CN216519922U

CN216519922U - Emergency remote cutting device for LNG tank car

Info

Publication number: CN216519922U
Application number: CN202122985428.4U
Authority: CN
Inventors: 徐占起; 刘鹏飞; 付磊; 段晓妮; 赵腾
Original assignee: Xinjiang Xifei Technology Co ltd
Current assignee: Xinjiang Xifei Technology Co ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-05-13
Anticipated expiration: 2031-11-30

Abstract

The utility model discloses an LNG tank wagon emergency remote cut-off device, which comprises a control cabinet, an LNG concentration detector, a pneumatic action mechanism, a spring air pipe and a remote controller, the pneumatic actuating mechanism comprises a rotary cylinder, the bottom of the rotary cylinder is fixedly connected with a cylinder mounting plate through a bolt, the side wall of the cylinder mounting plate is fixedly connected with a valve body fixing back plate through bolts, and the side wall of the valve body fixing back plate is fixedly connected with a valve body fixing cushion block through bolts.

Description

Emergency remote cutting device for LNG tank car

Technical Field

The utility model relates to the field of LNG (liquefied natural gas), in particular to an LNG tank car emergency remote cut-off device.

Background

Liquefied natural gas (also called LNG, hereinafter referred to as LNG) tank cars are used to transport LNG and there is a certain risk of gas leakage when injecting LNG into and out of tank car tanks. Therefore, the 'emergency cut-off knob' is arranged on the tank car and used for closing the LNG circulation pipeline on the tank car, and when the 'emergency cut-off knob' is rotated to a cut-off gear, the LNG pipeline valve on the tank car is closed.

At present, the existing 'emergency cut-off knob' is generally manually rotated, and the 'emergency cut-off knob' has no way to be linked with an emergency signal of an LNG gas station, so when an emergency situation occurs in the gas station, personnel still need to manually cut off the gas station on site, once combustible gas leakage occurs on site, the personnel are very dangerous to approach a tank car, one is the danger of fire and explosion, and the other is the danger of frostbite (because the temperature of LNG is extremely low).

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an LNG tank wagon emergency remote cut-off device to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme:

the LNG tank car emergency remote cutting device comprises a control cabinet, an LNG concentration detector, a pneumatic action mechanism, a spring gas pipe and a remote controller, wherein the pneumatic action mechanism comprises a rotary cylinder, the bottom of the rotary cylinder is fixedly connected with a cylinder mounting plate through a bolt, the side wall of the cylinder mounting plate is fixedly connected with a valve body fixing back plate through a bolt, the side wall of the valve body fixing back plate is fixedly connected with a valve body fixing cushion block through a bolt, the bottom of the rotary cylinder is fixedly connected with a switch valve vertical direction fixing block below the cylinder mounting plate through a screw, the switch valve vertical direction fixing block is fixedly connected with a switch handle rotating finger through a screw, the other side of the cylinder mounting plate is fixedly connected with a shaft clamp mounting plate through a screw, the outer wall of the shaft clamp mounting plate is fixedly connected with a shaft clamp mechanism through a screw, and the other end of the shaft clamp mechanism is fixedly connected with a valve body fixing movable cushion block through a screw, the rotary air cylinder is connected with an air path quick-plugging connector in a threaded mode, a switch valve body is arranged between the valve body fixing cushion block and the valve body fixing movable cushion block, and a switch handle is arranged at the top of the switch valve body.

As a further scheme of the utility model: the top of the rotary cylinder is fixedly connected with a handle mounting plate through screws, and the handle mounting plate is fixedly connected with a handle through screws.

As a still further scheme of the utility model: the shaft clamp mechanism comprises a shaft clamp fixing seat, a shaft clamp handle, a shaft clamp movable pressing block, a first connecting pin shaft, a second connecting pin shaft and a third connecting pin shaft, the shaft clamp fixing seat is fixedly connected to the side wall of the shaft clamp mounting plate through screws, the shaft clamp handle is riveted with the shaft clamp fixing seat and the shaft clamp movable pressing handle through the second connecting pin shaft and the third connecting pin shaft respectively, the shaft clamp movable pressing handle is riveted with the shaft clamp fixing seat through the first connecting pin shaft, and rotation is achieved in the shaft clamp fixing seat, the shaft clamp handle and the shaft clamp movable pressing handle.

As a still further scheme of the utility model: the movable pressing handle of the shaft clamp is designed into a U-shaped groove, the threaded end of the movable pressing block of the shaft clamp is arranged in the movable pressing handle of the shaft clamp, and the movable pressing block of the shaft clamp is fixedly connected with the movable pressing handle of the shaft clamp through two nuts.

As a still further scheme of the utility model: one end of the spring air pipe is connected with an air passage quick connector in a threaded connection with the rotary cylinder in an inserting mode.

As a still further scheme of the utility model: the remote controller is in wireless connection with the control cabinet.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, the control cabinet is remotely controlled by a remote controller, the electromagnetic valve in the control cabinet controls the rotary cylinder to work, the movable end of the rotary cylinder drives the switch handle to rotate, the rotary finger of the switch handle rotates, and the switch valve body is closed by the rotary finger of the switch handle, so that an operator can control the emergency cut-off device to act through the remote controller at a safe distance, the LNG pipeline valve of the tank car is closed, and the safety of the operator is improved.

2. The LNG concentration detector detects the LNG concentration, and when the LNG concentration is higher than a safety value, the LNG concentration detector automatically triggers emergency cut-off action, so that a switch valve body of an LNG pipeline of a tank car is closed, and manual/automatic double insurance is realized.

3. The emergency interlocking device is interconnected with an emergency interlocking signal of the LNG station, on one hand, the emergency interlocking device can receive the emergency signal sent by the LNG station, and triggers an emergency cut-off action after receiving the emergency signal, so that a switch valve body of an LNG pipeline of a tank car is closed; on the other hand, the device detects that the concentration of LNG exceeds the standard, and sends an emergency signal to the gas station while executing a cut-off action, so as to trigger the emergency response of the gas station.

Drawings

Fig. 1 is a schematic structural diagram of an emergency remote cut-off device of an LNG tanker.

Fig. 2 is a front view of an emergency remote disconnect device for an LNG tanker.

Fig. 3 is a cross-sectional view of an emergency remote disconnect device for an LNG tanker.

Fig. 4 is a schematic view of a center shaft clamp of the emergency remote cutting device of the LNG tanker.

Fig. 5 is a schematic diagram of an emergency cut-off device system of an LNG tanker.

Fig. 6 is an emergency shutdown execution flow of the LNG tanker.

Fig. 7 is a schematic diagram of an electric control cabinet.

Fig. 8 is a schematic view of the internal connection of the electric control cabinet.

In the figure: the gas path quick-connection type switch valve comprises a handle 1, a handle mounting plate 2, a rotary cylinder 3, a cylinder mounting plate 4, a valve body fixing back plate 5, a valve body fixing cushion block 6, a switch valve body 7, a shaft clamp mounting plate 8, a switch handle rotating finger 9, a shaft clamp fixing seat 10, a shaft clamp handle 11, a shaft clamp movable pressing handle 12, a shaft clamp movable pressing block 13, a valve body fixing movable cushion block 14, a switch handle 15, a switch valve vertical direction fixing block 16, a gas path quick-connection plug 17, a first connecting pin shaft 18, a second connecting pin shaft 19 and a third connecting pin shaft 20.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 8, in the embodiment of the utility model, the LNG tank car emergency remote cut-off device comprises a control cabinet, an LNG concentration detector, a pneumatic action mechanism, a spring gas pipe and a remote controller, wherein the LNG concentration detector is a combustible gas universal detector, the time-keeping safety electronic production is realized, a cabinet body of the control cabinet is an explosion-proof cabinet with a 400x600 universal model, a manufacturer is a sika leap, the control cabinet and the LNG concentration detector are installed on the LNG tank car, the pneumatic action mechanism comprises a rotary cylinder 3, the bottom of the rotary cylinder 3 is fixedly connected with a cylinder installation plate 4 through a bolt, the side wall of the cylinder installation plate 4 is fixedly connected with a valve body fixing back plate 5 through a bolt, the side wall of the valve body fixing back plate 5 is fixedly connected with a valve body fixing cushion block 6 through a bolt, the bottom of the rotary cylinder 3 is fixedly connected with a switch valve vertical direction fixing block 16 below the cylinder installation plate 4 through a bolt, the switch valve vertical direction fixing block 16 is fixedly connected with a switch handle rotating finger 9 through a bolt, the other side of the cylinder mounting plate 4 is fixedly connected with a shaft clamp mounting plate 8 through screws, the outer wall of the shaft clamp mounting plate 8 is fixedly connected with a shaft clamp mechanism through screws, the other end of the shaft clamp mechanism is fixedly connected with a valve body fixing movable cushion block 14 through screws, a gas circuit quick-insertion joint 17 is in threaded connection with the rotary cylinder 3, a switch valve body 7 is arranged between the valve body fixing cushion block 6 and the valve body fixing movable cushion block 14, a switch handle 15 is arranged at the top of the switch valve body 7, a handle mounting plate 2 is fixedly connected with the top of the rotary cylinder 3 through screws, the handle mounting plate 2 is fixedly connected with a handle 1 through screws, the shaft clamp mechanism comprises a shaft clamp fixing seat 10, a shaft clamp handle 11, a shaft clamp movable pressing handle 12, a shaft clamp movable pressing block 13, a first connecting pin shaft 18, a second connecting pin 19 and a third connecting pin 20, the shaft clamp fixing seat 10 is fixedly connected with the side wall of the shaft clamp mounting plate 8 through screws, the shaft clamp handle 11 is riveted with the shaft clamp fixing seat 10 and the shaft clamp movable pressing handle 12 through a second connecting pin shaft 19 and a third connecting pin shaft 20 respectively, the shaft clamp movable pressing handle 12 is riveted with the shaft clamp fixing seat 10 through a first connecting pin shaft 18, rotation in the shaft clamp fixing seat 10, the shaft clamp handle 11 and the shaft clamp movable pressing handle 12 is achieved, secondly, the structure adopts a mature shaft clamp structure form, dead points exceeding 90 degrees in a closed state can be achieved, the shaft clamp movable pressing handle 12 has a self-locking function and plays a role in safety and reliability, the shaft clamp movable pressing handle 12 is designed into a U-shaped groove, adjustment of a shaft clamp movable pressing block 13 and a valve body fixed movable cushion block 14 in the vertical direction is facilitated, adaptability of the device is enhanced, a cylinder on the left side of the shaft clamp movable pressing block 13 adopts a full-thread form, adjustment of the shaft clamp movable pressing block 13 and the valve body fixed movable cushion block 14 in the horizontal direction is met, and the whole device is enabled to clamp objects with various thicknesses, the threaded end of the shaft clamp movable pressing block 13 is arranged in the shaft clamp movable pressing handle 12, and the shaft clamp movable pressing block 13 is fixedly connected with the shaft clamp movable pressing handle 12 through two nuts.

The control system comprises a control cabinet, an LNG concentration detector and a remote controller, a control panel and a switch power supply are installed in the control cabinet, the model of the switch power supply is HDR-30-24V, a manufacturer is a plain weft power supply and realizes signal receiving and sending and logic processing, the control panel comprises a PLC, a wireless receiving module, the LNG concentration detector, an LNG gas station interlocking signal, a manual cut-off button, an electromagnetic valve and a plurality of indicator lamps, the PLC is Siemens S7-1211C, the external alternating current 220 volt power supply is converted into the direct current 24 volt power supply by the switch power supply of an electric control part to supply power to the PLC, the wireless receiver and the electromagnetic valve, the PLC is a central processing unit and is connected with the wireless receiving module, the LNG concentration detector, the LNG gas station interlocking signal, the manual cut-off button, an electromagnetic valve coil and the indicator lamps, safety protection logic runs in the PLC, and the reliability of the system is improved, the method of mutual backup of 2 PLCs ensures that the safety logic can reliably run, and when the PLC1 has software and hardware faults, the PLC2 takes over the logic scanning work immediately; the remote controller is infinitely connected with the PLC through a wireless receiving module of the control cabinet, a reset button and an emergency button are arranged on the remote controller, the other end of the spring air pipe is connected with an electromagnetic valve of the control cabinet, and the other end of the electromagnetic valve is connected with an air source.

The working principle of the utility model is as follows:

when the device is used, an operator fixes the whole device through the handle 1, the shaft clamp handle 11 is rotated upwards, the shaft clamp handle 11 drives the shaft clamp movable pressing handle 12 to rotate anticlockwise along the rotating point of the shaft clamp fixing seat 10 at the moment, then the shaft clamp movable pressing block 13 and the valve body fixed movable cushion block 14 rotate anticlockwise, the whole device is in an open state, the operator moves the whole device to the top of the switch valve body 7, the right side face of the valve body fixed cushion block 6 is attached to the side face of the switch valve body 7, meanwhile, the gravity of the whole device is transferred to the top of the switch handle 15, the bottom face of the switch valve vertical direction fixing block 16 is in contact with the top face of the switch handle 15, the operator rotates the shaft clamp handle 11 downwards and presses the shaft clamp handle 11, the shaft clamp handle 11 drives the shaft clamp movable pressing handle 12 to rotate clockwise along the rotating point of the shaft clamp fixing seat 10 at the moment, and then the shaft clamp movable pressing block 13 is driven, The valve body fixes the movable cushion block 14 to rotate clockwise, the whole equipment is in a closed state, and an operator starts a power supply button of the control cabinet and opens the gas source valve; when a valve closing button in the remote controller is pressed, the rotary cylinder 3 rotates to drive the switch handle to rotate and rotate the finger 9, and further drive the switch handle 15 to rotate, so that the valve body of the manual operation switch is closed and opened.

The LNG concentration detector detects the LNG concentration in real time, and when the concentration is higher than 25% (the concentration can be adjusted by a user through the same button), an alarm signal is sent to the PLC; the remote controller sends a wireless signal, and the control cabinet can receive the signal. The signals include emergency shut-off and reset signals. After receiving the emergency cut-off signal, sending an alarm signal to the PLC; a manual emergency cut-off button is arranged on the control cabinet, and when an operator presses the button, the PLC can detect the signal; the interlocking signal of the LNG station is connected with the PLC, and the PLC can detect the signal when the interlocking signal is triggered; and executing signal scanning logic of the internal period of the PLC, and activating a solenoid valve coil by the PLC immediately once any one emergency cut-off signal (an interlocking signal of an LNG concentration detector, a remote controller, a manual button and an LNG gas station) is triggered, and keeping the state until manual reset. Meanwhile, an emergency cut-off state signal is sent to the gas station, and a cut-off indicator lamp is activated. After the solenoid valve coil is activated, a piezoelectric solenoid valve in the control cabinet is opened, compressed air flows into the pneumatic actuating mechanism through the action air channel, the movable end of the rotary cylinder 3 rotates, the movable end of the rotary cylinder 3 drives the switch handle rotating finger 9 to rotate, and the rotating switch handle rotating finger 9 closes the switch valve body 7 through the switch handle 15.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the utility model can be made, and equivalents and modifications of some features of the utility model can be made without departing from the spirit and scope of the utility model.

Claims

The emergent long-range cutting device of LNG tank wagon includes switch board, LNG concentration detector, pneumatic actuating mechanism, spring trachea and remote controller, its characterized in that: the pneumatic action mechanism comprises a rotary cylinder (3), the bottom of the rotary cylinder (3) is fixedly connected with a cylinder mounting plate (4) through bolts, the side wall of the cylinder mounting plate (4) is fixedly connected with a valve body fixing back plate (5) through bolts, the side wall of the valve body fixing back plate (5) is fixedly connected with a valve body fixing cushion block (6) through bolts, the bottom of the rotary cylinder (3) is fixedly connected with a switch valve vertical direction fixing block (16) below the cylinder mounting plate (4) through screws, the switch valve vertical direction fixing block (16) is fixedly connected with a switch handle rotating finger (9) through screws, the other side of the cylinder mounting plate (4) is fixedly connected with a shaft clamp mounting plate (8) through screws, the outer wall of the shaft clamp mounting plate (8) is fixedly connected with a shaft clamp mechanism through screws, and the other end of the shaft clamp mechanism is fixedly connected with a valve body fixing movable cushion block (14) through screws, threaded connection has gas circuit quick connector (17) on revolving cylinder (3), be provided with switch valve body (7) between fixed cushion of valve body (6) and the fixed movable cushion of valve body (14), switch valve body (7) top is provided with switch handle (15).
2. The LNG tanker emergency remote disconnect device of claim 1, wherein: the top of the rotary cylinder (3) is fixedly connected with a handle mounting plate (2) through a screw, and the handle mounting plate (2) is fixedly connected with a handle (1) through a screw.
3. The LNG tanker emergency remote disconnect device of claim 1, wherein: the shaft clamp mechanism comprises a shaft clamp fixing seat (10), a shaft clamp handle (11), a shaft clamp movable pressing handle (12), a shaft clamp movable pressing block (13), a first connecting pin shaft (18), a second connecting pin shaft (19) and a third connecting pin shaft (20), the shaft clamp fixing seat (10) is fixedly connected to the side wall of the shaft clamp mounting plate (8) through screws, the shaft clamp handle (11) is riveted with the shaft clamp fixing seat (10) and the shaft clamp movable pressing handle (12) through the second connecting pin shaft (19) and the third connecting pin shaft (20), the shaft clamp movable pressing handle (12) is riveted with the shaft clamp fixing seat (10) through the first connecting pin shaft (18), and rotation is achieved in the shaft clamp fixing seat (10), the shaft clamp handle (11) and the shaft clamp movable pressing handle (12).
4. The LNG tanker emergency remote disconnect of claim 3, wherein: the movable shaft clamp pressing handle (12) is designed to be a U-shaped groove, the threaded end of the movable shaft clamp pressing block (13) is arranged in the movable shaft clamp pressing handle (12), and the movable shaft clamp pressing block (13) is fixedly connected with the movable shaft clamp pressing handle (12) through two nuts.
5. The LNG tanker emergency remote disconnect device of claim 1, wherein: one end of the spring air pipe is connected with an air passage quick connector (17) in a threaded connection with the rotary cylinder (3) in an inserting mode.
6. The LNG tanker emergency remote disconnect device of claim 1, wherein: the remote controller is in wireless connection with the control cabinet.