Shut-off valve control system

Abstract

The utility model discloses a shut-off valve control system which comprises a first electromagnetic valve used for controlling a shut-off valve to be opened or closed through supply or release of a driving air source and further comprises a bypass module connected with the first electromagnetic valve in parallel and a control module connected with the bypass module in parallel, and under the control of the control module, the bypass module is switched on when receiving a signal of reproducing after shutdown in an unmanned mode. The bypass module and the control module which are connected with the first electromagnetic valve in parallel are additionally arranged, so that the bypass module is switched on when the bypass module receives a reproduction signal after the control module is switched off in the unmanned mode, and the electromagnetic valve control function of the unmanned mode is additionally arranged on an original shut-off valve control system of the manned mode; the shut-off valve is remotely controlled to be shut down to recover production through the bypass module and the control module in the unmanned mode, and the control problem of the shut-off valve in the unmanned mode is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of shutoff valves, in particular to a shutoff valve control system. Background Art

[0002] Shut-off valve (SDV valve for short) is an important safety device in offshore process flow, generally composed of actuator and ball valve body. Shut-off valve is generally installed on the inlet or outlet pipeline of container or equipment. Figure 1 This is the logic structure diagram of the control system of a conventional shut-off valve. The shut-off valve is an automatic control valve with only two positions: fully open and fully closed. It is also called a two-position valve. Common shut-off valves at sea are generally controlled by a 24V solenoid valve to drive compressed air to realize valve opening and closing. The 24V power supply of the solenoid valve is generally controlled by the emergency shutdown system (ESD) according to the shutdown logic. Figure 1 As shown, the solenoid valve has a mechanical self-locking function. In normal production, the solenoid valve of the shut-off valve is energized and the shut-off valve is in the fully open position. In abnormal production, the solenoid valve of the shut-off valve loses power, the power-driven gas source is released, and the shut-off valve is closed. When the solenoid valve loses power and acts, if it is powered on again, the solenoid valve still cannot act. Personnel are required to reset the mechanical locking mechanism on site to achieve the ventilation state of the solenoid valve. This design mainly ensures that after the shut-off valve is shut down, if the on-site monitoring means are insufficient, the operator needs to confirm the status on site, and only when safety is guaranteed can the shut-off valve be manually reset on site to achieve production recovery operation.

[0003] Figure 2 This is a schematic diagram of the control logic of conventional shut-off valves for offshore facilities, such as Figure 2 As shown, it is controlled by RS latch (reset priority). Under normal circumstances, USD is the shut-off valve closing signal. Offshore facilities mainly include ESD, PSD, USD and other shut-off signals. The signal is normally 1. RESET is the reset signal to realize the reset operation of the shut-off signal. The signal is normally 0. SDV is the control system output control solenoid valve signal. According to the requirements, it is normally 1 to drive the solenoid valve to open the shut-off valve with power. When the shut-off signal appears, the shut-off signal becomes 0, the R end of the RS latch is 1, the latch triggers the reset SDV output to 0, the on-site solenoid valve loses power, and the shut-off valve closing control function is realized; when the USD shut-off signal always exists, the reset RESET is invalid;

[0004] When the shutdown signal returns to normal, the shutdown signal becomes 1, and the R end of the RS latch is 0. At this time, RESET is triggered, the S end of the RS latch is 1, SDV is set, and the SDV output becomes 1, realizing that the on-site shut-off valve controls the solenoid valve to be energized. Since the on-site solenoid valve has a mechanical self-locking function, after the shut-off valve solenoid valve is reset and energized, the on-site operator needs to arrive at the site to confirm safety and then perform a mechanical self-locking reset to open the solenoid valve gas circuit, thereby finally realizing the opening of the shut-off valve.

[0005] With the continuous development of offshore oil production facilities, the level of intelligence has gradually improved, and the remote control capabilities of offshore oil production facilities have also gradually improved and made great progress. Under the background of digital intelligence empowerment, the realization of less-manned, unmanned, and remotely controlled production of offshore oil production facilities has gradually become a reality.

[0006] During the construction of offshore smart oil and gas fields, two modes have emerged: manned production and unmanned production under specific conditions. Due to the influence of factors such as the application environment of offshore facilities, equipment failures, and process fluctuations, both modes will experience unexpected production shutdowns. In the manned production mode, when production is shut down, the emergency shutdown system will automatically close the shut-off valve to ensure process safety. In the production resumption stage, in order to ensure that personnel can go to the site to confirm the safety of the environment and equipment, the shut-off valve is set with an on-site locking function. Therefore, to resume production, operators must go to the site to confirm safety and perform self-locking reset before opening the shut-off valve to achieve process flow conduction. In the unmanned production mode, when production is shut down due to monitoring instruments and process fluctuations, in order to resume production as soon as possible, it is necessary to remotely open the shut-off valve to conduct the process flow and start production. Therefore, it is urgent to solve the control requirements of the shut-off valve in the unmanned resumption of production of offshore facilities. Utility Model Content

[0007] The main purpose of the utility model is to provide a shut-off valve control system to achieve the control needs of the shut-off valve in an on-site unmanned production mode.

[0008] The technical solution adopted by the utility model to solve the technical problem is: to provide a shut-off valve control system, including:

[0009] A first solenoid valve for controlling the shut-off valve to open or close by supplying or releasing a driving gas source, wherein the first solenoid valve includes a mechanical self-locking module, and further includes:

[0010] a bypass module connected in parallel with the first solenoid valve;

[0011] A control module, wherein

[0012] The bypass module is controlled by the control module and is turned on in unmanned mode upon receiving a signal to resume production after shutdown.

[0013] Preferably, under the control of the control module, in unmanned mode, the first solenoid valve opens upon receiving a valve opening signal, closes upon receiving a valve closing signal, and closes upon receiving a resume-after-shutdown signal.

[0014] Preferably, the first solenoid valve is kept closed in unmanned mode under the control of the control module.

[0015] Preferably, under the control of the control module, the bypass module is opened when a valve opening signal is received in the unmanned mode, and is closed when a valve closing signal is received.

[0016] Preferably, the bypass module is kept turned off in manned mode under the control of the control module.

[0017] Preferably, the bypass module comprises a second solenoid valve.

[0018] Preferably, the bypass module further comprises a first isolating device and / or a second isolating device for isolating the second solenoid valve from the first solenoid valve in manned mode.

[0019] Preferably, the first isolation device is an isolation ball valve, a first end of the isolation ball valve is connected to the gas source outlet, and a second end of the isolation ball valve is connected to the first end of the second solenoid valve.

[0020] Preferably, the second isolation device is a three-way valve, a first end of the three-way valve is connected to the second end of the second solenoid valve, and a third end of the three-way valve is connected to the first end of the first solenoid valve.

[0021] Preferably, the control module includes a first RS latch, a first AND gate unit, a second RS latch, a production mode switch, a soft reset switch and a second AND gate unit;

[0022] A valve control signal is input to the set end of the first RS latch, a reset signal is input to the reset end of the first RS latch, and an output end of the first RS latch is connected to a control end of the first solenoid valve;

[0023] The output end of the first RS latch is connected to the first input end of the first AND gate unit;

[0024] The output end of the production mode switch outputs a mode signal, and the output end of the production mode switch is connected to the second input end of the first AND gate unit and the first input end of the second AND gate unit;

[0025] The soft reset switch outputs a soft reset signal, and the output end of the soft reset switch is connected to the second input of the second AND gate unit;

[0026] The set terminal of the second RS latch is connected to the output terminal of the first AND gate unit;

[0027] The reset terminal of the second RS latch is connected to the output terminal of the second AND gate unit;

[0028] An output end of the second RS latch is connected to a control end of the second solenoid valve.

[0029] The utility model provides a shut-off valve control system, which adds a bypass module and a control module connected in parallel with a first solenoid valve, so that the bypass module is opened in an unmanned mode upon receiving a signal for resuming production after shutdown, and by adding an unmanned mode solenoid valve control function to the original manned mode shut-off valve control system, the shut-off valve can be remotely controlled to be shut down and resume production through the bypass module and the control module in the unmanned mode, thereby solving the problem of controlling the shut-off valve in the unmanned mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0031] Figure 1 This is the logic structure diagram of a conventional shut-off valve control system;

[0032] Figure 2 This is the logic structure diagram of the RS latch;

[0033] Figure 3 This is a logical structure diagram of the first embodiment of the shut-off valve control system of the utility model;

[0034] Figure 4 This is a logical structure diagram of the second embodiment of the shut-off valve control system of the utility model;

[0035] Figure 5 This is a logical structure diagram of the third embodiment of the shut-off valve control system of the utility model;

[0036] Figure 6 This is a logical structure diagram of the fourth embodiment of the shut-off valve control system of the utility model;

[0037] Figure 7 This is a logical structure diagram of the fifth embodiment of the shut-off valve control system of the utility model;

[0038] Figure 8 This is a logical structure diagram of the sixth embodiment of the shut-off valve control system of the utility model;

[0039] Fig. 9 This is a schematic diagram of a working process of the sixth embodiment of the shut-off valve control system of the utility model;

[0040] Fig.10 It is a logic structure diagram of a control module of a shut-off valve control system of the utility model.

[0041] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0043] Figure 3 It is a logical structure diagram of the first embodiment of the shut-off valve control system of the utility model. The shut-off valve control system of this embodiment includes a first solenoid valve 10 for controlling the shut-off valve to open or close by driving the supply or release of an air source, and the first solenoid valve 10 includes a mechanical self-locking module, and also includes a bypass module 20 and a control module 30 connected in parallel with the first solenoid valve 10, wherein the bypass module 20 is under the control of the control module 30 and is opened in unmanned mode upon receiving a signal to resume production after shutdown.

[0044] In this embodiment, a bypass module and a control module are added in parallel with the first solenoid valve, so that in the unmanned mode, when the control module receives a shutdown and resumption signal, the bypass module is controlled to open. By adding the unmanned mode solenoid valve control function to the original manned mode shut-off valve control system, the shut-off valve can be remotely controlled to shut down and resume production through the bypass module and the control module in the unmanned mode, thereby solving the control problem of the shut-off valve in the unmanned mode.

[0045] In an optional embodiment, under the control of the control module, in unmanned mode, the first solenoid valve opens when a valve opening signal is received, closes when a valve closing signal is received, and closes when a resumption of production after shutdown signal is received.

[0046] In an optional embodiment, the first solenoid valve remains closed in the unmanned mode under the control of the control module.

[0047] In an optional embodiment, the bypass module is under the control of the control module and, in unmanned mode, is opened upon receiving a valve opening signal and is closed upon receiving a valve closing signal.

[0048] In an optional embodiment, the bypass module remains turned off in manned mode under the control of the control module.

[0049] Figure 4This is a logical structure diagram of the second embodiment of the shut-off valve control system of the utility model. The shut-off valve control system of this embodiment includes a first solenoid valve 10, a bypass module and a control module 30, wherein the bypass module includes a second solenoid valve 20. Under the control of the control module 30, the second solenoid valve 20 is opened when receiving a shutdown and resumption signal in the unmanned mode. Under the control of the control module 30, the second solenoid valve 20 is opened when receiving a valve opening signal in the unmanned mode, and is closed when receiving a valve closing signal.

[0050] Figure 5 This is a logical structure diagram of the third embodiment of the shut-off valve control system of the utility model. The shut-off valve control system of this embodiment includes a first solenoid valve 10, a bypass module and a control module 30, wherein the bypass module includes a second solenoid valve 20 and a first isolation device 40 isolating the second solenoid valve 20 from the first solenoid valve 10. The first isolation device can isolate the first end of the second solenoid valve 20 from the first end of the first solenoid valve.

[0051] In this embodiment, the second solenoid valve 20 and the first solenoid valve 10 are isolated by the first isolation device. In the manned mode, a redundant device can be provided for isolating the second solenoid valve 20 and the first solenoid valve 10 to prevent the second battery valve from being unable to be shut down due to a malfunction and to prevent the leakage of the driving gas, thereby improving the availability of the bypass module 20.

[0052] Figure 6 This is a logical structure diagram of the fourth embodiment of the shut-off valve control system of the utility model. The shut-off valve control system of this embodiment includes a first solenoid valve 10, a bypass module and a control module 30, wherein the bypass module includes a second solenoid valve 20, a first isolation device 40 and a second isolation device 50 that isolate the second solenoid valve 20 from the first solenoid valve 10. The first isolation device isolates the first end of the second solenoid valve 20 from the first solenoid first end, and the second isolation device isolates the second end of the second solenoid valve 20 from the first solenoid second end.

[0053] In this embodiment, the second solenoid valve 20 and the first solenoid valve 10 are isolated by the first isolation device, and in the manned mode, a redundant device can be provided for isolating the second solenoid valve 20 and the first solenoid valve 10 to prevent the second battery valve from being unable to be shut down due to a fault and to prevent leakage of the driving gas. The second solenoid valve 20 and the first solenoid valve 10 are isolated by the second isolation device, and in the manned mode, a release drive and an isolation redundant device can be provided for isolating the second solenoid valve 20 and the first solenoid valve 10 to prevent the second battery valve from being unable to serve as an exhaust port of the driving gas source due to a fault, to prevent blockage of the driving gas, and to improve the availability of the bypass module 20.

[0054] Figure 7This is a logical structure diagram of the shutoff valve control system embodiment 5 of the utility model. The shutoff valve control system of this embodiment includes a first solenoid valve 10, a bypass module and a control module 30, wherein the bypass module includes a second solenoid valve 20, an isolation ball valve 40 isolating the second solenoid valve 20 from the first solenoid valve 10, and a second isolation device 5.

[0055] Figure 8 This is a logical structure diagram of the sixth embodiment of the shutoff valve control system of the utility model. The shutoff valve control system of this embodiment includes a first solenoid valve 10, a bypass module and a control module 30, wherein the bypass module includes a second solenoid valve 20, an isolation ball valve 40 isolating the second solenoid valve 20 from the first solenoid valve 10, and a three-way valve 50.

[0056] Fig. 9 This is a schematic diagram of a working process of the sixth embodiment of the shut-off valve control system of the utility model. As shown in the figure, the driving gas source port 70 inputs driving gas, and the driving gas is used to control the shut-off valve 60 to close or open;

[0057] In manned mode, the isolation ball valve 40 is closed, the first port and the second port of the three-way valve 50 are connected, and the third port is closed.

[0058] When receiving the opening signal from the control module 30, the first solenoid valve 10 is energized, the first port and the third port are connected, the second port is closed, the driving gas is transmitted to the shut-off valve 60 through the first solenoid valve 10, the shut-off valve 60 inputs the driving gas, the shut-off valve 60 drives the air cavity pressure to increase, and the shut-off valve 60 is opened.

[0059] When receiving the closing signal from the control module 30, the first solenoid valve 10 loses power, the first port of the first solenoid valve 10 is closed, the third port of the first solenoid valve 10 is connected to the second port of the first solenoid valve 10, the mechanical self-locking function is activated, the driving air shut-off valve 60 discharges the driving air and releases it from the second port of the three-way valve 50, the shut-off valve 60 drives the air cavity pressure to decrease, and the shut-off valve 60 is closed.

[0060] When the shutdown and resumption signal is received from the control module 30, the first solenoid valve 10 is energized, the first port of the first solenoid valve 10 and the third port of the first solenoid valve 10 are connected, the second port of the first solenoid valve 10 is closed, and the mechanical self-locking function is manually reset, and the driving gas is transmitted to the shut-off valve 60 through the first solenoid valve 10, and the shut-off valve 60 inputs the driving gas, and the shut-off valve 60 drives the air cavity pressure to increase and resume production.

[0061] In unmanned mode, the isolation ball valve 40 is opened, the first port of the three-way valve 50 is connected to the third port of the three-way valve 50, the second port of the three-way valve 50 is closed, the first port of the first solenoid valve 10 is closed, and the second port of the first solenoid valve 10 is connected to the third port of the first solenoid valve 10.

[0062] When receiving the opening signal from the control module 30, the second solenoid valve 20 is energized, the first port of the second solenoid valve 20 is connected to the third port of the second solenoid valve 20, the second port of the second solenoid valve 20 is closed, and the driving gas is transmitted to the shut-off valve 60 through the second solenoid valve 20. The shut-off valve 60 inputs the driving gas, the shut-off valve 60 drives the air cavity pressure to increase, and the shut-off valve 60 is opened.

[0063] When receiving the closing signal from the control module 30, the second solenoid valve 20 loses power, the first port of the second solenoid valve 20 is closed, the third port of the second solenoid valve 20 is connected to the second port of the second solenoid valve 20, the driving air shut-off valve 60 discharges the driving air and releases it from the second port of the three-way valve 50, the shut-off valve 60 drives the air cavity pressure to decrease, and the shut-off valve 60 is closed.

[0064] When receiving the shutdown and resumption signal from the control module 30, the second solenoid valve 20 is energized, the first port of the second solenoid valve 20 is connected to the third port of the second solenoid valve 20, the second port of the second solenoid valve 20 is closed, and the driving gas is transmitted to the shut-off valve 60 through the second solenoid valve 20. The shut-off valve 60 inputs the driving gas, the shut-off valve 60 drives the air cavity pressure to increase, and the shut-off valve 60 opens and resumes production.

[0065] It should be noted that the solution, through the optimization and transformation of the program logic and the addition of solenoid valves, solved the contradiction between the operation of the shut-off valve in manned and unmanned modes and the control of conventional manned production, realized on-site reset in manned mode, solved the requirement of unmanned remote reset, and at the same time guaranteed the original manned mode design.

[0066] Fig.10 The control module 30 includes a first RS latch 301 , a first AND gate unit 302 , a second RS latch 303 , a production mode switch, a soft reset switch and a second AND gate unit 304 .

[0067] The shut-off logic outputs a valve control signal, which includes opening and closing. The reset logic outputs a reset signal. The set end of the first RS latch 301 inputs the valve control signal. The reset end of the first RS latch 301 inputs the reset signal. The output end of the first RS latch 301 is connected to the control end of the first solenoid valve 10. The output end of the first RS latch 301 is connected to the first input end of the first AND gate unit 302.

[0068] The output end of the production mode switch outputs a mode signal, the mode signal includes an unmanned mode and a manned mode, and the output end of the production mode switch is connected to the second input end of the first AND gate unit 302 and the first input end of the second AND gate unit 304 .

[0069] The soft reset switch outputs a soft reset signal, and the output end of the soft reset switch is connected to the second input of the second AND gate unit 304 .

[0070] The set end of the second RS latch 303 is connected to the output end of the first AND gate unit 302. The reset end of the second RS latch 303 is connected to the output end of the second AND gate unit 304. The output end of the second RS latch 303 is connected to the control end of the second solenoid valve 20.

[0071] The following table is a circuit signal table of the control module of this embodiment. The logic description shows that the use of the second solenoid valve is limited by AND gate logic. When the production mode switch is in manned mode, the output signal is in state 0, so that the second RS latch set end that controls the second solenoid valve inputs a shutdown signal, and the second solenoid valve is in a power-off state; when the production mode switch is switched to unmanned mode, the output signal is in state 1, and the second solenoid valve can be reset by a soft reset of the operating station HMI, and is also controlled by the original shutdown logic.

[0072] Logic Signal State 1 State 0 Remark Shutdown Logic normal Shutdown Original shutdown system signal Reset Reset No Action The original shutdown system reset signal Production mode switch No-man mode Manned Mode HMI soft reset Reset No Action

[0073] In this embodiment, the control module can achieve dual-mode switching by adding AND gate logic, a second RS latch, and a production mode switch. In manned mode, only the first solenoid valve is controlled, and in unmanned mode, the second solenoid valve is added for control, thereby providing the solenoid valve control system with a remote control function in unmanned mode.

[0074] The above description is only the preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the scope of the claims of the utility model.

Claims

1. A control system for a shut-off valve, comprising a first solenoid valve for controlling the shut-off valve to open or close by supplying or releasing a driving gas source, and the first solenoid valve comprises a mechanical self-locking module, characterized in that: Also includes: a bypass module connected in parallel with the first solenoid valve; A control module, wherein The bypass module is controlled by the control module and is turned on in unmanned mode upon receiving a signal to resume production after shutdown.

2. The system according to claim 1, characterized in that Under the control of the control module, the first solenoid valve opens when a valve opening signal is received, closes when a valve closing signal is received, and closes when a resumption of production after shutdown is received in unmanned mode.

3. The system according to claim 1, characterized in that The first solenoid valve is kept closed in the unmanned mode under the control of the control module.

4. The system according to any one of claims 1 to 3, characterized in that: Under the control of the control module, the bypass module is opened when receiving a valve opening signal and is closed when receiving a valve closing signal in the unmanned mode.

5. The system according to claim 4, characterized in that The bypass module is controlled by the control module and remains turned off in manned mode.

6. The system according to claim 1, wherein: The bypass module includes a second solenoid valve.

7. The system according to claim 6, characterized in that The bypass module further comprises a first isolating device and / or a second isolating device for isolating the second solenoid valve from the first solenoid valve in the manned mode.

8. The system according to claim 7, characterized in that The first isolation device is an isolation ball valve, a first end of the isolation ball valve is connected to the gas source outlet, and a second end of the isolation ball valve is connected to the first end of the second solenoid valve.

9. The system according to claim 7, characterized in that The second isolation device is a three-way valve, a first end of the three-way valve is connected to the second end of the second solenoid valve, and a third end of the three-way valve is connected to the first end of the first solenoid valve.

10. The system according to claim 9, characterized in that The control module includes a first RS latch, a first AND gate unit, a second RS latch, a production mode switch, a soft reset switch and a second AND gate unit; A valve control signal is input to the set end of the first RS latch, a reset signal is input to the reset end of the first RS latch, and an output end of the first RS latch is connected to a control end of the first solenoid valve; The output end of the first RS latch is connected to the first input end of the first AND gate unit; The output end of the production mode switch outputs a mode signal, and the output end of the production mode switch is connected to the second input end of the first AND gate unit and the first input end of the second AND gate unit; The soft reset switch outputs a soft reset signal, and the output end of the soft reset switch is connected to the second input of the second AND gate unit; The set terminal of the second RS latch is connected to the output terminal of the first AND gate unit; The reset terminal of the second RS latch is connected to the output terminal of the second AND gate unit; An output end of the second RS latch is connected to a control end of the second solenoid valve.

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