CN101439840B - Fuel truck nozzle - Google Patents
Fuel truck nozzle Download PDFInfo
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- CN101439840B CN101439840B CN2008102204898A CN200810220489A CN101439840B CN 101439840 B CN101439840 B CN 101439840B CN 2008102204898 A CN2008102204898 A CN 2008102204898A CN 200810220489 A CN200810220489 A CN 200810220489A CN 101439840 B CN101439840 B CN 101439840B
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Abstract
The invention discloses a fuel oil filling gun, which is characterized in that a control valve consists of a main valve, a piston cylinder, a piston which is positioned in the piston cylinder and closely matched with the inner wall of the piston cylinder, and a spring both ends of which are pressed against the lower end surface of a gun body cover and the upper end surface of the piston respectively; the piston is provided with at least two through holes, and unidirectional plugs are arranged in the through holes; the unidirectional plugs comprise two unidirectional plugs with opposite flow directions; the piston cylinder is provided with a hole for a piston rod fixedly connected with the lower surface of the piston to pass through, and the piston rod is fixedly connected with the main valve; and the bottom end of the main valve is provided with a bottom hole which is pressed against the top end of a mandril connected with a control handle. The fuel oil filling gun improves the control valve, can perform stepless regulation on the water hammer pressure peak during the gun closing, and greatly reduce the water hammer.
Description
Technical field
The present invention relates to a kind of fuel truck nozzle, the nozzle that uses on particularly a kind of petrol service station fuel charger.
Background technology
In oiling machine hydraulic system,, be called water hammer owing to the acute variation of rate of flow of fluid in the pipeline causes the hydraulic impact phenomenon that a series of rapid pressure alternately go up and down.The generation of water hammer is because when flow stops suddenly; Because working fluid and movable parts action of inertia; Its kinergety becomes the high pressure wave that is begun by halt point, and it transmits along pipeline system with the speed that approaches the velocity of sound back and forth, makes the very high pressure of instantaneous appearance in the system.In normal operation; Oil pressure in the fuel charger is about 0.1～0.3MPa; But the fuel charger pump startup with stop, the nozzle turn-off transient, experimental result records the water hammer pressure peak value can reach 0.7MPa even higher, is 4～5 times of the normal oiler's delivered pressure of fuel charger.Such damage that impact caused damages considerably beyond distortion of materials that static pressure causes; And this impact is when nozzle turn-offs at every turn, all will produce; This just produces impact repeatedly to the fuel charger hydraulic unit, not only influences the stability and the functional reliability of hydraulic efficiency pressure system, also can cause phenomenons such as vibration and noise and attaching parts become flexible; Even pipe breakage, Hydraulic Elements and measuring device are damaged, in the dispenser system of big flow, can cause the more serious accident of consequence.
The nozzle that uses in present most of petrol service station generally all comprises oil inlet, rifle body, control cock, push rod, control handle, automatic control bar, vacuum valve, breather pipe, oil outlet; The rifle body is provided with a rifle body lid, and control cock is arranged on the below of rifle body lid, and then oil inlet.In oiling machine hydraulic system, nozzle essence is a shutoff valve.When pulling control handle, control cock is opened under the promotion of push rod; Pressure oil is through control cock, and pushes vacuum valve open, to the container oiling, and produces negative pressure at the vacuum valve place from oil outlet.Because this place is through breather pipe and oil outlet pipe mouth of pipe aperture and atmosphere, air replenishes through aperture.When fluid was filled it up with, the muzzle aperture was flooded by fluid, air can't mend into, form negative pressure, the automatic control bar is moved down, control cock is closed under spring promotes, stop control lever is accomplished self-styled process.The control cock closing velocity is fast more, and the water hammer peak pressure is big more.Can know that from the self-styled principle of nozzle the length of control cock shut depends on the stiffness coefficient of control cock push rod spring.Stiffness coefficient is big more, and the control cock closing velocity is fast more.
According to present research, the pressure changes delta p that the oil gun control cock is instantaneous when closing can use the approximate calculation of rogowski formula:
Wherein, ρ is a fluid density, l for the FL/MTR oil outlet to oil gun distance, v
0Be liquid mean flow rate in the pipeline, T
sBe the main valve shut.It is thus clear that the water hammer peak pressure can be taked following measure in the time of will reducing oil gun and close:
1, reduces the distance of FL/MTR oil outlet to nozzle;
2, in the middle of the pipeline of FL/MTR, add suitable buffering or pressure purger at oil gun;
3, reduce liquid mean flow rate in the pipeline;
4, prolong the oil gun control cock shut.
Therefore prolong time that the oil gun control cock closes and be the effective ways of water hammer peak pressure when reducing oil gun and closing.
Chinese patent 200620070564.3 discloses a kind of fuel truck nozzle with two-stage valve, and closing of this nozzle control cock is the promotion that relies on spring.In the pushing course of spring; The two-stage valve almost be non-resistance move down until closing; Therefore, this fuel truck nozzle with two-stage valve, the time that its main control valve is closed is compared with the shut of the main control valve of other one-level valves; The time that prolongs is also not obvious, and the effect of water hammer peak pressure is also very limited when closing reducing nozzle.
Summary of the invention
The object of the present invention is to provide the slower fuel truck nozzle of a kind of control cock closing velocity, the water hammer pressure that makes nozzle produce in the moment of closing significantly reduces.
For reaching above-mentioned purpose, the present invention adopts following technical scheme: a kind of fuel truck nozzle, comprise rifle body, rifle body lid, control handle and place oil inlet and oil outlet between control cock, control cock is located at the downside of rifle body lid in the rifle body; Be characterized in that said control cock is by forming with the spring that rifle body lid lower surface and piston upper surface offset respectively with close-fitting piston of piston cylinder inwall and two ends in main valve, piston cylinder and the piston cylinder; Said piston is provided with at least two through holes, is equipped with one-way plug one in the said through hole; Said one-way plug one comprises and flows to two kinds of opposite one-way plug one; The bottom of said piston cylinder is provided with the hole that the piston rod that supplies to captive joint with the piston lower surface passes, and said piston rod is captiveed joint with main valve; Said main valve bottom is provided with the bottom outlet that the top of the push rod that links to each other with control handle offsets.
In order to realize the present invention better, said piston is provided with four through holes.
One-way plug one on the above-mentioned piston in four through holes, wherein the inflow end of two one-way plug one is positioned at the upper surface of piston, and the inflow end of two one-way plug one is positioned at the lower surface of piston in addition.This is a preferred version.
The cooresponding through-hole aperture of one-way plug one that said inflow end is positioned at the piston upper surface is greater than flowing into the cooresponding through hole of one-way plug one that end is positioned at piston lower surface.This just makes main valve in the process of opening; (because of what this moment, fluid was washed open was to flow into the cooresponding through hole of one-way plug one that end is positioned at the piston upper surface to fluid, and promptly the bigger through hole in aperture holds the cooresponding through hole of one-way plug one that is positioned at piston lower surface under the pressure of fluid, to be sealed and flow into through the bigger through hole in aperture when piston moved up; And since fluid in the piston upper surface pressure greater than piston lower surface pressure; The big pressure of upper surface has further compressed the one-way plug one that sealed end is positioned at the piston upper surface, thereby increases sealing), comparatively fast flow to the space of piston lower surface from the space of piston upper surface; Just the oil liquid resistance that moves up of piston is less; Thereby make the rapid speed (being the rapid speed of main valve open) that main valve moves up, the oil pump capacity of nozzle can comparatively fast reach maximum flow, simultaneously because the aperture is relatively large; The power of opening handle that main valve is applied to can not increased owing to the cutoff port throttling of fluid too much, and the operator is easy to open; And in the process that main valve is closed; (because this moment, fluid was washed open is to flow into the cooresponding through hole of one-way plug one that end is positioned at piston lower surface to fluid when piston moves down of being arranged so that like this through the less through hole in aperture; It is the less through hole in aperture; Hold the cooresponding through hole of one-way plug one that is positioned at the piston upper surface under the pressure of fluid, to be sealed and flow into); Than the space of slug flow to the piston upper surface, the fluid throttle resistance that moves down of piston just is bigger, has slowed down the fluid flowing velocity from the space of piston lower surface; Thereby make main valve move down speed slow (promptly slowing down the speed that main valve is closed), the water hammer pressure that makes nozzle produce in the moment of closing significantly reduces.
More specifically, said through hole is meant that longitudinal cross-section one end is trapezoidal or falls trapezoidal through hole; Said one-way plug one is that bolt trapezoidal or trapezoidal, that match with the trapezoidal end of said through hole and spacing (adjusting) nut of being located at the non-trapezoidal end in said bolt longitudinal cross-section are formed by longitudinal cross-section one end; Gapped between the non-trapezoidal end of non-trapezoidal end in said bolt longitudinal cross-section and said through hole longitudinal cross-section, it is unobstructed to guarantee that like this fluid can flow.This is a kind of structure of one-way plug one, and the longitudinal cross-section is that a trapezoidal end is a sealed end, and the longitudinal cross-section is that a non-trapezoidal end is to flow into end, is located at the nut that flows into end and plays spacing effect, prevents that the bolt quilt from dashing from through hole.Corresponding to the shape of through hole, also can adopt other structure to form one-way plug one.
Be provided with the spring that is enclosed within on the said bolt between said spacing (adjusting) nut and the corresponding end face of said piston; This spring not only can play a spacing effect (preventing that particularly a non-trapezoidal end is positioned at the bolt tenesmus of piston upper surface) to bolt; Can also play sealing function to corresponding through hole; Therefore, through spacing (adjusting) nut unscrew, screwing changes the seal degree (promptly change unimpeded degree that fluid flow through through hole) of spring to through hole, just can change the oil flow size; Thereby up and down speed of change piston (just main valve close speed) changes water hammer peak pressure size.
Said rifle body lid lower surface is provided with the fixing convex on it of ammunition feed spring one end; Said rifle body lid and said piston cylinder are to be threaded; Be provided with the O RunddichtringO between said rifle body lid and the said piston cylinder.
Be provided with oil sealing between the hole that supplies piston rod to pass on the said piston cylinder; Said piston closely cooperates through placing " O " RunddichtringO and piston cylinder inwall in the groove on the piston.
Fuel truck nozzle of the present invention is work like this: pull control handle, control handle promotes push rod and moves up, and the bottom outlet that push rod offsets with it through the main valve bottom promotes main valve and moves up; In the process that moves up, main valve need overcome friction force and the resistance of space, piston upper surface fluid between piston and the piston cylinder, because the effect that is under pressure; The oil liquid pressure in space, piston upper surface is greater than the oil liquid pressure in piston lower surface space, and therefore, fluid is from flowing into the space of holding the cooresponding through hole of one-way plug one that is positioned at the piston upper surface to flow into piston lower surface gradually; Main valve moves on gradually, and in this process, pressure oil passes through control cock; And push vacuum valve open; To the container oiling, and produce negative pressure from oil outlet, because this place is through breather pipe and oil outlet pipe mouth of pipe aperture and atmosphere at the vacuum valve place; Air replenishes through aperture, and the fuel-displaced flow of nozzle increases until maximum with moving gradually on the main valve.When fluid was filled it up with, the air extractor vent of vacuum valve was flooded by fluid, air can't mend into, form negative pressure; The automatic control bar is moved down, and control handle lack of equilibrium, push rod no longer receive outer force urges upwards; Piston overcomes the friction force between piston and the piston cylinder under the promotion of spring, overcome the oil liquid resistance in piston lower surface space simultaneously; The promotion main valve moves down, because the effect that is under pressure, the oil liquid pressure in piston lower surface space is greater than the pressure of space, piston upper surface fluid; Therefore, fluid is from flowing into the space of holding the cooresponding through hole of one-way plug one that is positioned at piston lower surface to flow into the piston upper surface gradually, because the aperture of this through hole is less; Piston moves down the oil liquid resistance that receives and slowly reduces, and piston drives slow the moving of main valve downwards and closes fully until main valve, and nozzle stops to refuel.
Compared with prior art, the major advantage and the effect that have of the present invention is:
1, fuel truck nozzle of the present invention; Through the one-way plug one that through hole is set on piston and cooperates with it; And make and flow into through-hole aperture that end is positioned at the piston upper surface greater than flowing into the through hole that end is positioned at piston lower surface, this just makes main valve in the process of opening, fluid can comparatively fast flow to the space of piston lower surface; Thereby make the rapid speed (being the rapid speed of main valve open) that main valve moves up; Oil pump capacity can comparatively fast reach maximum flow, has reduced the dynamics of opening of operating personal, has reduced labour intensity; And in the process that main valve is closed; Fluid from the space of piston lower surface than the space of slug flow to the piston upper surface; Just the oil liquid resistance that moves down of piston reduces more slowly, thereby makes main valve move down speed slow (promptly slowing down the speed that main valve is closed), and such structure makes nozzle when shooting, can comparatively fast reach the maximum fill amount; And the time that main valve is closed can significant prolongation (this prolongation is time of closing relatively; Be moment in fact, almost imperceptible ten/several seconds levels), thereby the water hammer pressure that closes rifle moment generation is significantly reduced; Reduce the impact that when oil gun is closed the fuel charger hydraulic unit is produced, improved the stability and the functional reliability of oiling machine hydraulic system.
2, fuel truck nozzle of the present invention; Be bolt trapezoidal or trapezoidal, that cooperate with said through hole and the structure that spacing (adjusting) nut is formed be set by longitudinal cross-section one end through one-way plug one is designed at the non-trapezoidal end of bolt; And setting is enclosed within the spring on the bolt between setting nut and the corresponding end face of said piston; Just can unscrew through spacing (adjusting) nut, screwing changes the seal degree (promptly change unimpeded, throttle degree that fluid flow through through hole) of spring to through hole; Thereby change the oil flow size; Also just changed up and down speed of piston (just main valve close speed); Change the size of water hammer peak pressure, thereby realize closing the stepless adjustment of rifle moment water hammer pressure peak, until can with close rifle pressure be adjusted to the oil gun normal working under oil pressure identical (it is zero promptly closing rifle water hammer peak value this moment).The contriver has done the contrast experiment with nozzle of the present invention and existing common nozzle; Experimental result records, and under the identical situation of other condition, nozzle of the present invention is the manual and self-styled turn-off transient of nozzle at fuel charger; The water hammer pressure peak value is between 0～1/2 times of existing nozzle; And can be adjusted to any pressure peak, this just can make this nozzle go for different oil products, the oiling circumstance of different condition, and Applicable scope is wider.Need not professional tool during adjusting, only need the time of a few minutes, very convenient.
3, fuel truck nozzle of the present invention because its control cock is a fluid sealing system, is not influenced by nozzle institute gas filed oil, and the nuisance of well cuts does not produce big influence to its effect, and therefore stability is better.
4, fuel truck nozzle of the present invention is simple in structure, and is easy for installation, utilizing on the basis of existing fuel charger resource to greatest extent, greatly improved its service life and serviceability.
Description of drawings
Fig. 1 is the structural representation of the fuel truck nozzle of embodiment 1 employing;
Fig. 2 is the structural representation of control cock in the fuel truck nozzle shown in Figure 1;
Fig. 3 a is to be under the 40L/min condition at flow; Water hammer pressure peak value field test when existing nozzle closes rifle is figure as a result; Fig. 3 b is to be under the 40L/min condition at flow; Water hammer pressure peak value field test when the fuel truck nozzle that embodiment 1 adopts manually closes rifle is figure as a result, and Fig. 3 c is to be under the 40L/min condition at flow, and the water hammer pressure peak value field test the when fuel truck nozzle that embodiment 1 adopts closes rifle automatically is figure as a result;
Fig. 4 is the minimum water hammer pressure peak value of the fuel truck nozzle field test that adopts of embodiment 1 figure as a result.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is done detailed description further, but embodiment of the present invention is not limited to this.
Embodiment:
The structure of fuel truck nozzle of the present invention is as shown in Figure 1, is made up of oil inlet 1, rifle body 3, rifle body lid 2, control cock 4, push rod 5, control handle 6, automatic control bar 7, vacuum valve 8, breather pipe 9, oil outlet pipe 10.The structure of control cock 4 is as shown in Figure 2; It covers the spring 4.4 that 2 lower surfaces and piston 4.3 upper surfaces offset with the rifle body respectively by main valve 4.1, piston cylinder 4.2, piston 4.3 and two ends forms; Rifle body lid 2 and piston cylinder 4.2 to be being threaded, the rifle body cover 2 and piston cylinder 4.2 between be provided with O RunddichtringO 4.21.The rifle body covers 2 lower surfaces and is provided with the fixing convex on it of ammunition feed spring 4.4 1 ends; Help the fixed installation of spring 4.4 like this; Piston 4.3 circumferentially have an annular groove, piston 4.3 closely cooperates through " O " RunddichtringO in the annular groove 4.20 and piston cylinder 4.2 inwalls; It is that trapezoidal through hole 4.5,4.6 and longitudinal cross-section one end is down trapezoidal through hole 4.7,4.8 that piston 4.3 is provided with four longitudinal cross-section one ends, through hole 4.5 and 4.6,4.7 and 4.8 identical wherein, and the aperture of through hole 4.7 is less than the aperture of through hole 4.5; Through hole 4.5 longitudinal cross-sections are the lower surface that a trapezoidal end is positioned at piston 4.3, and through hole 4.7 longitudinal cross-sections are down that a trapezoidal end is positioned at the upper surface of piston 4.3; Through hole 4.5,4.6,4.7,4.8 on piston 4.3 and the piston 4.3 is installed with one heart; Being equipped with longitudinal cross-section one end in the through hole 4.5 is bolt 4.9 trapezoidal, that cooperate with through hole 4.5; The non-trapezoidal end in bolt 4.9 longitudinal cross-sections is equipped with setting nut 4.10; Between setting nut 4.10 and piston 4.3 upper surfaces spring 4.11 that is enclosed within on the bolt 4.9 is housed, gapped between the non-trapezoidal end of non-trapezoidal end in bolt 4.9 longitudinal cross-sections and through hole 4.5 longitudinal cross-sections; Same; Being equipped with longitudinal cross-section one end in the through hole 4.7 is bolt 4.12 trapezoidal, that cooperate with through hole 4.7; The non-trapezoidal end in bolt 4.12 longitudinal cross-sections is equipped with setting nut 4.13; Between setting nut 4.13 and piston 4.3 lower surfaces spring 4.14 that is enclosed within on the bolt 4.12 is housed, gapped between the non-trapezoidal end of non-trapezoidal end in bolt 4.12 longitudinal cross-sections and through hole 4.7 longitudinal cross-sections, this gap is less than the gap of bolt 4.9 than 4.5 of small end and through holes; Piston cylinder 4.2 bottoms are provided with the hole that the piston rod 4.15 that supplies to captive joint with piston 4.3 lower surfaces passes, and oil sealing 4.16 is housed in the hole, and piston rod 4.15 is captiveed joint with main valve 4.1; Main valve 4.1 is by gland 4.22, and packing seal 4.23 is formed with cone valve 4.24, and piston rod 4.15 bottoms and cone valve 4.24 are connected with engage thread, and packing seal 4.23 and gland 4.22 are pressed on the centre; Cone valve 4.24 bottoms are provided with the bottom outlet 4.19 that the top of the push rod 5 that links to each other with control handle 6 offsets; The design of main valve 4.1 is to adjust according to the structure of nozzle; Wherein packing seal 4.23 not only plays the leak free effect; Prevent leakage of oil, and, can also play the effect of a pressure buffer more because its material adopts rubber.
Fuel truck nozzle of the present invention is work like this: pull control handle 6, control handle 6 promotes push rod 5 and moves up, and the bottom outlet 4.19 that push rod 5 offsets with it through main valve 4.1 bottoms promotes main valve 4.1 and moves up; In the process that moves up, main valve 4.1 need overcome friction force and the resistance of space, piston 4.3 upper surface fluid between piston 4.3 and the piston cylinder 4.2, because the effect that is under pressure; The oil liquid pressure in space, piston 4.3 upper surface is greater than the oil liquid pressure in space, piston 4.3 lower surface, and therefore, fluid flows into the space of piston 4.3 lower surfaces gradually (what be opened this moment is through hole 4.5 and 4.6 from being extruded the through hole that is provided with bolt 4.9 4.5 on the piston of opening 4.3; What seen among the figure is 4.5), main valve 4.1 moves on gradually, in this process; Pressure oil is through control cock 4; And push vacuum valve 8 open, to the container oiling, and produce negative pressure at vacuum valve 8 places from oil outlet 10; Because this place is through breather pipe 9 and oil outlet pipe 10 mouth of pipe aperture and atmosphere; Air replenishes through aperture, and the fuel-displaced flow of nozzle increases until maximum with moving on the main valve 4.1 gradually, externally refuels.When fluid was filled it up with, breather pipe 9 was flooded by fluid, air can't mend into; Form negative pressure, automatic control bar 7 is moved down, control handle 6 lack of equilibrium; Push rod 5 no longer receives outer force urges upwards, and piston 4.3 overcomes the friction force between piston 4.3 and the piston cylinder 4.2 under the promotion of spring 4.4; The oil liquid resistance that overcomes space, piston 4.3 lower surface simultaneously promotes main valve 4.1 and moves down, owing to receive the effect of power, the oil liquid pressure in space, piston 4.3 lower surface is greater than the pressure of space, piston 4.3 upper surface fluid; Therefore; The space (what be opened this moment is through hole 4.7 and 4.8, and what seen among the figure is 4.7) that fluid flows into piston 4.3 upper surfaces gradually from being extruded the through hole that is provided with bolt 4.12 4.7 on the piston of opening 4.3, piston 4.3 moves down the oil liquid resistance that receives and slowly reduces; Piston 4.3 drives slow the moving of main valve 4.1 downwards and closes fully until main valve 4.1, and nozzle stops to refuel.
At flow is under the 40L/min condition; Water hammer pressure peak value field test when existing nozzle closes rifle as a result figure shown in Fig. 3 a; Water hammer pressure peak value field test when fuel truck nozzle of the present invention manually closes rifle as a result figure shown in Fig. 3 b; Water hammer pressure peak value field test when fuel truck nozzle of the present invention closes rifle automatically as a result figure shown in Fig. 3 c; It is thus clear that the existing nozzle water hammer pressure of water hammer pressure peakedness ratio peak value significantly reduced when fuel truck nozzle of the present invention closed rifle, so the working stability of system and performance reliability are better.
Fuel truck nozzle of the present invention; Can through unscrew or the through hole 4.7 (or 4.8) of screwing in bolt 4.12 on setting nut 4.13; Change the seal degree (changing the unimpeded degree of fluid) of 4.14 pairs of through holes 4.7 of spring through through hole 4.7; Realize adjustment, thereby realize closing the adjustment of rifle moment water hammer pressure peak to the main valve shut.Because nut 4.13 can step-less adjustment, so this structure also is stepless to the adjustment of closing rifle moment water hammer pressure peak.The field test result of the accessible minimum water hammer pressure peak value of fuel truck nozzle of the present invention is as shown in Figure 4; Can see that from Fig. 4 closing rifle moment water hammer pressure peak is merely 0.18～0.19MPa; Compare with the oil pressure 0.1～0.3MPa under the oil gun normal working; Basic identical, promptly closing rifle water hammer peak value this moment is zero.
Control cock in the fuel truck nozzle of the present invention; Only need the shape of main valve is done some variations; Just can be applied on the nozzle of other type; Reach remarkable reduction and close the effect of the water hammer pressure of rifle moment generation, to the impact of fuel charger hydraulic unit generation, improved the stability and the functional reliability of oiling machine hydraulic system when the minimizing oil gun is closed.
The foregoing description is a preferred implementation of the present invention; But embodiment of the present invention is not restricted to the described embodiments; For example offer at least two through holes on the piston and do not use one-way plug one, perhaps adopt one-way plug one of other shape or the like, other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; All should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (7)
1. fuel truck nozzle, comprise rifle body, rifle body lid, control handle and place oil inlet and oil outlet between control cock, control cock is located at the downside of rifle body lid in the rifle body; It is characterized in that said control cock is by forming with the spring that rifle body lid lower surface and piston upper surface offset respectively with close-fitting piston of piston cylinder inwall and two ends in main valve, piston cylinder and the piston cylinder; Said piston is provided with at least two through holes, is equipped with one-way plug one in the said through hole; Said one-way plug one comprises and flows to two kinds of opposite one-way plug one, flows into the cooresponding through-hole aperture of one-way plug one that end is positioned at the piston upper surface greater than flowing into the cooresponding through hole of one-way plug one that end is positioned at piston lower surface; The bottom of said piston cylinder is provided with the hole that the piston rod that supplies to captive joint with piston lower surface passes; Said piston rod is captiveed joint with main valve; Said main valve bottom is provided with the bottom outlet that the top of the push rod that links to each other with control handle offsets.
2. according to the said fuel truck nozzle of claim 1, it is characterized in that said piston is provided with four through holes.
3. according to the said fuel truck nozzle of claim 2, it is characterized in that, the one-way plug one on the said piston in four through holes, wherein the inflow end of two one-way plug one is positioned at the upper surface of piston, and the inflow end of two one-way plug one is positioned at the lower surface of piston in addition.
4. according to each said fuel truck nozzle in the claim 1 to 3, it is characterized in that said through hole is meant that longitudinal cross-section one end is trapezoidal or falls trapezoidal through hole; Said one-way plug one is that bolt trapezoidal or trapezoidal, that match with the trapezoidal end of said through hole and the stop nut of being located at the non-trapezoidal end in said bolt longitudinal cross-section are formed by longitudinal cross-section one end; Gapped between the non-trapezoidal end of non-trapezoidal end in said bolt longitudinal cross-section and said through hole longitudinal cross-section.
5. according to the said fuel truck nozzle of claim 4, it is characterized in that, be provided with the spring that is enclosed within on the said bolt between said stop nut and the corresponding end face of said piston.
6. according to the said fuel truck nozzle of claim 1, it is characterized in that said rifle body lid lower surface is provided with the fixing convex on it of ammunition feed spring one end; Said rifle body lid and said piston cylinder are to be threaded; Be provided with the O RunddichtringO between said rifle body lid and the said piston cylinder.
7. according to the said fuel truck nozzle of claim 1, it is characterized in that, be provided with oil sealing between the hole that supplies piston rod to pass on the said piston cylinder; Said piston closely cooperates through placing " O " RunddichtringO and piston cylinder inwall in the groove on the piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102204898A CN101439840B (en) | 2008-12-26 | 2008-12-26 | Fuel truck nozzle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102204898A CN101439840B (en) | 2008-12-26 | 2008-12-26 | Fuel truck nozzle |
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| Publication Number | Publication Date |
|---|---|
| CN101439840A CN101439840A (en) | 2009-05-27 |
| CN101439840B true CN101439840B (en) | 2012-11-21 |
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| CN2008102204898A Active CN101439840B (en) | 2008-12-26 | 2008-12-26 | Fuel truck nozzle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106122474B (en) * | 2016-08-18 | 2019-02-05 | 托肯恒山科技（广州）有限公司 | A kind of leakage-resistant device for fuel charger confined space |
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| CN2315110Y (en) * | 1997-11-23 | 1999-04-21 | 永嘉县江北军民机械厂 | Self-closing oil feeder |
| CN2892826Y (en) * | 2006-03-20 | 2007-04-25 | 优必得石油设备(苏州)有限公司 | Fuel filling gun |
| CN101298312A (en) * | 2008-06-10 | 2008-11-05 | 托肯恒山科技（广州）有限公司 | Fuel truck nozzle |
| CN201358169Y (en) * | 2008-12-26 | 2009-12-09 | 托肯恒山科技（广州）有限公司 | Fuel truck nozzle |
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| CN101439840A (en) | 2009-05-27 |
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