CN202868292U - Throttling type drain valve - Google Patents
Throttling type drain valve Download PDFInfo
- Publication number
- CN202868292U CN202868292U CN 201220601914 CN201220601914U CN202868292U CN 202868292 U CN202868292 U CN 202868292U CN 201220601914 CN201220601914 CN 201220601914 CN 201220601914 U CN201220601914 U CN 201220601914U CN 202868292 U CN202868292 U CN 202868292U
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- China
- Prior art keywords
- valve
- type drain
- valve body
- throttling type
- drain valve
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- Expired - Fee Related
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Abstract
A throttling type drain valve comprises a valve body, a valve seat, a valve clack, a valve rod, a stuffing box, and a pneumatic device, wherein the valve body is connected with the valve seat in a welded mode, the valve clack is arranged in the valve body and connected with the lower end of the valve rod through threads, the stuffing box is arranged in the valve body, the upper portion of the valve rod is connected with the pneumatic device through connecting screws, and the valve body is connected with a receiving plate of the pneumatic device through a standing column. When the throttling type drain valve is successively developed and applied to a thermal power generating unit, good usability of the valve can be guaranteed, and more importantly, safety of an ultra-supercritical large-scale thermal generator set system is greatly improved. In addition, the throttling type drain valve can satisfy market requirements. Therefore, the market prospect and the technology popularization prospect of the throttling type drain valve are broad and the economic benefits and social benefits of the throttling type drain valve are obvious.
Description
Technical field
The utility model relates to a kind of throttling type drain valve, and is particularly a kind of for ultra supercritical fired power generating unit main steam system, hot reheat system, cold re-heating subsystem drain valve.
Background technique
Drain valve is one of key equipment that is applied to large-scale thermal power machine group main steam system, hot reheat system, cold re-heating subsystem, in order to the condensed water in the removal system e-quipment and pipe, air and other incoagulable gas, the quality of drain valve performance has vital effect for the normal operation of system, the raising of the gas utilization unit thermal efficiency and the aspects such as reasonable utilization of the energy.
Particularly in the situation that the primary energy such as coal, petroleum and natural gas reduce day by day, countries in the world government is all with energy saving with tap a new source of energy as important state basic policy.And delivery valve uses at steam and plays very important key effect aspect system energy-conservation.
Add up according to China relevant department; present national Automatic steam trap Trap owning amount is 432.4 ten thousand; because its structural imperfection; only has simple valve seat; the flap sealing; and do not have other to protect the sealing surface measure; at valve opening; at the beginning of closing; sealing surface washes away seriously; about 80% product does not reach existing NBS Steam loss less than 3% requirement; its leak-down rate is greatly about about 10%; such Automatic steam trap Trap is just wasted 4.44 tons of coals; the drain valve that does not reach existing NBS that is using in the whole nation is just wasted 1432.33 ten thousand tons of coals, amounts to 1,862,030,000 yuan of RMB, and this is an appreciable numeral; the energy-conserving action that this shows drain valve is big, and the important of status can not be regarded as unimportant in the national economic development.
Summary of the invention
The purpose of this utility model is exactly to be to overcome the drawback that above-mentioned prior art exists, and proposes the throttling type drain valve of a kind of reasonable in design, good airproof performance and long service life, with satisfy the thermal power generation unit to maximize, the demand of high parameter development.
For achieving the above object, the technical solution adopted in the utility model is: a kind of throttling type drain valve, it includes valve body, valve seat, flap, valve rod, Stuffing box, Pneumatic actuator, valve body and valve seat link together by welding manner, flap is positioned at valve body, is connected with the valve rod lower end by screw thread, and Stuffing box places in the valve body, valve rod top is connected with Pneumatic actuator by the attaching nut, and valve body is connected with the dish that connects of Pneumatic actuator by a root post.
In the flap bottom guiding throttle sleeve is installed.
Flap and valve rod joint are equipped with taper pin and are fixed.
The beneficial effects of the utility model are: throttling type drain valve sealing configuration has carried out significant improvement than traditional drain valve: guiding throttle sleeve structural design is adopted in the flap bottom, and throttling and sealing are separated; Sealing surface weld deposit is wear-resistant, Anti-erosion, antiscour and the higher STL6 material with good mechanical properties of hardness, and the conical seal (contact) face design makes less axial force just salable, reliable sealing can be provided and keep permanent working life; Throttle sleeve and valve seat bore radial clearance are less simultaneously; in the valve opening closing process; flap guiding throttle sleeve position enters after the valve seat bore passage; good leading role is played in the keying of valve; effectively eliminate the bad reaction that all sides cause; can eliminate stuck because of various stressed improper generations; galled spots, valve rod is crooked, the phenomenons such as flap chatter; simultaneously the pipeline medium is formed certain throttling action; reduce medium to the washing away of sealing surface, thereby protected sealing surface to greatest extent, improved the sealability of valve; improve the working life of product, guaranteed the normal operation of system.
Stuffing box is arranged in the valve body, compact structure.Stem packing adopts the enhancing Expanded graphite to add the establishment Expanded graphite, can play best leak preventing effect, and durable in use, easy accessibility.Adopt Pneumatic actuator as actuator,, safety, effective accurate to the control of valve.
Along with the fast development of State Grid's industry, the contradiction that energy consumption is excessive.For reducing to greatest extent the consumption of non-renewable resources-coal, subcritical from 300MW, 600MW and the supercritical unit of national thermoelectric generator kludge capacity develops to 1000MW ultra supercritical unit.
The design success of throttling type drain valve, having solved the original structure sealing surface washes away seriously, leak-down rate is high, can not satisfy the drawback of system's operation demand, is the important step that ensures the safe operation of the overcritical and ultra supercritical large-scale thermal power machine group system such as China 600MW, 1000MW.Fired power generating unit is developed and is applied in the success of such valve, not only can guarantee the usability that valve is good, and what is more important will improve ultra supercritical large-scale thermal power machine group system Operation safety greatly, and can meeting the market requirement.Therefore, market and the Technique Popularizing prospect of this model utility invention are very wide, and its economical, societal benefits are extremely remarkable.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is A shown in Figure 1 place enlarged view.
Embodiment
Below in conjunction with accompanying drawing the utility model is further elaborated.
As shown in Figure 1 and Figure 2, a kind of throttling type drain valve, it includes valve body 1, valve seat 2, flap 3, valve rod 4, Stuffing box 6, Pneumatic actuator 5, valve body 1 and valve seat 2 link together by welding manner, flap 3 is positioned at valve body 1, is connected with valve rod 4 lower ends by screw thread, and Stuffing box 6 places in the valve body 1, valve rod 4 tops are connected with Pneumatic actuator 5 by attaching nut 7, and valve body 1 is connected with the dish that connects of Pneumatic actuator 5 by a root post 8.
Guiding throttle sleeve 31 is installed in flap 3 bottoms.
Flap 3 is equipped with taper pin 32 with valve rod 4 joints and is fixed.
In the throttling type drain valve opening-closing process, the Pneumatic actuator actuate valve stem drives flap and upwards moves downward, after valve seat and valve clack sealing surface are thrown off, the pressure of high pressure steam will push flap, may cause washing away of the loosening and sealing surface of flap valve rod connecting thread, but owing to be provided with taper pin, prevented the loosening of screw thread; Simultaneously, the flap below arranges the guiding throttle sleeve, not only good leading role is played in the keying of valve, effectively eliminate the bad reaction that all sides cause, eliminated stuck because of various stressed improper generations, galled spots, valve rod is crooked, the phenomenons such as flap chatter; Simultaneously medium is formed certain throttling action, effectively prevented high-pressure medium to washing away that sealing surface causes, thereby protected sealing surface to greatest extent, improved the sealability of valve, improved the working life of product, guaranteed the normal operation of system.
Claims (3)
1. throttling type drain valve, it is characterized in that: it includes valve body (1), valve seat (2), flap (3), valve rod (4), Stuffing box (6), Pneumatic actuator (5), valve body (1) links together by welding manner with valve seat (2), flap (3) is positioned at valve body (1), be connected with valve rod (4) lower end by screw thread, Stuffing box (6) places in the valve body (1), valve rod (4) top is connected with Pneumatic actuator (5) by attaching nut (7), and valve body (1) is connected with the dish that connects of Pneumatic actuator (5) by a root post (8).
2. a kind of throttling type drain valve according to claim 1 is characterized in that: guiding throttle sleeve (31) is installed in flap (3) bottom.
3. a kind of throttling type drain valve according to claim 1 is characterized in that: flap (3) is equipped with taper pin (32) with valve rod (4) joint and is fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220601914 CN202868292U (en) | 2012-11-15 | 2012-11-15 | Throttling type drain valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220601914 CN202868292U (en) | 2012-11-15 | 2012-11-15 | Throttling type drain valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202868292U true CN202868292U (en) | 2013-04-10 |
Family
ID=48035009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220601914 Expired - Fee Related CN202868292U (en) | 2012-11-15 | 2012-11-15 | Throttling type drain valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202868292U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105649960A (en) * | 2014-11-12 | 2016-06-08 | 大亚湾核电运营管理有限责任公司 | Fire detection system, air source supply unit thereof, flow controller and dewatering method |
| CN112923122A (en) * | 2021-01-19 | 2021-06-08 | 沂源县华阳能源设备有限公司 | Novel valve rod sealing device |
-
2012
- 2012-11-15 CN CN 201220601914 patent/CN202868292U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105649960A (en) * | 2014-11-12 | 2016-06-08 | 大亚湾核电运营管理有限责任公司 | Fire detection system, air source supply unit thereof, flow controller and dewatering method |
| CN112923122A (en) * | 2021-01-19 | 2021-06-08 | 沂源县华阳能源设备有限公司 | Novel valve rod sealing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130410 Termination date: 20131115 |