CN203477358U - Self-sealing high-pressure steam control valve - Google Patents
Self-sealing high-pressure steam control valve Download PDFInfo
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- CN203477358U CN203477358U CN201320554339.7U CN201320554339U CN203477358U CN 203477358 U CN203477358 U CN 203477358U CN 201320554339 U CN201320554339 U CN 201320554339U CN 203477358 U CN203477358 U CN 203477358U
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- valve body
- pressure steam
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Abstract
The utility model relates to a self-sealing high-pressure steam control valve which is good in sealing performance, simple in structure and low in manufacturing cost. According to the technical scheme, the self-sealing high-pressure steam control valve comprises a valve body with a steam inlet and a steam outlet, an upper valve seat, a lower valve seat, a valve rod, an upper valve clack, a lower valve clack, a power mechanism, an upper valve cover and a lower valve cover, wherein the upper valve seat and the lower valve seat are arranged in the valve body, the valve rod is located in the valve body and can move along the axis of the valve rod, the upper valve clack and the lower valve clack are arranged on the valve rod and are matched with the upper valve seat and the lower valve seat respectively, the power mechanism drives the valve rod to move, and the upper valve cover and the lower valve cover are arranged at the upper end and the lower end of the valve body respectively. The self-sealing high-pressure steam control valve is characterized in that a sealing ring is further located between the outer circumferential face of the upper valve cover and the inner circumferential face of the valve body, the bottom end of the sealing ring is supported by a protruding ring on the outer circumferential face of the upper valve cover, and the top end of the sealing ring is provided with a blocking ring which is locate on the inner circumferential face of the valve body to carry out axial limiting on the valve body.
Description
Technical field
The utility model relates to a kind of machinery, especially a kind of high pressure steam control valve.
Background technique
High pressure steam control valve is a kind of broad-spectrum control valve, the high pressure steam that is mainly used in power station, thermoelectricity plant or boiler to carry reduces pressure, its working principle be adopt the aperture of the open-shut device in valve body regulate medium flow so that the pressure after valve keep within the specific limits.But in existing control valve, the binding site of bonnet and valve body produces the problem of seal failure sometimes, the in the situation that of the abnormal change of high pressure steam, can not stably maintain the vapor pressure in valve body, affect the normal operation of upstream device, need further improvement.
Model utility content
The purpose of this utility model is the deficiency overcoming in above-mentioned background technology, and a kind of self-packing high pressure steam control valve is provided, and this control valve should have advantages of good seal performance, simple in structure and manufacture cost is lower.
The technical solution of the utility model is: a kind of self-packing high pressure steam control valve, comprise be shaped with steam inlet and steam (vapor) outlet valve body, be arranged on upper valve base and lower valve base in valve body, be positioned in valve body and the valve rod that can move along self axis, be formed on valve rod and the upper flap matching with upper valve base and the lower Disc matching with lower valve base, drive power mechanism, the bonnet that is arranged on respectively the upper and lower two ends of valve body and the bottom flange of stem movement; It is characterized in that: between the outer peripheral surface of bonnet and valve body inner peripheral surface, also locate a seal ring, the bottom of seal ring is by the bulge loop holding of bonnet outer peripheral surface, and the top of seal ring is so that it is carried out to the back-up ring of axial limiting on a positioning valve inner peripheral surface.
One filler briquetting is also set between described back-up ring and seal ring.
The upper-end surface of described bulge loop is up-small and down-big outer conical surface, and the bottom end face of seal ring is the internal conical surface coordinating with it.
Described upper valve base is also furnished with an axial adjustment structure; This regulation structure comprise one be fixed on upper valve base and at the retainer ring of described back-up ring top, be shelved on bracing ring between retainer ring and back-up ring and several and from top to bottom vertically passed through the screw on retainer ring after top be pressed in the adjusting screw rod on bracing ring.
The beneficial effects of the utility model are:
Bonnet in the utility model and seal ring have adopted self-packing structure; Sealability when control valve internal pressure is higher between bonnet and seal ring is just better, thereby is stably maintained the vapor pressure in valve body, guarantees the normally operation of upstream device safety; In addition, structure of the present utility model is comparatively simple, and manufacture cost is also lower.
Accompanying drawing explanation
Fig. 1 is main TV structure schematic diagram of the present utility model.
Fig. 2 is the structure for amplifying schematic diagram of A portion in Fig. 1.
Embodiment
Below in conjunction with Figure of description, the utility model is described in further detail, but the utility model is not limited to following examples.
As shown in Figure 1, a self-packing high pressure steam control valve, comprises valve body 1, is positioned in valve body and the valve rod 2 that can move along self axis, the power mechanism 3 that drives stem movement and bonnet 4-1 and the bottom flange 4-2 that is arranged on respectively the upper and lower two ends of valve body; On valve body, be shaped with upper valve base 1-5 and lower valve base 1-6 are also installed in steam inlet 1-1 and steam (vapor) outlet 1-2 and valve body; On valve rod, be shaped with respectively the upper flap 2-1 matching with upper valve base and the lower Disc 2-2 matching with lower valve base.
Improvement of the present utility model is as follows:
As shown in Figure 2, between the outer peripheral surface of bonnet and valve body inner peripheral surface, also locate a seal ring 5, the bottom of seal ring is by the bulge loop 4-3 holding of bonnet outer peripheral surface, and the top of seal ring is on a positioning valve inner peripheral surface, (to embed in the groove of valve body inner peripheral surface) back-up ring 7 that moves (seal ring is carried out to axial limiting) to stop on seal ring axis.
One filler briquetting 6 is also set between described back-up ring and seal ring; Back-up ring bears the axis pressure of the seal ring being transmitted by this material briquetting.
The upper-end surface of described bulge loop is up-small and down-big outer conical surface, and the bottom end face of seal ring is the internal conical surface coordinating with it.Like this, bonnet can form and closely cooperate with seal ring under the effect of vapor pressure; When in control valve, vapor pressure is higher, bonnet is just tightr with coordinating of seal ring, thereby forms selfsealings state, therefore can stably maintain the vapor pressure in valve body, guarantees the normally operation of upstream device safety.
In figure, also show: described upper valve base is also furnished with an axial adjustment structure; In this regulation structure: retainer ring 9 is fixed on upper valve base by embedding the mode of upper valve base groove, and is positioned at described back-up ring top; Bracing ring 8 is arranged between retainer ring and back-up ring; On retainer ring, be also manufactured with the screw that several are vertically arranged, several adjusting screw rods 10 from top to bottom vertically passed through after the screw of retainer ring, then top is pressed on bracing ring.Obviously, turn screw rod, upper valve base will produce along valve rod axis direction mobile, and then reaches adjusting object.
In Fig. 2, be also shown in a seal spool adjusting part; This assembly comprises one group of stuffing box packing 11-5 being set between valve rod and upper valve base, be positioned at stuffing box packing upper end and by gland 11-1 to the spacing pull bar 11-2 of stuffing box packing and be fixed on and on described retainer ring 9 and by screw-rod structure, pull bar applied the screw rod 11-4 of downforce; In described screw-rod structure, the bottom of screw rod 11-4 is hingedly fixed on retainer ring, and the top of screw rod was up passed through after the through hole on pull bar, is tightened again with the nut 11-3 matching.Obviously, turn nut 11-3, the axial pressure that stuffing box packing 11-5 is subject to will change, and sealability is also just adjusted.
In addition, steam inlet and steam (vapor) outlet adopt not isometrical design, be that (1-2 that the diameter of steam (vapor) outlet is about steam inlet diameter doubly for the diameter of the steam (vapor) outlet diameter that is greater than steam inlet, when multiple is 1.33, using effect is best), contribute to improve the installation efficiency (without separately joining transition pipe joint) of control valve and reduce user cost; Valve body adopts 15Cr1Mo1V material foundry goods; The crucial flow passage parts such as upper valve base and lower valve base, upper flap and lower Disc all adopt that wear-resisting property is good, the 12Cr18Ni9 material forging of long service life; Bonnet and bottom flange adopt 12Cr1MoV material forging.
The utlity model has good Flow-rate adjustment control characteristic and higher safe operation coefficient, adjustment range is larger and durable in use, after many user tests are used, has all obtained good using effect.
Claims (4)
1. a self-packing high pressure steam control valve, comprise be shaped with steam inlet (1-1) and steam (vapor) outlet (1-2) valve body (1), be arranged on upper valve base (1-5) and lower valve base (1-6) in valve body, be positioned in valve body and the valve rod (2) that can move along self axis, be formed on the upper flap (2-1) matching on valve rod and with upper valve base and the lower Disc (2-2) matching with lower valve base, drive power mechanism (3), the bonnet (4-1) that is arranged on respectively the upper and lower two ends of valve body and the bottom flange (4-2) of stem movement; It is characterized in that: between the outer peripheral surface of bonnet and valve body inner peripheral surface, also locate a seal ring (5), the bottom of seal ring is by bulge loop (4-3) holding of bonnet outer peripheral surface, and the top of seal ring is it is carried out to the back-up ring (7) of axial limiting on a positioning valve inner peripheral surface.
2. a kind of self-packing high pressure steam control valve according to claim 1, is characterized in that: a filler briquetting (6) is also set between described back-up ring and seal ring.
3. a kind of self-packing high pressure steam control valve according to claim 2, is characterized in that: the upper-end surface of described bulge loop is up-small and down-big outer conical surface, and the bottom end face of seal ring is the internal conical surface coordinating with it.
4. a kind of self-packing high pressure steam control valve according to claim 3, is characterized in that: described upper valve base is also furnished with an axial adjustment structure; This regulation structure comprise one be fixed on upper valve base and be positioned at described back-up ring top retainer ring (9), be shelved on bracing ring (8) between retainer ring and back-up ring and several and from top to bottom vertically passed through the screw on retainer ring after top be pressed in the adjusting screw rod (10) on bracing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320554339.7U CN203477358U (en) | 2013-09-06 | 2013-09-06 | Self-sealing high-pressure steam control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320554339.7U CN203477358U (en) | 2013-09-06 | 2013-09-06 | Self-sealing high-pressure steam control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203477358U true CN203477358U (en) | 2014-03-12 |
Family
ID=50225689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320554339.7U Expired - Fee Related CN203477358U (en) | 2013-09-06 | 2013-09-06 | Self-sealing high-pressure steam control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203477358U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167461A (en) * | 2018-01-31 | 2018-06-15 | 黑龙江北方阀业有限责任公司 | It is a kind of to idle discharge steam valve |
| CN110159765A (en) * | 2019-05-29 | 2019-08-23 | 宁波文泽机电技术开发有限公司 | A kind of regulating valve |
-
2013
- 2013-09-06 CN CN201320554339.7U patent/CN203477358U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167461A (en) * | 2018-01-31 | 2018-06-15 | 黑龙江北方阀业有限责任公司 | It is a kind of to idle discharge steam valve |
| CN110159765A (en) * | 2019-05-29 | 2019-08-23 | 宁波文泽机电技术开发有限公司 | A kind of regulating valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140312 Termination date: 20190906 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |