RU2643785C1 - Control unit of passive pipeline protection system - Google Patents

Abstract

FIELD: machine engineering.

SUBSTANCE: control unit of the passive pipeline protection system contains a tank connected to the pipeline to be protected and a non-return valve. The container, connected to the pipeline to be protected is divided movably hermetically into two cavities, one connected to the pipeline to be protected. The other two lines with the capacity of the accumulator with a variable volume, serving as a drain. One line is connected directly through the non-return valve, and the second line through the control mechanism and the hydraulic drive of the pipeline valves, through the hydraulic cylinder of the hydraulic accumulator, thus forming a closed loop filled with working fluid.

EFFECT: invention makes it possible to improve the reliability of the control of the passive protection of pipelines.

2 cl, 3 dwg

Description

The invention relates to mechanical engineering, namely to valve engineering, specifically to reinforcing safety devices, and can be applied in the protection of various process pipelines, including nuclear power plants, oil and gas pipelines, heat and water supply.

The control unit for the passive protection system of pipelines is known (see TPA Magazine No. 3-2016, pp. 62-63 "Again on Spills and Geysers," by V.P. Eismont), containing pipe fittings controlled by a hydraulic cylinder associated with a custom to a certain pressure drop by a membrane control mechanism with a spring adjuster.

The disadvantages of the known design include low reliability due to the presence of possible failures when working on "dirty" environments with mechanical impurities.

The valve control unit for protecting pipelines is also known (see Phone Ling Chin “Passive actuators of emergency action on reactivity and cooling of active zones of nuclear power plants.” Thesis for the degree of candidate of technical science, pp. 103-105, scientific adviser Professor R.R. Ionaitis, Moscow, 2009; and TPA Magazine No. 4-2014, pp. 19-20), a prototype containing a container (receiver) connected to a protected pipeline with it installed electromagnetic distributors supplying the medium to the drive and dumping it into tmosferu and check valves installed in the feed line to the tank circuit of the control fluid or from a suitable source.

The disadvantages of the known design include low reliability due to the inability to operate the system in the absence of electricity due to the presence of electromagnetic distributors in the unit, as well as the presence of discharge of the medium into the atmosphere, which is not permissible for each type of control medium.

The technical problem solved by the present invention is to increase the reliability of the control unit of the passive protection system of pipelines.

The problem is solved in that the control unit of the passive protection system of pipelines, containing a container connected to the protected pipeline, and a check valve, while the container connected to the protected pipeline is movably sealed in two cavities, one connected to the protected pipeline and the other two by lines with a variable capacity hydraulic accumulator tank acting as a drainage, one line is connected directly through a non-return valve, and the second line is connected through a control mechanism, a hydraulic pipeline fittings and through the hydraulic accumulator cylinder, forming a closed loop filled with working fluid, while the accumulator contains a hydraulic cylinder kinematically connected via a linkage mechanism to a controlled weight adjuster.

In FIG. 1 shows a diagram of a control unit for a passive protection system for pipelines under process pressure (a controlled shutoff of pipeline valves (TPA) is open);

In FIG. 2 shows a diagram of the control unit of the passive protection system for pipelines with reduced process pressure (TPA controlled shutter is closed);

In FIG. 3 shows a diagram of the control unit of the passive protection system of pipelines with no technological pressure in the pipeline (TPA controlled shutter is closed).

The passive protection system control system for pipelines consists of a tank 1, which is hermetically sealed by a disk 2 into two cavities, the lower cavity 3 is connected to a protected pipeline 4, in which an actuator 5 is installed (shut-off or shut-off TPA controlled by a hydraulic actuator with a setting mechanism), and the upper cavity 6, connected by two parallel lines with a capacity 7 of the accumulator 8, while one line 9 is connected directly and is equipped with a check valve 10, and the other line 11 through the actuator adjustment mechanism nism 5, hydraulic cylinder 12, a mechanism kinematically coupled with a lever mechanism 13 controlling the weighting type setter 14, located inside the tank 7 and sealingly cooperating with a movable plate 15, forming a cavity 16 that performs drainage role.

The initial position of the control unit of the passive protection system of pipelines (without using any energy other than the energy of the medium).

The pipeline 4, the cavity 3 of the tank 1 are under technological pressure. In this case, the entire circuit, consisting of a cavity 6, tank 1, line 9 to the check valve 10, line 11, actuator 5, hydraulic cylinder 12 and cavity 16 of tank 7, is filled with a working fluid in a state balanced with the process pressure.

When the technological pressure in the pipeline 4 is reduced to the calculated one set by the tuning mechanism in the actuator 5, the latter is activated and the TPA shutter closes the pipeline 4 and the working fluid (it can be water with ingredients, industrial oil, non-freezing fluid, etc.) along line 11 into the cavity 16 of the tank 7, lifting the disk 15 to the setter 14.

To eliminate the problems that caused a decrease in pressure in the protected process pipe 4, the pressure is reduced to atmospheric pressure, while the calculated weight of the setter 14 of the lever mechanism 13 affects the disk 15 under its own weight, through the check valve 10, line 9 and line 11 from the hydraulic cylinder 12 moves the working fluid into the cavity 6 of the tank 1, while the shutter TPA actuator 5 remains closed.

With a subsequent increase in pressure in the process pipe 4, the disk 2 moves the working fluid from the cavity 6 through lines 11 through the adjustable mechanism of the actuator 5 to the hydraulic actuator TPA and hydraulic cylinder 12 of the hydraulic accumulator 8, thereby opening the valve TPA actuator 5 and raising the adjuster 14. The system control unit passive protection of pipelines ready to go.

Thus, due to the fact that the TPA hydraulic actuator with the setting mechanism is closed in a single circuit with a reservoir interacting through a movably-sealed disk with a conducted medium and a reservoir accumulator acting as a drain, it increases not only the reliability of the unit, but also increases the degree of environmental security.

Claims (2)

1. The control unit of the system of passive protection of pipelines, containing a tank connected to the protected pipeline, and a check valve, characterized in that the tank connected to the protected pipeline is movably sealed in two cavities, one connected to the protected pipeline, and the other two lines with the capacity of the hydraulic accumulator with a variable volume, acting as a drainage, while one line is connected directly through a non-return valve, and the second line through a control mechanism and hydraulic actuator of the pipe fittings, through the hydraulic accumulator cylinder, while forming a closed loop filled with working fluid. 2. The control unit of the passive protection system of pipelines according to claim 1, characterized in that the accumulator comprises a hydraulic cylinder kinematically connected via a linkage mechanism to a weight-controlled controlled setter.

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