CN207246497U - A kind of natural gas wellhead emergency shutoff device - Google Patents
A kind of natural gas wellhead emergency shutoff device Download PDFInfo
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- CN207246497U CN207246497U CN201721291614.5U CN201721291614U CN207246497U CN 207246497 U CN207246497 U CN 207246497U CN 201721291614 U CN201721291614 U CN 201721291614U CN 207246497 U CN207246497 U CN 207246497U
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Abstract
The utility model discloses a kind of natural gas wellhead emergency shutoff device, including servomechanism, trigger mechanism and valve, trigger mechanism includes explosion needle-like control mechanism and lockable mechanism, explosion needle-like control mechanism includes super pressure control and thanks to two kinds of triggering states of voltage-controlled system, any one triggering state can move lockable mechanism, and lockable mechanism drives servomechanism control valve break-make.The utility model uses explosion pin to have the characteristics that precision is high and fireballing as trigger element.
Description
Technical field
Natural gas wellhead safeguard technology is the utility model is related to, particularly a kind of natural gas wellhead emergency cut-off dress
Put.
Background technology
Well head emergency shutoff device is one of safety guarantee of natural gas wellhead, when well head pressure medium exceedes the height of setting
During limits pressure, well head emergency shutoff device is automatically closed, and prevents upstream device to be destroyed because of pressure overload；When well head medium pressure
When power is less than the lower bound pressure set, well head emergency shutoff device is automatically closed, and prevents system equipment to be destroyed.
For the existing product of in the market mainly using spring as trigger unit, CN201202436Y discloses a kind of natural gas
Well head emergency shutoff device and its automaton, are made of emergency shutoff device and automaton, emergency cut-off dress
Put and pneumatically perform machine including spring piston type pneumatic actuator more than one, a telescopic high pressure cut-off device, more spring piston types
Structure is rigidly connected by stent and shaft coupling with cartridge type high pressure cut-off device；Automaton include Bourdon tube pressure switch,
Single electric control solenoid valve, automatic fitration drain valve, pressure reducing valve, valve group, 24VDC power supplys and flame proof box, wherein, pressure switch is serially connected with
Between 24VDC power supplys and single electric control electromagnetic valve coil, single electric control solenoid valve inlet end is through automatic fitration drain valve, pressure reducing valve, valve
Group connects controlled natural gas；Outlet terminates more spring piston type pneumatic actuators of emergency shutoff device.Exist in the prior art
Following defect：1) precision is low；2) balance is found between medium power and spring force, therefore cut-off velocity is slower；3) it is complicated, into
This height.
The content of the invention
For problems of the prior art, the utility model provides that a kind of cut-off velocity is fast, precision is high, structure is simple
Natural gas wellhead emergency shutoff device single, cost is low.
The purpose of this utility model is achieved through the following technical solutions.
A kind of natural gas wellhead emergency shutoff device, including valve, servomechanism, trigger mechanism, gas-liquid conversion equipment and
Oil supply system, the valve and gas-liquid conversion equipment are installed on pipeline, and the trigger mechanism triggers servomechanism control valve
Break-make, the trigger mechanism includes explosion needle-like control mechanism and lockable mechanism, the explosion needle-like control mechanism respectively with
Oil supply system is connected with gas-liquid conversion equipment, and the explosion needle-like control mechanism includes super pressure control pilot valve and thanks to voltage-controlled system
Pilot valve, the super pressure control pilot valve include super pressure control hydraulic cylinder and super pressure control explosion pin, the super pressure control explosion
Pin is connected with the overhanging piston rod of the super pressure control hydraulic cylinder, when pipeline Fluid pressure raises, the super pressure control hydraulic pressure
Oil pressure of the overhanging piston rod of cylinder in the super pressure control hydraulic cylinder bends the pressure controlled blasting pin unstability of losing under promoting；
It is described to lose voltage-controlled pilot valve processed including losing voltage-controlled hydraulic cylinder processed, losing voltage-controlled spring processed and losing pressure controlled blasting pin, it is described thanks to voltage-controlled
Explosion pin processed is connected with the overhanging piston rod of the super pressure control hydraulic cylinder, described to lose the voltage-controlled spring perception processed thanks to voltage-controlled system
Oil pressure in hydraulic cylinder, when pipeline Fluid pressure is normal, the thanks to voltage-controlled spring processed is in compressed energy-storage state, when pipeline stream
When body pressure persistently reduces, the thanks to voltage-controlled spring processed is discharged by squeezed state, bends the pressure controlled blasting pin unstability of losing, institute
Lockable mechanism triggering and then control valve can be made by stating any one triggering in super pressure control pilot valve and thanks to voltage-controlled pilot valve processed
The break-make of door；Higher air pressure in pipeline is converted to relatively low oil pressure by the gas-liquid conversion equipment, and the oil supply system is
The oil pressure functional component fuel feeding of explosion needle-like control mechanism and gas-liquid conversion equipment.
Further, the lockable mechanism includes two locking pivoted arms and a locking element, described two locking pivoted arms
One end be in contact with servomechanism, the other end of described two locking pivoted arms is in contact with locking element, locking member
Part is connected with the explosion needle-like control mechanism, and is controlled by explosion needle-like control mechanism.
Further, the servomechanism includes babinet, and overhanging piston rod, the overhanging piston rod are equipped with the babinet
On be cased with spring spring be alternatively equipped between one end of overhanging piston rod and babinet, be provided with and pull out on the overhanging piston rod
Mechanism is pitched, the other end of the overhanging piston rod is in contact with one end of two locking pivoted arms, and the locking pivoted arm is used to maintain
The deformed state of spring.
Further, the gas-liquid conversion equipment is piston type gas-liquid conversion equipment or diaphragm type gas-liquid conversion equipment.
Further, the oil supply system includes fuel reserve tank, and the fuel reserve tank is equipped with manual pressure test pump, the fuel reserve tank
Relief valve and check-valves are equipped between explosion needle-like control mechanism.
Compared with the prior art, the utility model has the advantage of：The utility model uses explosion pin as trigger element,
Solve influences precision and in medium power using spring existing for gas well head emergent cut-off valve in the prior art as trigger unit
The problem of balance causes cut-off velocity slower is found between spring force, has the characteristics that precision is high and fireballing.
Brief description of the drawings
Fig. 1 is the normal operating conditions schematic diagram of the utility model.
Fig. 2 is the excess pressure cutout schematic diagram of the utility model.
Fig. 3 is that the crush-cutting that loses of the utility model breaks schematic diagram.
In figure：1- servomechanisms, 2- lockable mechanisms, 3- trigger mechanisms, 4- oil supply systems, 5- gas-liquid conversion equipments, 6- valves
Door, 7- explosion needle-like control mechanisms, 8- lose voltage-controlled pilot valve processed, 9- super pressure control pilot valves, 11- babinets, 12- shifting fork mechanisms,
13- springs, the overhanging piston rods of 14-, 21- locking pivoted arms, 22- locking elements, 31- lose voltage-controlled hydraulic cylinder processed, and it is quick-fried that 32- loses voltage-controlled system
Broken pin, 33- lose voltage-controlled spring processed, 34- super pressure control hydraulic cylinders, 35- super pressure control explosion pins, 41- fuel reserve tanks, and 42- is tried manually
Press pump, 43- check-valves, 44- relief valves.
Embodiment
With reference to Figure of description and specific embodiment, the utility model is described in detail.
As shown in Figure 1, a kind of natural gas wellhead emergency shutoff device, including servomechanism, trigger mechanism and valve, it is described
Valve is installed on pipeline, and the break-make of the trigger mechanism triggering servomechanism control valve, the trigger mechanism includes locking
Mechanism, explosion needle-like control mechanism, lockable mechanism is installed between the servomechanism and explosion needle-like control mechanism, described quick-fried
Broken needle-like control mechanism is connected with oil supply system and gas-liquid conversion equipment, and the gas-liquid conversion equipment is arranged on pipeline, gas
Higher air pressure in pipeline is converted to the relatively low oil pressure of pressure by liquid conversion equipment；Oil supply system is explosion needle-like control mechanism
With the oil pressure functional component fuel feeding of gas-liquid conversion equipment, the lockable mechanism includes two locking pivoted arms and locking element, described
One end of two locking pivoted arms is in contact with servomechanism, the other end and the locking member of described two symmetrically arranged locking pivoted arms
Part is in contact, and the explosion needle-like control mechanism includes losing voltage-controlled pilot valve processed and super pressure control pilot valve, described to lose voltage-controlled system
Pilot valve includes losing voltage-controlled hydraulic cylinder processed, and described lose in voltage-controlled hydraulic cylinder processed is provided with thanks to voltage-controlled piston rod processed, described thanks to voltage-controlled
Upper cover of piston rod processed has thanks to voltage-controlled spring processed, and described one end for losing voltage-controlled piston rod processed connects with losing one end of pressure controlled blasting pin
Connect, the other end for losing voltage-controlled piston rod processed is in contact with locking element, and the super pressure control pilot valve includes super pressure control
Hydraulic cylinder, is provided with super pressure control piston rod in the super pressure control hydraulic cylinder, one end of the super pressure control piston rod with it is super
One end connection of controlled blasting pin is pressed, the other end of the super pressure control piston rod is in contact with locking element.
The servomechanism includes babinet, is equipped with overhanging piston rod in the babinet, the overhanging upper cover of piston rod has bullet
Spring is alternatively equipped with spring between one end of overhanging piston rod and babinet, shifting fork mechanism is provided with the overhanging piston rod,
The other end of the overhanging piston rod is in contact with one end of two locking pivoted arms, and the locking pivoted arm is used for the shape for maintaining spring
Change state.
The gas-liquid conversion equipment is piston type gas-liquid conversion equipment or diaphragm type gas-liquid conversion equipment.
The oil supply system includes fuel reserve tank, and the fuel reserve tank is equipped with manual pressure test pump, the fuel reserve tank and explosion pin
Relief valve and check-valves are equipped between type control mechanism.
Pressure is in normal range (NR), thanks to presses controlled blasting pin and super pressure control explosion pin to be in stable state, thanks to voltage-controlled
Piston rod and super pressure control piston rod processed is symmetrically stablized acts on locking element in the both sides of locking element, two locking pivoted arms
On, and the overhanging piston rod of servomechanism is locked, and then the spring of servomechanism is in compressed energy-storage state, at this time valve
In full open state.
As shown in Fig. 2, when pressure medium is higher than the high limits pressure set, super pressure control explosion pin is under the action of medium power
Unstability is bent, and super pressure control pilot valve acts, and super pressure control piston rod drives locking element to be subjected to displacement, and locking pivoted arm loses
The constraint of locking element is gone, and then releases the spring of servomechanism, spring is discharged by squeezed state drives shifting fork mechanism to rotate, into
And be in off state with movable valve by opening switching, realize emergency shutdown function.
As shown in figure 3, when pressure medium is less than the lower bound pressure set, controlled blasting pin is thanks to pressed in thanks to voltage-controlled spring force processed
Under the action of unstability bend, lose voltage-controlled pilot valve processed and act, lose voltage-controlled piston rod processed and drive locking element to be subjected to displacement, lock
Rotation stop arm loses the constraint of locking element, and then releases the spring of servomechanism, and spring is discharged by squeezed state drives shift fork machine
Structure rotates, and then is in off state with movable valve by opening switching, realizes emergency shutdown function.
Claims (5)
1. a kind of natural gas wellhead emergency shutoff device, including valve, servomechanism, trigger mechanism, gas-liquid conversion equipment and confession
Oil system, the valve and gas-liquid conversion equipment are installed on pipeline, the trigger mechanism triggering servomechanism control valve
Break-make, it is characterised in that the trigger mechanism includes explosion needle-like control mechanism and lockable mechanism, the explosion needle-like control machine
Structure is connected with oil supply system and gas-liquid conversion equipment respectively, the explosion needle-like control mechanism include super pressure control pilot valve and
Thanks to voltage-controlled pilot valve processed, the super pressure control pilot valve include super pressure control hydraulic cylinder and super pressure control explosion pin, the superpressure
Controlled blasting pin is connected with the overhanging piston rod of the super pressure control hydraulic cylinder, when pipeline Fluid pressure raises, the superpressure
Oil pressure of the overhanging piston rod of hydraulic cylinder in the super pressure control hydraulic cylinder is controlled described lose is pressed controlled blasting pin under promoting
Unstability is bent；It is described to lose voltage-controlled pilot valve processed including losing voltage-controlled hydraulic cylinder processed, losing voltage-controlled spring processed and losing pressure controlled blasting pin, institute
Thanks to pressure controlled blasting pin is stated with the overhanging piston rod of the super pressure control hydraulic cylinder to be connected, it is described to lose described in voltage-controlled spring perception processed
Oil pressure in thanks to voltage-controlled hydraulic cylinder processed, when pipeline Fluid pressure is normal, the thanks to voltage-controlled spring processed is in compressed energy-storage state,
When pipeline Fluid pressure persistently reduces, the thanks to voltage-controlled spring processed is discharged by squeezed state, loses the pressure controlled blasting pin that loses
Steady bending, any one triggering in the super pressure control pilot valve and thanks to voltage-controlled pilot valve processed can make lockable mechanism trigger into
And the break-make of control valve；Higher air pressure in pipeline is converted to relatively low oil pressure, the confession by the gas-liquid conversion equipment
Oil system is explosion needle-like control mechanism and the oil pressure functional component fuel feeding of gas-liquid conversion equipment.
A kind of 2. natural gas wellhead emergency shutoff device according to claim 1, it is characterised in that the lockable mechanism bag
Two locking pivoted arms and a locking element are included, one end of described two locking pivoted arms is in contact with servomechanism, and described two
The other end of a locking pivoted arm is in contact with locking element, and the locking element is connected with the explosion needle-like control mechanism, and
Controlled by explosion needle-like control mechanism.
A kind of 3. natural gas wellhead emergency shutoff device according to claim 1 or 2, it is characterised in that the servomechanism
Including babinet, overhanging piston rod is equipped with the babinet, the overhanging upper cover of piston rod has spring alternatively overhanging piston rod
One end and babinet between be equipped with spring, shifting fork mechanism is installed on the overhanging piston rod, the overhanging piston rod it is another
End is in contact with one end of two locking pivoted arms, and the locking pivoted arm is used for the deformed state for maintaining spring.
A kind of 4. natural gas wellhead emergency shutoff device according to claim 1 or 2, it is characterised in that the gas-liquid conversion
Device is piston type gas-liquid conversion equipment or diaphragm type gas-liquid conversion equipment.
A kind of 5. natural gas wellhead emergency shutoff device according to claim 1 or 2, it is characterised in that the oil supply system
Including fuel reserve tank, the fuel reserve tank is equipped with manual pressure test pump, is equipped with and lets out between the fuel reserve tank and explosion needle-like control mechanism
Pressure valve and check-valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721291614.5U CN207246497U (en) | 2017-09-30 | 2017-09-30 | A kind of natural gas wellhead emergency shutoff device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721291614.5U CN207246497U (en) | 2017-09-30 | 2017-09-30 | A kind of natural gas wellhead emergency shutoff device |
Publications (1)
| Publication Number | Publication Date |
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| CN207246497U true CN207246497U (en) | 2018-04-17 |
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ID=61890906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721291614.5U Active CN207246497U (en) | 2017-09-30 | 2017-09-30 | A kind of natural gas wellhead emergency shutoff device |
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| CN (1) | CN207246497U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107504234A (en) * | 2017-09-30 | 2017-12-22 | 江苏瑞朗博机械设备有限公司 | A kind of natural gas wellhead emergency shutoff device |
| NL2023595A (en) * | 2018-08-03 | 2020-02-10 | Jiangsu Reliable Mech Equipment Co Ltd | Valve system with isolation device |
| CN112032398A (en) * | 2020-07-07 | 2020-12-04 | 美钻石油钻采系统(上海)有限公司 | Mechanical automatic control device of stop valve |
-
2017
- 2017-09-30 CN CN201721291614.5U patent/CN207246497U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107504234A (en) * | 2017-09-30 | 2017-12-22 | 江苏瑞朗博机械设备有限公司 | A kind of natural gas wellhead emergency shutoff device |
| NL2023595A (en) * | 2018-08-03 | 2020-02-10 | Jiangsu Reliable Mech Equipment Co Ltd | Valve system with isolation device |
| RU2718945C1 (en) * | 2018-08-03 | 2020-04-15 | Цзянсу Релайбл Меканикал Эквипмент Ко., Лтд | System of valves with insulating device |
| CN112032398A (en) * | 2020-07-07 | 2020-12-04 | 美钻石油钻采系统(上海)有限公司 | Mechanical automatic control device of stop valve |
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