CN203363642U - Thermal-insulation-type combined steam drain valve with spherical sealing stop valve body - Google Patents
Thermal-insulation-type combined steam drain valve with spherical sealing stop valve body Download PDFInfo
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- CN203363642U CN203363642U CN 201320300474 CN201320300474U CN203363642U CN 203363642 U CN203363642 U CN 203363642U CN 201320300474 CN201320300474 CN 201320300474 CN 201320300474 U CN201320300474 U CN 201320300474U CN 203363642 U CN203363642 U CN 203363642U
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- drain valve
- stop valve
- valve body
- steam
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Abstract
The utility model relates to a steam drain valve, in particular to a thermal-insulation-type combined steam drain valve with a spherical sealing stop valve body. The thermal-insulation-type combined steam drain valve comprises a valve body, the manual stop valve body and a drain valve body, wherein the manual stop valve body and the drain valve body are connected to the valve body. The drain valve body comprises a steam channel for communicating an inlet end and an outlet end, a drain valve base, a valve plate and an inner gland, wherein the drain valve base, the valve plate and the inner gland are sequentially arranged above the steam channel and communicated with the steam channel. A steam filter screen is arranged in a downwards-inclined cavity of the inlet end of the valve body, an outer gland is arranged outside the inner gland, and a thermal insulation cavity is formed between the inner gland and the outer gland. A valve plug for blocking the steam channel in a stop valve base of the manual stop valve body is a spherical valve plug, and the upper end of the spherical valve plug is connected with a corrugated pipe assembly. Due to the design of the spherical valve plug and the thermal insulation cavity, the durability, the reliability and the advancement of the combined steam drain valve can be guaranteed, the working performance of the combined steam drain valve is greatly improve, and the service life of the combined steam drain valve is greatly prolonged.
Description
Technical field
The utility model relates to a kind of Automatic steam trap Trap, is specifically related to a kind of combined steam trap of the heat insulation type with the sphere sealed stop valve.
Background technique
The steam pipework draining system is mainly used in power plant, when starting or shut down, the solidifying water in stream passageway and steam is blown down and drain into tank, with use to be recycled.By blowing down pipeline, the air in stream passageway is drained on the one hand, reduce oxygen corrosion to power plant pipeline and device interior under the condition of high temperature; Also the solidifying water in stream passageway can be blown down, eliminate " water attack " of solidifying water to turbine blade and valve simultaneously; When shutting down, steam and ponding that pipeline is gathered are thinning out, and alleviate the internal corrosion of ponding to stream passageway under outage state.The subject matter that stop valve on existing high pressure steam passage and drain valve exist: 1, the life-span shorter, generally can only use some months.When reason is the work of stream passageway purging system, before and after stop valve, steam pressure difference is large, flow velocity is high, steam is very serious to washing away with corrosion of valve head valve seat, cause blowoff pressure sharply to increase, not only increased the thermal radiation in cabin, caused cabin temperature to raise, and cause the drain water piping serious steam leakage; 2, be subject to that large pressure reduction washes away and after corrosion causes damaging when stop valve, if change not in time, resistance steam valve meeting frequent movement, make stream passageway produce larger leakage vapour, and a large amount of steam is drained by drain water piping, the steam turbine steam consumption is reduced, reduced the efficiency of power plant, simultaneously, the steam-condensation Cheng Shui leaked outside, bilge ponding is increased the weight of, accelerated the corrosion of the bilge and below deck equipment; 3, leak vapour and can wash away vapour condenser, easily cause the vapour condenser pipe to break; 4, the valve body of resistance vapour drain valve is exposed to outer and directly contacts with the external world, during work, be subject to the external environment temperature difference influence very big, enter steam in valve body very quick setting become condensed water, thereby wash valve block open and open the outside draining of hydrophobic channel (vapour), be easy to frequent movement, cause vapour losses, the resistance vapour drain valve of this structure opposing external environment temperature difference interference performance a little less than, energy-efficient performance is poor; 5,, without steam filter screen, very easily cause drain water piping to stop up.
Summary of the invention
The purpose of this utility model is exactly the deficiency existed in order to solve the above-mentioned background technology, provides that a kind of operating frequency is low, good seal performance, the combined steam trap of the heat insulation type with the sphere sealed stop valve that reliability is higher.
The technical solution adopted in the utility model is: a kind of combined steam trap of the heat insulation type with the sphere sealed stop valve, comprise valve body, be connected to hand stop valve and drain valve on valve body, described drain valve comprises the stream passageway that is communicated with entrance point and outlet end and is successively set on drain valve valve seat, valve block, the internal gland be communicated with stream passageway above stream passageway, be provided with steam filter screen in the declivity cavity of described valve body entrance point, described internal gland outside is provided with outer press cover, forms the incubation cavity communicated with stream passageway between internal gland and outer press cover; The valve plug that intercepts stream passageway in the seat of stop valve of described hand stop valve is spherical valve plug, and spherical valve is held the connection bellows component beyond the Great Wall.
Further, between described internal gland and outer press cover and drain valve valve seat, all by stuffing box packing, seal.
Further, described outer press cover bottom is provided with fixing frame, and internal gland is fixed on outer press cover inside by fixing frame, and described outer press cover is fixedly connected with the drain valve valve seat by bolt.
Further, described drain valve horizontal positioned is installed, between described hand stop valve and drain valve with arbitrarily angled installation.
Further, form the sealing loop wire between the spherical of described spherical valve plug and seat of stop valve.
Further, but a side of the stream passageway on described steam filter screen top is provided with the joint of setting pressure table.
The utility model can be guaranteed serviceability, reliability, the advance of this combination drain valve by Multiple Optimization Design, has greatly improved service behaviour and the working life of combination drain valve.Combination drain valve internal structure is without easily worn parts such as spring, no floating balls, and dismounting is easy to maintenance, and functional reliability is good.Stop valve is inner adopts spherical valve plug sealing, can realize arbitrarily angledly can sealing fully under stressed better tightness; Drain valve is placed in the insulation cylindrical shell and forms all risk insurance temperature structure, greatly improve anti-extraneous temperature difference interference performance, operating frequency reduces this to reducing vapour losses, preventing that the valve passage obstruction has remarkable result.
Adopted spherical valve plug in stop valve of the present utility model, spherical valve plug has formed the complete loop wire that contacts with valve base chamber, all power of closing all concentrates on narrower sealing loop wire, even valve rod is not at center line, still can guarantee it is the loop wire contact, thereby strengthen sealing.This kind simple in structure, be not afraid of to a certain extent wearing and tearing, growth along with service time, actual wear increases the valve opening diameter of seat of stop valve slightly, more the tightness of wearing and tearing can be better, because, along with the increase of friction, globe disk will more and more in depth be absorbed in valve seat, has guaranteed good sealing.Spherical valve section beyond the Great Wall adopts the bellows force structure, can change during fabrication the bellows number of metal according to vapor pressure, can meet different vapor pressure needs.
The utility model in the upper design of drain valve heat preservation zone.Hydrophobic valve block is placed in incubation cavity, make inside and outside valve body all in Isothermal Condition, the steam only remained in heat-insulated cavity is slowly lowered the temperature while condensing into water, steam in valve pocket just can be lowered the temperature thereupon, condense into water and make the valve block decompression automatically open hydrophobic channel, greatly improved anti-extraneous temperature difference interference performance, reduced open frequency, and then carry out centralized drainage, there is positive effect working life to reducing vapor stream damage, energy saving and prolongation drain valve.
Because stream passageway inside is dirtier, the utility model is equipped with filter screen in the import of combined steam drain valve, solved well because dirty blocking up causes stop valve and drain valve damage in advance or are not closed completely, avoid drain water piping to stop up, guarantee hydrophobic unimpededly, can greatly extend the valve whole service life; Simultaneously, designed the pulse joint after filter screen, but the setting pressure table is monitored to filter network state.
Being connected and can need to carrying out the Optional assembling welding according to erecting bed between the utility model hand stop valve and drain valve, hand stop valve can 360 ° of assemblings, and drain valve keeps level; Also can adopt the dispersion absolute construction.
The accompanying drawing explanation
Fig. 1 is longitudinal sectional drawing of the present utility model.
The longitudinal sectional drawing that Fig. 2 is the utility model heat preservation hot power type resistance steam valve.
The longitudinal sectional drawing that Fig. 3 is the cylindrical ripple pipe of the utility model and ball valve assembly.
The longitudinal sectional drawing that Fig. 4 is the utility model stop valve and steam filter screen.
Wherein: the 1-hand stop valve; The 2-bellows component; The spherical valve plug of 3-; The 4-seat of stop valve; The 5-entrance point; The 6-valve body; The 7-steam filter screen; The 8-joint; The 9-stream passageway; The 10-outlet end; 11-drain valve valve seat; The 12-valve block; The 13-internal gland; The 14-outer press cover; The 15-fixing frame; The 16-incubation cavity; The 17-stuffing box packing; The 18-bolt.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, is convenient to be well understood to the utility model, but they do not form and limit the utility model.
As Figure 1-4, the utility model comprises valve body 6, is connected to hand stop valve 1 and drain valve on valve body 6, and described drain valve horizontal positioned is installed, between described hand stop valve and drain valve with arbitrarily angled installation.Described drain valve comprises the stream passageway 9 that is communicated with entrance point 5 and outlet end 10 and is successively set on drain valve valve seat 11, valve block 12, the internal gland 13 that stream passageway 9 tops are communicated with stream passageway 9, be provided with steam filter screen 7 in the declivity cavity of described valve body 6 entrance points, but a side of the stream passageway on steam filter screen 7 tops is provided with the joint 8 of setting pressure table.Described internal gland 13 outsides are provided with outer press cover 14, form the incubation cavity 16 communicated with stream passageway 9 between internal gland 13 and outer press cover 14; Between described internal gland 13 and outer press cover 14 and drain valve valve seat 11, all by stuffing box packing 17, seal.Described outer press cover 14 bottoms are provided with fixing frame 15, and internal gland 13 is fixed on outer press cover 14 inside by fixing frame 15, and described outer press cover 14 is fixedly connected with drain valve valve seat 11 by bolt 18.The valve plug of the interior obstruct stream passageway of seat of stop valve 4 of described hand stop valve 1 is spherical valve plug 3, and spherical valve plug 3 upper ends connect bellows component 2.Form the sealing loop wire between the spherical of described spherical valve plug 3 and seat of stop valve 4.
Working principle of the present utility model is, as shown in Figure 1, when stream passageway starts to accept steaming plant preparation warming-up, operator open hand stop valve, ducted air and steam (solidifying water) are at first by the steam filter screen of stop valve bottom, along passage, by ball valve, a part enters in the incubation cavity of drain valve top, prevents that the extraneous temperature difference interference from causing the drain valve frequent movement; Major part enters drain valve valve block lower space, according to " power " pressure reduction between cryogenic condensation water and high speed flash-off steam, carrys out work.Occur cooling water of condensation in valve pocket, water of condensation is pushed valve block open by working pressure, rapidly discharge.Complete when the water of condensation discharge, steam discharges subsequently, because steam is larger than the volume of water of condensation and flow velocity, makes valve block produce up and down pressure reduction, and valve block is closed rapidly under the suction of steam flow rate, and steam is stored in stream passageway and is not wasted.When valve block is closed, valve block is subject to two surface pressures, and the lifting surface area below valve block is less than top lifting surface area, because of the source pressure of drain valve steam chest the inside in vapor pressure, so above valve block below stressed being greater than, valve block is closed tightly.Along with the continuous water of condensation of lowering the temperature into of condensed water in high temperature in valve pocket, the pressure of valve pocket the inside disappears.Water of condensation is pushed valve block open by working pressure, and water of condensation continues again discharge, and periodic duty is interrupted draining.After equipment is out of service, operator should close hand stop valve in time, and the combination drain valve is deactivated.Even forgetting, operator close stop valve, the constantly repetitive operation of resistance vapour drain valve, and due to insulation effect being arranged, it can frequently not opened, and does not have a large amount of vapo(u)r escapes, causes excessive thermal loss.
The content be not described in detail in this specification belongs to the known prior art of professional and technical personnel in the field.
Claims (6)
1. the combined steam trap of the heat insulation type with the sphere sealed stop valve, comprise valve body (6), be connected to hand stop valve (1) and drain valve on valve body, described drain valve comprises the stream passageway (9) that is communicated with entrance point (5) and outlet end (10) and is successively set on the drain valve valve seat (11) be communicated with stream passageway above stream passageway (9), valve block (12), internal gland (13), it is characterized in that: be provided with steam filter screen (7) in the declivity cavity of described valve body entrance point, described internal gland (13) outside is provided with outer press cover (14), form the incubation cavity (16) communicated with stream passageway between internal gland (13) and outer press cover (14), the valve plug that intercepts stream passageway in the seat of stop valve (4) of described hand stop valve (1) is spherical valve plug (3), and spherical valve plug (3) upper end connects bellows component (2).
2. a kind of combined steam trap of the heat insulation type with the sphere sealed stop valve according to claim 1, is characterized in that: between described internal gland (13) and outer press cover (14) and drain valve valve seat (11), all by stuffing box packing (17), seal.
3. a kind of combined steam trap of the heat insulation type with the sphere sealed stop valve according to claim 2, it is characterized in that: described outer press cover (14) bottom is provided with fixing frame (15), internal gland (13) is fixed on outer press cover (14) inside by fixing frame (15), and described outer press cover (14) is fixedly connected with drain valve valve seat (11) by bolt (18).
4. a kind of combined steam trap of the heat insulation type with the sphere sealed stop valve according to claim 1 is characterized in that: described drain valve horizontal positioned is installed, between described hand stop valve and drain valve with arbitrarily angled installation.
5. a kind of combined steam trap of the heat insulation type with the sphere sealed stop valve according to claim 1, is characterized in that: form the sealing loop wire between the spherical of described spherical valve plug (3) and seat of stop valve (4).
6. a kind of combined steam trap of the heat insulation type with the sphere sealed stop valve according to claim 1 is characterized in that: described steam filter screen (7) but a side of the stream passageway on top is provided with the joint (8) of setting pressure table.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320300474 CN203363642U (en) | 2013-05-28 | 2013-05-28 | Thermal-insulation-type combined steam drain valve with spherical sealing stop valve body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320300474 CN203363642U (en) | 2013-05-28 | 2013-05-28 | Thermal-insulation-type combined steam drain valve with spherical sealing stop valve body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203363642U true CN203363642U (en) | 2013-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320300474 Expired - Fee Related CN203363642U (en) | 2013-05-28 | 2013-05-28 | Thermal-insulation-type combined steam drain valve with spherical sealing stop valve body |
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| CN (1) | CN203363642U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104456056A (en) * | 2014-12-08 | 2015-03-25 | 章华 | Condensed water drainage structure on outlet side of steam top-discharging safety relief valve |
-
2013
- 2013-05-28 CN CN 201320300474 patent/CN203363642U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104456056A (en) * | 2014-12-08 | 2015-03-25 | 章华 | Condensed water drainage structure on outlet side of steam top-discharging safety relief valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131225 Termination date: 20170528 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |