CN103410471B - Pneumatic well head safe control system - Google Patents
Pneumatic well head safe control system Download PDFInfo
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- CN103410471B CN103410471B CN201310372589.3A CN201310372589A CN103410471B CN 103410471 B CN103410471 B CN 103410471B CN 201310372589 A CN201310372589 A CN 201310372589A CN 103410471 B CN103410471 B CN 103410471B
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Abstract
The present invention relates to natural gas well head safety control device, i.e. pneumatic well head safe control system, comprise control panel, high-pressure pilot valve, low pressure pilot, fusible plug and pneumatic block valve; The outlet of the high-pressure pilot valve import interface on described high-pressure pilot valve and control panel is serially connected with low pressure pilot after connecting, and the outlet of this high-pressure pilot valve is connected to the import of low pressure pilot, and the outlet of low pressure pilot is connected to the import of the low pressure pilot discharge coupling on control panel; Described high-pressure pilot valve and low pressure pilot are installed in and converge on tracheae, and the impulse test stop valve I that this remittance tracheae is arranged is connected on the super decompression sensing point on site plant or pipeline; Described fusible plug is arranged on well head region; Described pneumatic block valve is arranged on the rear end of the flap type of well head christmas tree; Described electromagnetic valve is all connected with the automation control system with RTU or PLC control strip with valve position feedback device.Invention increases the safety of natural gas gas production wellhead and the feature of environmental protection, achieve remote automation control and reduce use cost.
Description
Technical field
The present invention relates to a kind of natural gas well head safety control device, especially a kind of pneumatic well head safe control system improving the safety of natural gas gas production wellhead and the feature of environmental protection, remote auto controlization and reduction use cost.
Background technology
Within 2005, the national GB50350-2005 " oil-gas gathering and transportation design rule method " promulgated requires that gas well mouth should install well head high-low pressure emergency shutdown valve, the APISPEC6A " wellhead assembly and production tree equipment code " that American Petroleum Institute (API) promulgates and APIRP14C " recommended practice of the analysis of offshore production platform flooring-safe system, design, Installation And Test " has also made corresponding requirement to ground well mouth release valve and control system respectively, comprehensive APISPEC6A and APIRP14C, has complete and requirement accurately to well head safe control system abroad.
The well head high-low pressure emergency shutdown system that China's current gas recovery well well head is installed roughly adopts following control system:
A kind ofly adopt traditional hydraulic control system (Wellhead safety hydraulic cut-off system, application number: 200520009817.1, notification number: CN2823731), its composition adopts traditional hydraulic component, control logic is complicated, and by high-low pressure pilot valve draining closing well, the degree of reliability is low, only have simultaneously super decompression automatically block or manual break-in facility, controlled pressure at least up to more than 10MPa, need that manual pressure could be opened, labour intensity greatly, cannot automation control system be dropped into.
Gas-liquid linked control system (the control system of well mouth release valve of another kind of employing, application number: 200510089173.6, notification number: CN1908365A), need gas-liquid two kinds of power, its two covers control logic is more complicated, corresponding structure is also more complicated, also cannot drop into automation control system simultaneously.
Another adopts electric-linked control system (electricity, gas double control high-pressure oil-gas well safety cut-off device, application number: 03117349.7, notification number: CN1431382A), it adopts the unstripped gas of high pressure as power, there is Explosion-Proof, ECU cannot be anti-interference, have impact on the stability of system, and handling is also lower, cannot implement closing well on the spot, function is incomplete.
Above-mentioned several control system; their high/low pressure sensing point is all arranged at necessarily; namely the requirement of site technique security of system protection cannot be met; also the requirement that site safety value constantly changes cannot be met; simultaneously neither the well head safe control system of complete set, do not meet API(American Petroleum Institute (API) yet) no matter above-mentioned two kinds of standard-requireds of promulgating are that unstripped gas or hydraulic oil are as power; when discharging or leak, pollution to a certain degree all can be caused to environment.
In sum, the control logic of the well head high-low pressure emergency shutdown valve (i.e. well head high-low pressure emergency shutdown control system) of prior art is complicated, function singleness, automaticity is low, handling is low, cannot solve Explosion-Proof, simultaneously also can cause pollution to a certain degree to environment, cannot as the well head safe control system of complete set.
Summary of the invention
The object of the invention is to overcome above-mentioned technical disadvantages, two kinds of pneumatic well head safe control systems improving natural gas gas production wellhead safety and the feature of environmental protection, operation continuity, remote auto controlization and reduction use cost are provided.
A kind of technical scheme adopted for realizing above-mentioned purpose of the present invention is: a kind of pneumatic well head safe control system, comprises control panel, high-pressure pilot valve, low pressure pilot, fusible plug and pneumatic block valve; Wherein:
Described control panel comprises straight-through valve again, and the entrance of this straight-through valve is connected to the outlet of gas source interface, and the outlet of straight-through valve is connected to the import of relay valve; The outlet of described relay valve is connected to point two-way after the import of unloader, one road is connected to the import of SSV interface, pressure meter I is provided with between SSV interface and unloader, an other road connects the import of pressure regulator valve, needle valve, high-pressure pilot valve import interface successively, and between needle valve and high-pressure pilot valve import interface, the import of fusible plug interface is received on a point road; The back pressure interface of described relay valve receives the outlet of tee ball valve, pressure meter II is provided with between this tee ball valve and relay valve, the outlet of electromagnetic valve is received in an import of described tee ball valve, is connected after the import of electromagnetic valve is received in another import of tee ball valve with the outlet of low pressure pilot discharge coupling; The import of discharge protector received by described relay valve, electromagnetic valve after being communicated with the evacuation port of unloader;
The outlet of the high-pressure pilot valve import interface on described high-pressure pilot valve and control panel is serially connected with low pressure pilot after connecting, and the outlet of this high-pressure pilot valve is connected to the import of low pressure pilot, and the outlet of low pressure pilot is connected to the import of the low pressure pilot discharge coupling on control panel; Described high-pressure pilot valve and low pressure pilot are installed in and converge on tracheae, the import of this remittance tracheae is connected to the outlet of impulse test stop valve I, remittance tracheae and impulse are tested between stop valve I and are provided with pressure meter III, and the import of impulse test stop valve I is connected on the super decompression sensing point on site plant or pipeline;
Described fusible plug is arranged on well head region, and the import of fusible plug is connected to the outlet of the fusible plug interface on control panel;
Described pneumatic block valve is arranged on the rear end of the production gate valve of well head christmas tree, this pneumatic block valve is provided with QRV Quick Release Valve and valve position feedback device, the import of QRV Quick Release Valve is connected to the outlet of the SSV interface on control panel, and the outlet of QRV Quick Release Valve is connected to the import of pneumatic block valve;
Described electromagnetic valve is all connected with the automation control system with RTU or PLC control strip with valve position feedback device, by the keying of automation control system Controlling solenoid valve 12 and the on off state of supervision valve position feedback device 24;
During use, gas source interface and source of the gas are connected.Source of the gas adopts the instrument such as inert gas or the compressed air wind such as nitrogen as power.
Another technical scheme adopted for realizing above-mentioned purpose of the present invention is: a kind of pneumatic well head safe control system, comprises control panel, high-pressure pilot valve, low pressure pilot, fusible plug and pneumatic block valve; Wherein:
Described control panel comprises straight-through valve again, and the entrance of this straight-through valve is connected to the outlet of gas source interface, and the outlet of straight-through valve is connected to the import of relay valve; The outlet of relay valve is connected to point two-way after the import of unloader, and a road is connected to the import of SSV interface, is provided with pressure meter I between SSV interface and unloader, and an other road connects the import of pressure regulator valve, needle valve, high-pressure pilot valve import interface successively; Bifurcation road again between described needle valve and high-pressure pilot valve import interface, the import of low pressure pilot import interface received by a branch road, and the import of fusible plug interface received by another branch road; The back pressure interface of described relay valve receives the outlet of two position three-way valve, pressure meter II is set between this two position three-way valve and relay valve, the import of two position three-way valve is connected to the outlet of tee ball valve, the back pressure interface of two position three-way valve is connected to the outlet of low pressure pilot discharge coupling, the outlet of electromagnetic valve is received in an import of tee ball valve, receives the outlet of high-pressure pilot valve discharge coupling after the import of electromagnetic valve is received in another import of tee ball valve again; Described relay valve, electromagnetic valve, two position three-way valve receive the import of discharge protector after being communicated with the evacuation port of unloader;
Described high-pressure pilot valve is arranged on impulse test stop valve V, pressure meter V is provided with between this impulse test stop valve V and high-pressure pilot valve, the import of impulse test stop valve V is connected on the superpressure sensing point on site plant or pipeline, the import of high-pressure pilot valve is connected to the outlet of the high-pressure pilot valve import interface on control panel, and the outlet of high-pressure pilot valve is connected to the import of the high-pressure pilot valve discharge coupling on control panel;
Described low pressure pilot is arranged on impulse test stop valve II, pressure meter IV is provided with between this impulse test stop valve II and low pressure pilot, the import of impulse test stop valve II is connected on the decompression sensing point on site plant or pipeline, the import of low pressure pilot is connected to the outlet of the low pressure pilot import interface on control panel, and the outlet of low pressure pilot is connected to the import of the low pressure pilot discharge coupling on control panel;
Described fusible plug is arranged on well head region, and the import of fusible plug is connected to the outlet of the fusible plug interface on control panel;
Described pneumatic block valve is arranged on the rear end of the production gate valve of well head christmas tree, this pneumatic block valve is provided with QRV Quick Release Valve and valve position feedback device, the import of QRV Quick Release Valve is connected to the outlet of the SSV interface on control panel, and the outlet of QRV Quick Release Valve is connected to the import of pneumatic block valve;
Described electromagnetic valve is all connected with the automation control system with RTU or PLC control strip with valve position feedback device, by the keying of automation control system Controlling solenoid valve and the on off state of supervision valve position feedback device;
During use, gas source interface and source of the gas are connected.Source of the gas adopts the instrument such as inert gas or the compressed air wind such as nitrogen as power.
Said system achieves when superpressure, decompression and fire occur and automatically blocks, and adopts the instrument such as inert gas or the compressed air wind such as hypobaric nitrogen as power, effectively solves power source Explosion-Proof, improves the feature of environmental protection.Connect with active control system, effectively achieve automation, reduce the safety of recruitment cost and the gas production of raising well head.
Accompanying drawing explanation
The nonlimiting examples that the present invention can be provided by accompanying drawing further illustrates.
Fig. 1 is that the present invention's pneumatic well head safe control system high-pressure pilot valve is connected with low pressure pilot schematic diagram.
Fig. 2 is the present invention's pneumatic well head safe control system high-pressure pilot valve and low pressure pilot principle of parallel figure.
Fig. 3 is the structural representation of high-pressure pilot valve of the present invention.
Fig. 4 is the structural representation of low pressure pilot of the present invention.
Fig. 5 is the structural representation of valve pocket A in high-pressure pilot valve of the present invention and low pressure pilot.
Fig. 6 is the structural representation of two position three-way valve of the present invention.
Fig. 7 is the structural representation of relay valve of the present invention.
In figure: 1, control panel; 2, gas source interface; 3, straight-through valve; 4, relay valve; 5, unloader; 6, pressure meter I; 7, SSV interface; 8, pressure regulator valve; 9, needle valve; 10, high-pressure pilot valve import interface; 11, fusible plug interface; 12, electromagnetic valve; 13, tee ball valve; 14, low pressure pilot discharge coupling; 15, pressure meter II; 16, protector is discharged; 17, fusible plug; 18, high-pressure pilot valve; 19, low pressure pilot, 20, converge tracheae; 21, pressure meter III; 22, impulse test stop valve I; 23 QRV Quick Release Valves; 24 valve position feedback devices; 25, pneumatic block valve; 26, low pressure pilot import interface; 27, high-pressure pilot valve discharge coupling, 28 two position three-way valves; 29, pressure meter IV; 30, impulse test stop valve II; 31, impulse test stop valve V; 32, pressure meter V; 33, valve A; 34, valve pocket A; 35, spool A; 36, adjusting screw(rod) A; 37, spring conductor rod A; 38, spring A; 39, spool I A is sensed; 40, medium runner hole A; 41, medium runner hole B; 42, medium runner hole C; 43, annular groove A; 44, annular groove B; 45, annular groove C; 46, through hole A; 47, hold-down nut A; 48, annular groove D; 49, valve A is responded to; 50, spool II is sensed; 51, pressure communication channel A; 52, aperture I A; 53, locking nut A; 54, valve B; 55, spool B; 56, spring B; 57, valve gap B; 58, medium runner hole A I; 59, medium runner hole B I; 60, medium runner hole C I; 61, medium runner hole D I; 62, screwed hole B; 63, annular groove E I; 64, valve pocket B is increased; 65, valve core head B is increased; 66, valve gap C; 67, medium runner hole D II; 68, sealed aperture; 69, chute; 70, valve pocket C is increased; 71, spring C I; 72, spool C; 73, valve body C; 74, medium runner hole A II; 75, annular groove E II; 76, erecting of panel nut; 77, pintle hook lock pin; 78, pintle hook lock nut; 79, spring C II; 80, locking nut C; 81, handle ball; 82, annular groove G II; 83, medium runner hole C II; 84, annular groove F II; 85, medium runner hole B II; 86, large piston C; 87, valve piston C.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described:
See accompanying drawing 1, a kind of pneumatic well head safe control system, comprises control panel 1, high-pressure pilot valve 18, low pressure pilot 19, fusible plug 17 and pneumatic block valve 25; Wherein:
Described control panel 1 comprises again straight-through valve 3, and the entrance of this straight-through valve 3 is connected to the outlet of gas source interface 2, and the outlet of straight-through valve 3 is connected to the import of relay valve 4; The outlet of described relay valve 4 is connected to point two-way after the import of unloader 5, one road is connected to the import of SSV interface 7, pressure meter I 6 is provided with between SSV interface 7 and unloader 5, an other road connects the import of pressure regulator valve 8, needle valve 9, high-pressure pilot valve import interface 10 successively, and between needle valve 9 and high-pressure pilot valve import interface 10, the import of fusible plug interface 11 is received on a point road; The back pressure interface of described relay valve 4 receives the outlet of tee ball valve 13, pressure meter II 15 is provided with between this tee ball valve 13 and relay valve 4, the outlet of electromagnetic valve 12 is received in an import of described tee ball valve 13, is connected after the import of electromagnetic valve 12 is received in another import of tee ball valve 13 with the outlet of low pressure pilot discharge coupling 14; The import of discharge protector 16 received by described relay valve 4, electromagnetic valve 12 after being communicated with the evacuation port of unloader 5;
Described high-pressure pilot valve 18 and the outlet of the high-pressure pilot valve import interface 10 on control panel 1 are serially connected with low pressure pilot 19 after connecting, the outlet of this high-pressure pilot valve 18 is connected to the import of low pressure pilot 19, and the outlet of low pressure pilot 19 is connected to the import of the low pressure pilot discharge coupling 14 on control panel 1; Described high-pressure pilot valve 18 and low pressure pilot 19 are installed in and converge on tracheae 20, the import of this remittance tracheae 20 is connected to the outlet of impulse test stop valve I 22, remittance tracheae 20 and impulse are tested between stop valve I 22 and are provided with pressure meter III 21, and the import of impulse test stop valve I 22 is connected on the super decompression sensing point on site plant or pipeline;
Described fusible plug 17 is arranged on well head region, and the import of fusible plug 17 is connected to the outlet of the fusible plug interface 11 on control panel 1;
Described pneumatic block valve 25 is arranged on the rear end of the production gate valve of well head christmas tree, this pneumatic block valve 25 is provided with QRV Quick Release Valve 23 and valve position feedback device 24, the import of QRV Quick Release Valve 23 is connected to the outlet of the SSV interface 7 on control panel 1, and the outlet of QRV Quick Release Valve 23 is connected to the import of pneumatic block valve 25;
Described electromagnetic valve 12 is all connected with the automation control system with RTU or PLC control strip with valve position feedback device 24, by the keying of automation control system Controlling solenoid valve 12 and the on off state of supervision valve position feedback device (24);
During use, gas source interface and source of the gas are connected.
Specifically:
Open straight-through valve 3, ensure that source of the gas gas enters the import of relay valve 4, when after manual unlocking relay valve 4, source of the gas gas arrives at unloader 5 respectively by relay valve 4, pressure meter I 6 and pressure regulator valve 8, and by SSV interface 7, QRV Quick Release Valve 23 enters pneumatic block valve 25, realize pneumatic block valve 25 to open, regulate pressure regulator valve 8, source of the gas gas will by passing through needle valve 9 after pressure regulator valve 8 successively, high-pressure pilot valve import interface 10, high-pressure pilot valve 18, low pressure pilot 19, another import of tee ball valve 13 is arrived at after low pressure pilot discharge coupling 14, an import of tee ball valve 13 is entered again by electromagnetic valve 12, by the back pressure interface of the outlet low pressure relay valve of tee ball valve 13, realize the automatic unlatching of relay valve 4, automated system operation.
When after manual-lock relay valve 4, relay valve 4 to be released unloader 5 and pressure meter I 6 by its evacuation port, and to be released QRV Quick Release Valve 23 sections of pressure by SSV interface 7, and QRV Quick Release Valve 23 opens the pressure of pneumatic block valve 25 of releasing automatically, pneumatic block valve 25 is closed automatically, realizes manual closing well.
When superpressure sensing point detects pressure superelevation, high-pressure pilot valve 18 will discharge it by an evacuation port and export to relay valve 4 back pressure interface section pressure, relay valve 4 is closed automatically, relay valve 4 to be released unloader 5 and pressure meter I 6 by its evacuation port, and to be released QRV Quick Release Valve 23 sections of pressure by SSV interface 7, QRV Quick Release Valve 23 opens the pressure of pneumatic block valve 25 of releasing automatically, and pneumatic block valve 25 is closed automatically, realizes the automatic closing well of superpressure.
When decompression sensing point detects hypotony, low pressure pilot 19 will discharge it by an evacuation port and export to relay valve 4 back pressure interface section pressure, relay valve 4 is closed automatically, relay valve 4 to be released unloader 5 and pressure meter I 6 by its evacuation port, and to be released QRV Quick Release Valve 23 sections of pressure by SSV interface 7, QRV Quick Release Valve 23 opens the opening pressure of pneumatic block valve 25 of releasing automatically, and pneumatic block valve 25 is closed automatically, realizes the automatic closing well of decompression.
When well head region breaking out of fire accident, fusible plug 17 melts and exports to relay valve 4 back pressure interface section pressure by directly discharging pressure regulator valve 8, relay valve 4 is closed automatically, relay valve 4 to be released unloader and pressure meter I 6 by its evacuation port, and to be released QRV Quick Release Valve 23 sections of pressure by SSV interface 7, QRV Quick Release Valve 23 opens the pressure of pneumatic block valve 25 of releasing automatically, and pneumatic block valve 25 is closed automatically, realizes the automatic closing well of fire.
When automation control system sends closing well instruction, electromagnetic valve 12 power down, electromagnetic valve 12 will discharge it by an evacuation port and export to relay valve 4 back pressure interface section pressure, relay valve 4 is closed automatically, relay valve 4 to be released unloader and pressure meter I 6 by its evacuation port, and to be released QRV Quick Release Valve 23 sections of pressure by SSV interface 7, and QRV Quick Release Valve 23 opens the pressure of pneumatic block valve 25 of releasing automatically, pneumatic block valve 25 is closed automatically, realizes Long-distance Control closing well.
After pulling tee ball valve 13 handle, electromagnetic valve 12 conductively-closed, can not affect the normal operation of native system on the maintenance of automation control system putting maintenance into practice.
When pneumatic block valve 25 is in opening, valve position feedback device 24 by " valve leaves " feedback of status to automation control system.
When pneumatic block valve 25 is in closed condition, valve position feedback device 24 by " valve pass " feedback of status to automation control system.
See accompanying drawing 2, for adapting to surpass, decompression sensing point not at the process environments of same point, pneumatic well head safe control system, comprises control panel 1, high-pressure pilot valve 18, low pressure pilot 19, fusible plug 17 and pneumatic block valve 25; Wherein:
Described control panel 1 comprises again straight-through valve 3, and the entrance of this straight-through valve 3 is connected to the outlet of gas source interface 2, and the outlet of straight-through valve 3 is connected to the import of relay valve 4; The outlet of relay valve 4 is connected to point two-way after the import of unloader 5, one road is connected to the import of SSV interface 7, be provided with pressure meter I 6 between SSV interface 7 and unloader 5, an other road connects the import of pressure regulator valve 8, needle valve 9, high-pressure pilot valve import interface 10 successively; Bifurcation road again between described needle valve 9 and high-pressure pilot valve import interface 10, the import of low pressure pilot import interface 26 received by a branch road, and the import of fusible plug interface 11 received by another branch road; The back pressure interface of described relay valve 4 receives the outlet of two position three-way valve 28, between this two position three-way valve 28 and relay valve 4, pressure meter II 15 is set, the import of two position three-way valve 28 is connected to the outlet of tee ball valve 13, the back pressure interface of two position three-way valve 28 is connected to the outlet of low pressure pilot discharge coupling 14, the outlet of electromagnetic valve 12 is received in an import of tee ball valve 13, receives the outlet of high-pressure pilot valve discharge coupling 27 after the import of electromagnetic valve 12 is received in another import of tee ball valve 13 again; Described relay valve 4, electromagnetic valve 12, two position three-way valve 28 receive the import of discharge protector 16 after being communicated with the evacuation port of unloader 5;
Described high-pressure pilot valve 18 is arranged on impulse test stop valve V 31, pressure meter V 32 is provided with between this impulse test stop valve V 31 and high-pressure pilot valve 18, the import of impulse test stop valve V 31 is connected on the superpressure sensing point on site plant or pipeline, the import of high-pressure pilot valve 18 is connected to the outlet of the high-pressure pilot valve import interface 10 on control panel 1, and the outlet of high-pressure pilot valve 18 is connected to the import of the high-pressure pilot valve discharge coupling 27 on control panel 1;
Described low pressure pilot 19 is arranged on impulse test stop valve II 30, pressure meter IV 29 is provided with between this impulse test stop valve II 30 and low pressure pilot 19, the import of impulse test stop valve II 30 is connected on the decompression sensing point on site plant or pipeline, the import of low pressure pilot 19 is connected to the outlet of the low pressure pilot import interface 26 on control panel 1, and the outlet of low pressure pilot 19 is connected to the import of the low pressure pilot discharge coupling 14 on control panel 1;
Described fusible plug 17 is arranged on well head region, and the import of fusible plug 17 is connected to the outlet of the fusible plug interface 11 on control panel 1;
Described pneumatic block valve 25 is arranged on the rear end of the production gate valve of well head christmas tree, this pneumatic block valve 25 is provided with QRV Quick Release Valve 23 and valve position feedback device 24, the import of QRV Quick Release Valve 23 is connected to the outlet of the SSV interface 7 on control panel 1, and the outlet of QRV Quick Release Valve 23 is connected to the import of pneumatic block valve 25;
Described electromagnetic valve 12 is all connected with the automation control system with RTU or PLC control strip with valve position feedback device 24, by the keying of automation control system Controlling solenoid valve 12 and the on off state of supervision valve position feedback device 24;
During use, gas source interface and source of the gas are connected.
Specifically:
Open straight-through valve 3, ensure that source of the gas gas enters the import of relay valve 4, when after manual unlocking relay valve 4, source of the gas gas arrives at unloader 5 respectively by relay valve 4, pressure meter I 6 and pressure regulator valve 8, and enter pneumatic block valve 25 by SSV interface 7 QRV Quick Release Valve, realize pneumatic block valve 25 to open, regulate pressure regulator valve 8, source of the gas gas will by dividing two-way by needle valve 9 is rear after pressure regulator valve 8 successively, one tunnel enters low pressure pilot import interface 26 successively, low pressure pilot 19, two position three-way valve 28 back pressure interface is arrived at after low pressure pilot discharge coupling 27, realize two position three-way valve 28 to open, another road is successively by arriving at another import of tee ball valve 13 after high-pressure pilot valve import interface 10, high-pressure pilot valve 18, high-pressure pilot valve discharge coupling 14, an import of tee ball valve 13 is entered again by electromagnetic valve 12, by the back pressure interface of the outlet low pressure relay valve of tee ball valve 13, realize the automatic unlatching of relay valve 4, automated system operation.
When after manual-lock relay valve 4, relay valve 4 to be released unloader 5 and pressure meter I 6 by its evacuation port, and to be released QRV Quick Release Valve 23 sections of pressure by SSV interface 7, QRV Quick Release Valve 23 opens the opening pressure of pneumatic block valve 25 of releasing automatically, pneumatic block valve 25 is closed automatically, realizes manual closing well.
When superpressure sensing point detects pressure superelevation, high-pressure pilot valve 18 will discharge it by an evacuation port and export to relay valve 4 back pressure interface section pressure, relay valve 4 is closed automatically, relay valve 4 to be released unloader 5 and pressure meter I 6 by its evacuation port, and to be released QRV Quick Release Valve 23 sections of pressure by SSV interface 7, QRV Quick Release Valve 23 opens the opening pressure of pneumatic block valve 25 of releasing automatically, and pneumatic block valve 25 is closed automatically, realizes the automatic closing well of superpressure.
When decompression sensing point detects hypotony, low pressure pilot 19 will discharge the back pressure interface section pressure that it exports to two position three-way valve 28 by its evacuation port, two position three-way valve 28 discharges it by its evacuation port after automatically closing and exports to relay valve 4 back pressure interface section pressure, relay valve 4 is closed automatically, relay valve 4 to be released unloader 5 and pressure meter I 6 by its evacuation port, and to be released QRV Quick Release Valve 23 sections of pressure by SSV interface 7, QRV Quick Release Valve 23 opens the opening pressure of pneumatic block valve 25 of releasing automatically, pneumatic block valve 25 is closed automatically, realize the automatic closing well of decompression.
Said system achieves when superpressure, decompression and fire occur and automatically blocks, and adopts the instrument such as inert gas or the compressed air wind such as hypobaric nitrogen as power, effectively solves power source Explosion-Proof, improves the feature of environmental protection.Connect with active control system, effectively achieve automation, reduce the safety of recruitment cost and the gas production of raising well head.
For improve further whole system response speed, reduce controlled pressure and make control logic simple, multiple functional, improve automaticity and handling, several valves in said system adopt following structure:
See accompanying drawing 3 ~ 5, above-described embodiment, preferably: described high-pressure pilot valve 18 or low pressure pilot 19 comprise valve A 33, is fixed with valve pocket A34 left section of the inner chamber of valve A 33, is provided with spool A35 in valve pocket A34; Adjusting screw(rod) A36 is fixed with right section of the inner chamber of valve A 33, spring conductor rod A37 is provided with between adjusting screw(rod) A36 and spool A35, spring conductor rod A37 right-hand member stretches in adjusting screw(rod) A36, in the bar section of the spring conductor rod A37 between spring conductor rod A37 and adjusting screw(rod) A36, cover has spring A38, and the left end of spring conductor rod A37 is tight against at spool A35 right-hand member; The left end of described valve A 33 is fixed with Inductance valve, and the left end of spool A35 is tight against the sense spool A right-hand member at this Inductance valve;
The valve A 33 installing valve pocket A34 place is provided with medium runner hole A40, medium runner hole B41 and medium runner hole C42, described medium runner hole A40 and medium runner hole B41 is positioned at the same sidewall on valve A 33, and medium runner hole C42 is positioned on the sidewall relative with sidewall residing for medium runner hole A40 and medium runner hole B41;
Described valve pocket A34 is provided with and annular groove A43, the annular groove B44 of medium runner hole A40, medium runner hole B41 and medium runner hole C42 Corresponding matching and annular groove C45, annular groove A43, annular groove B44 and annular groove C45 are provided with through hole A46, realize medium runner hole C42 and the A40 conducting of medium runner hole or matter runner hole C42 and the B41 conducting of medium runner hole by through hole A46;
Annular groove A43, the annular groove B44 of described valve pocket A34 and all sealed by O RunddichtringO between annular groove C45 both sides place and valve A 33;
The Inductance valve of described high-pressure pilot valve 18 comprises induction valve body A49, be arranged on sensing spool I A39 of right section of induction valve body A49 inner chamber, the pressure guide hole communicated with sensing spool I A39 inner chamber, sealed by O RunddichtringO between sensing spool I A39 and induction valve body A49, the left end of spool A35 is tight against the right-hand member at this sensing spool I A39; Induction valve body A49 inner chamber is provided with super-pressure sensing hole, middle pressure sensitivity gaging hole and ultralow pressure sensing hole, and described super-pressure sensing hole, middle pressure sensitivity gaging hole and ultralow pressure sensing hole are stepped; Be arranged on the sensing spool II 50 in sensing spool I A39 inner chamber, after the left end of sensing spool II 50 stretches out sensing spool I A39 inner chamber be positioned at the super-pressure responded on valve body A49 inner chamber and sense hole and mate, sensing spool II 50 is spacing by the positive stop lug boss be positioned in the middle part of it, sealed by O RunddichtringO between sensing spool II 50 and induction valve body A49, pressure sensor enters super-pressure sensing hole from the pressure communication channel A51 induction valve body A49, form super-pressure Inductance valve, in order to set up the super decompression setting value of described pilot valve within the scope of super-pressure;
The Inductance valve of described low pressure pilot 19 comprises induction valve body A49, be arranged on sensing spool I A39 of right section of induction valve body A49 inner chamber, the pressure guide hole communicated with sensing spool I A39 inner chamber, sealed by O RunddichtringO between sensing spool I A39 and induction valve body A49, the left end of spool A35 is tight against the right-hand member at this sensing spool II 50, induction valve body A49 inner chamber is provided with super-pressure sensing hole, middle pressure sensitivity gaging hole and ultralow pressure sensing hole, and described super-pressure sensing hole, middle pressure sensitivity gaging hole and ultralow pressure sensing hole are stepped, the sensing spool II 50 be arranged in sensing spool I A39 inner chamber will sense the shutoff of spool I A39 inner chamber right-hand member, sensing spool II 50 is spacing by the positive stop lug boss be positioned in the middle part of it, sealed by O RunddichtringO between sensing spool II 50 and sensing spool I A39, the right-hand member of sensing spool I A39 be positioned at the ultralow pressure responded on valve body A49 inner chamber and sense hole and mate, pressure sensor imports sensing spool I A39 inner chamber into and enters ultralow pressure by pressure guide hole and senses hole from the pressure communication channel A51 induction valve body A49, form ultralow pressure Inductance valve, in order to set up the super decompression setting value of described pilot valve within the scope of ultralow pressure.In this embodiment, high-pressure pilot valve 18 or the component required for low pressure pilot 19 are identical, and sensing spool I A39 just in sensing valve and sensing spool II 50 installation direction are formed on the contrary and sense different pressures.In this embodiment, described super-pressure sensing hole, middle pressure sensitivity gaging hole and ultralow pressure sensing hole are in fact that the inner chamber of induction valve body A49 is stepped, with sensing spool I A39 with sense spool II 50 Corresponding matching and form detection to different pressures.
In this embodiment, form by the installation site changing sensing spool II 50 pilot valve be suitable in different pressures situation, the range of application of this pilot valve is expanded, and the working method of this pilot valve is for blocking-releasing or on-off simultaneously, improves setting accuracy.
Specifically:
Said structure chooses medium runner hole A40 or medium runner hole B41 as controlled pressure import, when medium runner hole C42 exports as controlled pressure, the working method of this pilot valve is for blocking-releasing, block-release: when the pressure sensor of induction pressure entrance (i.e. pressure communication channel A51) exceed or lower than the setting value of this pilot valve after, this pilot valve will block the pressure of import (medium runner hole A40 or medium runner hole B41) immediately, to be released by medium runner hole B41 or medium runner hole A40 the pressure of medium runner hole C42 simultaneously, thus make well head safe control system make closing motion immediately.This pilot valve chooses medium runner hole A40 or medium runner hole B41 as controlled pressure import according to the actual needs of site technique system protection; when medium runner hole A40 is as controlled pressure import; use as high-pressure pilot valve; when medium runner hole B41 is as controlled pressure import, use as low pressure pilot.
Said structure chooses medium runner hole C42 as controlled pressure import, shielding medium runner hole A40 or medium runner hole B41, the working method of this pilot valve is on-off, on-off: when the pressure sensor of induction pressure entrance (i.e. pressure communication channel A51) exceed or lower than the setting value of this pilot valve after, this pilot valve by the pressure of the medium runner hole C42 that released by medium runner hole B41 or medium runner hole A40 immediately, thus makes well head safe control system make closing motion immediately.This pilot valve chooses medium runner hole A40 according to the actual needs of site technique system protection or medium runner hole B41 shields mouth as controlled pressure; when medium runner hole A40 is as controlled pressure shielding mouth; use as high-pressure pilot valve; when medium runner hole B41 is as controlled pressure shielding mouth, use as low pressure pilot.
For the super decompression setting value that convenient adjustment matches with the adjusting range of the Inductance valve of sensing spool II different installation and super o-volt protection pressure required for actual process system is corresponding; above-described embodiment; preferably: described valve A 33 is threaded with between adjusting screw(rod) A36, regulated by the spinning in and out of adjusting screw(rod) A36 required for super decompression setting value.
Install during for ease of using, above-described embodiment, preferably: the right-hand member outer wall of described valve A 33 is provided with the hold-down nut A47 be connected with well head safe control system equipment.
For ease of ensureing the stability of set force value, above-described embodiment, preferably: described valve A 33 is threaded with between adjusting screw(rod) A36, is outside equipped with locking nut A53 at adjusting screw(rod) A36.
For improving rate-of flow, above-described embodiment, preferably: described valve pocket A35 outer wall is provided with the annular groove D48 that at least one increases gap between valve pocket A35 and valve pocket A34.
By adopting above-mentioned high-pressure pilot valve 18 and low pressure pilot 19, improve pilot valve pressure setting precision, improve pilot valve response speed, expand range of application and increase pilot valve range of set value, the reaction speed of whole pneumatic well head safe control system is hastened, improves the safety of whole pneumatic well head safe control system.
See accompanying drawing 6, above-described embodiment, preferably: described two position three-way valve 28 comprises valve B 54, is provided with spool B55 at the inner chamber of valve B 54, and left end is provided with valve gap B57; Spring B 56 is had at the left section of cover of spool B55, spool B55 is positioned at the left end of valve B 54 under the effect of spring B 56 spring B power, valve B 54 is provided with medium runner hole A I 58, medium runner hole B I 59 and medium runner hole C I 60, valve gap B57 is provided with medium runner hole D I 61;
Described medium runner hole A I 58 and medium runner hole B I 59 is positioned at the same sidewall on valve B 54, and medium runner hole C I 60 is positioned on the sidewall relative with sidewall residing for medium runner hole A I 58 and medium runner hole B I 59;
The inner chamber of described valve B 54 is through hole, this through hole is by spool B55 shutoff, an increase valve pocket B64 is provided with at the inner chamber left end of valve B 54, increasing valve core head B65 is arranged in this increase valve pocket B64, described spring B 56 left end is tight against on increase valve core head B65, and spring B 56 right-hand member is tight against on the internal chamber wall increasing valve pocket B64.
Specifically:
Said structure chooses medium runner hole A I 58 as pressure inlets, when medium runner hole C I 60 is as pressure export, the working method of this pilot valve is for often to open two position three-way valve, often open two position three-way valve: when controlled pressure entrance (i.e. medium runner hole D I 61) reach opening pressure after, promotion spool moves right by controlled pressure, spool will block the pressure of import (medium runner hole A I 58) immediately, to be released by medium runner hole B I 59 pressure of medium runner hole C I 60 simultaneously, thus make well head safe control system make closing motion immediately.
Said structure chooses medium runner hole B I 59 as controlled pressure import, when medium runner hole C I 60 is as pressure export, the working method of this pilot valve is normally closed two position three-way valve, normally closed two position three-way valve: after the opening pressure release of controlled pressure entrance (i.e. medium runner hole D I 61), spool by under the effect of spring B power to left movement, spool will block the pressure of import (medium runner hole B I 59) immediately, to be released by medium runner hole A I 58 pressure of medium runner hole C I 60 simultaneously, thus make well head safe control system make closing motion immediately.
During for ease of using and the installation of well head safe control system equipment, above-described embodiment, preferably: the right-hand member of described valve B 54 is provided with the screwed hole B62 be connected with well head safe control system equipment
For increasing rate-of flow, above-described embodiment, preferably: described spool B55 outer wall is provided with the annular groove E I 63 that at least one increases gap between spool B55 and valve B 54.
See accompanying drawing 7, above-described embodiment, preferably: described relay valve 4 comprises valve body C73, at the inner chamber of valve body C73, spool C72 is installed, left end is provided with valve gap C66, has spring C I 71, at the right-hand member of valve body C73, handle ball 81 and locking nut C80 are housed at the left section of cover of spool C72;
Described valve gap C66 is disposed with from left to right medium runner hole D II 67 and sealed aperture 68;
Described valve body C73 is provided with medium runner hole A II 74, medium runner hole B II 85 and medium runner hole C II 83, described medium runner hole B II 85 and medium runner hole C II 83 is positioned at the same sidewall on valve body C73, medium runner hole A II 74 is positioned on the sidewall relative with sidewall residing for medium runner hole B II 85 and medium runner hole C II 83, and the through hole that medium runner hole A II 74 is relative is provided with annular groove F II 84;
The inner chamber of described valve body C73 is a through hole, be provided with at the inner chamber left end of valve body C73 and increase valve pocket C70, the left end increasing valve pocket C70 is provided with chute 69, the sidewall of valve body C73 being positioned at medium runner hole A II 74 right-hand member is provided with pintle hook lock installing hole, pintle hook lock installing hole internal thread is connected with pintle hook lock nut 78, be provided with pintle hook lock pin 77 in this pintle hook lock nut 78, spring C II 79 is tight against in pintle hook lock installing hole by the bottom of described pintle hook lock pin 77; The annular groove G II 82 inserted for pintle hook lock pin 77 is provided with at spool C72 right-hand member;
The left end of described valve body C73 is provided with the large piston C86 mated with the increase valve pocket C70 of spool C72, and described spring C I 71 left end is tight against on this large piston C86 right side, and spring C I 71 right-hand member is tight against on the inwall increasing valve pocket C70; The valve piston C87 mated with sealed aperture 68 is provided with at the left end of large piston C86.
Specifically:
Said structure chooses medium runner hole B II 85 as pressure inlets, medium runner hole A II 74 is as pressure export, pull handle ball 81 to the right and press pintle hook lock pin 77, the manual locking of this valve, pressure is entered by medium runner hole B II 85 and exports from medium runner hole A II 74, moved right by promotion spool C72 after the controlled pressure that medium runner hole D II 67 enters large piston C86 left end in valve pocket reaches opening pressure and put in place, pintle hook lock pin 77 is by automatic spring, and this valve is opened completely.
When driving handle ball 81 left, spool C72 will block the pressure of medium runner hole B II 85 immediately, and the pressure of medium runner hole A II 74 end of being released by medium runner hole C II 83, realize the manual-lock of this valve.
When the pressure of medium runner hole D II 67 is reduced to below the controlled pressure of this valve, spool C72 by under the elastic force of spring C I 71 to left movement, spool C72 will block the pressure of medium runner hole B II 85 immediately, and the pressure of medium runner hole A II 74 end of being released by medium runner hole C II 83, realize the automatic closedown of this valve.
For ease of installing this valve, above-described embodiment, preferably: on the valve body C73 between pintle hook lock pin 77 and medium runner hole A II 74, be provided with erecting of panel nut 76.Erecting of panel nut 76 described in this embodiment achieves the agility be connected when installing with well head safe control system equipment.
For increasing rate-of flow, above-described embodiment, preferably: described spool C72 outer wall is provided with the annular groove E II 75 in gap between at least one spool C72 and valve body C73 inner chamber.
In above-mentioned high-pressure pilot valve 18, low pressure pilot 19, relay valve 4 or two position three-way valve 28, needing the position of sealing to adopt sealing ring sealing.
Pneumatic well head safe control system of the present invention compared with prior art has following good effect:
1. adopt the instrument such as inert gas or the compressed air wind such as nitrogen as power can not produce blast hidden danger, effectively solve the problem that system is explosion-proof, floss hole also can not cause natural gas or hydraulic oil pollution to environment, corrosion can not be caused to system simultaneously, improve the feature of environmental protection of system, sealing and application life.
2. adopt pneumatic control mode, trafficability performance is strong, and the open and close of system are very fast, can close well head within the shortest time, ensures the safety of well head and backend process system.
3. adopt relay valve as switch, the open and close of push/pull relay valve and feasible system, compare traditional manual pump or the pressurization of gas drive pump, alleviate labour intensity greatly or reduce complexity, improve override.
4. possess that superpressure is blocked automatically, the automatic block valve of decompression, the automatic break-in facility of fire, meet API standard, possess remote automation simultaneously and block, long-range valve position feedback function, make systemic-function more complete, integrality is higher.
5. adopt series and parallel connections two kinds of control principles, can adapt to different work condition environments, range of application more comprehensively.
6. adopt coming into operation and masked state of tee ball valve Controlling solenoid valve, effectively raise continuity and the independence of system cloud gray model.
7. adopt bleed pressure as the operating pressure of pneumatic block valve, the post-decompression pressure of pressure regulator valve is as the controlled pressure of system, and control logic is simple and direct, safe and reliable to operation.
In sum, native system control logic is simple and direct, power source safety and environmental protection, respond fast and reliable, improves sealing, safety, continuity, handling and application life, also make that the function of system is more complete simultaneously, range of application more comprehensively.
Claims (10)
1. a pneumatic well head safe control system, comprises control panel (1), high-pressure pilot valve (18), low pressure pilot (19), fusible plug (17) and pneumatic block valve (25); It is characterized in that:
Described control panel (1) comprises again straight-through valve (3), and the entrance of this straight-through valve (3) is connected to the outlet of gas source interface (2), and the outlet of straight-through valve (3) is connected to the import of relay valve (4); The outlet of described relay valve (4) is connected to point two-way after the import of unloader (5), one road is connected to the import of SSV interface (7), pressure meter I (6) is provided with between SSV interface (7) and unloader (5), an other road connects the import of pressure regulator valve (8), needle valve (9), high-pressure pilot valve import interface (10) successively, and between needle valve (9) and high-pressure pilot valve import interface (10), the import of fusible plug interface (11) is received on a point road; The back pressure interface of described relay valve (4) receives the outlet of tee ball valve (13), pressure meter II (15) is provided with between this tee ball valve (13) and relay valve (4), the outlet of electromagnetic valve (12) is received in an import of described tee ball valve (13), is connected after the import of electromagnetic valve (12) is received in another import of tee ball valve (13) with the outlet of low pressure pilot discharge coupling (14); The import of discharge protector (16) received by described relay valve (4), electromagnetic valve (12) after being communicated with the evacuation port of unloader (5);
Described high-pressure pilot valve (18) and the outlet of the high-pressure pilot valve import interface (10) on control panel (1) are serially connected with low pressure pilot (19) after connecting, the outlet of this high-pressure pilot valve (18) is connected to the import of low pressure pilot (19), and the outlet of low pressure pilot (19) is connected to the import of the low pressure pilot discharge coupling (14) on control panel (1); Described high-pressure pilot valve (18) and low pressure pilot (19) are installed in and converge on tracheae (20), the import of this remittance tracheae (20) is connected to the outlet of impulse test stop valve I (22), remittance tracheae (20) and impulse are tested between stop valve I (22) and are provided with pressure meter III (21), and the import of impulse test stop valve I (22) is connected on the super decompression sensing point on site plant or pipeline;
Described fusible plug (17) is arranged on well head region, and the import of fusible plug (17) is connected to the outlet of the fusible plug interface (11) on control panel (1);
Described pneumatic block valve (25) is arranged on the rear end of the production gate valve of well head christmas tree, this pneumatic block valve (25) is provided with QRV Quick Release Valve (23) and valve position feedback device (24), the import of QRV Quick Release Valve (23) is connected to the outlet of the SSV interface (7) on control panel (1), and the outlet of QRV Quick Release Valve (23) is connected to the import of pneumatic block valve (25);
Described electromagnetic valve (12) is all connected with the automation control system with RTU or PLC control strip with valve position feedback device (24), by the keying of automation control system Controlling solenoid valve (12) and the on off state of supervision valve position feedback device (24);
During use, gas source interface (2) and source of the gas are connected.
2. a pneumatic well head safe control system, comprises control panel (1), high-pressure pilot valve (18), low pressure pilot (19), fusible plug (17) and pneumatic block valve (25); It is characterized in that:
Described control panel (1) comprises again straight-through valve (3), and the entrance of this straight-through valve (3) is connected to the outlet of gas source interface (2), and the outlet of straight-through valve (3) is connected to the import of relay valve (4), the outlet of relay valve (4) is connected to point two-way after the import of unloader (5), one road is connected to the import of SSV interface (7), be provided with pressure meter I (6) between SSV interface (7) and unloader (5), an other road connects the import of pressure regulator valve (8), needle valve (9), high-pressure pilot valve import interface (10) successively, bifurcation road again between described needle valve (9) and high-pressure pilot valve import interface (10), the import of low pressure pilot import interface (26) received by a branch road, and the import of fusible plug interface (11) received by another branch road, the back pressure interface of described relay valve (4) receives the outlet of two position three-way valve (28), pressure meter II (15) is set between this two position three-way valve (28) and relay valve (4), the import of two position three-way valve (28) is connected to the outlet of tee ball valve (13), the back pressure interface of two position three-way valve (28) is connected to the outlet of low pressure pilot discharge coupling (14), the outlet of electromagnetic valve (12) is received in an import of tee ball valve (13), the outlet of high-pressure pilot valve discharge coupling (27) is received again after the import of electromagnetic valve (12) is received in another import of tee ball valve (13), described relay valve (4), electromagnetic valve (12), two position three-way valve (28) receive the import of discharge protector (16) after being communicated with the evacuation port of unloader (5),
Described high-pressure pilot valve (18) is arranged on impulse test stop valve V (31), pressure meter V (32) is provided with between this impulse test stop valve V (31) and high-pressure pilot valve (18), the import of impulse test stop valve V (31) is connected on the superpressure sensing point on site plant or pipeline, the import of high-pressure pilot valve (18) is connected to the outlet of the high-pressure pilot valve import interface (10) on control panel (1), and the outlet of high-pressure pilot valve (18) is connected to the import of the high-pressure pilot valve discharge coupling (27) on control panel (1);
Described low pressure pilot (19) is arranged on impulse test stop valve II (30), pressure meter IV (29) is provided with between this impulse test stop valve II (30) and low pressure pilot (19), the import of impulse test stop valve II (30) is connected on the decompression sensing point on site plant or pipeline, the import of low pressure pilot (19) is connected to the outlet of the low pressure pilot import interface (26) on control panel (1), and the outlet of low pressure pilot (19) is connected to the import of the low pressure pilot discharge coupling (14) on control panel (1);
Described fusible plug (17) is arranged on well head region, and the import of fusible plug (17) is connected to the outlet of the fusible plug interface (11) on control panel (1);
Described pneumatic block valve (25) is arranged on the rear end of the production gate valve of well head christmas tree, this pneumatic block valve (25) is provided with QRV Quick Release Valve (23) and valve position feedback device (24), the import of QRV Quick Release Valve (23) is connected to the outlet of the SSV interface (7) on control panel (1), and the outlet of QRV Quick Release Valve (23) is connected to the import of pneumatic block valve (25);
Described electromagnetic valve (12) is all connected with the automation control system with RTU or PLC control strip with valve position feedback device (24), by the keying of automation control system Controlling solenoid valve (12) and the on off state of supervision valve position feedback device (24);
During use, gas source interface (2) and source of the gas are connected.
3. pneumatic well head safe control system according to claim 1 and 2, it is characterized in that: described high-pressure pilot valve (18) or low pressure pilot (19) comprise valve A (33), be fixed with valve pocket A(34 at left section of the inner chamber of valve A (33)), valve pocket A(34) in spool A(35 is installed); Adjusting screw(rod) A(36 is fixed with) at right section of the inner chamber of valve A (33), adjusting screw(rod) A(36) and spool A(35) between be provided with spring conductor rod A(37), spring conductor rod A(37) right-hand member stretches into adjusting screw(rod) A(36) in, spring conductor rod A(37) and adjusting screw(rod) A(36) between spring conductor rod A(37) bar section on cover have spring A(38), spring conductor rod A(37) left end be tight against at spool A(35) right-hand member; The left end of described valve A (33) is fixed with Inductance valve, spool A(35) left end be tight against sense spool A right-hand member at this Inductance valve;
Valve pocket A(34 is being installed) valve A (33) at place is provided with medium runner hole A(40), medium runner hole B(41) and medium runner hole C(42), described medium runner hole A(40) and medium runner hole B(41) be positioned at same sidewall on valve A (33), medium runner hole C(42) be positioned at and medium runner hole A(40) and medium runner hole B(41) on the relative sidewall of residing sidewall;
Described valve pocket A(34) on be provided with and medium runner hole A(40), medium runner hole B(41) and medium runner hole C(42) the annular groove A(43 of Corresponding matching), annular groove B(44) and annular groove C(45), at annular groove A(43), annular groove B(44) and annular groove C(45) on be provided with through hole A(46), by through hole A(46) realize medium runner hole C(42) with medium runner hole A(40) conducting or matter runner hole C(42) and with medium runner hole B(41) conducting;
Described valve pocket A(34) annular groove A(43), annular groove B(44) and annular groove C(45) all sealed by O RunddichtringO between both sides place and valve A (33);
The Inductance valve of described high-pressure pilot valve (18) comprises induction valve body A(49), be arranged on induction valve body A(49) sensing spool I A(39 of right section of inner chamber), with sensing spool I A(39) pressure guide hole that communicates of inner chamber, sensing spool I A(39) with respond to valve body A(49) between sealed by O RunddichtringO, spool A(35) left end be tight against at this sensing spool I A(39) right-hand member, at induction valve body A(49) inner chamber is provided with super-pressure sensing hole, middle pressure sensitivity gaging hole and ultralow pressure sensing hole, described super-pressure sensing hole, middle pressure sensitivity gaging hole F and ultralow pressure sensing hole are stepped, be arranged on sensing spool I A(39) sensing spool II (50) in inner chamber, the left end of sensing spool II (50) stretches out sensing spool I A(39) after inner chamber be positioned at respond to valve body A(49) super-pressure on inner chamber senses hole and mates, sensing spool II (50) is spacing by the positive stop lug boss be positioned in the middle part of it, sensing spool II (50) with respond to valve body A(49) between sealed by O RunddichtringO, pressure sensor is from induction valve body A(49) pressure communication channel A(51) in enter super-pressure sensing hole, form super-pressure Inductance valve, in order to set up the super decompression setting value of described pilot valve within the scope of super-pressure,
The Inductance valve of described low pressure pilot (19) comprises induction valve body A(49), be arranged on induction valve body A(49) sensing spool I A(39 of right section of inner chamber), with sensing spool I A(39) pressure guide hole that communicates of inner chamber, sensing spool I A(39) with respond to valve body A(49) between sealed by O RunddichtringO, spool A(35) left end be tight against right-hand member at this sensing spool II (50), at induction valve body A(49) inner chamber is provided with super-pressure sensing hole E(22), middle pressure sensitivity gaging hole F(23) and ultralow pressure sensing hole G(24), described super-pressure sensing hole E(22), middle pressure sensitivity gaging hole F(23) and ultralow pressure sense hole G(24) stepped, be arranged on sensing spool I A(39) sensing spool II (50) in inner chamber will sense spool I A(39) shutoff of inner chamber right-hand member, sensing spool II (50) is spacing by the positive stop lug boss be positioned in the middle part of it, sensing spool II (50) with sense spool I A(39) between sealed by O RunddichtringO, sensing spool I A(39) right-hand member be positioned at respond to valve body A(49) ultralow pressure on inner chamber senses hole G(24) mate, pressure sensor is from induction valve body A(49) pressure communication channel A(51) in import sensing spool I A(39 into) inner chamber and enter ultralow pressure by pressure guide hole and sense hole G(24), form ultralow pressure Inductance valve, in order to set up the super decompression setting value of described pilot valve within the scope of ultralow pressure.
4. pneumatic well head safe control system according to claim 3, is characterized in that: described valve A (33) and adjusting screw(rod) A(36) between be threaded, at adjusting screw(rod) A(36) be outside equipped with locking nut A(53).
5. pneumatic well head safe control system according to claim 3, is characterized in that: the right-hand member outer wall of described valve A (33) is provided with the hold-down nut A(47 be connected with well head safe control system equipment).
6. pneumatic well head safe control system according to claim 3, is characterized in that: described spool A(35) outer wall is provided with at least one and increases spool A(35) and valve pocket A(34) between the annular groove D(48 in gap).
7. pneumatic well head safe control system according to claim 2, is characterized in that: described two position three-way valve (28) comprises valve B (54), is provided with spool B(55 at the inner chamber of valve B (54)), left end is provided with valve gap B(57); At spool B(55) left section of cover have spring B (56), spool B(55) under the effect of spring B (56) spring B power, be positioned at the left end of valve B (54), valve B (54) is provided with medium runner hole A I (58), medium runner hole B I (59) and medium runner hole C I (60), at valve gap B(57) on be provided with medium runner hole D I (61);
Described medium runner hole A I (58) and medium runner hole B I (59) is positioned at the same sidewall on valve B (54), and medium runner hole C I (60) is positioned on the sidewall relative with the residing sidewall of medium runner hole B I (59) with medium runner hole A I (58);
The inner chamber of described valve B (54) is through hole, this through hole is by spool B(55) shutoff, an increase valve pocket B(64 is provided with) at the inner chamber left end of valve B (54), increase valve core head B(65) be arranged on this increase valve pocket B(64) in, described spring B (56) left end is tight against at increase valve core head B(65) on, spring B (56) right-hand member is tight against and is increasing valve pocket B(64) internal chamber wall on.
8. pneumatic well head safe control system according to claim 7, is characterized in that: described spool B(55) outer wall is provided with at least one and increases spool B(55) and valve B (54) between the annular groove E I (63) in gap.
9. pneumatic well head safe control system according to claim 1 and 2, it is characterized in that: described relay valve (4) comprises valve body C(73), at valve body C(73) inner chamber spool C(72 is installed), left end is provided with valve gap C(66), at spool C(72) left section of cover have spring C I (71), at valve body C(73) right-hand member handle ball (81) and locking nut C(80 are housed);
Described valve gap C(66) on be disposed with medium runner hole D II (67) and sealed aperture (68) from left to right;
Described valve body C(73) on be provided with medium runner hole A II (74), medium runner hole B II (85) and medium runner hole C II (83), described medium runner hole B II (85) and medium runner hole C II (83) is positioned at valve body C(73) on same sidewall, medium runner hole A II (74) is positioned on the sidewall relative with the residing sidewall of medium runner hole C II (83) with medium runner hole B II (85), and the through hole that medium runner hole A II (74) is relative is provided with annular groove F II (84);
Described valve body C(73) inner chamber be a through hole, at valve body C(73) inner chamber left end be provided with increase valve pocket C(70), increasing valve pocket C(70) left end be provided with chute (69), be positioned at the valve body C(73 of medium runner hole A II (74) right-hand member) sidewall on be provided with pintle hook lock installing hole, pintle hook lock installing hole internal thread is connected with pintle hook lock nut (78), be provided with pintle hook lock pin (77) in this pintle hook lock nut (78), spring C II (79) is tight against in pintle hook lock installing hole by the bottom of described pintle hook lock pin (77); At spool C(72) right-hand member is provided with for pintle hook lock pin (77) the annular groove G II (82) that inserts;
Described valve body C(73) left end be provided with and spool C(72) increase valve pocket C(70) the large piston C(86 that mates), described spring C I (71) left end is tight against this large piston C(86) on right side, spring C I (71) right-hand member is tight against on the inwall increasing valve pocket C(70; At large piston C(86) left end be provided with the valve piston C(87 mated with sealed aperture (68)).
10. pneumatic well head safe control system according to claim 9, is characterized in that: be positioned at pintle hook lock pin (77) and medium runner hole A(74) between valve body C(73) on be provided with erecting of panel nut (76); Described spool C(72 outer wall is provided with at least one spool C(72) and valve body C(73) the annular groove E II (75) in gap between inner chamber.
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| CN201310372589.3A CN103410471B (en) | 2013-08-22 | 2013-08-22 | Pneumatic well head safe control system |
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| CN201310372589.3A CN103410471B (en) | 2013-08-22 | 2013-08-22 | Pneumatic well head safe control system |
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|---|---|---|---|---|
| CN104196483B (en) * | 2014-08-26 | 2017-01-11 | 乐山倍创机械制造有限公司 | Pneumatic wellhead shut-off device |
| CN106639950A (en) * | 2015-10-30 | 2017-05-10 | 上海新莲泵阀有限公司 | Well head device with ball valve backpressure function |
| CN108612501A (en) * | 2016-12-09 | 2018-10-02 | 湖北和瑞精密机械制造有限公司 | A kind of well head safe control system control valve |
| CN108457933B (en) * | 2018-04-18 | 2023-11-28 | 西南石油大学 | Shale gas well field safety control system adaptability testing device and method |
| CN109282060A (en) * | 2018-11-27 | 2019-01-29 | 美钻深海能源科技研发（上海）有限公司 | A kind of band enforces the high pressure check valve of handle |
| CN109854205B (en) * | 2019-01-21 | 2021-06-01 | 成都英派尔新能源科技有限公司 | Slow-opening and fast-closing natural gas wellhead integrated control system and control method thereof |
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| CN101078447A (en) * | 2006-05-26 | 2007-11-28 | 宝山钢铁股份有限公司 | Differential pressure self-closing valve |
| CN201162522Y (en) * | 2008-03-10 | 2008-12-10 | 周华安 | Surface safety valve control system for petroleum natural gas extraction and transmission operation |
| CN203531844U (en) * | 2013-08-22 | 2014-04-09 | 重庆达腾科技发展有限公司 | Pneumatic well opening safety control system |
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| CN103410471A (en) | 2013-11-27 |
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