CN209990581U

CN209990581U - Durable fuel oil injector

Info

Publication number: CN209990581U
Application number: CN201920357962.0U
Authority: CN
Inventors: 武志旺
Original assignee: Wuxi Weixin Precision Machinery Co Ltd
Current assignee: Wuxi Weixin Precision Machinery Co Ltd
Priority date: 2019-03-20
Filing date: 2019-03-20
Publication date: 2020-01-24
Anticipated expiration: 2029-03-20

Abstract

The utility model discloses a durable fuel oil injector, one side of the main body is provided with an oil inlet pipe joint, the top end of the main body is provided with an upper shell, the bottom end of the main body is provided with a screw sleeve, the bottom end of the screw sleeve is provided with an oil nozzle, the inside of the main body is provided with an oil duct and a mandril passage, one end of the oil duct is communicated with the oil inlet pipe joint, the other end of the oil duct is communicated with a cavity inside the screw sleeve, a needle valve is movably arranged in the cavity inside the screw sleeve, the bottom of the needle valve is movably arranged in the oil nozzle, the top end of the mandril is connected with a top plate, the top plate is movably arranged in the upper shell, a spring and a pressure regulating screw are arranged in the upper shell, the bottom end of the spring is connected with the upper surface of the top plate, the impact of the needle valve on the oil injection hole does not exist, so that the service life of the oil injector is ensured.

Description

Durable fuel oil injector

Technical Field

The utility model relates to a sprayer technical field specifically is a durable fuel injector.

Background

The oil injector is a precision device with very high processing precision, and is required to have a large dynamic flow range, strong anti-blocking and anti-pollution capacity and good atomization performance. The fuel injector receives the fuel injection pulse signal sent by the ECU and accurately controls the fuel injection quantity.

The spray characteristics of the fuel injector include atomized particle size, oil mist distribution, oil beam direction, range and diffusion cone angle, which are in accordance with the requirements of the combustion system of the diesel engine, so that the mixed gas is formed and combusted perfectly, and higher power and thermal efficiency are obtained.

At present sprayer fuel sprayer oil spout department, the nozzle opening is stopped up with the needle valve tip, is a contact valve body, and after long-time the use, the nozzle opening is worn and torn very easily, leads to oil leak, pressure abnormity scheduling problem to appear, consequently, awaits a urgent need an improved technique and solves this problem that exists among the prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a durable fuel injector to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a durable fuel oil injector comprises a main body, an oil inlet pipe joint, an upper shell, a threaded sleeve, an oil nozzle, an oil duct, an ejector rod channel, an ejector rod, a needle valve, a top plate, a spring, a pressure regulating screw and an oil return pipe, wherein the oil inlet pipe joint is arranged on one side of the main body, the upper shell is arranged at the top end of the main body, the threaded sleeve is arranged at the bottom end of the main body, the oil nozzle is arranged at the bottom end of the threaded sleeve, the oil duct and the ejector rod channel are arranged inside the main body, a cavity is arranged inside the threaded sleeve, one end of the oil duct is communicated with the oil inlet pipe joint, the other end of the oil duct is communicated with the cavity inside the threaded sleeve, the ejector rod is movably arranged in the ejector rod channel, the needle valve is movably arranged in the cavity inside the threaded sleeve, the bottom of the needle valve, the spring bottom links to each other with the roof upper surface, the spring top links to each other with the pressure regulating screw, go up the casing top and be provided with back oil pipe, it is inside intercommunication with the upper shell to return oil pipe.

The inside upper end of the oil nozzle is provided with a valve groove, the valve groove is matched with the bottom end of the needle valve, the side wall of the valve groove is provided with an oil injection channel, the lower surface of the oil nozzle is provided with a plurality of oil injection ports, and one end, far away from the valve groove, of the oil injection channel is communicated with the oil injection ports.

Preferably, the needle valve includes valve body and valve head, the fixed valve head that is provided with in valve body bottom, the valve head activity sets up in the valve groove.

Preferably, a groove is formed at the joint of the upper surface of the main body and the upper shell, and the top plate is movably arranged in the groove.

Compared with the prior art, the beneficial effects of the utility model are that:

by adopting the plug-in needle valve and adopting the valve head side wall to plug the oil injection channel, the oil injection hole is not damaged, and the impact of the needle valve on the oil injection hole does not exist, so that the service life of the oil injector is ensured.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the structure of the oil jet.

FIG. 3 is a schematic view of a needle valve configuration.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, the present invention provides a technical solution: a durable fuel oil injector comprises a main body 1, an oil inlet pipe joint 2, an upper shell 3, a threaded sleeve 4, an oil nozzle 5, an oil duct 6, an ejector rod channel 7, an ejector rod 8, a needle valve 9, a top plate 10, a spring 11, a pressure regulating screw 12 and an oil return pipe 13, wherein the oil inlet pipe joint 2 is arranged on one side of the main body 1, the upper shell 3 is arranged at the top end of the main body 1, the threaded sleeve 4 is arranged at the bottom end of the main body 1, the oil nozzle 5 is arranged at the bottom end of the threaded sleeve 4, the oil duct 6 and the ejector rod channel 7 are arranged inside the main body 1, a cavity is arranged inside the threaded sleeve 4, one end of the oil duct 6 is communicated with the oil inlet pipe joint 2, the other end of the oil duct 6 is communicated with the cavity inside the threaded sleeve 4, the ejector rod 8 is movably arranged in the ejector rod channel 7, the needle valve 9 is movably arranged, go up and be provided with spring 11 and pressure regulating screw 12 in the casing 3, spring 11 bottom links to each other with roof 10 upper surface, and it has the recess to open at 1 upper surface of main part and the 3 junctions of last casing, and roof 10 activity sets up in the recess, and spring 11 top links to each other with pressure regulating screw 12, goes up 3 tops of casing and is provided with back oil pipe 13, returns oil pipe 13 and is linked together with last casing 3 is inside.

As shown in fig. 2, a valve slot 51 is formed in the upper end of the inside of the oil nozzle 5, the valve slot 51 is matched with the bottom end of the needle valve 9, an oil injection channel 52 is formed on the side wall of the valve slot 51, a plurality of oil injection ports 53 are formed on the lower surface of the oil nozzle 5, and one end of the oil injection channel 52, which is far away from the valve slot 51, is communicated with the oil injection ports 53.

As shown in fig. 3, the needle valve 9 includes a valve body 91 and a valve head 92, the valve head 92 is fixedly disposed at the bottom of the valve body 91, and the valve head 92 is movably disposed in the valve groove 51.

The use principle is as follows: in the fuel entered into the inside cavity of swivel nut 4 from advancing oil pipe connector 2, during pressure risees, valve body 91 was jacked up, until valve head 92 along valve groove 51 roll-off, part fuel got into oil spout channel 52 on the valve groove 51 lateral wall, then from nozzle 53 blowout, in addition part fuel entered into upper housing 3 from the pipe-jacking passageway, discharged from oil return pipe 13, thereby the pressure release, the utility model discloses a bayonet needle valve 9 adopts the valve head 92 lateral wall to carry out the shutoff to oil spout channel 52, can not cause any damage to nozzle 53 to the life of sprayer has been guaranteed.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A durable fuel injector characterized by: comprises a main body (1), an oil inlet pipe joint (2), an upper shell (3), a thread insert (4), an oil nozzle (5), an oil duct (6), a push rod channel (7), a push rod (8), a needle valve (9), a top plate (10), a spring (11), a pressure regulating screw (12) and an oil return pipe (13), wherein the oil inlet pipe joint (2) is arranged on one side of the main body (1), the upper shell (3) is arranged on the top end of the main body (1), the thread insert (4) is arranged at the bottom end of the main body (1), the oil nozzle (5) is arranged at the bottom end of the thread insert (4), the oil duct (6) and the push rod channel (7) are arranged in the main body (1), a cavity is arranged in the thread insert (4), one end of the oil duct (6) is communicated with the oil inlet pipe joint (2), the other end of the oil duct (6) is communicated with the cavity in the thread, the needle valve (9) is movably arranged in a cavity inside the threaded sleeve (4), the bottom of the needle valve (9) is movably arranged in the oil nozzle (5), the top end of the ejector rod (8) is connected with the top plate (10), the top plate (10) is movably arranged in the upper shell (3), a spring (11) and a pressure regulating screw (12) are arranged in the upper shell (3), the bottom end of the spring (11) is connected with the upper surface of the top plate (10), the top end of the spring (11) is connected with the pressure regulating screw (12), an oil return pipe (13) is arranged at the top end of the upper shell (3), and the oil return pipe (13) is communicated with the inside of the upper shell (3);

the internal upper end of the oil nozzle (5) is internally provided with a valve groove (51), the valve groove (51) is matched with the bottom end of the needle valve (9), the side wall of the valve groove (51) is provided with an oil injection channel (52), the lower surface of the oil nozzle (5) is provided with a plurality of oil injection ports (53), and one end, away from the valve groove (51), of the oil injection channel (52) is communicated with the oil injection ports (53).

2. A durable fuel injector as set forth in claim 1 characterized further in that: needle valve (9) include valve body (91) and valve head (92), valve body (91) bottom is fixed and is provided with valve head (92), valve head (92) activity sets up in valve groove (51).

3. A durable fuel injector as set forth in claim 1 characterized further in that: the upper surface of the main body (1) is provided with a groove at the joint with the upper shell (3), and the top plate (10) is movably arranged in the groove.