CN203363276U - Automatic return valve - Google Patents
Automatic return valve Download PDFInfo
- Publication number
- CN203363276U CN203363276U CN 201320414126 CN201320414126U CN203363276U CN 203363276 U CN203363276 U CN 203363276U CN 201320414126 CN201320414126 CN 201320414126 CN 201320414126 U CN201320414126 U CN 201320414126U CN 203363276 U CN203363276 U CN 203363276U
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- China
- Prior art keywords
- valve
- bypass
- valve body
- pass
- clack
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- Expired - Lifetime
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Abstract
The utility model discloses an automatic return valve which comprises a valve body, a main valve rod, a main valve clack, a by-pass valve rod, a by-pass valve clack, a throttling pressure reduction mechanism and a by-pass valve body. The main valve rod, the main valve clack, the by-pass valve rod and the by-pass valve clack are arranged in the valve body; the valve body is provided with a valve inlet, a valve outlet and a backflow opening, the valve is connected with the by-pass valve body on the backflow opening, and a by-pass channel is arranged in the by-pass valve body; the throttling pressure reduction mechanism is arranged in the by-pass channel, and a threaded channel is arranged in the throttling pressure reduction mechanism; the main valve rod is connected with the main valve clack, the main valve clack is connected with the by-pass valve rod, and the by-pass valve rod is connected with the by-pass valve clack; the by-pass valve clack is arranged at one end of the by-pass channel, and flow of the by-pass channel is controlled through on-off adjustment of the by-pass channel via moving and adjustment of the throttling area. According to the automatic return valve, the throttling pressure reduction mechanism is arranged in the threaded channel, so backflow stability can be improved.
Description
Technical field
The utility model belongs to the mechanical device technical field, relates to a kind of reflux valve, relates in particular to a kind of automatic reflux valve.
Background technique
Reflux valve be a kind of protective system because of the destroyed valve of overpressure, once the pressure medium in system pipeline or device surpasses setting value, can automatic release pressure, thereby reach the purpose of safety protection.
Existing automatic reflux valve mainly comprises main valve and by-pass valve, and main valve comprises valve body, main valve stem, main valve clack, and by-pass valve comprises bypass valve body, bypass flap, throttle mechanism; Existing throttle mechanism generally adopts the hollow plate structure, and effect of easing stress is not good enough, the backflow less stable.
In view of this, nowadays in the urgent need to designing a kind of new automatic reflux valve, to overcome the above-mentioned defect of existing reflux valve.
The model utility content
Technical problem to be solved in the utility model is: a kind of automatic reflux valve is provided, can improves the stability of backflow.
For solving the problems of the technologies described above, the utility model adopts following technological scheme:
A kind of automatic reflux valve, described reflux valve comprises: valve body, main valve stem, main valve clack, bypass valve rod, bypass flap, expenditure and pressure mechanism, bypass valve body;
Described main valve stem, main valve clack, bypass valve rod, bypass flap are arranged in valve body;
Described valve body is provided with valve inlet, valve outlet port, refluxing opening, and described valve body connects described bypass valve body at refluxing opening, in the bypass valve body, bypass channel is arranged; Described expenditure and pressure mechanism is arranged in bypass channel, in described expenditure and pressure mechanism, is provided with screw channel;
Described main valve stem connects main valve clack, and main valve clack connects the bypass valve rod, and the bypass valve rod connects the bypass flap; Described bypass flap is arranged at an end of described bypass channel, regulates break-make and the orifice size of bypass channel by movement, controls the flow of bypass channel.
As a kind of preferred version of the present utility model, described valve body comprises upper valve body, lower valve body, and upper valve body is fixedly connected with lower valve body.
As a kind of preferred version of the present utility model, fixedly gusset is set in described upper valve body, an end of described main valve stem is fixed in upper valve body by fixing gusset.
The beneficial effects of the utility model are: the automatic reflux valve the utility model proposes, by will in expenditure and pressure mechanism, screw channel being set, can improve the stability of backflow.
The accompanying drawing explanation
The structural representation that Fig. 1 is the utility model automatic reflux valve.
Embodiment
Describe preferred embodiment of the present utility model in detail below in conjunction with accompanying drawing.
Embodiment one
Refer to Fig. 1, the utility model has disclosed a kind of automatic reflux valve, and described reflux valve comprises: lower valve body 1, upper valve body 2, main valve stem 5, main valve clack 6, bypass valve rod 7, bypass flap 8, expenditure and pressure mechanism 9, bypass valve body 3; The be composed of a fixed connection valve body of reflux valve of lower valve body 1, upper valve body 2.
Described main valve stem 5, main valve clack 6, bypass valve rod 7, bypass flap 8 are arranged in valve body; Described valve body is provided with valve inlet, valve outlet port, refluxing opening.Described lower valve body 1 connects described bypass valve body 3 at refluxing opening, in bypass valve body 3, bypass channel is arranged; Described expenditure and pressure mechanism 9 is arranged in bypass channel 3, in described expenditure and pressure mechanism 9, is provided with screw channel.
Described main valve stem 5 connects main valve clack 6, and main valve clack 6 connects bypass valve rod 7, and bypass valve rod 7 connects bypass flap 8; Described bypass flap 8 is arranged at an end of described bypass channel, and break-make and the orifice size of the position regulation bypass channel by mobile bypass flap 8 are controlled the flow of bypass channel.
In addition, the interior fixedly gusset 4 that arranges of described upper valve body 2, an end of described main valve stem 5 is fixed in upper valve body 2 by fixing gusset 4.
Action principle of the present utility model is: according to the main road flow difference of sensing, the main valve clack non-return of automatic reflux valve cone will be automatically moved on some positions.Main valve clack drives the bypass valve rod simultaneously, the main valve clack action is passed to the position of bypass flap, changes the orifice size of bypass, thereby controls by the flow of bypass.When main valve clack is back to the valve seat closed condition, all flows reflux by bypass.When main valve clack rises to apical position, bypass is closed fully, the flux and flow direction process system of all pumps.
The utility model automatic reflux valve can be used as pump protector, and the part cavitation erosion that can be automatically may occur in the pump housing when the underrun centrifugal pump damages and unstable the protection.Once flow is lower than preset flow, bypass opens to guarantee the required minimum discharge of pump fully.Even the main road flow is zero, minimum discharge can be carried out automatic cycle by bypass.Pressure reduces by the integrated multilevel expenditure and pressure device in bypass.
In sum, the automatic reflux valve the utility model proposes, by will in expenditure and pressure mechanism, screw channel being set, can improve the stability of backflow.
The utility model is simple in structure, reliable stable, only has a small amount of moving element; The pressure export place that is arranged on pump that can be horizontal or vertical easily is installed.Bypass flow is large, maximum to 60% of main flow, KV value capable of regulating; Other liquid mediums such as applicable water, oil, methyl alcohol, operating temperature is from-196 ℃～300 ℃.
Here description of the present utility model and application is illustrative, not wants by scope restriction of the present utility model in the above-described embodiments.Here disclosed embodiment's distortion and change is possible, and for those those of ordinary skill in the art, the various parts of embodiment's replacement and equivalence are known.Those skilled in the art are noted that in the situation that do not break away from spirit of the present utility model or substantive characteristics, and the utility model can be with other form, structure, layout, ratio, and realizes with other assembly, material and parts.In the situation that do not break away from the utility model scope and spirit, can carry out other distortion and change to disclosed embodiment here.
Claims (3)
1. an automatic reflux valve, is characterized in that, described reflux valve comprises: valve body, main valve stem, main valve clack, bypass valve rod, bypass flap, expenditure and pressure mechanism, bypass valve body;
Described main valve stem, main valve clack, bypass valve rod, bypass flap are arranged in valve body;
Described valve body is provided with valve inlet, valve outlet port, refluxing opening, and described valve body connects described bypass valve body at refluxing opening, in the bypass valve body, bypass channel is arranged; Described expenditure and pressure mechanism is arranged in bypass channel, in described expenditure and pressure mechanism, is provided with screw channel;
Described main valve stem connects main valve clack, and main valve clack connects the bypass valve rod, and the bypass valve rod connects the bypass flap; Described bypass flap is arranged at an end of described bypass channel, regulates break-make and the orifice size of bypass channel by movement, controls the flow of bypass channel.
2. automatic reflux valve according to claim 1 is characterized in that:
Described valve body comprises upper valve body, lower valve body, and upper valve body is fixedly connected with lower valve body.
3. automatic reflux valve according to claim 2 is characterized in that:
Fixedly gusset is set in described upper valve body, and an end of described main valve stem is fixed in upper valve body by fixing gusset.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320414126 CN203363276U (en) | 2013-07-12 | 2013-07-12 | Automatic return valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320414126 CN203363276U (en) | 2013-07-12 | 2013-07-12 | Automatic return valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203363276U true CN203363276U (en) | 2013-12-25 |
Family
ID=49811040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320414126 Expired - Lifetime CN203363276U (en) | 2013-07-12 | 2013-07-12 | Automatic return valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203363276U (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 |
-
2013
- 2013-07-12 CN CN 201320414126 patent/CN203363276U/en not_active Expired - Lifetime
Cited By (3)
| 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 |
| CN110332337B (en) * | 2019-06-27 | 2024-05-14 | 北京航天石化技术装备工程有限公司 | Pilot-operated bypass leakage-free self-control reflux valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131225 |