CN101680559B

CN101680559B - Pressure regulation valve

Info

Publication number: CN101680559B
Application number: CN2008800178929A
Authority: CN
Inventors: 和田义正; 长冈正利
Original assignee: Nissan Tanaka Corp
Current assignee: Nissan Tanaka Corp
Priority date: 2007-12-07
Filing date: 2008-12-05
Publication date: 2012-04-18
Anticipated expiration: 2028-12-05
Also published as: TWI392988B; WO2009072597A1; JP5017374B2; JPWO2009072597A1; TW200931217A; CN101680559A

Abstract

A pressure regulation valve (1) comprises a cap (202) provided with a wall (20B), a housing (10) arranged on the opening (20A) side of the cap (202) and having a valve seat (16C), a diaphragm (32) arranged between the cap (202) and the housing (10), a valve element (31) interlocking with the diaphragm (32) for opening/closing the valve seat (16C), an adjusting spring (33) pressing the diaphragm (32), a pressing member (39), and an adjusting screw (36) screwed into a female screw (26) formed in the wall (20B) and adjusting the adjusting spring (33) through the pressing member (39). In this pressure valve (1), the wall (20B) is formed integrally with the cap (202) and a through hole (202A) forming a first contact portion (25B) to be in contact with the pressing member (39) is formed in the cap (202).

Description

Pressure regulator valve

Technical field

The present invention relates to can be to regulating the pressure regulator valve that upper limit of pressure limits.

Background technique

At present; As the pressure regulator valve of regulating pressure; Use the back pressure valve of regulating the first side hydrodynamic pressure and the reduction valve (for example with reference to patent documentation 1) of regulating the second side hydrodynamic pressure, this pressure regulator valve is regulated pressure through opening and closing valve seat by the valve body with the diaphragm interlock; Wherein, valve seat is formed between the outflow side stream of inflow side stream that the first side fluid flows into and the outflow of second side fluid, and diaphragm is owing to the pressure of first side fluid or second side fluid is out of shape.

Pressure regulator valve for this structure; For example under the situation that is reduction valve; Pressure reduction when the second side fluid; Then valve body leaves and makes inflow side stream and outflow side stream to be communicated with from valve seat, and fluid flows to second side from first side, and adjusting is regulated setting pressure by the flexible state of the spring of pressuring film plate.

For example in JISB6803 (being the equal of ISO2503), following regulation is arranged about this pressure regulator valve; Promptly, the pressure of second side should design and produce and become to be no more than 0.15MPa when handling acetylene gas, when handling oxygen, answer the working pressure regulating handle and make spring not become be adjacent to bar-shaped.

Patent documentation 1: japanese kokai publication hei 7-12245 communique

Summary of the invention

The technical problem that invention will solve

But; For example the regulating handle at pressure regulator valve is removed under the next situation; The handle that replaces regulation is installed the regulating handle of other different pressure regulator valves of reach and when excessively pressing pressuring film plate; Exist the upper limit of pressure of being regulated to change, might reliably limit the problem of upper limit pressure.

If think the reduction length of restraining spring, then common structure complicates and the part number can increase, and when having improved processing cost and assembly cost, also has the problem that becomes authorized pressure need regulate sometimes for upper limit pressure limit.

The present invention considers this situation and makes that purpose is to provide a kind of pressure regulator valve, can be limited in set upper limit pressure with the upper limit of pressure that simple structure just possibly regulated fluid.

The technological scheme that the technical solution problem is adopted

In order to solve above-mentioned problem, the present invention proposes following mechanism.

Pressure regulator valve of the present invention possesses: possess: lid, and one of which is distolateral to be configured to opening portion and in another distolateral wall portion that is provided with, to form internal thread in this wall portion; Housing, it is configured in the opening portion side of said lid, and have inflow side stream, outflow side stream and be formed on said inflow side stream and said outflow side stream between valve seat; Diaphragm, it is configured between said lid and the said housing, utilizes the hydrodynamic pressure of said inflow side stream side or said outflow side stream side and can be out of shape; Valve body, the distortion interlock of itself and said diaphragm and move and open and close said valve seat; Spring, it is configured in the said lid, distolaterally pushes said diaphragm by one of axial direction; Pressing component, its another of said axial direction that is configured in said spring is distolateral; Adjusting screw, it combines with said internal thread screw thread, can forward-reverse, and regulate the pressing force of said spring via said pressing component; Wherein, Said lid and said wall portion form as one; And form to the flexible direction of said spring in surrounding wall portion and to extend and the through hole of the inside and outside perforation of said lid, said through hole is to make said one distolaterally to be compressed first abutting part more than the established amount by butt sheet butt as limiting said spring on the said pressing component with being formed on.

According to pressure regulator valve of the present invention; When the setting pressure of regulated fluid; Through making the pressing component and the first abutting part butt; Limit pressing component and come by pressuring film plate, prevent to surpass set upper limit pressure, and can prevent excessively to screw in and being adjacent to of the spring that causes by adjusting screw owing to adjusting screw excessively screws in the upper limit that makes the hydrodynamic pressure of being regulated with the pressing force more than the pressing force corresponding with upper limit pressure.

In addition,, cover, and can easily confirm the running-active status of spring from the outside of lid so easily pressing component is assembled into because first abutting part forms the through hole of lid.

Because the wall portion of another distolateral setting at lid is formed with internal thread, and be integrally formed this wall portion and abutting part and lid, thus the elongation range of Regulation spring exactly, and can keep upper limit pressure reliably.

Because wall portion and lid form as one, and are shed to the outside of lid so can prevent pressing component.

In the pressure regulator valve, said through hole also can be make said another distolateral be formed on said pressing component by butt sheet butt and as the restriction said spring be elongated to second abutting part more than the established amount.

According to pressure regulator valve of the present invention, because by butt sheet and first abutting part and the second abutting part butt, the flexible stroke of spring is limited, so in the scope that the pressure regulation range of pressure regulator valve can be limited in stipulating.

Also can be configured in the said pressing component in the pressure regulator valve the interior week of said spring, and possess the protuberance of the said spring lateral shift of restriction.

According to pressure regulator valve of the present invention, because pressing component is configured in the interior week of spring, and possesses the protuberance of restraining spring lateral shift, thus can make spring stably flexible, can stable maintenance upper limit pressure and carry out pressure and regulate.

The effect of invention

According to pressure regulator valve of the present invention, can prevent that pressing component is shed to the outside of lid, and can be limited in hydrodynamic pressure below the set upper limit pressure reliably.

Description of drawings

Fig. 1 is the longitudinal section of the reduction valve of expression one embodiment of the invention;

Fig. 2 is lid and the figure of pressing component that simply representes the reduction valve of one embodiment of the invention;

Fig. 3 is the figure in III-III cross section in the presentation graphs 2;

Fig. 4 is a side view of simply representing the pressing component of one embodiment of the invention;

Fig. 5 A is the figure of the reduction valve effect of expression one embodiment of the invention, is the not longitudinal section of butt state of the expression pressing component and first abutting part;

Fig. 5 B is the figure of the reduction valve effect of expression one embodiment of the invention, is the longitudinal section of the expression pressing component and the first abutting part butt state.

Description of reference numerals

The maximum diameter of DA pressing component

1 reduction valve (pressure regulator valve)

10 housings

12 flow into path

14 outflow pathway

202 lids

The 20A opening portion

20B wall portion

25B first abutting part

25C second abutting part

26 internal threads

32 diaphragms

33 Regulation springs

36 adjusting screw

39 pressing components

39A, 39B are by the butt sheet

Embodiment

Below to Fig. 5 B reduction valve 1 is described based on Fig. 1.

Fig. 1 is the figure of pressure regulator valve of expression one embodiment of the invention, and reference character 1 is the reduction valve (pressure regulator valve) that the pressure to for example acetylene gas reduces pressure, and upper limit pressure is set to 0.15MPa.

As shown in Figure 1, reduction valve 1 possesses: housing 10, lid 202, pressure regulating mechanism 30 and handle 40, pressure regulating mechanism 30 has: valve body 31, diaphragm 32, Regulation spring (spring) 33, bear dish 34, pressing component 39, adjusting screw 36 and bar 37.

Housing 10 links with the opening portion 20A side of lid 202, configuration diaphragm 32 between housing 10 and lid 202.

Housing 10 is for example processed by metals such as brass; Be formed with: the outflow side stream 14 that the inflow side stream 12 that the first side fluid flows into, second side fluid flow out, connection stream 16, the recess 17 that is communicated with inflow side stream 12 and outflow side stream 14, recess 17 is communicated with outflow side stream 14 through pilot hole 14C.

Inflow side stream 12 for example possesses: be formed with the internal thread that is used for being connected with joint etc. and an end and flow into effluent road 12A, flow into effluent road 12A to first and be communicated with the second inflow side stream 12B of stream 16 connections to first of housing 10 outside openings.

Outflow side stream 14 for example possesses: be formed with the internal thread that is used for being connected and an end with joint etc. to first of housing 10 outside openings flow out effluent road 14A, the second outflow side stream 14A and be communicated with the second outflow side stream 14B of stream 16 connections.

Axes O 1 arranged coaxial that is communicated with stream 16 and Regulation spring 33; For example possess the cross section and be circular large diameter hole 16A and small diameter bore 16B; Be formed with peripheral edge portion from small diameter bore 16B in the bottom of the large diameter hole 16A that is connecting large diameter hole 16A and small diameter bore 16B to the side-prominent annular convex of large diameter hole 16A, this annular convex becomes the valve seat 16C that is opened and closed by valve body 31.

Among the large diameter hole 16A, begin and order is being accommodated valve body 31 and by pressing spring 19, valve body 31 can move freely on axes O 1 direction from valve seat 16C, and can utilize by pressing spring 19 and push to valve seat 16C side, valve seat 16C can be opened and closed by valve body 31.

Small diameter bore 16B forms a large diameter hole 16A and is communicated with recess 17, can accommodate bar 37 movably to axes O 1 direction among the small diameter bore 16B, and small diameter bore 16B becomes the part of the stream that is communicated with inflow side stream 12 and outflow side stream 14.

Recess 17 opens wide and is covered by diaphragm 32 towards lid 202 sides, and the pressure of the second side fluid that flows into to recess 17 via pilot hole 14C is applied on the diaphragm 32.

Like Fig. 2, shown in Figure 3; The pressing component accommodation section 24B of lid 202 and spring accommodation section 28B are made up of the first recess 21B of drum; To be formed with the width that a pair of (two) extend to axes O 1 direction about axes O 1 symmetry be the through hole 202A of W1 to the surrounding wall portion of 24B in the pressing component accommodation section, forms the first abutting part 25B by the wall of the opening portion 20A side (another is distolateral) of through hole 202A.

Through hole 202A along the wall of axes O 1 a direction side (distolateral) relative with abutting part 25B as the second abutting part 25C.

Lid 202 is one distolateral as opening portion 20A; And the end many step circle tubular roughly arranged in the sealing of another distolateral formation wall 20B of portion; Possess: accommodate first recess 21 and the opening portion 20A side and diameter second recess 22 big that are positioned at first recess 21 of Regulation spring 33 in interior all sides, be formed with the screw thread that is used for housing 10 bindings in the opening portion 20A of second recess 22 side than the diameter of first recess 21.

For example utilize the cutting of casting or machining and make the 20B of wall portion as the part of lid 202 and one-body molded with lid 202, central part forms the internal thread 26 coaxial with the axes O of Regulation spring 33 1, and adjusting screw 36 combines with internal thread 26 screw threads.

Internal thread 26 for example forms as one with lid 202 through the 20B of wall portion is carried out machining.

Internal thread 26 also can constitute with 20B of wall portion and the 20B of the portion various parts intercalation of the finished wall of screw thread or be not installed in the structure of the 20B of wall portion with not coming off; At this moment; The size and dimension that is used to be provided with the hole of the parts that are formed with internal thread 26 will form: even under the situation of this element falling, pressing component 39 is not outwards extracted from covering 202 yet.

Diaphragm 32 is the circular planar sheet metals of rubber-like; Can with the direction of planar face quadrature on freely bloat; Central part and valve body 31 link; Or be connected with the bar that is used to link 37, and be configured to peripheral edge portion and clamped by housing 10 and lid 202, cover the opening portion of the recess 17 of housing 10.

Diaphragm 32 bloats to axial direction by the pressure in the recess 17, and this recess 17 is communicated with outflow side stream 14 through pilot hole.

Regulation spring 33 can freely stretch on axes O 1 direction, and is housed in spring accommodation section 28B, and one is distolateral via bearing dish 34 and be bearing on the diaphragm 32, and another is distolateral to be bearing on the adjusting screw 36 via pressing component 39.

Regulation spring 33 makes diaphragm 32 bloat to recess 17 sides owing to the reduction of second side hydrodynamic pressure is extended, and owing to the rising of second side hydrodynamic pressure is compressed, the distortion of this diaphragm 32 is transmitted to valve body 31 via linking parts 32A and bar 37.

Consequently valve body 31 moves with the distortion interlock of diaphragm 32 and opens and closes valve seat 16C.

Bearing dish 34 overlooks and is circle; Possesses the wall portion that peripheral edge portion erects gently; Regulation spring 33 1 sides that are configured in diaphragm 32 are born the distolateral of Regulation spring 33, utilize across diaphragm 32 be configured in and bear the opposite side of dish 34 binding parts 32A screw thread and be installed on the diaphragm 32.

As shown in Figure 4; Pressing component 39 is that to have many step circle of minor diameter protuberance 35A tabular; Be formed with the roughly cone shape recess 35B of supporting protuberance 36A of supporting adjusting screw 36 at end face with the opposite side of minor diameter protuberance 35A, can 33 another distolateral interior weeks of configuration adjustment spring in the periphery of minor diameter protuberance 35A.

Be formed with about said pressing component 39 centrosymmetric positions width W 2 that a pair of (two) extend to diameter laterally by butt sheet 39A, 39B.This by butt sheet 39A with can be different shapes also by butt sheet 39B, but be identical shape in the present embodiment.

Pressing component 39 by

butt sheet

39A, 39B through with through hole 202A in the first abutting part 25B butt that forms limit Regulation spring 33 and be compressed to more than the established amount.

The size of pressing component accommodation section 24B is configured to make pressing component 39 to be in the attitude of pushing Regulation spring 33 to axes O 1 direction, promptly, the axis of pressing component 39 can change attitude on axes O 1 direction.

For example when the maximum diameter of pressing component 39 be the thickness of DA, maximum dimension D A part be LA, be attached at by the periphery of

butt sheet

39A, 39B between the length of (overall dimensions part) be that LC, width are that the minimum diameter (internal diameter that is equivalent to spring accommodation section 28B) of the inner circle wall of W2, lid 202 is that the width of D21, through hole 202A is when being W1

DA＜D21＜LC, and

W2＜W1。

Length L C is relevant in the length of axes O 1 direction with through hole 202A; Be set at that kind as shown in Figure 2 pressing component 39 obliquely when the first recess 21B inserts; When a side by butt sheet 39A to the through hole 202A of a side insert and with the situation of the second abutting part 25C butt under, can make opposite side by the minimum diameter of butt sheet 39B through all sides in the first abutting part 25B of opposite side through hole 202A.

It is that the thickness of DA, maximum dimension D A part is that the external diameter of LA, minor diameter protuberance 35A is that the thickness of DB, minor diameter protuberance 35A is LB that pressing component 39 is removed by the maximum diameter that forms discoideus part of

butt sheet

39A, 39B.

Consequently; Pressing component 39 can be housed in the parts accommodation section 24B that is pressed from opening portion 20A side; And make by

butt sheet

39A, 39B with the attitude of pushing Regulation spring 33 and to insert to through hole 202A; Thereby prevent that 24B comes off from the pressing component accommodation section, and utilizing adjusting screw 36 to make Regulation spring 33 when the direction of compression moves, utilization can limit a Regulation spring 33 with the butt of the first abutting part 25B and be compressed to more than the established amount.

Adjusting screw 36 has forward end by the roughly cone shape supporting protuberance 36A of undergauge at front end; Combine with internal thread 26 screw threads and can be, and the recess 35B butt of supporting protuberance 36A and pressing component 39 supports Regulation spring 33 at the axes O 1 direction forward-reverse of Regulation spring 33.

One end of bar 37 and valve body 31 butts, the binding parts 32A butt of the other end and diaphragm 32 transmits the deformation displacement that bloats of diaphragm 32 central parts to valve body 31.

In the present embodiment, bar 37 is and links the structure that parts 32A transmits to valve body 31 with valve body 31 butts and the displacement that diaphragm 32 distortion cause, but also can be and the structure of binding parts 32A and valve body 31 these both sides or arbitrary side binding.

Handle 40 is roughly cylindric that the end is arranged; On the length direction of periphery, be formed with recess; Be embedded with the adjusting screw 36 coaxial with axes O 1 in the drum inboard of bottom central portion; This adjusting screw 36 combines with internal thread 26 screw threads, makes adjusting screw 36 relative internal thread 26 forward-reverses through handle with sleeve 40.

The effect of explanation reduction valve 1 below.

Reduction valve 1 is utilizing the pressing force of Regulation spring 33 that valve body 31 is left from valve seat 16C when diaphragm 32 applied pressures reduce, and valve seat 16C is opened, and stream 12 flows to outflow side stream 14 fluid from the inflow side.

When diaphragm 32 applied pressures are higher than the pressure of stipulating; Then Regulation spring 33 is compressed; And utilize the pressing force by pressing spring 19 to make valve body 31 and valve seat 16C butt, valve seat 16C is closed, and stream 12 stops to the mobile of outflow side stream 14 fluid from the inflow side.

The pressure of reduction valve 1 is regulated and is carried out through rotating above-mentioned handle 40, and when making adjusting screw 36 rotations and forward-reverse when rotating above-mentioned handle 40, supporting protuberance 36A makes Regulation spring 33 flexible on the direction of axes O 1 via pressing component 39.

Before supporting protuberance 36A and then under the Regulation spring 33 compressed situation, the pressing force that diaphragm 32 is applied becomes big, and the adjusting pressure of second side fluid uprises.

Pressure at the second side fluid is under the situation of regulation range, and is such shown in Fig. 5 A, pressing component 39 by

butt sheet

39A, 39B not with the first abutting part 25B butt, adjusting screw 36 can forward-reverse.

In the present embodiment; Unscrew adjusting screw 36 rotating above-mentioned handle 40; For example under the situation that the supporting protuberance 36A that makes adjusting screw 36 leaves from the recess 35B of pressing component 39; Then pressing component 39 by

butt sheet

39A, 39B and the second abutting part 25C butt, pressing component 39 has just limited Regulation spring 33 and has been elongated to more than the specific length.

Consequently can be adjusted in the second side hydrodynamic pressure of reduction valve 1 in the predetermined range through rotating above-mentioned handle 40.

Then, then such shown in Fig. 5 B when utilizing handle 40 to rotate adjusting screw 36 when supporting protuberance 36A is advanced, pressing component 39 by

butt sheet

39A, 39B and the first abutting part 25B butt, adjusting screw 36 can not be advanced.

Consequently handle 40 can not be rotated further; And pressing component 39 can not continue compression adjustment spring 33; The pressure of the second side fluid the when pressing component 39 that the pressing force of diaphragm 32 is no longer increased and the first abutting part 25B butt just becomes the upper limit pressure of second side fluid, can prevent the overpressure of second side fluid.

Because pressing component 39 can not be pulled out from covering 202, so, can prevent owing to the be not pressed generation of the situation that the pressure of the second side fluid that causes can not be conditioned of diaphragm 32 even adjusting screw 36 is too relaxed or adjusting screw 36 comes off yet.

Owing to be formed with minor diameter protuberance 35A in the pressing component 39; And minor diameter protuberance 35A is configured in the interior week of Regulation spring 33; So can suppress another of Regulation spring 33 distolateral with pressing component 39 to the big relatively skew of direction of axes O 1 quadrature, can make Regulation spring 33 stably flexible.Pressure that consequently can stable regulation second side fluid.

At present; For the length of regulating Regulation spring 33 during rotation adjusting screw 36; Because friction, the rotation of adjusting screw 36 is transmitted to Regulation spring 33 via pressing component 39, Regulation spring 33 is produced around the distortion of axes O 1 with by the timeliness that distortion causes change; The compressive force of Regulation spring 33 might change, or owing to distortion makes diaphragm 32 possible damaged.

Therefore; Transmitting to pressing component 39 with the rotation that suppresses adjusting screw 36 in the existing technology is purpose; Generally be to form sharp-pointed shape or spherical shape to the front end of adjusting screw 36 reducing the area of contact with pressing component 39, or contact via solid of rotation such as balls, but because reduction valve equal pressure modulating valve is being inserted through hole 202A by

butt sheet

39A, 39B; The rotation of adjusting screw 36 can not transmitted to Regulation spring 33, so do not need above-mentioned existing structure.

According to lid 202, when being shaped the through hole 202A that constitutes the first abutting part 25B by machinings such as cuttings, can process easily.

And, can easily confirm by the butt state of

butt sheet

39A, 39B.

In the foregoing description; Be illustrated forming situation cylindraceous to the first recess 21B; But the rib that also can for example extend to the inside to diameter in the interior week formation of the first recess 21B; In the inboard formation of the front end spring accommodation section of this rib, and make the maximum dimension D A of pressing component 39 littler than the internal diameter of spring accommodation section.

At this moment, can be by

butt sheet

39A, 39B through between the rib of adjacency, can make pressing component 39 accommodating more easily and carry out effectively to pressing component accommodation section 24B.

The present invention is not limited to the foregoing description, can carry out various changes in the scope that does not break away from inventive concept.

In the foregoing description, be that the situation of reduction valve 1 is illustrated to pressure regulator valve, but replace reduction valve 1 also to go for back pressure valve.

In the foregoing description; One distolateral to axes O 1 direction of the through hole 202A that forms in the lid 202 as the first abutting part 25B; And be illustrated another distolateral situation as the second abutting part 25C, but also can be for example not another distolateral wall as the second abutting part 25C.

In the foregoing description; To being configured in valve body 31 the connection stream 16 that is communicated with inflow side stream 12 and outflow side stream 14; The structure that opens and closes valve seat 16C is illustrated, but certainly for utilizing diaphragm 32 valve body is moved to open and close the various pressure regulator valves of valve seat also can be suitable for.

In the foregoing description, be that circular situation is illustrated to pressing component accommodation section 24B, spring accommodation section 28B, pressing component 39 from overlooking of seeing of axes O 1 direction, but the shape of overlooking for example also can be other shapes such as polygonal.

In the foregoing description; The gas that reduction valve 1 is handled for example is that the situation of acetylene gas is illustrated; But as the gas of handling except with the gas headed by combustion-supporting property gas such as inflammable gas such as inert gases such as nitrogen, argon, hydrogen, methane, ethene and oxygen and the corrosive gass such as chlorine, sulfur dioxide, also can be the various fluids such as liquid that contain water, acid or alkali as object.

Situation about constituting with the metallic plectane has been described about diaphragm 32; But for material except with the metal headed by the stainless steel; Also can use rubber membrane, synthetic resin film etc. to have other materials of elastic force; And being not limited to discoideus flat board for shape, can be that the center makes diaphragm 32 form the situation of ring-type rib with valve body 31 also for example, perhaps uses the part of stero shapes such as sphere to constitute diaphragm 32.

Pressure regulator valve of the present invention possesses: lid, and one of which is distolateral to be configured to opening portion and in another distolateral wall portion that is provided with, to form internal thread in this wall portion; Housing, it is configured in the opening portion side of said lid, and have inflow side stream, outflow side stream and be formed on said inflow side stream and said outflow side stream between valve seat; Diaphragm, it is configured between said lid and the said housing, utilizes the hydrodynamic pressure of said inflow side stream side or said outflow side stream side and can be out of shape; Valve body, the distortion interlock of itself and said diaphragm and move and open and close said valve seat; Spring, it is configured in the said lid, distolaterally pushes said diaphragm by one of axial direction; Pressing component, its another of said axial direction that is configured in said spring is distolateral; Adjusting screw, it combines with said internal thread screw thread and can forward-reverse, and regulates the pressing force of said spring via said pressing component; Wherein, Said lid and said wall portion form as one; And form to the flexible direction of said spring in surrounding wall portion and to extend and the through hole of the inside and outside perforation of said lid, said through hole is to make said one distolaterally to be compressed first abutting part more than the established amount by butt sheet butt as limiting said spring on the said pressing component with being formed on.

According to the present invention, can prevent that pressing component is shed to the outside of lid, and can be limited in hydrodynamic pressure below the set upper limit pressure reliably.

Claims

1. pressure regulator valve possesses:

Lid, one of which is distolateral to be configured to opening portion and in another distolateral wall portion that is provided with, to form internal thread in this wall portion;

Housing, it is configured in the opening portion side of said lid, and have inflow side stream, outflow side stream and be formed on said inflow side stream and said outflow side stream between valve seat;

Diaphragm, it is configured between said lid and the said housing, utilizes the hydrodynamic pressure of said inflow side stream side or said outflow side stream side and can be out of shape;

Valve body, the distortion interlock of itself and said diaphragm and move and open and close said valve seat;

Spring, it is configured in the said lid, distolaterally pushes said diaphragm by one of axial direction;

Pressing component, its another of said axial direction that is configured in said spring is distolateral;

Adjusting screw, it combines with said internal thread screw thread and can forward-reverse, and regulates the pressing force of said spring via said pressing component;

Wherein, said lid and said wall portion form as one, and form to the flexible direction of said spring in surrounding wall portion and to extend and the through hole of the inside and outside perforation of said lid,

To be the opening portion side that makes said lid be compressed first abutting part more than the established amount by butt sheet butt as the said spring of restriction on the said pressing component with being formed on to said through hole; When the said adjusting screw of rotation and when its opening portion side towards said lid is advanced, the said of said pressing component can not be advanced said adjusting screw by butt sheet and the said first abutting part butt.

2. pressure regulator valve as claimed in claim 1, wherein,

Said through hole be make said another distolateral be formed on said pressing component by butt sheet butt and as more than the said spring of the restriction elongation established amount, and regulate second abutting part of said spring shift motion.

3. like claim 1 or the described pressure regulator valve of claim 2, wherein,

Be configured in the interior week of said spring to said pressing component, and possess the protuberance of the said spring lateral shift of restriction.