CN104989834A - Valve element component of drain valve and drain valve - Google Patents
Valve element component of drain valve and drain valve Download PDFInfo
- Publication number
- CN104989834A CN104989834A CN201510449959.8A CN201510449959A CN104989834A CN 104989834 A CN104989834 A CN 104989834A CN 201510449959 A CN201510449959 A CN 201510449959A CN 104989834 A CN104989834 A CN 104989834A
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- CN
- China
- Prior art keywords
- valve
- packing
- seat
- spool
- plug
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- 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
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- 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
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- 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
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- 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
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- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
- Details Of Valves (AREA)
Abstract
The invention discloses a valve element component, in particular to a valve element component of a high-pressure drain valve. The invention provides the valve element component of the drain valve, and the valve element component is used for relieving scouring to a sealed surface. The valve element component comprises a valve element and a valve seat, wherein the valve seat is integrally of an annular structure which is larger in the upper part and smaller in the lower part; the upper part of the inner annular surface of the valve seat is a conical sealed surface; the lower part of the inner annular surface of the valve seat is an annular surface; the valve element is cylindrical; and the valve element can be in sealed match with the sealed surface of the valve seat. The valve element component further comprises a cylindrical valve plug; the valve plug is arranged on the bottom part of the valve element and is coaxial with the valve element; the valve plug is matched with the annular surface of the valve seat in size; when the valve element is matched with the valve seat, the valve plug is inserted into the annular surface of the valve seat, so that an annular buffer space is formed among the valve element, the valve seat and the valve plug; and moreover, an annular groove is formed in the valve plug. According to the invention, the main sealed surface cannot be fiercely scoured, so that the service life of the drain valve disclosed by the invention is much longer than that of a traditional valve.
Description
Technical field
The present invention relates to a kind of mangetic core assembly, especially a kind of high pressure drain valve mangetic core assembly.In addition, the invention still further relates to a kind of drain valve, especially a kind of high pressure drain valve.
Background technique
Drain valve is the valve getting rid of water of condensation for steam line; At present; leak in the valve ubiquity used in power station steam pipe system is serious; the problem that working life is short; its structure is common cut-out structure; only considered the break-in facility of valve itself, do not have reducing pressure by regulating flow structural measure to protect, have ignored the problems such as cavitation, cavitation, vibration, noise; cause valves leakage serious, affect unit generation efficiency.
The drain valve of current employing, it utilizes being sealed and matched between spool and valve seat to realize sealing, but said structure is under the environment of high pressure, when the moment that valve is opening and closing, Flow area is little especially, velocity of medium is high and pressure sharply declines, sealing surface is subject to washing away of high-velocity fluid, and produces cavitation phenomenons, causes sealing surface blow loss, pole causes valve to fit badly, and leaks in producing.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of valve plug of drain valve assembly alleviating sealing surface and washed away.
Described valve seat entirety is up big and down small ring structure, and the top of valve seat inner ring surface is conical sealing surface, and the bottom of valve seat inner ring surface is toroidal surface;
Described spool is cylindric, and the sealing surface of spool and valve seat is sealed and matched;
Also comprise columned valve plug, described valve plug to be arranged on bottom spool and coaxial with spool, and the size of described valve plug is mated with the toroidal surface of valve seat;
When spool coordinates with valve base sealing, valve plug inserts in the toroidal surface of valve seat, spool, the buffer space that between valve seat and valve plug, formation one is annular.
Further, described valve plug is provided with at least one annular groove, when spool coordinates with valve base sealing, all annular grooves all can enter in the toroidal surface of valve seat.
Further, the cross section of described buffer space is right-angled triangle.
Further, the sealed end chamfering of described spool forms conical sealing inclined-plane, when spool coordinates with valve base sealing, complements each other to form primary sealing area at the sealing surface of sealing inclined-plane and valve seat.
Further, the bottom of described valve plug is conical.
Another technical problem that will solve of the present invention is to provide the drain valve that a kind of light sealing surface is washed away.
Drain valve provided by the invention, comprise valve body, mangetic core assembly, valve rod and packing seal structure, be provided with valve pocket, import in described valve body, export and be communicated to the packing cavity of valve pocket, described mangetic core assembly is arranged in valve body, described packing seal structure is arranged in the packing cavity of valve body, and described valve rod penetrates in valve pocket by packing seal structure; Described mangetic core assembly adopts aforesaid valve plug of drain valve assembly.
Be further, described packing seal structure comprises filler packing, filler pressing sleeve, Gland and Packing seat, described valve body is provided with packing cavity, described Packing seat, filler packing, filler pressing sleeve, Gland are arranged in packing cavity from down to up successively, and described valve rod enters valve pocket through Gland, filler pressing sleeve, filler packing and Packing seat; Gland, filler pressing sleeve, filler packing, Packing seat are pressed in packing cavity by bolt, and described Packing seat in a tubular form, the inwall of Packing seat offers at least two annular grooves vertically.
The invention has the beneficial effects as follows: by arranging up big and down small valve seat, making the primary sealing area of spool and valve seat be positioned at the upper cone shape place of valve seat, away from the valve seat bottom toroidal surface as medium channel; Meanwhile, due to the existence of valve plug, spool, the buffer space that between valve seat and valve plug, formation one is annular, add one annular groove on valve plug, forms secondary dilatation step-down space; When spool is just opened, primary sealing area is first opened, and first high-pressure medium enters buffer space, then in the throttling through valve plug, makes primary sealing area only have a small amount of medium to pass through; When spool is opened completely, valve plug departs from valve seat bottom toroidal surface completely, and now primary sealing area is away from medium channel, and no matter be therefore which kind of state, primary sealing area of the present invention all can not be subject to strong washing away, and its life-span is much larger than traditional valve.
Accompanying drawing explanation
Fig. 1 is the structural representation of drain valve;
Schematic diagram when Fig. 2 is mangetic core assembly complete shut-down;
Schematic diagram when Fig. 3 is mangetic core assembly throttle;
Schematic diagram when Fig. 4 is mangetic core assembly standard-sized sheet;
Fig. 5 is the schematic diagram of packing seal structure;
Component, position and numbering in figure: spool 1, valve seat 2, valve plug 3, buffer space 4, valve body 5, valve rod 6, packing seal structure 7, annular groove 8, sealing surface 11, toroidal surface 12, filler packing 71, filler pressing sleeve 72, Gland 73, Packing seat 74.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1, the present invention includes spool 1 and valve seat 2,
Described valve seat 2 entirety is up big and down small ring structure, and the top of valve seat 2 inner ring surface is conical sealing surface 11, and the bottom of valve seat 2 inner ring surface is toroidal surface 12, and toroidal surface 12 is coaxially arranged with the medium channel in valve pocket;
Described spool 1 is cylindric, and spool 1 can be sealed and matched with the sealing surface 11 of valve seat 2;
Also comprise columned valve plug 3, described valve plug 3 to be arranged on bottom spool 1 and coaxial with spool 1, and the size of described valve plug 3 is mated with the toroidal surface 12 of valve seat 2, and valve plug 3 can form the effect of throttling after being inserted into toroidal surface 12 and medium channel;
When spool 1 is sealed and matched with valve seat 2, valve plug 3 inserts in the toroidal surface 12 of valve seat 2, spool 1, the buffer space 4 that between valve seat 2 and valve plug 3, formation one is annular.
Said structure is as follows in the service condition of reality:
MEDIA FLOW is to being high in and low out.
State shown in Fig. 2 is full off state, and spool 1 is sealed and matched with the sealing surface 11 of valve seat 2, spool 1, the buffer space 4 that between valve seat 2 and valve plug 3, formation one is annular.
State shown in Fig. 3 is throttle, namely when spool 1 is just opened, primary sealing area is first opened, high-pressure medium flows into dilatation in buffer space 4, step-down, valve plug 3 does not leave toroidal surface 12 simultaneously, because valve plug 3 can play the effect of throttling, makes the high-pressure medium of the primary sealing area flowing through spool 1 and valve seat 2 few, greatly reduce medium washing away primary sealing area, the life-span of mangetic core assembly is greatly improved.
State shown in Fig. 4 is full-gear, now valve plug 3 departs from toroidal surface 12 completely, the sealing surface of valve seat is positioned at the upper cone shape place of valve seat, away from the valve seat bottom toroidal surface 12 as medium channel, the sealing surface of spool is also away from medium channel, and the medium channel place that flow velocity is the fastest in valve pocket exactly, so, primary sealing area it also avoid larger washing away, and the life-span of mangetic core assembly is improved greatly.
In order to realize multilevel decompression, as shown in Figure 2, described valve plug 3 is provided with at least one annular groove 8, when spool 1 is sealed and matched with valve seat 2, all annular grooves all can enter in the toroidal surface 12 of valve seat 2.When valve complete shut-down is without leakage current, valve plug 3 is effect not; When primary sealing area fits badly leakage current, first leakage enters buffer space 4, realize one-level dilatation step-down, then cylindrical valve plug 3 carries out choked flow, the two-step throttle groove that annular groove 8 simultaneously on valve plug 3 is formed, by throttling, dilatation, step-down, stop leakage current amount to expand further, valve sealing face is not washed away further.This structure can make primary sealing area have during minor issue and avoid continuous erosion and leakage, and the working life of whole valve is further improved.In view of limited space in valve pocket, general annular groove is arranged together.
Concrete, as shown in Figure 2, the cross section of described buffer space 4 is right-angled triangle.The right angle of right-angled triangle is at the intersection of spool 1 with valve plug 3.The benefit of this right-angled triangle is as follows, and high-pressure medium enters buffer space 4 along hypotenuse, under the guiding of right angle side, form convolution, thus reaches the object of convolution energy dissipating, has certain antihypertensive effect.
Concrete, as shown in Figures 2 to 4, the sealed end chamfering of described spool 1 forms conical sealing inclined-plane, when spool 1 is sealed and matched with valve seat 2, complements each other to form primary sealing area at the sealing surface 11 of sealing inclined-plane and valve seat 2.
In order to realize the function led, as shown in Figure 2, the bottom of described valve plug 3 is conical.The conical bottom of valve plug 3 can realize guide function, is convenient to valve plug 3 and is inserted in the toroidal surface 12 of valve seat 2.
The structure that aforesaid mangetic core assembly applies in drain valve is shown in Figure 1, comprise valve body 5, mangetic core assembly, valve rod 6 and packing seal structure 7, be provided with valve pocket, import in described valve body 5, export and be communicated to the packing cavity of valve pocket, described mangetic core assembly is arranged in valve body 5, described packing seal structure 7 is arranged in the packing cavity of valve body 5, and described valve rod 6 penetrates in valve pocket by packing seal structure 7; Spool 1 is connected with the bottom of valve rod 6, can be controlled the motion of spool 1 by the motion of valve rod 6, and it is interior and corresponding with outlet that valve seat 2 is placed in valve pocket.The working principle of mangetic core assembly and effect are see aforementioned, and other working principle of valve is identical with conventional drain valve.
In order to increase the sealing reliability of valve rod 6 and filler packing, as shown in Figure 5, described packing seal structure 7 comprises filler packing 71, filler pressing sleeve 72, Gland 73 and Packing seat 74, described valve body is provided with packing cavity, described Packing seat 74, filler packing 71, filler pressing sleeve 72, Gland 73 are arranged in packing cavity from down to up successively, and described valve rod 6 enters valve pocket through Gland 73, filler pressing sleeve 72, filler packing 71 and Packing seat 74; Finally, Gland 73, filler pressing sleeve 72, filler packing 73, Packing seat 74 are pressed in packing cavity tightly by bolt.Described Packing seat 74 in a tubular form, the inwall of Packing seat 74 offers at least two annular grooves vertically.Filler packing 71, filler pressing sleeve 72, Gland 73 are with traditional packing seal and indifference, it makes Gland 73 apply pressure by bolt thus makes filler pressing sleeve 72 compress filler packing 71, filler packing 71 highly diminishes, radius becomes large, thus can regulate the sealing effect of filler packing 71.The material of filler packing 71 is generally graphite.
Valve pressure is higher, and the tight power needed for filler packing 71 is larger, and medium is more to washing away of filler packing 71, and valve rod 6 is also more with the wearing and tearing of filler packing 71; And present invention uses Packing seat 74, when MEDIA FLOW is through Packing seat 74 first annular grooves, through throttling, speedup, dilatation, complete a reducing pressure by regulating flow process, and then repeat previous process; When MEDIA FLOW is through Packing seat 74 second annular grooves, complete again a pressure reduction, through multistage throttle step-down, during arrival filler packing 71, pressure medium has reduced a lot, so just alleviate the tight power needed for filler packing 71, decrease medium to wash away filler packing 71, thus extend filler working life.
Claims (7)
1. valve plug of drain valve assembly, comprises spool (1) and valve seat (2), it is characterized in that:
Described valve seat (2) entirety is up big and down small ring structure, and the top of valve seat (2) inner ring surface is conical sealing surface (11), and the bottom of valve seat (2) inner ring surface is toroidal surface (12);
Described spool (1) is for cylindric, and spool (1) is sealed and matched with the sealing surface (11) of valve seat (2);
Also comprise columned valve plug (3), described valve plug (3) be arranged on spool (1) bottom and coaxial with spool (1), the size of described valve plug (3) is mated with the toroidal surface (12) of valve seat (2);
When spool (1) is sealed and matched with valve seat (2), valve plug (3) inserts in the toroidal surface (12) of valve seat (2), spool (1), the buffer space (4) that between valve seat (2) and valve plug (3), formation one is annular.
2. valve plug of drain valve assembly as claimed in claim 1, it is characterized in that: described valve plug (3) is provided with at least one annular groove (8), when spool (1) is sealed and matched with valve seat (2), all annular grooves (8) all can enter in the toroidal surface (12) of valve seat (2).
3. valve plug of drain valve assembly as claimed in claim 1, is characterized in that: the cross section of described buffer space (4) is right-angled triangle.
4. valve plug of drain valve assembly as claimed in claim 1, it is characterized in that: the sealed end chamfering of described spool (1) forms conical sealing inclined-plane, when spool (1) is sealed and matched with valve seat (2), complement each other to form primary sealing area at the sealing surface (11) of sealing inclined-plane and valve seat (2).
5. the valve plug of drain valve assembly as described in claim as arbitrary in Claims 1-4, is characterized in that: the bottom of described valve plug (3) is for conical.
6. drain valve, comprise valve body (5), mangetic core assembly, valve rod (6) and packing seal structure (7), be provided with valve pocket, import in described valve body (5), export and be communicated to the packing cavity of valve pocket, described mangetic core assembly is arranged in valve body (5), described packing seal structure (7) is arranged in the packing cavity of valve body (5), and described valve rod (6) penetrates in valve pocket by packing seal structure (7); It is characterized in that: described mangetic core assembly adopts the valve plug of drain valve assembly as described in claim as arbitrary in claim 1 to 5.
7. drain valve as claimed in claim 6, it is characterized in that: described packing seal structure (7) comprises filler packing (71), filler pressing sleeve (72), Gland (73) and Packing seat (74), described valve body is provided with packing cavity, described Packing seat (74), filler packing (71), filler pressing sleeve (72), Gland (73) is arranged in packing cavity from down to up successively, described valve rod (6) is through Gland (73), filler pressing sleeve (72), filler packing (71) and Packing seat (74) enter valve pocket, Gland, filler pressing sleeve, filler packing, Packing seat are pressed in packing cavity by bolt, and described Packing seat (74) in a tubular form, the inwall of Packing seat (74) offers vertically at least two annular grooves (8a).
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 true CN104989834A (en) | 2015-10-21 |
| CN104989834B CN104989834B (en) | 2018-01-16 |
Family
ID=54301690
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 |
|---|---|
| CN (1) | CN104989834B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111550568A (en) * | 2020-05-20 | 2020-08-18 | 上海发电设备成套设计研究院有限责任公司 | Erosion-resistant sealing structure of regulating valve |
Citations (7)
| 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 |
| CN204784783U (en) * | 2015-07-28 | 2015-11-18 | 王庭铨 | Trap case subassembly and trap |
-
2015
- 2015-07-28 CN CN201510449959.8A patent/CN104989834B/en active Active
Patent Citations (7)
| 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 |
| CN204784783U (en) * | 2015-07-28 | 2015-11-18 | 王庭铨 | Trap case subassembly and trap |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111550568A (en) * | 2020-05-20 | 2020-08-18 | 上海发电设备成套设计研究院有限责任公司 | Erosion-resistant sealing structure of regulating valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104989834B (en) | 2018-01-16 |
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