CN205504057U - Pressure relief valve - Google Patents
Pressure relief valve Download PDFInfo
- Publication number
- CN205504057U CN205504057U CN201620263180.7U CN201620263180U CN205504057U CN 205504057 U CN205504057 U CN 205504057U CN 201620263180 U CN201620263180 U CN 201620263180U CN 205504057 U CN205504057 U CN 205504057U
- Authority
- CN
- China
- Prior art keywords
- valve
- valve body
- pressure relief
- valve seat
- flap
- 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.)
- Active
Links
Abstract
The utility model relates to a pressure relief valve, which comprises the following components: a valve body, be equipped with matched with disk seat and valve clack in the valve pocket of valve body, the valve clack is equipped with supporting valve rod, the disk seat is including entry disk seat and export disk seat, valve body one end and flange fixed connection, the setting of export disk seat is in between valve body and the flange, its characterized in that media channel in valve clack, entry disk seat and the export disk seat all is squarely. The utility model discloses a media channel adopts the square hole passageway, and the scouring action of in -process to sealed face is being opened and close to reduction valve that can very big degree, increases the sealing performance of valve. Compare in the circular channel, square passageway can provide great flow area in the starting stage that the valve clack was opened and close, and the reduction medium erodees valve clack, valve seat seal face, increases the sealing performance of valve.
Description
Technical field
This utility model relates to a kind of pressure relief valve.
Background technology
Pressure relief valve is arranged on steam boiler superheater outlet to the main steam line of steam turbine, and it is opened pressure and is slightly below spring safety valve, it is possible to reduce the number of times of safety valve jumping up, the safety of protection system.Pressure relief valve is a kind of control panel, can switch Guan Bi be operated manually, it is also possible to be automatically brought into operation under specific unlatching and clossing pressure, it is provided that the most instant opening and closing.Pressure relief valve is typically made up of valve body, valve actuator, pressure transducer, pressure transmitter etc..
In the most domestic fired power generating unit, pressure relief valve is mainly based on imported valve, particularly evident in large sized unit (600MW and more than).Owing to fired power generating unit operating mode is severe, working environment is chronically at high-temperature high-pressure state so that run use in pressure relief valve often occur internal hemorrhage due to trauma, leak outside, the problem such as bite, had a strong impact on daily production operation.
Summary of the invention
In order to solve the problem that prior art exists, the purpose of this utility model is to provide a kind of pressure relief valve, by valve body sections is optimized improvement, it is provided that the pressure relief valve that a kind of performance is more excellent.
The technical solution of the utility model is:
A kind of pressure relief valve, including valve body, the valve seat matched and flap it is provided with in the valve pocket of described valve body, described flap is provided with supporting valve rod, described valve seat includes entrance valve seat and outlet valve seat, described valve body one end is fixing with flange to be connected, and described outlet valve seat is arranged between described valve body and flange, and the medium channel in described flap, entrance valve seat and outlet valve seat is all square.
It is additionally provided with butterfly spring between described entrance valve seat and described valve body.
Being provided with gasket seal between described outlet valve seat and valve body, described gasket seal is expanded graphite spacer.
Keyway it is provided with in described valve pocket, bonded between described entrance valve seat and described valve body.
Described valve body is that bolt is connected with the fixing connected mode of flange.
Described flap is spherical, and the top of described flap offers groove, and the bottom of described valve rod is set to and the flange shape of described fit depressions insert described groove.
It is provided with between the bottom of described valve rod with described valve body and is connected bearing, bearing shim, locking nut, the first packing ring and packing ring it is sequentially provided with above described connection bearing, described packing ring is arranged over gland, described gland is connected by hold-down bolt and described valve body are fixing, is provided with compression butterfly spring between nut and the described gland of described hold-down bolt.
The top of described valve rod is connected with top board, is provided with needle bearing between described valve rod and top board, is sequentially provided with semi-loop, the second packing ring and back-up ring above described needle bearing.
It is provided with connecting plate between described top board and described valve body, in described connecting plate, is provided with the through hole run through up and down, be provided with in described through hole for described top board is fixed, with described valve body, the fastening bolt being connected.
The raw material of described flap, entrance valve seat, outlet valve seat, butterfly spring and bearing shim is Ni-based INCONEL alloy.
The beneficial effects of the utility model are:
Valve mechanism of the present utility model takes quick change construction, bolt, the nut of described valve body with Flange joint only need to be pulled down by the dismounting of described valve internals, described valve body separates with flange, i.e. can be taken off all parts of described valve inner, dismantles and install very convenient.
This utility model have employed relatively advanced expanded graphite spacer, and good seal performance is safe and reliable.
Medium channel of the present utility model uses square hole passage, can reduce the valve souring to sealing surface in opening-closing process significantly, increases the sealing property of valve.Compared to circular channel, square duct can provide bigger circulation area in the starting stage that flap opens and closes, and reduces medium and washes away flap, sealing surface of seat, increases the sealing property of valve.
This utility model is by limiting the degree of freedom that flap, entrance valve seat and outlet valve seat rotate at circumferencial direction, avoid the occurrence of the generation of the access opening dislocation of flap and valve seat and the problems such as the valve that causes not exclusively is opened, valve opening and closing bite, thus ensure that steam flow channel is unimpeded, it is ensured that the advantage of square hole passage is embodied.
The raw material of flap of the present utility model, entrance valve seat, outlet valve seat, butterfly spring and bearing shim is Ni-based INCONEL alloy, surface all carries out cure process, sealing surface carries out grinding and grinding, to increase the erosion resistibility of valve internals, the problems such as the metal fever stress cracking that reduction high temperature and high pressure condition produces, improve valve seal performance.
Accompanying drawing explanation
Fig. 1 is structure diagram of the present utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawings this utility model is described further.
See Fig. 1, the utility model discloses a kind of pressure relief valve, including valve body 1, the valve seat matched and flap 4 it is provided with in the valve pocket of described valve body, described flap is provided with supporting valve rod 6, and described valve seat includes entrance valve seat 3 and outlet valve seat 26, and described valve body one end is fixing with flange 24 to be connected, described outlet valve seat is arranged between described valve body and flange, and the medium channel in described flap, entrance valve seat and outlet valve seat is all square.Square access opening is effectively reduced steam and washes away valve internals (including flap, entrance valve seat and outlet valve seat), increases the sealing property of valve.Compared to circular channel, square duct can provide bigger circulation area in the starting stage that flap opens and closes, and reduces medium and washes away flap, sealing surface of seat, increases the sealing property of valve, when valve opening 45%, now the circulation area of square duct is about 2 times of circular channel.
It is additionally provided with butterfly spring 2 between described entrance valve seat and described valve body, disc spring is constantly in compressive state, ensure the sealing of valve, in the case of the internals of valve is affected by high-temperature high-pressure medium and to expand and cause deformation, the close contact of valve seat and flap can be ensured by the compression of disc spring, prevent the leakage of high-temperature high-pressure medium.
Being provided with gasket seal 25 between described outlet valve seat and valve body, described gasket seal is expanded graphite spacer.The use of expanded graphite spacer, it is possible to achieve the quick-replaceable of valve internals, when internal hemorrhage due to trauma occurs in valve, can recover the normal use of valve the short time by changing spare part.The plane dimensional tolerance to be controlled of expanded graphite spacer contact, is also performed to grind, to reach the seal request of valve.
It is provided with keyway in described valve pocket, is connected by key 5 between described entrance valve seat and described valve body, thus limits the rotary freedom of described entrance valve seat, it is ensured that the sealing of valve.
Described valve body is that bolt is connected with the fixing connected mode of flange, is fastened the rotary freedom limiting described outlet valve seat by bolt 22 and nut 23, it is ensured that the sealing of valve.
Described flap is spherical, the top of described flap offers groove, the bottom of described valve rod is set to and the flange shape of described fit depressions insert described groove, by described valve rod can control described flap rotate along described valve fluid centerline direction, the appearance of the problem such as the link slot both sides crimp of flap and valve rod.
Described entrance valve seat carries out spacing with described valve body by flat key, described flap carries out spacing by valve rod head, described outlet valve seat carries out spacing by flange with valve body fastening, by limiting the degree of freedom that three above parts rotate at circumferencial direction, avoid the occurrence of the generation of the access opening dislocation of flap and valve seat and the problems such as the valve that causes not exclusively is opened, valve opening and closing bite, thus ensure that steam flow channel is unimpeded, it is ensured that the advantage of square hole passage is embodied.
It is provided with between the bottom of described valve rod with described valve body and is connected bearing, connect bearing and play the effect of location stem lower portion and the keying moment of valve can be reduced.Bearing shim 7, locking nut the 8, first packing ring 9 and packing ring 10 it is sequentially provided with above described connection bearing, the compression utilizing described locking nut substantially reduces the pressure at the packing ring above locking nut, it is possible to improve the sealing property at described valve stem packing position further.Described packing ring is arranged over gland 11, and described gland is connected by hold-down bolt 19 and described valve body are fixing, it is ensured that described flap and the axiality requirement at valve rod center.Compression butterfly spring 21 it is provided with between nut 20 and the described gland of described hold-down bolt, compress butterfly spring and ensure that this utility model is after a long time use, after some component undergoes deformation, by compressing the elastic deformation of disc spring, it is ensured that the sealing property between valve rod and valve body.
The top of described valve rod is connected with the endoporus of top board 18, is provided with needle bearing 14 between described valve rod and top board, and needle bearing can position valve rod top and can reduce the keying moment of valve, improves the stationarity of opening-closing process.Semi-loop the 15, second packing ring 16 and back-up ring 17 it is sequentially provided with above described needle bearing.
Connecting plate 12 it is provided with between described top board and described valve body, the through hole run through up and down it is provided with in described connecting plate, it is provided with for described top board to be fixed the fastening bolt 13 being connected with described valve body in described through hole, described fastening bolt is interior hexagonal alloy bolt, is guaranteed the axiality requirement of top board endoporus and valve rod by the fastening of fastening bolt.
The raw material of described flap, entrance valve seat, outlet valve seat, butterfly spring and bearing shim is Ni-based INCONEL alloy, the surface of above part all carries out cure process, sealing surface carries out grinding and grinding, to increase the erosion resistibility of valve internals, the problems such as the metal fever stress cracking that reduction high temperature and high pressure condition produces, improve valve seal performance.Described entrance valve seat, outlet valve seat, the grinding of flap use man-to-man lapping mode in groups, the most described entrance valve seat, outlet valve seat and flap not to have interchangeability.
Disclosed in this utility model each preferably with optional technological means, unless otherwise indicated and preferred or optional technological means is outside the limiting further of another technological means, all can form some different technical schemes in any combination.
Claims (10)
1. a pressure relief valve, including valve body, the valve seat matched and flap it is provided with in the valve pocket of described valve body, described flap is provided with supporting valve rod, described valve seat includes entrance valve seat and outlet valve seat, described valve body one end is fixing with flange to be connected, and described outlet valve seat is arranged between described valve body and flange, it is characterised in that the medium channel in described flap, entrance valve seat and outlet valve seat is all square.
2. pressure relief valve as claimed in claim 1, it is characterised in that be additionally provided with butterfly spring between described entrance valve seat and described valve body.
3. pressure relief valve as claimed in claim 2, it is characterised in that being provided with gasket seal between described outlet valve seat and valve body, described gasket seal is expanded graphite spacer.
4. pressure relief valve as claimed in claim 3, it is characterised in that be provided with keyway in described valve pocket, bonded between described entrance valve seat and described valve body.
5. pressure relief valve as claimed in claim 4, it is characterised in that described valve body is that bolt is connected with the fixing connected mode of flange.
6. pressure relief valve as claimed in claim 5, it is characterised in that described flap is spherical, and the top of described flap offers groove, the bottom of described valve rod is set to and the flange shape of described fit depressions insert described groove.
7. pressure relief valve as claimed in claim 6, it is characterized in that being provided with between the bottom of described valve rod and described valve body being connected bearing, bearing shim, locking nut, the first packing ring and packing ring it is sequentially provided with above described connection bearing, described packing ring is arranged over gland, described gland is connected by hold-down bolt and described valve body are fixing, is provided with compression butterfly spring between nut and the described gland of described hold-down bolt.
8. pressure relief valve as claimed in claim 7, it is characterised in that the top of described valve rod is connected with top board, is provided with needle bearing between described valve rod and top board, is sequentially provided with semi-loop, the second packing ring and back-up ring above described needle bearing.
9. pressure relief valve as claimed in claim 8, it is characterized in that being provided with connecting plate between described top board and described valve body, it is provided with the through hole run through up and down in described connecting plate, is provided with in described through hole for described top board is fixed, with described valve body, the fastening bolt being connected.
10. pressure relief valve as claimed in claim 9, it is characterised in that the raw material of described flap, entrance valve seat, outlet valve seat, butterfly spring and bearing shim is Ni-based INCONEL alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620263180.7U CN205504057U (en) | 2016-03-31 | 2016-03-31 | Pressure relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620263180.7U CN205504057U (en) | 2016-03-31 | 2016-03-31 | Pressure relief valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205504057U true CN205504057U (en) | 2016-08-24 |
Family
ID=56734853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620263180.7U Active CN205504057U (en) | 2016-03-31 | 2016-03-31 | Pressure relief valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205504057U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113864478A (en) * | 2021-10-09 | 2021-12-31 | 欧维克集团有限公司 | Drainage ball valve for high-temperature and high-pressure power station |
-
2016
- 2016-03-31 CN CN201620263180.7U patent/CN205504057U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113864478A (en) * | 2021-10-09 | 2021-12-31 | 欧维克集团有限公司 | Drainage ball valve for high-temperature and high-pressure power station |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103711931B (en) | Combination material High Temperature High Pressure deslagging ball valve | |
| CN205504057U (en) | Pressure relief valve | |
| CN116104950B (en) | Steam stop valve with combined valve clack | |
| CN202418668U (en) | Reversely-sealed valve capable of replacing packing on line | |
| CN104279358A (en) | High-temperature and high-pressure fuel gas safety valve | |
| CN206130210U (en) | Novel no water clock check valve | |
| CN212672406U (en) | Novel stop valve for high-temperature high-pressure large-caliber power plant | |
| CN106481833B (en) | A kind of high temperature cut-off valve hard sealing structure | |
| CN205918949U (en) | Pneumatic control valve | |
| CN205918950U (en) | Air -operated controller combination valve body mechanism | |
| CN209483968U (en) | Wedge shaped elastic flashboard double-sealing face high temperature cut-off valve | |
| CN208764389U (en) | A kind of extraction check valve | |
| CN201787162U (en) | Electromagnetic relief valve | |
| CN204201136U (en) | A kind of improved 670MW unit height row ventilation valve | |
| CN202561072U (en) | Hard-sealing spherical butterfly valve | |
| CN205918935U (en) | Air -operated controller combination valve body mechanism | |
| CN105650298A (en) | Dome valve | |
| CN206129549U (en) | 25 degrees pneumatic valves on reciprocating type technology compressor | |
| CN205026125U (en) | Hard seal structure of high temperature cut -off valve | |
| CN219159534U (en) | High side valve prevents interior hourglass structure | |
| CN203500546U (en) | All-metal sealing high-temperature high-pressure ball valve | |
| CN210566405U (en) | Combined sealing valve seat | |
| CN205173583U (en) | Special high performance swing check valve of natural gas | |
| CN203926866U (en) | Low-temperature brake valve | |
| CN109538779A (en) | Ball valve combined seal ring and ball valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |