CN202139038U - Return oil preventing non-return valve - Google Patents
Return oil preventing non-return valve Download PDFInfo
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- CN202139038U CN202139038U CN201120220388U CN201120220388U CN202139038U CN 202139038 U CN202139038 U CN 202139038U CN 201120220388 U CN201120220388 U CN 201120220388U CN 201120220388 U CN201120220388 U CN 201120220388U CN 202139038 U CN202139038 U CN 202139038U
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- oil
- check valve
- return
- fuel
- oil pump
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Abstract
The utility model discloses a return oil preventing non-return valve. The return oil preventing non-return valve is arranged in a three-way pipeline of an oiling machine connected with an oil inlet of an oil pump and on a pipeline near one side of an oil storage tank. The three-way pipeline is a pipeline at the intersection of the oil inlet pipe of the oiling machine and the oil return pipe of an oil trough, and comprises the pipeline near the side of the oil storage tank, a pipeline near one side of the oil pump, and the oil return pipe of the oil trough. The utility model solves the problem that fuel directly enters into the oil trough in a reverse direction from the inlet of the oil pump through the oil return pipe when oil pressure is over-high, and is jet to the exterior of the oiling machine from the air outlet of the oil trough; meanwhile, through the adoption of the return oil-prevent non-return valve, the return oil flow rate of oil flowing to the oil pump from the oil trough is enlarged; and the problem that when excessive fuel is collected in the oil trough, fuel is jetted to the exterior of the oiling machine from the air outlet of the oil trough is solved. Therefore, the safety of the oiling machine is improved.
Description
Technical field
The utility model relates to the fuel charger field, is specifically related to a kind of anti-return check valve.
Background technology
Fuel charger is a kind ofly can from petrol storage tank, add liquid fuel such as gasoline, diesel oil in the power actuated vehicle a kind of device.
As shown in Figure 1, oil pump 4 is that liquid fuel is drawn into the executive device the fuel charger from petrol storage tank 1.Liquid fuel is when entering into oil pump 4, because a variety of causes, can there be a large amount of gases in inside.As directly will have the liquid fuel input flow rate meter of gas, can cause the inaccurate of metering, problems such as the noise increase in the refueling process.
For addressing the above problem, current liquid fuel within gets into before the FL/MTR, through gas-liquid separation device 5 with Oil-gas Separation in oil groove 8, oil gas gets into atmosphere through the air extractor duct 9 of oil groove.The oil gas that gets in the oil groove 8 can carry partially liq fuel, and when the liquid fuel in the oil groove 8 reached some, oil groove fuel-return valve 10 lifted, and fuel is got back to through oil groove oil return pipe 11 and entered into refueling process in the oil pump 4 once more.
Common petrol storage tank 1 liquid level position is certain distance below the oil pump inlet, if but this distance is too small, can produce oil groove return opening and the too small situation of fuel charger oil inlet difference of pressure.When oil pump running produces vacuum, fuel replenishes into vacuum chamber from oil groove return opening and fuel charger oil inlet simultaneously, and when oil groove return opening and fuel charger oil inlet difference of pressure were too small, the oil return speed of oil groove return opening slowed down.When the oil return speed of oil groove return opening during less than the oil-feed speed of oil tank inlet, the oil groove fuel can increase gradually, and when the oil groove fuel surpassed the oil groove air extractor duct, fuel can be sprayed onto outside the fuel charger from the oil groove air extractor duct.
And because petrol storage tank is installed lack of standardization; The petrol storage tank liquid level is higher than the oil groove liquid level; When causing oil pressure too high; Even fuel directly oppositely gets into oil groove through the oil groove oil return pipe from the oil pump inlet phenomenon (wherein the fuel the petrol storage tank is the oily machine that under the effect of oil pressure, gets into when oil pump is not opened) can take place.And gather when too much when the oil groove internal liquid, also can be sprayed onto outside the fuel charger from the oil groove air extractor duct, very easily cause safety misadventure.
Therefore, current needs improve the technical scheme of fuel charger structure, gather too much in oil groove inside to solve fuel, cause fuel to be sprayed onto the problem outside the fuel charger from the oil groove air extractor duct.
The utility model content
The utility model technical matters to be solved provides a kind of anti-return check valve, has solved fuel and has gathered too much in oil groove inside, causes fuel to be sprayed onto the problem outside the fuel charger from the oil groove air extractor duct.
In order to address the above problem; The utility model provides a kind of anti-return check valve; Should anti-return check valve be arranged in the triplate line of the fuel charger that connects the oil pump oil inlet near on the petrol storage tank lateral line; This triplate line is the pipeline of fuel charger oil inlet and oil groove oil return pipe intersection, comprises near the petrol storage tank lateral line, near oil pump lateral line and oil groove oil return pipe.
Further; Above-mentioned anti-return check valve also can comprise; Said anti-return check valve comprises: one-way valve seat and check valve spool, one-way valve seat are arranged on the oil pump oil inlet and are connected with the pump housing of oil pump, and the check valve spool is the column structure that passes one-way valve seat; This check valve spool comprises pressure adjustment unit, Flexible element and sealing unit; The pressure adjustment unit connects Flexible element, and Flexible element is connected with the outside of one-way valve seat, and the sealing unit shutoff connects the oil pump oil inlet end of one-way valve seat.
Further, above-mentioned anti-return check valve can comprise that also said anti-return check valve passes sealing unit, one-way valve seat, Flexible element and pressure adjustment unit by the adjustment screw rod to be formed, and the sealing unit shutoff connects the oil pump oil inlet end of one-way valve seat.
Further; Above-mentioned anti-return check valve also can comprise; Said sealing unit comprises adjustment spool, packing seal, pad and captive nut, and said adjustment spool is encapsulated in the cavity of one-way valve seat, and said packing seal shutoff connects the oil pump oil inlet end of one-way valve seat.
Compared with prior art, use the utility model, solved when oil pressure is too high; Fuel directly oppositely gets into oil groove from the oil pump inlet through oil return pipe; Cause being sprayed onto the problem outside the fuel charger, should increase the flow of oil groove by anti-return check valve simultaneously, solved fuel and gathered too much in oil groove inside to the oil pump oil return from the oil groove air extractor duct; Cause fuel to be sprayed onto the problem outside the fuel charger, improved the safety of fuel charger from the oil groove air extractor duct.
Description of drawings
Fig. 1 is the hydraulic efficiency pressure system scheme drawing of current fuel charger;
Fig. 2 is the hydraulic efficiency pressure system scheme drawing of the fuel charger of the utility model;
Fig. 3 is the anti-return check valve of the utility model when being in not opening, the structural representation of anti-return check valve;
Fig. 4 is the anti-return check valve of the utility model when being in opening, the structural representation of anti-return check valve.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the utility model is described further.
As shown in Figure 2, oil pump 4 is that liquid fuel is drawn into the executive device the fuel charger from petrol storage tank 1 through the anti-return check valve 3 that fuel charger enters the mouth.When oil pump 4 runnings, blade or gear pair produce vacuum, and fuel, is opened anti-return check valve 3 and entered into oil pump 4 through fuel charger oil inlet 2 from petrol storage tank 1.Fuel is through oil separator 5, and the fuel of oily does not get into FL/MTR through FL/MTR fuel feed pipe 6.The isolated gas-liquid mixture that contains a large amount of gases gets into oil groove 8 through oil groove fuel feed pipe 7.Oil gas gets into atmosphere through the air extractor duct 9 of oil groove.Under fuel in the compound deposited in oil groove, when the liquid fuel in the oil groove reached some, oil groove fuel-return valve 10 lifted, and fuel is got back in the oil pump 4 through oil groove oil return pipe 11 under the vacuum action that pump produces.
Anti-return check valve 3 cuts out under the effect of fuel charger internal oil pressure when oil pump 4 quits work; When oil pump 4 was started working, the fuel charger internal pressure reduced, and under the pressure effect of petrol storage tank fuel, anti-return check valve 3 is opened, and fuel gets in the oil pump 4.
Because fuel charger in-to-in level of fuel generally is higher than the liquid level of the fuel of petrol storage tank, cause pressure reduction simultaneously, this anti-return check valve 3 can cut out when oil pump 4 quits work, and prevents that fuel charger in-to-in fuel is back in the petrol storage tank.
When the liquid level in the petrol storage tank 1 was higher than oil pump 4, even oil pump 4 is not worked, the fuel pressure in the petrol storage tank 1 also was higher than the pressure in the fuel charger, and promptly when oil pressure differed seldom in petrol storage tank side oil pressure and the oil pump, fuel just can get in the oil pump 4.Even in some cases, settle petrol storage tank for ease, and petrol storage tank is arranged on higher position, ground, make the height of petrol storage tank 1 liquid level be higher than the height of air extractor duct 9 in the oil groove 8, fuel will overflow from air extractor duct 9, causes safety problem.Therefore when being higher than the entrance height of oil pump 4 when the liquid level in the petrol storage tank 1, the application need be provided with check valve in fuel charger, avoid the appearance of the problems referred to above.
Anti-return check valve is arranged in the fuel charger triplate line that connects the oil pump oil inlet near on the petrol storage tank lateral line among the application; This triplate line is the pipeline of fuel charger oil inlet and oil groove oil return pipe intersection, comprises near the petrol storage tank lateral line, near oil pump lateral line and oil groove oil return pipe.Can know from Fig. 2; Anti-return check valve can be installed near petrol storage tank lateral line place; Promptly be installed in the oil pump oil inlet; Can fuel in the petrol storage tank 1 be entered into fuel charger through oil pump 4, simultaneously should anti-return check valve can guarantee not and can fuel in the petrol storage tank 1 be got in the oil grooves 8 (the simple check valve that does not add the spring of adjustable force play a part to play prevent fuel from getting back to petrol storage tank from fuel charger) through oil groove oil return pipe 11.
Be provided with the fuel charger of anti-return check valve among the application, connect a petrol storage tank, comprise the anti-return check valve that is arranged on the oil pump oil inlet,, prevent that fuel is sprayed onto outside the fuel charger from the oil groove air extractor duct through controlling the response pressure of anti-return check valve.From on can find out if the petrol storage tank liquid level position is higher than oil pump entrance height; Then anti-return check valve can prevent that promptly petrol storage tank in-to-in fuel from oppositely getting into oil groove from the oil pump oil inlet through the oil groove oil return pipe; Further solve fuel and gather too much, cause fuel to be sprayed onto the problem outside the fuel charger from the oil groove air extractor duct in oil groove inside; Regulate the response pressure of anti-return check valve simultaneously, also can increase the degree of vacuum of oil pump, finally increased the flow of oil groove, further solve fuel and gather too much, cause fuel to be sprayed onto the problem outside the fuel charger from the oil groove air extractor duct in oil groove inside to the oil pump oil return.
Anti-return check valve among the application; Comprise: one-way valve seat and check valve spool, this one-way valve seat are arranged on the oil pump oil inlet and are connected with the pump housing of oil pump, and the check valve spool is the column structure that passes one-way valve seat; This check valve spool comprises pressure adjustment unit, Flexible element and sealing unit; The pressure adjustment unit connects Flexible element, and Flexible element is connected with the outside of one-way valve seat, and the sealing unit shutoff connects the oil pump oil inlet end of one-way valve seat.
Wherein the check valve spool mainly comprises: pressure adjustment unit, Flexible element and sealing unit;
Said pressure adjustment unit is through adjusting the compression degree of said Flexible element, to control the response pressure of anti-return check valve;
Said sealing unit is pressed on the one-way valve seat through Flexible element; When response pressure is not more than the response pressure of anti-return check valve; When promptly anti-return check valve was in closed condition, the oil pump oil inlet end of shutoff one-way valve seat made that fuel can not arrive in the oil pump in the petrol storage tank; Behind the response pressure of response pressure greater than anti-return check valve, break away from one-way valve seat, make that fuel arrives in the oil pump in the petrol storage tank.
Wherein, screw rod passes sealing unit to a side of said anti-return check valve successively and one-way valve seat is formed by adjusting; The opposite side of this anti-return check valve passes the pressure adjustment unit successively by the opposite side of adjusting screw rod and Flexible element is formed, and the sealing unit shutoff connects the oil pump oil inlet end of one-way valve seat.
Said sealing unit comprises adjustment spool, packing seal, pad and captive nut; One side of said anti-return check valve is passed one-way valve seat, adjustment spool, packing seal, pad and captive nut successively by the adjustment screw rod and is formed; The adjustment spool is encapsulated in the cavity of one-way valve seat, and said packing seal shutoff connects the oil pump oil inlet end of one-way valve seat.
The oily filter that enters the mouth of anti-return check valve and oil pump can be formed an independent assembly among the application.
It should be noted that: Flexible element can be elastomeric elements such as compression spring, spring only as an example, not as limit; Has elasticity as long as this elastomeric element is scalable; Can be employed Flexible element among the application, spring is a preferred implementation, and spring structure is simple; With low cost, the size of deformation control presssure that can be through spring.Certainly also can be used as the application's embodiment like structures such as elastic caoutchoucs; Pressure adjustment unit and Flexible element also can be merged into an electronic structure further; Realize the compression degree of pressure adjustment unit adjustment Flexible element; To control the response pressure of anti-return check valve, the application is not as limit.
The application's a application example is as shown in Figure 3, and anti-return check valve comprises one-way valve seat 12 and check valve spool.Wherein, Adjustment screw rod 16 passes a side of adjustment spool 13, packing seal 14, pad 15, captive nut 17 composition check valve spools successively; The check valve spool passes one-way valve seat 12, spring 19, adjustment nut 21 successively from the opposite side of adjustment screw rod 16, and packing seal 14 is pressed on the one-way valve seat 12 by spring 19.Be equipped with seal ring 18 on the one-way valve seat 12, to guarantee the leak tightness between anti-return check valve and the oil pump.Can be through changing the position of adjustment nut 21, the compression degree of adjustment spring 19, the response pressure of the anti-return check valve of control.
Further, can comprise filter screen on the said anti-return check valve, promptly filter screen 20 can link to each other with one-way valve seat 12 and form the anti-return check valve structure of band filter screen jointly.Wherein, filter screen 20 can adopt skeleton filter screen etc., filter screen can be housed on filter form the skeleton filter screen.Can be through filter screen with after fuel filter in the petrol storage tank, get into oil pump through anti-return check valve again, guarantee the cleaning of oil circuit, the cleanliness level of the fuel of guaranteeing finally to go out from fuel charger.Certainly as the case may be, anti-return check valve device also can not comprise filter screen.
The principle of work of anti-return check valve is following among the application: when the fuel in the oil groove reaches a certain amount of; The oil return pipe valve 10 of oil groove is opened; Fuel is the entering oil pump under the effect of the pull of vacuum of pump, and the check valve spool overcomes the pressure of oil pump entrance under the elastic force effect of oil pump internal pressure and spring 19; Packing seal 14 firmly is pressed on the one-way valve seat 12, has guaranteed the oil return of oil groove.As shown in Figure 3.Through regulating the position of adjustment nut 21, the elastic force of controlling spring 19, the closure of anti-return check valve when guaranteeing the oil groove oil return.
Generally, the caliber of fuel charger oil inlet is thicker, and the caliber of oil groove oil return pipe is thin, and (for example: the inlet caliber of fuel charger oil inlet is 40mm; The caliber of oil groove oil return pipe is 7.5mm); Feasible fuel flow from petrol storage tank entering oil pump has accounted for the overwhelming majority of oil pump total fuel flow amount, and because the caliber of oil groove oil return pipe is thinner, oil groove is less to the flow of oil pump oil return; The degree of vacuum that then need increase oil pump increases the flow of oil groove to the oil pump oil return; At the oil pump oil inlet anti-return check valve is set, owing to will overcome the spring force of anti-return check valve, the degree of vacuum that needs to increase oil pump just can reach; Promptly reached the purpose that increases the degree of vacuum of oil pump, finally increased the flow of oil groove to the oil pump oil return.
Under the very low situation of petrol storage tank liquid level; Be that distance is too small between petrol storage tank liquid level and the oil pump; Cause between fuel charger oil inlet and the oil pump pressure reduction too small; When this pressure reduction was not enough to overcome check valve spring 19 elastic force, spring 19 firmly was pressed in packing seal 14 on the one-way valve seat 12, closed the fuel charger oil inlet.Oil pump is for overcoming spring force to open anti-return check valve, and the degree of vacuum of pump strengthens, and then the pressure reduction between oil groove and the oil pump also strengthens thereupon, and oil groove 8 is able to accelerate to the speed of oil pump oil return.Can be according to the petrol storage tank height, adjustment nut 21, the anti-return check valve response pressure of control to obtain enough degree of vacuum, guarantees the oil return speed of oil groove, reduces the accumulation of oil groove fuel, avoids the generation of oil groove fuel injection event.
When the petrol storage tank liquid level is higher than the oil pump oil inlet even is higher than oil groove, because spring 19 has certain elastic force, can packing seal 14 firmly be pressed on the one-way valve seat 12, fuel just must overcome spring force as getting into fuel charger inside, could open check valve.Therefore as long as through adjustment nut 21, the elastic force of controlling spring 19 makes oily machine internal pressure and spring 19 pressure sums greater than the petrol storage tank fuel pressure, just can guarantee the closure of check valve, and then avoid the generation of oil groove event).
As shown in Figure 4, when fuel charger turned round, when the fuel quantity minimizing of oil groove oil return pipe, the degree of vacuum increasing was that the pump internal pressure reduces in the pump; Or after the oil groove oil return finished, oil groove oil return pipe valve 10 was closed, and pump housing internal pressure reduces.When pump internal pressure and spring 19 elastic force sums during less than oil pump oil inlet pressure, spool is to the oil pump medial movement, and packing seal 14 breaks away from one-way valve seats 12.Fuel gets into the pump housing from the slit between packing seal and the one-way valve seat inner, realizes that fuel enters into the function of fuel charger from petrol storage tank.
Because regulating the response pressure of anti-return check valve is key point; So the adjusting control to Flexible element is very important; Because this is related to the size of final increase oil groove to oil pump oil return flow, prevent that oil groove inside from gathering too much fuel and being sprayed onto outside the fuel charger from the oil groove air extractor duct.Therefore one butterfly button also can be set on the pressure adjustment unit of check valve spool; This butterfly button be shaped as butterfly-like shape; This shape is convenient to the compression degree of adjustment Flexible element is finely tuned; The adjustment of the deformability of Flexible element is can be controlled in below 100 microns at least, improved the degree of precision of anti-return check valve control response pressure, have good effect in actual use.In instantiation, the butterfly button can be arranged on the adjustment nut 21, and adjustment nut 21 is realized coarse regulation, and the butterfly button can be realized meticulous adjusting.
The above; Be merely the preferable specific embodiment of the utility model; But the protection domain of the utility model is not limited thereto; Anyly be familiar with this technological people in the technical scope that the utility model disclosed, the variation that can expect easily or replacement all should be encompassed within the protection domain of the utility model.Therefore, the protection domain of the utility model should be as the criterion with the protection domain of claim.
Claims (8)
1. anti-return check valve; It is characterized in that; Should anti-return check valve be arranged in the triplate line of the fuel charger that connects the oil pump oil inlet near on the petrol storage tank lateral line; This triplate line is the pipeline of fuel charger oil inlet and oil groove oil return pipe intersection, comprises near the petrol storage tank lateral line, near oil pump lateral line and oil groove oil return pipe.
2. anti-return check valve as claimed in claim 1; It is characterized in that; Said anti-return check valve comprises: one-way valve seat and check valve spool, one-way valve seat are arranged on the oil pump oil inlet and are connected with the pump housing of oil pump, and the check valve spool is the column structure that passes one-way valve seat; This check valve spool comprises pressure adjustment unit, Flexible element and sealing unit; The pressure adjustment unit connects Flexible element, and Flexible element is connected with the outside of one-way valve seat, and the sealing unit shutoff connects the oil pump oil inlet end of one-way valve seat.
3. anti-return check valve as claimed in claim 2; It is characterized in that; Said anti-return check valve passes sealing unit, one-way valve seat, Flexible element and pressure adjustment unit by the adjustment screw rod to be formed, and the sealing unit shutoff connects the oil pump oil inlet end of one-way valve seat.
4. anti-return check valve as claimed in claim 3; It is characterized in that; Said sealing unit comprises adjustment spool, packing seal, pad and captive nut, and said adjustment spool is encapsulated in the cavity of one-way valve seat, and said packing seal shutoff connects the oil pump oil inlet end of one-way valve seat.
5. anti-return check valve as claimed in claim 2 is characterized in that, also is equipped with seal ring on the said one-way valve seat.
6. anti-return check valve as claimed in claim 2 is characterized in that, said Flexible element is compression spring or elastic caoutchouc.
7. anti-return check valve as claimed in claim 2 is characterized in that, said pressure adjustment unit is an adjustment nut.
8. anti-return check valve as claimed in claim 2 is characterized in that, comprises filter screen on the said anti-return check valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120220388U CN202139038U (en) | 2011-06-27 | 2011-06-27 | Return oil preventing non-return valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120220388U CN202139038U (en) | 2011-06-27 | 2011-06-27 | Return oil preventing non-return valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202139038U true CN202139038U (en) | 2012-02-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120220388U Expired - Lifetime CN202139038U (en) | 2011-06-27 | 2011-06-27 | Return oil preventing non-return valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202139038U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927327A (en) * | 2011-08-13 | 2013-02-13 | 苏州敏喆机械有限公司 | High pressure liquid one-way valve |
| CN102943906A (en) * | 2012-11-21 | 2013-02-27 | 哈尔滨东安发动机（集团）有限公司 | Check valve device |
| CN109780291A (en) * | 2019-03-18 | 2019-05-21 | 张家港坦力机电设备有限公司 | Anti- siphon valve |
| CN114352415A (en) * | 2021-12-23 | 2022-04-15 | 中国航发哈尔滨东安发动机有限公司 | Structure suitable for air plug of preapring-proof aircraft engine lubricating oil system |
-
2011
- 2011-06-27 CN CN201120220388U patent/CN202139038U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927327A (en) * | 2011-08-13 | 2013-02-13 | 苏州敏喆机械有限公司 | High pressure liquid one-way valve |
| CN102943906A (en) * | 2012-11-21 | 2013-02-27 | 哈尔滨东安发动机（集团）有限公司 | Check valve device |
| CN109780291A (en) * | 2019-03-18 | 2019-05-21 | 张家港坦力机电设备有限公司 | Anti- siphon valve |
| CN114352415A (en) * | 2021-12-23 | 2022-04-15 | 中国航发哈尔滨东安发动机有限公司 | Structure suitable for air plug of preapring-proof aircraft engine lubricating oil system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 101299 Pinggu District, Beijing West Street, No. 15 Patentee after: Beijing Gilbarco Bunkeringfacilities Co., Ltd. Address before: 100016 Beijing City, Chaoyang District Jiuxianqiao Road No. 14 Building 12 layer 1201 C Patentee before: Beijing Gilbarco Bunkeringfacilities Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20120208 |
|
| CX01 | Expiry of patent term |