CN208793135U - A kind of empty device of the anti-stream of diesel engine fuel oil low pressure line - Google Patents

Abstract

The utility model discloses a kind of empty devices of the anti-stream of diesel engine fuel oil low pressure line, including the oil inlet pipe for connecting fuel tank with oil transfer pump, the oil inlet pipe input terminal is equipped with Fang Liukong mechanism, the Fang Liukong mechanism includes the cylinder for being plugged in the hollow structure of the oil inlet pipe orifice, the cylinder bore is equipped with annular convex platform, the cylinder bore is separated into entrance cavity and outlet plenum by the annular convex platform, spring is equipped in the outlet plenum, the sealing element that stops the locating part of the spring and the surface of revolution of the annular convex platform can be sealed is respectively provided at the both ends of the spring, the both ends of the spring is held out against respectively in the locating part and sealing element.It is empty, simple and practical, at low cost that the utility model can effectively prevent diesel engine fuel oil low pressure line stream.

Description

A kind of empty device of the anti-stream of diesel engine fuel oil low pressure line

Technical field

The utility model relates to engine oil technical fields, more specifically, it relates to a kind of diesel engine fuel oil low pressure The empty device of the anti-stream of pipeline.

Background technique

The fuel system of engine is an important factor for influencing its starting performance, as shown in Figure 1, fuel system is generally by oil Case A, oil inlet pipe B, diesel oil prefilter C, oil transfer pump D, diesel fine filter E, injection pump F, fuel injector G, oil return pipe H are constituted.Fuel oil It is a kind of most common failure of diesel engine that system, which enters air, it will cause diesel oil fuel feeding it is unsmooth or interrupt, Jin Eryin Play difficulty in starting, galloping；Especially spare Emergency diesel, downtime is especially long, once emergency require in use, Starting performance is required very high；Currently, solving fuel system to enter the main method of air failure to be by optimizing oil transfer pump Components later, integral arrangement design the low pressure line to improve startup performance of engine, before having ignored oil transfer pump to starting The influence of machine starting.

Most of generator of generation current unit industry is with low level fuel tank, and the fuel system low pressure oil of diesel engine Road largely uses plastic tube to connect, and with the extension of use time, oil pipe is easy aged deterioration and is hardened, especially oil pipe and connector Place is easy failure leakage, and most of filter can also accumulate air with the extension of use time, the diesel oil gravity in pipe Under potential energy effect, low pressure line diesel stream sky will cause, into air, cause engine start difficult, need before engine start It will be to extensive works such as low pressure oil way system evacuations.

The especially engine block of emergency since engine down time is long, and requires to start function when use Start at once, low pressure line can seriously affect engine one-shot success rate, cause unnecessary economy if there is air Loss.

Lack a kind of device that can effectively prevent diesel engine fuel oil low pressure line stream sky at present.

Utility model content

The technical problems to be solved in the utility model is the above-mentioned deficiency for the prior art, and the utility model provides one kind It can effectively prevent the empty dress of the anti-stream of empty, simple and practical, the at low cost diesel engine fuel oil low pressure line of diesel engine fuel oil low pressure line stream It sets.

Technical scheme of the utility model is as follows: a kind of empty device of the anti-stream of diesel engine fuel oil low pressure line, including will The oil inlet pipe that fuel tank is connected with oil transfer pump, the oil inlet pipe input terminal are equipped with Fang Liukong mechanism, the Fang Liukong mechanism packet The cylinder for being plugged in the hollow structure of the oil inlet pipe orifice is included, the cylinder bore is equipped with annular convex platform, the annular The cylinder bore is separated into entrance cavity and outlet plenum by boss, spring is equipped in the outlet plenum, the two of the spring The sealing element that end is respectively provided with the locating part for stopping the spring and can seal the surface of revolution of the annular convex platform, it is described Both ends of the spring held out against respectively in the locating part and sealing element.

As a further improvement, the sealing element include diameter be sequentially reduced from top to bottom the first multi-diameter shaft, Two multi-diameter shafts, correspondingly, be equipped in the sealing element diameter be sequentially reduced from top to bottom and with first multi-diameter shaft, second Corresponding first stepped hole of ladder shaft position, the second stepped hole.

Further, first multi-diameter shaft is slidably connected with the outlet cavity wall, second multi-diameter shaft Bottom be equipped with can by the surface of revolution of the annular convex platform seal sealing, the second ladder diameter of axle be equipped with upwards it is multiple with The logical via hole of the second stepped hole connection.

Further, step is equipped between first stepped hole, the second stepped hole, the spring one end is plugged in In first stepped hole and hold out against in the step.

Further, the locating part is the structure that upper end is small, lower end is big, is equipped in the outlet plenum and is socketed on institute The baffle ring for the locating part upper end periphery stated, the locating part bottom are equipped with the positioning column that more root cuttings are connected to the spring bores.

It further, is interference fit between the cylinder and the oil inlet pipe.

Further, the oil inlet pipe periphery is equipped with multiple hoops for clamping the oil inlet pipe and cylinder.

Further, the oil inlet pipe input terminal is additionally provided with strainer, and the strainer is close to the entrance cavity.

Beneficial effect

The utility model compared with prior art, has the advantage that are as follows:

1, by can effectively prevent diesel engine fuel oil low pressure line stream sky in oil inlet pipe input terminal setting Fang Liukong mechanism, Being emptied when engine start is prevented, difficulty in starting is effectively avoided, it is simple and practical, at low cost；

2, sealing element is held out against by annular convex platform by spring, reverse counterflow good seal performance by the first stepped hole and is determined Position column positions spring, can prevent spring from swinging, guarantee the sealing performance of sealing element；

3, setting strainer can effectively cross the impurity in oil strain, prevent the working performance of impurity effect Fang Liukong mechanism, protect Demonstrate,prove the empty effect of anti-stream.

Detailed description of the invention

Fig. 1 is prior art arrangement schematic diagram；

Fig. 2 is the structural schematic diagram of the utility model practical application；

Fig. 3 is the structural schematic diagram of the utility model Zhong Fangliukong mechanism；

Fig. 4 is the structural schematic diagram of sealing element in the utility model.

Wherein: 1- fuel tank, 2- oil transfer pump, 3- oil inlet pipe, 4- Fang Liukong mechanism, 5- cylinder, 6- annular convex platform, 7- entrance Chamber, 8- outlet plenum, 9- locating part, 10- spring, 11- sealing element, the first multi-diameter shaft of 12-, the second multi-diameter shaft of 13-, 14- sealing Portion, the first stepped hole of 15-, the second stepped hole of 16-, 17- via hole, 18- step, 19- strainer, 20- baffle ring, 21- positioning column.

Specific embodiment

Specific embodiment in reference to the accompanying drawing is described further the utility model.

Refering to fig. 1-4, the empty device of the anti-stream of a kind of diesel engine fuel oil low pressure line, including fuel tank 1 and oil transfer pump 2 are connected Oil inlet pipe 3, in the present embodiment, oil inlet pipe 3 is vertical arrangement, and oil inlet pipe 3 is plastics sebific duct, and 3 input terminal of oil inlet pipe is equipped with Fang Liukong mechanism 4, Fang Liukong mechanism 4 include the cylinder 5 for being plugged in the hollow structure of 3 inner hole of oil inlet pipe, and 5 inner cavity of cylinder is equipped with ring 5 inner cavity of cylinder is separated into entrance cavity 7 and outlet plenum 8, spring 10 is equipped in outlet plenum 8, in spring by shape boss 6, annular convex platform 6 The sealing element 11 that 10 both ends are respectively provided with the locating part 9 for stopping spring 10 and can seal the surface of revolution of annular convex platform 6, Both ends of the spring is held out against respectively in locating part 9 and sealing element 11, and sealing element 11 is held out against annular convex platform 6 by spring, and diesel oil can be with Forward flow, reverse counterflow good seal performance；The working principle of Fang Liukong mechanism 4: when oil transfer pump 2 works, oil transfer pump 2 Suction overcomes 11 gravity of 10 elastic force of spring and sealing element, and sealing element 11 is separated with annular convex platform 6, and diesel oil flows up；Work as oil transportation When pump 2 stops working, under 11 gravity of 10 elastic force of spring and sealing element, sealing element 11 is close to connection with annular convex platform 6, prevents The diesel oil of only diesel stream oil return box 1,11 top of sealing element can be such that sealing element 11 is further close to annular convex platform 6, improve anti- To adverse current sealing performance；Engine does not use for a long time, no matter the connector of oil transfer pump 2 and oil inlet pipe 3 whether gas leakage, pass through anti-stream The reversed leakproofness of empty mechanism 4 acts on to guarantee that oil inlet pipe 3 has been at the state of full diesel oil, prevents low pressure line diesel stream It loses, effectively air is prevented to enter oil inlet pipe 3, prevent being emptied when engine start, improve one after engine is shut down for a long time The success rate of secondary property starting, and the starting performance of engine can be promoted, the time required to shortening starting, in addition, the present apparatus is not necessarily to It is i.e. mountable to change original oil feed line, it is simple and practical, it is at low cost.

Sealing element 11 includes the first multi-diameter shaft 12, the second multi-diameter shaft 13 that diameter is sequentially reduced from top to bottom, correspondingly, close Diameter is equipped in sealing 11 to be sequentially reduced from top to bottom and the first rank corresponding with the first multi-diameter shaft 12,13 position of the second multi-diameter shaft Terraced hole 15, the second stepped hole 16, the first multi-diameter shaft 12 are slidably connected with 8 inner wall of outlet plenum, glide in guide seal 11 It is dynamic, guarantee the concentricity of sealing element 11 and cylinder 5, to guarantee sealing performance, 13 bottom of the second multi-diameter shaft is equipped with can will be annular Boss 6 the surface of revolution sealing sealing 14, the second multi-diameter shaft 13 radially be equipped with it is multiple connect with the second stepped hole 16 lead to Via hole 17, sealing 14 are cone structure, and sealing 14 has self-positioning effect when being inserted into the surface of revolution of annular convex platform 6, with ring The good airproof performance of shape boss 6, the route of diesel oil flowing are as follows: 17-the second stepped hole 16- of entrance cavity 7- annular convex platform 6- via hole the One stepped hole 15- outlet plenum 8.

Step 18 is equipped between first stepped hole 15, the second stepped hole 16,10 one end of spring is plugged in the first stepped hole 15 Interior and hold out against in step 18, locating part 9 is the structure that upper end is small, lower end is big, is equipped in outlet plenum 8 and is socketed on 9 upper end of locating part The baffle ring 20 of periphery, 8 inner wall of outlet plenum are equipped with the mounting groove for installing baffle ring 20, and 9 bottom of locating part is equipped with more root cuttings and is connected to The positioning column 21 of 10 inner hole of spring positions spring 10 by the first stepped hole 15 and positioning column 21, can prevent spring 10 swing, and guarantee the concentricity of spring 10 and cylinder 5, keep 10 elastic force direction of spring consistent with the axial line of cylinder 5, guarantee sealing The sealing performance of part 11.

It is interference fit between cylinder 5 and oil inlet pipe 3,3 periphery of oil inlet pipe is equipped with multiple be used for oil inlet pipe 3 and cylinder 5 The stability that cylinder 5 is connect with oil inlet pipe 3 can be improved in the hoop of clamping, guarantees the empty effect of anti-stream.

3 input terminal of oil inlet pipe is additionally provided with strainer 19, strainer 19 close to entrance cavity 7, can impurity effectively in filtered fuel, The working performance of impurity effect Fang Liukong mechanism 4 is prevented, guarantees the empty effect of anti-stream；For improvement effect, strainer 19 is set to oil inlet The port of 3 input terminal of pipe, the end face of cylinder 5 and strainer 19 are closely.

Above-described is only preferred embodiments of the present invention, it should be pointed out that is come for those skilled in the art It says, under the premise of not departing from the utility model structure, several modifications and improvements can also be made, these all will not influence this reality With the effect and patent practicability of novel implementation.

Claims (8)

1. a kind of empty device of the anti-stream of diesel engine fuel oil low pressure line, including the oil inlet pipe for connecting fuel tank (1) and oil transfer pump (2) (3), it is characterised in that: oil inlet pipe (3) input terminal is equipped with Fang Liukong mechanism (4), and the Fang Liukong mechanism (4) includes It is plugged in the cylinder (5) of the hollow structure of the oil inlet pipe (3) inner hole, the cylinder (5) inner cavity is equipped with annular convex platform (6), The cylinder (5) inner cavity is separated into entrance cavity (7) and outlet plenum (8), the outlet plenum (8) by the annular convex platform (6) It is interior be equipped with spring (10), the both ends of the spring (10) be respectively provided with stop the spring (10) locating part (9) and The sealing element (11) that the surface of revolution of the annular convex platform (6) can be sealed, the both ends of the spring are held out against respectively in the limit Position part (9) and sealing element (11).

2. the empty device of the anti-stream of a kind of diesel engine fuel oil low pressure line according to claim 1, it is characterised in that: described is close Sealing (11) includes the first multi-diameter shaft (12), the second multi-diameter shaft (13) that diameter is sequentially reduced from top to bottom, correspondingly, described Be equipped in sealing element (11) diameter be sequentially reduced from top to bottom and with first multi-diameter shaft (12), the second multi-diameter shaft (13) position Corresponding first stepped hole (15), the second stepped hole (16).

3. a kind of empty device of the anti-stream of diesel engine fuel oil low pressure line according to claim 2, it is characterised in that: described the One multi-diameter shaft (12) is slidably connected with described outlet plenum (8) inner wall, and the second multi-diameter shaft (13) bottom is equipped with can be by institute The sealing (14) of the surface of revolution sealing of annular convex platform (6) is stated, second multi-diameter shaft (13) is radially equipped with multiple and institute State the logical via hole (17) of the second stepped hole (16) connection.

4. a kind of empty device of the anti-stream of diesel engine fuel oil low pressure line according to claim 2, it is characterised in that: described the Step (18) are equipped between one stepped hole (15), the second stepped hole (16), the spring (10) one end is plugged in described first In stepped hole (15) and hold out against in the step (18).

5. the empty device of the anti-stream of a kind of diesel engine fuel oil low pressure line according to claim 1, it is characterised in that: the limit Position part (9) is the structure that upper end is small, lower end is big, is equipped with and is socketed on outside described locating part (9) upper end in the outlet plenum (8) The baffle ring (20) enclosed, the locating part (9) bottom are equipped with the positioning column (21) that more root cuttings are connected to the spring (10) inner hole.

6. the empty device of the anti-stream of a kind of diesel engine fuel oil low pressure line according to claim 1, it is characterised in that: the circle It is interference fit between cylinder (5) and the oil inlet pipe (3).

7. a kind of empty device of the anti-stream of diesel engine fuel oil low pressure line according to claim 1, it is characterised in that: it is described into Oil pipe (3) periphery is equipped with multiple hoops for clamping the oil inlet pipe (3) and cylinder (5).

8. a kind of empty device of the anti-stream of diesel engine fuel oil low pressure line, feature described in -7 any one exist according to claim 1 In: described oil inlet pipe (3) input terminal is additionally provided with strainer (19), and the strainer (19) is close to the entrance cavity (7).