CN101818826B - Expansion valve - Google Patents
Expansion valve Download PDFInfo
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- CN101818826B CN101818826B CN2009100223278A CN200910022327A CN101818826B CN 101818826 B CN101818826 B CN 101818826B CN 2009100223278 A CN2009100223278 A CN 2009100223278A CN 200910022327 A CN200910022327 A CN 200910022327A CN 101818826 B CN101818826 B CN 101818826B
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- valve
- sieve
- steam
- valve body
- expansion valve
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Abstract
The invention discloses an expansion valve, which comprises a valve body 1. A combined sealing ring 2 and a plunger piston 3 for controlling medium flow are arranged in a cavity inside the valve body 1; the upper part of the combined sealing ring 2 is provided with a valve cover 6 for positioning the combined sealing ring 2, and the valve cover 6 is fixedly arranged on the valve body 1; a valve rod assembly 5 is arranged on the plunger piston 3, and the lower part of the valve rod assembly 5 is provided with a condensate baffle plate 4; a conical intercepting screen 9 is arranged at a lower medium inlet A of the valve body 1, and the upper end of the conical intercepting screen 9 is provided with a hemispherical steam screen 8. By simplifying the internal structure of the expansion valve and a control element, the expansion valve reduces the medium flowing energy loss, has large treatment amount of refrigerating medium, simplifies a driving control device, and is convenient to maintain and operate.
Description
Technical field
The present invention relates to a kind of expansion valve with the plunger valve element.
Background technique
In the prior art, in the steam-refrigerated circulatory system, the main principle design expansion valve that dams that utilizes produces refrigerant vapor, but traditional expansion valve need add control system, and need the additional vaporization device, and along with the increase of media processes amount, the also corresponding rising of expansion valve and auxiliary facility price.In addition, damming of conventional expanded valve causes the loss of media flow energy bigger.
Summary of the invention
The objective of the invention is at defective of the prior art, thereby design a kind of expansion valve, it is by simplifying expansion valve internal structure and control unit, reduce the media flow energy loss, treating capacity to refrigerant is bigger, simplifies driving-controlling device, is convenient to maintenance and operation.The described a series of problems of background technique have effectively been overcome.
The technical solution adopted for the present invention to solve the technical problems is: described expansion valve, include valve body 1, be characterized in also including: described valve body 1 inner lumen is provided with combined seal ring 2 and is used for the plunger 3 of control media flow, combined seal ring 2 tops are provided with the valve gap 6 to its location, valve gap 6 is fixedly mounted on the valve body 1, valve rod assembly 5 is installed on the plunger 3, valve rod assembly 5 bottoms are provided with condensing baffle plate 4, the A place, medium inlet, bottom of valve body 1 is provided with the taper sieve 9 that dams, and taper sieve 9 upper ends of damming are equipped with hemisphere steam sieve 8.
Described expansion valve, medium inlet passage axis VV ' overlaps with valve rod assembly 5 axis of movements, and medium inlet A is a refrigerant liquid phase section to speedup hypotensive point B, and it is the discharge opeing section that speedup hypotensive point B is sieved into mouthful C to hemisphere steam; Outlet passage axes O O ' is the axis of medium flow pass, is the vapour-liquid settling section between reduction of speed point E and the media outlet D.Outlet passage axes O O ' is valve body central point F with the intersection point of medium inlet passage axis VV ', and the valve body center is a round cavity.
The present invention compares with background technique, the useful effect that has is: described expansion valve, valve rod assembly 5 drives long end plug 3 and is in full-gear following time, and after the liquid refrigeration MEDIA FLOW was crossed medium inlet A and dammed sieve 9 speedup hypotensive point B to taper, refrigerant remained liquid state.Begin the step-down of refrigerant speedup from speedup hypotensive point B, part is dammed by taper and is sieved the opening outflow of being opened on 9 conical surfaces.Because the effect of damming of opening, refrigerant produces steam and liquefied mixture, and wherein liquid medium is a main component.Taper is dammed the total circulation area of opening that sieve opened on 9 conical surfaces greater than the circulation area at speedup hypotensive point B place, and is little by the dam medium energy loss of sieve 9 conical flow through holes outflow of taper.The taper sieve 9 that dams is blocked by the openings of media outlet one side, its objective is that the fluid in sieve 9 is dammed in taper produces uneven Driving force, increases to enter the turbulence effect that hemisphere steam sieves 8 fluids, enhancing steam production rate.The hemisphere steam of flowing through is sieved into mouthful medium at C place and is subjected to the taper sieve conical surface border compression of damming, speed improves pressure and reduces, begin the decompression evaporation of damming through the evaporation aperture that distributes on the hemisphere steam sieve 8, because the pressure in the hemisphere steam sieve 8 carries out balance by the below taper sieve 9 that dams, therefore the media flow energy loss in hemisphere steam sieve 8 is little.The effect of valve body central circular inner chamber is to slow down velocity of medium, by action of gravity the steam in the refrigerant is separated for the first time with liquid.The medium of initial gross separation is not mingled with liquid through the vapour-liquid settling section between reduction of speed point E and the media outlet D in the steam in the medium, can directly connect adapter and steam is drawn freeze.Be fixed on valve rod assembly 5 lower end condensing baffle plates 4 play a part to condense drop and the protection valve rod, be covered with the sphere pit on condensing baffle plate 4 and the surface that medium contacts, liquid medium is adsorbed owing to capillarity in these positions, form one deck liquid film, liquid film further adsorbs the drop in the steam, and the liquid of separating out is along under condensing baffle plate 4 marginal flows; Liquid film takes blocking effect to steam and drop, prolongs the working life of condensing baffle plate 4.Condensing baffle plate 4, screw 7, hemisphere steam sieve 8, the taper sieve 9 that dams all is convenient to change and safeguard.During valve closing, along with moving of valve rod assembly 5, rate-of flow reduces, and the effect of steam regulation flow is played in the corresponding minimizing of steam flow, can manually control, and is simple.
Description of drawings
Fig. 1 is the structural representation of the present invention when being in the complete opening state;
Fig. 2 is the structural representation of the present invention when being in complete closed state.
Embodiment
As shown in Figure 1, 2, described expansion valve, include valve body 1, be characterized in also including: described valve body 1 inner lumen is provided with combined seal ring 2 and is used for the plunger 3 of control media flow, and combined seal ring 2 tops are provided with the valve gap 6 to its location, and valve gap 6 is fixedly mounted on the valve body 1, valve rod assembly 5 is installed on the plunger 3, valve rod assembly 5 bottoms are provided with condensing baffle plate 4, and the A place, medium inlet, bottom of valve body 1 is provided with the taper sieve 9 that dams, and taper sieve 9 upper ends of damming are equipped with hemisphere steam sieve 8.
Described condensing baffle plate 4 is fixed on valve rod assembly 5 lower ends by screw 7; Taper sieve 9 lower ends of damming link to each other with valve body 1 by screw, and dam sieve 9 and hemisphere steam of taper sieves 8 and links to each other by screw thread.Described valve body 1 center is a round cavity, and medium inlet passage axis VV ' overlaps with valve rod assembly 5 axis of movements.
Described taper is dammed and vertically is provided with opening, the diameter D of opening on sieve 9 the inclined-plane
ZSpan is 0.01D
B≤ D
Z≤ 0.1D
B, D wherein
BRunner internal diameter for speedup hypotensive point B place; Total circulation area A of opening
ZCirculation area A with speedup hypotensive point B place
BBetween the pass be 1.2A
B≤ A
Z≤ 2A
BDescribed hemisphere steam sieve 8 is provided with opening, the inside diameter D of opening
QSpan is 0.02D
C≤ D
Q≤ 0.07D
C, D wherein
CFor hemisphere steam is sieved into mouthful internal diameter at C place; Total circulation area A of opening
QBe sieved into mouthful circulation area A at C place with hemisphere steam
CBetween the pass be 0.5A
C≤ A
Q≤ 0.9A
CThe diameter D that the media outlet of described valve body 1 (D) is located
DDiameter D with reduction of speed point E place
ESatisfy relation: 0.5D
D≤ D
E≤ 0.8D
D
Described condensing baffle plate 4 is a cambered plate, and the span of its radian X is 0.6～0.8 radian, distribution sphere pit on the condensing baffle plate 4, and density r kinematical viscosity u, the mass flow rate Q of the degree of depth h of sphere pit and refrigerant have following relation: h=5.37 * 10
-8Q/ (ru); The diameter d of the degree of depth h of sphere pit and sphere pit has following relation: d=1.5～3.7h.
Described expansion valve, as shown in Figure 1, this moment, valve medium flow reached maximum, steam flow also is maximum, valve rod assembly 5 drives long end plug 3 and is in full-gear following time, dam sieve 9 bus and the angle of medium inlet passage axis VV ' of taper is 10 °, the flow velocity when the liquid refrigeration medium is sieved into mouthful C by hemisphere steam
VC can reach 2.2～3.5V
AWith the quality coefficient is criterion, and the liquid refrigeration medium has 23～33% steam to produce by the taper sieve 9 that dams.After the liquid refrigeration medium enters hemisphere steam sieve 8, sieve 9 is blocked by the opening of media outlet one side because taper is dammed, fluid in sieve 9 is dammed in taper produces uneven Driving force, and the turbulence effect that hemisphere steam sieves 8 fluids is enhanced, and strengthens the steam production rate simultaneously.Medium becomes big at the flow velocity that hemisphere steam is sieved into mouthful C, produces turbulence and the double action of damming at the opening place of hemisphere steam sieve 8, causes the steam growing amount quality coefficient of this position to reach 74～85%.Steam and the liquid medium that mixes be at valve body central circular inner chamber, long end plug 3 and condensing baffle plate 4 sprays, liquid medium along wall flow following and with liquid level in the valve body with 0.6～0.8V
ASpeed overflow media outlet D; The steam that forms under the effect of volumetric expansion and pressure medium with 1.3～1.7V
ASpeed flow out media outlet D; Medium is not mingled with liquid through the vapour-liquid settling section between reduction of speed point E and the media outlet D in the steam in the medium, top, media outlet D cross section is divided into mobile steam, and the bottom is divided into mobile liquid medium, can directly connect adapter and steam is drawn freeze.The diameter D of reduction of speed point E
EDiameter D with media outlet D
DSatisfy following relationship: 0.5D
D≤ D
E≤ 0.8D
DBy above-mentioned analysis and calculating, valve produces steam under full-gear quality coefficient is 53～67%.In the valve opening process, the relation of the flow of medium and valve lifting capacity meets the quick open type flow characteristic.
Described expansion valve as shown in Figure 2, is the structural drawing that valve is in complete closed state.In closing course, long end plug 3 forms sealing along with valve rod assembly 5 moves down with combined seal ring 2 rubbing contact.In the process that long end plug 3 promotes downwards, reduce the circulation area of media outlet gradually, thereby reach the purpose of regulating flow, the steam that valve produces and corresponding the reducing of flow of liquid medium.The condensing baffle plate 4 of valve rod assembly 5 belows is in the decline process, and hemisphere steam sieves the medium that flows out in 8 openings to be strengthened gradually to its impact force.Condensing baffle plate 4 is a cambered plate, and the span of its radian X is 0.6～0.8 radian.Distribution sphere pit on the condensing baffle plate 4, density r kinematical viscosity u, the mass flow rate Q of the degree of depth h of sphere pit and refrigerant have following relation: h=5.37 * 10
-8Q/ (ru).The diameter d of the degree of depth h of sphere pit and sphere pit has following relation: d=1.5～3.7h.Sieve in 8 moving process to hemisphere steam at condensing baffle plate 4, be covered with the sphere pit on condensing baffle plate 4 and the surface that medium contacts, liquid medium is adsorbed owing to capillarity in these positions, form one deck liquid film, liquid film further adsorbs the drop in the steam, and the liquid of separating out is along under condensing baffle plate 4 marginal flows; Liquid film takes blocking effect to steam and drop, prolongs the working life of condensing baffle plate 4.After long end plug 3 and combined seal ring 2 complete closures, the medium transmission of valve stops.
Claims (7)
1. expansion valve, include valve body (1), it is characterized in that also including: the inner lumen of described valve body (1) is provided with combined seal ring (2) and is used for the plunger (3) of control media flow, combined seal ring (2) top is provided with the valve gap (6) to its location, valve gap (6) is fixedly mounted on the valve body (1), valve rod assembly (5) is installed on the plunger (3), valve rod assembly (5) bottom is provided with condensing baffle plate (4), the taper sieve (9) that dams is located to be provided with in the medium inlet, bottom (A) of valve body (1), and taper sieve (9) upper end of damming is equipped with hemisphere steam sieve (8).
2. expansion valve according to claim 1 is characterized in that: described condensing baffle plate (4) is fixed on valve rod assembly (5) lower end by screw (7); Taper sieve (9) lower end of damming links to each other with valve body (1) by screw, and the taper sieve (9) that dams links to each other by screw thread with hemisphere steam sieve (8).
3. expansion valve according to claim 1 is characterized in that: described valve body (1) center is a round cavity, and the medium inlet passage axis (VV ') overlap with valve rod assembly (5) axis of movement.
4. expansion valve according to claim 2 is characterized in that: described taper is dammed and vertically is provided with opening, the diameter D of opening on the inclined-plane of sieve (9)
ZSpan is 0.01D
B≤ D
Z≤ 0.1D
B, D wherein
BThe runner internal diameter of locating for speedup hypotensive point (B); Total circulation area A of opening
ZThe circulation area A that locates with speedup hypotensive point (B)
BBetween the pass be 1.2A
B≤ A
Z≤ 2A
B
5. expansion valve according to claim 2 is characterized in that: described hemisphere steam sieve (8) is provided with opening, the inside diameter D of opening
QSpan is 0.02D
C≤ D
Q≤ 0.07D
C, D wherein
CBe sieved into the internal diameter of mouthful (C) for hemisphere steam; Total circulation area A of opening
QBe sieved into the circulation area A of mouthful (C) with hemisphere steam
CBetween the pass be 0.5A
C≤ A
Q≤ 0.9A
C
6. expansion valve according to claim 3 is characterized in that: the diameter D that the media outlet (D) of described valve body (1) is located
DThe diameter D that locates with reduction of speed point (E)
ESatisfy relation: 0.5D
D≤ D
E≤ 0.8D
D
7. expansion valve according to claim 1, it is characterized in that: described condensing baffle plate (4) is a cambered plate, the span of its radian X is 0.6～0.8 radian, condensing baffle plate (4) is gone up distribution sphere pit, and density r kinematical viscosity u, the mass flow rate Q of the degree of depth h of sphere pit and refrigerant have following relation: h=5.37 * 10
-8Q/ (ru); The diameter d of the degree of depth h of sphere pit and sphere pit has following relation: d=1.5～3.7h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100223278A CN101818826B (en) | 2009-04-22 | 2009-04-22 | Expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100223278A CN101818826B (en) | 2009-04-22 | 2009-04-22 | Expansion valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101818826A CN101818826A (en) | 2010-09-01 |
| CN101818826B true CN101818826B (en) | 2011-08-24 |
Family
ID=42654034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100223278A Expired - Fee Related CN101818826B (en) | 2009-04-22 | 2009-04-22 | Expansion valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101818826B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2019532A (en) * | 1978-04-19 | 1979-10-31 | Crane Co | Low Noise Value |
| DE29801762U1 (en) * | 1998-02-03 | 1998-04-02 | Arca Regler GmbH, 47918 Tönisvorst | Valve for the pressure and temperature reduction of superheated steam |
| US6742773B2 (en) * | 2000-11-30 | 2004-06-01 | Dresser, Inc. | Steam pressure reducing and conditioning valve |
| CN201209708Y (en) * | 2008-06-13 | 2009-03-18 | 天津市海川电力技术有限公司 | Steam changeover valve for steam turbine by-path system |
-
2009
- 2009-04-22 CN CN2009100223278A patent/CN101818826B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2019532A (en) * | 1978-04-19 | 1979-10-31 | Crane Co | Low Noise Value |
| DE29801762U1 (en) * | 1998-02-03 | 1998-04-02 | Arca Regler GmbH, 47918 Tönisvorst | Valve for the pressure and temperature reduction of superheated steam |
| US6742773B2 (en) * | 2000-11-30 | 2004-06-01 | Dresser, Inc. | Steam pressure reducing and conditioning valve |
| CN201209708Y (en) * | 2008-06-13 | 2009-03-18 | 天津市海川电力技术有限公司 | Steam changeover valve for steam turbine by-path system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101818826A (en) | 2010-09-01 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20100901 Assignee: Haixi Huahui Chemical Machinery Co.,Ltd. Assignor: Lanzhou University Of Technology Contract record no.: 2013620000029 Denomination of invention: Expansion valve Granted publication date: 20110824 License type: Exclusive License Record date: 20130711 |
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| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110824 Termination date: 20180422 |
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| CF01 | Termination of patent right due to non-payment of annual fee |