JPH10220621A - High speed response type flow and pressure control valve and control method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high speed response type flow control valve and pressure control valve whose valve bodies are joined to electromagnetic coils moving in electromagnetic solenoids to reduce the weight of movable parts of the valve body system. SOLUTION: A flow control valve V1 and a pressure control valve V are high speed type response control valves which control flow and pressure by the position of a valve body 5 to a valve seat 3 and the valve body 5 is joined to an electromagnetic coil M1 moving in a magnetic solenoid MS. This reduces the weight of movable parts of the valve body and fast moves the valve body by the movable electromagnetic coil.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow control valve for opening and closing a valve body with respect to a valve seat, and controlling a flow rate or a pressure by a displacement of the opening and closing position. More particularly, the valve body is movable within an electromagnetic solenoid. The control valve is capable of responding at high speed by being connected to an electromagnetic coil.

[0002]

2. Description of the Related Art Conventionally, a control valve that opens and closes a valve body with respect to a valve seat, and controls a flow rate and a pressure by displacement of the opening and closing position, connects the valve body to a movable iron piece of an electromagnetic solenoid,
The movable iron piece of the electromagnetic solenoid controls the opening amount of the valve body according to the value of the current supplied to the electromagnetic solenoid.

[0003]

In the flow rate and pressure control valve, since the valve body is connected to the movable iron piece of the electromagnetic solenoid, the current value of the electromagnetic solenoid is changed. Takes a long time. this is,
This is because the mass of the movable iron piece is large in addition to the mass of the valve body itself. The flow control valve having such a structure has a problem in that it cannot follow a load that requires rapid opening and closing control or flow control of a fluid such as air at a high speed.

Therefore, in order to open and close the valve at a higher speed, there is a case in which the electromagnetic solenoid is devised to have a large size. In this method, the desired high-speed operation cannot be expected simply by increasing the size of the electromagnetic solenoid more than necessary. That is, there is a drawback that the mass of the movable iron piece increases to make it difficult to operate at a high speed, and that the power consumption and the installation area must be increased.

The present invention has been made in view of the above-mentioned problems of the prior art. In particular, in order to reduce the movable mass of a valve system, a lightweight electromagnetic device with a small number of turns for moving a valve body within an electromagnetic solenoid. An object of the present invention is to provide a flow rate and pressure control valve which can be connected to a coil and which can respond at high speed.

[0006]

According to a first aspect of the present invention, there is provided a control valve for opening and closing a valve body with respect to a valve seat, and controlling a flow rate and a pressure by displacement of the opening and closing position. A high-speed response type flow and pressure control valve, characterized in that the body is connected to an electromagnetic coil movable in an electromagnetic solenoid.

According to the first aspect, the driving body of the valve system is connected to the lightweight movable electromagnetic coil, and the movable electromagnetic coil is driven at a high speed by the electromagnetic solenoid. Thus, the movable mass of the valve system is reduced, and the valve body can be operated at high speed by the movable electromagnetic coil.

A second aspect of the present invention is a control valve for opening and closing a valve body with respect to a valve seat, and controlling a flow rate and a pressure by displacement of the opening and closing position, wherein the valve body is a movable electromagnetic coil in an electromagnetic solenoid. And a flow rate and pressure control valve of a high-speed response type, characterized in that the movable electromagnetic coil controls the opening amount of the valve body by a current value applied to the movable electromagnetic coil.

According to the second aspect, the driving body of the valve system is connected to the lightweight movable electromagnetic coil, and the movable electromagnetic coil is driven at a high speed by the electromagnetic solenoid. Thus, the movable mass of the valve system is reduced, and the movable electromagnetic coil controls the opening amount of the valve at a high speed by the current value applied to the movable electromagnetic coil. Therefore, fluctuations in the flow rate and the operating pressure on the load side, which require a high speed, can be generated and controlled with high speed response.

According to a third aspect of the present invention, the amount of opening of the valve body is determined by comparing a deviation between an operating flow rate information source and an operating pressure information source required on the load side and a flow rate and a measured flow rate and a measured pressure in the main body of the pressure control valve. 3. The control method for a flow rate and pressure control valve according to claim 2, wherein the flow rate and the pressure are controlled as an operation flow rate and pressure information source, and the operation flow rate and the operation pressure on the load side are generated in a fast response. .

According to the third aspect, the driver of the valve system is driven at a high speed by the lightweight movable electromagnetic coil. Thus, by comparing the deviation between the operating pressure information source required on the load side and the actually measured pressure in the body of the flow control valve, the opening amount of the valve body is controlled like the operating pressure information source, and a high speed is required. Load-side flow rate and operating pressure can be generated with high-speed response.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram of a pressure control valve according to a first embodiment of the present invention, and FIGS.

FIG. 1 shows a pressure control valve V according to the present invention.
Is for opening and closing the needle valve element 5 with respect to the valve seat 3 in the main body 1 and controlling the pressure Lo of the fluid L such as gas or liquid from the fluid supply source Po by displacement of the opening and closing position. . The needle valve element 5 is connected to a light-weight movable electromagnetic coil M1 having a small number of turns and movable in the electromagnetic solenoid MS. The movable electromagnetic coil M1 is fitted to a central pole M2 of an E-shaped permanent magnet Mo so as to be movable at a high speed. The needle valve body 5 is made of a material having good wear resistance, such as a ceramic or a titanium alloy.

When a positive or negative DC current is applied to the movable electromagnetic coil M1, both ends of the movable electromagnetic coil M1 are magnetized into N or S magnetic poles, and the permanent magnet Mo is turned on.
With respect to the N and S magnetic poles, the magnetic head is moved in the direction of the valve seat 3 by being attracted and repelled or moved to the opposite side, and the opening X thereof is linearly controlled. That is, the movable electromagnetic coil is connected to the valve 5 in proportion to the magnitude of the current value I to energize the movable electromagnetic coil M1.
Is controlled.

The pressure control valve V of the present invention incorporates a pressure sensor S in the outlet side of the valve seat 3 in the main body 1 and has, for example, a fluid injection port (injection noise) 10 on the load side. The measured pressure Po from the pressure sensor S of the pressure control valve V is:
This is a source of information that is compared with the operating pressure P required on the load side. That is, the measured pressure Po from the pressure sensor S is output as a signal from a computer or the like to the operating pressure P of the operating pressure information source 12 required on the load side, and is input to a comparator 15 for comparing the deviation with the signal. The deviation comparison signal E from the comparator 15 is amplified by the deviation amplifier 17.

As shown in FIG. 2, the operating pressure information source 12 repeats a variable pressure waveform ΔP of the same operating pressure P at a high speed with a constant period with respect to a time axis, or different operating pressures at a constant period. For example, when the fluctuation pressure waveform ΔP of P repeats at a high speed, or when the operating pressure P fluctuates irregularly,
Various high-speed fluctuating pressures are targeted.

The deviation comparison signal E is supplied to a movable electromagnetic coil M1 by a driver 20 driven by a drive power supply 19.
The magnitude of a DC current value I to be supplied to the valve body 5 is controlled by the movable electromagnetic coil based on the current value I. By controlling the pressure Lo of the fluid L passing through the opening, the measured pressure Po becomes the operating pressure P required on the load side.
The required load pressure P is controlled by controlling the opening amount X of the valve body 5 so as to be generated as follows.

The configuration of the present invention is as described above.
The operation will be described below. First, the needle valve element 5 is connected to a light-weight movable electromagnetic coil M1 of an electromagnetic solenoid MS which is the driving body. This movable electromagnetic coil M1
When a plus or minus DC current is added to
Both ends of the movable electromagnetic coil M1 are magnetized into N or S magnetic poles,
The N and S magnetic poles of the permanent magnet Mo are attracted and repelled to move in the direction of the valve seat 3 or to the opposite side, and are proportional to the magnitude of the current value I that is supplied to the movable electromagnetic coil M1. The movable electromagnetic coil controls the opening amount X of the valve element 5.

The opening / closing response speed of the needle valve body 5 with respect to the valve seat 3 can be applied to a repetition speed from 0 Hz to about 20,000 HZ since the driving body is a lightweight movable electromagnetic coil M1. That is, since it has the same structure as the voice coil of the speaker, high-speed response up to about 20 KHZ is guaranteed. Thus, as shown in FIG. 2, an operating pressure information source 12 that repeats a variable pressure waveform ΔP of the same operating pressure P (0 to 7 kgf / cm ² ) at a constant period (around 50 HZ) at a high speed with respect to a time axis is provided. Comparator 1
Send to 5.

The comparator 1 receiving the operating pressure information source 12
5 also receives the measured pressure Po from the pressure sensor S of the pressure control valve V. As a result, the comparator 15 sends a deviation comparison signal E, which is compared with the operating pressure P required on the load side, to the deviation amplifier 17, and the current value I to be supplied to the movable electromagnetic coil M 1 by the driver unit 20 becomes large or small. The movable electromagnetic coil controls the opening amount X of the valve element 5 based on the current value I. By controlling the pressure Lo of the fluid L passing through the opening to an appropriate value, the needle valve element 5 is adjusted so that the measured pressure Po is generated at the operating pressure P required on the load side and the fluctuating pressure waveform ΔP. Control at high speed.

According to the embodiment of the present invention, the following effects can be obtained. First, a driver of a valve system is connected to a lightweight movable electromagnetic coil, and the movable electromagnetic coil is driven at a high speed by an electromagnetic solenoid. In addition, the movable electromagnetic coil can control the opening amount of the valve element at a high speed by the magnitude of the current value to be supplied to the movable electromagnetic coil for reducing the movable mass of the valve system.
Further, the opening amount of the valve body is controlled like an operating pressure information source by comparing the deviation between the operating pressure information source required on the load side and the actually measured pressure in the main body of the pressure control valve, and a high speed is required. The operating pressure on the load side can be generated in a high-speed response.

The present invention is not limited to the above embodiment.
For example, the valve body of the pressure control valve V can be changed to another type of valve configuration instead of the needle valve. Further, the pressure control valve V
Various types of pressure detecting means can be adopted as the pressure sensor S in the main body. The drive system of the movable electromagnetic coil is not limited to the illustrated one. Further, the pressure control valve and its control method of the present invention can be applied as a pressure control technique for various fluid devices that require a high-speed response, and can be rationally applied to various fluid devices that do not require a high-speed response.

The pressure control valve V is connected to a flow control valve V1.
And a flow sensor S1 is built in the outlet side.
The opening amount of the valve body may be changed as in the second embodiment in which the opening amount of the valve body is controlled like the working flow information source 12 'by comparing the deviation with the actually measured flow amount in the main body of the flow control valve. According to the second embodiment, the working flow rate information source required on the load side, the opening amount of the valve body is controlled like the working flow rate information source by comparing the deviation between the measured flow rate in the main body of the flow control valve, An operating flow rate on the load side that requires a high speed can be generated at a high speed response.

[0024]

According to the first aspect of the present invention, the driving body of the valve system is connected to the lightweight movable electromagnetic coil, and the movable electromagnetic coil is driven at a high speed by the electromagnetic solenoid. Thus, the movable mass of the valve system is reduced, and the effect that the valve body can be operated at high speed by the movable electromagnetic coil is exhibited.

According to the second aspect, the movable electromagnetic coil controls the opening amount of the valve at a high speed by the current value to be supplied to the movable electromagnetic coil for reducing the movable mass of the valve system.
The effect of controlling the fluctuation of the operating flow rate on the load side and the operating pressure on the load side that require a high speed in a high-speed response is exhibited.

According to the third aspect, the deviation of the operating pressure information source or the operating flow rate information source required on the load side from the measured pressure or the measured flow rate in the main body of the pressure control valve or the flow control valve is compared with the deviation of the valve body. The opening amount is controlled like an operating pressure information source or an operating flow rate information source, and an effect that the operating flow rate and the operating pressure on the load side requiring a high speed can be generated in a high-speed response.

[Brief description of the drawings]

FIG. 1 is a system diagram showing a pressure control valve and a control method thereof according to the present invention.

FIG. 2 is a curve diagram showing an operating pressure characteristic of an operating pressure information source according to the present invention.

FIG. 3 is a curve diagram showing another working pressure characteristic of the working pressure information source according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Main body 3 Valve seat 5 Needle valve body 10 Fluid injection port (injection noise) 12 Working pressure information source 12 'Working flow rate information source 15 Comparator 17 Deviation amplifier 19 Drive power supply 20 Driver section E Deviation comparison signal L Fluid Lo Pressure P Actuation Pressure Po Measured pressure I Current value MS Electromagnetic solenoid M1 Moving electromagnetic coil M2 Center pole Mo Permanent magnet S Pressure sensor S1 Flow sensor V Pressure control valve V1 Flow control valve

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI G05D 7/06 G05D 7/06 Z 16/20 16/20 A

Claims (3)

[Claims] 1. A control valve for opening and closing a valve body with respect to a valve seat, and controlling a flow rate and a pressure by a displacement of the opening and closing position, wherein the valve body is connected to an electromagnetic coil movable within an electromagnetic solenoid. A high-speed response type flow rate and pressure control valve, characterized in that: 2. A control valve for opening and closing a valve body with respect to a valve seat, and controlling a flow rate and a pressure by a displacement of the opening and closing position, wherein the valve body is connected to a movable electromagnetic coil in an electromagnetic solenoid. A high-speed response type flow rate and pressure control valve control method, wherein the movable electromagnetic coil controls the opening amount of the valve body according to a current value applied to the movable electromagnetic coil. 3. The difference between the operating flow information source and the operating pressure information source required on the load side and the measured flow rate and the measured pressure in the main body of the flow rate and pressure control valve is compared with the operating flow rate and the measured flow rate. 3. The control method for a flow rate and pressure control valve according to claim 2, wherein the flow rate and the pressure are controlled as a pressure information source, and the operation flow rate and the operation pressure on the load side are generated in a fast response.