CN205155236U - Improved generation H type automatic recycling control valve - Google Patents
Improved generation H type automatic recycling control valve Download PDFInfo
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- CN205155236U CN205155236U CN201520883814.4U CN201520883814U CN205155236U CN 205155236 U CN205155236 U CN 205155236U CN 201520883814 U CN201520883814 U CN 201520883814U CN 205155236 U CN205155236 U CN 205155236U
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- valve
- bypass
- bypass valve
- major loop
- seat
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Abstract
The utility model discloses an improved generation H type automatic recycling control valve, include: a valve body, a valve gap that is located valve body end, the valve body is including major loop and branch road, the major loop with branch road department is provided with the bypass valve, the bypass valve nestification sets up in the major loop in the valve body, the bypass valve includes a bypass disk seat cover, a little valve clack that lies in bypass valve seat cover one end to an and main valve lamella that is located the bypass valve seat cover other end, main valve lamella tip still is provided with elastic component, when the valve body did not start, elastic component and bypass valve self gravity blocked up the passageway of major loop. The utility model discloses enabling the pump in underrun in a small amount medium recycling occasionally, guaranteeing the minimum flow of pump, the steady operation of holding pump prevents that the mercury vapour from losing to seal damage, vibrations etc. Opportunity with the medium temperature rising. And have the non return function, prevent the medium refluence.
Description
Technical field
The utility model relates to a kind of modified model H type automatic recirculating control valve, is installed on centrifugal pump delivery side of pump, centrifugal pump is provided to most economical, protects the most reliably.
Background technique
Along with the continuous increase of energy-saving and emission-reduction project, as directly energy-conservation pump-protecting valve-automatic recirculating control valve, constantly used with reconstruction project newly-built, the advantage that automatic recirculating control valve has is many: multi-purpose valve, a valve instead of a conventional recirculating system (including complete main road safety check, bypass control valve (BCV)); Main road safety check provides instant protection to pump, and it opens with bypass is reliable mechanical linkage, ensures the capacity of reflux that pump needs at any time; Complete hydraulic pressure, mechanical self-supporting energy design, the mechanism that need not safeguard; This valve is loaded on conventional system, does not need to carry out large change, only this valve is loaded on former check valve location, and by-pass governing valve port and circulation loop is connected, and cancels all the other additional devices.
At present, according to product performance requirement, define 4 kinds of structural types gradually: A type, Type B, C type, D type.But in recent years, along with market demands are more and more stricter, require that bypass leakage current is zero, existing A type, Type B, structure can not meet the demand, therefore develop H type one and substitute A type, Type B.
Model utility content
The technical problems to be solved in the utility model is to provide a kind of modified model H type automatic recirculating control valve, pump can be made when underrun to have medium re-circulation in a small amount, ensure the minimum discharge of pump, the stable operation of holding pump, prevent pump cavitation and medium temperature from raising envelope damage, vibrations on opportunity etc.And there is check function, prevent medium from flowing backwards.
For achieving the above object, the technical solution of the utility model is as follows:
A kind of modified model H type automatic recirculating control valve, comprising:
One valve body, a valve gap being positioned at valve end, described valve body includes major loop and branch road, and described major loop and described branch road place are provided with bypass valve, in the nested major loop be arranged in valve body of described bypass valve;
Described bypass valve comprises a bypass valve seat cover, a little flap being positioned at bypass valve cover for seat one end, and the main valve clack that is positioned at the bypass valve cover for seat the other end, and described main valve clack end is also provided with elastic component; When valve body does not start, the passage of major loop blocks by elastic component and bypass valve self gravitation.
In a preferred embodiment of the present utility model, described main valve clack comprises a undertaking body, is provided with the projection coordinated with described undertaking body in described valve body.
In a preferred embodiment of the present utility model, the lower end of described bypass valve cover for seat is provided with sealing surface, forms sealing pair energy part with described little valve clack sealing surface, to be cut off by the current of major loop.
In a preferred embodiment of the present utility model, described bypass valve cover for seat is the nested adjusting nut being provided with adjust flux coefficient near elastic component place.
In a preferred embodiment of the present utility model, described elastic component is spring or stage clip.
In a preferred embodiment of the present utility model, the large end of described bypass valve cover for seat is provided with adjustment hole.
By technique scheme, the beneficial effects of the utility model are:
By original when main road is opened completely, bypass has little leakage current, and by designing sealing surface and little valve clack sealing surface forms sealing pair on bypass valve seat cover, when main road is opened completely, bypass is closed completely, reaches zero leakage, can energy saving.
The structure of bypassing reflux stream amount was regulated by the reflux change of the relative position overlapped of hole in flap shaft and bypass by originally needing, change medium inlet place on bypass valve cover for seat cylindrical into and open larger adjustment hole, when main road Lift changes, by regulating bypass capacity of reflux with the change of little flap relative position, simplify governing loop, save cost, increased the benefit.
The original size by changing throttle orifice being carried out adjust flux coefficient Cv value, regulating instead by adjusting nut; When bypass Cv value is less than normal, formerly need carry out reaming to all throttle orifices, now only need increase adjusting nut pad to regulate; When Cv value is bigger than normal, former need stifled weldering throttle orifice, need process thinning adjusting nut for existing.Enormously simplify adjustment process, decrease the amount of labour, improve efficiency.Facts have proved that this structure integrates Economy, practicability.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is structural drawing of the present utility model.
Fig. 2 is I portion of the present utility model partial enlarged drawing.
Fig. 3 is II portion of the present utility model partial enlarged drawing.
Fig. 4 is the utility model main road opening process position view.
Fig. 5 is the utility model main road full open position schematic diagram.
Embodiment
The technological means realized to make the utility model, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the utility model further.
Shown in Fig. 1-Fig. 5, a kind of modified model H type automatic recirculating control valve, comprise: a valve body 1, one valve gap 7 being positioned at valve body 1 end, described valve body 1 includes major loop and branch road, described major loop and described branch road place are provided with bypass valve, in the nested major loop be arranged in valve body of described bypass valve;
Described bypass valve comprises the little flap 2 that a bypass valve seat cover 3, is positioned at bypass valve cover for seat 3 one end, and the main valve clack 5 that is positioned at the bypass valve cover for seat the other end, and described main valve clack 5 end is also provided with elastic component 6; When valve body does not start, the passage of major loop blocks by elastic component and bypass valve self gravitation.
Further, main valve clack 5 comprises a undertaking body, is provided with the projection coordinated with described undertaking body in described valve body; The lower end of bypass valve cover for seat 3 is provided with sealing surface 310, forms sealing pair energy part with described little valve clack sealing surface, to be cut off by the current of major loop; Bypass valve cover for seat is the nested adjusting nut 4 being provided with adjust flux coefficient near elastic component place; Above-mentioned elastic component 5 is spring or stage clip; The upper end portion of bypass valve cover for seat is provided with adjustment hole 320.
When centrifugal pump starts, main line safety check is under the effect of spring and/or the deadweight of non-return flap, and be in closed condition, the bypass that little flap 2 stretches into bypass valve cover for seat 3 part is in fully open position, ensures enough backflows of pump.
When outlet of centrifugal pump flow increases, main line fluid overcomes spring force and/or non-return flap is conducted oneself with dignity and opens, and meanwhile, little flap assembly moves with main valve clack 5 under medium differential pressure effect, the bypass at bypass valve cover for seat 3 place is closed gradually, and bypass backflow is closed.
When centrifugal pump normally works, safety check is opened (flap rises to peak) by main line fluid completely, and little flap 3 is closed, and bypass is closed completely, cuts off bypass reflux cycle system completely.
When operating mode changes or be abnormal, along with the closedown being positioned at reflux valve downstream main line valve, reflux valve non-return flap is closed, and while preventing impact of water hammer, drives little flap component movement, the bypass at bypass valve cover for seat 2 place is opened, meets the minimum discharge of centrifugal pump.
When centrifugal pump is out of service, main line flow reduces, and safety check cuts out under spring force, prevents liquid countercurrent to the damage of pump.
Main feature: when main road is opened, bypass is closed completely, reaches zero leakage; In main road opening process, medium back flow amount can be progressively reduced, in main road closing process, progressively capacity of reflux can be increased; Can need to adjust bypass flow coefficient Cv value easily according to pipeline.
Bypass valve cover for seat lower end increases sealing surface, and the sealing pair formed with little valve clack sealing surface can when main road be opened completely, and bypass is closed completely, reaches zero leakage.
By-pass valve cover for seat increases adjustment hole, when main road Lift changes, by regulating bypass capacity of reflux with the change of little flap relative position.
Bypass increases adjusting nut, in user on-the-spot adjustable flow coefficient Cv value, when bypass Cv value is less than normal, only need increase adjusting nut pad; When bypass Cv value is bigger than normal, only thinning adjusting nut need be processed.
More than show and describe basic principle of the present utility model and major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (6)
1. a modified model H type automatic recirculating control valve, is characterized in that, comprising:
One valve body, a valve gap being positioned at valve end, described valve body includes major loop and branch road, and described major loop and described branch road place are provided with bypass valve, in the nested major loop be arranged in valve body of described bypass valve;
Described bypass valve comprises a bypass valve seat cover, a little flap being positioned at bypass valve cover for seat one end, and the main valve clack that is positioned at the bypass valve cover for seat the other end, and described main valve clack end is also provided with elastic component; When valve body does not start, the passage of major loop blocks by elastic component and bypass valve self gravitation.
2. a kind of modified model H type automatic recirculating control valve according to claim 1, it is characterized in that, described main valve clack comprises a undertaking body, is provided with the projection coordinated with described undertaking body in described valve body.
3. a kind of modified model H type automatic recirculating control valve according to claim 1, it is characterized in that, the lower end of described bypass valve cover for seat is provided with sealing surface, forms sealing pair energy part with described little valve clack sealing surface, to be cut off by the current of major loop.
4. a kind of modified model H type automatic recirculating control valve according to claim 1, it is characterized in that, described bypass valve cover for seat is the nested adjusting nut being provided with adjust flux coefficient near elastic component place.
5. a kind of modified model H type automatic recirculating control valve according to claim 1, it is characterized in that, described elastic component is spring or stage clip.
6. a kind of modified model H type automatic recirculating control valve according to claim 1, it is characterized in that, the large end of described bypass valve cover for seat is provided with adjustment hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520883814.4U CN205155236U (en) | 2015-11-06 | 2015-11-06 | Improved generation H type automatic recycling control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520883814.4U CN205155236U (en) | 2015-11-06 | 2015-11-06 | Improved generation H type automatic recycling control valve |
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| Publication Number | Publication Date |
|---|---|
| CN205155236U true CN205155236U (en) | 2016-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520883814.4U Active CN205155236U (en) | 2015-11-06 | 2015-11-06 | Improved generation H type automatic recycling control valve |
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| CN (1) | CN205155236U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107304845A (en) * | 2016-04-18 | 2017-10-31 | 北京航天石化技术装备工程有限公司 | A kind of automatic control return valve for bypassing No leakage |
| CN110332337A (en) * | 2019-06-27 | 2019-10-15 | 北京航天石化技术装备工程有限公司 | A kind of pilot-operated type bypass No leakage automatic control return valve |
-
2015
- 2015-11-06 CN CN201520883814.4U patent/CN205155236U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107304845A (en) * | 2016-04-18 | 2017-10-31 | 北京航天石化技术装备工程有限公司 | A kind of automatic control return valve for bypassing No leakage |
| CN110332337A (en) * | 2019-06-27 | 2019-10-15 | 北京航天石化技术装备工程有限公司 | A kind of pilot-operated type bypass No leakage automatic control return valve |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |