CN217003115U - Flow-adjustable fuel electromagnetic valve - Google Patents

Abstract

The utility model discloses a fuel electromagnetic valve with adjustable flow in the technical field of electromagnetic valves, and aims to solve the problems that the control accuracy of the output quantity of fuel is low and the loss of the fuel is easily caused in the existing fuel electromagnetic valve in the prior art. The valve comprises a shell, a left valve body and a right valve body; the left valve body and the right valve body are connected with the left end and the right end of the shell; a fixed iron core and a movable iron core which are matched with each other to run are arranged in the cavity of the shell; a valve core is arranged in the cavity of the right valve body, and a flow passage is reserved between the valve core and the right valve body; the left end of the valve core is connected to the right end of the movable iron core; a sealing steel ball is arranged at the right end of the valve core; the right end of the cavity of the right valve body is provided with a throttle valve plate with a small throttle hole; the utility model is suitable for small-sized combustors and is suitable for the precision control of the fuel flow on the small-sized combustors.

Description

Flow-adjustable fuel electromagnetic valve

Technical Field

The utility model relates to a fuel electromagnetic valve with adjustable flow, belonging to the technical field of fuel electromagnetic valves.

Background

The historical development of the technical field of the burner in China is relatively shorter than that of industrial developed areas such as Europe, the vitality is vigorous, the market is in the rising period, and the production is stably increased; with the environmental protection importance of the country beginning to control the carbon emission amount, the design of the burner mainly tends to the improvement of the emission and efficiency level, the fuel flow control requirement of the burner is continuously improved, and the heat supply stability of the burner and the control of the fuel combustion efficiency and emission amount are determined by the flow control precision on the small burner. At present, the flow control of some domestic small diesel burners is realized by a mechanical plunger pump, and the small diesel burners are large in size, high in manufacturing cost and low in small flow control precision and flow adjustability.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provide the fuel electromagnetic valve with the adjustable flow, which has the advantages of simple structure, high control precision and accurate control of the flow of fuel.

In order to achieve the purpose, the utility model is realized by adopting the following technical scheme:

the utility model provides a fuel electromagnetic valve with adjustable flow, which comprises a shell, a left valve body and a right valve body; the left valve body and the right valve body are respectively correspondingly connected with the left port and the right port of the shell; a fixed iron core and a movable iron core which are matched with each other to run are arranged in the cavity of the shell;

a valve core is arranged in the cavity of the right valve body, and a flow passage is reserved between the valve core and the right valve body; the left end of the valve core is connected to the right end of the movable iron core; a sealing steel ball is arranged at the right end of the valve core; the right end of the cavity of the right valve body is provided with a throttle valve plate with a small throttle hole; the right end of the throttling orifice is connected with the valve port; an oil outlet hole is arranged in the radial direction of the valve core and communicated with the cavity of the valve core;

springs are arranged in the cavities of the fixed iron core and the movable iron core; coil assemblies are arranged on the peripheries of the fixed iron core and the movable iron core; when the power is on, the movable iron core moves leftwards, and simultaneously, the movable iron core drives the valve core to move leftwards; the sealing steel ball is separated from the valve port; when the power is off, the movable iron core moves rightwards, and simultaneously, the movable iron core drives the valve core to move rightwards; the sealing steel ball is mutually matched with the valve port.

Further, the coil assembly comprises a coil winding, a winding framework and a coil shell; and the winding framework and the coil shell support and fix the coil winding.

Furthermore, the valve port is of a conical surface structure.

Further, a closed loop is arranged between the coil assembly and the right valve body.

Furthermore, a filter is arranged in the cavity of the left valve body.

Furthermore, the left end of the left valve body is an oil inlet end, and the right end of the right valve body is an oil outlet end; the oil inlet end is provided with a first O-shaped sealing ring.

Furthermore, a second O-shaped sealing ring is arranged between the throttle valve plate and the right valve body.

With reference to the first aspect, furthermore, a third O-ring is disposed on the right valve body.

Compared with the prior art, the utility model has the following beneficial effects:

compared with the flow control of some domestic small diesel burners realized by depending on a mechanical plunger pump, the flow-adjustable fuel electromagnetic valve provided by the utility model can be electronically driven; the flow-adjustable fuel electromagnetic valve has the advantages of small volume, light weight and low manufacturing cost, and can accurately control the output of small-flow fuel flow.

Drawings

FIG. 1 is a schematic cross-sectional view of a fuel solenoid valve;

FIG. 2 is a schematic diagram of pulse width modulated current and valve port operation;

in the figure: 1. a filter; 2. a left valve body; 3. an outgoing line; 4. a winding framework; 5. a spring; 6. a housing; 7. a right valve body; 8. a third O-ring seal; 9. a second O-ring seal; 10. a throttle plate; 11. a steel ball; 12. a valve core; 13. a movable iron core; 14. a closed loop; 15. a coil winding; 16. a coil housing; 17. the iron core, 18, first O shape sealing washer.

Detailed Description

The utility model is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical solution of the present invention; and should not be taken as limiting the scope of the utility model.

In the description of the present invention; it is to be understood that; the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like refer to an orientation or positional relationship as shown in the drawings; for convenience in describing the utility model only and to simplify the description; rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation; and therefore should not be construed as limiting the utility model. Furthermore; the terms "first", "second", etc. are used for descriptive purposes only; and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thereby; a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of the feature. In the description of the present invention; unless otherwise stated; "plurality" means two or more.

In the description of the present invention; it is to be noted that; unless explicitly stated or limited otherwise; the terms "mounted," "connected," and "connected" are to be construed broadly; for example; can be a fixed connection; or can be detachably connected; or integrally connected; may be a mechanical connection; or may be an electrical connection; can be directly connected; or indirectly connected through an intermediate medium; there may be communication between the interiors of the two elements. To those of ordinary skill in the art; the specific meanings of the above-mentioned terms in the present invention can be understood by concrete conditions.

The first embodiment is as follows:

referring to fig. 1, the present embodiment provides a fuel solenoid valve with adjustable flow rate, which includes a housing 6, a left valve body 2, a right valve body 7, a coil assembly, a fixed iron core 17, and a movable iron core 13. The fixed iron core 17 and the movable iron core 13 are mutually matched and assembled in the cavity of the shell 6. The left valve body 2 is connected to the left end of the shell 6, and the right port of the left valve body 2 is connected with the fixed iron core 17 in a matching manner; the right valve body 7 is connected to the right end of the housing 6. The left end of the left valve body 2 is an oil inlet end, and the right end of the right valve body 7 is an oil outlet end.

A valve core 12 is arranged in a cavity of the right valve body 7, and a flow passage is reserved between the valve core 12 and the right valve body 7, so that fuel oil can be discharged from the flow passage. The left end of the valve core 12 is connected with the right end of the movable iron core 13. The right end of the valve core 12 is provided with a sealing steel ball 11. The right end of the cavity of the right valve body 7 is provided with a throttle valve sheet 10, the throttle valve sheet 10 is provided with a small throttle hole, and the aperture of the small throttle hole determines the fuel flow when the electromagnetic valve port is fully opened. The right end of the small throttling hole is connected with the valve port. An oil outlet hole is arranged in the radial direction of the valve core 12 and communicated with the cavity of the valve core 12.

The cavity of the fixed iron core 17 and the movable iron core 13 is internally provided with a spring 5, the peripheries of the fixed iron core 17 and the movable iron core 13 are provided with coil components, and the coil components are connected with an external power supply through the outgoing lines 3. When the coil component is electrified, the movable iron core 13 is attracted by electromagnetic force, overcomes the attraction of the spring 5, moves leftwards, and drives the valve core 12 to move leftwards, at the moment, the steel ball 11 is separated from the valve port, fuel oil sequentially enters the cavity of the fixed iron core 17, the cavity of the movable iron core 13 and the cavity of the valve core 12 through the cavity of the left valve body 2 in the process, then flows to the valve port through the oil outlet hole and flows to the flow channel between the right valve body 7 and the valve core 12, and then flows out of the small throttling hole.

When the coil assembly is powered off, the electromagnetic force disappears, the movable iron core 13 loses the attraction force towards the left, the spring 5 pushes the movable iron core 13 to move towards the right under the action of the elastic force and drives the valve core 12 to move towards the right, and at the moment, the steel balls 11 can be in fit with the valve ports to block fuel oil from flowing out of the small throttling holes.

Preferably, the valve port is of a conical surface structure, so that the valve port can be closely fitted when being contacted with the steel ball 11, and the fuel oil is blocked from flowing out of the small throttling hole.

Preferably, the coil assembly includes a coil winding 1515, a winding bobbin 4 and a coil housing 16, the winding bobbin 4 is disposed on the inner circumference of the coil winding 1515 as a support frame of the coil winding 1515, and the coil housing 16 is connected to the outer circumference of the coil winding 1515 to protect the coil winding 1515.

Preferably, a closed loop 14 is arranged between the coil assembly and the right valve body 7 to ensure that the coil winding 1515 is communicated with the magnetic field loop between the fixed iron core 17 and the movable iron core 13.

Preferably, a filter 1 is arranged in the cavity of the left valve body 2 and used for filtering fuel oil with impurities entering from the oil inlet end of the left valve body 2, and the phenomenon that the throttling pores are blocked by the impurities to influence the operation of the fuel oil electromagnetic valve is avoided.

Preferably, the oil inlet end of the left valve body 2 is provided with a first O-shaped sealing ring 18, when the oil inlet end of the left valve body 2 is butted with an external part, the sealing performance of the joint can be ensured by the first O-shaped sealing ring 18, and the phenomenon that the entered fuel leaks from the joint to cause fuel waste and avoid potential safety hazards is avoided.

Preferably, a second O-shaped sealing ring 9 is arranged between the throttle valve plate 10 and the right valve body 7. After the power is switched on, when fuel oil flows out to the throttling small hole through the oil outlet and the flow channel between the right valve body 7 and the valve core 12, the second O-shaped sealing ring 9 can prevent the fuel oil from seeping out from the connecting part of the throttling valve plate 10 and the right valve body 7, and the accuracy of the fuel oil output from the throttling small hole can be ensured.

Preferably, set up third O type sealing washer 8 on right valve body 7, when the end of producing oil of right valve body 7 docks the external component, the leakproofness of junction can be guaranteed to third O type sealing washer 8, prevents that the fuel that gets into from oozing from the junction, avoids the accuracy of fuel output to receive the influence and avoids the fuel extravagant and produce the potential safety hazard.

Example two:

the embodiment provides a control method of a fuel solenoid valve with adjustable flow, and the control method comprises the fuel solenoid valve in the first embodiment. And an external power supply on the control system is connected with the coil assembly through an outgoing line 3 and is used for controlling the on-off of current. Specifically, the controller controls the flow of the fuel oil by adopting a pulse width modulation control mode, controls the on-off time ratio of a valve port of the electromagnetic valve by the percentage of the pulse width, and adjusts the output flow of the fuel oil.

As shown in fig. 2, when PWM is 100%, the valve port is in a fully open state, the flow rate is the maximum flow rate, when PWM is 50%, the output flow rate of the electromagnetic valve is 50% of the maximum flow rate, and so on, but considering the flow resistance of the fuel, the minimum controllable flow rate is not less than 10%.

The foregoing are only preferred embodiments of the present invention; it should be noted that; to those of ordinary skill in the art; without departing from the technical principle of the utility model; several modifications and variations are possible; such modifications and variations are also to be considered as within the scope of the utility model.

Claims (8)

1. A fuel electromagnetic valve with adjustable flow is characterized by comprising a shell, a left valve body and a right valve body; the left valve body and the right valve body are respectively correspondingly connected with the left port and the right port of the shell; a fixed iron core and a movable iron core which are matched with each other to run are arranged in the cavity of the shell;

a valve core is arranged in the cavity of the right valve body, and a flow passage is reserved between the valve core and the right valve body; the left end of the valve core is connected to the right end of the movable iron core; a sealing steel ball is arranged at the right end of the valve core; the right end of the cavity of the right valve body is provided with a throttle valve plate with a small throttle hole; the right end of the throttling orifice is connected with the valve port; an oil outlet hole is arranged in the radial direction of the valve core and communicated with the cavity of the valve core;

springs are arranged in the cavities of the fixed iron core and the movable iron core; coil assemblies are arranged on the peripheries of the fixed iron core and the movable iron core; when the power is on, the movable iron core moves leftwards, and simultaneously, the movable iron core drives the valve core to move leftwards; the sealing steel ball is separated from the valve port; when the power is off, the movable iron core moves rightwards, and simultaneously, the movable iron core drives the valve core to move rightwards; the sealing steel ball is mutually matched with the valve port.

2. The adjustable-flow fuel solenoid valve according to claim 1, wherein said coil assembly comprises a coil winding, a winding frame and a coil housing; and the winding framework and the coil shell support and fix the coil winding.

3. The fuel solenoid valve of claim 1, wherein the valve port is of a tapered configuration.

4. The variable flow fuel solenoid valve of claim 1, wherein a closed loop is provided between said coil assembly and said right valve body.

5. The variable flow fuel solenoid valve of claim 1, wherein a filter is disposed within the cavity of the left valve body.

6. The fuel solenoid valve of claim 1, wherein the left end of the left valve body is an oil inlet end and the right end of the right valve body is an oil outlet end; the oil inlet end is provided with a first O-shaped sealing ring.

7. The fuel electromagnetic valve with the adjustable flow rate as claimed in claim 1, wherein a second O-shaped sealing ring is arranged between the throttle plate and the right valve body.

8. The fuel solenoid valve with adjustable flow rate of claim 1, wherein a third O-ring is disposed on the right valve body.

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