JPH0321794B2 - - Google Patents

Abstract

PURPOSE:To correctly adjust a flow by generating magnetic force in a passageway so that an electrode is caused to generate a signal by the flowing of a fluid in the passageway and indicating a flow rate onbtained from the signal in such a manner as to be visible on the outside. CONSTITUTION:An exciter 33 is mounted in a handle body 20 for adjusting the opening of a valve, and the exciter forms means 34 for generating megnetic line of force together with portions 25-30 in a valve body 14. A converter 35 is disposed on the exciter and adapted to detect a flow rate by receiving a voltage proportional to a flow rare, which is alternately opposite in polarity from both electrodes 22 through terminals 24 for the electrodes and electric wires 23 for the electrodes in the valve body 14. The detected flow rate is indicated on an indicator 38 of a handle 19.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention comprises an immovable outer box having a passage through which a fluid passes, and an outer box which is reversibly displaceable with respect to the outer box and whose displacement causes at least one of the passages to pass through. a valve body that continuously changes a part of the fluid passage area between fully open and fully closed, and a handle that is located outside the outer box and operates the valve body to cause the valve body to undergo the displacement. Regarding flow control valves.

B. Conventional technology Conventional flow control valves of this type did not have a display device to show the flow rate, so they could not accurately adjust the flow rate with only that device. The disadvantage was that the piping was complicated because a flow meter was required.

C. OBJECT OF THE INVENTION The object of the invention is to obtain a flow control valve which incorporates a flow rate display device within itself and as a result does not have the above-mentioned drawbacks of the prior art.

D. Structure of the Invention As will be explained in detail later using Examples, the structure of the present invention is that, in the flow rate regulating valve, the inside of the entire movable part consisting of the valve body 14 and the handle 19 is , a pair of electrodes 22 exposed on the inner surface of the passage, a magnetic force line generation means 34 for generating lines of magnetic force in a direction intersecting the power line to be generated between the electrodes 22 in the passage, and a converting device 35 that generates a flow rate signal proportional to the flow rate based on the voltage generated between the electrodes 22; a display device 38 that visually displays the flow rate on the handle 19 based on the flow rate signal; , the flow rate control valve with a display device is equipped with an electromagnetic flowmeter comprising the magnetic force line generating means 34, the converting device 35, and the power supply means 41 that supplies power to the display device 38.

E. Embodiment In the embodiment shown in FIG. 1, the outer box 1 is immovable and consists of two parts: an inlet side part 1A having an inlet passage 2A and an outlet side part 1B having an outlet passage 2B. 1B are made of metal or plastic, and are almost symmetrical to each other with mating surfaces in between. When the mating surfaces are vertical and both parts 1A and 1B are integrated in a normal relationship, the center lines of both passages 2A and 2B coincide with the horizontal line (X-X), and both parts 1A and 1
Between B, there is a spherical space 3 with a spherical surface on the inner surface whose center O is the intersection of the horizontal line (X-X) and the mating surface, and a vertical line (Y-Y) extending below and passing through the center O as the center line. A lower cylindrical space 4 has on its inner surface a cylindrical surface and a circular horizontal surface connected to the lowest part of this cylindrical surface, and a cylindrical surface that extends above the spherical space 3 and has a vertical line (Y-Y) as its center line on its inner surface. An upper cylindrical space 5 with an open upper end is created.

The inlet side portion 1A and the outlet side portion 1B consist of four bolts 6 ( (Fig. 2) and four nuts 7 (Fig. 3) screwed into these, and both parts 1
As shown in perspective views in FIGS. 4 and 5, on the mating surfaces of A and 1B, there is a U that is located inside the through hole of the bolt 6 and that surrounds the spaces 3, 4, and 5 in a U-shape, and faces each other. Cross grooves 8A and 8B, and both grooves 8A and 8
A U-shaped gasket 9 is packed in a space 8 consisting of B to maintain airtightness between the inside and outside surrounded by the U-shape. Both parts 1A and 1B are provided on the inner periphery of the upper cylindrical space 5.
The shaft O-ring 11 is inserted into the shaft annular groove 10, and the U-shaped grooves 8A and 8B are connected to the shaft annular groove 10 at both upper ends. It is integrally connected to the outer periphery of. Spherical part annular grooves 12A and 12B are formed in the inner surface of the spherical space 3 in a portion surrounding each of the inlet and outlet passages 2A and 2B, and a spherical part O is formed in this part.
Rings 13A and 13B are packed. When the shaft O-ring 11 and the spherical O-rings 13A and 13B are simply stuffed and there is no valve body 14, which will be described later, they protrude slightly inward from the inner surfaces of the upper cylindrical space 5 and the spherical space 3, and are not exposed to the outside. When a later-described valve body 14 is sandwiched between both parts 1A and 1B of box r, it is pushed into annular grooves 10, 12A and 12B in the shaft and spherical parts, respectively.

The valve body 14 is made of electrically insulating and non-magnetic plastic, and fits into the inner surfaces of the spherical space 3, the lower cylindrical space 4, and the upper cylindrical space 5, as shown in Figures 1, 2, and 4. Consisting of a spherical part 15, a lower cylindrical shaft 16, and an upper cylindrical shaft 17, which are in contact with each other and are rotatable around a vertical line (Y-Y), the spherical part 1
5 is penetrated by an internal passage 18 having a horizontal centerline through the center O.

The internal passage 18 is symmetrical about the center O, and is an internal space of a passage pipe 18b made of non-magnetic stainless steel with an electrically insulating lining 18a on the inner surface, and the internal diameter at both ends is the same as that of the inlet passage 2A and the outlet passage 2B. The diameter gradually becomes smaller in the shape of a conical hole toward the center O, and in a small area near the center O it is cylindrical with a smaller diameter than both ends.

The relationship between the inner diameter of both ends of the internal passage 18 and the diameter of the spherical part 15 is such that both ends of the internal passage 18 are connected to the entrance passage 2A.
A vertical line (Y-
Constant closing position (3rd position) rotated 90 degrees around Y)
When the valve body 14 is kept at the position shown in FIG. Spherical part 1
In the rotation range 5, the fluid passage area is set so that it maintains the closed state O only in a certain section a (approximately 30 degrees) following this fixed closed position, and then gradually expands until it reaches the fully open position.

When assembling the valve body 14 into the outer box 1, first, the shaft portion O to which the U-shaped gasket 9 is integrally attached.
The ring 11 is hermetically fitted to the upper cylindrical shaft 17 as shown in FIG.
Spherical part O in spherical part annular grooves 12A and 12B of 1B
After filling the rings 13A and 13B, the shaft O-ring 11 is filled in the shaft annular groove 10, and the U-shaped gasket 9 is filled in the space 8 consisting of the U-shaped grooves 8A and 8B, and the inlet side is A valve body 14 is inserted between the outlet side parts 1A and 1B to prevent fluid leakage to the outside between the upper cylindrical shaft 17 and both parts 1A and 1B, and to prevent fluid from leaking to the outside between the upper cylindrical shaft 17 and the two parts 1A and 1B, and in the vicinity of the constant closing position (FIG. 3). This prevents fluid from leaking from the inlet side to the outlet side, or from the inlet side to the outlet side without passing through the internal passage 18 in the vicinity of the fully open position (FIG. 1). Between the constant closed position and the fully open position, in the state shown in FIG. 6, the inlet side and the outlet side communicate through the gap between the spherical part 15 and the spherical space 3, but the fluid does not flow. When the pressure is on, the pressure difference between the inlet and outlet sides is generally small and the practical effect is small.

The handle 19 includes a handle body 20 and a handle lid 21.
It consists of. The handle body 20 is a cylindrical box with an open top.The shaft O-ring 11 is fitted to the upper cylindrical shaft 17, felt packings 19a are fitted to each other, and the bottom center hole 20a is inserted into the upper cylindrical shaft 17 of the valve body 14. The anti-rotation recess 20b is attached to the upper end protrusion 17a, and the anti-rotation protrusion 1
7b and is adhered to the fitting shoulder 17c. The handle lid 21 has an O-ring 21b filled in an annular groove 21a to keep the handle body 20 airtight.
It is fixed with four machine screws 21c to cover the upper opening of the screw, and has a convex portion 21d along the diameter on which the fingers of the hand can be placed when turning.

As shown in FIG. 2, the internal passage 18 of the valve body 14
A pair of electrodes 22 passing through the lining 18a and the passage pipe 18b via an insulator are exposed at opposing positions horizontally sandwiching the center O on the inner surface of the electrically insulating lining 18a, each of which is connected to a respective electrode. It is connected to each of a pair of electrode terminals 24 provided on the upper end convex portion 17a of the upper cylindrical shaft 17 via electric wires 23.

A magnetic path body 25 is provided, which is made up of two parts, sandwiching the passage tube 18b from above and below and having respective magnetic poles and bonding the magnetic poles to the passage tube 18b.
It has an extension part 26 that extends in a direction perpendicular to both the horizontal line (Y-Y) and the horizontal line (Y-Y).
A magnetic path combination body is formed by connecting two magnetic paths in parallel with each other. This magnetic path coupler is created by short-term excitation of alternating opposite polarities.
It is constructed only of ordinary steel so that the magnetic poles are alternately magnetized to opposite polarities. (The magnetic path may have a structure in which a permanent magnetic material is inserted.) Each iron core 27 is wound with an excitation coil 28 so that the polarity of the magnetic field generated between the two magnetic poles of the magnetic path body 25 is the same when energized. Connect in series to
Both ends of this series connection are connected to each of a pair of excitation terminals 30 provided on the upper end convex portion of the upper cylindrical shaft 17 via each excitation wire 29 . Passage pipe 18b
is the reference potential terminal 3 via the reference potential electric wire 31.
Connected to 2.

The valve body 14 includes a lining 1 having an electrode 22, an excitation coil 28, and a magnetic path body 25 with an iron core 27.
8a, the electrode terminal 24, the excitation terminal 30, and the reference potential terminal 32 are maintained in the correct relationship, and the electrode wire 23 and the excitation wire 2 are
9 and reference potential wire 31 are properly connected, and these are wrapped and molded with plastic material.

An excitation device 33 is attached inside the handle body 20. This is the excitation terminal 30 inside the valve body 14.
A current is passed through the excitation coils 28 alternately in opposite directions for short periods of time through the excitation wires 29 to
7. The magnetic path consisting of the extension portion 26 and the magnetic path body 25 is alternately magnetized to opposite polarities, and a horizontal line (X-X ) is a device that generates lines of magnetic force in alternately opposite directions perpendicular to the valve body 14, and constitutes a line of magnetic force generating means 34 together with the respective portions 25 to 30 within the valve body 14.

Inside the handle body 20, a conversion device 35 is mounted on an excitation device 33. This receives a voltage proportional to the flow rate whose polarity is alternately opposite from both electrodes 22 through an electrode terminal 24 and an electrode wire 23 in the valve body 14, and generates a flow rate signal proportional to the flow rate based on the voltage. This is a device that calculates a flow rate integrated value based on a flow rate signal. On the upper side of the converter 35, there is a flow rate display unit 36, such as an ammeter type indicator, which displays the flow rate based on the flow rate signal;
The display device 38 includes a flow rate integrated value display section 37 that displays the flow rate integrated value calculated by the conversion device 35. Display sections 36 and 3 for flow rate and flow rate integrated value
7 display surfaces 39 and 40, respectively, are located in respective semicircles divided by diametric lines at the top of the display device 38.

A portion of the circuit constituting the excitation device 33 and the conversion device 35 that should be set to a reference potential is connected to the passage pipe 1 via the reference potential terminal 32 and the reference potential electric wire 31.
It is connected to 8b.

Inside the handle body 20, there is further a conversion device 35,
A lithium battery is provided as a power supply means 41 for supplying power to the excitation device 33 and the display device 38.

In the above structure, the electrode 22 built into the valve body 14 and the handle 19, each electric wire 23, 29, 31,
Each terminal 24, 30, 32, magnetic force line generation means 34,
Conversion device 35, display device 38, and power supply means 41
collectively constitute one electromagnetic flowmeter that detects the flow rate in the internal passage 18.

Convex portion 21d along the diameter of handle lid 21
corresponds to the diameter line that separates the display surfaces 39 and 40, and the transparent glass 4 is provided only in the portion directly above the display surfaces 39 and 40.
2.43 is fitted airtight.

As shown in FIGS. 1 and 2, a permanent magnet 44 is embedded in one location directly facing the lower surface of the handle body 20 in the entrance side portion 1A of the outer box 1, and the fixed closed position (the third ), the part of the handle body 20 that directly faces the permanent magnet 44 is closed by approaching the permanent magnet 44, and the handle body 20 is closed in the certain area a.
A magnetic response switch 45 is provided with a reed switch that opens until the switch is turned by 30 degrees.

As shown in FIG. 7, the emitter collector section of a transistor (Tr) is inserted in series with the circuit that feeds power from one pole of the power supply means 41 to the excitation device 33 in the forward direction with the emitter on the side of the power supply means 41. The base is connected to the other pole of the power supply means 41 via a resistor (R), and the magnetically responsive switch 45 is inserted between the base terminal and emitter terminal of the transistor (Tr) to supply power. The power supply to the excitation device 33 by the means 41 is made possible due to the reversal of the opening and closing of the magnetically responsive switch 45 when the handle 19 goes to the fully open position, and disabled due to the reversal when the handle 19 goes in the opposite direction. Excitation power supply control means 4
It consists of 6.

As shown enlarged in FIGS. 8 and 9, the handle 1 is placed on the side surface of the convex portion 21d of the handle lid 21.
A recess 47 is provided in the part pressed by the fingers of the hand when turning the switch 9, and contact pieces 49 and 50 constituting the manual switch 48 are mounted inside the recess 49 and 50 facing each other and separated from each other insulatingly, thereby isolating the contact piece 47 from the outside. The entire surface is covered with a soft rubber film 51, and a frame 52 is pressed against the entire circumference and this frame 52 is adhered to the convex portion 21d. The outer surface of the soft rubber membrane 51 forms a pressing portion 53 that is flush with the outer surface of the convex portion 21d, and while the fingers of the hand press this, the contact pieces 49 and 50 come into contact and the manual switch 48 is closed.

This manual switch 48 is inserted into the circuit for supplying power to the display device 38 in the circuit shown in FIG. 7, and allows the power supply means 41 to supply power to the display device only when the pressing portion 53 is pressed. This constitutes a display power supply control means that is normally disabled.

The present invention can also be applied to a valve having a conical valve body, as shown in a cross-sectional view in FIG.

F. Effect The flow control valve with display device of this invention has a valve body 14.
Since the electromagnetic flowmeter is provided inside the entire movable part consisting of the handle 19 and the handle 19, the flow rate of the fluid flowing through the internal passage 18 is displayed on the display device 38 of the handle 19.

Although the power supply means 41 is provided inside the entire movable part, when the excitation power supply control means 46 is added as in the above embodiment, the valve body 14 is in the constant closed position and the flow rate is O. Excitation current does not flow during the interval. Furthermore, when the display power supply control means 54 is added as in the embodiment described above, the display current does not flow except when the handle 19 is operated or when the display is desired to be read.

G. Effects of the Invention According to the present invention, the flow rate can be adjusted accurately by operating the handle 19 while looking at the display on the display device 38, so the flow rate adjustment work is easy, and moreover, a separate flowmeter is required. The piping is simple because it is not necessary. The aforementioned drawbacks of working technology have thus been eliminated.

In addition, since the entire electromagnetic flowmeter is built inside the entire movable part consisting of the valve body 14 and the handle 19, work such as coupling and conversion of the electromagnetic flowmeter to the outer box is extremely easy. .

Incidentally, when the excitation power supply control means 46 and the display power supply control means 48 are added as in the embodiment described above, wasteful power consumption is greatly reduced. These power supply control means 46, 48 are only possible in an electromagnetic flowmeter attached to a flow rate control valve.

[Brief explanation of the drawing]

1 to 9 all relate to one embodiment of the present invention, in which FIG. 1 is a longitudinal sectional view, FIG. 2 is a sectional view taken along YY in FIG. 1, and FIG. Fig. 4 is a sectional view taken along line X-X when the valve body 14 is rotated 90 degrees around the vertical line (Y-Y). FIG. 5 is a perspective view of the inlet side portion 1A of the outer box 1.
(same shape as the outlet side part 1B), FIG. 6 is a sectional view of the valve body 14 rotated approximately 50 degrees in the sectional view of FIG. 3, FIG. 7 is a circuit diagram, and FIG. FIG. 9 is an enlarged sectional view of the convex portion of the hand, and is a sectional view taken along the line U-U in FIG. 8. FIG. 10 is a sectional view of another embodiment. 1... Outer box, {2A... Inlet passage, 2B... Outlet passage, 18... Inner passage, } passage, 14... Valve body, 19... Handle, 22... Electrode, 34... Line of magnetic force Generating means, 35... Conversion device, 38... Display device, 41... Power supply means, 48... Display power supply control means (manual switch), 46... Excitation power supply control means.

Claims (1)

[Scope of Claims] 1. An immovable outer box 1 having passages 2A, 2B, and 18 through which fluid passes, and a reversible displacement of the outer box 1, which changes the fluid passage area of at least a portion of the passages. A flow rate adjustment device having a valve body 14 that is continuously changed between fully open and fully closed, and a handle 19 that is located outside the outer box 1 and that operates the valve body 14 to cause the valve body 14 to undergo the displacement. The valve has a pair of electrodes 22 exposed on the inner surface of the passage inside the entire movable part consisting of the valve body 14 and the handle 19, and a pair of electrodes 22 that should be formed between the electrodes 22 in the passage. a magnetic field line generation means 34 for generating magnetic field lines in a direction intersecting the power line, and a conversion device 35 for generating a flow signal proportional to the flow rate based on the voltage generated between the electrodes 22 via the fluid in the passageway; An electromagnetic device comprising a display device 38 that visually displays the flow rate on the handle 19 based on the flow rate signal, and a power supply means 41 that supplies power to the magnetic field line generation means 34, the conversion device 35, and the display device 38. A flow control valve with a display device, characterized in that it is equipped with a flowmeter. 2. In the flow control valve with a display device according to claim 1, the pressing portion 53 is located at the portion of the handle 19 that is pressed by a finger during operation.
and the display device 38 located inside the handle 19 or the valve body 14 and provided by the power supply means 41.
A flow rate regulating valve with a display device, characterized in that it is equipped with a display power supply control means 48 that enables power supply to the press portion 53 only when the pressing portion 53 is pressed, and disables power supply normally. 3. The flow control valve with a display device according to claim 1, wherein the fluid passing area is the constant within a displacement range of the handle 19 in which the valve body 14 reaches the constant closed position to the fully open position. The closed state is maintained only for a certain period following the closed position and then gradually expanded until the fully open position is reached, the outer box 1 is equipped with a permanent magnet 44, and the handle 19
The permanent magnet 4 passes through the certain section inside the
The switch 45 is provided with a magnetically responsive switch 45 whose opening/closing state is reversed in response to the magnetism of the switch 4, and the power supply means 41 supplies power to the magnetic force line generating means 34 through the reversal when the handle 19 moves toward the fully open position. excitation power supply control means 4 that is enabled due to the excitation and disabled due to the reversal when going in the opposite direction;
6. A flow rate control valve with a display device, comprising: