CN203743530U - Flow-limiting check valve - Google Patents
Flow-limiting check valve Download PDFInfo
- Publication number
- CN203743530U CN203743530U CN201320862803.9U CN201320862803U CN203743530U CN 203743530 U CN203743530 U CN 203743530U CN 201320862803 U CN201320862803 U CN 201320862803U CN 203743530 U CN203743530 U CN 203743530U
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- CN
- China
- Prior art keywords
- valve
- flow
- valve body
- flap
- seat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Fluid-Driven Valves (AREA)
- Check Valves (AREA)
Abstract
The utility model discloses a flow-limiting check valve. The flow-limiting check valve is mainly composed of a valve body, a valve seat, a valve clack, a filter, a valve cover, a flow-limiting guide valve, a spring, a spring base, a needle valve, a membrane and a guide rod. An inlet cavity of the valve body is connected with a valve cover cavity through a guide pipe, the guide pipe is provided with the flow-limiting guide valve, a one-way valve is arranged behind the flow-limiting guide valve, the filter is arranged before the flow-limiting guide valve, and a ball valve is arranged before the filter. The flow-limiting guide valve is used for controlling the pump head, namely the differential pressure of the inlet and the outlet of a water pump, and can control the differential pressure of the inlet and the outlet of the water pump. The flow-limiting guide valve is provided with a connecting port connected with the inlet of the water pump. The flow-limiting check valve has the advantages that the flow-limiting check valve is installed in the water pump pressure outlet when a plurality of pumps are used in parallel, limits the working flow of the water pump, prevents pump stopping and back flowing, and is compact in structure, light, wide in adjusting range, high in flexibility, stable and reliable in working and the like.
Description
Technical field
The utility model relates to valve technology field, specifically a kind of flow restricted check valve that is installed on exit of pump while using for many parallels connection of pumps.
Background technique
Flow restricted check valve is a kind of Self-operated valve.Adopt the mode of change number of units to carry out the system of Flow-rate adjustment for many parallel connections of water pump, install this kind of valve at exit of pump, to operating pump, can stablize lift, limited flow, prevents the generation of overloading, to pump branch road out of service, there is non-return effect.But the deficiency that the flow restricted check valve using at present exists that regulation range is little, regulating error is large, sensitivity is low and critical component working life is short etc.
Model utility content
The purpose of this utility model is to provide a kind of compact structure, lightweight, regulation range is large, the highly sensitive and reliable flow restricted check valve of working stability.
The utility model solves the technological scheme that its technical problem adopts: flow restricted check valve is mainly by valve body, valve seat, flap, filter, valve gap, current limliting pilot valve, spring, spring seat, needle value, barrier film and guide rod composition, valve body and valve gap are bolted connection, centre is provided with barrier film valve body and valve gap is separated, valve gap is placed in valve body top, between valve gap and barrier film, form valve cover cavity, in valve cover cavity, be provided with spring, spring top coordinates with valve gap top, also be provided with relief opening and plug preparation at valve gap top, spring bottom contacts with barrier film by spring seat, described flap is located in valve body, spring seat, barrier film and flap pass through guide rod, positioning ring and nut are fixed together, guide rod vertically arranges, and run through barrier film and two ends extend to respectively in valve cover cavity and valve body, the lower end that guide rod is placed in valve body is provided with positioning ring, above positioning ring, limit flap, flap top contacts with barrier film, guide rod stretches into valve cover cavity linking springs seat and is fixed by nut, coordinate flap on valve body, to be provided with valve seat, valve seat and flap contact segment are provided with sealing gasket, be provided with pilot hole at valve seat center, pilot hole is for positioning and guiding bar, guide rod can move up and down in pilot hole, valve seat and valve body are made as one, and valve body is separated into snout cavity and outlet plenum two-part by valve seat, flap is positioned at outlet plenum, also be provided with sewage draining exit and the plug preparation of removing contamination in valve body bottom.
Between the snout cavity of described valve body and valve cover cavity, be connected by conduit, and on this conduit, be provided with current limliting pilot valve, after current limliting pilot valve, be provided with one-way valve, before current limliting pilot valve, be also provided with filter, before filter, be provided with ball valve, described current limliting pilot valve is used for controlling pump head, i.e. water pump inlet outlet pressure differential, there is the effect to the control of water pump inlet outlet pressure differential, on current limliting pilot valve, be provided with connection mouth and be connected with pump entrance; Between the outlet plenum of described valve body and valve cover cavity, be also provided with conduit and be connected, and be provided with needle value on this conduit.
Working principle of the present utility model is as follows, current are entered by the snout cavity of valve body through exit of pump, after flap throttling restriction, flow to outlet plenum, play metering function, in the time that pump head is greater than the control pressure reduction of current limliting pilot valve, current limliting pilot valve is in closed condition, flap can reach maximum opening under the water pressure pushing of snout cavity, in the time that needs change flow and reduce water pump operation number of units, the pump capacity moving will increase, lift reduces, in the time that lift is less than the control pressure reduction of current limliting pilot valve, current limliting pilot valve is opened, part current flow into valve cover cavity after current limliting pilot valve and one-way valve, cause the water pressure in valve cover cavity to increase, barrier film drives flap to move down, the overflow section having reduced between flap and valve seat amasss, its water flow reduces thereupon, pump head increases thereupon, in the time reaching state of equilibrium, pump head is the control pressure reduction of current limliting pilot valve, in the time switching off the pump, the outlet plenum pressure of valve body is greater than snout cavity pressures, and current flow into valve cover cavity through needle value, and valve cover cavity pressure increases, and barrier film drives flap to close, and plays the effect of buffer valve.
The beneficial effects of the utility model are, the utility model is installed on water pump while use for many parallels connection of pumps and extrudes mouth, play restriction pump working flow, prevent termination of pumping backflow effect, there is compact structure, weight compared with the advantage such as light, regulation range is large, highly sensitive and working stability is reliable.
Brief description of the drawings
Accompanying drawing 1 is structural representation of the present utility model.
In figure, 1, valve body, 2, snout cavity, 3, valve seat, 4, conduit, 5, ball valve, 6, flap, 7, filter, 8, valve gap, 9, current limliting pilot valve, 10, connection mouth, 11, one-way valve, 12, spring, 13, relief opening, 14, plug, 15, nut, 16, spring seat, 17, needle value, 18, conduit, 19, valve cover cavity, 20, bolt, 21, barrier film, 22, guide rod, 23, sealing gasket, 24, outlet plenum, 25, positioning ring, 26, pilot hole, 27, sewage draining exit, 28, the plug of removing contamination.
Embodiment
With regard to accompanying drawing 1, flow restricted check valve of the present utility model is described in detail below below.
As shown in Figure 1, flow restricted check valve of the present utility model is mainly by valve body 1, valve seat 3, flap 6, filter 7, valve gap 8, current limliting pilot valve 9, spring 12, spring seat 16, needle value 17, barrier film 21 and guide rod 22 form, valve body 1 is fastenedly connected by bolt 20 with valve gap 8, centre is provided with barrier film 21 valve body 1 and valve gap 8 is separated, valve gap 8 is placed in valve body 1 top, between valve gap 8 and barrier film 21, form valve cover cavity 19, in valve cover cavity 19, be provided with spring 12, spring 12 tops coordinate with valve gap 8 tops, also be provided with relief opening 13 prepares with plug 14 at valve gap 8 tops, spring 12 bottoms contact with barrier film 21 by spring seat 16, described flap 6 is located in valve body 1, spring seat 16, barrier film 21 and flap 6 are by guide rod 22, positioning ring 25 and nut 15 are fixed together, guide rod 22 vertically arranges, and run through barrier film 21 and two ends extend to respectively in valve cover cavity 19 and valve body 1, the lower end that guide rod 22 is placed in valve body 1 is provided with positioning ring 25, positioning ring 25 limits flap 6 above, flap 6 tops contact with barrier film 21, guide rod 22 stretches into valve cover cavity 19 linking springs seats 16 and is fixed by nut 15, coordinate flap 6 on valve body 1, to be provided with valve seat 3, valve seat 3 is provided with sealing gasket 23 with flap 6 contact segments, be provided with pilot hole 26 at valve seat 3 centers, pilot hole 26 is for positioning and guiding bar 22, guide rod 22 can move up and down in pilot hole 26, valve seat 3 is made as one with valve body 1, and valve body 1 is separated into snout cavity 2 and outlet plenum 24 two-part by valve seat 3, flap 6 is positioned at outlet plenum 2, also be provided with sewage draining exit 27 prepares with the plug 28 of removing contamination in valve body 1 bottom.
Between the snout cavity 2 of described valve body 1 and valve cover cavity 19, be connected by conduit 4, and be provided with current limliting pilot valve 9 on this conduit 4, after current limliting pilot valve 9, be provided with one-way valve 11, before current limliting pilot valve 9, be also provided with filter 7, filter 7 is provided with ball valve 5 above, and described current limliting pilot valve 9 is for controlling pump head, i.e. water pump inlet outlet pressure differential, there is the effect to the control of water pump inlet outlet pressure differential, on current limliting pilot valve 9, be provided with connection mouth 10 and be connected with pump entrance; Between the outlet plenum 24 of described valve body 1 and valve cover cavity 19, be also provided with conduit 18 and be connected, and be provided with needle value 17 on this conduit 18.
Working principle of the present utility model is as follows, current are entered by the snout cavity 2 of valve body 1 through exit of pump, after flap 6 throttling restrictions, flow to outlet plenum 24, play metering function, in the time that pump head is greater than the control pressure reduction of current limliting pilot valve 9, current limliting pilot valve 9 is in closed condition, flap 6 can reach maximum opening under the water pressure pushing of snout cavity 2, in the time that needs change flow and reduce water pump operation number of units, the pump capacity moving will increase, lift reduces, in the time that lift is less than the control pressure reduction of current limliting pilot valve 9, current limliting pilot valve 9 is opened, part current flow into valve cover cavity 19 after current limliting pilot valve 9 and one-way valve 11, cause the water pressure in valve cover cavity 19 to increase, barrier film 21 drives flap 6 to move down, the overflow section having reduced between flap 6 and valve seat 3 amasss, its water flow reduces thereupon, pump head increases thereupon, in the time reaching state of equilibrium, pump head is the control pressure reduction of current limliting pilot valve 9, in the time switching off the pump, outlet plenum 24 pressure of valve body 1 are greater than snout cavity 2 pressure, and current flow into valve cover cavity 19 through needle value 17, and valve cover cavity 19 pressure increase, and barrier film 21 drives flap 6 to close, and plays the effect of buffer valve.
Claims (5)
1. a flow restricted check valve is mainly by valve body, valve seat, flap, filter, valve gap, current limliting pilot valve, spring, spring seat, needle value, barrier film and guide rod composition, it is characterized in that, valve body and valve gap are bolted connection, centre is provided with barrier film valve body and valve gap is separated, valve gap is placed in valve body top, between valve gap and barrier film, form valve cover cavity, valve seat and valve body are made as one, and valve body is separated into snout cavity and outlet plenum two-part by valve seat, between the snout cavity of described valve body and valve cover cavity, be connected by conduit, and on this conduit, be provided with current limliting pilot valve, after current limliting pilot valve, be provided with one-way valve, before current limliting pilot valve, be also provided with filter, before filter, be provided with ball valve, on current limliting pilot valve, being provided with connection mouth is connected with pump entrance.
2. flow restricted check valve according to claim 1, is characterized in that, is also provided with conduit and is connected, and be provided with needle value between the outlet plenum of described valve body and valve cover cavity on this conduit.
3. flow restricted check valve according to claim 1, is characterized in that, is provided with spring in valve cover cavity, and spring top coordinates with valve gap top, is also provided with relief opening and plug preparation at valve gap top, and spring bottom contacts with barrier film by spring seat.
4. flow restricted check valve according to claim 3, it is characterized in that, described flap is located in valve body, spring seat, barrier film and flap pass through guide rod, positioning ring and nut are fixed together, guide rod vertically arranges, and run through barrier film and two ends extend to respectively in valve cover cavity and valve body, the lower end that guide rod is placed in valve body is provided with positioning ring, above positioning ring, limit flap, flap top contacts with barrier film, guide rod stretches into valve cover cavity linking springs seat and is fixed by nut, coordinate flap on valve body, to be provided with valve seat, valve seat and flap contact segment are provided with sealing gasket, be provided with pilot hole at valve seat center.
5. flow restricted check valve according to claim 1, is characterized in that, flap is positioned at outlet plenum, is also provided with sewage draining exit and the plug preparation of removing contamination in valve body bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320862803.9U CN203743530U (en) | 2013-12-26 | 2013-12-26 | Flow-limiting check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320862803.9U CN203743530U (en) | 2013-12-26 | 2013-12-26 | Flow-limiting check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203743530U true CN203743530U (en) | 2014-07-30 |
Family
ID=51343331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320862803.9U Expired - Fee Related CN203743530U (en) | 2013-12-26 | 2013-12-26 | Flow-limiting check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203743530U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104358916A (en) * | 2014-11-11 | 2015-02-18 | 明珠阀门集团有限公司 | Independent hydraulically-controlled flow balance valve |
| CN104565488A (en) * | 2015-01-26 | 2015-04-29 | 马景岗 | Steel-made welding pressure difference control valve |
| CN105090531A (en) * | 2015-08-21 | 2015-11-25 | 阿拉尔石大国利科技有限公司 | Electric valve |
| CN111664274A (en) * | 2020-07-07 | 2020-09-15 | 宿迁联合市政工程有限公司 | Normally open diaphragm check valve |
| CN113187716A (en) * | 2021-06-30 | 2021-07-30 | 南通索星流体设备有限公司 | Full-automatic control check valve for water pump |
-
2013
- 2013-12-26 CN CN201320862803.9U patent/CN203743530U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104358916A (en) * | 2014-11-11 | 2015-02-18 | 明珠阀门集团有限公司 | Independent hydraulically-controlled flow balance valve |
| CN104358916B (en) * | 2014-11-11 | 2017-02-01 | 明珠阀门集团有限公司 | Independent hydraulically-controlled flow balance valve |
| CN104565488A (en) * | 2015-01-26 | 2015-04-29 | 马景岗 | Steel-made welding pressure difference control valve |
| CN105090531A (en) * | 2015-08-21 | 2015-11-25 | 阿拉尔石大国利科技有限公司 | Electric valve |
| CN105090531B (en) * | 2015-08-21 | 2018-11-27 | 新疆石大国利农业科技股份有限公司 | Motor-driven valve |
| CN111664274A (en) * | 2020-07-07 | 2020-09-15 | 宿迁联合市政工程有限公司 | Normally open diaphragm check valve |
| CN113187716A (en) * | 2021-06-30 | 2021-07-30 | 南通索星流体设备有限公司 | Full-automatic control check valve for water pump |
| CN113187716B (en) * | 2021-06-30 | 2021-08-31 | 南通索星流体设备有限公司 | Full-automatic control check valve for water pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140730 Termination date: 20151226 |
|
| EXPY | Termination of patent right or utility model |