CN102748510A - Micro-resistance spherical check valve - Google Patents
Micro-resistance spherical check valve Download PDFInfo
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- CN102748510A CN102748510A CN2012102554402A CN201210255440A CN102748510A CN 102748510 A CN102748510 A CN 102748510A CN 2012102554402 A CN2012102554402 A CN 2012102554402A CN 201210255440 A CN201210255440 A CN 201210255440A CN 102748510 A CN102748510 A CN 102748510A
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- 239000012530 fluid Substances 0.000 claims abstract description 35
- 210000002435 tendon Anatomy 0.000 claims description 7
- 239000013013 elastic material Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 20
- 230000006378 damage Effects 0.000 abstract description 7
- 206010044565 Tremor Diseases 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 238000005086 pumping Methods 0.000 description 12
- 229910000831 Steel Inorganic materials 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 239000007788 liquid Substances 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 229920001971 elastomer Polymers 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 3
- 230000001066 destructive effect Effects 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 230000000452 restraining effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 1
- 208000004350 Strabismus Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 210000001124 body fluid Anatomy 0.000 description 1
- 239000010839 body fluid Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920001195 polyisoprene Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000004642 transportation engineering Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
本发明公开了一种微阻球型止回阀。包括前阀体和后阀体构成的止回阀体、设置于止回阀体中的球和锥型体，锥型体沿止回阀体中心轴线对称布置，锥型体大端的最大内径不小于球的直径；锥型体前端有球道，球道沿流体流动方向设置并由3至4根柱状连接筋构成；锥型体固定在后阀体顺流体流动方向布置的流道分隔板上。本发明通过对多流道的后阀体中锥型体的设置，解决球的颤抖问题和减少水力损失；设置球道使球在后阀体中运行并控制球的运动距离及时间，达到控制水锤大小的目的，从而减轻对管道系统的破坏，实现安全运行。本发明微阻球型止回阀水力损失小，管道水力振动小，安全可靠性高，具有较好的防水锤和节能效果。
The invention discloses a micro-resistance ball check valve. It includes the check valve body composed of the front valve body and the rear valve body, the ball and the cone body arranged in the check valve body, the cone body is arranged symmetrically along the central axis of the check valve body, and the maximum inner diameter of the large end of the cone body Smaller than the diameter of the ball; the front end of the cone has a ballway, which is arranged along the direction of fluid flow and is composed of 3 to 4 columnar connecting ribs; the cone is fixed on the flow channel dividing plate arranged along the direction of fluid flow on the rear valve body. The present invention solves the trembling problem of the ball and reduces hydraulic loss by setting the cone in the multi-channel rear valve body; sets the ball path to make the ball run in the rear valve body and controls the movement distance and time of the ball to achieve water control. The purpose of reducing the size of the hammer, thereby reducing damage to the pipeline system and achieving safe operation. The micro-resistance ball type check valve of the present invention has small hydraulic loss, small pipeline hydraulic vibration, high safety and reliability, and better anti-hammer and energy-saving effects.
Description
Technical field
The invention belongs to fluid line open and close valve design field, relate in particular to stoping the liquid reverse flow and preventing the heavy caliber that destructive water hammer takes place, the fluid line open and close valve of frequent start-stop, particularly a kind of little resistance ball check valve.
Background technique
As everyone knows, in the FLUID TRANSPORTATION engineering, safety check is opened during as the pipe-line system following current; The valve of closing during adverse current; Be mainly used in and prevent that medium from flowing backwards, prevent the unexpected surge wave that produces when out of service of water pump and drive motor, alleviate destruction pipe-line system.
The existing safety check that uses comprises Swing check valve, Lift check valve, butterfly check valve and ball check valve.Swing check valve has a linkage, also has a flap as door freely to lean against on the valve base surface of inclination, can both arrive the correct position of valve seat surface in order to ensure flap at every turn; Flap design has linkage; Open the space so that flap has enough revolving, and flap is contacted with valve seat all sidedly, flap can all be processed with metal; Also can on metal, inlay leather, rubber, perhaps adopt synthetic coverage rate, this depends on the requirement of usability.Therefore Swing check valve is under the situation of opening fully, and hydrodynamic pressure is interrupted hardly, and the pressure through valve falls lessly relatively, but flap is when partially opening fluid through valve body, and the convection cell resistance is big, and loss increases.The flap of Lift check valve is positioned on the valve body upper valve base sealing surface, and except flap can freely go up and down, remaining part was the same as stop valve; Hydrodynamic pressure makes flap upwards lift from sealing surface of seat, and medium back flow causes flap to fall back on the valve seat, and the cut-out fluid flows; According to service condition, flap can be an all metal construction, also can be on valve petal shelf, to inlay forms such as rubber pad or rubber ring; As stop valve; Therefore fluid also is narrow through the passage of Lift check valve, and the pressure through Lift check valve falls greatlyyer than Swing check valve, and flow also receives certain restriction.The similar of butterfly check valve is in butterfly valve, the bearing pin rotation of flap in the valve seat, and it is simple in structure, can only be installed on the horizontal pipe, and sealing is relatively poor, and flow resistance, water hammer pressure are bigger.When ball check valve started when water pump, water was washed the steel core glueballs open under the effect of pressure, and the steel core glueballs is moved on the taper in the rear valve body, and fixing its position, and safety check is opened; After the termination of pumping, because the pressure of return water in the pipe-line system forces the steel core glueballs to move to front valve shell, the purpose of closing that reaches.Spheroid places each hole, and fluid is respectively walked its road in the process that gets into valve body and outflow valve body, do not disturb mutually, and vibration and noise that the impact force in the valve process of pass causes are little, and thoroughly eliminate the jumping ball fault.
The most general safety check of present domestic use is Swing check valve and Lift check valve, some shortcomings of ubiquity.For example the shortcoming of Swing check valve has: " loud noise " that produces owing to water hammering when closing and vibration; Because the valve plate vibration makes axle and the axle sleeve in the valve produce the mechanical friction campaign, when the valve plate vibration frequency was high more, axle and shaft room can produce serious wearing and tearing, and the method plate of causing comes off, and system protection was lost efficacy; When flap when partially opening, valve inner fluid fluidised form is disorderly, flow resistance loss is big etc.The shortcoming of Lift check valve has: flap that can free lifting is in rising to the process of complete opening, and flap is consuming the energy of fluid always, and drag losses is big, and fluid is narrow through the passage of Lift check valve, and the inflow-rate of water turbine restriction is bigger.The shortcoming of butterfly check valve has: drive the bearing pin serious wear of flap rotation, can only be installed on the horizontal pipe, sealing is relatively poor, and flow resistance, water hammer pressure are bigger etc.
The shortcoming of ball check valve has: after safety check was opened, glueballs was under the percussion of liquid, and it is serious to tremble, and the rubber on glueballs surface destroys fast.The fixing fixedly gussets that adopt the symmetry welding of cone body more, fluid flow produces inhibition, and the fluid flow forces loss is big.
Summary of the invention
The present invention discloses a kind of little resistance ball check valve according to the deficiency of existing technology.The problem that the present invention will solve is through the design to cone body in little resistance ball check valve; Eliminate the problem of trembling and minimizing hydraulic loss of ball; The operation of alley constraint ball in rear valve body is set; And the run duration of control ball when termination of pumping, alleviate destruction to pipe-line system, reach purpose of safe operation.
The present invention realizes through following technological scheme:
Little resistance ball check valve; Comprise check valve body that front valve shell and rear valve body constitute, be arranged at ball and cone body in the check valve body; It is characterized in that: said cone body is along check valve body central axis symmetric arrangement, and the maximum inner diameter of the big end of cone body is not less than the diameter of ball.
Said cone body front end has alley, and the flow direction setting of alley longshore current body also is made up of 3 to 4 column connecting tendons.
Said cone body is fixed on the runner demarcation strip of rear valve body following current body flow direction layout.
Said cone body is arranged on the check valve body central axis and/or is symmetricly set in around the check valve body central axis.
The said cone body that is arranged on the check valve body central axis is symmetrical normal cone body.
The said cone body that is symmetricly set in around the check valve body central axis is special-shaped cone, and the big end entrance cross section of special-shaped cone is vertical with fluid flow direction, and special-shaped cone afterbody is arranged along the rear valve body fluid flow direction.
The maximum inner diameter of the big end of preferred said cone body is identical with the diameter of ball.
Said alley length L is according in the different pipe-line systems; In satisfying pipeline, carry the flow velocity and the pressure of liquid to require down; After the front end incoming flow cuts off suddenly; Receive pressure of return water, the sealing station of valve body blocked the length L of the needed length of current as alley before and after ball needed in 2 seconds to be got back to by the cone body parcel location of rear valve body.The length L of alley of the present invention is 1.80～1.92 times of the radius of a ball.
Said ball surface coverage has uniform elastic material.
Little resistance ball check valve is designed to front valve shell and rear valve body composite structure because of the processing reason, through be arranged at ball in the check valve body move realize closing with opens check valve in the closing and opening of corresponding runner closed hole completion fluid passage.When open the fluid passage ball embed by the big end opening of the cone body that is provided with in the rear valve body fixing, when the fluid passage is closed in ball and the safety check corresponding runner closed hole embedding close; Safety check of the present invention is with check valve body central axis symmetric arrangement cone body; Promptly cone body can be set on central axis; Can be that the center of circle is symmetrical set cone body with the central axis on corresponding circumference, symmetrically arranged cone body can be provided with simultaneously also and can be provided with separately on the central axis, on the corresponding circumference of central axis; The big end opening of cone body is all vertical with fluid flow direction, and whole cone body is arranged by the big small end following current body flow direction of holding; The maximum inner diameter of the big end opening of cone body is not less than the diameter of ball; Be the fluid passage when opening ball have at least 1/2nd area to embed in the big end opening of cone body, when this opening state, the no direction fluid such as reverse in ball surface is stressed; Jitter does not take place in fixing-stable.
The present invention also is provided with alley at each cone body front end moves ball along alley in the opening and closing process; The flow direction setting of alley longshore current body also is made up of 3 to 4 column connecting tendons; The setting of alley is moved ball in the opening and closing process stable; The opening and closing process is rapid, can not squint; And 1.80～1.92 times according to the radius of a ball are provided with alley length; The column connecting tendon that alley adopts following current body flow direction to be provided with constitutes, and can not increase the resistance of convection cell, and it is better to be communicated with circulation efficiency.Alley structure control ball moves to the run duration of front valve shell from rear valve body when termination of pumping, the water hammer size that produces when realizing the unexpected termination of pumping of control, thus alleviate destruction to pipe-line system, reach purpose of safe operation.The water hammer that produces when comparing its termination of pumping with the conventional safety check of bore is little, and the hydraulic vibration of pipe-line system is little, only accounts for the 8%-12% of conventional safety check.
The present invention is fixed on cone body on the runner demarcation strip of rear valve body following current body flow direction layout; Promptly in check valve body, reduce the link different as far as possible, reduce the resistance of convection cell, cooperate the layout of cone body with fluid flow direction; The resistance that the present invention reduces convection cell has to the maximum limit improved circulation efficiency; Reduced the fluid force loss in the runner,, only accounted for the 5%-10% of conventional safety check with to compare its flow resistance with the conventional safety check of bore little.
In sum, when the little resistance ball check valve of the present invention used in pipe-line system, hydraulic loss was little, and the hydraulic vibration of pipe-line system is little, and the pipe-line system safety reliability is high, helped the trouble-saving purposes such as anti-preferably water hammer and energy-saving effect that have.The present invention solves the problem of trembling and minimizing hydraulic loss of ball through the setting to the cone body of control ball in the rear valve body in multithread road.Alley is set ball is moved in rear valve body, and the control ball moves to the run duration of front valve shell from rear valve body when termination of pumping, the water hammer size that produces when reaching the unexpected termination of pumping of control, thus alleviate destruction to pipe-line system, reach purpose of safe operation.
Description of drawings
Fig. 1 is a safety check cross section structure schematic representation of the present invention;
Fig. 2 is Figure 1A A face structural representation;
Fig. 3 is a kind of structural representation of cone body of the present invention;
Fig. 4 is the another kind of structural representation of cone body of the present invention;
Fig. 5 is cone body of the present invention and alley structural representation;
Fig. 6 is cone body of the present invention and alley structural section schematic representation.
Among the figure, the 1st, last adpting flange, the 2nd, front valve shell, the 3rd, the first two adpting flange, the 4th, back two adpting flanges; The 5th, runner closed hole, the 6th, alley, the 8th, cone body, the 9th, rear valve body; The 10th, back one adpting flange, the 11st, preceding runner demarcation strip, the 12nd, runner, the 13rd, back runner demarcation strip; The 14th, steel ring, the 15th, connecting tendon, the 16th, the special-shaped section of cone body, the 17th, cone body right cone section.
Embodiment
Through embodiment the present invention is further described below; Present embodiment only is used for the present invention is further explained; But can not be interpreted as the restriction to protection domain of the present invention, those skilled in the art can make the scope that some nonessential improvement and adjustment belong to the present invention's protection according to the content of the invention described above.
In conjunction with Fig. 1 to Fig. 6.
As shown in the figure; Little resistance ball check valve; Comprise check valve body that front valve shell 2 and rear valve body 9 constitute, be arranged at ball 7 and cone body 8 in the check valve body, cone body 8 is along check valve body central axis symmetric arrangement, and the maximum inner diameters of cone body 8 big ends are not less than the diameter of ball 7.
The maximum inner diameter of preferred cone body 8 big ends is identical with the diameter of ball 7.
The length L of alley 6 is 1.80～1.92 times of ball 7 radiuses.
The present invention is described for ease, and this example adopts seven runner closed holes, 5 structures as shown in the figure.A back adpting flange 10 that comprises that last adpting flange 1, rear valve body 9 that front valve shell 2, rear valve body 9, front valve shell 2 connect with pipeline connect with pipeline, the first two adpting flange 3 that the front and back valve body is coupled to each other and back two adpting flanges 4, runner closed hole 5, alley 6, ball 7 and cone body 8 constitute; Alley 6 is made up of two steel rings 14 and four cylinder steel bar connecting tendons 15; The cone body 8 of circumferential arrangement is made up of with right cone section 17 special-shaped section 16; In Fig. 5 and Fig. 6; The welding position of special-shaped section 16 of the location mark of line a and right cone section 17, preceding runner demarcation strip 11, back runner demarcation strip 13 constitute fluid courses 12.Fluid gets into front valve shell 2 through the pipeline that connects with front valve shell 2, and through runner independently separately in the front valve shell 2, gets into the bound fraction of front valve shell 2 and rear valve body 9; Ball 7 leaves front valve shell 2 under the thrust of fluid, in the alley 6 of rear valve body 9, move to cone body 8; And under the effect of the reaction force of hydrodynamic pressure and cone body 8; Be pressed on the cone body 8, this moment, safety check was opened fully, passed through the runner 12 of rear valve body 9 correspondences from the fluid of front valve shell 2; Be discharged in the pipeline that rear valve body 9 connected and go, thereby accomplish the overall process that safety check is opened overcurrent.When termination of pumping; Ball 7 in little resistance ball check valve in the pipeline is under pressure of return water, and the cone body 8 from rear valve body 9 breaks away from, and in alley 6, moves to the runner closed hole 5 of front valve shell 2; Block fluid, stop liquid reverse flow and the generation that prevents destructive water hammer.Thereby pipe-line system and corresponding apparatus thereof are protected, made pipe-line system reach safety, aim of stable operation.
The independent runner ball check valve that the present invention studied according to the fluid winding flow characteristic, is optimized analysis through CFD; Taper 8 structural types to arranging in the rear valve body 9 are optimized, and have designed special-shaped taper 8 structures of a kind of streamline, and the overwhelming majority that makes ball 7 in each independent runner is all in the parcel of taper 8; Improved the stress of ball 7 in rear valve body 9 in the safety check; During the valve body standard-sized sheet, taper 8 force analysis of circumferential arrangement are as shown in Figure 4, wherein F
1Fluid acts on the pressure of ball 7, F during expression ball valve standard-sized sheet
2Special-shaped section 16 heads of taper 8 are to the restraining force of ball 7, F during expression ball valve standard-sized sheet
3The reaction force of 16 pairs of balls 7 of special-shaped section of taper 8 during expression ball valve standard-sized sheet, F
4Special-shaped section 16 heads of taper 8 are to the restraining force of ball 7, F during expression ball valve standard-sized sheet
3XThe reaction force F of 16 pairs of balls 7 of special-shaped section of taper 8 during expression ball valve standard-sized sheet
3At the component of x direction, F
3yThe reaction force F of 16 pairs of balls 7 of special-shaped section of taper 8 during expression ball valve standard-sized sheet
3At the component of y direction, these power have F when the ball valve standard-sized sheet
1+ F
3X=0, F
4+ F
2+ F
3Y=0, when pipeline carries out the liquid conveying, under different flow rate; After ball valve is opened entirely; Ball 7 all can be pressed in the special-shaped taper 8 under the active force of water pressure and taper 8, and keeps static balancing, thereby eliminates ball 7 owing to produce the phenomenon of trembling when receiving force unbalance; Slow down the destruction on ball 7 surfaces, and reduce because the hydraulic loss of trembling and producing of ball 7.The taper 8 that is arranged on the check valve body central axis is stressed similar, and because symmetrical balance is provided with stressed more balance.Taper 8 welds together its structure such as Fig. 5, shown in Figure 6 with alley 6; The gusset that has welded when in the flow channel space at taper 8 places, having cancelled existing ball check valve at the fixed symmetrical taper; Inhibition when reducing rear valve body 9 fluid flow; Thereby when ball valve is opened, reduced the hydraulic loss of the runner section that belongs at taper 8 when liquid flows in rear valve body 9.With to compare its flow resistance with the conventional safety check of bore little, only account for the 5%-10% of conventional safety check.Size to alley 6 is optimized simultaneously; The pass valve path of ball 7 when termination of pumping in the control ball valve; Promptly like Fig. 5, length L shown in Figure 6 size, thereby control ball 7 moves to the run duration of front valve shell 2 from rear valve body 9 when termination of pumping, the water hammer size that produces when reaching the unexpected termination of pumping of control; Thereby alleviate destruction, reach purpose of safe operation pipe-line system.The water hammer that produces when comparing its termination of pumping with the conventional safety check of bore is little, and the hydraulic vibration of pipe-line system is little, only accounts for the 8%-12% of conventional safety check.
This routine ball 7 adopts the steel core glueballs, and promptly steel ball surface is coated with materials such as elastic caoutchouc or elastomeric plastics.The steel core glueballs can further increase sealing effect, and is more reliable and more stable when closing and open.
Claims (9)
1. little resistance ball check valve; Comprise check valve body that front valve shell (2) and rear valve body (9) constitute, be arranged at ball (7) and cone body (8) in the check valve body; It is characterized in that: said cone body (8) is along check valve body central axis symmetric arrangement, and the maximum inner diameter of the big end of cone body (8) is not less than the diameter of ball (7).
2. little resistance ball check valve according to claim 1 is characterized in that: said cone body (8) front end has alley (6), and alley (6) longshore current body flow direction is provided with and is made up of 3 to 4 column connecting tendons (15).
3. little resistance ball check valve according to claim 2 is characterized in that: said cone body (8) is fixed on the runner demarcation strip of following current body flow direction layout.
4. little resistance ball check valve according to claim 3 is characterized in that: said cone body (8) is arranged on the check valve body central axis and/or is symmetricly set in around the check valve body central axis.
5. little resistance ball check valve according to claim 4 is characterized in that: the said cone body (8) that is arranged on the check valve body central axis is symmetrical normal cone body.
6. little resistance ball check valve according to claim 4; It is characterized in that: the said cone body (8) that is symmetricly set in around the check valve body central axis is special-shaped cone; The big end entrance cross section of abnormity cone is vertical with fluid flow direction, and special-shaped cone afterbody is arranged along rear valve body (9) fluid flow direction.
7. according to claim 5 or 6 described little resistance ball check valves, it is characterized in that: the maximum inner diameter of the big end of said cone body (8) is identical with the diameter of ball (7).
8. little resistance ball check valve according to claim 3 is characterized in that: the length L of said alley (6) is 1.80～1.92 times of ball (7) radius.
9. little resistance ball check valve according to claim 3 is characterized in that: said ball (7) surface coverage has uniform elastic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102554402A CN102748510A (en) | 2012-07-23 | 2012-07-23 | Micro-resistance spherical check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102554402A CN102748510A (en) | 2012-07-23 | 2012-07-23 | Micro-resistance spherical check valve |
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| Publication Number | Publication Date |
|---|---|
| CN102748510A true CN102748510A (en) | 2012-10-24 |
Family
ID=47028915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102554402A Pending CN102748510A (en) | 2012-07-23 | 2012-07-23 | Micro-resistance spherical check valve |
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| Country | Link |
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| CN (1) | CN102748510A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104389779A (en) * | 2014-10-29 | 2015-03-04 | 于长和 | Slow opening and closing ball core check valve |
| CN109973375A (en) * | 2019-05-20 | 2019-07-05 | 淮安市威力泵业科技有限公司 | A kind of unidirectional valve group of parallel metering pump inlet and outlet |
| CN112161087A (en) * | 2020-09-28 | 2021-01-01 | 陈科 | Spherical one-way check valve |
| CN112161088A (en) * | 2020-09-28 | 2021-01-01 | 林翔 | Ball check valve capable of being opened and closed quickly |
| CN112228598A (en) * | 2020-09-28 | 2021-01-15 | 陈艳 | Ball check valve capable of being opened and closed quickly |
| CN117128359A (en) * | 2023-10-25 | 2023-11-28 | 江苏特一机械股份有限公司 | Double-plate ball valve with bidirectional pressure monitoring function |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2268158Y (en) * | 1996-05-03 | 1997-11-19 | 张昕 | Large-diameter multi-channel micro-resistance ball check valve |
| CN2348209Y (en) * | 1998-08-18 | 1999-11-10 | 曹峰 | Ball check valve |
| JP2004138084A (en) * | 2002-10-15 | 2004-05-13 | Tlv Co Ltd | Check valve |
| CN200975526Y (en) * | 2006-11-23 | 2007-11-14 | 张明亮 | Waterpower silencing non-return valve |
| CN201391651Y (en) * | 2009-04-15 | 2010-01-27 | 邵杏林 | Energy-saving slow-closure ball check valve |
| CN201475445U (en) * | 2009-07-27 | 2010-05-19 | 安徽铜都阀门有限公司 | An angle ball check valve |
-
2012
- 2012-07-23 CN CN2012102554402A patent/CN102748510A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2268158Y (en) * | 1996-05-03 | 1997-11-19 | 张昕 | Large-diameter multi-channel micro-resistance ball check valve |
| CN2348209Y (en) * | 1998-08-18 | 1999-11-10 | 曹峰 | Ball check valve |
| JP2004138084A (en) * | 2002-10-15 | 2004-05-13 | Tlv Co Ltd | Check valve |
| CN200975526Y (en) * | 2006-11-23 | 2007-11-14 | 张明亮 | Waterpower silencing non-return valve |
| CN201391651Y (en) * | 2009-04-15 | 2010-01-27 | 邵杏林 | Energy-saving slow-closure ball check valve |
| CN201475445U (en) * | 2009-07-27 | 2010-05-19 | 安徽铜都阀门有限公司 | An angle ball check valve |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104389779A (en) * | 2014-10-29 | 2015-03-04 | 于长和 | Slow opening and closing ball core check valve |
| CN109973375A (en) * | 2019-05-20 | 2019-07-05 | 淮安市威力泵业科技有限公司 | A kind of unidirectional valve group of parallel metering pump inlet and outlet |
| CN112161087A (en) * | 2020-09-28 | 2021-01-01 | 陈科 | Spherical one-way check valve |
| CN112161088A (en) * | 2020-09-28 | 2021-01-01 | 林翔 | Ball check valve capable of being opened and closed quickly |
| CN112228598A (en) * | 2020-09-28 | 2021-01-15 | 陈艳 | Ball check valve capable of being opened and closed quickly |
| CN117128359A (en) * | 2023-10-25 | 2023-11-28 | 江苏特一机械股份有限公司 | Double-plate ball valve with bidirectional pressure monitoring function |
| CN117128359B (en) * | 2023-10-25 | 2024-01-12 | 江苏特一机械股份有限公司 | Double-plate ball valve with bidirectional pressure monitoring function |
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Application publication date: 20121024 |