CN102734473B - Rotational-free self-sealing valve - Google Patents
Rotational-free self-sealing valve Download PDFInfo
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- CN102734473B CN102734473B CN201110120671.8A CN201110120671A CN102734473B CN 102734473 B CN102734473 B CN 102734473B CN 201110120671 A CN201110120671 A CN 201110120671A CN 102734473 B CN102734473 B CN 102734473B
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- valve
- valve rod
- sealing
- rod
- handle
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Abstract
The invention discloses a rotational-free self-sealing valve, which comprises a valve body provided with an inlet channel and an outlet channel, a valve cover, a valve rod, a valve plug, a handle and stuffing box packing, wherein the lower end of the handle is reversely matched with the valve cover via a thread; the valve cover is matched with the valve body via the thread; a containing cavity is arranged inside the handle; an adjusting bearing is arranged inside the containing cavity; an inner ring of an adjusting bearing is matched with the valve rod and fastened by a nut; the valve plug is positioned inside the inlet channel; and the valve plug is provided with a taper sealing surface which gradually reduces towards the direction of the valve rod, and the taper sealing surface is tightly matched with the annular taper surface inside the inlet channel. With the adoption of the rotational-free self-sealing valve structure disclosed by the invention, non-rotation of the valve rod can be achieved during vertical movement; mechanical wear between the stuffing box packing and a valve tip is reduced, and leakage is not easily generated. In addition, medium flows into the valve cavity from the lower part of the valve rod when being sealed, and is consistent with the movement direction of the valve rod; only friction force between the valve rod and the packing is overcome by operating force; the medium pressure becomes advantages of sealing the valve, and the larger the pressure is, the tighter the sealing is. Therefore, the sealing property of the valve is further improved, the service life is longer, and the rotational-free self-sealing valve is more suitable for pipeline control under middle and high pressure condition.
Description
[technical field]
The present invention relates to a kind of needle-valve, the Self-sealing valve without spin that particularly a kind of pipeline being mainly used under middle high-pressure condition is controlled.
[background technique]
Needle-valve belongs to a kind of of stop valve, is usually used in compared with small flow, and the pipeline of the gas of elevated pressures or liquid medium circulation is controlled.Valve point (being the needle plug that valve stem end is cone face) and the valve rod of existing needle-valve are generally one, mostly be line contact sealing, and the keying of valve directly drives stem movement by the rotation of handle, during this valve seal, must produce the phase mutual friction of sealing surface, and then cause stuffing box packing to be worn, especially cause scratch, the damage of valve point and valve seat, valve is produced poorly sealed, cause leaking.Valve opening and closing number of times is more, abrades manyly, and life of valve is shorter.
On the other hand, during existing needle-valve sealing, medium flows into valve pocket by valve rod below, with stem movement opposite direction, so must exert pressure to valve rod, with forced seal face, does not leak.Now, steering force need to overcome the frictional force of valve rod and filler and the thrust that pressure medium produces; The power of the force rate open valve of cut-off valve is large.Therefore, all higher to requirements such as the material of valve rod, size, intensity, hardness, cannot meet the long-term use under middle high-pressure condition.
[summary of the invention]
The object of the invention is to: overcome the deficiencies in the prior art, a kind of Self-sealing valve without spin that can meet the long-term use under middle high-pressure condition is provided, during this valve seal, valve rod can not produce rotation, can avoid rotating the wearing and tearing of the stuffing box packing causing, and valve plug sealing direction to consistent, reaches the tighter effect of the larger sealing of pressure medium with MEDIA FLOW.
The object of the present invention is achieved like this: it comprises valve body, valve gap, valve rod, valve plug, handle and the stuffing box packing that is provided with inlet/outlet passage, valve gap coordinates with valve body screw thread and locks with locking device, valve rod stretches in valve body, valve plug is located at the bottom of valve rod, valve rod inserts in handle through stuffing box packing and valve gap, its improvements are: the lower end of handle coordinates with valve gap left-hand thread, in handle, be provided with cavity volume, at described cavity volume, be built-in with adjusting bearing, regulate bearing inner race to coordinate with valve rod, the nut for fastening adjustment bearing inner race is installed on valve rod; Valve plug is the cylinder that top is provided with conical seal surface, and valve plug is positioned at inlet passage, is provided with the circular cone being sealed and matched with conical seal surface in inlet passage, and described conical seal surface dwindles gradually towards valve rod direction; On valve rod near conical seal surface place radially be concaved with tilted conical surface, the breach that described tilted conical surface forms on valve rod increases upward gradually;
In above-mentioned Self-sealing valve without spin, offer the safety relief passage being connected with inlet passage in described valve body, the outlet capping of safety relief passage has burst disk, and the clamp holder that clamps burst disk is installed on valve body;
In above-mentioned Self-sealing valve without spin, described clamp holder for offering the hollow structural component of some perforates, clamp holder and wall body screw-thread fit on wall body;
In above-mentioned Self-sealing valve without spin, on valve rod, nearly conical seal surface place inwardly offers tilted conical surface;
In above-mentioned Self-sealing valve without spin, the bottom surface of described cylinder offers groove;
In above-mentioned Self-sealing valve without spin, on valve rod between valve gap and stuffing box packing sheathed metallic shim;
In above-mentioned Self-sealing valve without spin, described locking device is lock nut.
Beneficial effect of the present invention is: adopt the structure of Self-sealing valve without spin of the present invention, can realize valve rod and not rotate when moving up and down, reduce the mechanical wear of stuffing box packing and valve point, be difficult for leaking; In addition, during sealing, medium flows into valve pocket by valve rod below, and consistent with stem movement direction, steering force only need overcome the frictional force of valve rod and filler, and pressure medium becomes the advantage of valve seal on the contrary, and pressure is larger, seals tighter.Therefore, the sealability of this valve has obtained further raising, and the life-span is longer, and the pipeline being more suitable under middle high-pressure condition is controlled; Safety relief passage and burst disk are set, can avoid pressure excessive and damage valve body, effectively improved Safety performance.
[accompanying drawing explanation]
Below in conjunction with accompanying drawing in detail concrete structure of the present invention is described in detail
Fig. 1 is the present invention's internal structure schematic diagram of Self-sealing valve without spin
Fig. 2 is the structural representation of stem lower portion
Fig. 3 is the sectional view of the A-A direction of view as shown in Figure 2
In figure: 1, jackscrew; 2, nut; 3, regulate bearing; 4, handle; 41, cavity volume; 5, valve gap; 6, valve body; 61, safety relief passage; 62, inlet passage; 63, outlet passage; 7, burst disk; 8, clamp holder; 9, valve rod; 91, valve plug; 92, conical seal surface; 93, cylinder; 94, groove; 95, tilted conical surface; 10, stuffing box packing; 11, metallic shim; 12, lock nut.
[embodiment]
As shown in Figure 1 to Figure 3, Self-sealing valve without spin of the present invention is mainly by regulating bearing 3, handle 4, valve gap 5, valve body 6, burst disk 7, clamp holder 8, valve rod 9, the compositions such as the valve plug 91 of valve rod 9 ends and lock nut 12, wherein, in valve body 6, be provided with can accommodating valve rod 9 valve pocket, inlet passage 62 and outlet passage 63, inlet passage 62 is connected with outlet passage 63 through valve pocket, the moving up and down in valve pocket by valve rod 9, can realize the keying of 91 pairs of valves of valve plug, and the other end of valve rod 9 inserts in handle 4 through stuffing box packing 10 and valve gap 5, valve gap 5 and valve body 6 screw-thread fit.In handle 4, offer the uncovered cavity volume in Yi Ge upper end 41, valve rod 9 upper ends are stretched in cavity volume 41, at cavity volume 41, be built-in with the adjusting bearing 3 being enclosed within on valve rod 6, regulate bearing 3 inner rings and valve rod 9 to closely cooperate, and in addition fastening with two nuts 2, cavity volume 41 accent screw threads are screwed into a jackscrew 1, to guarantee the normal use of handle 4.The lower end of handle 4 coordinates with the left-hand thread of valve gap 5 and the screw-thread fit of 6 of valve gap 5 and valve bodies, and while having guaranteed switching valve, valve rod 9 can move up and down in valve body 6 cavity volumes 41.Now, regulate the outer ring of bearing 3 to rotate with handle 4, but under the pressuring action of nut 2, with the valve rod 9 that regulates bearing 3 inner rings laminatings without spin.The sealing that described valve gap 5 and valve rod are 9 is laminated and is formed by a metallic shim 11 and two stuffing box packing 10.Meanwhile, for guaranteeing closely cooperating of 6 of valve gap 5 and valve bodies, at the two screw-thread fit place, be provided with a lock nut 12, to avoid filler loosening.Valve rod 9 is integral structures with valve plug 91, as Fig. 2 knows expression, in the present embodiment, for guaranteeing the sealability of valve, the valve plug 91 of valve rod 9 bottoms is made to the cylinder 93 that top is provided with conical seal surface 92, conical seal surface 92 dwindles gradually towards valve rod 9 directions, and conical seal surface 92 Outside diameters are identical with cylinder 93.Valve plug 91 is positioned at inlet passage 62, in inlet passage 62, be provided with the circular cone being sealed and matched with conical seal surface 92, during valve closing, clockwise rotate handle 4, band ovable valve stem 9 moves up, and conical seal surface 92 seals with closed formation of circular cone, medium flows into valve pocket from inlet passage 62 by valve rod 9 belows, the pressure of medium is consistent with the movement direction that valve rod 9 makes progress, and pressure is larger, and the sealing that valve plug and valve body are 6 is tighter.For guaranteeing the Security of valve, in valve body 6, offer the safety relief passage 61 being connected with inlet passage 62, the outlet capping of safety relief passage 61 has burst disk 7, and burst disk 7 is compressed by the clamp holder 8 with valve body 6 screw-thread fit.Clamp holder 8 is for offer the hollow structural component of some perforates on wall body, and when pressure in valve body 6 is excessive, medium can puncture burst disk 7 and outwards release from the tapping of clamp holder 8, has avoided the damage of valve body 6.It should be noted that valve is when closed state, cylinder 93 parts of valve plug 91 should not covered the entrance of safety relief passage 61, guarantee that safety relief passage 61 is connected with inlet passage 62, really to play the effect of releasing.
In the present embodiment, for guaranteeing the smooth installation of valve rod 9, at described cylinder 93 bottom end faces, be provided with " yi word pattern " groove 94, so that the location of assistant tool.
In the present embodiment, for guaranteeing smoothness and the flow adjustability of circulation medium in valve, on described valve rod 9, described in distance, the about 2mm At The Height of conical seal surface is arranged with two tilted conical surfaces 95 with central axis, and the breach that tilted conical surface 95 forms on valve rod 9 increases upward gradually.In valve body 6, circular cone extends upward one section of vertical slideway, and this section of valve rod 9 from the section start of tilted conical surface 95 to the conical seal surface 92 of valve plug 91 is slidably matched with vertical slideway.By moving up and down of valve rod 9, the size of formed free air space between the adjustable breach being formed by tilted conical surface 95 and vertically slideway, thus reach the object of Flow-rate adjustment.
The valve rod 9 of the Self-sealing valve without spin that this is novel does not rotate, can only vertical motion, avoided to maximum constraints the scratch causing due to spin friction, reduced the wearing and tearing of stuffing box packing and valve plug 91, valve seat, reached and be difficult for leakage and extend the valve object in working life.In addition, valve rod 9 moving direction while also having changed sealing, make MEDIA FLOW moving direction when with valve rod 9 sealing consistent, and the pressure of medium has strengthened the sealing force of valve rod 9, and pressure is larger, seals tighter.Also reduced the steering force applying to valve rod 9, the pipeline being therefore more suitable under middle high-pressure condition is controlled simultaneously.
Described above is only preferred embodiment of the present invention, the invention is not restricted to above-mentioned mode of execution, any retouching that all those of ordinary skill in the art make according to above description, revises or is equal to replacement, all belongs to the scope that the present invention protects.
Claims (6)
1. a Self-sealing valve without spin, it comprises valve body, valve gap, valve rod, valve plug, handle and the stuffing box packing that is provided with inlet/outlet passage, valve gap coordinates with valve body screw thread and locks with locking device, valve rod stretches in valve body, valve plug is located at the bottom of valve rod, valve rod inserts in handle through stuffing box packing and valve gap, it is characterized in that: the lower end of handle coordinates with valve gap left-hand thread, in handle, be provided with cavity volume, at described cavity volume, be built-in with adjusting bearing, regulate bearing inner race to coordinate with valve rod, the nut for fastening adjustment bearing inner race is installed on valve rod; Valve plug is the cylinder that top is provided with conical seal surface, and valve plug is positioned at inlet passage, is provided with the circular cone being sealed and matched with conical seal surface in inlet passage, and described conical seal surface dwindles gradually towards valve rod direction; On valve rod near conical seal surface place radially be concaved with tilted conical surface, the breach that described tilted conical surface forms on valve rod increases upward gradually.
2. Self-sealing valve without spin according to claim 1, is characterized in that: in valve body, offer the safety relief passage being connected with inlet passage, the outlet capping of safety relief passage has burst disk, and the clamp holder that clamps burst disk is installed on valve body.
3. Self-sealing valve without spin according to claim 2, is characterized in that: clamp holder for offering the hollow structural component of some perforates on wall body, and clamp holder coordinates with valve body screw thread.
4. Self-sealing valve without spin according to claim 1, is characterized in that: the bottom surface of described cylinder offers groove.
5. Self-sealing valve without spin according to claim 1, is characterized in that: on valve rod between valve gap and stuffing box packing sheathed metallic shim.
6. Self-sealing valve without spin according to claim 1, is characterized in that: described locking device is lock nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110120671.8A CN102734473B (en) | 2011-03-29 | 2011-05-10 | Rotational-free self-sealing valve |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120094198.6 | 2011-03-29 | ||
| CN201120094198 | 2011-03-29 | ||
| CN201110120671.8A CN102734473B (en) | 2011-03-29 | 2011-05-10 | Rotational-free self-sealing valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102734473A CN102734473A (en) | 2012-10-17 |
| CN102734473B true CN102734473B (en) | 2014-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110120671.8A Expired - Fee Related CN102734473B (en) | 2011-03-29 | 2011-05-10 | Rotational-free self-sealing valve |
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| CN (1) | CN102734473B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103410999A (en) * | 2013-05-22 | 2013-11-27 | 麦特汽车服务股份有限公司 | Method for achieving purpose for regulating rates of flow precisely through flow control valve |
| CN105333177A (en) * | 2015-11-25 | 2016-02-17 | 江苏华太电力仪表有限公司 | Explosion-proof needle valve |
| CN109854559A (en) * | 2018-12-07 | 2019-06-07 | 中国航空工业集团公司金城南京机电液压工程研究中心 | A kind of parallel spring safety valve of low frequency response |
| CN110513500A (en) * | 2019-09-24 | 2019-11-29 | 沅亨流体科技（昆山）有限公司 | A kind of through type needle-valve |
| CN114623250B (en) * | 2022-03-20 | 2023-04-25 | 东北石油大学 | Anti-blocking throttle valve convenient to clean |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3761053A (en) * | 1969-10-01 | 1973-09-25 | Sno Trik Co | High pressure valve |
| FR2640020A3 (en) * | 1988-12-05 | 1990-06-08 | Voisin Michel | Anti-leak tap with inverted cones |
| CN1299021A (en) * | 1999-12-06 | 2001-06-13 | 郝思宏 | Environment protection type low-torque high-temp. high-pressure cut-off valve |
| CN200999916Y (en) * | 2007-01-24 | 2008-01-02 | 陈秀玉 | CO2 container valve |
| CN201145043Y (en) * | 2008-01-22 | 2008-11-05 | 江苏盐电阀门有限公司 | Stop valve |
| CN201531616U (en) * | 2009-09-23 | 2010-07-21 | 浙江方顿仪表阀门有限公司 | Needle valve with locking device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0979387A (en) * | 1995-09-08 | 1997-03-25 | Toyota Autom Loom Works Ltd | Poppet valve |
-
2011
- 2011-05-10 CN CN201110120671.8A patent/CN102734473B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3761053A (en) * | 1969-10-01 | 1973-09-25 | Sno Trik Co | High pressure valve |
| FR2640020A3 (en) * | 1988-12-05 | 1990-06-08 | Voisin Michel | Anti-leak tap with inverted cones |
| CN1299021A (en) * | 1999-12-06 | 2001-06-13 | 郝思宏 | Environment protection type low-torque high-temp. high-pressure cut-off valve |
| CN200999916Y (en) * | 2007-01-24 | 2008-01-02 | 陈秀玉 | CO2 container valve |
| CN201145043Y (en) * | 2008-01-22 | 2008-11-05 | 江苏盐电阀门有限公司 | Stop valve |
| CN201531616U (en) * | 2009-09-23 | 2010-07-21 | 浙江方顿仪表阀门有限公司 | Needle valve with locking device |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平9-79387A 1997.03.25 |
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| CN102734473A (en) | 2012-10-17 |
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Granted publication date: 20140115 Termination date: 20160510 |
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