CN106090359A - A kind of natural gas line pressure adjusting part - Google Patents

Abstract

The invention discloses a kind of natural gas line pressure adjusting part, including stop valve and pressure regulator, and connect pressure regulation leading portion and the valve port of pressure regulation back segment, the spool connection of cutting off of stop valve has the lockable mechanism unlocked by gaseous-pressure after pressure regulation, and cut-out spool is formed closure pressure by cutting off driving spring；Pressure regulator is provided with by the main valve plug of a self-balance structure driving, and main valve plug is the most movably located on the housing of pressure regulator；Described main valve plug lower end connects the auxiliary valve core assembly having secondary self-balancing, and auxiliary valve core assembly includes that urceolus, inner core, inner core lower surface are provided with leather bag, and the middle part of inner core is equipped with T-shaped auxiliary valve core, and T-shaped auxiliary valve core upper end abuts with described main valve plug；T-shaped auxiliary valve core forms secondary self-balance structure by leather bag and compression spring.The invention has the beneficial effects as follows, pressure regulator forms the dual self-balancing pressure adjusting structure being overlapped mutually；Stop valve is purely mechanic structure, the potential safety hazard that no-spark is brought.

Description

A kind of natural gas line pressure adjusting part

Technical field

Patent of the present invention relates to a kind of pressure adjusting part, particularly a kind of natural gas line pressure adjusting part.

Background technology

Pressure adjusting part generally comprises and stop valve and pressure regulator, and stop valve turns off for fluid medium, pressure regulator Being the adjustment mechanism for valve of a kind of regulated fluid pressure, pressure regulator generally uses the adjustment to valve port flow area size to control stream Body flow, it is achieved the purpose that pressure adjusts.Existing stop valve generally uses pressure switch to be actuated for stop valve controlling, profit Open by electromagnetic force, there is electrical equipment and produce pyrophoric potential safety hazard.Existing pressure regulator changes the mode of flow area size Being to change spool to realize to the distance between valve port, the spool of existing pressure regulator drives spool to move realization distance by pressure regulating device Change.The pressure regulation drive mechanism of this pressure regulator generally uses self-balance structure, by spring and the film that driven by pressure medium Sheet realizes self-balancing, and as the pressure increases, diaphragm overcomes spring pressure to make spool move to the direction near valve port；Work as pressure drop Time low, spring overcoming diaphragm resistance, make spool move away from valve port direction, be so repeated several times and reach the purpose that pressure adjusts. For the purpose of raising regulation precision, the spool design of execution component is to have the knot of self-balancing by those skilled in the art Structure, to reach to put forward high-precision purpose by Secondary Control.Building as disclosed in China Patent Publication No. CN201149112Y Pressure regulator gas balance stabilizing valve core.This spool promotes spool to change valve core head and valve port by the way of moving by leather bag, spring Distance, and utilize in the middle part of valve core head the pressure reduction of pressure after close to pressure before pressure regulation and valve core head edge part close to pressure regulation, it is achieved The pressure regulation purpose of secondary balancing, owing to this pressure reduction increases along with the increase of valve port inlet pressure, therefore when inlet pressure changes, Balance valve core is correspondingly formed pressure controlled equilibrium process.But the leather bag of this spool is pushed away by the pressed gas in annular chamber Moving mobile and formed secondary self-balance structure by spring reset, toroidal cavity therein is ledge structure, leather bag promoting valve The bearing area startup stage that core moving is less than the bearing area starting the back balance stage.At leather bag by less loaded area pressurized After overcoming spring power to make a core move, at once entering the state that loaded area increases, spool mobile range significantly increases, Easily causing pressure regulation excessive, the direction then being overcome leather bag thrust to promote spool to raise towards pressure after pressure regulation by spring power is moved Dynamic, and make leather bag return to the state that bearing area is little.Pressure after pressure regulation raises, and is again introduced into the pressure regulation process that pressure reduces, Secondary balancing state is can be only achieved after the most repeated multiple times.Therefore, less than the bearing area of normal pressure regulation state during startup, inevitable Cause secondary balancing spool to start pressure change insensitive, and pressure balanced spool moves back and forth often, secondary balancing Time is long, and regulation precision is difficult to meet design requirement.For this reason, it may be necessary to improve further.

Summary of the invention

The purpose of the present invention is aiming at the deficiencies in the prior art, it is provided that a kind of natural gas line pressure adjusting part, Including stop valve and pressure regulator, the driving power that stop valve is controlled as startup by gaseous-pressure, and cut off power by energy storage unit The spring of part provides, and to form the stop valve of purely mechanic structure, can effectively eliminate because driven by power mode exists electronic component fire Flower produces link；The execution component of pressure regulator has self-balancing pressure adjusting structure, to form Double regulating laminated structure, shortens pressure and adjusts Time, to obtain rapidly desirable pressure.Its compact conformation, pressure regulation are reliable.

For achieving the above object, the present invention adopts the following technical scheme that.

A kind of natural gas line pressure adjusting part, including connection pressure regulation leading portion and the valve port of pressure regulation back segment, valve port Entrance point and the port of export are respectively equipped with stop valve and pressure regulator, and the cut-out spool of described stop valve connects to be had by gas pressure after pressure regulation Power unlock lockable mechanism, and cut off spool by cut off driving spring is formed block pressure；Described pressure regulator is provided with by once certainly The main valve plug that balanced structure drives, main valve plug is the most movably located on the housing of pressure regulator；Described main valve plug lower end connects to be had The auxiliary valve core assembly of secondary self-balancing

Use the present invention of preceding solution, owing to the entrance point of valve port is provided with stop valve, the stop valve of this stop valve Core connects the lockable mechanism unlocked by gaseous-pressure after pressure regulation, and cut-out spool is formed closure pressure by cutting off driving spring； Therefore, cut off in purely mechanic structure, can effectively eliminate and produce link because driven by power mode exists electronic component spark.Pressure regulator It is provided with the main valve plug driven by self-balancing mechanism and the auxiliary valve core assembly of the secondary self-balancing being connected with main valve plug.Auxiliary valve core Lower end work surface for pressure regulation is located at above valve port, is flowed out by valve port by the distance realization between change and valve port upper surface Rate-of flow, reaches the purpose that pressure adjusts.This natural gas line Double regulating swaging of pressure adjusting part becomes to be overlapped mutually, Pressure regulation stroke is big, and pressure equalization process is short, and voltage regulation result is good, and simple in construction, compact.

Preferably, described auxiliary valve core assembly includes the urceolus being fixed on above valve port, and in urceolus, the removable inner core that is provided with, interior Being compressed by leather bag edge between cylinder lower surface and the interior step of urceolus bottom and be equiped with leather bag, the middle part of inner core is equipped with valve Bar, valve rod and pressure head form dismountable T-shaped auxiliary valve core, and valve rod has the bar segment stretching out described inner core upper end, this extension bar The far-end of section is screwed with baffle ring, is provided with the compression bullet for forming balance with leather bag between this baffle ring and the end face in opposite directions of inner core Spring；Leather bag is sleeved on valve rod by the installing hole being provided with in the middle part of it, is close on the inner face of pressure head outside leather bag；Inner core passes through Being formed with annular closed cavity with valve rod inside leather bag, this annular closed cavity is by running through the mesopore of T-shaped auxiliary valve core lower end With being tightly connected that ft connection, pressure head periphery and urceolus formation are slidably matched；Described annular closed cavity cuts in waiting vertically Face structure；Described valve rod is abutted with the bottom surface of annular closed cavity by the shaft shoulder.

When valve port pressure medium raises and causes the pressure of pressure regulation back segment to be higher than setting value, the pressure medium after pressure regulation leads to The main valve plug that makes crossing a self-balance structure driving moves down, and main valve plug promotes auxiliary valve core to move down；Meanwhile, this valve port pressure medium liter When amplitude that is high and that cause pressure head center and outer main pressure differential to increase is more than setting value, the medium close to inlet pressure passes through mesopore Entering toroidal cavity, medium utilizes pressure differential to promote spool to overcome compression spring elastic force by leather bag, makes spool move down close Pressure regulation valve port, the superposition value of both amounts of moving down constitutes the auxiliary valve core displacement total amount near pressure regulation valve port, reduces and flow into pressure regulation environment Rate-of flow, reduce in the middle part of pressure regulation back segment pressure medium and pressure head and pressure reduction that peripheral part is formed；Medium pressure after pressure regulation After power reduces, what self-balance structure drove makes to retract on main valve plug position, and auxiliary valve core is with retracting position on main valve plug；And it is same with this Time, in the middle part of pressure head and after the pressure reduction reduction of peripheral part formation, auxiliary valve core is also under the compression spring effect of secondary self-balance structure Overcoming leather bag elastic force, make to move on auxiliary valve core, the superposition value of the return amount of the two equally constitutes auxiliary valve core away from pressure regulation valve port Displacement total amount, increases the rate-of flow flowing into pressure regulation environment, increases pressure regulation back segment pressure medium, and makes in the middle part of pressure head and peripheral part The pressure reduction formed increases.When pressure increase reaches setting value, and the pressure reduction formed with peripheral part in the middle part of pressure head reaches to set During value, spool is in the position of poised state, and the pressure medium of pressure regulation back segment keeps constant.Owing to toroidal cavity is axial etc. Cross section structure, therefore, it is sensitive that spool moves startup, and spool moves the change of the pressure difference in the middle part of rear pressure head and between periphery and puts down Surely, the cycle-index moved back and forth is few, and the equilibrium process time is short, and regulation precision is high.Adjust its position by rotating baffle ring, change Compression spring pretightning force, it is achieved the setting of pressure adjusted value.Auxiliary valve core assembly in this pressure regulator assembly is installed solid by urceolus Fixed, pressure regulation performs the auxiliary valve core of component, leather bag, annular closed cavity and compression spring and is both formed in outer barrel, wherein, and secondary valve Core structure in T shape, auxiliary valve core forms the self-balancing of axial location by compression spring and leather bag.There is this auxiliary valve core assembly Pressure regulator has Double regulating pressure function, and pressure regulation stroke is big, and pressure regulation process is short, and regulation precision is high.

Preferably, described inner core is the most movably installed in urceolus, and inner core is by the hollow form pressure being screwed on urceolus Tight plug screw is fixed, and the hollow part of plug screw constitutes described baffle ring and the installing space of spring；Suit institute it is formed with on described inner core State the bulge loop of compression spring；Urceolus upper end is formed with mounting flange dish.Fix to be supported by ring flange to carry out installing, improve The stability installed, and baffle ring and spring form internals, further cramped construction, adapts to the limited place of installing space；Bullet It is firm that spring is installed, and work process is stable, pressure regulation agility, predictable good.

Preferably, described pressure head is sleeved on described valve rod, and pressure head coordinates face to be sealed by O with the suit of valve rod； Described pressure head is T-shaped, and pressure head is adjacent to described leather bag by the small end end face of T-shaped, and the outside of leather bag is provided with end cap, and this end cap abuts On the shaft shoulder of described location, end cap has the flange of the T-shaped small end peripheral part being fastened on pressure head, so that described leather bag is to pressure head T-shaped small end periphery forms parcel；Pressure head is become axially location with end cap by the locating shaft shoulder on valve rod by leather bag, and passes through spiral shell The end cap being combined in valve rod compresses, and this end cap is positioned at the installation counterbore that pressure head is provided with；Described mesopore includes the pressure head being interconnected Through hole and stem through-hole, pressure head through hole axially penetrates through pressure head, and stem through-hole is made up of the axial direction part being interconnected and radial section, axle Being located on valve rod to section, and connect with pressure head through hole in valve rod lower end, radial section is located on the shaft shoulder of location, radial section and described ring Shape closed cavity connects.The reliable demountable structure so that pressure head and valve rod form a fixed connection, reduces manufacture difficulty, and in pressure Head is internally formed the passage connected with annular closed cavity, further ensures that compact conformation, improves the adaptability of installing space.Separately Outward, the medium channel path that mesopore is constituted is short, easy to process, reduces manufacture difficulty and manufacturing cost.Further, end cap can improve skin Capsule and the bonding strength of valve rod, and by end cap, leather bag is formed protection, eliminate in leather bag motor process and damaged by inner sleeve, prolongation Leather bag service life；Certainly, end cap also contributes to the sealing that leather bag is connected with valve rod.

Preferably, a described self-balance structure includes lever, drive rod, main leather bag, master tray and main spring；Master tray Being fitted in the upper side of described main leather bag, lever is hinged on the housing by middle part, and lever one end is provided with elongated slot, joins in elongated slot Closing has the bearing pin being fixedly connected on described main valve plug upper end, the lever other end to be movably connected in described drive rod lower end, drive rod Through described main leather bag and master tray, and formed a fixed connection with main leather bag and master tray by middle part, main leather bag downside and institute The cavity stating housing formation connects with described pressure regulation back segment；Described master tray is provided with described main spring, and main spring is by screwing togather Main regulation plug screw on the housing compresses.To form the main pressure regulator driving structure of compact conformation, reduction takes up room, and main Voltage regulation function is reliable.

Preferably, described cut-out spool is slidably fitted on cut-out valve body, and described cut-out driving spring is located at cut-out spool And cut off between valve body, cut off driving spring and be used for when described lockable mechanism is in released state, cut off driving spring and rely on Elastic force drives cut-out spool to move, and the fuel gas inlet of valve port is formed closure；Described lockable mechanism includes lock pin, lockpin ventilating Crossing the horizontal interior locking that cut-out spool is formed valve opening state of cannelure being inserted in and cutting off spool, lock pin is respectively provided on two sides with lock Stopping spring and unlock barrier film, locking spring is respectively used to the locking driving mobile with unblock of lock pin with unlocking barrier film；Described unblock Forming diaphragm cavity between barrier film and cut-out valve body, the medium entrance of this diaphragm cavity is connected with described pressure regulation back segment.Due to stop valve It is provided with cut-out driving spring between core and cut-out valve body, when lockable mechanism is in released state, cuts off spool and driven by cut-out The elastic force of spring of moving drives mobile, thus the fuel gas inlet of valve port is formed closure.It is constant that it cuts off closedown power, is not fired Atmospheric pressure size affects, and simple in construction, cuts off reliable.Wherein, lockable mechanism is inserted in the cannelure cutting off spool by horizontal Lock pin formed cutting off the locking that moves of spool, lock pin is respectively by locking spring with unlock barrier film and drive spool locking to conciliate Lock；Unlocking barrier film and cut off formation diaphragm cavity between valve body, the medium entrance of this diaphragm cavity is connected with described pressure regulation back segment.Cause This, when in diaphragm cavity, gaseous-pressure is more than setting value, barrier film is promoted displacement by combustion gas, overcomes the elastic force of locking spring Make the cannelure of lock pin abjection spool, reach to cut off spool and be unlocked and purpose that the blast tube of valve port is closed.To realize Raising, to gaseous-pressure on pressure regulation back segment is abnormal, the cut-out management controlled of transfiniting, its cutting-off controlling directly utilizes pressure regulation back segment internal combustion Atmospheric pressure drives, and reliability is high, is not required to by other instrument and meters, more need not driven by power control, eliminates electrical equipment and opens Movable property lights a fire flower and the fire that brings or the potential safety hazard of blast.

It is further preferred that described lock pin is circular；The cannelure side of described cut-out spool is formed with the cone shaft shoulder, The abutting state that lock pin is tangent with the described cone shaft shoulder is formed the locking cutting off spool, the taper seat of this cone shaft shoulder And the angle α of stop valve wire mandrel is between 75 °～85 °.To facilitate manufacture, reduce manufacturing cost, and in time lock pin or/ In the case of rotating with spool, all can realize reliably locking control；Frustoconical bevel angle parameter directly affects the reliable of locking Property and unlock response speed, the biggest locking of this angle is the most reliable, and angle is the least, unlock corresponding speed the fastest, therefore, reasonably bore The conditions such as face angle needs according to lock pin and spool material, hardness, rough surface group carry out Theoretical Calculation and lot of experiment validation Obtain.Therefore, select rational frustoconical bevel angle, both can ensure that acquisition good reliability and quick, quick unblock performance.

It is further preferred that described lock pin traverses in the middle part of tubular element, the middle part of tubular element is provided with for through institute Perforation is traversed in the bar shaped stating cut-out spool, and lock pin is connected with described cut-out spool by the part being positioned at tubular element pipe；Tubulose The mating holes that component is provided with by the pipe outer wall of lock pin side and described cut-out valve body forms sliding connection, this section of pipeline section Being formed with interior step on endoporus, the endoporus of this section of pipeline section installs described locking spring, and one end of interior step and locking spring is supported Connecing, the other end of locking spring is connected on spring tight plug screw, and spring tight plug screw are screwed on described cut-out valve body；Tubulose Component is positioned at the far-end of lock pin opposite side and is connected with unlocking barrier film；It is fixedly connected with in the middle part of described unblock barrier film at the bottom of the dish type of rigidity Lining；Described cut-out spool is formed closure by front end to the blast tube of described valve port, cuts off spool tail end and exposes described stop valve External body, cuts off spool tail end and is formed with free-hand handgrip.Tubular element and spool form the arrangement of decussation, its Topology layout is compact, and stop valve overall volume is little, install take up room little, it is adaptable to be laid in the narrow and small equipment of installation site or In facility, wherein, the major part of barrier film forms rigid structure, it is simple to the deformation of flexible portion is reliably converted into displacement, carries High control sensitivity；Free-hand handgrip is at pipeline fuel gas shutoff and fix a breakdown, or after gaseous-pressure reduces, free-hand draws Movable valve plug is until by automatic locking.

The invention has the beneficial effects as follows, pressure regulator forms the Double regulating laminated structure being overlapped mutually, and pressure regulation stroke is big, and pressure is put down Weighing apparatus process is short, and voltage regulation result is good, simple in construction, compact；Stop valve is purely mechanic structure, the potential safety hazard that no-spark is brought.

Accompanying drawing explanation

Fig. 1 is the structural representation of the present invention.

Fig. 2 is the structural representation of secondary self-balancing auxiliary valve core assembly in the present invention.

Fig. 3 is the structural representation of stop valve in the present invention.

Detailed description of the invention

The present invention is further illustrated below in conjunction with the accompanying drawings, but the most therefore limits the present invention to described enforcement Among example scope.

Seeing Fig. 1, Fig. 2, Fig. 3, a kind of natural gas line pressure adjusting part, after connection pressure regulation leading portion and pressure regulation The valve port 14 of section, the entrance point of valve port 14 and the port of export be respectively equipped with stop valve and pressure regulator, the cut-out spool of described stop valve 22 connections have the lockable mechanism unlocked by gaseous-pressure after pressure regulation, and cut-out spool 22 is formed closure by cut-out driving spring 23 and presses Power；The port of export of described valve port 14 is provided with pressure regulator, and this pressure regulator is provided with the main valve plug 15 driven by self-balance structure, and one Secondary self-balance structure includes lever 17, drive rod 18, main leather bag 19, master tray 20 and main spring 21, and master tray 20 is fitted in institute State the upper side of main leather bag 19；Lever 17 is hinged on the housing by middle part, and lever 17 one end is provided with elongated slot, coordinates in elongated slot Having the bearing pin 16 being fixedly connected on described main valve plug 15 upper end, lever 17 makes main valve plug 15 move up and down by stirring bearing pin 16, Lever 17 other end is movably connected in described drive rod 18 lower end, and drive rod 18 passes described main leather bag 19 and master tray 20, and Formed a fixed connection with main leather bag 19 and master tray 20 by middle part；This end afterbody of lever 17 stretches into the fluting of drive rod 18 lower end In, this fluting be respectively arranged at two ends with a straight pin 33 up and down, lever 17 is stirred it around hinge by straight pin 33 respectively by both sides Connect axis oscillating；The cavity that main leather bag 19 downside is formed with described housing connects with described pressure regulation back segment；Master tray 20 is fixed It is connected in the upper side of described main leather bag 19, master tray 20 is provided with described main spring 21 by what the engaging of intermediate flange 20a positioned, Main spring 21 is compressed by the main regulation plug screw screwed togather on the housing.Main valve plug 15 is the most movably located at the shell of pressure regulator On body, described main valve plug 15 lower end connects the auxiliary valve core assembly having secondary self-balancing, and auxiliary valve core assembly includes being fixed on valve port 14 The urceolus 1 of top, urceolus 1 upper end is formed with mounting flange dish 1a；Removable in urceolus 1 being provided with inner core 2, inner core 2 only can move Dynamic is installed in urceolus 1, and inner core 2 compresses plug screw 8 by the hollow form being screwed on urceolus 1 and fixes, and compresses plug screw 8 outer end shape Become to turn driving hole 8a, compressed by leather bag 3 edge between the interior step of inner core 2 lower surface and urceolus 1 bottom and be equiped with skin Capsule 3, the middle part of inner core 2 is equipped with valve rod 4, and valve rod 4 and pressure head 5 form dismountable T-shaped spool, and valve rod 4 is joined with inner core 2 Close and be provided with sealing ring 13 between the face of cylinder；Valve rod 4 has the bar segment stretching out described inner core 2 upper end, and this far-end stretching out bar segment screws togather There is baffle ring 6, between this baffle ring 6 and end face in opposite directions of inner core 2, be provided with the compression spring 7 for forming balance with described leather bag 3, This compression spring 7 is set with on inner core 2 on the bulge loop 2a formed, and baffle ring 6 outer end is formed with regulation driving hole 6a；Described leather bag 3 by The installing hole being provided with in the middle part of it is sleeved on valve rod 4, is close on the inner face of pressure head 5 outside leather bag 3；Described inner core 2 passes through Being formed with annular closed cavity with valve rod 4 inside leather bag 3, this annular closed cavity is by running through the mesopore of T-shaped spool lower end With ft connection, between pressure head 5 periphery and described urceolus 1 by sealing ring 5a formed be slidably matched be tightly connected, pressure head 5 times End face is provided with sealing gasket 12；Annular closed cavity is vertically in uiform section structure；Valve rod 4 is empty with annular closed by shaft shoulder 4a The bottom surface in chamber abuts.Wherein, the hollow part of described compression plug screw 8 constitutes described baffle ring 6 and the installing space of compression spring 7.

Wherein, described pressure head 5 is T-shaped, and pressure head 5 is sleeved on described valve rod 4, and pressure head 5 coordinates face to lead to the suit of valve rod 4 Crossing O 9 to seal, pressure head 5 is adjacent to described leather bag 3 by the small end end face of T-shaped, and the outside of leather bag 3 is provided with end cap 11, this end cap 11 are connected on described location shaft shoulder 4a, and end cap 11 has the flange of the T-shaped small end peripheral part being fastened on pressure head 5, so that described Leather bag 3 forms parcel to the T-shaped small end periphery of pressure head 5；Pressure head 5 passes through leather bag 3 and end cap 11 by the location shaft shoulder 4a on valve rod 4 Forming axially location, and compress by being screwed on the end cap 10 of valve rod 4, end cap 10 outer end is formed with inner hexagon spanner hole 10a, should End cap 10 is positioned at the installation counterbore that pressure head 5 is provided with.Wherein, mesopore includes pressure head through hole and the stem through-hole being interconnected, pressure Head through hole axially penetrates through pressure head 5, and stem through-hole is made up of the axial direction part being interconnected and radial section, and axial direction part is located on valve rod 4, And connect with pressure head through hole in valve rod 4 lower end, radial section is located on the shaft shoulder 4a of location, and radial section is with described annular closed cavity even Logical.

Wherein, cut off spool 22 and be slidably fitted on cut-out valve body 24, cut off spool 22 by front end to described valve port 14 Fuel gas inlet forms closure, cuts off spool 22 tail end and exposes cut-out valve body 24 outside, cuts off spool 22 tail end and be formed with socket cap The free-hand handgrip 22b of shape, the free-hand handgrip 22b outer end of cut-out spool 22 is provided with to be screwed on and cuts off preventing on valve body 24 Protecting cover 31；Described cut-out driving spring 23 is located at cut-out spool 22 and cuts off between valve body 24, cuts off driving spring 23 and is used for When described lockable mechanism is in released state, cuts off driving spring 23 and rely on elastic force to drive cut-out spool 22 to move, and to valve The fuel gas inlet of mouth 14 forms closure；Described lockable mechanism includes lock pin 25, and lock pin 25 is by the horizontal ring being inserted in cut-out spool 22 To cutting off spool 22 and formed the locking of valve opening state in shape groove, lock pin 25 be respectively provided on two sides with locking spring 26 and unlock every Film 27, locking spring 26 and unblock barrier film 27 are respectively used to the locking of lock pin 25 and unlock mobile driving；Described unblock barrier film 27 And cutting off and form diaphragm cavity between valve body 24, the medium entrance 24a of this diaphragm cavity connects with described pressure regulation back segment.Wherein, lock pin 25 is circular；The cannelure side cutting off spool 22 is formed with cone shaft shoulder 22a, lock pin 25 and described cone shaft shoulder 22a Formed in tangent abutting state the locking cutting off spool 22, the taper seat of this cone shaft shoulder 22a and cut-out spool 22 axle The angle α of line is between 75 °～85 °.

Wherein, lock pin 25 traverses in the middle part of tubular element 28, and the middle part of tubular element 28 is provided with for through described cut-out Perforation is traversed in the bar shaped of spool 22, and lock pin 25 is connected with described cut-out spool 22 by the part being positioned at tubular element 28 pipe；Pipe The mating holes that shape component 28 is provided with by the pipe outer wall of lock pin 25 side and described cut-out valve body 24 forms sliding connection, should Being formed with interior step on the endoporus of section pipeline section, the endoporus of this section of pipeline section installs described locking spring 26, and interior step and locking bullet One end of spring 26 abuts, and the other end of locking spring 26 is connected on spring tight plug screw 29, and spring tight plug screw 29 are screwed on Cutting off on valve body 24, spring outside being provided with of tight plug screw 29 are screwed on the protection cap 32 cut off on valve body 24, cut off valve body 24 and lead to With spring and tightly plug screw 29 and protection cap 32 screw togather to cross same screw；Tubular element 28 is positioned at far-end and the solution of lock pin 25 opposite side Lock barrier film 27 connects；The dish type end liner 30 of rigidity it is fixedly connected with in the middle part of described unblock barrier film 27.

In the present embodiment, cone shaft shoulder 22a taper seat with cut off spool 22 axis angle α between 78 °～82 ° it Between be optimal.

The preferred embodiment of the present invention described in detail above.Should be appreciated that those of ordinary skill in the art without Need creative work just can make many modifications and variations according to the design of the present invention.Therefore, all technology in the art Personnel are available by logical analysis, reasoning, or a limited experiment the most on the basis of existing technology Technical scheme, all should be in the protection domain being defined in the patent claims.

Claims (8)

1. a natural gas line pressure adjusting part, including connection pressure regulation leading portion and the valve port (14) of pressure regulation back segment, valve port (14) entrance point and the port of export are respectively equipped with stop valve and pressure regulator, and this pressure regulator is provided with by a self-balance structure driving Main valve plug (15), main valve plug (15) is the most movably located on the housing of pressure regulator, it is characterised in that the cut-out of described stop valve Spool (22) connects the lockable mechanism unlocked by gaseous-pressure after pressure regulation, and cuts off spool (22) by cutting off driving spring (23) Form closure pressure；Described main valve plug (15) lower end connects the auxiliary valve core assembly having secondary self-balancing.

Natural gas line pressure adjusting part the most according to claim 1, it is characterised in that described auxiliary valve core assembly bag Include the urceolus (1) being fixed on valve port (14) top, removable in urceolus (1) be provided with inner core (2), inner core (2) lower surface and urceolus (1) being equiped with leather bag (3) by leather bag (3) edge compression between the interior step of bottom, the middle part of inner core (2) is equipped with valve rod (4), valve rod (4) and pressure head (5) form dismountable T-shaped auxiliary valve core, and valve rod (4) has and stretches out described inner core (2) upper end Bar segment, this far-end stretching out bar segment is screwed with baffle ring (6), be provided with between the end face in opposite directions of this baffle ring (6) and inner core (2) for With the compression spring (7) that leather bag (3) forms balance；Leather bag (3) is sleeved on valve rod (4) by the installing hole being provided with in the middle part of it, skin Capsule (3) outside is close on the inner face of pressure head (5)；It is close that inner core (2) is formed with annular by leather bag (3) inner side and valve rod (4) Closing cavity, this annular closed cavity is by running through mesopore and the ft connection of T-shaped auxiliary valve core lower end, and pressure head (5) periphery is with outer What cylinder (1) formation was slidably matched is tightly connected；Described annular closed cavity is vertically in uiform section structure；Described valve rod (4) leads to Cross the shaft shoulder (4a) to abut with the bottom surface of annular closed cavity.

Natural gas line pressure adjusting part the most according to claim 2, it is characterised in that described inner core (2) only may be used Being installed in urceolus (1) of movement, inner core (2) compresses plug screw (8) by the hollow form being screwed on urceolus (1) and fixes, plug screw (8) hollow part constitutes described baffle ring (6) and the installing space of spring (7)；The described pressure of suit it is formed with on described inner core (2) The bulge loop (2a) of contracting spring (7)；Described urceolus (1) upper end is formed with mounting flange dish (1a).

Natural gas line pressure adjusting part the most according to claim 2, it is characterised in that described pressure head (5) is set with On described valve rod (4), pressure head (5) coordinates face to be sealed by O (9) with the suit of valve rod (4)；Described pressure head (5) is in T Shape, pressure head (5) is adjacent to described leather bag (3) by the small end end face of T-shaped, and the outside of leather bag (3) is provided with end cap (11), this end cap (11) being connected on the described location shaft shoulder (4a), end cap (11) has the flange of the T-shaped small end peripheral part being fastened on pressure head (5), So that described leather bag (3) forms parcel to the T-shaped small end periphery of pressure head (5)；Pressure head (5) by leather bag (3) and end cap (11) by The location shaft shoulder (4a) on valve rod (4) forms axially location, and compresses by being screwed on the end cap (10) of valve rod (4), this end cap (10) the installation counterbore that pressure head (5) is provided with it is positioned at；Described mesopore includes pressure head through hole and stem through-hole, the pressure head being interconnected Through hole axially penetrates through pressure head (5), and stem through-hole is made up of the axial direction part being interconnected and radial section, and axial direction part is located at valve rod (4) On, and connect with pressure head through hole in valve rod (4) lower end, radial section is located on the location shaft shoulder (4a), and radial section is close with described annular Close cavity connection.

5. according to the pressure adjusting part of the natural gas line described in any one in Claims 1 to 4, it is characterised in that institute State a self-balance structure and include lever (17), drive rod (18), main leather bag (19), master tray (20) and main spring (21)；Main Pallet (20) is fitted in the upper side of described main leather bag (19), and lever (17) is hinged on the housing by middle part, lever (17) One end is provided with elongated slot, is combined with the bearing pin (16) being fixedly connected on described main valve plug (15) upper end in elongated slot, lever (17) another End be movably connected in described drive rod (18) lower end, drive rod (18) pass described main leather bag (19) and master tray (20), and by Middle part forms a fixed connection with main leather bag (19) and master tray (20), the cavity that main leather bag (19) downside is formed with described housing Connect with described pressure regulation back segment；Described master tray (20) is provided with described main spring (21), and main spring (21) is by being screwed on State the main regulation plug screw on housing to compress.

6. according to the pressure adjusting part of the natural gas line described in any one in Claims 1 to 4, it is characterised in that institute State cut-out spool (22) to be slidably fitted in cut-out valve body (24), described cut-out driving spring (23) be located at cut-out spool (22) and Cut off between valve body (24), cut off driving spring (23) and be used for when described lockable mechanism is in released state, cut off and drive bullet Spring (23) relies on elastic force to drive cut-out spool (22) mobile, and the fuel gas inlet of valve port (14) is formed closure；Described locking Mechanism includes lock pin (25), and lock pin (25) is by forming valve to cut-out spool (22) in the horizontal cannelure being inserted in cut-out spool (22) The locking of door opening, lock pin (25) is respectively provided on two sides with locking spring (26) and unlocks barrier film (27), locking spring (26) It is respectively used to the locking of lock pin (25) with unlocking barrier film (27) and unlocks mobile driving；Described unblock barrier film (27) and cut-out valve body (24) forming diaphragm cavity between, the medium entrance of this diaphragm cavity is connected with described pressure regulation back segment.

Natural gas line pressure adjusting part the most according to claim 6, it is characterised in that described lock pin (25) is circle Shape；The cannelure side of described cut-out spool (22) is formed with the cone shaft shoulder (22a), lock pin (25) and the described cone shaft shoulder (22a) formed in tangent abutting state the locking cutting off spool (22), the taper seat of this cone shaft shoulder (22a) and cut-out The angle α of spool (22) axis is between 75 °～85 °.

Natural gas line pressure adjusting part the most according to claim 6, it is characterised in that described lock pin (25) traverses At tubular element (28) middle part, the middle part of tubular element (28) is provided with and wears for traversing through the bar shaped of described cut-out spool (22) Hole, lock pin (25) is connected with described cut-out spool (22) by the part being positioned at tubular element (28) pipe；Tubular element (28) leads to Cross the mating holes formation sliding connection that the pipe outer wall of lock pin (25) side is provided with, this section of pipeline section with described cut-out valve body (24) Endoporus on be formed with interior step, the endoporus of this section of pipeline section installs described locking spring (26), and interior step and locking spring (26) one end abuts, and the other end of locking spring (26) is connected on spring tight plug screw (29), spring tight plug screw (29) It is screwed on described cut-out valve body (24)；Tubular element (28) is positioned at the far-end of lock pin (25) opposite side and connects with unlocking barrier film (27) Connect；Described unblock barrier film (27) middle part is fixedly connected with the dish type end liner (30) of rigidity；Described cut-out spool (22) is by front end pair The blast tube of described valve port (14) forms closure, cuts off spool (22) tail end and exposes described cut-out valve body (24) outside, cuts off Spool (22) tail end is formed with free-hand handgrip (22b).