CN105927764A - Non-return valve - Google Patents
Non-return valve Download PDFInfo
- Publication number
- CN105927764A CN105927764A CN201610410866.9A CN201610410866A CN105927764A CN 105927764 A CN105927764 A CN 105927764A CN 201610410866 A CN201610410866 A CN 201610410866A CN 105927764 A CN105927764 A CN 105927764A
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- valve body
- valve
- space
- check
- valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
Abstract
The invention discloses a non-return valve. The non-return valve comprises a valve body and an upper cover for sealing the open end of the valve body, wherein the two sides of the valve body are separately provided with an air inlet channel and an air outlet channel; the air inlet channel communicates with the open end of the valve body through a first vertical channel; a plunger patch assembly is mounted in the first vertical channel; one end of the plunger patch assembly extends into the open end of the valve body and then is connected with a valve head; a valve head sealing ring is mounted below the valve head; a second non-return system is formed between the valve head and the valve head sealing ring; a spring is mounted between the lower end surface of the valve head and the plunger patch assembly; a ring-shaped sealing gasket and a pressure cover are sequentially mounted above the valve head; and a first non-return system is formed between the sealing gasket and the valve head. Under absolute small-value return pressure, the first non-return system is activated, so that all reflux is cut off. When reflux pressure is increased, the second non-return system is closed and all reflux is kept to be cut off on the position by virtue of the sealing gasket, so that safety during reflux is guaranteed. The non-return valve is suitable for the non-return valve of fuel gas or coal gas.
Description
Technical field
The present invention relates to combustion gas or coal gas controls a kind of control valve in research field, particularly a kind of check-valves.
Background technology
Check-valves refers to rely on medium itself to flow and automatic open and close flap, is used for the valve preventing medium from flowing backwards, also known as non-return valve, check valve, reflux valve and counterbalance valve.Check-valves belongs to a kind of automatic valve, and its Main Function is to prevent medium from flowing backwards, prevent pump and drive motor reversion, and the releasing of vessel media.But, existing check-valves is provided with lever or chain link, is susceptible to mechanical breakdown.It addition, inconvenience safeguarded by existing check-valves, detect after needing to remove whole check-valves from pipeline or circuit and/or safeguard.Further, operationally easily there is condensed water at valve inner in existing check-valves, but condensed water is not easy valve inner discharges.
Summary of the invention
The purpose of the present invention, is to provide a kind of check-valves.
nullThe present invention solves the solution of its technical problem: check-valves，The valve body uncovered including upper end and the upper cover that the opening end of valve body is closed，The opening end of valve body is wide at the top and narrow at the bottom bucket-shaped，The both sides of described valve body are respectively arranged inlet channel and outlet passageway，Described inlet channel is connected with the opening end of valve body by the first Vertical Channel，Stick harness patch assembly is installed in described first Vertical Channel，One end of described stick harness patch assembly is connected with the valve head within the opening end being positioned at valve body after stretching into the opening end of valve body，The lower section of described valve head is provided with valve head sealing ring，The second non-return system is formed between valve head and valve head sealing ring，Between lower surface and the stick harness patch assembly of valve head, spring is installed，Valve head be sequentially arranged above with ring-type gasket seal and gland，The first non-return system is formed between gasket seal and valve head，The opening end of valve body is separated into the first space being positioned at below gasket seal by described gasket seal and gland、Second space between gasket seal and gland and the 3rd space between gland and upper cover，Described first space、Second space and the 3rd space directly or indirectly connect，Described second outlet passageway is connected with the 3rd space by the second Vertical Channel.Being under absolute little value back pressure, the first non-return system is activated, thus cuts off all backflows.When return pressure increases, the second non-return system is closed and keeps its position to cut off all backflows by packing, and then ensures the safety when backflow.
As the further improvement of technique scheme, arranging steel wire between described gasket seal and gland, described steel wire is positioned at second space.Steel wire is preferably copper bound steel wire, and when check-valves meets with stream, copper bound steel wire will stop gasket seal to be pasted on gland.
Further improvement as technique scheme, described gasket seal includes the first pad of close valve head and is positioned at the second pad above the first pad, after the outer stacking from the bottom up of described first pad, the second pad and gland, the outer of the first pad and the second pad is pressed in the caulking groove of valve inner by gland by gland nut.When check-valves is in the position completely closed, the first pad and the second pad all can be attached on the outer round surface of valve head, thus avoid rupturing of its.
As the further improvement of technique scheme, being disposed with valve seal packing ring between described upper cover and valve body, upper cover is arranged on valve body by bolt.Detecting for convenience, when upper cover is removed, in check-valves, all of parts are knockdown pieces.This also makes to need not remove check-valves from pipeline or circuit detect.
Further improvement as technique scheme, air inlet pressure tap it is disposed with in the lower wall of described inlet channel, air inlet pressure measurement mouth, air inlet pressure tap screw and air inlet pressure measurement sealing gasket are installed on described air inlet pressure tap, be disposed with, in the lower wall of described outlet passageway, pressure tap of giving vent to anger, described in give vent to anger and pressure measurement mouth of giving vent to anger, give vent to anger pressure tap screw and pressure measurement sealing gasket of giving vent to anger be installed on pressure tap.
As the further improvement of technique scheme, described inlet channel is vertical with the first Vertical Channel, and described outlet passageway is vertical with the second Vertical Channel, i.e. inlet channel and outlet passageway is all arranged horizontally.Preferably, the centrage of inlet channel and the centrage of outlet passageway overlap.
Further improvement as technique scheme, the lower end of described stick harness patch assembly is fixed in the lower wall of inlet channel by the first nut, the outside of described first nut is disposed with the first nut, it is disposed with nut seal pad between described first nut and valve body, condensed water can be discharged by simply removing the first nut and the first nut.
As the further improvement of technique scheme, described first space and second space are connected by the gap between gasket seal and valve body cylindrical, and described second space and the 3rd space are connected by the through hole in the middle part of gland.
The invention has the beneficial effects as follows: the present invention, by arranging two non-return systems, is under absolute little value back pressure, and the first non-return system is activated, thus cuts off all backflows.When return pressure increases, the second non-return system is closed and keeps its position to cut off all backflows by packing, and then ensures the safety when backflow.There is no lever or chain link in the check valve, it is possible to avoid the generation of mechanical breakdown.Therefore, check-valves simply needs to be installed in a horizontal level and guarantees to run normally.It addition, by simply removing the first nut and condensed water can be discharged by the first nut.The present invention is applicable to the check-valves of combustion gas or coal gas.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, in describing embodiment below, the required accompanying drawing used is briefly described.Obviously, described accompanying drawing is a part of embodiment of the present invention rather than whole embodiment, and those skilled in the art is not on the premise of paying creative work, it is also possible to obtain other designs and accompanying drawing according to these accompanying drawings.
Fig. 1 is the sectional view of the present invention.
Detailed description of the invention
Below with reference to embodiment and accompanying drawing, the technique effect of design, concrete structure and the generation of the present invention is clearly and completely described, to be completely understood by the purpose of the present invention, feature and effect.Obviously; described embodiment is a part of embodiment of the present invention rather than whole embodiment, based on embodiments of the invention; other embodiments that those skilled in the art is obtained on the premise of not paying creative work, belong to the scope of protection of the invention.It addition, all connection/annexations being previously mentioned in literary composition, the most singly refer to that component directly connects, and refer to couple auxiliary according to being embodied as situation by adding or reducing, form more excellent draw bail.
nullWith reference to Fig. 1，Check-valves，The valve body 1 uncovered including upper end and the upper cover 10 that the opening end of valve body 1 is closed，The opening end of valve body 1 is wide at the top and narrow at the bottom bucket-shaped，The both sides of described valve body 1 are respectively arranged inlet channel 2 and outlet passageway 24，Described inlet channel 2 is connected with the opening end of valve body 1 by the first Vertical Channel 3，In described first Vertical Channel 3, stick harness patch assembly 4 is installed，One end of described stick harness patch assembly 4 is connected with the valve head 5 within the opening end being positioned at valve body 1 after stretching into the opening end of valve body 1，The lower section of described valve head 5 is provided with valve head sealing ring 18，The second non-return system is formed between valve head 5 and valve head sealing ring 18，Between lower surface and the stick harness patch assembly 4 of valve head 5, spring 25 is installed，Valve head 5 be sequentially arranged above with ring-type gasket seal and gland 9，The first non-return system is formed between gasket seal and valve head 5，The opening end of valve body 1 is separated into the first space being positioned at below gasket seal by described gasket seal and gland 9、Second space between gasket seal and gland 9 and the 3rd space between gland 9 and upper cover 10，Described first space、Second space and the 3rd space directly or indirectly connect，Described second outlet passageway 24 is connected with the 3rd space by the second Vertical Channel 19.Being under absolute little value back pressure, the first non-return system is activated, thus cuts off all backflows.When return pressure increases, the second non-return system is closed and keeps its position to cut off all backflows by packing, and then ensures the safety when backflow.
When combustion gas enters check-valves from inlet channel 2, combustion gas can be lifted being provided with the gasket seal at the valve head 5 of spring 25, first space connects with second space, it is allowed to combustion gas passes sequentially through the first Vertical Channel, the first space, second space, the 3rd space, the second Vertical Channel and outlet passageway when minimum degree of admission and passes through check-valves.On position before the slightest back pressure will make gasket seal return to, thus stop any backflow.If back pressure increases again, valve head 5 can effectively be closed, and plays the effect of secondary seal, and in this case, check-valves can bear the high back pressure of 0.5MPa.When check-valves is in the position completely closed, two the first pads and the second pad all can be attached on the outer round surface of valve head 5, thus avoid rupturing of its.
Being further used as preferred embodiment, arrange steel wire 8 between described gasket seal and gland 9, described steel wire 8 is positioned at second space.Steel wire 8 is preferably copper bound steel wire, and when check-valves meets with stream, copper bound steel wire will stop gasket seal to be pasted on gland 9.
It is further used as preferred embodiment, described gasket seal includes the first pad 6 of close valve head 5 and is positioned at the second pad above the first pad 6, after the outer stacking from the bottom up of described first pad the 6, second pad 7 and gland 9, the outer of the first pad 6 and the second pad 7 is pressed in the caulking groove within valve body 1 by gland 9 by gland nut 26.When check-valves is in the position completely closed, the first pad 6 and the second pad 7 all can be attached on the outer round surface of valve head 5, thus avoid rupturing of its.
Being further used as preferred embodiment, be disposed with valve seal packing ring 11 between described upper cover 10 and valve body 1, upper cover 10 is arranged on valve body 1 by bolt.Detecting for convenience, when upper cover 10 is removed, in check-valves, all of parts are knockdown pieces.This also makes to need not remove check-valves from pipeline or circuit detect.
It is further used as preferred embodiment, it is disposed with air inlet pressure tap 12 in the lower wall of described inlet channel 2, air inlet pressure measurement mouth 13, air inlet pressure tap screw 14 and air inlet pressure measurement sealing gasket 15 are installed on described air inlet pressure tap 12, be disposed with, in the lower wall of described outlet passageway 24, pressure tap 20 of giving vent to anger, described in give vent to anger and pressure measurement mouth 21 of giving vent to anger, give vent to anger pressure tap screw 22 and pressure measurement sealing gasket 23 of giving vent to anger be installed on pressure tap 20.
Being further used as preferred embodiment, described inlet channel 2 is vertical with the first Vertical Channel 3, and described outlet passageway 24 is vertical with the second Vertical Channel 19, i.e. inlet channel 2 and outlet passageway 24 is all arranged horizontally.Preferably, the centrage of inlet channel 2 and the centrage of outlet passageway 24 overlap.Valve body 1 uses horizontal pipe to connect, and therefore when being installed in the duct by check-valves, check-valves will be on horizontal plane.It is essential that when installing check-valves, it should the horizontal level within keeping ± 3 °.On this position, the first nut and first nut of bottom will vertically downward, contribute to the discharge of condensed water.Preferably installing a shutoff valve in the import of admission line and the outlet of outlet pipe, the position of shutoff valve is as far as possible near the valve body 1 of check-valves, in order to detects and keeps in repair check-valves.
It is further used as preferred embodiment, the lower end of described stick harness patch assembly 4 is fixed in the lower wall of inlet channel 2 by the first nut 16, the outside of described first nut 16 is disposed with the first nut 17, it is disposed with nut seal pad 27 between described first nut 17 and valve body 1, condensed water can be discharged by simply removing the first nut and the first nut 16.
Being further used as preferred embodiment, described first space and second space are connected by the gap between gasket seal and valve body 1 cylindrical, and described second space and the 3rd space are connected by the through hole in the middle part of gland 9.
It is above the better embodiment of the present invention is illustrated, but the invention is not limited to described embodiment, those of ordinary skill in the art also can make all equivalent modifications or replacement on the premise of spirit of the present invention, and modification or the replacement of these equivalents are all contained in the application claim limited range.
Claims (8)
- null1. check-valves，It is characterized in that: include the uncovered valve body in upper end and the upper cover closed by the opening end of valve body，The both sides of described valve body are respectively arranged inlet channel and outlet passageway，Described inlet channel is connected with the opening end of valve body by the first Vertical Channel，Stick harness patch assembly is installed in described first Vertical Channel，One end of described stick harness patch assembly is connected with the valve head within the opening end being positioned at valve body after stretching into the opening end of valve body，The lower section of described valve head is provided with valve head sealing ring，Between lower surface and the stick harness patch assembly of valve head, spring is installed，Valve head be sequentially arranged above with ring-type gasket seal and gland，The opening end of valve body is separated into the first space being positioned at below gasket seal by described gasket seal and gland、Second space between gasket seal and gland and the 3rd space between gland and upper cover，Described first space、Second space and the 3rd space directly or indirectly connect，Described second outlet passageway is connected with the 3rd space by the second Vertical Channel.
- Check-valves the most according to claim 1, it is characterised in that: arranging steel wire between described gasket seal and gland, described steel wire is positioned at second space.
- Check-valves the most according to claim 2, it is characterized in that: described gasket seal includes the first pad of close valve head and is positioned at the second pad above the first pad, after the outer stacking from the bottom up of described first pad, the second pad and gland, the outer of the first pad and the second pad is pressed in the caulking groove of valve inner by gland by gland nut.
- 4. according to the check-valves described in claim 1 or 2 or 3, it is characterised in that: being disposed with valve seal packing ring between described upper cover and valve body, upper cover is arranged on valve body by bolt.
- Check-valves the most according to claim 1, it is characterized in that: in the lower wall of described inlet channel, be disposed with air inlet pressure tap, air inlet pressure measurement mouth, air inlet pressure tap screw and air inlet pressure measurement sealing gasket are installed on described air inlet pressure tap, be disposed with, in the lower wall of described outlet passageway, pressure tap of giving vent to anger, described in give vent to anger and pressure measurement mouth of giving vent to anger, give vent to anger pressure tap screw and pressure measurement sealing gasket of giving vent to anger be installed on pressure tap.
- 6. according to the check-valves described in claim 1 or 2 or 3, it is characterised in that: described inlet channel is vertical with the first Vertical Channel, and described outlet passageway is vertical with the second Vertical Channel.
- 7. according to the check-valves described in claim 1 or 2 or 3, it is characterized in that: the lower end of described stick harness patch assembly is fixed in the lower wall of inlet channel by the first nut, the outside of described first nut is disposed with the first nut, is disposed with nut seal pad between described first nut and valve body.
- Check-valves the most according to claim 1 and 2, it is characterised in that: described first space and second space are connected by the gap between gasket seal and valve body cylindrical, and described second space and the 3rd space are connected by the through hole in the middle part of gland.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610410866.9A CN105927764B (en) | 2016-06-12 | 2016-06-12 | Check-valves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610410866.9A CN105927764B (en) | 2016-06-12 | 2016-06-12 | Check-valves |
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| Publication Number | Publication Date |
|---|---|
| CN105927764A true CN105927764A (en) | 2016-09-07 |
| CN105927764B CN105927764B (en) | 2018-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610410866.9A Active CN105927764B (en) | 2016-06-12 | 2016-06-12 | Check-valves |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6386222B1 (en) * | 1997-10-02 | 2002-05-14 | Stant Manufacturing Inc. | Electronic fill limit control |
| CN201059380Y (en) * | 2007-06-14 | 2008-05-14 | 广东长青（集团）股份有限公司 | Gas relief valve |
| CN203297693U (en) * | 2013-05-31 | 2013-11-20 | 袁东日 | One-way valve device |
| CN204756059U (en) * | 2015-07-28 | 2015-11-11 | 宁波万安股份有限公司 | Non return formula gas pressure regulator |
| CN205806577U (en) * | 2016-06-12 | 2016-12-14 | 广州市精鼎电器科技有限公司 | Check-valves |
-
2016
- 2016-06-12 CN CN201610410866.9A patent/CN105927764B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6386222B1 (en) * | 1997-10-02 | 2002-05-14 | Stant Manufacturing Inc. | Electronic fill limit control |
| CN201059380Y (en) * | 2007-06-14 | 2008-05-14 | 广东长青（集团）股份有限公司 | Gas relief valve |
| CN203297693U (en) * | 2013-05-31 | 2013-11-20 | 袁东日 | One-way valve device |
| CN204756059U (en) * | 2015-07-28 | 2015-11-11 | 宁波万安股份有限公司 | Non return formula gas pressure regulator |
| CN205806577U (en) * | 2016-06-12 | 2016-12-14 | 广州市精鼎电器科技有限公司 | Check-valves |
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| Publication number | Publication date |
|---|---|
| CN105927764B (en) | 2018-02-13 |
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