JPS6014955B2 - Electric flow control valve device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric flow control valve device that proportionally controls the flow rate of fluid between two boats using an electromagnetically acting near-motor outer pump.

In general, this type of electric flow control valve device includes a hollow iron 0, a bobbin slidably disposed on the iron 'D, and a direction perpendicular to the winding of an electromagnetic coil wound on the bobbin. A moving coil type linear motor is constituted by permanent magnets arranged so that magnetic flux passes through them, and a magnetic yoke or a magnetic body that forms a magnetic circuit of the permanent magnets together with the iron ○,
Furthermore, in response to the operation of the bobbin, a slide valve slides over the through hole formed on the hollow iron core to control the opening area of the hole, and a direction in which the slide valve fully closes the through hole. It is equipped with a spring that biases the body.

In this kind of conventional device, the aforementioned spring that biases the slide valve has one end connected to the winding of the electromagnetic coil, and the spring end connected to an external terminal leading to the power supply, and the spring that biases the slide valve is connected to the winding of the electromagnetic coil. It had the function of energizing.

However, the pond end side of the spring, which must be connected to the end terminal, is supported by the inner wall of the body, and therefore, it has been impossible to provide a means for adjusting the biasing force of the spring that biases the bobbin or slide valve. In this way, due to the biasing force of the spring whose timing for controlling the entrance area of the lotus hole cannot be adjusted, the operation of the slide valve cannot be achieved at the desired timing, resulting in the disadvantage that the desired fluid flow rate cannot be controlled. There was profit. Therefore, the technical problem of the present invention is to enable adjustment of the biasing force of the spring.

The technical measures taken to solve the above technical problems are:
A spring holder is provided, one end of which allows the other end of the spring connected to the electromagnetic coil to pass through, and the terminal end of the spring can be connected to an external terminal, and the installation position of the spring holder can be adjusted by screw means. It is to be. In the above technical means, the position of the spring holder is adjusted by screwing the screw means forward and backward, and as a result, the biasing force of the spring can be adjusted as appropriate. Therefore, regarding one embodiment according to the present invention, “
The explanation will be based on the attached drawings.

In the disturbance type flow rate proportional control bag calendar 101 shown in the drawing,
A magnetic bar turtle 5 having a second output boat 14 is integrally and airtightly coupled to a magnetic body 13 to which the input boat turtle 1 and the first output boat 12 are fixed. A hollow iron core 18 is installed on a ball inside the body 13, and the inner hollow part of the iron core is divided into a first chamber 20 and a second chamber 21 by a blocking wall 19. The first chamber 2M is suitable for passing the lotus into the first output boat 12, and the second chamber 21' is suitable for passing the lotus into the second output boat. A bobbin 22 made of a non-magnetic material is slidably arranged on the hollow iron core 18, and a magnetic coil 23 is wound on the bobbin. Further, a pair of permanent magnets 24, 2 are attached to the body 3 so that the magnetic flux passes at right angles to the winding of the electromagnetic coil 23.
The magnetic circuits of the permanent magnets 24 and 25 are arranged by the magnetic support members 16 and 7 fixed to the iron core 18 and the support member]6. g7, the body 13, and the cover 15, forming a moving coil type linear motor. On the hollow iron '018, there are a first passage hole 26 through which the first chamber 20 and the input boat 11 are inserted, and a second passage hole 29 through which the second chamber 21 and the input boat 11 are connected. Multiple pieces are formed in a shape. The bobbin 22 is connected to the first and second lotus holes 2 in proportion to the current value applied to the electromagnetic coil 23.
8 and 29 to control the entrance area of the lotus through holes 28 and 29. At this time, the bobbin 22 acts to open the other lotus passage hole when closing one passage hole, that is, the lotus passage between the input boat 11 and the first output boat 12 and the lotus passage between the first output boat 12. This is to control the opening and opening of the door alternately. A spring holder 30 is installed between the hollow core 18 and the magnetic body 13.
There are two coil springs 31 with different center diameters inside.
, 32 are stretched.

The bobbin 22 is always biased to the left in the figure by both springs 31 and 32, and when no current is applied to the electromagnetic coil 23, it comes into contact with a stopper 33 fixed to the body 13, and as a result, the bobbin 22 is in the first position. It is held in a position where the through hole 28 is closed and the 28th lotus through hole 29 is opened. Both springs 31, 32
The ends 31a, 32a of the coil 23 are connected to the ends 23a, 23b of the coil 23 via insulating resins 27a, 27b. The other ends of the springs 31 and 32 (only the other end 32b of the spring 32 is shown) are connected to each other through the hole 3Qa of the holder 30.
It extends through you and is connected to a corresponding terminal terminal (only the terminal 33 corresponding to the other end 32b of the spring 32 is shown) by soldering or the like. Both terminal terminals are appropriately connected to a power source via a connector 34, are disposed within a cutout 36 of the cover wing 5 by an insulating support member 35, and are held by an insulating resin 37. 38 is a silicone rubber seal member 39
The inner weave of the adjusting screw screwed into the cover 15 through the holder 301 comes into contact with the holder 301, and the screw is screwed into the cover 15.
Adjust the position of the holder 38 by screwing it back.
As a result, the biasing forces of both springs 31 and 32 can be adjusted.

This is a ring seal member disposed between the 40-year-old holder 30 and the cover wing 6, and cooperates with the silicone seal member 38 to seal the inside and outside of the cover 15.

A return spring 41' arranged between the support member 6, the turtle 7 and the holder 30 is used to ensure that the holder 30 and therefore the bobbin 22 return to the non-operating position. If the biasing force of is set appropriately, the provision of the return spring is not necessarily required. Incidentally, the biasing force of the yield turn spring can also be adjusted using the screw 39. From the above Yokanari, in the electric flow valve device according to the present invention, the springs 31, 32
The present invention is characterized by the provision of an adjustment screw 39 for adjusting the urging force of the return spring 41, and the adjustment method will be described in detail below. First, the other ends of both springs 31 and 32 (only 32b is shown) and each end of the corresponding terminal terminal (only 33 is shown) are connected by soldering or the like, and then the t-cover IS and the body turtle 3 are fixed by caulking. In this situation,
Connect the terminal terminal and connector 34, and tighten the adjustment screw 3.
9 is screwed onto the cover 15, and the silicone seal member 38 is filled. The biasing force of the springs 31, 32, and 41 is adjusted via the holder 30 by screwing the adjusting screw 39 forward and backward as appropriate. After adjustment, the support member 35 is attached to the cover 15.
By arranging the iron in the notch 36 and disposing the insulating resin 37, assembly is completed with the desired spring biasing force. In the above configuration, the operation of the electric flow rate valve device 10 will be explained.

When no input current is applied to the crab coil 23, the bobbin 22 is biased to the left in the figure by the springs 31, 32 and the return spring QI, closing the first lotus hole 28 and closing the second lotus hole 29. Therefore, the input boat wing 1 is cut off from the first output boat 12, and
The second output boat 14 and Lotus are suitable. In addition, under normal conditions, the hollow iron core 18,
A closed loop magnetic circuit is formed via the support member 16, IT, body 13, cover 15, etc., and a part of it communicates with the electromagnetic coil 23. In this state, the electromagnetic coil 2
When an input current is applied to fin 3, a force proportional to the fin flow value is generated in the right direction in the figure according to the well-known Fleming's left-hand rule. Therefore, the bobbin 22 is actuated and displaced in the right direction in the figure against the biasing forces of both springs 31 and 32, and as a result, the first lotus through hole 28 is opened and the second lotus through hole 29 is closed. The first and second lotus through holes 28 and 29 have sufficient length in all axial directions.
In proportion to the amount of rightward displacement of the slide valve 27, the entrance area of the first lotus through hole 28 increases and the entrance area of the second lotus through hole 29 decreases. In this way, the bobbin 22 acts as a so-called three-way type control valve that alternately controls the disconnection of the lotus passage between the input boat 11 and the first output boat 12 and the lotus passage between the second output boat 14. be. The electric flow rate control device 10 of the above embodiment can be used, for example, in an exhaust gas purification system for an automobile engine, by connecting the input boat 11 to an air pump, connecting the first output boat 12 to an exhaust system, and connecting the second output boat 11 to an air pump. The boat 14 is connected to the cleaner, and the electromagnetic coil 2 is connected to the electromagnetic coil 2 by a computer or the like that generates output signals according to engine temperature, engine negative pressure, engine rotation speed, etc.
3 is configured to receive an input electrical signal, the function of the known secondary air supply system can be achieved.

As detailed above, in the electric flow rate control valve device according to the present invention, means is provided for appropriately adjusting the biasing force of the spring means that biases the bobbin, which also functions as a valve valve, to the non-operating position. , it becomes possible to start the operation of the bobbin at a locally optimal time, and as a result, it has the effect that a desired fluid flow rate can be controlled.

[Brief explanation of the drawing]

The figure is a sectional view of an electric flow rate control valve device showing one embodiment of the present invention. 10...Electric flow control valve device, 11...Input boat ~ 12, 14...Output boat, 13...Body, 16...Cover, 18...Iron core, 22...・Bobbin, 23... Electromagnetic coil, 24, 25...
・Permanent magnet, 28, 29... lucky hole, 30... spring holder, 31, 32... spring, 33...
Terminal terminal, 39...adjustment screw.

Claims (1)

[Claims] 1. A body having an input port and an output port, a hollow core disposed within the body and having a communication hole connecting the two ports, and an opening area of the communication hole disposed so as to be slidable on the outer periphery of the core. a bobbin that controls the bobbin; a magnetic body that forms, together with the iron core, a magnetic circuit of magnetic flux generated by permanent magnets arranged so that the magnetic flux passes at right angles to the windings of the electromagnetic coil wound on the bobbin; A spring means which urges the communicating hole in the direction of fully opening and whose one end is connected to the winding of the electromagnetic coil, and which allows the other end of the spring means to pass through, thereby allowing the other end of the spring means to be opened externally. Spring holder that allows connection with terminals,
and an electric flow rate control valve device comprising screw means that can adjust the installation position of the spring holder.