CN101382207B - Bidirectional control valve and motorcycle water-cooling device with the bidirectional control valve - Google Patents
Bidirectional control valve and motorcycle water-cooling device with the bidirectional control valve Download PDFInfo
- Publication number
- CN101382207B CN101382207B CN2007100926645A CN200710092664A CN101382207B CN 101382207 B CN101382207 B CN 101382207B CN 2007100926645 A CN2007100926645 A CN 2007100926645A CN 200710092664 A CN200710092664 A CN 200710092664A CN 101382207 B CN101382207 B CN 101382207B
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- water
- control valve
- rubber pad
- bidirectional control
- rubber cushion
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Abstract
The invention provides a bidirectional control valve which is provided with an internal cover in a valve chamber formed between an upper shell and a lower shell; the lower sealing end of the internal cover is provided with a water inlet hole; the internal cover is internally provided with a rubber pad seat; the upper sealed end of the rubber pad seat is provided with a water returning hole; a clearance is arranged between a lower opening end and the internal bottom wall of the internal cover; the external wall of the rubber pad seat is provided with a ring-shaped bulge; a rubber pad is sleeved below the ring-shaped bulge; a clearance is arranged between the rubber pad and the external wall of the ring-shaped bulge and the internal side wall of the internal cover; the rubber pad seat is internally provided with a rubber pad which is supported by a first spring; furthermore, a clearance is arranged between the external wall of the rubber pad and the internal side wall of the rubber pad seat; furthermore, a second spring is sleeved on the rubber pad seat. The bidirectional control valve has good sensitiveness, can open the passage between a radiator and an auxiliary water tank in time, effectively prevents the explosion of the radiator, the bidirectional control valve, the water pipe and the like, ensures the usage performance and the service life, and has the advantages of smart concept, easy disassembly and assembly, convenient water adding, and the like.
Description
Technical field
The present invention relates to a kind of cooling motorcycle water member, the motorcycle water-cooling device that relates in particular to bidirectional control valve and this bidirectional control valve is housed.
Background technique
At present, the motor of cooling motorcycle water generally is connected with radiator by inlet tube and outlet tube, under the pumping action of engine embedded or external water pump, motor, engine water outlet, radiator and water inflow of the engine pipe are formed a circulation, current are constantly taken away the heat that engine running produces, by flowing back in the motor again after the radiator cooling.Because the water in the process of work in the radiator is along with variation of temperature, its volume and pressure all can change, therefore must set up a secondary water tank, this pair water tank is connected with the water outlet of bidirectional control valve by water pipe, and the water inlet tap of bidirectional control valve communicates with the water supplement port of radiator.Like this when water generation volume in the radiator and variation in pressure, a part of water can enter secondary water tank or flows back to the radiator from secondary water tank by bidirectional control valve; When the water yield is not enough in the radiator, can also turn on bidirectional control valve, add water by water supplement port.
Existing bidirectional control valve is made up of the upper shell of taking back water nozzle, the lower shell body of bringing water nozzle into and mangetic core assembly, wherein upper and lower casing is interlockingly connected and rotates fixing, the inside of two housings forms valve pocket, mangetic core assembly is installed in the valve pocket, and mangetic core assembly is made of parts such as spool, spring seat, spring and sealing gaskets.When the hydraulic pressure between backwater mouth and the water inlet tap forms pressure difference, mangetic core assembly can be opened the water intake of valve pocket automatically under the promotion of hydraulic pressure, make between radiator and the secondary water tank and form water-flowing path, water temperature raises in the radiator to eliminate, pressure increases the influence that brings.This bidirectional control valve generally has the following disadvantages:
Will have very big pressure could promote the length of spring compressed of mangetic core assembly when 1, the water in the radiator expands, the water intake of valve pocket is opened, sensitivity is relatively poor; If the water intake of valve pocket can not in time be opened, and the hydraulic pressure in the radiator can cause radiator, bidirectional control valve and water pipe explosion enough greatly the time.
2, employing is fastened between the upper and lower casing, bad contraposition during installation, and cause dismounting difficult because of stuck easily between upper and lower casing, add water and change very inconvenience of mangetic core assembly.
3, mangetic core assembly will bear very big extruding force and frictional force in the process of dismounting upper and lower casing, is damaged easily, loses efficacy, and does not ensure in usability and working life.
4, bidirectional control valve is covered by covering fully, and the covering of must dismantling earlier when needs add water just can carry out, and is very inconvenient; The dismounting covering also causes its damage easily continually.
Summary of the invention
One of purpose of the present invention is to provide that a kind of sensitivity is good, the bidirectional control valve of easy accessibility.
As follows for reaching the technological scheme that above purpose adopts: a kind of bidirectional control valve, comprise the upper shell of taking back water nozzle, the lower shell body of bringing water nozzle into, its key is: between the described upper and lower casing by being threaded, in both inner valve pockets that form inner cap is housed, the open-mouth end of this inner cap up, closed end down, and the central authorities of closed end have the water inlet; In described inner cap, be provided with upper end closed, the uncovered rubber cushion seat in lower end, the last closed end of this rubber cushion seat has backwater hole, has the gap between the lower opening end of described rubber cushion seat and the interior diapire of described inner cap, on the outer wall of rubber cushion seat, be provided with annular boss, the below suit rubber cushion of annular boss, have the gap between the outer wall of this rubber cushion and annular boss and the madial wall of inner cap, and the bottom surface of rubber cushion can contact with the interior diapire of inner cap; Being equipped with in described rubber cushion seat can be with the rubber pad of described backwater hole sealing, and this rubber pad is supported by first spring, and has the gap between the madial wall of the outer wall of rubber pad and described rubber cushion seat; Also be set with second spring outside described rubber cushion seat, the lower end of this second spring is spacing by annular boss, and the upper end is spacing by the inner roof wall of described upper shell.
Adopt above technological scheme, the backwater mouth of upper shell communicates with secondary water tank by water pipe, and the water inlet tap of lower shell body is connected with the water supplement port of radiator by water pipe.Under nature, the interior diapire contact seal of the bottom surface of rubber cushion and inner cap, the backwater hole on rubber cushion seat top is by rubber seal.When engine operation, in-engine hot water enters in the radiator by engine water outlet, make water temperature rising in the radiator, volumetric expansion, the hydraulic pressure at bidirectional control valve water inlet tap place is greater than the hydraulic pressure at backwater mouth place, so a part of current enter inner cap inside by the water inlet of inner cap bottom, under the impact of current, rubber cushion seat and rubber pad move upward, second spring is compressed, the interior diapire of inner cap is left in the bottom of rubber cushion on the while rubber cushion seat, and current are from rubber cushion, gap on the rubber cushion seat between the outer wall of annular boss and the inner cap madial wall enters the top of annular boss, and enters in the secondary water tank by the backwater mouth and to lay in, treat into, when the hydraulic pressure between the backwater mouth equates, under the effect of the gravity and second spring force, the downward return of rubber cushion seat and rubber pad, the bottom surface of rubber cushion again with the interior diapire contact seal of inner cap.
When motor quits work, volume can diminish after the water cooling in the radiator, the hydraulic pressure at backwater mouth place is greater than the hydraulic pressure at water inlet tap place, the water of rubber cushion seat ring shape boss top impacts rubber pad by backwater hole in the inner cap, the elastic force that makes rubber pad overcome first spring moves downward, current enter the below of rubber pad by the gap between rubber pad outer wall and the rubber cushion seat madial wall, and water inlet and the water inlet tap by the inner cap bottom successively, be back in the radiator, treat into, when the hydraulic pressure between the backwater mouth equates, under the effect of first spring force, rubber pad upwards resets, and again backwater hole is sealed.
The present invention makes that by the ingenious assembly relation that each parts in the valve pocket are set bidirectional control valve can be worked thereupon when pressure difference occurring between water inlet tap and the backwater mouth, and sensitivity is good; Bidirectional control valve can in time be opened the path between radiator and the secondary water tank, has effectively prevented radiator, bidirectional control valve and water pipe generation explosion, and usability and working life are all secure.Adopt between the upper and lower casing to be threaded, connect between the two reliably, easy disassembling is changed inner member and adds water all very convenient.
The open-mouth end outward flanging of above-mentioned inner cap is evenly distributed with spacing card by circumference on this flange, and the pawl type dop of this spacing card upper end snaps in the annular groove corresponding on the upper shell madial wall.Adopt clamping to cooperate between inner cap and the upper shell, both be convenient to assembling, can prevent effectively that again inner cap from taking place to become flexible.
Be evenly distributed with fin by circumference on the madial wall of above-mentioned inner cap, the outer wall of annular boss is fitted on this fin and the described rubber cushion seat.Gap between the two adjacent fins stream that can supply water passes through, and fin has positioning action to the rubber cushion seat, guarantees that the rubber cushion seat only does upper and lower motion in the axial direction.
In order to adapt to the installation of rubber cushion seat, rubber cushion and first spring better, low in the middle of the interior diapire of above-mentioned inner cap is, high step-like all around, pass through conical surface transition between the upper and lower step surface.
In order to reach better sealing effect, be provided with a circle flange in the bottom of above-mentioned rubber cushion, this flange can contact with the terrace of appearing on the stage of diapire in the described inner cap.
On the madial wall of above-mentioned rubber cushion seat, be evenly distributed with fin by circumference, the stepped shape that described rubber pad is big up and small down, the appear on the stage outer wall in stage and described fin of rubber pad fitted.Gap between the adjacent lugs stream that can supply water passes through, and fin is lined with positioning action to rubber, guarantees that rubber pad only does upper and lower motion in the axial direction.
In order to prevent that first spring is distorted in the process of work, the upper end of above-mentioned first spring was sleeved on the leave from office stage of rubber pad, and spacing by the step surface on the rubber pad, and the lower end of first spring is spacing by the interior diapire of described inner cap.
In order to reach better sealing effect, the hole wall of backwater hole extends downwards on the above-mentioned rubber cushion seat, forms a circle flange, and this flange contacts with the bottom surface of described rubber pad.
Two of purpose of the present invention is to provide a kind of water motorcycle water-cooling device easily that adds.
As follows for reaching the technological scheme that above purpose adopts: a kind of motorcycle water-cooling device that above-mentioned bidirectional control valve is housed, comprise motor, engine water outlet, the water inflow of the engine pipe, radiator, secondary water tank and covering, wherein the water outlet of motor is connected with the water intake of radiator by engine water outlet, the water outlet of radiator is connected with the water intake of motor by the water inflow of the engine pipe, its key is: the water supplement port place at described radiator is connected to arm, the upper end of this arm is passed covering and is connected with the water inlet tap of bidirectional control valve, and the backwater mouth of bidirectional control valve communicates with described secondary water tank by water pipe.
The present invention is installed in bidirectional control valve the outside of covering, directly turning on bidirectional control valve when needs add water gets final product, need not dismantle covering again, it is more convenient to operate not only to add water, and the covering of effectively having avoided causing because of frequent dismounting in the background technique damages.
Beneficial effect: sensitivity of the present invention is good, it can in time open the path between radiator and the secondary water tank, prevented that effectively radiator, bidirectional control valve and water pipe etc. from explosion taking place, usability and working life are all secure, have to be skillfully constructed, easy disassembling, to add characteristics such as water is convenient.
Description of drawings
Fig. 1 is the structural representation of bidirectional control valve, also is the nature figure of bidirectional control valve when not working.
Fig. 2 is the working state figure of water inlet tap hydraulic pressure bidirectional control valve during greater than backwater mouth hydraulic pressure.
Fig. 3 is the working state figure of backwater mouth hydraulic pressure bidirectional control valve during greater than water inlet tap hydraulic pressure.
Fig. 4 is the structural representation of inner cap in the bidirectional control valve.
Fig. 5 is the plan view of Fig. 4.
Fig. 6 is the structural representation of rubber cushion seat in the bidirectional control valve.
Fig. 7 is the worm's eye view of Fig. 6.
Fig. 8 is the connection diagram of motorcycle water-cooling device.
Fig. 9 is the location diagram between bidirectional control valve and the covering in the constituent.
Embodiment
The invention will be further described below in conjunction with drawings and Examples:
As Fig. 1, Fig. 4 and shown in Figure 5, at the top of upper shell 2 backwater mouth 1 is housed, the endoporus of backwater mouth 1 communicates with the inner chamber of upper shell 2; The bottom of lower shell body 4 is formed with water inlet tap 3, and the endoporus of water inlet tap 3 communicates with the inner chamber of lower shell body 4.Upper shell 2 is sleeved on the lower shell body 4, between the two by being threaded, and the inner chamber of upper and lower casing 2,4 forms valve pocket, inner cap 5 is housed in this valve pocket, the open-mouth end of inner cap 5 up, closed end down, its open-mouth end outward flanging is evenly distributed with a plurality of spacing card 5b by circumference on this flange, and the pawl type dop of this spacing card 5b upper end snaps in the annular groove corresponding on upper shell 2 madial walls.Be evenly distributed with many fin 5c by circumference on the madial wall of described inner cap 5, fin 5c vertically arranges along the shaft axis of inner cap 5.The interior diapire of inner cap 5 is low in the middle of being, high step-like all around, by conical surface transition, and the central authorities of leave from office terrace have the water inlet 5a that communicates with water inlet tap 3 between the upper and lower step surface.
As Fig. 1, Fig. 6 and shown in Figure 7, upper end closed, the uncovered rubber cushion seat 6 in lower end are installed in inner cap 5, the last closed end of this rubber cushion seat 6 has the backwater hole 6a that communicates with backwater mouth 1, has the gap between the lower opening end of rubber cushion seat 6 and the interior diapire of inner cap 5, on the outer wall of rubber cushion seat 6, be formed with annular boss 6b, fin 5c on the outer wall of this annular boss 6b and inner cap 5 walls fits, and has the gap between the madial wall of the outer wall of annular boss 6b and inner cap 5.At the part suit rubber cushion 7 that is positioned on the rubber cushion seat 6 below the annular boss 6b, the bottom of rubber cushion 7 is provided with a circle flange, and this flange contacts with the terrace of appearing on the stage of diapire in the inner cap 5 in the raw the time at bidirectional control valve; Also has the gap between the madial wall of the outer wall of rubber cushion 7 and inner cap 5.
As can be known from Fig. 1, be evenly distributed with many fin 6c by circumference on the madial wall of rubber cushion seat 6, fin 6c vertically arranges along the shaft axis of rubber cushion seat 6.Being equipped with in rubber cushion seat 6 can be with the rubber pad 8 of backwater hole 6a sealing, and the hole wall of backwater hole 6a extends downwards on the rubber cushion seat 6, forms a circle flange, and this flange contacts with the bottom surface of rubber pad 8 in the raw the time at bidirectional control valve.The appear on the stage outer wall and the fin 6c in stage of the stepped shape that rubber pad 8 is big up and small down, rubber pad 8 fits, and has the gap between the madial wall of the outer wall of rubber pad 8 and rubber cushion seat 6.The upper end of first spring 9 was sleeved on the leave from office stage of rubber pad 8, and spacing by the step surface on the rubber pad 8, and the lower end of first spring 9 is spacing by the interior diapire of inner cap 5.Be set with second spring 10 in the part that is positioned on the rubber cushion seat 6 above the annular boss 6b, the lower end of this second spring 10 is spacing by annular boss 6b, and the upper end is spacing by the inner roof wall of upper shell 2.
As Fig. 8 and shown in Figure 9, a kind of motorcycle water-cooling device that bidirectional control valve is housed, by motor 11, engine water outlet 12, water inflow of the engine pipe 13, radiator 14, secondary water tank 15, covering 16, arm 17, parts such as water pipe 18 and bidirectional control valve constitute, wherein the water outlet of motor 11 is connected with the water intake of radiator 14 by engine water outlet 12, the water outlet of radiator 14 is connected with the water intake of motor by water inflow of the engine pipe 13, water supplement port place at radiator 14 is connected to arm 17, the upper end of this arm 17 is passed covering 16 and is connected with the water inlet tap 3 of bidirectional control valve, and the backwater mouth 1 of bidirectional control valve communicates with described secondary water tank 15 by water pipe 18.Because bidirectional control valve is installed in the outside of covering 16, directly turns on bidirectional control valve and get final product when needs add water, need not dismantle covering 16 again, it is more convenient to operate not only to add water, and has effectively avoided damaging because of the covering that frequent dismounting causes.
Bidirectional control valve under nature, the terrace contact seal of appearing on the stage of diapires in the flange of rubber cushion 7 bottoms and the inner cap 5, the backwater hole 6a on rubber cushion seat 6 tops is by rubber pad 8 sealing (see figure 1)s.When engine operation, as shown in Figure 2, hot water in the motor 11 enters in the radiator 14 by engine water outlet 12, make water temperature rising in the radiator 14, volumetric expansion, the hydraulic pressure at bidirectional control valve water inlet tap 3 places is greater than the hydraulic pressure at backwater mouth 1 place, so a part of current enter inner cap 5 inside by the water inlet 5a of inner cap 5 bottoms, under the impact of current, rubber cushion seat 6 and rubber pad 8 move upward, second spring 10 is compressed, the interior diapire of inner cap 5 is left in the bottom of rubber cushion 7 on the while rubber cushion seat 6, the outer wall of current annular boss 6b from the rubber cushion seat 6 and the top that the gap between inner cap 5 madial walls enters annular boss 6b, and enter in the secondary water tank 15 deposit by backwater mouth 1, treat into, backwater mouth 3, when the hydraulic pressure between 1 equates, under the effect of gravity and second spring, 10 elastic force, rubber cushion seat 6 and rubber pad 8 downward returns, the flange of rubber cushion 7 bottoms again with the interior diapire contact seal of inner cap 5.
When motor quits work, as shown in Figure 3, volume can diminish after the water cooling in the radiator 14, the hydraulic pressure at backwater mouth 1 place is greater than the hydraulic pressure at water inlet tap 3 places, the water of rubber cushion seat 6 annular boss 6b top impacts rubber pad 8 by backwater hole 6a in the inner cap 5, the elastic force that makes rubber pad 8 overcome first spring 9 moves downward, current enter the below of rubber pad 8 by the gap between rubber pad 8 outer walls and rubber cushion seat 6 madial walls, and water inlet 5a and the water inlet tap 3 by inner cap 5 bottoms successively, be back in the radiator 14, treat into, backwater mouth 3, when the hydraulic pressure between 1 equates, under the effect of first spring, 9 elastic force, rubber pad 8 upwards resets, and again backwater hole 6a is sealed.
Claims (9)
1. bidirectional control valve, comprise the upper shell (2) of taking back water nozzle (1), the lower shell body (4) of bringing water nozzle (3) into, it is characterized in that: between the described upper and lower casing (2,4) by being threaded, in both inner valve pockets that form inner cap (5) is housed, the open-mouth end of this inner cap (5) up, closed end down, and the central authorities of closed end have water inlet (5a); In described inner cap (5), be provided with upper end closed, the uncovered rubber cushion seat (6) in lower end, the last closed end of this rubber cushion seat (6) has backwater hole (6a), has the gap between the interior diapire of the lower open mouth end of described rubber cushion seat (6) and described inner cap (5), on the outer wall of rubber cushion seat (6), be provided with annular boss (6b), the below suit rubber cushion (7) of annular boss (6b), have the gap between the madial wall of the outer wall of this rubber cushion (7) and annular boss (6b) and inner cap (5), and the bottom surface of rubber cushion (7) can contact with the interior diapire of inner cap (5); Being equipped with in described rubber cushion seat (6) can be with the rubber pad (8) of described backwater hole (6a) sealing, and this rubber pad (8) is supported by first spring (9), and has the gap between the madial wall of the outer wall of rubber pad (8) and described rubber cushion seat (6); Also be set with second spring (10) outside described rubber cushion seat (6), the lower end of this second spring (10) is spacing by annular boss (6b), and the upper end is spacing by the inner roof wall of described upper shell (2).
2. bidirectional control valve according to claim 1, it is characterized in that: the open-mouth end outward flanging of described inner cap (5), be evenly distributed with spacing card (5b) by circumference on this flange, the pawl type dop of this spacing card (5b) upper end snaps in the annular groove corresponding on upper shell (2) madial wall.
3. bidirectional control valve according to claim 1 is characterized in that: be evenly distributed with fin (5c) by circumference on the madial wall of described inner cap (5), this fin (5c) is fitted with the outer wall that described rubber cushion seat (6) is gone up annular boss (6b).
4. according to claim 1 or 2 or 3 described bidirectional control valves, it is characterized in that: the interior diapire of described inner cap (5) is low in the middle of being, high step-like all around, passes through conical surface transition between the upper and lower step surface.
5. bidirectional control valve according to claim 4 is characterized in that: be provided with a circle flange in the bottom of described rubber cushion (7), this flange can contact with the terrace of appearing on the stage of the interior diapire of described inner cap (5).
6. bidirectional control valve according to claim 1, it is characterized in that: on the madial wall of described rubber cushion seat (6), be evenly distributed with fin (6c) by circumference, the appear on the stage outer wall in stage and described fin (6c) of the big up and small down stepped shape of described rubber pad (8), rubber pad (8) fitted.
7. bidirectional control valve according to claim 6, it is characterized in that: the upper end of described first spring (9) was sleeved on the leave from office stage of rubber pad (8), and spacing by the step surface on the rubber pad (8), the lower end of first spring (9) is spacing by the interior diapire of described inner cap (5).
8. according to claim 1 or 6 described bidirectional control valves, it is characterized in that: the hole wall that described rubber cushion seat (6) is gone up backwater hole (6a) extends downwards, forms a circle flange, and this flange contacts with the bottom surface of described rubber pad (8).
9. motorcycle water-cooling device that the described bidirectional control valve of claim 1 is housed, comprise motor (11), engine water outlet (12), water inflow of the engine pipe (13), radiator (14), secondary water tank (15) and covering (16), wherein the water outlet of motor (11) is connected with the water intake of radiator (14) by engine water outlet (12), the water outlet of radiator (14) is connected with the water intake of motor by water inflow of the engine pipe (13), it is characterized in that: be connected to arm (17) at the water supplement port place of described radiator (14), the upper end of this arm (17) is passed covering (16) and is connected with the water inlet tap (3) of bidirectional control valve, and the backwater mouth (1) of bidirectional control valve communicates with described secondary water tank (15) by water pipe (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100926645A CN101382207B (en) | 2007-09-03 | 2007-09-03 | Bidirectional control valve and motorcycle water-cooling device with the bidirectional control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100926645A CN101382207B (en) | 2007-09-03 | 2007-09-03 | Bidirectional control valve and motorcycle water-cooling device with the bidirectional control valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101382207A CN101382207A (en) | 2009-03-11 |
| CN101382207B true CN101382207B (en) | 2010-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100926645A Expired - Fee Related CN101382207B (en) | 2007-09-03 | 2007-09-03 | Bidirectional control valve and motorcycle water-cooling device with the bidirectional control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101382207B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106439076B (en) * | 2016-12-26 | 2019-04-05 | 成都海瑞斯轨道交通设备有限公司 | A kind of main piston rod and air shut-off valve with type of respiration lubrication system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0350721A2 (en) * | 1988-07-09 | 1990-01-17 | DIETER WILDFANG GmbH | Flow limiter |
| DD284269A5 (en) * | 1989-05-24 | 1990-11-07 | Veb Blechverformungswerk Leipzig,Dd | PRESSURE COMPENSATING VALVE FOR GASOFUL OR LIQUID MEDIA IN CLOSED SYSTEMS |
| CN2233016Y (en) * | 1995-12-01 | 1996-08-14 | 涿州石油物探绿茵实业有限公司 | Two-way pressure valve |
| CN201103729Y (en) * | 2007-09-04 | 2008-08-20 | 力帆实业(集团)股份有限公司 | Bidirectional control valve and motorcycle water cooling system mounted with the same |
-
2007
- 2007-09-03 CN CN2007100926645A patent/CN101382207B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0350721A2 (en) * | 1988-07-09 | 1990-01-17 | DIETER WILDFANG GmbH | Flow limiter |
| DD284269A5 (en) * | 1989-05-24 | 1990-11-07 | Veb Blechverformungswerk Leipzig,Dd | PRESSURE COMPENSATING VALVE FOR GASOFUL OR LIQUID MEDIA IN CLOSED SYSTEMS |
| CN2233016Y (en) * | 1995-12-01 | 1996-08-14 | 涿州石油物探绿茵实业有限公司 | Two-way pressure valve |
| CN201103729Y (en) * | 2007-09-04 | 2008-08-20 | 力帆实业(集团)股份有限公司 | Bidirectional control valve and motorcycle water cooling system mounted with the same |
Non-Patent Citations (1)
| Title |
|---|
| JP昭60-136676A 1985.07.20 |
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| CN101382207A (en) | 2009-03-11 |
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