CN204985868U - Small -bore high -pressure axial -flow type check valve - Google Patents
Small -bore high -pressure axial -flow type check valve Download PDFInfo
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- CN204985868U CN204985868U CN201520742152.9U CN201520742152U CN204985868U CN 204985868 U CN204985868 U CN 204985868U CN 201520742152 U CN201520742152 U CN 201520742152U CN 204985868 U CN204985868 U CN 204985868U
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Abstract
The utility model discloses a small -bore high -pressure axial -flow type check valve, it includes: the main valve body (1), valve clack (2), spring (3) and deputy valve body (6), its characterized in that: valve clack (2) are for the direction and overflow a body structure, by valve clack main part (7) with be no less than 2 guide member (8) and form, the main valve body (1) inner chamber and guide member (8) contact, guide member (8) play guide and restriction valve clack (2) axial motion and prevent its effect that takes place radial beat, spring (3) are connected between valve clack main part (7) and deputy valve body (6). Valve clack main part (7) anterior segment is the round platform column structure, and the back end is the outside cylinder type structure of extending in anterior segment round platform structure bottom surface, guide member (8) are for connecting in the list structure in valve clack main part (7) the cylinder type structure outside. The utility model discloses valve structure is compact, the stroke is short, and the quick closedown of valve in the time of can realizing against the current can also be guaranteed that low pressure is sealed and low pressure is opened and have the fire prevention function.
Description
Technical field
The utility model relates to a kind of safety check, particularly relates to a kind of small-bore high-pressure shaft flow type back valve.
Background technique
Current CNG and other industry need a kind of high-performance; prevent from medium from flowing backwards to endanger; the axial flow type check valve of protective system equipment can meet high pressure working condition requirement, and common axial flow type check valve adopts flap and guide rod structure, and auxiliary valve body arranges guiding; and perforate overcurrent; structure limits by technique, and wasting space is large, and its sealability lacks effective ways and controls; easily there is uneven rotation in flap, causes product life cycle short.
Summary of the invention
The purpose of this utility model is to provide one can meet high pressure working condition requirement, compact structure, makes simple, the small-bore high-pressure shaft flow type back valve operated steadily.
The utility model is a kind of small-bore high-pressure shaft flow type back valve, and it comprises: main valve body 1, flap 2, spring 3 and auxiliary valve body 6, is characterized in that: flap 2 is guiding and overcurrent integrative-structure, by flap main body 7 be no less than 2 guide members 8 and form; Main valve body 1 inner chamber contacts with guide member 8, gap in flap main body 7 between equally distributed guide member 8 and form medium flow channels between main valve body 1 inner chamber, guide member 8 plays the effect of guiding and the axial motion of restriction flap 2 and prevents flap 2 radial deflection; One end of spring 3 is connected to flap main body 7 bottom surface, and the other end is connected on auxiliary valve body 6.
Described body cavity is columnar structured.
Described flap main body 7 leading portion is round table-like structure, and back segment is the outward extending cylindrical structure in leading portion frustum cone structure bottom surface.
Described guide member 8 is for being connected to the list structure outside flap main body 7 cylindrical structure.
Adopt between described main valve body 1 and auxiliary valve body 6 and be threaded, main valve body 1 spiro union portion is provided with internal thread, and auxiliary valve body 6 spiro union portion is provided with outside thread; The outer side surface of auxiliary valve body 6 spiro union portion near this spiro union portion bottom is provided with groove, and groove inner sleeve has O type circle 4, and auxiliary valve body 6 spiro union portion bottom cover has pad 5.
Pad 5 can use and be wound around Graphite pad, graphite composite gasket, metal jacketed gasket, metal reinforced asbestos washer, high-temperature resistant sealing pad.
Effect of the present utility model and advantage are:
Described flap 2 is made up of flap main body 7 and guide member 8, and flap main body 7 is truncated cone shape structure, and guide member 8 and main valve body 1 lumen contact, form guiding and overcurrent integrative-structure.Under medium effect, the axial motion of guide member 8 pairs of flaps 2 has leading role, and flap 2 can be made radial deflection can not to occur and affect sealing in switching process, and limits the axial motion amplitude of flap 2, makes flap 2 can quick-make.The sealing surface of flap 2, through special superpressed process, is applicable to high pressure working condition requirement.The overcurrent of the constitution realization of flap 2 medium and shunting, reasonably make use of the useful space of valve.
In described flap main body 7, cover has spring 3, and when pipeline mesohigh velocity of medium reduces, the elastic force that spring provides overcomes and acts on hydrodynamic pressure gradually little on flap 2, triggering flap throttle down.Due to the restriction of guide member 8, valve stroke is short, can realize the minimum and fast dynamic response of the adverse current speed of valve, realize quick closedown.The use of spring 3 simultaneously can also ensure low pressure seal and low-pressure opening.
Described main valve body inner chamber is columnar structured, its inner chamber contacts with guide member 8 equally distributed in flap main body 7, achieve the guide function in flap 2 within it chamber, the gap between its inner chamber and the equally distributed guide member 8 of flap, defines the flow channels of medium.
Described main valve body 1 and auxiliary valve body 6 seal position and are provided with O type circle 4 and pad 5, and pad 5 is be wound around the pad that Graphite pad, graphite composite gasket, metal jacketed gasket, metal reinforced asbestos washer, high-temperature resistant sealing pad etc. have fire-proof function.When contingencies such as breaking out of fires, O type circle 4 will be burned, and MEDIA FLOW is blocked when pad 5, realizes fire-proof function.
Accompanying drawing explanation
Fig. 1: small-bore high-pressure shaft flow type back valve structural drawing;
In figure: main valve body 1, flap 2, spring 3, O type circle 4, pad 5, auxiliary valve body 6;
Fig. 2: flap plan view;
Fig. 3: flap left view;
Fig. 4: the part A enlarged view in small-bore high-pressure shaft flow type back valve structural drawing.
Embodiment
As shown in Figure 1, a kind of small-bore high-pressure shaft flow type back valve, it comprises: main valve body 1, flap 2, spring 3, O type circle 4, winding Graphite pad 5 and auxiliary valve body 6.Wherein, main valve body 1 spiro union portion is provided with internal thread, and auxiliary valve body 6 spiro union portion is provided with outside thread; The outer side surface of auxiliary valve body 6 spiro union portion near this spiro union portion bottom is provided with groove, and groove inner sleeve has O type circle 4, and auxiliary valve body 6 spiro union portion bottom cover has winding Graphite pad 5, and be threaded connection between main valve body 1 and auxiliary valve body 6 and be integrated, body cavity is columnar structured.Corresponding cure process is made at main valve body 1 and the closely sealed position of flap 2, to make the difference of hardness maintaining about 5HRC between its surface hardness, while guarantee sealability, ensures that valve seat and flap 2 are not engaged.Flap 2 is guiding and overcurrent integrative-structure, is made up of flap main body 7 and 4 guide members 8; Main valve body 1 inner chamber contacts with guide member 8, guide member 8 plays the effect of flap 2 axial motion guide function and restriction flap 2 axial stroke and prevents flap 2 radial deflection, due to the restriction of guide member 8, valve stroke is short, minimum and the fast dynamic response of the adverse current speed of valve can be realized, realize quick closedown; Gap on flap main body 7 round column structure between equally distributed 4 guide members 8 and main valve body 1 cylindrical cavity define flow channels, achieve medium overcurrent.One end of spring 3 is connected to flap main body 7 bottom surface, and the other end is connected on auxiliary valve body 6, and under the effect of spring 3, the valve seat location of the sealing surface conflict main valve body 1 of flap 2, form sealing, the use of spring 3 can also ensure low pressure seal and low-pressure opening.
As shown in Figures 2 and 3, flap 2 is made up of flap main body 7 and 4 guide members 8, and wherein, flap main body 7 leading portion is round table-like structure, and back segment is the outward extending cylindrical structure in leading portion frustum cone structure bottom surface; Guide member 8 is for being connected to the list structure outside flap main body 7 cylindrical structure.This flap 2 takes up room little, and structure is simple, easy to make.
As shown in Figure 1, valve opening process: medium flows from left to right, medium thrust overcomes the elastic force of spring 3, push flap 2 open, open completely to straight flap 2, the flow channels that medium is formed with main valve body 1 cylindrical cavity by 4 guide members 8 equally distributed in flap main body 7, flows out the outlet of auxiliary valve body 6 right-hand member.In the process flap 2 be subject to guide member 8 restriction and can not with medium fluid generation radial motion.
As shown in Figure 1, the closing process of valve: reflux medium flows into from auxiliary valve body 6 right-hand member, the elastic force of medium thrust and spring 3 is formed makes a concerted effort, promote flap 2 under the leading role of guide member 8 vertically to left movement, the sealing surface of flap 2 and the sealing surface of seat of valve body 1 are tightly fitted, form sealing, medium cannot circulate, and realizes the one-way conduction function of safety check.Due to the restriction of guide member 8, the shorter valve that can realize of flap 2 axial displacement is closed rapidly.
If Fig. 4 is that the utility model fire resisting construction arranges schematic diagram.Main valve body 1 and auxiliary valve body 6 are for being threaded, auxiliary valve body 6 thread bottom is provided with groove, groove inner sleeve has O type circle, the cover bottom face that is spirally connected has pad 5, pad 5, for being wound around Graphite pad, also can be the pad that graphite composite gasket, metal jacketed gasket, metal reinforced asbestos washer, high-temperature resistant sealing pad etc. have fire-proof function.When contingencies such as breaking out of fires, O type circle 4 will be burned, and be blocked when MEDIA FLOW is through being wound around Graphite pad 5, medium can not flow out, thus realizes fire-proof function.
Claims (6)
1. a small-bore high-pressure shaft flow type back valve, it comprises: main valve body (1), flap (2), spring (3) and auxiliary valve body (6), it is characterized in that: flap (2) is guiding and overcurrent integrative-structure, by flap main body (7) be no less than 2 guide members (8) and form; Main valve body (1) inner chamber contacts with guide member (8), form medium flow channels between gap between the upper equally distributed guide member (8) of flap main body (7) and main valve body (1) inner chamber, guide member (8) plays the effect of guiding and restriction flap (2) axial motion and prevents flap (2) radial deflection; One end of spring (3) is connected to flap main body (7) bottom surface, and the other end is connected on auxiliary valve body (6).
2. the small-bore high-pressure shaft flow type back valve of one according to claim 1, is characterized in that: described main valve body (1) inner chamber is columnar structured.
3. the small-bore high-pressure shaft flow type back valve of one according to claim 1, is characterized in that: described flap main body (7) leading portion is round table-like structure, and back segment is the outward extending cylindrical structure in leading portion frustum cone structure bottom surface.
4. the small-bore high-pressure shaft flow type back valve of one according to claim 3, is characterized in that: described guide member (8) is for being connected to the list structure outside flap main body (7) cylindrical structure.
5. the small-bore high-pressure shaft flow type back valve of one according to claim 1, it is characterized in that: adopt between described main valve body (1) and auxiliary valve body (6) and be threaded, main valve body (1) spiro union portion is provided with internal thread, and auxiliary valve body (6) spiro union portion is provided with outside thread; The outer side surface of auxiliary valve body (6) spiro union portion near this spiro union portion bottom is provided with groove, and groove inner sleeve has O type circle (4), and auxiliary valve body (6) spiro union portion bottom cover has pad (5).
6. the small-bore high-pressure shaft flow type back valve of one according to claim 5, is characterized in that: pad (5) can use and be wound around Graphite pad, graphite composite gasket, metal jacketed gasket, metal reinforced asbestos washer, high-temperature resistant sealing pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520742152.9U CN204985868U (en) | 2015-09-23 | 2015-09-23 | Small -bore high -pressure axial -flow type check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520742152.9U CN204985868U (en) | 2015-09-23 | 2015-09-23 | Small -bore high -pressure axial -flow type check valve |
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| Publication Number | Publication Date |
|---|---|
| CN204985868U true CN204985868U (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520742152.9U Active CN204985868U (en) | 2015-09-23 | 2015-09-23 | Small -bore high -pressure axial -flow type check valve |
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| Country | Link |
|---|---|
| CN (1) | CN204985868U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112196698A (en) * | 2020-10-30 | 2021-01-08 | 西安航天动力研究所 | Non-full-circumference opening flow-limiting boosting type one-way valve |
-
2015
- 2015-09-23 CN CN201520742152.9U patent/CN204985868U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112196698A (en) * | 2020-10-30 | 2021-01-08 | 西安航天动力研究所 | Non-full-circumference opening flow-limiting boosting type one-way valve |
| CN112196698B (en) * | 2020-10-30 | 2021-07-20 | 西安航天动力研究所 | Non-full-circumference opening flow-limiting boosting type one-way valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No. 26, Yuchuan Road, high tech Industrial Park, Zigong, Sichuan, 643000 Patentee after: Sichuan Dewei Valve Co.,Ltd. Address before: No. 26, Yuchuan Road, high tech Industrial Park, Zigong, Sichuan, 643000 Patentee before: SICHUAN VOLANT VALVE Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |