阅读说明：本技术 一种基于海上平台阀门定位器的智能pst测试装置 (Intelligent PST testing device based on offshore platform valve positioner ) 是由 张宝龙 曲波 庄仁选 姜碧波 王进 于 2021-09-07 设计创作，主要内容包括：本发明公开了一种基于海上平台阀门定位器的智能PST测试装置,包括执行气缸,所述执行气缸伸出上端面的气缸转动轴端部固定设置有磁力块,执行气缸的上端面固定设置有立体的固定支架,执行气缸的侧面设置有气路控制面板；所述固定支架上端面固定设置有定位器和限位开关,定位器用于与中控系统进行信号传输；所述限位开关底端伸出的开关转动轴转动连接有连杆结构,连杆结构与磁力块相转动连接。本发明旨在提供一种能够实时监测避免SDV阀门出现粘连卡死的情况,同时提高测试有效性和安全性的海上平台阀门定位器的智能PST测试装置。(The invention discloses an intelligent PST testing device based on a marine platform valve positioner, which comprises an execution cylinder, wherein a magnetic block is fixedly arranged at the end part, extending out of the upper end face, of a cylinder rotating shaft of the execution cylinder; the upper end face of the fixed support is fixedly provided with a positioner and a limit switch, and the positioner is used for signal transmission with a central control system; the switch rotating shaft extending out of the bottom end of the limit switch is rotatably connected with a connecting rod structure, and the connecting rod structure is rotatably connected with the magnetic block. The invention aims to provide an intelligent PST testing device of a valve positioner of an offshore platform, which can monitor and avoid the condition that an SDV valve is stuck and stuck in real time and improve the testing effectiveness and safety.)

1. The utility model provides an intelligence PST testing arrangement based on marine platform valve locator, includes actuating cylinder (4), its characterized in that: a magnetic block (8) is fixedly arranged at the end part of a cylinder rotating shaft (7) of the execution cylinder (4) extending out of the upper end face, a three-dimensional fixed support (3) is fixedly arranged on the upper end face of the execution cylinder (4), and a gas circuit control panel (5) is arranged on the side face of the execution cylinder (4); the upper end face of the fixed support (3) is fixedly provided with a positioner (1) and a limit switch (2), and the positioner (1) is used for signal transmission with a central control system; a switch rotating shaft (10) extending out of the bottom end of the limit switch (2) is rotatably connected with a connecting rod structure (9), and the connecting rod structure (9) is rotatably connected with the magnetic block (8); the gas circuit control panel (5) comprises a gas control valve (51), a flow amplifier (52), an electromagnetic valve (53), a filtering and reducing valve (54), a first push-pull valve (56) and a second push-pull valve (57), the filtering and reducing valve (54) is respectively communicated with the flow amplifier (52), the electromagnetic valve (53) and the second push-pull valve (57) through a four-way pipe and a gas circuit, the electromagnetic valve (53) and the second push-pull valve (57) are both communicated with the first push-pull valve (56) through the gas circuit, the first push-pull valve (56) is communicated with the gas control valve (51) through the gas circuit, and the gas control valve (51) is communicated with the flow amplifier (52); the filtering pressure reducing valve (54) is communicated with an air source; the positioner (1) is connected with a central control system through a circuit, and the positioner (1) is connected with a flow amplifier (52) through a gas circuit.

2. The intelligent PST testing device based on the offshore platform valve positioner as claimed in claim 1, wherein: a three-way pipe is arranged between the filtering and pressure reducing valve (54) and the four-way pipe, and a proportional unloading valve (55) is connected on the three-way pipe.

3. The intelligent PST testing device based on the offshore platform valve positioner as claimed in claim 1, wherein: the magnetic block (8) is annular, and the magnetic block (8) is fixedly sleeved at the end part of the cylinder rotating shaft (7).

4. The intelligent PST testing device based on the offshore platform valve positioner as claimed in claim 1, wherein: the central control system is composed of a central control intelligent instrument management system, and the central control system controls the opening of the valve through ValveLink software.

5. The intelligent PST testing device based on the offshore platform valve positioner as claimed in claim 1, wherein: the positioner (1) is composed of a DVC6200SIS positioner, and the limit switch (2) is composed of a TOPWORX limit switch.

Technical Field

The invention relates to the technical field of valve detection, in particular to an intelligent PST testing device based on a valve positioner of an offshore platform.

Background

The petroleum industry is used as the industry with high risk of working environment, and the characteristics of safety accidents of the petroleum industry are determined by the industrial characteristics. The actuating mechanism of the SDV valve drives the valve to be opened or closed through the force of the internal spring and the cylinder, when the air pressure of the cylinder is smaller than the spring pressure, the valve can be closed under the action of the spring force, and when the air pressure of the cylinder is larger than the spring pressure, the valve can be opened under the action of the air pressure of the cylinder. Because the SDV valve of the traditional offshore platform is in a static state in the using process, the SDV valve can only act when a pipeline needs to be cut off urgently when a process is abnormal or can act when the pipeline is stopped for maintenance, the valve is kept in a static state for a long time, the valve can be adhered and clamped under the operating condition, and the production efficiency of the petroleum industry is seriously influenced. In addition, the effectiveness test of the existing valve can only be carried out in a manual mode, and potential safety hazards exist. The opening and closing of the SDV valve are manually operated, and the opening degree cannot be accurately controlled. Therefore, the intelligent PST testing device of the offshore platform valve positioner is urgently needed, the condition that the SDV valve is stuck and blocked due to adhesion can be monitored and avoided in real time, and the testing effectiveness and the testing safety are improved.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide an intelligent PST testing device for a valve positioner of a marine platform, which can monitor and avoid the SDV valve from being stuck in real time and improve the testing effectiveness and safety.

In order to achieve the purpose, the invention is realized by the following technical scheme:

an intelligent PST testing device based on a marine platform valve positioner comprises an execution cylinder, wherein a magnetic block is fixedly arranged at the end part, extending out of the upper end face, of a cylinder rotating shaft of the execution cylinder, a three-dimensional fixed support is fixedly arranged on the upper end face of the execution cylinder, and a gas circuit control panel is arranged on the side face of the execution cylinder; the upper end face of the fixed support is fixedly provided with a positioner and a limit switch, and the positioner is used for signal transmission with a central control system; the switch rotating shaft extending out of the bottom end of the limit switch is rotatably connected with a connecting rod structure, and the connecting rod structure is rotatably connected with the magnetic block; the gas circuit control panel comprises a gas control valve, a flow amplifier, an electromagnetic valve, a filtering pressure reducing valve, a first push-pull valve and a second push-pull valve, the filtering pressure reducing valve is respectively communicated with the flow amplifier, the electromagnetic valve and the second push-pull valve through a four-way pipe and a gas circuit, the electromagnetic valve and the second push-pull valve are both communicated with the first push-pull valve through the gas circuit, the first push-pull valve is communicated with the gas control valve through the gas circuit, and the gas control valve is communicated with the flow amplifier; the filtering pressure reducing valve is communicated with an air source; the positioner is connected with the central control system through a circuit and is connected with the flow amplifier through a gas circuit.

Furthermore, a three-way pipe is arranged between the filtering and pressure reducing valve and the four-way pipe, and a proportional unloading valve is connected to the three-way pipe.

Furthermore, the magnetic block is annular and is fixedly sleeved at the end part of the rotating shaft of the cylinder.

Furthermore, the central control system is composed of a central control intelligent instrument management system, and the central control system controls the opening of the valve through ValveLink software.

Further, the positioner is composed of a DVC6200SIS positioner, and the limit switch is composed of a TOPWORX limit switch.

Compared with the prior art, the invention has the following beneficial effects:

the invention is arranged on the execution cylinder of the SDV valve and can detect the SDV valve in real time. Through the equipment combination of locator, limit switch, gas circuit control panel, ensure that SDV valve itself is in healthy state, the SDV valve can quick response when guaranteeing that emergency shut-off appears in the production flow, in time cut off the pipeline flow, avoid influencing production and the potential safety hazard appears. The positioner is used for receiving an electric signal of the central control system and converting the electric signal into an air source signal to be output to the flow amplifier, the flow amplifier adjusts the air source pressure output to the execution cylinder according to the air source signal, the execution cylinder drives the SDV valve to rotate, and the positioner detects the rotation angle of the SDV valve in real time in the whole process, so that the test of the partial stroke of the remote automatic PST is realized, the condition that the SDV valve is stuck and stuck is avoided, and the test effectiveness and the test safety are improved. The SDV valve can be changed from a remote automatic mode to a manual mode by adjusting the pulling-up and pushing-down states of the first push-pull valve and the second push-pull valve.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a connecting structure of a connecting rod structure, a cylinder rotating shaft and a switch rotating shaft according to the present invention;

FIG. 3 is a schematic structural view of the gas circuit control panel according to the present invention;

FIG. 4 is a schematic diagram of the system of the gas circuit control panel in the remote automatic mode according to the present invention;

FIG. 5 is a schematic diagram of a system for controlling the open state of an SDV valve in a manual mode according to the present invention;

FIG. 6 is a schematic diagram of the system of the present invention with the air circuit control panel in the SDV valve closed state in the manual mode.

Reference numerals:

1-a positioner, 2-a limit switch, 3-a fixed support, 4-an execution cylinder, 5-a gas path control panel, 6-a gas source, 7-a cylinder rotating shaft, 8-a magnetic block, 9-a connecting rod structure, 10-a switch rotating shaft, 51-a pneumatic control valve, 52-a flow amplifier, 53-an electromagnetic valve, 54-a filtering pressure reducing valve, 55-a proportional unloading valve, 56-a first push-pull valve and 57-a second push-pull valve.

Detailed Description

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1 to 6, the intelligent PST testing device based on the offshore platform valve positioner comprises an execution cylinder 4, wherein a magnetic block 8 is fixedly arranged at the end part of a cylinder rotating shaft 7, which extends out of the upper end face of the execution cylinder 4, a three-dimensional fixed support 3 is fixedly arranged on the upper end face of the execution cylinder 4, and a gas circuit control panel 5 is arranged on the side face of the execution cylinder 4; the upper end face of the fixed support 3 is fixedly provided with a positioner 1 and a limit switch 2, and the positioner 1 is used for signal transmission with a central control system; a switch rotating shaft 10 extending out of the bottom end of the limit switch 2 is rotatably connected with a connecting rod structure 9, and the connecting rod structure 9 is rotatably connected with the magnetic block 8; the gas circuit control panel 5 comprises a gas control valve 51, a flow amplifier 52, an electromagnetic valve 53, a filtering and reducing valve 54, a first push-pull valve 56 and a second push-pull valve 57, the filtering and reducing valve 54 is respectively communicated with the flow amplifier 52, the electromagnetic valve 53 and the second push-pull valve 57 through a four-way pipe and a gas circuit, the electromagnetic valve 53 and the second push-pull valve 57 are both communicated with the first push-pull valve 56 through the gas circuit, the first push-pull valve 56 is communicated with the gas control valve 51 through the gas circuit, and the gas control valve 51 is communicated with the flow amplifier 52; the filtering pressure reducing valve 54 is communicated with a gas source; the positioner 1 is connected with a central control system through a circuit, and the positioner 1 is connected with a flow amplifier 52 through a gas circuit; the positioner 1 is composed of a DVC6200SIS positioner, and the limit switch 2 is composed of a TOPWORX limit switch.

Wherein, a three-way pipe is arranged between the filtering pressure reducing valve 54 and the four-way pipe, and the three-way pipe is connected with a proportional unloading valve 55. The proportional unloading valve 55 is used for avoiding the generation of overlarge back pressure in the pneumatic control loop when the pressure relief of the air cylinder 4 is executed, ensuring the stability of an air source in the pneumatic control loop and simultaneously protecting the safety of components in the pneumatic control loop.

The central control system is composed of a central control intelligent instrument management system, and the valve opening degree is controlled by the central control system through ValveLink software. During use, AO and AI control points can be added in the central control system to form a control closed loop, off-line and on-line diagnosis can be satisfied, and real-time valve position travel is fed back to the central control system, so that stepless control of the opening degree of the SDV valve is realized, and the adaptability and the safety are stronger.

When the air pressure control device is used, the execution cylinder 4 is connected with the SDV valve for use, wherein the air path control panel 5 controls the execution cylinder 4 to act by controlling the pressure of an output air signal, the end part of a cylinder rotating shaft 7 of the execution cylinder 4 is fixed with a magnetic block 8, and the magnetic block 8 synchronously rotates when the SDV valve rotates. The magnetic block 8 is connected with the positioner 1 through magnetic force, the switch rotating shaft 10 of the limit switch 2 is connected with the magnetic block 8 through the connecting rod structure 9, and after the execution cylinder 4 obtains a gas signal given by the gas circuit control panel 5, the cylinder rotating shaft 7 is pushed to rotate. The positioner 1 converts the rotation angle of the magnetic block 8 into an electric signal, outputs the electric signal and feeds the electric signal back to the central control system, the rotation angle of the valve can be displayed in the central control system, and the cylinder rotation shaft 7 is the rotation shaft of the SDV valve, so that the positioner 1 determines the rotation angle of the SDV valve through the rotation angle of the magnetic block 8 along with the cylinder rotation shaft 7, and remote automatic control and monitoring are met. Meanwhile, a connecting rod structure 9 connected with a switch rotating shaft 10 and a magnetic block 8 perform synchronous rotating action, the rotating position of the SDV valve can be directly observed on site through a limit switch 2, the site manual control and monitoring are met, and the purpose of simultaneously monitoring the rotating angle of the SDV valve with a central control system on site and in real time is achieved.

The invention has remote automatic and field manual modes in the SDV valve PST test function.

Fig. 4 is a schematic diagram of the system of the pneumatic control panel 5 in the remote automatic mode. In the remote automatic mode, the first push-pull valve 56 is in the AUTO position, i.e., pulled up. The second push-pull valve 57 is in a bypass, the test function of the remote automatic PST is started, and the field manual switch function is not available.

When the electromagnetic valve 53 is de-energized, the air path is closed, the air control valve 51 is not triggered, no air source enters the execution cylinder 4, and the SDV valve is closed.

When the electromagnetic valve 53 is powered on, the gas circuit is conducted, the gas source sequentially passes through the filtering pressure reducing valve 54, the electromagnetic valve 53 and the first push-pull valve 56 to trigger the pneumatic control valve 51, the central control system outputs a PST trigger signal to the positioner 1 according to the real-time position of the valve, the trigger signal is an AO electric signal of 4-20mA, the positioner 1 converts the received PST trigger signal into a gas source signal through an internal processor and outputs the gas source signal to the flow amplifier 52, the flow amplifier 52 regulates the gas source pressure output to the execution cylinder 4 according to the received gas source signal, the gas source with the regulated pressure enters the execution cylinder 4 through the pneumatic control valve 51, the execution cylinder 4 slowly drives the SDV valve to rotate, in the process, the positioner 1 monitors the rotation angle of the SDV valve in real time, and adjusts the gas source signal of the flow amplifier 52 according to the real-time position, and therefore the remote automatic PST stroke test is achieved.

In the process of testing the remote automatic PST stroke, if an emergency occurs, for example, the SDV valve rotates beyond a predetermined angle, the positioner 1 outputs a maximum air source signal to the flow amplifier 52, so that the flow amplifier 52 boosts the air source input to the actuating cylinder 4 to a maximum pressure, and the valve is restored to a fully open state, thereby ensuring the safety and reliability of the test of the remote automatic PST stroke.

In the field Manual mode, the first push-pull valve 56 is in a Manual position, namely, a push-down state, the electromagnetic valve 53 is in a bypass state, the test function of the field Manual PST is started, and the remote automatic switch function is not provided.

Fig. 5 is a schematic diagram of the system in which the air circuit control panel 5 is in the open state of the SDV valve in the manual mode. At the moment, the second push-pull valve 57 is in an Open position, namely, in a pulling state, the gas circuit is conducted, the gas source sequentially passes through the filtering and reducing valve 54, the second push-pull valve 57 and the first push-pull valve 56 to trigger the gas control valve 51, the gas source enters the execution cylinder 4 after being pressurized by the flow amplifier 52, the pressure of the gas of the cylinder is greater than the internal spring force of the SDV valve, and the SDV valve is in an Open state.

Fig. 6 is a schematic diagram of the system in which the air circuit control panel 5 is in the SDV valve closed state in the manual mode. The second push-pull valve 57 is in a Close position, namely, a push-down state, the gas circuit is closed, the gas control valve 51 does not trigger gas, no gas source enters the execution cylinder 4, the SDV valve is gradually closed under the action of internal spring force, in the closing process of the SDV valve, a field operator judges the rotation angle of the valve by observing the state of a link mechanism of the limit switch 2, when a preset angle is reached, the second push-pull valve 57 is pushed and pulled to an Open position, namely, a pull-up state, the gas circuit is conducted, the gas source enables the gas control valve 51 to trigger again, the gas source enters the execution cylinder 4 after being pressurized by the flow amplifier 52, the gas pressure of the cylinder is greater than the internal spring force of the SDV valve, and the valve is gradually opened to the maximum, so that the test of the field manual PST stroke is realized.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.