RU194379U1 - SYSTEM OF HYDRAULIC STABILIZATION OF POSITION OF BLOCK-AND-CONTROLLING VALVES WITH ELECTROMAGNETIC DRIVE - Google Patents

Abstract

The utility model relates to mechanical engineering, in particular, to shut-off and control pipe fittings designed to shut off and control the flow of a passing medium, and can be used in the development of actuators for gate valves. The objective of the proposed utility model is to create a device that allows to expand the boundaries of the use of electromagnetic actuators which allows the use of electromagnetic drives not only in valves, but also in valves and fittings. Technical result: precise control of passage th gate section, therefore, the regulation of the volume of the medium flowing through the truboprovodu.Tehnichesky result is achieved the proposed hydraulic system stabilization of valves. The cylinder body with a solid bottom and a cavity, subdivided into two parts: the upper A and lower B, is closed by a cover, a rod with a piston mounted on it is located inside the body, the piston diameter is equal to the diameter of the hydraulic cylinder cavity. The piston actually divides the cavity of the hydraulic cylinder into upper A and lower B parts. Four control shutoff solenoid valves are installed on the body. Glands are installed on the cover and the cylinder body; the cover and the cylinder case are bolted. The walls of the cylinder body are vertically cut by channels for the fluid flow communicating with the upper A and lower B parts of the cylinder cavity. At the same time, four control shutoff solenoid valves are installed in the places where the channels communicate with the hydraulic cylinder cavity. Channels are closed by caps.

Description

The utility model relates to mechanical engineering, in particular to shut-off and control pipe fittings designed to shut off and control the flow of a passing medium, and can be used in the development of actuators for gate valves.

Several types of actuators for controlling valves are known: hydraulic and pneumatic actuators, electric drives, electromagnetic drives.

The main disadvantages of hydraulic and pneumatic actuators are the significant complexity of their manufacture, the complexity of the design and significant overall dimensions, especially diametrical, the need for pumping stations and many different power and control pipelines, and their connections.

The main disadvantages of valves with electric drives is the need to use all kinds of gears, whether planetary or worm gears, screw-nut systems, or some other. All of them are subject to mechanical wear, leading to the appearance of "backlashes" and inaccuracies in regulating the flow of a passing medium.

Electromagnetic drives have several advantages over pneumatic, hydraulic and electric drives:

- Simplicity of design;

- Lack of mechanisms subject to mechanical wear;

- There is no need for the use of pumping stations and many power and control pipelines, and their connections;

- Significantly smaller overall dimensions.

Electromagnetic drives, for all their manufacturability during production and operation, with small dimensions and the practical absence of parts subject to wear, have limited technological capabilities for use.

The reason for the limited technological capabilities of known electromagnetic actuators, for example, according to the patent of the Russian Federation No. 2266456, is the lack of means for fixing the valve in intermediate positions, that is, the inability to control the valve cross-section.

The objective of the proposed utility model is to create a device that allows you to expand the boundaries of the use of electromagnetic drives, which will allow the use of electromagnetic drives not only in valves, but also in valves.

EFFECT: exact regulation with the help of the proposed device of the valve cross-section, therefore, regulation of the volume of medium passing through the pipeline.

The technical result is achieved by the proposed system of hydraulic stabilization of the position of shut-off and control valves, which includes a hydraulic cylinder having a housing, the walls of which are vertically cut by channels connecting the upper and lower parts of the hydraulic cylinder cavity to regulate the fluid flow with plugs, the housing is closed by a bolt cap with gaskets , inside the hydraulic cylinder body there is a rod with a piston mounted on it, the piston diameter is equal to the diameter of the hydraulic cylinder cavity, the guide is on four control shutoff solenoid valves are installed in the places of communication of the channels for regulating the fluid flow with the cavity of the hydraulic cylinder.

The utility model is illustrated by drawings:

In FIG. 1 shows a system of hydraulic stabilization of the position of valves in section.

In FIG. 2 shows the proposed system of hydraulic stabilization of the position of shut-off and control valves in combination with an electromagnetic actuator and shut-off and control valves, that is, an electrically-regulating valve as a whole (in a section).

The list of positions in the drawings:

1 - the body of the hydraulic cylinder;

2 - a cover of the hydraulic cylinder body;

3 - stock;

4 - the piston;

5, 6, 7, 8 - control shutoff solenoid valves;

9 - epiploons;

10 - bolts for connecting the cover and the cylinder body;

11 - channels for regulating the flow of fluid;

12 - stubs of channels;

13 - shut-off and control valves;

14 - the executive body of valves;

15 - anchor of a power electromagnet;

16 - power electromagnet;

17 - power spring of the electromagnetic drive;

A - the upper part of the cavity of the hydraulic cylinder;

B - the lower part of the cavity of the hydraulic cylinder.

The cylinder housing 1 with a solid bottom and a cavity, divided into two parts: upper A and lower B, is closed by a cover 2, inside the housing 1 there is a rod 3 with a piston 4 mounted on it, the diameter of which is equal to the diameter of the hydraulic cylinder cavity. The piston 4 actually divides the cavity of the hydraulic cylinder into upper A and lower B parts. Four control shut-off solenoid valves 5, 6, 7, 8 are installed on the housing 1. Glands 9 are installed on the cover 2 and the hydraulic cylinder housing 1, the cover and the hydraulic cylinder housing are connected by bolts 10. The walls of the hydraulic cylinder housing 1 are vertically cut by channels 11 for regulating the fluid flow, communicating with upper A and lower B parts of the cavity of the hydraulic cylinder. At the same time, four control shutoff solenoid valves 5, 6, 7, 8 are installed in the places of communication of channels 11 with the cavity of the hydraulic cylinder. Channels 11 are closed by plugs 12.

The system of hydraulic stabilization of the position of shut-off and control valves works as follows.

Initially, the liquid is poured into the holes in the bottom of the cylinder body 1 until the air is completely displaced from the hydraulic cylinder cavities and from the channels 11 (that is, until the liquid begins to pour out from the channels 11), then the channels 11 are closed with plugs 12.

The proposed system is installed on shut-off and control valves 13 in such a way as to ensure mechanical interaction of the lower end of the rod 3 with the reciprocal position of the actuator 14 of shut-off and control valves (as shown in Fig. 2). The upper end of the rod 3 has a design that allows for mechanical interaction with the armature 15 of the power electromagnet 16.

If it is necessary to increase the hydraulic resistance, therefore, to reduce the throughput of the valve (shut-off and control valves) by reducing the flow area of the throttle assembly, a command is sent from the control unit to open the control solenoid valves 5 and 6, as a result of which the fluid from cavity B passes into cavity A, rod 3 under the influence of the power spring 17 of the electromagnetic drive moves down, while the actuator 14 of the shut-off and control valves reduces the passage section s throttle knot. The difference in the speed of pressure reduction is provided by different speeds of movement of the rod 3, due to changes in the frequency and sequence of opening of the control solenoid valves 5 and 6.

After stabilizing the hydraulic resistance due to a change in the valve capacity due to a change in the orifice of the throttle assembly, the position of the control valve is fixed and remains unchanged due to the blocking of the hydraulic cylinder, due to the closure of all control shut-off solenoid valves 5, 6, 7, 8.

If it is necessary to reduce the hydraulic resistance, therefore, increase the throughput of the valve by increasing the flow area of the throttle assembly, a voltage is applied to the power electromagnet 16, as a result of which the armature 15, overcoming the resistance of the power spring 17, creates an upward traction force on the rod 3. After opening, command from the control unit of the control solenoid valves 7 and 8, the fluid from the cavity A passes into the cavity B, the rod 3 moves up, dragging the actuator 14 shut-off and control valves. The frequency and sequence of opening of the control solenoid valves 7 and 8 provides a different speed of movement of the rod 3, thereby setting the difference in speed of the set pressure.

The set of control electromagnetic valves allows you to control the movement of fluid between the upper A and lower B parts of the cavity of the hydraulic cylinder, providing fluid movement if necessary and adjusting its speed, which determines the speed of opening or closing of the throttle assembly. The control unit software allows you to set various operating modes of shut-off and control valves, both on the basis of data on the state of the working medium “before you” and “after yourself”, and on the basis of data on the position of the actuator of the shut-off and control valves according to data from the position sensor .

The hydraulic stabilization system of valves with an electromagnetic drive will work as part of any production lines that have a digital control signal. This system can be applied to shut-off and control valves. Having a digital signal from the control system, the hydraulic position stabilization system will be able to control shut-off valves to control the pressure, temperature, volume and flow rate of the medium.

Claims (1)

The system of hydraulic stabilization of the position of shut-off and control valves, including a hydraulic cylinder having a body, the walls of which are vertically cut by channels connecting the upper and lower parts of the hydraulic cylinder cavity with regulating plugs, the hydraulic cylinder case is closed by a cover with gaskets with bolts, the rod is located inside the hydraulic cylinder case with a piston mounted on it, the diameter of the piston is equal to the diameter of the cavity of the hydraulic cylinder, on the hydraulic cylinder body in the places of communication of the channels for regulators To control the fluid flow with the hydraulic cylinder cavity, four control shut-off solenoid valves are installed.

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