RU2815570C1 - Mechanism for indicating required position of shut-off valves corresponding to operating mode of control system - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention relates to control of operating modes of shutoff and control valves for pipelines and can be used for local control of technological processes at chemical, petrochemical, oil refining and other industries. Mechanism for indicating the required position of the shut-off valves corresponding to the operating mode of the control system includes a handle for selecting operating modes, which are located on the front panel of the housing of the mechanism, shut-off valve position control handles, information windows for displaying color and/or text indicators of the shut-off valve position applied to the movable indication plates, located behind the front panel and kinematically connected to the operating mode selection handle.

EFFECT: invention is aimed at enabling operation of the indication mechanism in a wider climatic range (temperature, humidity, aggressive environment), in its simplification due to absence of electronic devices and software, and as a result, higher reliability and maintainability in field conditions.

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Description

The invention relates to mechanical engineering, namely to the field of control of operating modes of shut-off and control valves for pipelines, for example gate valves, ball and/or needle valves, and can be used for local control of technological processes at chemical, petrochemical, oil refining and other production facilities.

An indication and control unit for organizing security systems and a device for organizing security systems are known, including a panel made of plastic, at least one pusher and a plate, wherein the plate is made opaque from sheet material, having at least one window made to transmit light from the light indicators, and at least one convex area for pressing, allowing you to act on the pusher, which is made to transmit this effect to the control button of the electronics board, and the panel is made containing at least n holes, where n is the total number of indicators and buttons of the device (see RF patent for PM No. 137144, IPC G08 B 19/00, published 01/27/1014).

A manual control unit is known (see RF patent for PM No. 142939, IPC G06F3/02, published on July 10, 2014), located in a housing, at the end of which there is a front panel with local control and indication elements included in the control and indication units of the unit , and containing a power supply unit, a control circuit switching unit, an analog input unit, a microcontroller unit with a self-diagnostic function and configured to connect with an external device via a digital interface, with inputs connected to control and analog input units, and outputs to indication and switching circuit units management.

A similar manual control unit is also known, in which the display elements are made on a four-digit seven-segment indicator, a linear indicator and indicator LEDs. The analog input unit is made on an analog-to-digital converter (see RF patent for PM No. 148913, IPC G05D3/00, published 12/20/2014). However, these devices belong to electronic process control systems, which complicates maintenance, requires additional explosion protection certification when used in aggressive environments, and also entails additional financial costs.

The technical problem lies in the development of a mechanical display device.

The technical result is to enable the display mechanism to operate in a wider climatic range (temperature, humidity, aggressive environment), to simplify it due to the absence of electronic devices and software, and, as a result, to increase reliability and maintainability in field conditions.

The problem is solved by the fact that the mechanism for indicating the required position of the shut-off valves, corresponding to the operating mode of the control system, includes a handle for selecting operating modes located on the front panel of the mechanism body, knobs for controlling the position of the shut-off valves, information windows for displaying color and/or text indicators of the position of the shut-off valves, printed on movable indicator plates located behind the front panel and kinematically connected to the operating mode selection handle.

The invention is illustrated by drawings, where in Fig. 1 shows a variant of the front panel of the inventive device for controlling the position of ball and needle valves; Fig. 2 – elements of the indication mechanism, in Fig. 3 – photo of the appearance of the proposed mechanism. Positions in the drawings indicate:

1 – front panel of the case;

2 – sectors of operating modes;

3 – handle for selecting operating modes;

4 – control knobs for the position of shut-off valves;

5 – information windows for shut-off valve position indicators;

6 – indicator plates;

7 – thrust;

8 – supporting panel;

9 – spacer;

10 – cylinder for sampling with two needle valves;

K1, K2, K3, K4, K5, K6 – marking of shut-off valve elements.

The display mechanism is a movable structure of interconnected elements. It contains a housing (not shown in Fig.), on the front panel 1 of which (Fig. 1, 3) sectors 2 operating modes of the indicated shut-off and control valve system are applied. They can be made in the form of text indicators of modes (for example, “pressure release”, “installation and removal of the cylinder”, “bypass loop”, “cylinder purge”, “sample taking”, “inert gas purge”). Under the sectors there is a handle 3 for selecting operating modes. Under the operating mode selection handle 3 there are vertical control handles 4 for the position of the shut-off valves. In the presented embodiment of the mechanism, these are four ball valves K1, K2, K3, K4 of the pipeline system and two needle valves K5, K6 of the sampling cylinder 10.

The control knobs 4 for the position of the shut-off valves are equipped with arrows indicating the corresponding position of the valves K1, K2, K3, K4, which is indicated by color in the information windows 5 located around the knobs. In particular for ball valve(s) these are round windows. For shut-off valves that do not have position indicators (needle valves K5, K6), one information window is used, for example, rectangular in shape. It displays information about the position of the needle valve with the inscription “open” or “closed” and the corresponding color indication.

The indication mechanism includes (Fig. 2) movable indicator plates 6 located in the housing and kinematically connected to the operating mode selection handle 3, for example by rods 7. In the given example, the indicator plates 6 are made in the form of disks located vertically with the ability to rotate around its axis. The control knobs for the position of the shut-off valves 4 are also located vertically, with each disk located on the same virtual axis with the corresponding knob for controlling the position of the shut-off valves. The disks are divided into sectors with different color and text information indicating the position of the valves. One indicator disk may contain information about the position of several locking elements or other devices.

In the process of moving the mode selection handle 3, the indicator plates (disks) 6 move, resulting in a combination of a certain sector on the indicator disk and information windows 5. The corresponding indication (sectors of different colors and inscriptions) is reflected in windows 5.

The number of handles 4 and indicator plates 6 is determined by the number of shut-off valves with position indicators. Information disks 6, the handle of the indication mechanism 3 and the control handles for the position of the shut-off valves 4 are fixed on the supporting panel 8 through a spacer 9. The indicator plates 6 are connected to the handle for selecting modes 3 of the indicated system and the position of the shut-off valves and are controlled by it. The transmission of torque is carried out using two rods 7 located on both sides of the handle and indicator disks.

The device works as follows.

The operating mode selection handle 3 is controlled by the operator, setting it to different positions depending on the operating mode that needs to be implemented. After selecting the position of handle 3, information about the position of each locking and control element appears in windows 5 of the front panel. After the information appears, the operator transfers the shut-off and control elements K1-K4 according to the information in the windows 5 of the front panel using the control knobs for the position of the shut-off valves 4.

The essence of the indication mechanism is to perform an auxiliary function (hint) to the operator in what position it is necessary to set the control knobs for the position of the shut-off valves after selecting the operating modes of the control system. Each mode in the process of working with the control mechanism corresponds to a certain position of the valve handles, and the indication system “highlights” their correct position in each of these modes, which reduces the likelihood of operator errors.

Claims (2)

1. A mechanism for indicating the required position of the shut-off valves, corresponding to the operating mode of the control system, characterized by the fact that it includes a handle for selecting operating modes, knobs for controlling the position of the shut-off valves, information windows for displaying color and/or text indicators of the position of the shut-off valves located on the front panel of the mechanism body , printed on movable indicator plates located behind the front panel and kinematically connected to the operating mode selection handle. 2. The mechanism according to claim 1, characterized in that the indicator plates are made in the form of disks located vertically with the ability to perform rotational movement around their axis and located on the same virtual axis with the corresponding control knob for the position of the shut-off valves.