CN209026221U

CN209026221U - Pilot-operated type stop valve

Info

Publication number: CN209026221U
Application number: CN201821951581.7U
Authority: CN
Inventors: 袁海环; 杜芳静; 李波
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-11-23
Filing date: 2018-11-23
Publication date: 2019-06-25
Anticipated expiration: 2028-11-23

Abstract

The utility model discloses a kind of pilot-operated type stop valves, including shell, the rear and front end of shell is respectively equipped with fuel filler and fuel outlet, there is the interior hub being arranged along its length in shell, have in the interior hub and builds pressure storehouse, shell, which is equipped with, builds the impulse mouth that pressure storehouse is connected to this, builds the open at one end of pressure storehouse face fuel filler, and be configured with the piston adaptable with it；Piston is elastically supported on interior hub, and can be slided along shell length direction, has closing and open position in its sliding stroke, when its is in the closed position, fuel filler and fuel outlet disconnect, and when piston is in an open position, fuel filler and fuel outlet are interconnected.By introduction-type pressure balancing piston position, opening or closing for fuel filler is realized, and can directly utilize the pressurized fuel of oiling pipeline, stop valve reaction speed is improved, while simplifying impulse structure, overall structure is simple, reduce cost, and manufacture easy to produce and later period maintenance maintenance.

Description

Pilot-operated type stop valve

Technical field

The utility model relates to fluid loading technique fields, and in particular to a kind of pilot-operated type stop valve.

Background technique

Power-equipment during the work time as needed would generally irregular fuel up or water or other fluid, filling process In then rely primarily on stop valve carry out fluid truncation stop infusing, for aircraft refuelling system, quickly cut off fuel oil Entrance guarantees that oil mass is accurate, and filling conduit cleaning, stop valve plays a crucial role wherein, existing aircraft refuelling system Stop valve design structure in system is complicated, and production cost is high, and is not easy to later maintenance.

Utility model content

To solve the above problems, the utility model provides a kind of pilot-operated type stop valve, simplify overall structure, reduces manufacture Cost is convenient for later period maintenance.

To achieve the above object, technical solutions of the utility model are as follows:

A kind of pilot-operated type stop valve, key are: including shell, the rear and front end of the shell is respectively equipped with fuel oil and enters Mouthful and fuel outlet, there is in shell the interior hub being arranged along its length, have in the interior hub and build pressure storehouse, shell be equipped with This builds the impulse mouth of pressure storehouse connection, the open at one end for building pressure storehouse face fuel filler, and is configured with the work adaptable with it Plug；

The piston is elastically supported on interior hub, and can be slided along shell length direction, is had in its sliding stroke Closing and open position, when its is in the closed position, fuel filler and fuel outlet are disconnected, when piston is in an open position When, the fuel filler and fuel outlet are interconnected.

Using above scheme, external fluid introducing is built in pressure storehouse by impulse mouth, changes piston pressure at both sides whereby Size, to control the position of piston, to realize opening or closing for fuel filler, reaction speed is fast, and structure is simple, is convenient for Manufacture.

As preferred: the piston has the closure part being adapted with its internal diameter close to one end of fuel filler, close to combustion One end of oil export has the be slidably matched portion adaptable with pressure storehouse is built, and forms foreground between the closure part and the portion that is slidably matched Rank, the fuel filler have the catching step being adapted with the front step close to one end of piston, close when piston is in When position, front step is abutted with catching step；

There is radially inwardly projecting stopper section in the interior hub, the stopper section is located at the front of impulse mouth, when When piston is in an open position, the portion end that is slidably matched is abutted with stopper section.

Using above scheme, it can be ensured that the stability of former and later two extreme positions of piston passes through the catching step and backstop Portion limits piston, is more advantageous to the reliability for improving valve.

As preferred: described build in pressure storehouse has the positioning pin being arranged along its length, and the rear end of the interior hub is equipped with Blind hole afterwards, the fuel filler is interior to have pillar, and the position of blind hole is equipped with preceding blind hole after face on the pillar, the positioning pin Both ends are respectively embedded into preceding blind hole and rear blind hole, and can be slid back and forth between, and the piston is solidly set on the positioning pin. Using the above structure, piston is installed by positioning pin, and it is moveable by the skidding distance of positioning pin to limit piston herein Distance, to further increase the reliability of stop valve.

As preferred: be arranged with reset spring on the positioning pin, the both ends of the reset spring respectively with piston and interior hub Rear end abut.Using above scheme, piston can be made fuel filler can be added to block in the initial state by reset spring, kept away Exempt from residual oil outflow pollution environment in oil filling pipe.

As preferred: the interior cylindrical structure in hub front end, the tapered structure in rear end.Using above scheme, be conducive to The pressure at fuel outlet end is reduced, the high pressure of arrival end fuel oil is kept, stop valve is avoided to influence filling speed.

As preferred: the internal diameter built pressure storehouse front inner diameter and be greater than fuel filler.Using above scheme, impulse mouth can be straight It connects and introduces fuel oil out of fuel filler upstream oiling pipeline, building the pressure built-in pressure in storehouse, and because piston is towards the area for building pressure storehouse Greater than the sectional area of fuel filler, so that pressure is greater than front side pressure on rear side of piston, living under differential pressure action Plug is mobile towards fuel filler and is blocked, to realize the quick cutting of fuel oil, and does not have to introduce external pressure source.

As preferred: the shell includes the procapsid and back casing being bolted, the procapsid and back casing Connecting end surface is equipped with sealing ring A.Using split type shell structure, convenient for individually producing manufacture, reduces mold and form difficulty, together When both ensure the leakproofness of connecting portion by sealing ring A, prevent fuel leakage.

As preferred: it is described be slidably matched portion and build pressure storehouse side wall between be equipped at least one sealing ring B.It uses with top Case, it is ensured that build the leakproofness in pressure storehouse, it is ensured that the pressure of piston front and rear sides is not connected to, and piston can be realized by pressure difference and be moved, Improve the reliability of this stop valve.

Compared with prior art, the utility model has the beneficial effects that

Fuel oil is realized by introduction-type pressure balancing piston position using pilot-operated type stop valve provided by the utility model Entrance opens or closes, and can directly utilize the pressurized fuel of oiling pipeline, improves stop valve reaction speed, simplifies simultaneously Impulse structure, overall structure is simple, reduces cost, and manufacture easy to produce and later period maintenance maintenance.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is sectional view at A-A in Fig. 1；

Fig. 3 is the use state diagram of the utility model.

Specific embodiment

The utility model is described in further detail with attached drawing with reference to embodiments.

Pilot-operated type stop valve shown in referring to figs. 1 to Fig. 3 mainly includes shell 1 in hollow structure, the front and back of shell 1 Both ends are respectively equipped with its internal fuel filler 10 being connected to and fuel outlet 11 (with the position of fuel oil entrance in the application Before, the position that fuel oil is gone out is rear), also interior hub 2 in hollow structure, the outer wall of interior hub 2 are provided along its length in shell 1 There are gap between the inner wall of shell 1, which constitutes the runner of fuel oil, and face fuel oil enters respectively for the rear and front end of interior hub 2 Mouth 10 and fuel outlet 11, and its front end (i.e. one end of face fuel filler 10) is open, open end is movably set with piston 3, The inner space of the piston 3 and interior hub 2, which is surrounded to be formed, builds pressure storehouse 20.

Shell 1 be equipped with impulse mouth 12, impulse mouth 12 directly with build pressure storehouse 20 be connected to, by impulse mouth 12 towards build press storehouse 20 introduce fluid, when changing 3 front and rear sides pressure of piston, then piston 3 can be made along the length direction sliding for building pressure storehouse 20, at it Have in sliding stroke and opens and closes two positions, when piston 3 is in an open position, fuel filler 10 and fuel outlet 11 It being interconnected, fuel oil can be filled by runner, and when piston 3 is in the closed position, piston 3 blocks up fuel filler 10 Firmly, fuel filler 10 and fuel outlet 11 disconnect, then realize the cutting of fuel oil runner.

For manufacture easy to produce, the shell 1 in the application is adopted a split structure comprising procapsid 1a and back casing 1b is connected between procapsid 1a and back casing 1b using symmetrically arranged four fastened by screw, while to ensure connecting end surface Sealing performance, therefore sealing ring A15 is correspondingly provided in connecting end surface.

And interior hub 2 is then fixedly supported in back casing 1b by equally distributed three connection sheets 24, the front end of interior hub 2 In hollow columnar structures, and the tapered structure in rear end, and along being gradually become smaller from its internal diameter of the direction after, concentric back casing The internal diameter of the rear end 1b also gradually becomes smaller along direction from front to back, the fuel oil that 2 rear end of hub interior in this way and the rear end back casing 1b are formed The sectional area of runner is in the trend being gradually increased, and is conducive to fuel oil and quickly flows out from fuel outlet 11.

Interior hub 2 is coaxially disposed with fuel filler 10 and fuel outlet 11, and building in pressure storehouse 20 has what is be coaxially arranged to determine Position pin 4 has radially raised pillar at fuel filler 10 as shown, the rear inside of interior hub 2 is equipped with rear blind hole 22 13, the position of blind hole 22 is equipped with preceding blind hole 14 after face on pillar 13,14 He of blind hole before the rear and front end of positioning pin 4 is respectively embedded into Afterwards in blind hole 22, piston 3 is solidly set on positioning pin 4, and the length between 22 hole bottom wall of preceding blind hole 14 and rear blind hole is greater than positioning The length of pin 4, length difference between the two are the slidable stroke length of piston 3.

At the same time, also it is arranged with reset spring 5 on positioning pin 4, the both ends of reset spring 5 rear end with interior hub 2 respectively It abutting with piston 3, when initial, under the action of reset spring 5, piston 3 is i.e. in the closed position, fuel filler 10 is blocked, And when having fuel oil with pressure injection at fuel filler 10, then after needing to overcome the elastic force of reset spring 5 to act on first, then by piston 3 The rear end of hub 2 pushes inwardly, so that fuel filler 10 be made to be connected to fuel outlet 11.

For the reliability for further increasing this pilot-operated type stop valve, therefore the structure of self structure and interior hub 2 to piston 3, And the structure of procapsid 1a makes a change, and flexibility and reliability is opened and closed to improve piston 3, as shown, before piston 3 End is closure part 30 in a circular table shape, and size and the size of fuel filler 10 are adapted, and its rear end is sliding annular in shape Auxiliary section 31, and the outer diameter in the portion 31 that is slidably matched is greater than the outer diameter of closure part 30, height difference between the two constitutes rectangular shape Front step 32, and the rear end of fuel filler 10 has the catching step 100 being adapted with front step 32, in this way when piston 3 is towards combustion When oil-in 10 is slided, closure part 30 can be protruded into fuel filler 10 and block to it, while pass through front step 32 and backstop Step 100 mutually abuts, and the limit of front end sliding stroke can be carried out to piston 3.

The interior position by front end of interior hub 2 has radially inwardly protruded stopper section 21, and stopper section 21 is located at The front of impulse mouth 12, protrusion is located on sliding path when piston 3 slides backwards, when piston 3 slides backwards, The then blocking by stopper section 21 of rear end stroke, and in this way, the sliding of piston 3 will not be to the normal work of impulse mouth 12 It causes to interfere, it is ensured that potential source can be normally introduced, so that piston 3 be enable to work normally.

It is slidably matched portion 31 and the inner wall of interior hub 2 is slidably matched, and the leakproofness both to guarantee sliding surface, therefore in the two Between be equipped at least one sealing ring B23.

In the present embodiment, it is contemplated that the pressurized fuel of directly reference 10 upstream of fuel filler of impulse mouth 12 makes as pressure source With, therefore the internal diameter in the portion 31 that is slidably matched is greater than the internal diameter at fuel filler 10, after being arranged in this way, introduces pressure when building in pressure storehouse 20 When power fuel oil, the pressure area of 3 rear side of piston is greater than the pressure area of front side, so that piston 3 is mobile forward, closure part 30 Fuel filler 10 can then be blocked, i.e. realization fuel-cut.

Referring to figs. 1 to Fig. 3, in use, fuel filler 10 is connected with the petroleum pipeline 6 of upstream, under original state, piston 3 exists It is in the closed position under the action of reset spring 5, fuel filler 10 is blocked completely, prevents 6 residual oil liquid stream of oil pipeline from going out, When oiling, fuel outlet 11 is then connect with fuel tank, 6 input pressure fuel oil of petroleum pipeline, under pressurized fuel effect, reset spring 5 By continued compression, 3 rearward end of piston slides into abut with stopper section 21, in an open position, fuel filler 10 and fuel outlet 11 connections, can normally be refueled.

Establishing between impulse mouth 12 and petroleum pipeline 6 has impulse pipeline 7, and is correspondingly provided with control switch, similar solenoid valve Etc. structures, after the instruction that cutting is refueled is filled it up with or received to fuel tank, impulse mouth 12 is then introduced directly by impulse pipeline 7 The pressurized fuel of trip, pressurized fuel are building the pressure built-in pressure in storehouse 20 rapidly, because the pressure area of 3 rear side of piston is greater than fuel filler 10 area, piston 3 overcomes fuel filler 10 to be under hydraulic and reset spring 5 the collective effect built in pressure storehouse 20 at this time Pressure, be quickly moved to closed position, achieve the purpose that quickly cut off refuel.

Finally, it should be noted that foregoing description is only the preferred embodiment of the utility model, the ordinary skill of this field Personnel are under the enlightenment of the utility model, under the premise of without prejudice to the utility model aims and claim, can make more Kind is similar to be indicated, such transformation is each fallen within the protection scope of the utility model.

Claims

1. a kind of pilot-operated type stop valve, it is characterised in that: including shell (1), the rear and front end of the shell (1) is respectively equipped with combustion Oil-in (10) and fuel outlet (11), shell (1) is interior to have the interior hub (2) being arranged along its length, tool in the interior hub (2) Pressure storehouse (20) is built, shell (1), which is equipped with, builds the impulse mouth (12) that pressure storehouse (20) is connected to this, described to build pressure storehouse (20) face combustion The open at one end of oil-in (10), and it is configured with the piston (3) adaptable with it；

The piston (3) is elastically supported on interior hub (2), and can slide along shell (1) length direction, in its sliding stroke With closing and open position, when its is in the closed position, fuel filler (10) and fuel outlet (11) are disconnected, and work as piston (3) when in an open position, the fuel filler (10) and fuel outlet (11) are interconnected.

2. pilot-operated type stop valve according to claim 1, it is characterised in that: the piston (3) is close to fuel filler (10) One end have with its internal diameter be adapted closure part (30), close to fuel outlet (11) one end have and build pressure storehouse (20) phase The portion that is slidably matched (31) adapted to forms front step (32) between the closure part (30) and the portion that is slidably matched (31), the combustion Oil-in (10) has the catching step (100) being adapted with the front step (32) close to the one end of piston (3), works as piston (3) when in the closed position, front step (32) is abutted with catching step (100)；

There is radially inwardly projecting stopper section (21), the stopper section (21) is located at impulse mouth in the interior hub (2) (12) front, when piston (3) is in an open position, the portion that is slidably matched (31) end is abutted with stopper section (21).

3. pilot-operated type stop valve according to claim 1, it is characterised in that: described build in pressure storehouse (20) has along its length The rear end of the positioning pin (4) of direction setting, the interior hub (2) is equipped with rear blind hole (22), has in the fuel filler (10) convex Column (13), the position of blind hole (22) is equipped with preceding blind hole (14) after face on the pillar (13), and the both ends of the positioning pin (4) are distinguished It is embedded in preceding blind hole (14) and rear blind hole (22), and can slide back and forth between, the piston (3) is solidly set on the positioning pin (4) on.

4. pilot-operated type stop valve according to claim 3, it is characterised in that: be arranged with reset bullet on the positioning pin (4) Spring (5), the both ends of the reset spring (5) are abutted with the rear end of piston (3) and interior hub (2) respectively.

5. pilot-operated type stop valve as claimed in any of claims 1 to 4, it is characterised in that: interior hub (2) front end Cylindrical structure, the tapered structure in rear end.

6. pilot-operated type stop valve according to claim 5, it is characterised in that: pressure storehouse (20) front inner diameter of building is greater than combustion The internal diameter of oil-in (10).

7. pilot-operated type stop valve according to claim 2, it is characterised in that: the shell (1) includes being bolted Procapsid (1a) and back casing (1b), the procapsid (1a) and back casing (1b) connecting end surface are equipped with sealing ring A (15).

8. pilot-operated type stop valve according to claim 6, it is characterised in that: the portion that is slidably matched (31) and build pressure storehouse (20) at least one sealing ring B (23) is equipped between side wall.