CN1260458A

CN1260458A - High-pressure valve

Info

Publication number: CN1260458A
Application number: CN 00100961
Authority: CN
Inventors: 阿道夫·K·韦兰
Original assignee: WEYLAND AS
Current assignee: WEYLAND AS
Priority date: 1999-01-12
Filing date: 2000-01-12
Publication date: 2000-07-19
Anticipated expiration: 2020-01-12
Also published as: JP3576058B2; FR2788325A1; CN1131386C; CA2258450C; FR2788325B1; CA2258450A1; DE10000950A1; JP2000274536A

Abstract

A valve comprises a one piece valve body defining a fluid passage in which a closure member is disposed for selectively allowing and blocking fluid flow therethrough. A top entry stem extends into the valve body to transmit motion to the closure member. An integral external retainer is provided for cooperating with an outer abutment surface of the stem to prevent the same from being blown out of the valve body during use. A thrust bearing is disposed between the abutment surface of the stem and the external retained to reduce the operating torque. The one piece valve body design eliminates the joints and seals which are potential leak paths and the external retainer ensures that the thrust bearing be not influence by the temperature of the processed fluid.

Description

High pressure valve

The present invention relates to valve, more particularly, relate to high pressure valve.

Traditional high pressure rotary valve, for example plug valve and ball valve generally include a valve body; Described valve body defines a fluid passage, a revolution closure member wherein has been installed so that stop up selectively or allow fluid to flow through; Described closure member has a penetration hole.Be provided with a valve rod, in order that between the opening and closing position, rotate closure member; At open position, align with the fluid passage of valve body in the hole of running through closure member, in closed position, the hole of running through closure member the valve body fluid passage laterally.Described valve rod extends through the valve stem passage perpendicular to the fluid passage from the inside of valve body.Usually, the valve gap screwed on valve body is so that cooperate with the shoulder of stem bottom, thereby prevents that valve rod from spraying from valve body when bearing high internal fluid pressure.In addition, valve rod can be inserted an end of single-piece valve body, be held on the throne by an inner butting surface in the valve stem passage of valve body in inside then, butting surface is used for cooperating with the shoulder that is arranged on stem bottom.

Although being connected of above-mentioned valve rod and valve body is enough to prevent that valve rod from spraying from valve body, they have greatly increased the moment of torsion of operating valve.Therefore, a packing ring has been installed, thereby has been reduced the operation moment of torsion at the valve rod shoulder with between the butting surface of the valve body that cooperates with it.Yet, in actual applications, the place that the process fluid temperature is higher, it is debatable that above-mentioned packing ring is installed.

Therefore, an object of the present invention is to provide a kind of high pressure valve, described valve has the valve rod of preventing ejection protective gear, can not increase the moment of torsion of operating valve simultaneously significantly.

Another object of the present invention provides a kind of like this valve, and its manufacturing is simple and economical.

Therefore, according to the invention provides a kind of high pressure valve, it comprises a single-piece valve body, and described valve body defines a fluid passage of extending along a flow axes; Also comprise a closure member, it is installed in the valve body and has a hole of running through valve body.One valve rod and closure member engagement, and extend to outside the valve stem passage that forms in the valve body so that between open position and closed position, rotate closure member around a horizontal spin axis in flow axes; At open position, described penetration hole coaxially aligns with the fluid passage of valve body, and in closed position, described hole is horizontal the fluid passage.One sealing system is set to prevent leakage along valve stem passage from valve body.High pressure valve also comprises a protective system that prevents valve rod ejection, and described valve rod ejection protective system comprises a platform that separates with valve body, and forms an opening that aligns with valve stem passage and be used for receiving the valve rod that therefrom passes through.Described platform and valve body are monolithic constructions.Between platform and valve body, on the valve rod outside the sealing system, be provided with bearing means and cooperate with platform, its objective is under the effect that prevents the hydrodynamic pressure of valve rod in valve body from valve body, to spray.

After feature of the present invention having been carried out summarizing, below with reference to accompanying drawings, the preferred embodiments of the present invention are described in the above, wherein:

Fig. 1 is the perspective exploded view according to ball valve of the present invention;

Fig. 2 is the longitudinal sectional drawing of the ball valve of Fig. 1;

Fig. 3 is the cross-sectional view of expansion of details of the valve rod assembly of expression ball valve.

Referring now to accompanying drawing,, the high pressure valve 10 that uses element of the present invention is described specifically referring to figs. 1 through Fig. 3.High pressure valve 10 comprises the valve body 12 of a single-piece, and described valve body 12 defines an axially extended fluid passage 14; A ball valve element 16 has been installed in its fluid passage 14 to be used for optionally stopping up and to allow fluid to flow through valve body 12.Ball valve element 16 has spherical outer surface and runs through its center hole 18.The spherical outer surface of ball valve element 16 engages hermetically with downstream valve seat 20 and upstream valve seat 22.As shown in Figure 2: downstream valve seat 20 is installed in the groove 24, and described groove is vertically around the inside of fluid passage 14 at valve body 12.

One loaded ring 26 and one separate the upstream that sleeve 28 tightly is positioned at upstream valve seat 22; In circular groove inboard, that in valve body 12, form, be provided with a retaining ring 30 around fluid passage 14, its objective is in order to keep upstream valve seat 22; Loaded ring 26 and separation sleeve 28 are in valve body 12.

Downstream valve seat 20 and upstream valve seat 22 can form with metal.

The bottom that extends through the single-piece valve rod 32 of the valve stem passage 34 that forms in valve body 12 is connected with ball valve element 16, so that rotate ball valve element around the spin axis perpendicular to fluid passage 14 between open position and closed position; At open position, center hole 18 aligns vertically with fluid passage 14, in closed position, center hole 18 in the fluid passage 14 laterally.Form two radially relative parallel planes 36 in the bottom of valve rod 32, described plane 36 is assemblied in the groove 38 that forms in the upper surface of ball valve element 16, thus when rotation valve rod 32 roating sphere element 16.

Valve rod 32 comprises the part 40 that the bottom enlarges, and the contiguous bottom that forms plane 36 of this part also comprises a middle small diameter portion 42, and this part adjacent bottom enlarged 40 forms a shoulder 44 between described bottom enlarged 40 and the middle small diameter portion 42; The top 46 that also comprises an enlarged in addition.

As shown in Figure 3, valve stem passage 34 forms the minor diameter inside 47 of guiding fluid passage 14, the mid diameter part 48 of contiguous minor diameter inside 47, outside 50 with an enlarged, between minor diameter inner 47 and mid diameter part 48, form first shoulder 52, and between mid diameter part 48 and enlarged outside 50, form second shoulder 54.

The lining 56 that self is formed with central passage leans against on first shoulder 52, and round the bottom enlarged 40 of valve rod 32, lining 56 is as the bearing and the bottom guide member of valve rod 32.

The outside 50 of the bottom enlarged 40 of valve rod 32 and the enlarged of valve stem passage 34 forms an annular together and fills the chamber, wherein filling suitable packing, be included in two packing rings 58 between bottom squeeze ring 60a and the top squeeze ring 60b, it is used to prevent round valve rod 32 leakage of 14 from the fluid passage.Bottom squeeze ring 60a is leaning second shoulder 54.

Packing is keeping under the effect of axial pressure by black box 62.Black box 62 comprises the seal cartridge 64 that cracks of metal, and this lining 64 is installed on the valve rod 32 and above the outer surface of top squeeze ring 60b.The seal cartridge 64 that cracks forms an axially extended hole 66 (see figure 1)s, and this hole cooperates with the middle small diameter portion 42 of valve rod 32.As shown in Figure 1, slotted liner bushing 64 has vertical slit 68 of an opening, closely is enclosed within on the valve rod 32 thereby this lining can be opened then.As can be seen from Figures 2 and 3, round the inboard in axially extended hole 66, formed axially extended groove 69 in the underpart of the seal cartridge 64 that cracks, it is used to receive the upper end of the base diameter enlarged 40 of valve rod 32.As described in detail below, slotted liner bushing 64 allows valve rod 32 from the outside of valve body 12, by valve stem passage, the valve body 12 of packing into.

Black box 62 further comprises a seal element 70, and sealing element 70 has longitudinal center hole 72 (see figure 1)s, and extend by this center hole on the top of the seal cartridge 64 that cracks.With reference to Fig. 3, seal element 70 axially inwardly, around center hole 66 inboards, form a groove 74, it is used for receiving three Bei Shi (Belleville) packing ring 76; These three packing rings are round slotted liner bushing 62 and against the annular shoulder of lining 62, thereby provide to a certain degree self-regulation for the wearing and tearing of compensation packing.With reference to Fig. 1, seal element 70 is connected in valve body 12 by a pair of stud bolt 84, and this extends through the axial side opening 80 on the seal element 70 respectively to bolt 84 and enters valve body 12 in that part of respective aperture 82 that upward forms of valve stem passage.Packing adjusting nut 86 is screwed in the upper end of stud bolt 84, Belleville washer 76 is pressed on the shoulder 78, thereby the seal cartridge 64 that just cracks applies a clamping load on packing.

Platform 86 remotely is connected in valve body 12, so that cooperate with an annular shoulder 88 of the axially outer end of the middle small diameter portion 42 that is arranged on valve rod 32, has prevented from like this to make valve rod 32 from valve stem passage 34 ejections owing to the effect of the hydrodynamic pressure in the valve body 12.According to a kind of preferred construction of the present invention, be provided with a pair of elongated element 90 in the both sides of platform 86, this element extends downwardly into the outer surface of valve body 12 from platform 86, and in the relative both sides of valve rod 32, its objective is in order to form holistic platform and valve body structure.In fact, platform 86 and elongated element 90 and valve body 12 cast solids.As shown in Figure 1, the center hole 92 of platform 86 is co-axially aligned so that receive valve rod 32 with the valve stem passage 34 of valve body 12.At the lower surface of platform 86, form a groove 94 round the inboard of center hole 92, and define a ring-shaped step 95 with this center hole 92.

In groove 94, be provided with slotted liner bushing 96 with center hole 98 round the top 46 of the enlarged of valve rod 32 and against shoulder 88.The base flange 100 of slotted liner bushing 96 is docked with the annular shoulder 95 of platform 86, thereby axially shifts out from valve body 12 when having prevented that valve rod 32 is subjected to hydrodynamic pressure in the valve body 12.Valve rod 32, seal element 70 and the seal cartridge 64 that cracks have constituted the level flame proection together one time, and seal cartridge 64 is in the groove 74 that seal element 70 forms because the bottom enlarged 40 of valve rod 32 greater than the hole 66 of the seal cartridge 64 that cracks, is cracked.

Preferably with reference to Fig. 3, the upper end portion of slotted liner bushing 96 forms an axially extended groove 102, and it is round the inboard of opening 98, is used for receiving the valve lever bushing 104 on the top 46 of the enlarged that is installed in valve rod 32.Round the inboard of opening 98, on the underpart of slotted liner bushing 96, also formed an axially extended groove 106, it is used for receiving the thrust-bearing 108 of the sealing on the enlarged top 46 that is installed in valve rod 32.

With reference to Fig. 1, the lever 110 that has formed a square opening 112 is installed in the square upper end of valve rod 32.One thrust washer 113 is installed on the valve rod 32 between lever 110 and valve rod support platform 86.One slit 114 extends to the relative end of lever 110 and its handle 116 from square hole 112.One socket screw 118 is inserted in the passage 120 of horizontal expansion of slit 114 and cooperates with a nut 122, thus size that can adjustment hole 112.The top thread engagement of locking nut 124 and valve rod 32 is fixed on lever 110 on the valve rod 32.

The lower end screw thread of stop pin 126 is installed in the hole 128 that forms on the top surface of platform 86, when turning to its closed position with convenient ball element 16 by being abutted against the rotation that limits valve rod 32 with lever 110.

Locking folder 130 can move axially along lever 110, so that engage with the respective slot 132 that forms on the top surface of platform 86, its objective is optionally valve 10 to be locked in to open or close the position.

Beginning the assembling stage of valve 10, at first the upstream extremity of downstream valve seat 20 by valve body 12 inserted in the valve body 12.After this, by valve stem passage 34 with valve lever bushing 56, bottom backward extrusion ring 60a, packing ring 58 and top backward extrusion ring 60b pack in the valve body 12 successively, then, the center hole 92 that valve rod 32 passes platform 86 inserts, seal element 70 and Belleville washer 76 slide axially on the lower end of valve rod 32, until middle small diameter portion 42.In case seal element 70 and Belleville washer 76 have been installed on the valve rod 32, the seal cartridge 64 that cracks also is in place on valve rod 32.Subsequently valve rod 32 is pushed valve stem passage 34 downwards, thereby the thrust-bearing 108 of sealing can be installed, slotted liner bushing 96 and valve lever bushing 104.At first the thrust-bearing 108 with sealing slides into the valve rod upper end, and leans against on the shoulder 86 up to it downwards.Then, slotted liner bushing 96 open and be installed to valve rod 32 around, then, valve lever bushing 104 is slided into the upper end of valve rod 32, enters downwards in the groove 102 of slotted liner bushing 96 formation.Installed on valve rod 32 after thrust-bearing 108, slotted liner bushing 96 and the valve lever bushing 104 of sealing, valve rod 32 is to top offset, its objective is with the annular flange flange 100 of slotted liner bushing 96 on the interior shoulder 95 that is resisted against platform 86 to dock.Upstream extremity by valve body 12 inserts ball element 16 in the valve body 12 then, and groove 38 is extended so that engage with the plane 36 of valve rod 32 bottoms in the direction of flow channel 14.After this, with upstream valve seat 22, loaded ring 26 is separated sleeve 28 and retaining ring 30 and is installed in the valve body 12 by the valve body upstream extremity, and the

bolt

84,86 of seal element is tightened.At last lever 110 is installed on the valve rod 32, fixing by locking nut 124.Stop pin 126 can be vertically fixed on the platform 86 at any time.

By as can be seen above-mentioned, slotted liner bushing 64 and 96 allows the valve rod 32 of one to be installed in the valve body 12 of single-piece by valve stem passage 34, shifts out vertically from valve body 12 when having prevented simultaneously that valve rod is subjected to hydrodynamic pressure.

One of advantage of above-mentioned high pressure valve 10 is that joint and the Sealing that becomes potential leakage paths eliminated in incorporate design.In addition, valve rod 32 is in the position away from valve body 12 outside packing, has guaranteed that like this thrust-bearing 108 of the sealing of low operation moment of torsion can not be subject to processing the Temperature Influence of fluid.This has just increased the life expectance of thrust-bearing 108 widely, thereby has increased the reliability of high pressure valve 10, and the protective gear that prevents the valve rod ejection is provided again simultaneously effectively.

Except above-mentioned advantage, platform 86 has guaranteed accurately aliging of valve rod 32 with 12 one-tenth whole designs of valve body of single-piece, thereby has prevented the too early wearing and tearing of valve rod packing.Valve rod 32 is guided in its bottom and upper end and has prevented the lateral load that may damage packing and then cause leaking.

Unshowned another embodiment according to the present invention, the lever edge is horizontal in the both sides of valve rod 32, and all is provided with handle at every end of lever.

Claims

1. high pressure valve comprises the valve body of single-piece, and this valve body defines a fluid passage along a flow axes; Also comprise a closure member, this closure member is in described valve body and a penetration hole arranged; A valve rod, it engages and extends to outside the valve stem passage that forms in valve body with closure member, be used between open position and closed position, rotating described closure member around a spin axis perpendicular to described flow axes, at open position, the fluid passage of described hole and described valve body is co-axially aligned, in closed position, described hole is in the horizontal expansion of described fluid passage; Be used to prevent along the sealing system of described valve stem passage from described valve body leakage; One prevents valve rod ejection protective system, and it comprises the platform that separates with described valve body, and formation aligns with described valve stem passage to receive the opening of the valve rod that passes through it, and described platform and described valve body are monolithic construction; On described valve rod, between described platform and described valve body, outside sealing system, also be provided with bearing means, it is used for cooperating with described platform, thereby prevents under the effect of described valve rod hydrodynamic pressure in valve body from described valve body ejection.

2. a kind of high pressure valve as claimed in claim 1 is characterized in that, described bearing means comprises against the periphery shoulder of valve rod and is installed in a lining on the described valve rod.

3. a kind of high pressure valve as claimed in claim 2 is characterized in that described lining splits, thereby allows described valve rod to be installed in the described valve body by the opening of described platform and described valve stem passage.

4. a kind of high pressure valve as claimed in claim 3 is characterized in that described valve rod has unitary body.

5. a kind of high pressure valve as claimed in claim 2, it is characterized in that, the described opening of described platform has a radially enlarged part and an adjacent part that radially reduces, the annular shoulder of the flange engages of between formation and described lining, under the effect that prevents hydrodynamic pressure in described valve body, described valve rod shifts out vertically from described valve body.

6. a kind of high pressure valve as claimed in claim 5, it is characterized in that, described lining defines a central opening, described central opening has the bottom, and radially enlarged and adjacent top radially reduce part, bottom radially enlarged is used to receive the lining that is installed on the described valve rod, and described top radially reduces part and is used to receive a thrust-bearing against the annular shoulder of described valve rod.

7. a kind of high pressure valve as claimed in claim 1, it is characterized in that, described sealing system is included in the described valve body, be installed in packing in the described valve stem passage round described valve rod, and in free space that is arranged between described platform and the described valve body, round a kind of seal element of described valve rod, it is used to compress described packing.

8. a kind of high pressure valve as claimed in claim 7, it is characterized in that, what described seal element defined that described valve rod passes through one extends axially the hole, described axially extended hole has a radially enlarged bottom that receives elastic device, described elastic device is round a seal cartridge that is installed on the described valve rod, and setover between butting surface and an interior butting surface outside of described seal cartridge, described seal cartridge contacts with described packing.

9. a kind of high pressure valve as claimed in claim 7; it is characterized in that; described valve rod has the bottom shoulder that is provided with outside described packing, described bottom shoulder is greater than the opening of the reception valve rod that forms in described seal cartridge, thereby a secondary protective gear that prevents the valve rod ejection is provided.

10. a kind of high pressure valve as claimed in claim 9 is characterized in that, installs for convenient, and described seal cartridge ftractures.

11. a kind of high pressure valve as claimed in claim 1 is characterized in that described platform comprises the elongated element of two side direction, described lateral member extends downwardly into the outer surface of described valve body by described platform, and in the both sides of described valve rod.