CN102494156A

CN102494156A - Pressure releasing command valve

Info

Publication number: CN102494156A
Application number: CN2011104198041A
Authority: CN
Inventors: 杨四云; 张明霞
Original assignee: CHONGQING KETE INDUSTRIAL VALVE Co Ltd
Current assignee: CHONGQING KETE INDUSTRIAL VALVE Co Ltd
Priority date: 2011-12-15
Filing date: 2011-12-15
Publication date: 2012-06-13
Anticipated expiration: 2031-12-15
Also published as: CN102494156B

Abstract

This invention discloses a pressure releasing command valve; by dint of a special structure arrangement, the pressure releasing command valve disclosed by this invention makes an elastic part which has a control action develop the action through a two-grade action method and reduces impact for a sealing structure when a device is acted; in addition, pipelines are arranged more reasonably; the valve disclosed by this invention improves traceability of the device for changing of fluid pressure and increases response speed for the changing of the fluid pressure.

Description

The pressure release command valve

Technical field

The present invention relates to a kind ofly can relate in particular to a kind of pressure release command valve to the control hydraulic pressure valve that carries out pressure release.

Background technique

In the existing technology; The valve of similar structure adopts Regulation spring (parts shown in the mark 8 in the structure of the present invention) is directly affacted the mode of structure on the sealing surface between spool and the valve seat; Make that the sealing surface of valve seat and spool need bear very big impact force when device moved under hydraulic pressure, sealing surface damages easily; Influence the life-span of valve, and this scheme of having only an elastic member makes Regulation spring need very big length just can meet the demands; The power of Regulation spring all is loaded on the sealing surface of seat, thereby influences the working life of sealing surface; And its pilot pressure need pass through the longer pipe road could arrive performance control action in second radial hole, and it is slower to the speed of response that hydraulic pressure changes, and influences the proper functioning of valve.

Summary of the invention

To the problem in the background technique, the present invention proposes a kind of pressure release command valve, comprise valve seat, valve body, mangetic core assembly, spring seat and Regulation spring, valve body is provided with an axial bore and three radial holes; Article three, radial hole is communicated with axial bore and external environmemt; Article three, radial hole is followed successively by first radial hole, second radial hole and the 3rd radial hole from left to right; Valve seat inserts and first radial hole is sealed from the left end of axial bore, makes between first radial hole and two other radial hole and isolates, and also with the left end sealing of axial bore, valve seat is fixedly connected with valve body valve seat simultaneously; The valve seat interior edge face is provided with axial shrinkage pool, and the valve seat sidewall is provided with relief hole radially, is communicated with through shrinkage pool and relief hole between first radial hole and two other radial hole; The spring seat left end inserts and axial bore is sealed from the right-hand member of axial bore, can be in axial sliding between spring seat and the valve body; Mangetic core assembly places in the space between axial bore valve seat and the spring seat; The Regulation spring left end contacts with the spring seat right side, and Regulation spring applies pretightening force to spring seat;

Innovation part of the present invention is: said mangetic core assembly is made up of spool, valve core case, valve core spring, piston and valve core spring seat; The spool left end is provided with a sealing head, and when sealing head contacted with valve seat, shrinkage pool was closed; The spool middle part is a reduced diameter section, and the spool right-hand member is an enlarged diameter section, and the diameter of reduced diameter section is littler than enlarged diameter section; The intersection of reduced diameter section and enlarged diameter section forms a sealing surface;

Valve core case is provided with axial variable cross section through hole, and the left side section diameter of variable cross section through hole is less than right section diameter, and the left side section diameter of variable cross section through hole is greater than the reduced diameter section diameter of spool; The reduced diameter section of spool is socketed in the left side section of variable cross section through hole, and the sealing head of spool places outside the left side of valve core case, and the enlarged diameter section of spool places in the right section of valve core case; Axial slide relative between valve core case and the spool; The valve core case outer wall contacts with the axial bore inwall; Valve core case is provided with pod apertures radially, and pod apertures is communicated with the 3rd radial hole and variable cross section through hole; The left side section of variable cross section through hole forms a step surface with the intersection of right section, step surface when sealing surface on the spool contacts, second radial hole and the isolation of the 3rd radial hole; Step surface when sealing surface on the spool separates, between second radial hole and the 3rd radial hole through variable cross section through hole and pod apertures connection; Distance of relative movement between valve seat and the spool is designated as length A, and the stroke of relative movement is designated as length B between spool and the valve core case, and length A is greater than length B;

Valve core spring seat left side is provided with spring eye, and valve core spring places in the spring eye; Valve core spring seat left end is fixedly connected with the valve core case right-hand member, keeps at a certain distance away between valve core spring seat left end and the spool right-hand member; Valve core spring is in compressive state all the time; Valve core spring seat right-hand member contacts with the spring seat left side; Can be in axial sliding between valve core spring seat and the valve body, the stroke of the relative movement between valve core spring seat and the valve body is designated as length C, and length C equals length B and adds length A;

Piston sleeve is connected on valve core spring seat middle part, and piston is fixedly connected with the valve core spring seat; The space at place, piston left side is communicated with the 3rd radial hole.

Useful technique effect of the present invention is: adopt the structural type of two-stage spring, avoid bigger spring force directly to affact on the sealing surface working life of the sealing surface of prolongation; The total compact, the speed of response that fluid pressure changes is fast, makes valve possess better control effect.

Description of drawings

Fig. 1, structural representation of the present invention when mangetic core assembly is not installed;

Component locations when Fig. 2, device are in a state concerns schematic representation;

Component locations when Fig. 3, device are in the b state concerns schematic representation;

Fig. 4, the present invention are connected the complete structural representation in back with peripheral components.

Embodiment

The component parts of pressure release command valve of the present invention comprises valve seat 1, valve body 2, mangetic core assembly, spring seat 7 and Regulation spring 8, and the structure of each parts and interconnected relationship are:

Valve body 2 is provided with an axial bore 2-1 and three radial holes; Article three, radial hole is communicated with axial bore 2-1 and external environmemt; Article three, radial hole is followed successively by the first radial hole 2-2, the second radial hole 2-3 and the 3rd radial hole 2-4 from left to right; Valve seat 1 inserts and the first radial hole 2-2 is sealed from the left end of axial bore 2-1, makes between the first radial hole 2-2 and two other radial hole and isolates, and also with the left end sealing of axial bore 2-1, valve seat 1 is fixedly connected with valve body 2 valve seat 1 simultaneously; Valve seat 1 interior edge face is provided with axial shrinkage pool 1-1, and valve seat 1 sidewall is provided with relief hole 1-2 radially, is communicated with through shrinkage pool 1-1 and relief hole 1-2 between the first radial hole 2-2 and two other radial hole; Spring seat 7 left ends insert and axial bore 2-1 are sealed from the right-hand member of axial bore 2-1; Can be in axial sliding between spring seat 7 and the valve body 2 (certainly; Also be provided with on the valve body 2 spring is carried out spacing and mangetic core assembly is carried out spacing block parts, see structure shown in the mark 12 among the figure); Mangetic core assembly places in the space between axial bore 2-1 valve seat 1 and the spring seat 7; Regulation spring 8 left ends contact with spring seat 7 right sides; Regulation spring 8 applies pretightening force to spring seat 7, and (the big I of pretightening force is adjustment flexibly as required; The housing of install adjustment spring 8 and the setting of other structural members are the basic skills that those of ordinary skill should be grasped, and repeat no more at this); Measuring hole (seeing structure shown in the mark 10 among the figure) also can be set on the valve body 2, be used for the setting pressure instrument;

In the aforementioned structure, the first radial hole 2-2 is used for pressure release, and the second radial hole 2-3 is used for carrying control hydraulic pressure, and the 3rd radial hole 2-4 is used for the action of actuating valve core assembly and carries control hydraulic pressure to the second radial hole 2-3;

Core innovative point of the present invention is the structure of mangetic core assembly, and its concrete structure is: said mangetic core assembly is made up of spool 3, valve core case 4, valve core spring 5, piston 6 and valve core spring seat 9; Spool 3 left ends are provided with a sealing head 3-1, and when sealing head 3-1 contacted with valve seat 1, shrinkage pool 1-1 was closed; Spool 3 middle parts are reduced diameter section 3-2, and spool 3 right-hand members are enlarged diameter section 3-3, and the diameter of reduced diameter section 3-2 is littler than enlarged diameter section 3-3; The intersection of reduced diameter section 3-2 and enlarged diameter section 3-3 forms a sealing surface 3-4;

Valve core case 4 is provided with axial variable cross section through hole, and the left side section 4-1 diameter of variable cross section through hole is less than right section 4-2 diameter, and the left side section 4-1 diameter of variable cross section through hole is greater than the reduced diameter section 3-2 diameter of spool 3; The reduced diameter section 3-2 of spool 3 is socketed in the left side section 4-1 of variable cross section through hole, and the sealing head 3-1 of spool 3 places outside the left side of valve core case 4, and the enlarged diameter section 3-3 of spool 3 places in the right section 4-2 of valve core case 4; Axial slide relative between valve core case 4 and the spool 3; Valve core case 4 outer walls contact with axial bore 2-1 inwall; Valve core case 4 is provided with pod apertures 4-3 radially, and pod apertures 4-3 is communicated with the 3rd radial hole 2-4 and variable cross section through hole; The left side section 4-1 of variable cross section through hole forms a step surface 4-4 with the intersection of right section 4-2, step surface 4-4 when sealing surface 3-4 on the spool 3 contacts, the second radial hole 2-3 and the 3rd radial hole 2-4 isolation; Step surface 4-4 when sealing surface 3-4 on the spool 3 separates, between the second radial hole 2-3 and the 3rd radial hole 2-4 through variable cross section through hole and pod apertures 4-3 connection; Distance of relative movement between valve seat 1 and the spool 3 is designated as length A, and the stroke of relative movement is designated as length B between spool 3 and the valve core case 4, and length A is greater than length B;

Valve core spring seat 9 left sides are provided with spring eye, and valve core spring 5 places in the spring eye; Valve core spring seat 9 left ends are fixedly connected with valve core case 4 right-hand members, keep at a certain distance away between valve core spring seat 9 left ends and spool 3 right-hand members; Valve core spring 5 is in compressive state all the time; Valve core spring seat 9 right-hand members contact with spring seat 7 left sides; Can be in axial sliding between valve core spring seat 9 and the valve body 2; The stroke of the relative movement between valve core spring seat 9 and the valve body 2 is designated as length C, and length C is greater than length B

Piston 6 is socketed in valve core spring seat 9 middle parts, and piston 6 is fixedly connected with valve core spring seat 9; The space at place, piston 6 left sides is communicated with the 3rd radial hole 2-4.Wherein, The radii size of piston 6 can be adjusted as required; If the radius of piston 6 during less than axial bore 2-1 internal diameter, can increase gasket ring, with the guidance quality of assurance piston 6 axial motions piston 6 outside; If the radius and the axial bore 2-1 internal diameter of piston 6 just mate, then take out gasket ring and get final product (mark 11 shown structures promptly are gasket rings in the Figure of description);

Working principle of the present invention is: 1) when superpressure, proper functioning do not appear in the hydrodynamic pressure in the oil-gas gathering and transportation pipeline; Each parts of pressure release command valve are in position shown in Figure 2; The active force of Regulation spring 8 is greater than the thrust of medium to piston 6 at this moment; Spring seat 7 left sides contact with valve body 2 right sides (in fact spring seat 7 be with valve body 2 on bounding means contact, can think that bounding means is exactly the part of valve body 2) and with valve core spring seat 9 top of turning left, piston 6 and valve core case 4 also are in maximum displacement place of left-hand thereupon; At this moment; Spool 3 is also pushed up left by valve core spring 5, the sealing head 3-1 of spool 3 left ends withstand on the valve seat 1 shrinkage pool 1-1 opening and with shrinkage pool 1-1 sealing, make between the first radial hole 2-2 and all the other two radial holes to be in isolation; The second radial hole 2-3 and the 3rd radial hole 2-4 are in connected state through the duct on the valve core case 4; Control valve is in closed condition.

2) excessive when the hydrodynamic pressure in the oil-gas gathering and transportation pipeline, when surpassing normal operating pressure: as shown in Figure 3; The active force to the right that hydraulic pressure causes piston 6 greater than Regulation spring 8 when left the active force that spring seat 7 applies; Valve core spring seat 9 is along with piston 6 moves right to maximum displacement place of dextrad, because length C is greater than length B, the sealing surface 3-4 on the spool 3 contacts with step surface 4-4 on the valve core case 4; Make the duct on the valve core case 4 be closed; Isolate between the second radial hole 2-3 and the 3rd radial hole 2-4, stoped the 3rd radial hole 2-4 to continue to transmit hydraulic pressure, simultaneously to the second radial hole 2-3; The sealing head 3-1 of spool 3 left ends also with valve seat 1 on shrinkage pool 1-1 separate; Make win radial hole 2-2 and second radial hole 2-3 connection, the liquid of high pressure just outwards releases through the first radial hole 2-2, and the hydraulic pressure in the second radial hole 2-3 is reduced; Control valve is opened pressure release.

Certainly, to the process that the superpressure working state transforms, there is intermediateness from the normal pressure working state in the action of device certainly, and promptly sealing surface 3-4 and step surface 4-4 are in open mode, and sealing head 3-1 and shrinkage pool 1-1 are in semi-open state simultaneously.

Preamble all is that example describes with hydraulic pressure, and real fluid can also be a gas.

The immediate product of structural type and the present invention possibly be DANFLO Control Valves 400 Series Model 20 products that Neil valve company produces; The present invention by comparison; The present invention has adopted the two-stage spring that restoring force is provided, and avoids because of the single-stage spring directly acts on sealing surface being caused excessive shock, and has improved the life-span of sealing surface; And the pipeline setting is more reasonable; Make the variation in pressure of valve convection cell more responsive, improved the speed of response of device, the control better effects if.

Claims

1. a pressure release command valve comprises valve seat (1), valve body (2), mangetic core assembly, spring seat (7) and Regulation spring (8), and valve body (2) is provided with an axial bore (2-1) and three radial holes; Article three, radial hole is communicated with axial bore (2-1) and external environmemt; Article three, radial hole is followed successively by first radial hole (2-2), second radial hole (2-3) and the 3rd radial hole (2-4) from left to right; Valve seat (1) inserts and first radial hole (2-2) is sealed from the left end of axial bore (2-1); Make between first radial hole (2-2) and two other radial hole and isolate; Also with the left end sealing of axial bore (2-1), valve seat (1) is fixedly connected with valve body (2) valve seat (1) simultaneously; Valve seat (1) interior edge face is provided with axial shrinkage pool (1-1), and valve seat (1) sidewall is provided with relief hole (1-2) radially, is communicated with through shrinkage pool (1-1) and relief hole (1-2) between first radial hole (2-2) and two other radial hole; Spring seat (7) left end inserts and axial bore (2-1) is sealed from the right-hand member of axial bore (2-1), can be in axial sliding between spring seat (7) and the valve body (2); Mangetic core assembly places in the space between axial bore (2-1) valve seat (1) and the spring seat (7); Regulation spring (8) left end contacts with spring seat (7) right side, and Regulation spring (8) applies pretightening force to spring seat (7);

It is characterized in that: said mangetic core assembly is made up of spool (3), valve core case (4), valve core spring (5), piston (6) and valve core spring seat (9); Spool (3) left end is provided with a sealing head (3-1), and when sealing head (3-1) and valve seat (1) when contacting, shrinkage pool (1-1) is closed; Spool (3) middle part is reduced diameter section (3-2), and spool (3) right-hand member is enlarged diameter section (3-3), and the diameter of reduced diameter section (3-2) is littler than enlarged diameter section (3-3); Reduced diameter section (3-2) forms a sealing surface (3-4) with the intersection of enlarged diameter section (3-3);

Valve core case (4) is provided with axial variable cross section through hole, and left side section (4-1) diameter of variable cross section through hole is less than right section (4-2) diameter, and left side section (4-1) diameter of variable cross section through hole is greater than reduced diameter section (3-2) diameter of spool (3); The reduced diameter section (3-2) of spool (3) is socketed in the left side section (4-1) of variable cross section through hole; The sealing head (3-1) of spool (3) places outside the left side of valve core case (4), and the enlarged diameter section (3-3) of spool (3) places in the right section (4-2) of valve core case (4); Axial slide relative between valve core case (4) and the spool (3); Valve core case (4) outer wall contacts with axial bore (2-1) inwall; Valve core case (4) is provided with pod apertures (4-3) radially, and pod apertures (4-3) is communicated with the 3rd radial hole (2-4) and variable cross section through hole; The left side section (4-1) of variable cross section through hole forms a step surface (4-4) with the intersection of right section (4-2), and the sealing surface (3-4) on step surface (4-4) and the spool (3) is when contacting, second radial hole (2-3) and the 3rd radial hole (2-4) isolation; Sealing surface (3-4) on step surface (4-4) and the spool (3) is when separating, between second radial hole (2-3) and the 3rd radial hole (2-4) through variable cross section through hole and pod apertures (4-3) connection; Distance of relative movement between valve seat (1) and the spool (3) is designated as length A, and the stroke of relative movement is designated as length B between spool (3) and the valve core case (4), and length A is greater than length B;

Valve core spring seat (9) left side is provided with spring eye, and valve core spring (5) places in the spring eye; Valve core spring seat (9) left end is fixedly connected with valve core case (4) right-hand member, keeps at a certain distance away between valve core spring seat (9) left end and spool (3) right-hand member; Valve core spring (5) is in compressive state all the time; Valve core spring seat (9) right-hand member contacts with spring seat (7) left side; Can be in axial sliding between valve core spring seat (9) and the valve body (2), the stroke of the relative movement between valve core spring seat (9) and the valve body (2) is designated as length C, and length C equals length B and adds length A;

Piston (6) is socketed in valve core spring seat (9) middle part, and piston (6) is fixedly connected with valve core spring seat (9); The space at place, piston (6) left side is communicated with the 3rd radial hole (2-4).