CN105937654A - Valve seat and safety valve - Google Patents
Valve seat and safety valve Download PDFInfo
- Publication number
- CN105937654A CN105937654A CN201610465237.6A CN201610465237A CN105937654A CN 105937654 A CN105937654 A CN 105937654A CN 201610465237 A CN201610465237 A CN 201610465237A CN 105937654 A CN105937654 A CN 105937654A
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- CN
- China
- Prior art keywords
- valve seat
- channel
- passage
- outlet
- valve
- 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.)
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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
- F16K51/00—Other details not peculiar to particular types of valves or cut-off apparatus
-
- 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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses a valve seat and a safety valve. The valve seat comprises a valve seat body; an inlet is formed in one end of the valve seat body; an outlet is formed in the other end of the valve seat body; a fluid channel communicating the inlet and the outlet is arranged in the valve seat body; the fluid channel comprises a first channel body and a second channel body which are sequentially connected between the inlet and the outlet in the axial direction; the inner diameter of the first channel body is gradually decreased from the first end connected with the inlet to the second end connected with the second channel body; and the inner wall included angle alpha of the first channel body ranges from 18 degrees to 21 degrees. According to the valve seat, by means of improved arrangement of the inner circulating channel, the inclination angle, on a straight line, of the inner wall of the circulating channel in the aspect of shape conforms to a fluid speed attenuation distribution curve, the flowing resistance is reduced, the fluid speed is increased, the discharge of the safety valve with the valve seat can be effectively improved, and therefore the product quality of the safety valve is improved, and an overpressure protection effect is achieved.
Description
Technical field
The present invention relates to a kind of valve seat construction, particularly relate to a kind of valve seat and relief valve.
Background technology
Relief valve is extremely important safe pressure relief device on boiler, pressure vessel and pressure pipeline, is holding
Playing releasing pressure automatically protective effect when pressure equipment or system overpressure, the quality of its product quality performance directly affects
The safe operation of bearing device.Evaluating the three norms casing rigidity of relief valve quality safety with close
In envelope, performance and discharge capacity performance, discharge capacity performance indications are particularly important, specific as follows:
(1) Methods of Safety Valve Discharge Capacity deficiency can cause device systems superpressure, causes pressure-bearing special equipment to explode；
(2) increase relief valve discharge efficiency, be favorably improved its unit are discharge capacity, so, in phase
Under same safety dischtrge requires, pressure-bearing special equipment can realize the device aperture of minimum, makes stress divide
Cloth is more reasonable, it is ensured that pressure-bearing special safety equipment；
(3) in the case of stress distribution is more rational, the reinforcement for openings of equipment etc. more easily realizes,
So, can save great deal of steel, the production making special equipment is more economically reasonable, also achieves meanwhile
Energy-saving and emission-reduction.
Therefore, the raising of relief valve discharge efficiency, it can be ensured that special safety equipment, economy, environmental protection
Run.
The quality of Methods of Safety Valve Discharge Capacity performance depends primarily on the version of valve seat.At present, most peaces
The version of the valve seat that Quan Fa producer is produced is all based on the naive model design of your contraction and enlargement nozzle of traction therapy
, as shown in Figure 1.Along with the direction of fluid flowing, valve seat is tapered condition to larynx footpath d0After the most gradually
Contracting and in straight length.
Owing to discharge capacity performance is not made mandatory technical requirement, associated yield index by China's relevant criterion
Perform by producer's design document requirement, cause producer's not enough attention discharge capacity performance indications.According to relevant
The statistics of test chamber, the overwhelming majority relief valve carry out type approval test discharge capacity test time, its discharge performance
And it is unsatisfactory.In general industry, emission factor sanctified by usage is about 0.8.As can be seen here, base
Its discharge capacity performance of relief valve in this valve seat construction form has the space that has greatly improved.
The reason that existing valve seat construction form causes discharge performance low is that the design of valve seat does not takes into full account valve
The distribution of seat flow field.With reference to Fig. 1, according to hydromechanical principle, in valve seat flow process, along stream
Dynamic direction, the pressure of fluid is diminishing, but the speed of fluid is increasing, when reaching throat (d0Place) time,
Speed reaches local velocity of sound.But due to the rubbing action of fluid Yu valve seat shell rim, near valve seat shell
During body edge, the speed of fluid Y direction is constantly decay.When friction increases to a certain degree,
Throat (d0Place) fluid overall or mean flow rate declines, even do not reach local velocity of sound.Owing to discharge capacity is
Being directly proportional to flow velocity and flow area, flow velocity is the biggest, and flow is the biggest.So, due to the reduction of flow velocity,
Cause the decline of flow.
Fluid is caused to include with the reason of the friction of valve seat shell rim: the rough surface of valve seat shell rim
Degree；The shape of valve seat shell rim.Therefore, it is necessary to a kind of valve seat of design, reduce fluid and valve as far as possible
The friction of seat shell rim, to improve the flow velocity of fluid, improves the discharge performance of relief valve.
Summary of the invention
The technical problem to be solved in the present invention is, it is provided that a kind of flow resistance that reduces, raising fluid velocity
Valve seat and relief valve.
The technical solution adopted for the present invention to solve the technical problems is: provide a kind of valve seat, including valve seat
Body, one end of described valve seat body is provided with entrance, the other end is provided with outlet, sets in described valve seat body
There is the fluid passage connecting described entrance and exit；Described fluid passage includes being connected to institute in turn on axially
Stating the first passage between entrance and exit and second channel, the interior connection without leave of described first passage is described
First end of entrance is gradually reduced to the second end connecting described second channel, and, described first passage
Inwall angle α be 18 °-21 °.
Preferably, the internal diameter d of described first passage and second channel joint and the length of described first passage
The ratio of degree h is 0.31-0.39.
Preferably, described second channel is straight tube-like passage.
Preferably, the internal diameter of described second channel is equal with the internal diameter of described first passage the second end.
Preferably, the length of described second channel is less than the length of described first passage.
Preferably, the outlet of described valve seat body is tapered, and connects described the with the less one end of internal diameter
Two passages.
Preferably, the angle between inwall and the sagittal plane of described fluid passage of described outlet is 45 °
-60°。
Preferably, described valve seat body includes the first pedestal and the second pedestal being connected, and described first leads to
Road is positioned at described First body, and described second channel is positioned at described second pedestal.
Preferably, the inner circumferential shape of the corresponding described first passage of the peripheral shape of described first pedestal；And/or,
The inner circumferential shape of the corresponding described second channel of the peripheral shape of described second pedestal.
The present invention also provides for a kind of relief valve, including the valve seat described in any of the above item.
The valve seat of the present invention, is arranged by the improvement of internal fluid passageways, makes the inwall of circulation passage in shape
On the angle of inclination of straight line, meet the distribution curve of fluid velocity decay on shape, reduce flow resistance, carry
High fluid velocity, can effectively improve the discharge capacity of the relief valve with this valve seat, and then improve relief valve
Product quality, play overpressure protection effect；It is easily achieved practical implementation.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the structural representation of valve seat in prior art；
Fig. 2 is the cross-sectional view of the valve seat of one embodiment of the invention.
Detailed description of the invention
In order to the technical characteristic of the present invention, purpose and effect are more clearly understood from, now compare accompanying drawing
Describe the detailed description of the invention of the present invention in detail.
As it is shown in figure 1, the valve seat of one embodiment of the invention, including valve seat body 10.Valve seat body 10
One end be provided with entrance 11, the other end is provided with outlet 12；Entrance 11 He it is communicated with in valve seat body 10
The fluid passage of outlet 12, passes through for fluid.
Fluid passage includes first passage 13 and the second channel 14 being connected on axially.First passage 13
With second channel 14 is connected in turn between entrance 11 and outlet 12, it may be assumed that first passage 13 and entrance
11 connect, and second channel 14 connects with outlet 12, flow through successively when fluid passes through after entrance 11 enters
First passage 13, second channel 14, then from outlet 12 outflow.
First passage 13 includes the first end and the second end relatively connected, and the first end is connected with entrance 11,
Second end is connected with first passage 13.Interior first end without leave of this first passage 13 gradually subtracts to the second end
Little, thus first passage 13 entirety is tapered configuration.Further, the inwall angle α (two of first passage 13
The angle of relative wall) it is 18 °-21 °, the inclined linear of inwall of second channel 14, meet stream
The distribution curve of body velocity attenuation, reduces flow resistance, improves rate of flow of fluid.
Further, the internal diameter d (also referred to as larynx footpath) of first passage 13 and second channel 14 joint and the
The ratio (d/h) of length h of one passage 13 is 0.31-0.39.
Second channel 14 is straight tube-like passage, and its inner circumferential internal diameter everywhere is consistent.Second channel 14 interior
Footpath is equal with the second end internal diameter of first passage 13.First passage 13 and second channel 14 joint interior
Footpath d, equal to the internal diameter of second channel 14, is also equal to the internal diameter of first passage 13 second end, and this internal diameter is also
It it is the minimum diameter of circulation passage.
The combination of first passage 13 and second channel 14 is arranged, and makes fluid passage be formed first to contract the knot put again
Configuration formula, can make the speed of fluid reach local velocity of sound at channel internal diameter minimum, or promote further
Exceed local velocity of sound.
In the present embodiment, the length of second channel 14 is less than the length of first passage 13.
The internal diameter of the entrance 11 of valve seat body 10 can be slightly larger than the internal diameter of first passage 12 second end.
The outlet 12 of valve seat body 10 is tapered, and connects second channel 14 with one end that internal diameter is less,
Thus export 12 in flaring structure, improve fluid exit velocity.In the present embodiment, the inwall of outlet 12
And the angle β between the sagittal plane of fluid passage is 45 °-60 °.
Further, valve seat body 10 includes the first pedestal 1 and the second pedestal 2 being connected, and first leads to
Road 13 is positioned at the first pedestal 1, and second channel 14 is positioned at the second pedestal 2.
The peripheral shape of the first pedestal 1 also can be generally corresponding to the inner circumferential shape of first passage 13 and arrange, thus
Overall in tapered tubulose, and connect the second pedestal 2 with one end that diameter is less.The periphery of the second pedestal 2
Shape can the inner circumferential shape of corresponding second channel 14 be arranged so that the entirety of this second pedestal 2 is straight tube-like.
First pedestal 1 periphery of corresponding entrance 11 is additionally provided with the step of protrusion, convenient other structures with valve seat
Part or fluid line are in mating connection.
The valve seat of the present invention is applicable to but is not limited to relief valve.
The relief valve of one embodiment of the invention, including above-mentioned valve seat.
Arrange below by way of the various selections of valve seat and measure its discharge coefficient:
In relief valve, on the premise of not changing Disc holder version and Lift thereof, by valve seat
The inwall angle α of middle first passage 13 is set to 11 °, 18 °, 21 °, 24 °, and discharge coefficient is measured
Result such as table 1 below.
Table 1.
| Angle | 11° | 18° | 21° | 24° |
| Discharge coefficient | 0.958 | 0.976 | 0.964 | 0.959 |
From table 1, data understand, when the inwall angle of valve seat first passage 13 uses 18 °, and discharge performance
Optimum.
In relief valve, on the premise of not changing Disc holder version and Lift thereof, by valve seat
First passage 13 and second channel 14 joint internal diameter/first passage 13 length (d/h) arrange
For: 25/120,32/104,40/104,50/104, discharge coefficient measurement result such as table 2 below.
Table 2.
From table 2, data understand, and as d/h ＞ 0.39, discharge coefficient significantly declines.As d/h ＜ 0.31
Time, though discharge coefficient is improved, but its lifting amplitude is the highest, and effect is undesirable；It is additionally, since larynx footpath
Restriction, its total displacement relatively its excess-three kind ratio wants that much less, it is contemplated that manufacturing cost and material economy
Etc. aspect problem, though under this ratio discharge coefficient high its engineering actual apply little.Therefore, d/h
The preferred 0.31-0.39 of ratio.
To sum up, the relief valve of the present invention, by the setting of valve seat, effectively improve the discharge capacity of relief valve,
And then the product quality of raising relief valve, play overpressure protection effect.
The foregoing is only embodiments of the invention, not thereby limit the scope of the claims of the present invention, every
Utilize equivalent structure or equivalence flow process conversion that description of the invention and accompanying drawing content made, or directly or
Connect and be used in other relevant technical fields, be the most in like manner included in the scope of patent protection of the present invention.
Claims (10)
1. a valve seat, including valve seat body (10), one end of described valve seat body (10) is provided with entrance (11), the other end is provided with outlet (12), is communicated with described entrance (11) and the fluid passage of outlet (12) in described valve seat body (10)；It is characterized in that, described fluid passage includes being connected to the first passage (13) between described entrance (11) and outlet (12) and second channel (14) in turn on axially, interior first end connecting described entrance (11) without leave of described first passage (13) is gradually reduced to the second end connecting described second channel (14), further, the inwall angle α of described first passage (13) is 18 °-21 °.
Valve seat the most according to claim 1, it is characterised in that the internal diameter d of described first passage (13) and second channel (14) joint is 0.31-0.39 with the ratio of length h of described first passage (13).
Valve seat the most according to claim 1, it is characterised in that described second channel (14) is straight tube-like passage.
Valve seat the most according to claim 3, it is characterised in that the internal diameter of described second channel (14) is equal with the internal diameter of described first passage (13) second end.
Valve seat the most according to claim 1, it is characterised in that the length of described second channel (14) is less than the length of described first passage (13).
Valve seat the most according to claim 1, it is characterised in that the outlet (12) of described valve seat body (10) is tapered, and connect described second channel (14) with one end that internal diameter is less.
Valve seat the most according to claim 6, it is characterised in that the angle β between inwall and the sagittal plane of described fluid passage of described outlet (12) is 45 °-60 °.
8. according to the valve seat described in any one of claim 1-7, it is characterized in that, described valve seat body (10) includes the first pedestal (1) and the second pedestal (2) being connected, described first passage (13) is positioned at described first pedestal (1), and described second channel (14) is positioned at described second pedestal (2).
Valve seat the most according to claim 8, it is characterised in that the inner circumferential shape of the corresponding described first passage (13) of the peripheral shape of described first pedestal (1)；And/or, the inner circumferential shape of the corresponding described second channel (14) of the peripheral shape of described second pedestal (2).
10. a relief valve, it is characterised in that include the valve seat described in any one of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610465237.6A CN105937654B (en) | 2016-06-23 | 2016-06-23 | Valve seat and safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610465237.6A CN105937654B (en) | 2016-06-23 | 2016-06-23 | Valve seat and safety valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105937654A true CN105937654A (en) | 2016-09-14 |
| CN105937654B CN105937654B (en) | 2018-09-07 |
Family
ID=56872304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610465237.6A Active CN105937654B (en) | 2016-06-23 | 2016-06-23 | Valve seat and safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105937654B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114593231A (en) * | 2020-12-04 | 2022-06-07 | 浙江盾安人工环境股份有限公司 | Reversing valve and refrigerating system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB800637A (en) * | 1955-06-06 | 1958-08-27 | Crosby Valve & Gage | Relief valves |
| US3796228A (en) * | 1972-08-25 | 1974-03-12 | A Bedo | Relief valve |
| CN201354873Y (en) * | 2009-02-26 | 2009-12-02 | 王华铭 | E series safety relief valve used for aluminium manufacturer channelization digestion system |
| CN102518845A (en) * | 2011-12-15 | 2012-06-27 | 赵全 | Triple-spring safety valve |
| CN202646818U (en) * | 2012-07-04 | 2013-01-02 | 浙江恒华阀门有限公司 | High-temperature high-pressure welding type safety valve |
| CN104455496A (en) * | 2014-10-30 | 2015-03-25 | 北京航天动力研究所 | Conical surface soft sealing structure for safety valve |
| CN205824368U (en) * | 2016-06-23 | 2016-12-21 | 深圳市特种设备安全检验研究院 | Valve seat and relief valve |
-
2016
- 2016-06-23 CN CN201610465237.6A patent/CN105937654B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB800637A (en) * | 1955-06-06 | 1958-08-27 | Crosby Valve & Gage | Relief valves |
| US3796228A (en) * | 1972-08-25 | 1974-03-12 | A Bedo | Relief valve |
| CN201354873Y (en) * | 2009-02-26 | 2009-12-02 | 王华铭 | E series safety relief valve used for aluminium manufacturer channelization digestion system |
| CN102518845A (en) * | 2011-12-15 | 2012-06-27 | 赵全 | Triple-spring safety valve |
| CN202646818U (en) * | 2012-07-04 | 2013-01-02 | 浙江恒华阀门有限公司 | High-temperature high-pressure welding type safety valve |
| CN104455496A (en) * | 2014-10-30 | 2015-03-25 | 北京航天动力研究所 | Conical surface soft sealing structure for safety valve |
| CN205824368U (en) * | 2016-06-23 | 2016-12-21 | 深圳市特种设备安全检验研究院 | Valve seat and relief valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114593231A (en) * | 2020-12-04 | 2022-06-07 | 浙江盾安人工环境股份有限公司 | Reversing valve and refrigerating system |
| CN114593231B (en) * | 2020-12-04 | 2024-03-15 | 浙江盾安人工环境股份有限公司 | Reversing valve and refrigerating system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105937654B (en) | 2018-09-07 |
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Effective date of registration: 20210923 Address after: 518005 agricultural science and technology building, No. 1085, south of chaguang Road, Xili street, Nanshan District, Shenzhen, Guangdong Patentee after: Shenzhen Institute of quality and safety inspection and testing Address before: Luohu District Honggang road Shenzhen City, Guangdong province 518029 Building No. 1032 special inspection Patentee before: SHENZHEN INSTITUTE OF SPECIAL EQUIPMENT INSPECTION AND TEST |