FI69199C - FAESTANORDNING FOER ETT PAOVERKNINGSORGAN PAO EN REGLERVENTIL - Google Patents

Description

691 99

CONTROL VALVE INSTITUTION ATTACHMENT

The invention relates to a device to which an adjustable valve and an actuator can be attached, and which device transmits the movement of the actuator to the valve stem and in which there is a rolling bearing formed by the parts themselves and the balls between the device body and the slide.

When the valve stem has to be moved by means of actuators, various sliding bearing members have typically been used in devices designed for this purpose. The functionality of these members is hampered by the high friction and susceptibility of the bearing surfaces to contamination, as well as the large clearances caused by the wear of the plain bearing surfaces.

Clearances are particularly detrimental because the control motors are often slow, in which case the clearances cause a delay in the control event and an overdrive of the control system.

To reduce these disadvantages, a device according to the invention has been developed which uses a rolling bearing to minimize friction and reduce the clearances of the device.

In addition, when using the device according to the invention, a very advantageous control of small flows is achieved, which is often important, for example, in the control of hot water, as well as the maximum force acting on the valve stem when the valve is closed.

The invention is characterized by the features mentioned in the characterizing part of claim 1.

The following is a closer look at some embodiments of the device, which may be other than the examples below.

List of drawing patterns

Figure 1 is a longitudinal section of the fastening device

Figure 2 is a cross-section of the fastening device

Figure 3 is a side view of the fastening device

Fig. 4 is a plan view of an embodiment of the fastening device in which the abutment surfaces (111) (112) (311) (312) are formed as straight-walled grooves

Fig. 5 is a graphical representation of the relationship between the angle of rotation of the control motor shaft and the movement of the valve stem attached to the fastening device in one embodiment

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69199

The device consists of a body part (1) fig. 3, made of two pieces, a base plate (11) and a body back plate (12), a rolling bearing consisting of balls (20), a ball holder (21) and mating surfaces (111) (112) (311) (312), fig. . 2 and 4, and a slide (3) consisting of a slide plate (31) and a corner piece (32) and other parts to be named below.

The purpose of the body part (1) is to act as an adjustable support member of the valve (8) and the adjusting device, the hand lever (4) or the adjusting motor (9) and as a second abutment surface of the rolling bearing. For this purpose, the back plate (12) of the body part (1) is attached to the base plate (11), preferably by welding. The body part (1) can also be made in one piece. The back plate (12) is bent into a U-shape so that the parts (111) and (112) of the inner surface of the U-prongs, fig. 2, is shaped to act as a second abutment surface of the roller bearing balls (20). Figure 4 shows counter-surfaces (111) (112) (311) (312) formed as a straight-walled groove with a side angle of 90 °. The mating surfaces can also be of other shapes. The back plate (12) can also be used to attach or support the bearing (51).

An adjustable valve (8) is attached to the base plate (11).

A slide (3) is placed inside the body part (1), fig. 3, consisting of a slide plate (31) and a corner piece (32) · The slide plate (31) is bent U-shaped so that the parts (311) and (312) of the outer surface of the U-prongs are shaped to act as a second abutment surface of the roller bearing balls (20). Fig. 2 and 4.

A stem (81) of an adjustable valve (8) is attached to an angle piece (32) attached to the slide plate.

A rolling bearing is formed from the parts (111) (112) (311) (312) of the body part (1) and the slider (3) and the balls (20). The balls are held in position by a ball holder (21), which is a plate-shaped U-shaped body with spaces for the balls (20) in the jaw parts of the U.

An elongate opening is made in the slide plate (31) in which a rotating element (61) fixed to the lever (6) is placed. The rotating element (61) fits into the opening in the slide plate (31) without play, fig. 1 and 3. When the shaft (5) of the lever (6) is turned either by the handle (4) or by means of the motor (9), the slide plate (31) moves on the rolling bearing and moves the angle piece (32) and the valve stem (81) attached to it, fig.3. . When the hole (33) and the stem (81) of the angle piece move on the same axis and the hole (33) is selected to be larger than the diameter of the figure (81), the valve stem can be fixed to the slide with a flexible fastening (7) consisting of nuts (72) (71) fig. 1 and 3.

In this case, the spring package (71) can be selected so that it acts as a safety spring, or it can limit the closing force of the stem (81) and thus extend the service life of the valve.

If the valve control device is equipped exclusively for manual operation, a retaining device (42) (43) must be used in connection with the handles (4), fig. 2 or other lock.

The shaft (5) leaving the handle (4) can be mounted on the back of the body (12) with a bearing (51) in order to improve the adjustment result. It is also possible to use, for example, a gearmotor (9) or other rotating device built for control purposes to rotate the shaft (5). In this case, the retaining device (42) (43) can be removed. The handle (4) and the gearmotor (9) can also be used together.

When a motor with a pivot angle of 90 ° to 100 ° on the output shaft is used as the gear motor (9), a good low-flow control result is obtained in the control, because the adjustment distance of the valve stem (81) per rotation of the motor shaft decreases when the valve is closing, fig. 3 and 5.

In this case, the closing force acting on the stem (81) is also at its maximum when the valve (8) is closed.

Other solutions can also be constructed from the device on the basis of the claims.

Claims (2)

4 PATENT CLAIMS 6919 9 A device for transmitting the rotational movement of an actuator used for adjusting a valve as an opening and closing movement of a valve stem, characterized in that the device has a body part (1) to which a valve (8) is attached and which acts as a second abutment bearing surface (111). ) (112), and a slide (3) to which the rotational movement of the valve adjusting actuator is transmitted and to which the spindle (81) of the valve (8) is attached and which slider (3) acts as a second abutment surface (311) (312) of the rolling bearing. > Device according to claim 1, characterized in that the device has - a body part (1) to which a valve (8) is attached and in which the recesses (111) (112) bent into the back plate (12) made of the body part (1) act as a rolling bearing as a second abutment surface, and a slide (3) to which the rotational movement of the valve adjusting actuator is transmitted and to which a spindle (81) of the valve (8) is fixed to the slide piece (31) and to which the slide plate (31) is bent (311) 312) which act as a second abutment surface of the rolling coil. M