CN104279343A - Balance pilot type combined structure - Google Patents
Balance pilot type combined structure Download PDFInfo
- Publication number
- CN104279343A CN104279343A CN201310288612.0A CN201310288612A CN104279343A CN 104279343 A CN104279343 A CN 104279343A CN 201310288612 A CN201310288612 A CN 201310288612A CN 104279343 A CN104279343 A CN 104279343A
- Authority
- CN
- China
- Prior art keywords
- valve
- pilot
- main valve
- valve element
- balance
- 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.)
- Pending
Links
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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
- F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
- F16K3/26—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members with fluid passages in the valve member
- F16K3/262—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members with fluid passages in the valve member with a transverse bore in the valve member
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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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
- F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
- F16K3/26—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members with fluid passages in the valve member
- F16K3/267—Combination of a sliding valve and a lift valve
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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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
Abstract
The invention belongs to an internal sealing structure for a valve, and particularly relates to a balance pilot type combined structure. The balance pilot type combined structure comprises a cylindrical main valve element. The main valve element is of a hollow structure, and a pilot valve element is arranged in the main valve element and connected with a valve rod. The head portion of the pilot valve element is sleeved with a pilot spring, one end of the pilot spring abuts against a boss of the pilot valve element, and the other end of the pilot spring abuts against the main valve element. The valve rod penetrates through a pilot gland, and the pilot gland is connected with the main valve element. The exterior of the upper end of the main valve element is connected with a sealing ring gland, and a balance sealing ring is arranged between the main valve element and the sealing ring gland in a cushioning mode. A through hole is formed in the side surface of the main valve element, a slide valve ball sealer is arranged in the through hole, and a slide valve seat is installed in the through hole in the side surface of the main valve element. The balance pilot type combined structure has the advantages of having both the characteristics of a balance type single seat sleeve valve and the characteristics of a pilot type sleeve guide valve and achieving automatic switching between working principles under the condition of different flow directions through the slide valve structure.
Description
Technical field
The invention belongs to a kind of valve internal seal structure, be specifically related to a kind of sleeve-type regulating valve when heavy caliber, High Pressure Difference, under the prerequisite not significantly improving driving force, still can realize the balance guide composite structure of excellent sealing.
Background technique
Sleeve-type regulating valve is quite ripe through development for many years, is one of main flow modulating valve product in the market.The major advantage of sleeve-type regulating valve has: guiding is reliable, good stability; Inner without being threaded, maintenance is convenient; The requirement the different operating mode of considerable Structure adaptation can be changed.
Large-caliber sleeve valve has three kinds of structures usually by the internal pressure mode of action: balanced type single seat telescoping valve (band balanced seal circle), leading type cage guiding valve, balanced type double sealing surface sleeve valve.Wherein better with the sealability of balanced type single seat telescoping valve, leading type cage guiding valve.
Balanced type single seat telescoping valve is a kind of structural type being in the fast-developing phase at present, it by one valve seat primary seal with together with superposed slipper seal form.It possesses the advantage the same with single-seat valve: while easy to manufacture, easy to maintenance, possess again forward and reverse can pressure balanced feature, can be used for the situation of heavy caliber, High Pressure Difference, be equipped with suitable driving force and can realize two-way low leakage sealed.
Leading type cage guiding valve flows at one and utilizes medium power auxiliary valve to cut out, and can realize extremely low leakage sealed by less sealing force, the larger effect of bore, pressure reduction is better.Opening by pilot valve release spool upper pressure is auxiliary during valve open, is a kind ofly require minimum structure to valve rod driving force.But it has very large leakage rate when medium reverse flow, is only suitable for the medium of one-way flow, and Applicable scope is wideless.
The advantage of balanced type double sealing surface sleeve valve is simple and reliable for structure, but sealing force is comparatively large, and this form modulating valve is generally soft sealing structure.If make two pass firmly to seal, quite high to the requirement manufactured, the sealing force simultaneously needed can increase sharply, this is because spool double-sealing face is rigid state, valve seat double-sealing face is also rigid state, can not fit completely in theory simultaneously.Sealing difficulty, leakage rate is greatly its intrinsic shortcoming, makes great efforts slightly to improve by technique.
Summary of the invention
The object of this invention is to provide a kind of balance guide composite structure, it can be used for the novel sealing structure of sleeve-type regulating valve.Valve is based on balanced type single seat telescoping valve, but the structure of spool has the feature of balanced type single seat telescoping valve and leading type cage guiding valve simultaneously, and by sliding valve structure realize various flows to time working principle automatic switchover.
The present invention realizes like this, balance guide composite structure, it comprises columned main valve plug, main valve plug is hollow structure, the inside of main valve plug is provided with pilot valve, pilot valve is connected with valve rod, guide's spring housing is contained in the head of pilot valve, one end of guide's spring props up the boss of pilot valve, the other end props up main valve plug, valve rod is through guide's gland, guide's gland is connected with main valve plug, main valve plug upper end be externally connected to seal ring gland, balanced seal circle is lined with between main valve plug and seal ring gland, the side of main valve plug has through hole, guiding valve ball sealer is provided with in through hole, the through hole of the side of main valve plug is also provided with slide valve seat.
The cross section of the through hole of described main valve plug inside is T-shaped.
Advantage of the present invention is, it has the feature of balanced type single seat telescoping valve and leading type cage guiding valve simultaneously, and by sliding valve structure realize various flows to time working principle automatic switchover.When not increasing extra-push model, realize a flow direction extremely low leakage sealed, another flows to low leakage sealed.This structure can make balanced type single seat telescoping valve obtain the unidirectional isolation features of leading type cage guiding valve when keeping original structure, function, parameter.
Accompanying drawing explanation
Fig. 1 is balance guide composite structure figure schematic diagram provided by the present invention;
Fig. 2 is entrance pressure equilibrium principle figure under balance guide composite structure modulating valve;
Fig. 3 is entrance pressure guide schematic diagram on balance guide composite structure modulating valve.
In figure, 1 valve body, 2 valve seats, 3 balance guide composite structure mangetic core assemblies, 4 sleeves, 5 valve rods, 6 valve gaps, flange bolt in 7, flange gasket in 8,9 sleeve pads, 10 valve seat pads, 11 main valve plugs, 12 slide valve seats, 13 guiding valve ball sealers, 14 pilot valve, 15 guide's springs, 16 valve rods, 17 balanced seal circles, 18 seal ring glands, 19 guide's glands.
Embodiment
Below in conjunction with accompanying drawing and example, the present invention is described in detail:
Shown in Fig. 1, balance guide composite structure comprises columned main valve plug 11, main valve plug 11 is hollow structure, the cross section of inner through hole is T-shaped, the inside of main valve plug 11 is provided with pilot valve 14, pilot valve 14 is threaded with valve rod 16, guide's spring 15 is sleeved on the head of pilot valve 14, one end of guide's spring 15 props up the boss of pilot valve 14, the other end props up main valve plug 11, valve rod 16 is through guide's gland 19, guide's gland 19 is threaded connection with the through hole of main valve plug 11, the external screw-thread of main valve plug 11 upper end is connected with seal ring gland 18, balanced seal circle 17 is lined with between main valve plug 11 and seal ring gland 18, the side of main valve plug 11 has through hole, guiding valve ball sealer 13 is provided with in through hole, the through hole of the side of main valve plug 11 is also provided with slide valve seat 12.
When valve normally works, valve rod 5 is with dynamic balancing guide composite structure mangetic core assembly 3 to slide up and down in sleeve 4 inside, and guiding valve ball sealer 13 is in free state as shown in Figure 1; When valve needs to close, main valve plug 11 contacts with valve seat 2, but needs larger defeating tightly could realize sealing, and the acquisition of power is divided into lower entrance pressure and upper entrance pressure two kinds of situations to illustrate.As shown in Figure 2, under modulating valve during entrance pressure, guiding valve ball sealer 13 can be positioned at right side by the effect of medium fluid power, and low pressure " P " arrives mangetic core assembly top through equalizing orifice, and basic unbalanced force of eliminating is on the impact of valve base sealing.Valve can form the sealing of low leakage under the effect of valve rod driving force " F "; On modulating valve during entrance pressure, guiding valve ball sealer 13 can be positioned at left side by the effect of medium fluid power, and upper pressure " P " arrives mangetic core assembly top through equalizing orifice, and auxiliary valve seals, and valve rod driving force " F " works and can realize the extremely low leakage sealed of valve.New structure can when not increasing extra-push model, and realize one and flow to extremely low leakage sealed (isolation features), another flows to low leakage sealed.This structure can make modulating valve realize two way sealed and unidirectional isolation features when keeping original general structure, function, parameter simultaneously.
Claims (2)
1. balance guide's composite structure, it is characterized in that: it comprises columned main valve plug (11), main valve plug (11) is hollow structure, the inside of main valve plug (11) is provided with pilot valve (14), pilot valve (14) is connected with valve rod (16), guide's spring (15) is sleeved on the head of pilot valve (14), one end of guide's spring (15) props up the boss of pilot valve (14), the other end props up main valve plug (11), valve rod (16) is through guide's gland (19), guide's gland (19) is connected with main valve plug (11), main valve plug (11) upper end be externally connected to seal ring gland (18), balanced seal circle (17) is lined with between main valve plug (11) and seal ring gland (18), the side of main valve plug (11) has through hole, guiding valve ball sealer (13) is provided with in through hole, the through hole of the side of main valve plug (11) is also provided with slide valve seat (12).
2. balance guide composite structure as claimed in claim 1, is characterized in that: the cross section of the through hole that described main valve plug (11) is inner is T-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310288612.0A CN104279343A (en) | 2013-07-10 | 2013-07-10 | Balance pilot type combined structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310288612.0A CN104279343A (en) | 2013-07-10 | 2013-07-10 | Balance pilot type combined structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104279343A true CN104279343A (en) | 2015-01-14 |
Family
ID=52254524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310288612.0A Pending CN104279343A (en) | 2013-07-10 | 2013-07-10 | Balance pilot type combined structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104279343A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105697799A (en) * | 2015-12-25 | 2016-06-22 | 吴忠仪表有限责任公司 | Novel double-valve-element control valve |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2392959Y (en) * | 1999-10-13 | 2000-08-23 | 石油大学(华东) | Pre-guide balancing plunger type throttle valve |
| WO2004061346A1 (en) * | 2002-12-19 | 2004-07-22 | Fisher Controls International Llc | Control valve with low noise and enhanced flow characteristics |
| CN201496566U (en) * | 2009-08-05 | 2010-06-02 | 无锡卓尔阀业有限公司 | High-pressure boiler water feeding control valve |
| CN101893098A (en) * | 2009-05-22 | 2010-11-24 | 浙江三花股份有限公司 | Pilot-operated type two-way circulated solenoid valve |
| CN202510790U (en) * | 2012-03-31 | 2012-10-31 | 浙江三方控制阀股份有限公司 | Pilot-operated cage type single seat regulating valve |
| CN202927178U (en) * | 2012-11-10 | 2013-05-08 | 无锡智能自控工程股份有限公司 | Pilot-operated double-valve core split-range control valve |
-
2013
- 2013-07-10 CN CN201310288612.0A patent/CN104279343A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2392959Y (en) * | 1999-10-13 | 2000-08-23 | 石油大学(华东) | Pre-guide balancing plunger type throttle valve |
| WO2004061346A1 (en) * | 2002-12-19 | 2004-07-22 | Fisher Controls International Llc | Control valve with low noise and enhanced flow characteristics |
| CN101893098A (en) * | 2009-05-22 | 2010-11-24 | 浙江三花股份有限公司 | Pilot-operated type two-way circulated solenoid valve |
| CN201496566U (en) * | 2009-08-05 | 2010-06-02 | 无锡卓尔阀业有限公司 | High-pressure boiler water feeding control valve |
| CN202510790U (en) * | 2012-03-31 | 2012-10-31 | 浙江三方控制阀股份有限公司 | Pilot-operated cage type single seat regulating valve |
| CN202927178U (en) * | 2012-11-10 | 2013-05-08 | 无锡智能自控工程股份有限公司 | Pilot-operated double-valve core split-range control valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105697799A (en) * | 2015-12-25 | 2016-06-22 | 吴忠仪表有限责任公司 | Novel double-valve-element control valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150114 |
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| RJ01 | Rejection of invention patent application after publication |