CN104989834B - Valve plug of drain valve component and drain valve - Google Patents

Valve plug of drain valve component and drain valve Download PDF

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Publication number
CN104989834B
CN104989834B CN201510449959.8A CN201510449959A CN104989834B CN 104989834 B CN104989834 B CN 104989834B CN 201510449959 A CN201510449959 A CN 201510449959A CN 104989834 B CN104989834 B CN 104989834B
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CN
China
Prior art keywords
valve
seat
packing
plug
filler
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Active
Application number
CN201510449959.8A
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Chinese (zh)
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CN104989834A (en
Inventor
王庭铨
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Individual
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Individual
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/42—Valve seats
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F16K1/38—Valve members of conical shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K41/00—Spindle sealings
    • F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/04—Means in valves for absorbing fluid energy for decreasing pressure or noise level, the throttle being incorporated in the closure member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16T—STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS
    • F16T1/00—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers
    • F16T1/38—Component parts; Accessories
    • F16T1/383—Valve closing members or valve seats

Abstract

The invention discloses a kind of core assembly, especially a kind of high pressure drain valve core assembly.The invention provides a kind of mitigation sealing surface by the valve plug of drain valve component washed away, including valve element and valve seat, the generally up big and down small cyclic structure of the valve seat, the top of valve seat inner ring surface is the sealing surface of cone, and the bottom of valve seat inner ring surface is anchor ring；The valve element is cylindric, and valve element can seal with the sealing surface of valve seat to be coordinated；Also include columned valve plug, the valve plug is arranged on valve element bottom and coaxial with valve element, and the size of the valve plug matches with the anchor ring of valve seat；When valve element and valve base sealing coordinate, in the anchor ring of valve plug insertion valve seat, the cushion space of one is formed between valve element, valve seat and valve plug；In addition, there is one of annular groove on valve plug.The primary sealing area of the present invention will not be washed away by strong, and its life-span is much larger than traditional valve.

Description

Valve plug of drain valve component and drain valve
Technical field
The present invention relates to a kind of core assembly, especially a kind of high pressure drain valve core assembly.Moreover, it relates to A kind of drain valve, especially a kind of high pressure drain valve.
Background technology
Drain valve is the valve that condensate is excluded for jet chimney；At present, used in power plant steam pipe system Valve generally existing it is serious in leak, the problem of service life is short, its structure is common cut-out structure, only considered valve sheet The break-in facility of body, protected without reducing pressure by regulating flow structural measure, the problems such as have ignored cavitation, cavitation, vibration, noise, cause valve Leakage is serious in door, influences efficiency of generating unit.
The drain valve used at present, it is coordinated using the sealing between valve element and valve seat realizes sealing, but said structure In the environment of high pressure, when valve is in the moment of keying, flow area is especially small, and velocity of medium is high and pressure drastically declines, close Front cover is washed away by high-velocity fluid, and produces cavitation phenomenons, causes sealing surface blow loss, and pole causes valve to fit badly, in generation Leakage.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of mitigation sealing surface by the valve plug of drain valve component washed away.
The generally up big and down small cyclic structure of the valve seat, the top of valve seat inner ring surface are the sealing surface of cone, valve The bottom of seat inner ring surface is anchor ring；
The valve element is cylindric, and the sealing surface sealing of valve element and valve seat coordinates；
Also include columned valve plug, the valve plug is arranged on valve element bottom and, the size of the valve plug coaxial with valve element Matched with the anchor ring of valve seat；
When valve element and valve base sealing coordinate, in the anchor ring of valve plug insertion valve seat, formed between valve element, valve seat and valve plug One annular cushion space.
It is further that at least one of annular groove is provided with the valve plug, when valve element and valve base sealing cooperation, institute There is annular groove to enter in the anchor ring of valve seat.
It is further that the cross section of the cushion space is right angled triangle.
It is further the sealed end chamfering of the valve element coning sealing inclined-plane, when valve element and valve base sealing are matched somebody with somebody During conjunction, primary sealing area is complemented each other to form in the sealing surface of the sealing inclined-plane and valve seat.
It is further that the bottom of the valve plug is cone.
Another technical problems to be solved of the invention are to provide a kind of light sealing surface by the drain valve washed away.
Drain valve provided by the invention, including valve body, core assembly, valve rod and packing seal structure, set in the valve body Valve pocket, import, the packing cavity for exporting and being communicated to valve pocket are equipped with, the core assembly is arranged in valve body, and the filler is close Seal structure is arranged in the packing cavity of valve body, and the valve rod is penetrated into valve pocket by packing seal structure；The core assembly Using foregoing valve plug of drain valve component.
It is further that the packing seal structure includes filler packing, filler pressing sleeve, gland and Packing seat, institute State and packing cavity is provided with valve body, the Packing seat, filler packing, filler pressing sleeve, gland are sequentially arranged at from down to up In packing cavity, the valve rod enters valve pocket through gland, filler pressing sleeve, filler packing and Packing seat；Gland, filler Gland, filler packing, Packing seat are bolted and are pressed in packing cavity, the Packing seat in a tubular form, along axle on the inwall of Packing seat To offering at least two annular grooves.
The beneficial effects of the invention are as follows：By setting up big and down small valve seat so that the primary sealing area position of valve element and valve seat At the upper cone shape of valve seat, away from the valve seat bottom anchor ring as medium channel；Simultaneously as the presence of valve plug, valve An annular cushion space is formed between core, valve seat and valve plug, along with one of annular groove on valve plug, two level is formed and expands Hold decompression space；When valve element is just opened, primary sealing area is first opened, and high-pressure medium initially enters cushion space, is then being passed through The throttling of valve plug so that primary sealing area only has a small amount of medium and passed through；When valve element is opened completely, valve plug completely disengages valve seat bottom Anchor ring, now primary sealing area is away from medium channel, therefore either which kind of state, primary sealing area of the invention all without Washed away by strong, its life-span is much larger than traditional valve.
Brief description of the drawings
Fig. 1 is the structural representation of drain valve；
Fig. 2 is schematic diagram when core assembly is fully closed；
Schematic diagram when Fig. 3 is core assembly throttle；
Schematic diagram when Fig. 4 is core assembly standard-sized sheet；
Fig. 5 is the schematic diagram of packing seal structure；
Parts, position and numbering in figure：Valve element 1, valve seat 2, valve plug 3, cushion space 4, valve body 5, valve rod 6, filler are close Seal structure 7, annular groove 8, sealing surface 11, anchor ring 12, filler packing 71, filler pressing sleeve 72, gland 73, Packing seat 74。
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
As shown in figure 1, the present invention includes valve element 1 and valve seat 2,
The generally up big and down small cyclic structure of the valve seat 2, the top of the inner ring surface of valve seat 2 is conical sealing surface 11, the bottom of the inner ring surface of valve seat 2 is anchor ring 12, and anchor ring 12 is coaxially disposed with the medium channel in valve pocket；
The valve element 1 is cylindric, and valve element 1 can seal with the sealing surface 11 of valve seat 2 to be coordinated；
Also include columned valve plug 3, the valve plug 3 is arranged on the bottom of valve element 1 and coaxial with valve element 1, the valve plug 3 Size matches with the anchor ring 12 of valve seat 2, and valve plug 3 can form the effect of throttling after anchor ring 12 and medium channel is inserted into Fruit；
When valve element 1 and the sealing of valve seat 2 coordinate, valve plug 3 is inserted in the anchor ring 12 of valve seat 2, valve element 1, valve seat 2 and valve plug An annular cushion space 4 is formed between 3.
Said structure is as follows in the service condition of reality：
Medium flow direction is high in and low out.
State shown in Fig. 2 is full off state, and the sealing of sealing surface 11 of valve element 1 and valve seat 2 coordinates, valve element 1, the and of valve seat 2 An annular cushion space 4 is formed between valve plug 3.
State shown in Fig. 3 is throttle, i.e., when valve element 1 is just opened, primary sealing area is first opened, and high-pressure medium flows into Dilatation, decompression in cushion space 4, while valve plug 3 does not leave anchor ring 12, because valve plug 3 can play a part of throttling, makes It is few that the high-pressure medium of the primary sealing area of valve element 1 and valve seat 2 must be flowed through, medium is greatly reduced and primary sealing area is washed away, So that the life-span of core assembly is greatly improved.
State shown in Fig. 4 is full-gear, and now valve plug 3 completely disengages anchor ring 12, and the sealing surface of valve seat is located at valve At the upper cone shape of seat, away from the valve seat bottom anchor ring 12 as medium channel, the sealing surface of valve element is also away from Jie Matter passage, and the medium channel exactly most fast place of flow velocity in valve pocket, in this way, primary sealing area it also avoid it is larger wash away, So that the life-span of core assembly greatly improves.
In order to realize multilevel decompression, as shown in Fig. 2 at least one of annular groove 8 is provided with the valve plug 3, when valve element 1 When sealing cooperation with valve seat 2, all annular grooves can enter in the anchor ring 12 of valve seat 2.When the fully closed no leakage current of valve, valve Plug 3 does not act on；When primary sealing area fits badly leakage current, leakage initially enters cushion space 4, realizes that one-level dilatation is depressured, so Cylindrical valve plug 3 carries out choked flow, while the two-step throttle groove that the annular groove 8 on valve plug 3 is formed afterwards, passes through throttling, dilatation, drop Pressure, prevent leakage current amount from further expanding, valve sealing face is not washed away further.This structure can cause primary sealing area to have Avoid continuous erosion during minor issue and leakage so that the service life of whole valve is further improved.In view of in valve pocket Space is limited, and general annular groove is set together.
Specifically, as shown in Fig. 2 the cross section of the cushion space 4 is right angled triangle.The right angle of right angled triangle exists The intersection of valve element 1 and valve plug 3.The benefit of this right angled triangle is as follows, and high-pressure medium enters cushion space 4 along hypotenuse, Convolution is formed under the guiding of right-angle side, so as to reach the purpose of convolution energy dissipating, there is certain antihypertensive effect.
Specifically, as shown in Figures 2 to 4, the sealed end chamfering of the valve element 1 coning sealing inclined-plane, when valve element 1 When sealing cooperation with valve seat 2, primary sealing area is complemented each other to form in the sealing surface 11 of the sealing inclined-plane and valve seat 2.
In order to realize the function of guiding, as shown in Fig. 2 the bottom of the valve plug 3 is cone.The bottom of the cone of valve plug 3 Portion can realize guide function, be easy to valve plug 3 to be inserted into the anchor ring 12 of valve seat 2.
The structure that foregoing core assembly applies in drain valve is shown in Figure 1, including valve body 5, core assembly, valve rod 6 and packing seal structure 7, valve pocket, import, the packing cavity for exporting and being communicated to valve pocket, the valve are provided with the valve body 5 Core assembly is arranged in valve body 5, and the packing seal structure 7 is arranged in the packing cavity of valve body 5, and the valve rod 6 passes through filler Sealing structure 7 is penetrated into valve pocket；Valve element 1 is connected with the bottom of valve rod 6, and the fortune of valve element 1 can be controlled by the motion of valve rod 6 Dynamic, valve seat 2 is placed in valve pocket and corresponding with outlet.The operation principle and effect of core assembly referring to foregoing, valve it is other Operation principle is identical with the drain valve of routine.
In order to increase the sealing reliability of valve rod 6 and filler packing, as shown in figure 5, the packing seal structure 7 includes filling out Charging tray root 71, filler pressing sleeve 72, gland 73 and Packing seat 74, are provided with packing cavity on the valve body, the Packing seat 74, Filler packing 71, filler pressing sleeve 72, gland 73 are sequentially arranged in packing cavity from down to up, and the valve rod 6 passes through filler Gland 73, filler pressing sleeve 72, filler packing 71 and Packing seat 74 enter valve pocket；Finally, gland 73, filler pressing sleeve 72, fill out Charging tray root 73, Packing seat 74 are bolted and are tightly pressed in packing cavity.The Packing seat 74 in a tubular form, the inwall of Packing seat 74 On offer at least two annular grooves vertically.Filler packing 71, filler pressing sleeve 72, gland 73 and traditional filler are close Simultaneously indifference is sealed, it makes gland 73 apply pressure so that the compression filler of filler pressing sleeve 72 packing 71, is filled out by bolt The height of charging tray root 71 diminishes, radius becomes big, so as to adjust the sealing effectiveness of filler packing 71.The material one of filler packing 71 As be graphite.
Valve pressure is higher, and the clamp force needed for filler packing 71 is bigger, and medium is more to washing away for filler packing 71, The abrasion of valve rod 6 and filler packing 71 is also more；And present invention uses Packing seat 74, when medium flows through Packing seat 74 first During annular groove, by throttling, speedup, dilatation, a reducing pressure by regulating flow process is completed, then repeats previous process；Work as Jie When mass flow is through 74 second annular grooves of Packing seat, a pressure reduction is completed again, is depressured by multi-level throttle, reach packing box Pressure medium has reduced much during root 71, thus mitigates the clamp force needed for filler packing 71, decreases medium to filling out Charging tray root 71 washes away, so as to extend filler service life.

Claims (6)

1. valve plug of drain valve component, including valve element (1) and valve seat (2), it is characterised in that：
The generally up big and down small cyclic structure of the valve seat (2), the top of valve seat (2) inner ring surface is conical sealing surface (11), the bottom of valve seat (2) inner ring surface is anchor ring (12)；
The valve element (1) is cylindric, and sealing surface (11) sealing of valve element (1) and valve seat (2) coordinates；
Also include columned valve plug (3), the valve plug (3) be arranged on valve element (1) bottom and with valve element (1) coaxially, the valve The size of plug (3) matches with the anchor ring (12) of valve seat (2)；
When valve element (1) and valve seat (2) sealing coordinate, in the anchor ring (12) of valve plug (3) insertion valve seat (2), valve element (1), valve An annular cushion space (4) is formed between seat (2) and valve plug (3)；
At least one of annular groove (8) is provided with the valve plug (3), when valve element (1) and valve seat (2) sealing cooperation, is owned Annular groove (8) can enter in the anchor ring (12) of valve seat (2).
2. valve plug of drain valve component as claimed in claim 1, it is characterised in that：The cross section of the cushion space (4) is straight Angle triangle.
3. valve plug of drain valve component as claimed in claim 1, it is characterised in that：The sealed end chamfering of the valve element (1) is formed Conical sealing inclined-plane, when valve element (1) and valve seat (2) sealing cooperation, in the sealing inclined-plane and the sealing surface (11) of valve seat (2) Complement each other to form primary sealing area.
4. the valve plug of drain valve component as described in claims 1 to 3 any claim, it is characterised in that：The valve plug (3) Bottom is cone.
5. drain valve, including valve body (5), core assembly, valve rod (6) and packing seal structure (7), the valve body (5) is interior to be set There are valve pocket, import, the packing cavity for exporting and being communicated to valve pocket, the core assembly is arranged in valve body (5), and the filler is close Seal structure (7) is arranged in the packing cavity of valve body (5), and the valve rod (6) is penetrated into valve pocket by packing seal structure (7)； It is characterized in that：The core assembly is using the valve plug of drain valve component as described in Claims 1-4 any claim.
6. drain valve as claimed in claim 5, it is characterised in that：The packing seal structure (7) include filler packing (71), Filler pressing sleeve (72), gland (73) and Packing seat (74), are provided with packing cavity on the valve body, the Packing seat (74), Filler packing (71), filler pressing sleeve (72), gland (73) are sequentially arranged in packing cavity from down to up, the valve rod (6) Enter valve pocket through gland (73), filler pressing sleeve (72), filler packing (71) and Packing seat (74)；Gland, filler Gland, filler packing, Packing seat are bolted and are pressed in packing cavity, the Packing seat (74) in a tubular form, Packing seat (74) it is interior At least two annular grooves (8a) are offered on wall vertically.
CN201510449959.8A 2015-07-28 2015-07-28 Valve plug of drain valve component and drain valve Active CN104989834B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510449959.8A CN104989834B (en) 2015-07-28 2015-07-28 Valve plug of drain valve component and drain valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510449959.8A CN104989834B (en) 2015-07-28 2015-07-28 Valve plug of drain valve component and drain valve

Publications (2)

Publication Number Publication Date
CN104989834A CN104989834A (en) 2015-10-21
CN104989834B true CN104989834B (en) 2018-01-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510449959.8A Active CN104989834B (en) 2015-07-28 2015-07-28 Valve plug of drain valve component and drain valve

Country Status (1)

Country Link
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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204784783U (en) * 2015-07-28 2015-11-18 王庭铨 Trap case subassembly and trap

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB766637A (en) * 1953-05-21 1957-01-23 Stanley William Hoskins Improved stop valves
CN2115431U (en) * 1991-12-11 1992-09-09 富阳电动仪表厂 Choke length change type regulating valve
CN2222834Y (en) * 1995-03-15 1996-03-20 林文政 Stop valve
CN201237002Y (en) * 2008-07-29 2009-05-13 沈阳三三牌阀门制造有限责任公司 High-pressure steam break valve with valve body adopting split structure
CN202646742U (en) * 2012-07-09 2013-01-02 浙江中正阀门有限公司 High-pressure accumulation-proof throttling stop valve
CN203442472U (en) * 2013-09-15 2014-02-19 西安秦申特种调节阀有限责任公司 Main steam trap

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204784783U (en) * 2015-07-28 2015-11-18 王庭铨 Trap case subassembly and trap

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