CN104132247 B CN 104132247B CN 201410319844 A CN201410319844 A CN 201410319844A CN 104132247 B CN104132247 B CN 104132247B
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Abstract
The present invention relates to a kind of long-range pressure line protection device of pilot operated safety valve; described device includes the first protection medium pipeline; medium input unit is protected in first protection medium line upstream connection first; downstream connection removes pilot operated safety valve pilot valve pressure line, downstream is from upstream on the first protection medium pipeline and is sequentially provided with pressure-regulating valve group, main protection medium check-valves and main protection medium stop valve；Pressure sensor is provided between the pressure-regulating valve and the main protection medium check-valves; pressure controller is provided between the pressure sensor and the pressure-regulating valve; the pressure controller is also associated with overpressure protection safety valve; overpressure protection pipeline is connected between the pressure sensor and the main protection medium check-valves; flare line or air safety area are gone in the overpressure protection pipeline connection, and the overpressure protection pipeline is provided with overpressure protection safety valve.
Description
Technical field
The present invention relates to refine oil and petrochemical industry, and in particular to a kind of long-range pressure line protection of pilot operated safety valve
Device.
Background technology
Pilot operated safety valve as a kind of automatic mechanical type safeguard protection safety valve, by mechanical (such as spring) cause it is outer
Power influences, and when by protection system normal operating, is closed valve seat.When pressure medium is raised in by protection system
And during more than setting, valve is automatically turned on, by preventing from being exceeded by the pressure in protection system to discharge medium outside system
Setting.Pilot operated safety valve, according to its component parts, is broadly divided into main valve and pilot valve two parts.Main valve is relied on from pilot valve
The medium of discharge drives and controls.And pilot valve is safety valve as direct effect, directly it is situated between by by the technique of protection system
Matter drives.The action of pilot operated safety valve is little affected by being influenceed by the back pressure of protection system.When by protection system normal work,
The pilot valve of pilot operated safety valve is closed, and system pressure is delivered to the top of main valve flap by pilot valve and pressure pipe
In air chamber, make pressure at the top and bottom of flap consistent, now main valve is closed main valve by flap gravity.Work as quilt
When protection system reaches setting pressure, pilot valve spring, pilot valve is overcome to open by protection system internal pressure power, pilot valve shuttle closing pilot valve
Inlet channel, the medium of main valve flap top air plenum is discharged by steam vent.Now main valve flap is opened completely, starts to let out
Put.When being reduced to below valve setpoint pressure by protection system pressure, pilot valve returns seat, pilot valve shuttle closed grate hole, connection
Air chamber at the top of processing medium and main valve flap, when main valve flap top is consistent with the pressure of main valve inlet, valve returns seat.
The pressure measurement points of pilot valve, can be arranged on different pressure points according to by the requirement of protection system.It is existing normal
The pressure point set location seen is connected with the main valve inlet of pilot valve.I.e. main valve and pilot valve use the pressure of same pressure point.
The position of another pressure point can be selected on the upstream line or equipment of main valve pressure measurement points, when upstream equipment or pressure
When first fluctuating, the safety valve for being arranged on device downstream will more sensitive sensed pressure change in advance.See accompanying drawing 1, it is this long-range
Ways of measure pressure is more long due to pressure guiding pipeline, and when safety valve is not discharged, pipeline is not circulation status.If aqueous in medium or restructuring
Point, medium may contain solid particle in pilot in-tube condensation or medium, and (such as catalyst dust, medium reaction is generated
Carbon dust etc.), may cause pilot blockage, and then the normal pressure of pilot valve of safety valve is hindered, and cause pilot valve maloperation, cause elder generation
The main valve of pilot valve opens by mistake and opens, is not turned on, or even failsafe valve, so as to influence by the safety in production of protection system.Occur in production
The normal of this kind of long-range pressure of medium influence pilot operated safety valve use, introduce the isolation of protection medium for this problem, blow
Safety valve pilot valve pressure pipeline is swept, introducing this method can ensure the normal pressure of pressure guiding pipeline, so as to ensure that pilot-operated type is pacified
The normal work of full valve, protects corresponding equipment or system.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of simple structure, easy to use, guarantee impulse pipeline will not freeze
It is stifled, and then protect the long-range pressure line protection device of the pilot operated safety valve of relevant device or system.
It is that, up to above-mentioned purpose, the present invention is a kind of long-range pressure line protection device of pilot operated safety valve, described device bag
The first protection medium pipeline is included, medium input unit, downstream connection are protected in the first protection medium line upstream connection first
Pilot operated safety valve pilot valve pressure line is removed, being from upstream to downstream on the first protection medium pipeline is sequentially provided with pressure regulation
Valve, main protection medium check-valves and main protection medium stop valve；The pressure-regulating valve stops with the main protection medium
Return valve between be provided with pressure sensor, pressure controller is provided between the pressure sensor and the pressure-regulating valve, it is described
Pressure controller is also associated with overpressure protection safety valve, connects between the pressure sensor and the main protection medium check-valves
Overpressure protection pipeline is connected to, flare line or air safety area, the overpressure protection pipe are gone in the overpressure protection pipeline connection
Line is provided with overpressure protection safety valve.
Wherein also include the second protection medium pipeline, second medium protection line upstream connection second protects medium defeated
Enter device, the first protection medium pipeline described in downstream connection, the second protection medium pipeline and the described first protection medium tube
Wire terminal is located at the pressure-regulating valve upstream, and being from upstream to downstream on the first protection medium pipeline is sequentially provided with the first guarantor
Shield medium stop valve and the first protection medium check-valves, are from upstream to downstream and are sequentially provided with the on the second protection medium pipeline
Two protection medium stop valves and the second protection medium check-valves.
Wherein described pressure-regulating valve replaces with direct-operated regulator or restriction orifice.
Medium pipeline is upper is additionally provided with heat indicator or stream before or after the pressure-regulating valve group for wherein described protection
Gauge.
The invention difference from existing technology is that the present invention achieves following technique effect：
In the present invention, protection medium is entered in pressure guiding pipeline by control valve group, and protection medium is adjusted by pressure-regulating valve
Section pressure, makes the decompressed pressure after its described pressure-regulating valve between by the setting pressure and quilt of the safety valve pilot valve of protection system
Between the routine operating pressure of protection system, now protect gas anti-in the connecting pipe by a whole set of protection system to safety valve
To blowing medium, prevent pilot blockage visible, the present invention can remain that the pressure pipeline of pilot operated safety valve is unimpeded, have
Effect solves the problems, such as to be blocked in safety valve connecting pipe, maintains safety valve normal work, it is ensured that by the normal operation of protection system.
The invention will be further described below in conjunction with the accompanying drawings.
Brief description of the drawings
Fig. 1 is existing pilot operated safety valve pressure line construction figure；
Fig. 2 is protection system schematic diagram when the long-range pressure line protection device of pilot operated safety valve of the present invention is single medium；
Fig. 3 is that protection system is shown when the long-range pressure line protection device of medium pilot operated safety valves of the invention double is double media
It is intended to.
Description of reference numerals：101- raw material intake pipelines；102- reactors；103- goes pilot operated safety valve pilot valve pressure
Line；104- heat exchangers；105- removes pilot operated safety valve main valve pipeline；106- pilot operated safety valve pilot valves；107- pilot-operated type safety
Valve main valve；108- flare lines；201- first protects medium pipeline；202- first protects medium stop valve；203- first is protected
Medium check-valves；204- second protects medium pipeline；205- second protects medium stop valve；206- second protects medium non-return
Valve；207- pressure-regulating valves；208- pressure controllers；209- pressure sensors；210- pressure alarms；211- overpressure protections are pacified
Full valve；212- mainly protects medium check-valves；213- mainly protects medium stop valve；214- overpressure protection pipelines；215- flows
Meter；216- temperature indicators.
Specific embodiment
Below in conjunction with drawings and Examples, the technical characteristic above-mentioned and other to the present invention and advantage are made in more detail
It is bright.
The long-range pressure line protection device of pilot operated safety valve of the present invention, as shown in Fig. 2 described device includes the first protection
Medium input unit is protected in medium pipeline 201, the first protection medium line upstream connection first, and downstream connection goes pilot-operated type safety
Valve pilot valve pressure line 103, is from upstream to downstream and is sequentially provided with pressure-regulating valve 207, main guarantor on the first protection medium pipeline 201
Shield medium check-valves 212 and main protection medium stop valve 213；Pressure-regulating valve 207 and main protection medium check-valves 212 it
Between be provided with pressure sensor 209, pressure controller 208, pressure control are provided between pressure sensor 209 and pressure-regulating valve 207
Device processed 208 is also associated with overpressure protection safety valve 210, is connected between pressure sensor 209 and main protection medium check-valves 212
There is overpressure protection pipeline 214, flare line 108 or air safety area, overpressure protection pipeline are gone in the connection of overpressure protection pipeline 214
214 are provided with overpressure protection safety valve 211.Second protection medium pipeline 204 can also be set as needed, as shown in figure 3, the
Medium input unit is protected in second medium protection pipeline 204 upstream connection second, and downstream connection first protects medium pipeline 201, the
Two protection medium pipelines 204 and the joint of the first protection medium pipeline 201 are located at the upstream of pressure-regulating valve 207, the first protection medium
Downstream is from upstream on pipeline 201 and is sequentially provided with the first protection medium stop valve 202 and the first protection medium check-valves 203, the
It is from upstream to that downstream is sequentially provided with the second protection medium stop valve 205 and the second protection medium stops on two protection medium pipelines 204
Return valve 206.
According to technique needs, protection medium temperature dial gauge, protection rate-of flow dial gauge, connecting pipe can also be set up and increased
If heat tracing.
So that a certain reactor is normally produced and regenerated as an example, two kinds of different protection media, when normally using, first are selected
Protection medium 205 two stop valves of stop valve of protection medium stop valve 202 or second should keep a valve within the same time
Door is opened, another valve closing, to avoid two kinds of protection media from being used simultaneously, the He of the first protection medium check-valves 203
Second 206 two, protection medium check-valves protection medium check-valves can be used as preventing the first protection medium stop valve 202 and the
The stop valve of two protection medium stop valve 205 is opened simultaneously when, different protection media mutually pollute.
When being in normal use with reactor 102, introduce and said as a example by the first protection medium methane by protection system
It is bright.Conveyed by the first protection medium stop valve 201, process gas methane is as the first protection medium through the first protection medium
The protection medium of stop valve 202 and first check-valves 203 enters pressure-regulating valve 207；Nitrogen as the second protection medium, due to the
The valve of two protection medium stop valve 205 is closed, and causes nitrogen to be mothballed in the second protection medium pipeline 204, together
When the second protection medium stop valve 206 prevent process gas methane from entering in the first protection medium pipeline 204.
Process gas methane is by after the decompression of pressure-regulating valve 207, pressure, Stress control being measured by pressure sensor 209
Device 208 can compare the size of first pressure setting value in value and the pressure controller 208 of the measurement of pressure sensor 209, according to than
The output of larger ditty seamless force controller 208, if the measured value of pressure sensor 209 is more than first pressure setting value, pressure
Controller 208 can reduce output, turn pressure-regulating valve 207 down., whereas if pressure sensor 209 is worth being set less than first pressure
Definite value, pressure controller 208 can increase output, tune up pressure-regulating valve 207.
When the measured value of pressure sensor 209 is more than the second pressure setting value of pressure controller 208, pressure controller
208 can trigger pressure alarm 210, remind operating personnel to note.
If the protection pressure medium of the measurement of pressure sensor 209 continues to raise, and cannot be adjusted by pressure-regulating valve 207
Section, when pressure reaches the setting pressure of overpressure protection safety valve 211, the take-off of overpressure protection safety valve 211, protection medium passes through
Overpressure protection pipeline is released flare line 108 or air safety area.
Finally protection media technology gas methane will be cut off by main protection medium check-valves 212 and main protection medium
Into pilot operated safety valve pilot valve pressure line 103 is removed, first protects medium pipeline and goes pilot operated safety valve pilot valve pressure valve 213
The position of the connection of line 103 should be close to the porch of pilot valve pilot valve 106, convenient to enter to be protected by the medium reverse blow in pressure line
Protecting system reactor 102.
Because generally having two kinds of situations of normal operating and regeneration by protection system reactor.To adapt to by protection device again
Raw operation operating mode, closes the first protection medium stop valve 202 of process gas methane, opens second and protects medium stop valve 205,
(the second protection medium such as nitrogen)
Flow of the second protection medium in protection system is similar to process gas methane.Carried out using identical control system
Regulation.
Second protection medium is in addition to using nitrogen, it is also possible to replaced using inert media.On condition that inert media will not shadow
Sound is connected reaction or product quality in equipment with pilot valve.
As can be seen here, the present invention has advantages below：
(1) in the present invention, according to by the different operating states of protection system, selection suitably protects medium to purge guide
The pilot valve impulse pipeline of valve, it is ensured that pressure guiding pipeline is not blocked, so that the normal production of the normal take-off protection system of safety valve energy.
(2) protection medium is adjusted using pressure controller, pressure alarm is set and mechanical safety valve ensures
The pressure of medium is protected not interfere with by the pilot valve maloperation of the pilot operated safety valve of protection system.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to model of the invention
Enclose and be defined, on the premise of design spirit of the present invention is not departed from, those of ordinary skill in the art are to technical side of the invention
Various modifications and improvement that case is made, all should fall into the protection domain of claims of the present invention determination.
Claims (2)
1. the long-range pressure line protection device of a kind of pilot operated safety valve, it is characterised in that：Described device includes that the first protection is situated between
Medium input unit is protected in matter pipeline, the first protection medium line upstream connection first, and downstream connection goes pilot-operated type safety
Valve pilot valve pressure line, is from upstream to downstream and is sequentially provided with pressure-regulating valve, main protection Jie on the first protection medium pipeline
Matter check-valves and main protection medium stop valve；Pressure is provided between the pressure-regulating valve and the main protection medium check-valves
Force snesor, is provided with pressure controller between the pressure sensor and the pressure-regulating valve, the pressure controller also connects
Overpressure protection safety valve is connected to, overpressure protection pipe is connected between the pressure sensor and the main protection medium check-valves
Flare line or air safety area are gone in line, the overpressure protection pipeline connection, and the overpressure protection pipeline is provided with superpressure guarantor
Shield safety valve；
Also include the second protection medium pipeline, medium input unit is protected in the second protection medium line upstream connection second,
First protection medium pipeline described in downstream connection, the second protection medium pipeline and the described first protection medium pipe joint position
Downstream being from upstream in the pressure-regulating valve upstream, on the first protection medium pipeline and being sequentially provided with the first protection medium cut
Disconnected valve and the first protection medium check-valves, are from upstream to downstream and are sequentially provided with the second protection Jie on the second protection medium pipeline
Matter stop valve and the second protection medium check-valves；
Wherein, medium pipeline is upper that heat indicator or flow are additionally provided with before or after the pressure-regulating valve for first protection
Meter.
2. the long-range pressure line protection device of pilot operated safety valve according to claim 1, it is characterised in that：The pressure
Regulating valve replaces with direct-operated regulator or restriction orifice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410319844.2A CN104132247B (en) | 2014-07-07 | 2014-07-07 | The long-range pressure line protection device of pilot operated safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410319844.2A CN104132247B (en) | 2014-07-07 | 2014-07-07 | The long-range pressure line protection device of pilot operated safety valve |
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| Publication Number | Publication Date |
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| CN104132247A CN104132247A (en) | 2014-11-05 |
| CN104132247B true CN104132247B (en) | 2017-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410319844.2A Active CN104132247B (en) | 2014-07-07 | 2014-07-07 | The long-range pressure line protection device of pilot operated safety valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111536304B (en) * | 2020-04-07 | 2022-03-22 | 南京钢铁股份有限公司 | Method for judging take-off of pilot operated safety valve |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201410485Y (en) * | 2009-06-04 | 2010-02-24 | 广州创特技术有限公司 | Air conveying cleaning device |
| CN101884989A (en) * | 2010-06-24 | 2010-11-17 | 瓮福（集团）有限责任公司 | Method for dredging pressure guiding system by using high-pressure nitrogen backblowing |
| CN202860936U (en) * | 2012-07-13 | 2013-04-10 | 中国一冶集团有限公司 | Pressure tapping pipeline purging device |
| CN204042454U (en) * | 2014-07-07 | 2014-12-24 | 中国寰球工程公司 | The long-range pressure line protective gear of Pilot operated safety valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8430112B2 (en) * | 2010-07-13 | 2013-04-30 | Siemens Industry, Inc. | Slurry feed system and method |
-
2014
- 2014-07-07 CN CN201410319844.2A patent/CN104132247B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201410485Y (en) * | 2009-06-04 | 2010-02-24 | 广州创特技术有限公司 | Air conveying cleaning device |
| CN101884989A (en) * | 2010-06-24 | 2010-11-17 | 瓮福（集团）有限责任公司 | Method for dredging pressure guiding system by using high-pressure nitrogen backblowing |
| CN202860936U (en) * | 2012-07-13 | 2013-04-10 | 中国一冶集团有限公司 | Pressure tapping pipeline purging device |
| CN204042454U (en) * | 2014-07-07 | 2014-12-24 | 中国寰球工程公司 | The long-range pressure line protective gear of Pilot operated safety valve |
Non-Patent Citations (1)
| Title |
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| A46F先导式安全阀工作原理及故障解决方法;cnpv2008;《百度文库》;20131231;2 * |
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Address after: No.1, Chuangda 2nd Road, Laiguangying hi tech Industrial Park, Chaoyang District, Beijing, 100012 Patentee after: CHINA HUANQIU CONTRACTING & ENGINEERING Co.,Ltd. Address before: No.1, Chuangda 2nd Road, Laiguangying hi tech Industrial Park, Chaoyang District, Beijing, 100012 Patentee before: CHINA HUANQIU CONTRACTING & ENGINEERING Corp. |
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Effective date of registration: 20210309 Address after: 100120 Xicheng District six paw Kang in Beijing City Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CHINA HUANQIU CONTRACTING & ENGINEERING Co.,Ltd. Address before: No.1, Chuangda 2nd Road, Laiguangying hi tech Industrial Park, Chaoyang District, Beijing, 100012 Patentee before: CHINA HUANQIU CONTRACTING & ENGINEERING Co.,Ltd. |
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