CN101532572B

CN101532572B - Throttle valve

Info

Publication number: CN101532572B
Application number: CN2009100830177A
Authority: CN
Inventors: 张新国
Original assignee: 张新国
Current assignee: Beijing air navigation machinery equipment factory
Priority date: 2009-04-29
Filing date: 2009-04-29
Publication date: 2010-09-29
Anticipated expiration: 2029-04-29
Also published as: CN101532572A

Abstract

The invention belongs to the valve field and solves the problem that the throttle valve has a complex structure and the problem of improving flow regulation gradual changing performance. Two penetration holes having a female fish hole (9) and a male fish hole (10) at a valve core (6) are matched with two through holes on a valve base at two circular holes on the upper end face of a valve base cylindrical upper body (2). The valve core (6) is mounted in a cup barrel of an inverted cup body (18) with a protruding shoulder (17) connected to the lower end of a valve rod (16), and tightly pressed on the upper end face of the valve base cylindrical upper body (2). A sealing ring (21) with a driving mechanism driving the valve core (6) to rotate is arranged between the valve core (6) and the inner wall of the inverted cup body (18). A butterfly spring (20) is arranged between the upper opening of the valve core (6) and the bottom of the inverted cup body (18). A gland (24) penetrates throughthe valve rod (16), tightly presses a thrust bearing (3) on a convex shoulder (17), and is screwed on the external thread matched with the valve base cylindrical upper body (2). The beneficial effects are that the invention is simply structured, easily assembled, easily maintained and conveniently used, has good flow regulation gradual changing performance and long service life, and has no mediuminlet and outlet, and the end face seal is not easily leaked due to attrition.

Description

A kind of throttle valve

Technical field

The invention belongs to valve field, relate to a kind of throttle valve.

Background technique

Throttle valve is to be used for a kind of valve of flow of damping arrangement and pipeline medium, the spool of throttle valve of the prior art is the cone of truncated cone shape, the spool of needle shape throttling valve then is close to the circular cone build, the valve port of spool and valve seat is realized the switching of valve mostly with the linear sealing formula, with valve rod forward or backwards multi-turn rotating band movable valve plug in stem shaft to producing the displacement aperture of regulating spool gradually, realize standard-sized sheet or full cut-off, its deficiency is, complex structure, the fabricating cost height, Flow-rate adjustment gradual change performance is undesirable, because mechanical wear, linear sealing is easily impaired and cause and be not closed completely, and all has medium to advance in the use, the branch of outlet, must not be reverse in the installation, otherwise influence is used.

Summary of the invention

The technical problem that solves:

A kind of throttle valve is provided, adopts yin, yang fish hole and end face seal structure, drive spool forward or backwards with valve rod and rotate not enough half-turn simultaneously, the aperture of regulating spool gradually realizes standard-sized sheet or full cut-off, spool in stem shaft to not producing displacement, can overcome the deficiencies in the prior art, simple in structure, fabricating cost is low, easily assembling, Flow-rate adjustment gradual change performance is good, is difficult in the use being not closed completely the branch of no medium inlet/outlet because of mechanical wear causes, easily install and use, do not make mistakes.

The technological scheme that adopts:

A kind of throttle valve, comprise valve seat, spool, valve rod and gland, it is characterized in that: valve seat is processed by valve seat lower body and cylinder upper body integral body, have two openings on the valve seat, each by be positioned on the valve seat lower body horizontal hole be positioned at axial bore on the valve seat cylinder upper body and be interconnected respectively and constitute, the symmetrical configuration of two axial bores on the cylinder upper body, the centre distance of two circular holes of two axial bores on the top end of cylinder upper body is D; Spool and valve seat are supporting and be positioned on the valve seat cylinder upper body, the top of spool has axial inner groovy, have cloudy fish hole and positive fish hole on the bottom land of inner groovy and be open-work according to the bottom of the axial penetration spool of spool, with regard to the bottom of spool radially with regard to the arbitrary section, overlap with positive fish hole behind the Rotate 180 degree of cloudy fish hole on it, vice versa; Be diameter and make circular trace with the centre distance D of two circular holes on the top end of cylinder upper body by the center of two circular holes, cloudy fish hole and the structure of positive fish hole on spool all constitute along described circular trace, and it is supporting with two circular holes, the circle radius of fish head part equates with the radius of two circular holes, being end face seal structure between the top end of the bottom end of spool and valve seat cylinder upper body complements one another and contacts, must guarantee, rotary spool, can be simultaneously by the effect in cloudy fish hole and positive fish hole, make two circular hole standard-sized sheets or full cut-off on the top end of valve seat cylinder upper body gradually; Has O type seal groove on the middle part outer wall of spool, the supporting formula of spool is contained in the cup tube of inverted cup of the band crossette that is connected the valve rod lower end, be formed with medium storage chamber between the bottom land of the cup end of inverted cup and the inner groovy of spool, between the upper end-hole of the described cup end and spool, the butterfly spring is housed, be equipped with in the O type seal groove and the supporting seal ring of the inwall of inverted cup, have on the outer wall of the inwall of the lower end mouth of inverted cup and the lower end of spool and complement one another, and can drive the driving mechanism of spool rotation; Other has supporting thrust-bearing, after gland passes valve rod by its end face, thrust-bearing is pressed on the convex shoulder of described inverted cup, gland is tightened on the supporting outside thread of valve seat cylinder upper body by the internal thread on its lower end mouth, must guarantee, when compressing thrust-bearing, the butterfly spring is enough to compress, and does not influence rotary valve rod and realize reliable end face seal rotation by inverted cup drive spool.

Beneficial effect:

Simple in structure, fabricating cost is low, and easily assembling is because adopt yin, yang fish hole and end face seal structure, Flow-rate adjustment gradual change performance is good in the use, and be difficult for being not closed completely easy care, the branch of no medium inlet/outlet because of mechanical wear causes, easy to install, drive spool forward or backwards with valve rod and rotate not enough half-turn simultaneously, can nimblely realize standard-sized sheet or full cut-off reliably gradually, and long service life

Description of drawings

Fig. 1, Overall Group's assembling structure---full-gear schematic representation;

Fig. 2, press the A-A sectional view shown in Fig. 1, (a) regular prism drive-type, (b) key drive-type;

The structural representation of Fig. 3, valve rod 16, (c) regular prism drive-type, (d) key drive-type;

Fig. 4, analyse and observe by the B-B shown in Fig. 1---the valve seat plan view;

Embodiment

Further explanation in detail in conjunction with the accompanying drawings;

Shown in Fig. 1～4, have two openings on the valve seat, each by be positioned on the valve seat lower body 1 horizontal hole 3 be positioned at axial bore 4 on the valve seat cylinder upper body 2 and be interconnected respectively and constitute, the symmetrical configuration of two axial bores 4 on cylinder upper body 2, the centre distance of two circular holes 5 of two axial bores 4 on the top end of cylinder upper body 2 is D; Spool 6 is supporting and be positioned on the valve seat cylinder upper body 2 with valve seat, the top of spool 6 has axial inner groovy 7, have cloudy fish hole 9 and positive fish hole 10 on the bottom land 8 of inner groovy 7 and be open-work according to the bottom of the axial penetration spool 6 of spool 6, open-work is with regard to the radially arbitrary section of spool 6, overlap with positive fish hole 10 behind the 9 Rotate 180 degree of cloudy fish hole on it, vice versa; Centre distance D with two circular holes 5 on the top end of cylinder upper body 2 is that circular trace 11 is made at diameter and the center of crossing two circular holes 5, cloudy fish hole 9 and the structure of positive fish hole 10 on spool 6 all constitute along described circular trace 11, and it is supporting with two circular holes 5, the circle radius R of fish head part equates with the radius of two circular holes 5, being end face seal structure between the bottom end 12 of spool 6 and the top end 13 of cylinder upper body 2 complements one another and contacts, must guarantee, rotary spool 6, can be simultaneously by the effect of cloudy through hole 9 and positive through hole 10, make two circular hole 5 standard-sized sheets or full cut-off on the top end 13 of valve seat cylinder upper body 2 gradually; Has O type seal groove 14 on the middle part outer wall of spool 6, spool 6 supporting formulas are contained in the cup tube 19 of inverted cup 18 of the band crossette 17 that is connected valve rod 16 lower ends, be formed with medium storage chamber between the bottom land 8 of the cup end of inverted cup 18 and the inner groovy 7 of spool 6, upper end-hole at the described cup end and spool 6---be between the upper end-hole of inner groovy 7 butterfly spring 20 to be housed, the seal ring 21 supporting with the inwall of inverted cup 18 is housed in the O type seal groove 14, have on the outer wall of the lower end of the inwall of the lower end mouth of inverted cup 18 and spool 6 and complement one another, and can drive the driving mechanism of spool 6 rotations; Other has supporting thrust-bearing 23, after gland 24 passes valve rod 16 by its end face, thrust-bearing 23 is pressed on the crossette 17 of described inverted cup 18, gland 24 is tightened on the supporting outside thread of valve seat cylinder upper body 2 by the internal thread on its lower end mouth, must guarantee, when compressing thrust-bearing 23, butterfly spring 20 is enough to compress, and does not influence rotary valve rod 16 by the reliable end face seal rotation of inverted cup 18 drive spools, 6 realizations.

Shown in Fig. 1,2 (a), 3 (c), have on the outer wall of the lower end of the inwall of the lower end mouth of inverted cup 18 and spool 6 and complement one another, and the driving mechanism that can drive spool 6 rotations is the regular prism drive-type, the outer wall of the lower end of spool 6 is outer polygon regular prism body 15 types, the inwall of the lower end mouth of inverted cup 18 is interior polygon regular prism body 22 types, and supporting corresponding with outer polygon regular prism body 15 types; The polygon three～twelve edge that is generally in the described polygon regular prism perhaps is bilateral or quincunx.

Shown in Fig. 1,2 (b), 3 (d), have on the outer wall of the lower end of the inwall of the lower end mouth of inverted cup 18 and spool 6 and complement one another, and the driving mechanism that can drive spool 6 rotations is the key drive-type, have 25 1～four of axial keyways on the outer wall of the lower end of spool 6,26 1～four of axial bonds that have outer convex type on the inwall of the lower end mouth of inverted cup 18, and supporting corresponding with axial keyway 25; Or have the axial bond 26 of outer convex type on the outer wall of the lower end of spool 6, and have axial keyway 25 on the inwall of the lower end mouth of inverted cup 18, and supporting corresponding with the axial bond 26 of outer convex type.

Shown in Fig. 1,3, the inverted cup 18 of band crossette 17 comprises structure relevant with driving mechanism on its lower end mouth, processes with valve rod 16 integral body, perhaps make earlier separately and have the structure relevant with driving mechanism, the cylindrical shell with itself and inverted cup 18 welds together again.

Described cloudy fish hole 9, positive fish hole 10 are meant the yin, yang fish shape figure among the similar yin-yang eight diagram figure, but under a same fish circle radius, and each fish hole is when circular trace constitutes, and it contains radian is variable; Among the present invention, when each fish hole constitutes along circular trace 11, it contains the radian maximum value is that 180 degree subtract the γ degree, the γ degree is the angle that circular hole 5 is contained on circular trace 11, and each contained radian in fish hole is the throttle valve normal running, the angle of valve rod 16 required rotations when realizing standard-sized sheet or full cut-off gradually, so-called normal running is meant from the full cut-off to the standard-sized sheet or from the standard-sized sheet to the full cut-off to work in fish hole whole body, omnidistance continous way from the beginning to the end.Therefore, when the present invention used, the rotation number of degrees of valve rod 16 were limited, and stroke is short, and Flow-rate adjustment gradual change performance is good, and is not only easy to use, and it is little to wear and tear, long service life.

As shown in Figure 1, horizontal hole 3 has the internal thread interface structure, the convenient adapter.

Use for convenient, on the bidding quotation on the end face of gland 24, indicate the indicating graduation of full cut-off, have the location sign on the valve rod 16, and be the double scale of symmetric type, two sign to standard-sized sheet; Perhaps full cut-off is marked on the valve rod 16 to the indicating graduation of standard-sized sheet, and the location sign is marked on the bidding quotation on the end face of gland 24, and is the double scale of symmetric type, two sign.

Claims

1. throttle valve, comprise valve seat, spool, valve rod and gland, it is characterized in that: valve seat is processed by valve seat lower body and cylinder upper body integral body, have two openings on the valve seat, each by be positioned on the valve seat lower body horizontal hole be positioned at axial bore on the valve seat cylinder upper body and be interconnected respectively and constitute, the symmetrical configuration of two axial bores on the cylinder upper body, the centre distance of two circular holes of two axial bores on the top end of cylinder upper body is D; Spool and valve seat are supporting and be positioned on the valve seat cylinder upper body, the top of spool has axial inner groovy, have cloudy fish hole and positive fish hole on the bottom land of inner groovy and be open-work according to the bottom of the axial penetration spool of spool, with regard to the bottom of spool radially with regard to the arbitrary section, overlap with positive fish hole behind the Rotate 180 degree of cloudy fish hole on it, vice versa; Be diameter and make circular trace with the centre distance D of two circular holes on the top end of cylinder upper body by the center of two circular holes, cloudy fish hole and the structure of positive fish hole on spool all constitute along described circular trace, and it is supporting with two circular holes, the circle radius of fish head part equates with the radius of two circular holes, being end face seal structure between the top end of the bottom end of spool and valve seat cylinder upper body complements one another and contacts, must guarantee, rotary spool, can be simultaneously by the effect in cloudy fish hole and positive fish hole, make two circular hole standard-sized sheets or full cut-off on the top end of valve seat cylinder upper body gradually; Has O type seal groove on the middle part outer wall of spool, the supporting formula of spool is contained in the cup tube of inverted cup of the band crossette that is connected the valve rod lower end, be formed with medium storage chamber between the bottom land of the cup end of inverted cup and the inner groovy of spool, between the upper end-hole of the described cup end and spool, the butterfly spring is housed, be equipped with in the O type seal groove and the supporting seal ring of the inwall of inverted cup, have on the outer wall of the inwall of the lower end mouth of inverted cup and the lower end of spool and complement one another, and can drive the driving mechanism of spool rotation; Other has supporting thrust-bearing, after gland passes valve rod by its end face, thrust-bearing is pressed on the convex shoulder of described inverted cup, gland is tightened on the supporting outside thread of valve seat cylinder upper body by the internal thread on its lower end mouth, must guarantee, when compressing thrust-bearing, the butterfly spring is enough to compress, and does not influence rotary valve rod and realize reliable end face seal rotation by inverted cup drive spool.

2. a kind of throttle valve according to claim 1, it is characterized in that: have on the outer wall of the lower end of the inwall of the lower end mouth of inverted cup (18) and spool (6) and complement one another, and the driving mechanism that can drive spool (6) rotation is the regular prism drive-type, the outer wall of the lower end of spool (6) is outer polygon regular prism body (a 15) type, the inwall of the lower end mouth of inverted cup (18) is interior polygon regular prism body (a 22) type, and supporting corresponding with outer polygon regular prism body (15) type; Polygon in the described polygon regular prism is three～twelve edge.

3. a kind of throttle valve according to claim 1, it is characterized in that: have on the outer wall of the lower end of the inwall of the lower end mouth of inverted cup (18) and spool (6) and complement one another, and the driving mechanism that can drive spool (6) rotation is the key drive-type, have (25) one～four of axial keyways on the outer wall of the lower end of spool (6), (26) one～four of axial bonds that have outer convex type on the inwall of the lower end mouth of inverted cup (18), and supporting corresponding with axial keyway (25); Or have the axial bond (26) of outer convex type on the outer wall of the lower end of spool (6), and have axial keyway (25) on the inwall of the lower end mouth of inverted cup (18), and supporting corresponding with the axial bond (26) of outer convex type.

4. according to claim 1,2 or 3 described a kind of throttle valve, it is characterized in that: on the bidding quotation on the end face of gland (24), indicate the indicating graduation of full cut-off to standard-sized sheet, valve rod has the location sign on (16), and is the double scale of symmetric type, two sign; Perhaps full cut-off is marked on the valve rod (16) to the indicating graduation of standard-sized sheet, and the location sign is marked on the bidding quotation on the end face of gland (24), and is the double scale of symmetric type, two sign.