SU2482A1 - Distributor to servomotor servicing regulating device - Google Patents

Description

When a fluid flows through a strong constriction, such as, for example, through pipelines: water, a canal, etc., clogging of the bottleneck from the gradual deposition of sewage can easily occur. If the constriction has a very small diameter, the constriction of the constriction can easily occur and is full, which will entail great inconvenience.

These inconveniences are especially sensitive in regulators that are actuated by a fluid, under pressure, specifically in devices that control the permutation of the main organ, for example, a valve, etc. In regulator devices of this kind, the cross-sections of the narrowing orifices are very small, as a result of which the blockage occurs easily, causing irregularities in action.

To eliminate this, an oil or other liquid, purified by filtration and circulating through a regulating device, is used, but such a device is very expensive and does not differ in its impeccable action.

The present invention aims at eliminating the aforementioned disadvantages and achieving full reliability of action by automatically cleaning the mentioned constriction during the operation of a regulating device, which can be used as a working substance for a regulating device of any crude liquid, such as water from a water supply system, a reservoir and t. under.

FIG. 1, 2, 3, 4, 5, and 6 depict longitudinal sections of the parts of the adjusting devices forming the constriction, and FIG. 7 shows a complete regulating device equipped with the proposed device.

FIG. 1 depicts a so-called diaphragm valve for a regulator. The membrane 7, to which the piston gold nick 4 is attached, is on one side under the action of the coil spring 2, and on the other under the pressure of the fluid in chamber 3. The piston spool regulates the flow of the working fluid to and from the servomotor. Servo I lhotora not shown. Port j-spool 4 is provided, as usual, with a recess, by means of which groove 6 arranged in a spool box communicates with the channel leading to the servomotor, shown by dotted circles in the drawing. When the piston is moved in one direction or another, groove b, and along with them, the servomotor is brought into connection either with channel 5 for supplying the working fluid or channel 7 for diverting it. The space 3 under the membrane 7 is connected by channel 8 with the nutrient channel 5; A filter 77 is also attached to the plug 9. The channel 8 includes a pin 10 fixed on the shoulder 77 connected to the piston 4 and forming a narrowing in the channel corresponding to the desired flow of liquid into the space 3. The shoulder 77 is connected to the piston 4 in a way that can; rotate near the piston, but forcibly follow the longitudinal movements of the piston, which force the Schuft Yu to move in channel 8, which clears the constricted area, the department of settled impurities that are carried away by the leaking fluid.

Through the opening 72, the space 3 is in communication with the sensitive organ, so called. relay. The latter regulates the amount of working fluid that flows from space 3, depending on the emissions in the system. If, for example, due to the changes that have occurred, the amount of fluid flowing out of space 3 decreases, then the pressure in this space will increase somewhat, because the amount: the fluid flowing into it remains approximately approximately constant, as a result of which the membrane 7 displaces the piston 4 is upwards, compressing the spring 2. As a result, the inlet channel 5 is brought into communication

with groove b, and through it with a servomotor into which the quantity of working fluid flows corresponding to the movement of the piston.

Conversely, if, for some reason, the amount of fluid flowing out of space 3, due to the influence of the relay, increases so that it exceeds the amount of fluid flowing into space 3, then the pressure in the latter drops and the diaphragm and spring are repelled by spring 2 as a result, the groove, and with it the servomotor, comes in connection with the outlet channel 7, and the fluid flows out of the servomotor, causing a corresponding permutation of the main regulated organ.

From this, it follows that with such movements of the piston continuously repeating during operation, the pin 70 walks back and forth in the channel 8 and thereby clears the constriction.

FIG. 2 shows the modified form of the diaphragm valve shown in FIG. 1. In this form, the connection between the inlet channel 5 and the space 3 is achieved by means of a notch in the piston 4. In the channel 76 there is a rod 70 fixed to the valve cover. The space 75 under the piston slide 4 is communicated herewith via the channel 79 with the intake port 5.

FIG. Figure 3 shows another modification of the diaphragm valve, consisting of a valve box 21, in which a piston or a valve 22 is placed, which is under the action of pressure regulating fluid, connected to the diaphragm piston in one direction and under the action of a spring 24 in the other. In the valve box, a pin 25, which is stationary with respect to the spool 22, which enters the constriction 26 arranged in the channel 27, is obstructed. Therefore, the latter is cleared when the piston 22 moves. 2 and 3, the rod is easily removed and can be installed externally to the desired position relative to the channel.

FIG. 4 shows a modification of the valve in which the rod can move in the same manner as in the device of FIG. 1. 2 / - valve box, 23 - a membrane that is under pressure from a fluid and a spring 24. By means of the clamp 33, the membrane is fastened to the spindle, by the movement of which the valve is moved. The stem 25, which is included in the restriction 26, is fastened to the shoulder 20, which follows the movement of the membrane.

FIG. 5 shows a rod that has a non-cylindrical shape, as in FIG. 1-4. and it is equipped with circular notches, thanks to which the best separation and removal of sewage settling in the constricted part is achieved.

FIG. 6 shows a diaphragm valve with a tapered rod 25; due to its shape, when the rod moves in the channel 26, the cross-section of the constriction changes. When the rod is lifted, the through-hole increases and a large amount of liquid flows into the space under the membrane, which is why the pressure in this space increases. With this shape of the rod, it is possible to compensate for the spring tension increasing with the lifting of the membrane and, with a certain pressure variation in the controlled system, to achieve a more significant displacement of the membrane and, consequently, greater control sensitivity. If the rod is shaped like a cone tapering in the other direction, it is possible to achieve looser regulation, which is desirable in some cases when there are sudden fluctuations in the controlled system.

FIG. 7 shows a regulator arranged according to the present invention. As applied to this device, the following describes the operation of individual parts of the controller. In valve 35, a valve 36 is located, the regulation of which must be carried out in such a way that the pressure in the channel behind the valve remains constant. Pov

g

By means of a circuit 37 with a counterweight 38, the valve 36 is driven by a servomotor 39 operating by means of fluid pressure. The servomotor consists of a cylinder 40 in which a piston 4 is placed with a brush 42. The flow of working fluid into the servomotor and its output are controlled by a valve 22 sitting in the valve box 21, depending on the oscillations in the controlled system. A constriction 26 with a stem 25 is arranged in the spool 22, similar to that, as shown in FIG. 3

In order to prevent larger foreign bodies in the liquid from falling into the passage channel 26, between the latter and the inlet channel 43 there is an interface 60 consisting of filter cloth. The filter is connected to the spool 22.

The working fluid 1 is introduced into the valve box 27 through the inlet pipe 43, and is discharged therefrom through the pipe 44. The position of the spool 22 is controlled by the spring 24 and the fluid pressure in the space 45 above the membrane 23. The space 45 into which the working fluid is continuously fed through the restriction 26 It communicates via channel 46 with relay 47. The pressure in channel 35 acts through pipe 48 on the fur 49, which is in conjunction with the lever 50. under the action of the spring 51, and acting in such a way that in an adjustable system as it approaches or moves away from the nozzle outlet 52.

The normal action of the regulator is as follows: when the pressure behind the valve rises, the fur 50 pushes the lever 50 up a little, and the flow of liquid from the nozzle increases, as a result of which the pressure in chamber 45 drops; spring 24 pushes back spool 22 upwards, so that the working fluid flows out of the servomotor. From this, and under the action of the counterweight 38, the valve 36 closes and the desired pressure is established behind the valve.

Conversely, if the pressure behind the valve has dropped slightly, then the lever 50

is pulled down by the spring 57 downwards, as a result of which the outflow of fluid from the nozzle 52 is subject to some deceleration. From this, the pressure in chamber 45 rises, since the fluid inflow into it remains approximately constant; As a result, zoon-22 is pushed down; A new amount of fluid will enter the servomotor through the intake port 43, causing the servomotor piston 41 to lower and some opening of the valve 36, as a result of which the pressure behind the valve again increases.

SUBJECT OF THE PATENT.

1. The distributor to the servomotor servicing the regulating device, the distributor body of which is under the action of a spring and a membrane, a pressure fluid, characterized by the attachment of a pin 10 (Fig. 1 and 2) OR 25 (Fig. 3, 4 and 7) moving in the hole 8 (Fig. 1 and 2) or 26 (Fig. 4) when moving the distributor body through which the liquid enters the membrane chamber 3, from which it flows through the narrowed opening, covered by a special body (relay) depending on the controlled system (Fig .7).

2. Alteration of the distributor described in paragraph 1, characterized in that the above-mentioned pin 10 (Fig. 1) or 25 (Fig. 4) is provided with circular notches (Fig. 5).

3. Alteration of the distributor described in paragraph 1, characterized in that the above pin (Fig. 6) has a conical shape.

Typography: “Red Printer, Pvnlsrad, International, 15.