CN2594581Y

CN2594581Y - Axial-flow type pressure regulator

Info

Publication number: CN2594581Y
Application number: CN 02294344
Authority: CN
Inventors: 张人杰; 殷蔚
Original assignee: SHANGHAI FIORENTINI GAS EQUIPMENT CO Ltd
Current assignee: SHANGHAI FIORENTINI GAS EQUIPMENT CO Ltd
Priority date: 2002-12-31
Filing date: 2002-12-31
Publication date: 2003-12-24
Anticipated expiration: 2012-12-31

Abstract

The utility model discloses an axial-flow type pressure regulator which comprises casings, wherein a sleeve barrel valve clack which is arranged on the centre line of the casing body and a diaphragm whose the middle is clamped by an upper fixing plate and a lower fixed plate which are used for clamping the sleeve barrel valve clack are arranged in the casings, wherein both ends of the diaphragm are respectively supported by a sealing ring and a guiding ring. In addition, the utility model also comprises a pressure regulator spring which is arranged between each fixed plate and the inlet part of each casing. A rubber sealing surface is arranged on a valve seat ring which can be arranged on a supporting seat by a valve seat cover board and screws in a floating mode, and the supporting seat is clamped between the casing bodies and is positioned at the outlet end of the pressure regulator. The axial-flow type pressure regulator also comprises an indicating system, wherein one end of an indicating rod in the indicating system penetrates through a hole on each casing to extend in a scale plate, and the other end can flexibly rotate and move in a diaphragm fixing plate. An engaging surface of the valve seat ring and the supporting seat is in a spherical surface shape, an axial clearance and a radial clearance are arranged between the valve seat cover board and the valve seat ring, and the valve seat ring can automatically adjust the direction. The utility model solves the problem of closed sealing performance, so the valve seat ring can be driven by the valve clack to rotate correspondingly to the valve clack when the axial-flow type pressure regulator is closed. Thus, the cutting edge of the valve clack can uniformly contact the sealing surface to be pressed tightly to avoid leakage.

Description

Axial flow pressure regulator

Technical field

The utility model relates to a kind of gas pressure regulator, governor, relates in particular to a kind of axial flow pressure regulator that is used in the combustion gas voltage regulating station.

Technical background

Gas pressure regulator, governor is the most important assembly of combustion gas voltage regulating station, and its effect is that the gaseous-pressure that the upstream is higher is reduced to the lower pressure of pipe network or pipeline and keeps stable.Gas pressure regulator, governor can be divided into according to the structural type of pressure regulation throttle element: cut-off type pressure governor, diaphragm type pressure governor, axial flow pressure regulator etc.Homemade gas pressure regulator, governor is the cut-off type pressure governor at present, its throttle element is a stop valve, the spherical valve body that an integral body is arranged, the open-shut device of valve (spool) is along the valve seat axial-movement, its direction is perpendicular with import and export fuel gas flow direction, combustion gas is the mobility status complexity in valve, and flow losses are big.

Fig. 1 provides the sectional structure of existing axial flow pressure regulator, and the external casing of this main voltage regulator is often formed by 2～4, uses bolt each other.The inner member more complicated of main voltage regulator 24, primary component be, as the sleeve flap 25 of main voltage regulator 24 open-shut device, it is positioned on the center line of housing, its two ends each by seal ring and guide ring supporting, be difficult to float; Diaphragm 26 is the actuation elements in the main voltage regulator 24, the upper and

lower fixing plate

29,30 that its core is clamped sleeve flap 25 clamps, thereby be fixed on the sleeve flap 25, and its edge section is clamped by housing, thus sleeve flap 25 relatively housing move axially; Main voltage regulator 24 springs 31 are between fixed plate 29 and housing inlet part 27; Rubber seal face 32 is positioned on the seat ring 33, together by valve seat cover plate 34 and screw on bearing 39, the latter is clamped between the housing, be positioned at the outlet end of main voltage regulator 24, thereby the seat ring sealing surface is fixed, can not float, the cutting edge of sleeve flap 25 was pressed on the sealing surface 32 and plays seal action when main voltage regulator 24 was closed, good seal request flap cutting edge and sealing surface plane are parallel to each other, this just needs very high machining accuracy, if machining accuracy is not enough, cause flap cutting edge and sealing surface plane not parallel, another side pressure gets tightly inadequately thereby a side pressure of the surface of contact of flap cutting edge and sealing surface gets very tight, so will leak, can cause main voltage regulator 24 back pressure (being closing pressure) to raise.Main voltage regulator 24 also has the one stroke indicator in addition, it mainly acts on is the aperture of indicating main voltage regulator 24 at any time, thereby play the effect that monitors main voltage regulator 24 work, can also be used to calculated flow rate and obtain Flow characteristics, mainly comprise indicating arm 28, O RunddichtringO 35 etc., the hole that indicating arm 28 1 ends pass on the housing is stretched in the scale plate, directly indicate aperture, or join with displacement transducer, and by O RunddichtringO 35 seal up by inner chamber along indicating arm to external leakage, indicating arm 28 the other ends are connected with fixed plate 29, move axially with sleeve flap 25 and fixed plate, because the relation of machining accuracy, this end must have is fixedly making possibility mobile and that rotate in the board slot, existing Placement mainly contains two kinds: a kind of is to adorn a thin disk at this end, and this disk is inserted in the groove of fixed plate 29, and axial-radial is all gapped, because it is gapped, just might move and rotate, but thereby between indicated stroke of indicating arm 28 and aperture certain error is just arranged, relatively difficulty is installed also.Another kind is to adorn an elastic clip, is stuck in the groove of fixed plate, forms point with groove and contacts, and need the pressure elasticity folder during motion, thereby frictional force is bigger.

Summary of the invention

The purpose of this utility model is to provide a kind of axial flow pressure regulator, its throttle element adopts an axial flow valve, the moving direction of open-shut device flows to consistent with import and export, combustion gas mobility status in valve is simple, so just reduce gas flow and crossed the flow resistance of pressure governor, thus the passing capacity that makes axial flow pressure regulator big than the pressure governor of the other types of identical bore.

Another purpose of the present utility model is the sealing problem when solving pressure governor and closing, and having proposed can self-adjusting seat ring, and promptly seat ring can suitably rotate relative to its bearing, and does not have journey error and the little travel indicator of frictional force.

To achieve these goals, the utility model adopts following technological scheme, a kind of axial flow pressure regulator, comprise housing, element in the housing has the sleeve flap that is positioned on the housing center line, each is supported its two ends by seal ring and guide ring, core clamped the sleeve flap on, the diaphragm that bottom plate clamps, pressure governor spring between fixed plate and housing inlet part, rubber seal face is positioned on the seat ring, and but seat ring is installed on the bearing by valve seat cover plate and screw floating ground, described bearing is clamped between the housing, and be positioned at the outlet end of pressure governor, described axial flow pressure regulator also comprises an indication mechanism, the hole that indicating arm one end in the described indication mechanism passes on the housing is stretched in the scale plate, and the other end can rotate flexibly in the diaphragm fixed plate and move.

It is characterized in that the Surface of action between described seat ring and its bearing is spherical shape, axle, radial clearance are arranged between described valve seat cover plate and the seat ring, described seat ring can be adjusted direction automatically.

Description of drawings

Below, with reference to accompanying drawing, for those skilled in the art that, to the detailed description of the present utility model, above-mentioned and other purposes of the present utility model, feature and advantage will be apparent.

Fig. 1 is the sectional view of existing axial flow pressure regulator;

Fig. 2 is a system principle flow chart of the present utility model;

Fig. 3 is a main pseudosection of the present utility model.

Embodiment

See also Fig. 2, axial flow pressure regulator of the present utility model comprises main voltage regulator 24 and loaded pilot system 22 (director system) two large divisions, is connected by pilot line 23 between two-part.

See also Fig. 3, axial flow pressure regulator of the present utility model comprises: housing inlet part 1, outlet cover plate 8, housing inlet part 1 is connected and fixed with outlet cover plate 8 usefulness bolts, housing exit portion 9 is connected with outlet cover plate 8 usefulness screws, bearing 10, its effect is supporting seat ring 12 and forms airflow path, has low flow resistance, valve seat cover plate 11, seat ring 12,10 Surface of action of seat ring 12 and bearing are made spherical shape, and O RunddichtringO 21 is arranged therebetween, between valve seat cover plate 11 and the seat ring 12 axle are arranged, radial clearance, seat ring 12 can change its sensing neatly, thus with sleeve flap 18 cutting edge keeping parallelisms.When main voltage regulator 24 of the present utility model was closed, 12 of flap 18 and seat rings just had good applying, thereby good seal performance during zero delivery, and closing pressure is low; Sleeve flap 18 is open-shut device of main voltage regulator 24, be connected with diaphragm 14 with bottom plate 13 by upper mounted plate 15, and form movement parts, it also is subjected to the power of spring 17 effects except that pressure at both sides, these equilibrium of forces have determined the position of open-shut device, that is the aperture of main voltage regulator 24.When outlet pressure changed, throttling pressure regulation effect was finished in the corresponding change of main voltage regulator 24 apertures.Throttle nozzle 16 is arranged in bottom plate.

The utility model also comprises an indication mechanism, it comprises the cover piece 1 that is installed in the housing, cover piece 24, indicating arm O RunddichtringO 19, be installed in the cover plate 5 in the upper mounted plate 15, bead 6, ball seat 7, indicating arm 2 one ends insert in the indicating arm O RunddichtringO 19, when sleeve flap 18 is done to open and close motion, indicating arm 2 moves in cover piece and O RunddichtringO 19, the stroke of reflection sleeve flap 18 is the aperture of main voltage regulator 24, the other end of indicating arm is connected with bead 6, can in ball seat, rotate with ball, and it is mobile flexibly along cover plate with ball seat, do not have axial clearance, thereby can guarantee that indicating arm 2 can correctly indicate the aperture of main voltage regulator 24, frictional loss is again little.

Seat ring 12 of the present utility model, its sealing surface 20 is made by rubber, directly sulfuration is on seat ring 12, the Surface of action that seat ring 12 and its bearing are 10 is processed into sphere, between valve seat cover plate 11 and the seat ring 12 axle is arranged, radial clearance, it has just limited the slewing area of seat ring, thereby seat ring 12 can be done rotating of three directions relative to bearing 10, flap 18 1 sides contact with sealing surface 20 earlier when main voltage regulator 24 is closed, like this under the pushing effect of flap 18, seat ring 12 can be met to flap 18 in corresponding rotation, guaranteeing has good applying and evenly compresses between sealing surface 20 and sleeve flap 18 cutting edges, thereby good seal performance during zero delivery, therefore the closing pressure of main voltage regulator 24 also can not raise.

One end of the indicating arm 2 of indicator of the present utility model is adorned a bead 6, and bead 6 is installed in 7 of two ball seats made by friction reducing abrasion resistant material, and bead 6 is that conical surface contacts with sphere with 7 of two ball seats, thereby indicating arm 2 can rotate flexibly with bead 6.Two ball seats 7 can move flexibly, and this nested structure are installed on the diaphragm fixed plate 15 between two cover plates 5, thereby indicating arm 2 can be rotated and slide freely, do not have journey error, and frictional force is also very little.

Below in conjunction with the schematic representation of the utility model system, tell about the working procedure and the elemental motion of the utility model axial flow pressure regulator.Action element in this axial flow pressure regulator is a diaphragm 14, and diaphragm 14 is accepted outlet pressure, formed from the elastic force of the pressure of the propellant of pilot valve and spring 17 and make a concerted effort, and this power is exactly the motive force that opens and closes sleeve flap 18.Pressure governor is (Normally closed type) of cutting out before gas enters main voltage regulator 24, when gas during by main voltage regulator 24 imports a small gangs of pressurized gas enter the driving chamber (diaphragm 14 outlet sides) of main voltage regulator 24 here by loaded pilot system 22 (loaded pilot system 22 working principles are not done and given unnecessary details), make diaphragm 14 disequilibriums, diaphragm 14 drives sleeve flap 18 to left movement, main voltage regulator 24 is opened, gas flows out vertically by flap 18, thereby set up certain operating mode, when main voltage regulator 24 back gas flow demands strengthen, the corresponding reduction of main voltage regulator 24 outlet pressures, the gas pressure of main voltage regulator 24 outlets feeds back to loaded pilot system 22 by control valve 23, the valve port of pilot valve is opened greatly, make that entering the gas pressure that drives chamber increases, thereby promoting sleeve flap 18 moves to left, being about to main voltage regulator 24 opens greatly, flow by main voltage regulator 24 increases, make the gas pressure of main voltage regulator 24 outlets return to original value, and when main voltage regulator 24 back gas flow demands reduce, the corresponding rising of pressure of main voltage regulator 24 outlets, gas pressure feeds back to loaded pilot system 22 by control valve 23, the valve port of pilot valve turns down, make that entering the gas pressure that drives chamber descends, so diaphragm 14 drives sleeve flap 18 and moves right, thereby main voltage regulator 24 is turned down, reduce flow, make the gas pressure of main voltage regulator 24 outlets return to original value by main voltage regulator 24.

The utility model has solved the problem of closing sealing, and flap can impel seat ring to do corresponding rotation to meet to flap when closing, so the flap cutting edge just compresses with the sealing surface even contact, just can not leak.

More than all embodiments only for the explanation the utility model usefulness, but not to restriction of the present utility model, person skilled in the relevant technique, under the situation that does not break away from spirit and scope of the present utility model, can also make various conversion or variation, so all technological schemes that are equal to also should belong to category of the present utility model and should be limited by each claim.

Claims

1, a kind of axial flow pressure regulator, comprise housing, element in the housing has the sleeve flap that is positioned on the housing center line, each is supported its two ends by seal ring and guide ring, core clamped the sleeve flap on, the diaphragm that bottom plate clamps, pressure governor spring between fixed plate and housing inlet part, rubber seal face is positioned on the seat ring, and but seat ring is installed on the bearing by valve seat cover plate and screw floating ground, described bearing is clamped between the housing, and be positioned at the outlet end of pressure governor, described axial flow pressure regulator also comprises an indication mechanism, the hole that indicating arm one end in the described indication mechanism passes on the housing is stretched in the scale plate

2, axial flow pressure regulator according to claim 1, it is characterized in that, described indication mechanism further comprises a bead, described bead is arranged between two ball seats, and is conical surfaces and the contacting of sphere with two ball seats, and described ball seat is between two cover plates, described indicating arm one end inserts in the seal ring, the other end is connected with described bead, can rotate in ball seat with ball, and move flexibly along cover plate with ball seat.