JP4606353B2 - Rotary flow control valve - Google Patents

Description

  The present invention relates to a rotary flow control valve that controls the flow rate of a fluid such as pressure oil, cutting fluid, or cooling water.

  Conventionally, a flow rate control valve, a solenoid valve, a throttle valve, or the like is used for speed control of a hydraulic cylinder or the like, or for adjusting a flow rate of cooling water or cutting oil of various apparatuses. Various types of rotary flow control valves have been proposed as flow control valves for this purpose.

  For example, a two-pole magnet is fixed to the shaft of the rotary valve, and a pair of yokes are arranged opposite to the magnet, thereby forming a magnetic path, and a magnetic flux generated by the coil flows through the yoke. A rotary flow control valve has been proposed in which the opening of the rotary valve is changed by changing the magnetic flux (Patent Document 1).

A technique for controlling the flow rate and direction of the return heat medium from the molding die with a rotary valve has also been proposed (Patent Document 2).
JP-A-4-136578 JP 62-173219 A

  However, in the rotary flow control valve of Patent Document 1 described above, the opening degree is changed by changing the magnetic flux generated by the current flowing in the coil, so it is difficult to precisely adjust the opening degree. There is a problem that it is not easy to control the flow rate.

  Moreover, since such a rotary flow control valve has a complicated structure, there is a problem that it is difficult to reduce the size because the outer dimensions are large.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a compact rotary flow rate control valve capable of precisely adjusting the opening degree and easily controlling the flow rate.

The rotary flow control valve according to the present invention has two housing members and a disc-shaped rotary valve body sandwiched between the two housing members, and the two housing members have a flow through them. holes are provided, wherein the rotary valve member is provided with a valve bore for varying the opening degree of the flow holes in accordance with the rotation angle position from the minimum to the maximum, the rotary valve body, the outer periphery of its face, the projects radially outwardly at the two arc-shaped plurality of recesses provided on the side portion of the outer peripheral surface of the housing member, the rotary projecting in one recess of the plurality of recesses in contact with the outer peripheral surface of the valve body is a motor for rotating the rotary valve body, attached to said housing member, the outer peripheral surface of the rotary valve member protruding in another recess of the plurality of recesses , Manually rotated It has become the order of the manual operating section.

  Preferably, a sphere is press-fitted into a hole provided at a center position of the rotary valve body, and the rotary valve body is inserted into the recess provided in the two housing members, whereby the rotary valve body is The two housing members are rotatably supported.

  An annular seal member for sealing between the two housing members and the two surfaces of the rotary valve body is mounted.

Also, the the rotary valve body is provided arcuate grooves, between the two housing members, the angle regulating pin for regulating the rotation angle of said rotary valve element through the groove provided It is done.

  According to the present invention, it is possible to provide a compact rotary flow control valve capable of precisely adjusting the opening and easily controlling the flow rate.

  1 is a front view of a flow control valve 1 according to an embodiment of the present invention, FIG. 2 is a cross-sectional front view of the flow control valve 1, FIG. 3 is a cross-sectional side view of the flow control valve 1, and FIG. It is a figure which shows a state.

  In these drawings, the flow control valve 1 includes two housing members 11 and 12, a rotary valve body 13, a motor 14, and the like.

  The housing members 11 and 12 are made of a metal material, a synthetic resin, or the like, and are formed in a substantially rectangular shape in front view as well shown in FIGS. 1 and 2. The housing members 11 and 12 can be manufactured by casting, lost wax, resin molding, or machining, or a combination thereof.

  As well shown in FIG. 3, the housing members 11, 12 are provided with flow holes 21, 22 that pass through them. Each of the circulation holes 21 and 22 includes screw portions 211 and 221 for connecting piping members and the like, and flow paths 212 and 222 having circular cross sections. The peripheral portions of the screw portions 211 and 221 have a hexagonal cross section on the outer periphery and protrude outward from the main body portion.

  On the inner side surfaces of the housing members 11 and 12, as shown in FIG. 2, sliding surfaces 31 and 32 that are recessed in a circular shape are formed, leaving quadrangular four corner portions 33 a to d and 34 a to d. Has been. The sliding surfaces 31 and 32 are provided with spherical or cylindrical recesses 23 and 24 at the center thereof, and circumferential grooves 25 and 26 are provided on the circumference centering on the recesses 23 and 24. The four corner portions 33a to 33d on the side of the housing member 11 are provided with holes, respectively, and the four corner portions 34a to 34d on the side of the housing member 12 are provided with holes whose outer portions are screw portions. ing. From the holes of the four corner portions 33a to d to the holes of the four corner portions 34a to 34d, the spigot bolts 35a to 35d are inserted and screwed, whereby the two housing members 11 and 12 are positioned and integrated with each other. Yes.

  The inlay bolts 35a to 35d are fitted into the holes of the four corner portions 33a to 33d and the holes of the four corner portions 34a to 34d to perform positioning in the radial direction, and the tip thereof. It is a well-known thing which has a screw shaft part which is on the side and is screwed into the screw hole. In the above description, four such inlay bolts 35 are used, but only two inlay bolts 35 may be used, and the latter two may be ordinary bolts.

  In addition, on the outer peripheral surfaces of the housing members 11 and 12, arc-shaped concave portions 27a to 27d and 28a to 28d are provided at four positions in the center of each side portion.

  The rotary valve body 13 is made of a metal material or a synthetic resin, and is formed in a disk shape as well shown in FIG. The diameter of the rotary valve body 13 is slightly smaller than the diameter of the outer circumference of the sliding surfaces 31 and 32, and the thickness thereof is slightly smaller than the distance between the two sliding surfaces 31 and 32. A hole is provided at the center position of the rotary valve body 13, and a hard ball 41 is press-fitted into the hole, and the hard ball 41 is rotated by being fitted into the recesses 23 and 24 provided in the two housing members 11 and 12. The valve body 13 is rotatably supported with respect to the two housing members 11 and 12. That is, the hard ball 41 serves as a rotation shaft, and the recesses 23 and 24 serve as bearings, so that the surface of the rotary valve body 13 rotates while closely contacting the sliding surfaces 31 and 32.

  The rotary valve body 13 is provided with a valve hole 42 that varies the opening degree of the flow holes 21 and 22 from zero to the maximum according to the rotation angle position. As well shown in FIG. 4, the valve hole 42 extends along a circumferential line centered on the center point P1 of the hard ball 41 from a circular portion substantially the same as the diameter of the flow paths 212 and 222, and gradually. The width narrows and ends with a small circular part. Depending on the rotational angle position of the rotary valve body 13, the opening of the valve hole 42 is variably adjusted between the flow paths 212 and 222.

  That is, as shown in FIG. 4A, when the rotation angle of the rotary valve body 13 is 0 degree, the opening degree of the flow paths 212 and 222 is the maximum. As shown in FIG. 4B, the opening degree of the flow paths 212 and 222 is gradually reduced as the rotation angle of the rotary valve body 13 increases. As shown in FIG. 4C, when the rotation angle of the rotary valve body 13 is maximized, the openings of the flow paths 212 and 222 become zero. Thus, according to the rotation of the rotary valve body 13, the flow rate control and blocking in the flow paths 212 and 222 can be performed.

  The rotary valve body 13 is provided with an arc-shaped slit groove 43, and an angle regulating pin 44 provided so as to protrude from the sliding surface 32 of the housing member 12 is fitted into the slit groove 43. The range of the rotation angle position of the body 13 is regulated.

  In addition, annular seal members 45 and 46 are mounted in the circumferential grooves 25 and 26 provided in the housing members 11 and 12, and the sliding surfaces 31 and 32 and the rotary valve body 13 are separated by the seal members 45 and 46. There is a seal between the two surfaces. In addition, although it is preferable to use a lip packing having a high sealing effect against pressure from the inside in the radial direction as the sealing members 45 and 46, other sealing members such as an O-ring may be used.

  A gear 47 is provided on the outer periphery of the rotary valve body 13, and the gear 47 protrudes outward in the radial direction in the recesses 27 a to d and 28 a to d of the housing members 11 and 12. In a portion of the gear 47 that protrudes from the recesses 27a and 28a, a gear 51 described later is engaged and rotationally driven. Moreover, the part which protruded from the recessed parts 27b-d and 28b-d in the gearwheel 47 is a manual operation part for rotating manually.

  The motor 14 is attached to a mounting portion 111 protruding upward from the housing member 11 with a screw or the like. A gear 51 is attached to the rotation shaft of the motor 14, and the rotary valve body 13 is rotated by the gear 51. As the motor 14, a pulse motor, a stepping motor, an AC motor, or the like is used, and its rotation angle, rotation speed, and the like are controlled by a control device (not shown). Further, a rotary encoder or the like is attached to the motor 14 as necessary, and pulses output therefrom are input to the control device and used for controlling the motor 14.

  Next, the operation of the flow control valve 1 will be described.

  When piping is connected to the screw portions 211 and 221 and fluid is supplied from the screw portion 211, for example, the fluid flows from the flow hole 21 toward the flow hole 22 at a flow rate corresponding to the degree of opening of the valve hole 42. . By driving the motor 14 and rotating the rotary valve body 13 by the gear 51, the position of the valve hole 42 can be changed and the opening degree can be variably adjusted from zero to the maximum. The opening degree can be controlled by a control signal such as a pulse applied to the motor 14.

  For example, the rotational angle position of the rotary valve body 13 can be controlled in an open loop by counting the number of pulses applied to the motor 14 from the origin position of the rotary valve body 13, for example, the position of zero opening or maximum opening. And the opening degree can be controlled.

  Since the reduction ratio between the gear 51 and the gear 47 is large, the rotary valve body 13 can be rotationally driven with a sufficiently large torque even if the output torque of the motor 14 is small, and the rotational angle position of the rotary valve body 13 can be determined. The accuracy is good and the flow rate can be adjusted accurately.

  Further, the flow rate can be adjusted by grasping the gear 47 by hand and manually rotating the rotary valve body 13 without using the motor 14. In addition, it is possible to visually check the opening degree by providing a scale around the gear 47 or its periphery.

  The fluid flowing into the flow holes 21 and 22 does not leak to the outside due to the sealing by the seal members 45 and 46.

  Thus, according to the flow control valve 1, the opening degree can be adjusted precisely, and the flow control can be easily performed. Further, the structure of the flow control valve 1 is simple, the number of parts is small, and the whole is compact. In particular, since the opening is adjusted by the thin rotary valve body 13, the length along the pipe axis direction in which the flow holes 21, 22 are provided is small.

  According to the flow control valve 1, it also functions as a stop valve by making the opening degree zero. However, a minute minimum opening may be left without making the opening zero.

  Next, a flow control valve 1B according to another embodiment will be described.

  FIG. 5 is a cross-sectional side view of a flow control valve 1B according to another embodiment of the present invention.

  In the flow control valve 1B shown in FIG. 5, a flow sensor 15 is added to the flow control valve 1 shown in FIG. 1, and the housing member 12B is added to the housing member 12 in FIG. Has been slightly changed. The housing member 11, the rotary valve body 13, and the motor 14 are the same as those in FIG. Accordingly, the description of the same structure and operation will be omitted, and only the difference will be described.

  The housing member 12 </ b> B does not have a portion corresponding to the screw portion 211 of FIG. 1, and a rectifying restrictor 61 is provided in the flow path 222. The flow of the fluid flowing into the flow sensor 15 is adjusted by the rectifying restrictor 61. The fluid that sequentially passes through the circulation hole 21, the valve hole 42, and the circulation hole 22B enters the flow path 62, flows into the flow detection chamber 63, and rotates the impeller. As a result, the flow sensor 15 outputs a pulse signal corresponding to the flow rate. The flow rate of the fluid is detected by counting the pulse signal and performing various other processes.

  The fluid enters the flow path 62 from the flow detection chamber 63 and exits from the pipe connected to the screw portion 65.

  The opening degree of the valve hole 42 can be controlled by the rotary valve body 13, and various flow control systems can be constructed by combining with the output from the flow sensor 15.

  According to the flow control valve 1B, since the rotary flow control valve and the flow sensor 15 are integrated, piping for connecting them to each other is unnecessary, and the whole is compact and installation space is small. I'll do it.

  In the flow control valves 1 and 1B described above, the shape of the valve hole 42 provided in the rotary valve body 13 may be a shape other than that described above. For example, a circle, an ellipse, a rectangle, a triangle, etc. may be used. Although the gear 47 is provided on the outer periphery of the rotary valve body 13, various types of the gear 47 can be adopted. Alternatively, the rotary valve body 13 may be rotated by transmitting a rotational force by friction with the rotation shaft of the motor 14 without providing the gear 47.

  In addition, the structure, shape, dimensions, number, material, etc. of the whole or each part of the housing members 11, 12, the rotary valve body 13, the motor 14, the flow sensor 15, or the flow control valve 1, 1B are in accordance with the spirit of the present invention. Can be changed as appropriate.

It is a front view of the flow control valve concerning one embodiment of the present invention. It is a cross-sectional front view of a flow control valve. It is a cross-sectional side view of a flow control valve. It is a figure which shows the variable state of a flow path. It is a sectional side view of the flow control valve concerning other embodiments of the present invention.

Explanation of symbols

1, 1B Flow control valves 11, 12 Housing member 12B Housing member 13 Rotary valve body 14 Motor 15 Flow sensor 21, 22 Flow hole 22B Flow hole 23, 24 Recess 41 Hard ball (sphere)
42 Valve hole 43 Slit groove (groove)
44 Angle restriction pins 45, 46 Seal member 47 Gear (outer peripheral surface)

Claims (5)

Two housing members and a disc-shaped rotary valve body sandwiched between the two housing members,
The two housing members are provided with flow holes passing therethrough,
The rotary valve body is provided with a valve hole for varying the opening degree of the flow hole from the minimum to the maximum according to the rotation angle position thereof.
The rotary valve body, the outer peripheral surface of its is, projects outwardly in the radial direction in the two arc-shaped plurality of recesses provided on the side portion of the outer peripheral surface of the housing member,
The motor for contact with the outer peripheral surface of the rotary valve member which projects for rotating the rotary valve body in one of the recesses of the plurality of recesses is attached to said housing member,
The outer peripheral surface of the rotary valve body protruding in the other concave portion of the plurality of concave portions is a manual operation portion for manually rotating.
A rotary flow control valve characterized by that. A sphere is press-fitted into a hole provided at a central position of the rotary valve body, and the rotary valve body is fitted into a recess provided in the two housing members, whereby the rotary valve body is moved into the two housing members. It is supported rotatably against
The rotary flow control valve according to claim 1. An annular seal member for sealing between each of the two housing members and the two surfaces of the rotary valve body is mounted.
The rotary flow control valve according to claim 1 or 2. The two housing members are substantially rectangular in front view,
The plurality of recesses are provided at four locations in the center of the side portions of the outer peripheral surfaces of the two housing members, and the outer peripheral surface of the rotary valve body protruding in the recesses provided at three locations is the manual operation. It is an operation part,
The rotary flow control valve according to any one of claims 1 to 3. The rotary valve body is provided with an arcuate groove,
Between the two housing members, there is provided an angle regulation pin for regulating the rotation angle of the rotary valve body through the groove.
The rotary flow control valve according to any one of claims 1 to 4.