A pressure control system for gaseous fuel supply

Abstract

The application discloses a pressure control system for gas fuel supply, a controller, a communicator, a monitoring mechanism and a control mechanism, the controller is electrically connected with the communicator, the monitoring mechanism and the control mechanism respectively, the monitoring mechanism is arranged along the laying path of the liquefied natural gas pipeline in sequence, so that the monitoring mechanism monitors the pressure values in each pipe section in the liquefied gas pipeline in sequence and sends the pressure values to the controller; the control mechanism is arranged along the laying path of the liquefied natural gas pipeline in sequence, so that the control mechanism controls the communication of each pipe section in the liquefied natural gas pipeline, and the pipe section with an abnormal pressure value is closed; the controller is used for controlling the control mechanism according to the pressure values in each pipe section, and after the pipe section with the abnormal pressure value is closed, the communicator sends inspection information to an external terminal. In the technical scheme, the liquefied natural gas pipeline is monitored in real time, accidents can be quickly investigated, and the normal operation of the fuel supply system is effectively ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of ship technology, in particular to a pressure control system for gas fuel supply. BACKGROUND

[0002] A ship is a man-made vehicle that mainly runs in geographical water. In addition, a civilian ship is generally called a ship, a military ship is called a ship, and a small ship is called a boat or a boat, which is collectively referred to as a ship or a boat. The interior mainly includes a containing space, a support structure and a drainage structure, and has a propulsion system using external or self-contained energy. The shape is generally a streamlined envelope that helps overcome fluid resistance, and the material is constantly updated with technological progress. Early natural materials such as wood, bamboo and hemp, and modern steel, aluminum, glass fiber, acrylic and various composite materials.

[0003] In order to reduce pollution and further improve the use of new energy power ships (such as natural gas, hydrogen and electricity), liquefied natural gas (LNG) power ships, as a kind of low-emission, high-automation and high-value-added ship, are more and more widely used in water transportation. At present, the technology of using liquefied natural gas as fuel in the field of ships is not mature, resulting in the lack of liquefied natural gas power ship gas fuel supply pressure monitoring technology, and the problem of unstable pressure in the liquefied natural gas pipeline, rising gas pressure in the pipeline, and pipeline damage or liquefied natural gas leakage. SUMMARY

[0004] The main purpose of the present application is to provide a pressure control system for gas fuel supply, which aims to solve the problem of being unable to monitor the pressure in the liquefied natural gas pipeline in real time.

[0005] To achieve the above purpose, the technical solution provided by the present application is:

[0006] A pressure control system for gas fuel supply, a controller, a communicator, a monitoring mechanism and a control mechanism, the controller is electrically connected with the communicator, the monitoring mechanism and the control mechanism respectively, the monitoring mechanism is arranged along the laying path of the liquefied natural gas pipeline in sequence, so that the monitoring mechanism monitors the pressure value in each pipe section in the liquefied gas pipeline in sequence and sends it to the controller; the control mechanism is arranged along the laying path of the liquefied natural gas pipeline in sequence, so that the control mechanism controls the communication of each pipe section in the liquefied natural gas pipeline, so that the pipe section with abnormal pressure value is closed; the controller is used to control the control mechanism according to the pressure value in each pipe section, and after the pipe section with abnormal pressure value is closed, the communicator sends inspection information to the external terminal.

[0007] Preferably, the control mechanism includes at least two electrically controlled valves, each of which is sequentially arranged along the laying path of the liquefied natural gas pipeline, so that at least two electrically controlled valves cooperate to close the pipeline with abnormal pressure values; the monitoring mechanism includes at least one pressure detector, each of which is sequentially and spaced along the laying path of the liquefied natural gas pipeline; at least one pressure detector is arranged between two adjacent electrically controlled valves; the controller is electrically connected to each electrically controlled valve and each pressure detector, and the controller is used to control two electrically controlled valves adjacent to the pressure detector that detected the abnormal pressure value, so as to close the pipeline section where the pressure detector that detected the abnormal pressure value is located.

[0008] Preferably, an indicator light is provided on the outside of the solenoid valve, and the controller is electrically connected to the indicator light. The controller is used to control each indicator light according to the opening and closing status of each solenoid valve. When each solenoid valve closes a pipe section with an abnormal pressure value, the indicator light of the solenoid valve in the closed state will light up.

[0009] Preferably, the pressure control system for gas fuel supply further includes a camera, a projection lamp, a moving mechanism, and an adjustment mechanism. The controller is electrically connected to the camera, the projection lamp, the moving mechanism, and the adjustment mechanism. The moving mechanism drives the camera and the adjustment mechanism, respectively, to move along the laying path of the liquefied natural gas pipeline, so that the camera acquires a maintenance image of the pipeline segment with abnormal pressure and sends the maintenance image to the controller. The adjustment mechanism drives the camera and is used to adjust the projection position of the projection lamp. The controller controls the moving mechanism based on the pressure detector that detects abnormal pressure, so that the moving mechanism drives the adjustment mechanism and the camera to move to the pipeline segment where the pressure detector detects abnormal pressure. The controller also controls the adjustment mechanism to adjust the projection position of the projection lamp based on the maintenance image, so that the projection lamp projects pressure data in front of the operator.

[0010] Preferably, the moving mechanism includes a track and an electrically controlled slide, the track being extended along the laying path of the liquefied natural gas pipeline; the electrically controlled slide is slidably connected to the track, and the electrically controlled slide is respectively driven and connected to the camera and the adjustment mechanism; the controller is electrically connected to the electrically controlled slide, and the controller is used to control the electrically controlled slide according to the pressure detector that detects an abnormal pressure value, so that the electrically controlled slide drives the adjustment mechanism and the camera to move to the pipeline segment where the pressure detector that detected the abnormal pressure value is located.

[0011] Preferably, the adjusting mechanism comprises a mounting base, a lifter, a first connecting frame and a second connecting frame, the mounting base is arranged on the side of the electric control slide away from the track, the projector lamp and the mounting base are arranged on the side of the mounting base away from the electric control slide, the lifter is arranged on the side of the projector lamp away from the monitoring mechanism; the first connecting frame is arranged on one end of the projector lamp and the lifter, the output end of the lifter is hinged to one end of the first connecting frame through a first hinge shaft, the projector lamp is arranged on the end of the first connecting frame away from the lifter; the second connecting frame is arranged between the first connecting frame and the mounting base, one end of the second connecting frame is connected to the mounting base, the other end of the second connecting frame is hinged to the first connecting frame through a second hinge shaft; the first hinge shaft and the second hinge shaft are parallel to the extension direction of the track; the controller is electrically connected to the lifter, and the controller is used for controlling the lifter to adjust the projection position of the projector lamp through the first connecting frame according to the maintenance image.

[0012] Preferably, the adjusting mechanism further comprises a lead screw sliding table module, the lead screw sliding table module is arranged on the side of the electric control slide away from the track, the lead screw sliding table module is drivingly connected to the mounting base, and the lead screw sliding table module drives the mounting base to move in the direction parallel to the track; the controller is electrically connected to the lead screw sliding table module, and the controller is used for controlling the lead screw sliding table module and the lifter to cooperate to adjust the projection position of the projector lamp according to the maintenance image.

[0013] Preferably, a plurality of illuminating lamps are arranged on the side of the mounting base away from the monitoring mechanism, the controller is electrically connected to each of the illuminating lamps, and the controller is used for controlling each of the illuminating lamps to illuminate the position of the pipe segment with abnormal pressure value when the electric control slide moves to the position of the pipe segment with abnormal pressure value detected by the pressure detector.

[0014] Compared with the prior art, the present application has at least the following beneficial effects:

[0015] The monitoring mechanism monitors the pressure value in the liquefied natural gas pipeline in real time; the control mechanism closes the dangerous pipe segment according to the pressure value, and the controller sends inspection information through the communication device, so that the staff can check the closed pipe segment in time, that is, the liquefied natural gas pipeline is monitored in real time, the accident can be quickly investigated, and the normal operation of the fuel supply system is effectively ensured. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to make the technical solutions in the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only need to be some embodiments of the present application, and other drawings can be obtained by those of ordinary skill in the art without any creative work on the basis of the drawings shown.

[0017] Fig. 1 Structure schematic view of an embodiment of the present application for pressure control system of gas fuel supply.

[0018] Fig. 2 Structure schematic view of another view.

[0019] Explanation of the reference signs:

[0020] 1-liquefied natural gas pipeline;

[0021] 2-control mechanism; 21-electric control valve; 22-indicator light;

[0022] 3-camera;

[0023] 4-projection lamp;

[0024] 5-moving mechanism; 51-track; 52-electric control slide;

[0025] 6-adjusting mechanism; 61-mounting seat; 62-lifter; 63-first connecting frame; 64-second connecting frame; 65-screw slide module; 66-illumination lamp;

[0026] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without any creative work belong to the protection scope of the present application.

[0028] The present application proposes a pressure control system for gas fuel supply.

[0029] As Figs. 1-2The pressure control system for gas fuel supply includes a controller, a communicator, monitoring mechanisms (not shown in the figure) and control mechanisms 2. The controller is electrically connected to the communicator, the monitoring mechanisms and the control mechanisms 2 respectively. The monitoring mechanisms are arranged along the laying path of the liquefied natural gas pipeline 1 in sequence, so that the monitoring mechanisms monitor the pressure values in each pipe section of the liquefied gas pipeline in sequence and send the pressure values to the controller. The control mechanisms 2 are arranged along the laying path of the liquefied natural gas pipeline 1 in sequence, so that the control mechanisms 2 control the communication of each pipe section of the liquefied natural gas pipeline 1, and the pipe section with an abnormal pressure value is closed. The controller controls the control mechanisms 2 according to the pressure values in each pipe section, and after the pipe section with the abnormal pressure value is closed, the communicator sends inspection information to an external terminal.

[0030] The monitoring mechanisms monitor the pressure values in the liquefied natural gas pipeline 1 in real time. The control mechanisms 2 close the dangerous pipe sections according to the pressure values. The controller sends inspection information through the communicator, so that the staff can check the closed pipe sections in time, which realizes real-time monitoring of the liquefied natural gas pipeline 1 and quickly investigates accidents, and effectively ensures the normal operation of the fuel supply system.

[0031] Specifically, the fuel supply in the ship is generally supplied by multiple pipelines at the same time, so that the closure of a small number of pipeline pressure values will not affect the normal operation of the fuel supply system.

[0032] The control mechanisms 2 include at least two electric control valves 21, and each electric control valve 21 is arranged along the laying path of the liquefied natural gas pipeline 1 in sequence, so that the at least two electric control valves 21 cooperate to close the pipeline with the abnormal pressure value. The monitoring mechanisms include at least one pressure detector (not shown in the figure), and each pressure detector is arranged along the laying path of the liquefied natural gas pipeline 1 in sequence. At least one pressure detector is arranged between two adjacent electric control valves 21. The controller is electrically connected to each electric control valve 21 and each pressure detector respectively. The controller controls the two electric control valves 21 adjacent to the pressure detector that detects the abnormal pressure value, so that the pipe section where the pressure detector that detects the abnormal pressure value is located is closed.

[0033] An indicator light 22 is arranged outside the electric control valve 21. The controller is electrically connected to the indicator light 22. The controller controls each indicator light 22 according to the opening and closing state of each electric control valve 21. When each electric control valve 21 closes the pipe section with the abnormal pressure value, the indicator light 22 of the electric control valve 21 in the closed state is turned on. The arrangement of the indicator light 22 can assist the staff to quickly identify the pipe section to be repaired.

[0034] Specifically, the indicator light 22 includes at least two light colors, one of which is a light color for normal closing of the electric control valve 21, and the other is a light color for abnormal closing due to abnormal pressure value. For example, the green light color is for normal closing of the electric control valve 21, and the normal closing of the electric control valve can be daily maintenance or adjustment of the output power of the fuel supply system; the red light color is for abnormal closing due to abnormal pressure value. The color distinction can assist the staff to quickly distinguish, and facilitate the staff to select a maintenance scheme according to the actual situation in the pipe section.

[0035] The pressure control system for gas fuel supply further comprises a camera 3, a projection lamp 4, a moving mechanism 5 and an adjusting mechanism 6, and the controller is electrically connected with the camera 3, the projection lamp 4, the moving mechanism 5 and the adjusting mechanism 6 respectively; the moving mechanism 5 is drivenly connected with the camera 3 and the adjusting mechanism 6 respectively, and is used to drive the adjusting mechanism 6 and the camera 3 to move along the laying path of the liquefied natural gas pipeline 1 respectively, so that the camera 3 acquires a maintenance image of the pipe section position with abnormal pressure value and sends the maintenance image to the controller; the adjusting mechanism 6 is drivenly connected with the camera 3, and is used to adjust the projection position of the projection lamp 4; the controller is used to control the moving mechanism 5 according to the pressure detector detecting the abnormal pressure value, so that the moving mechanism 5 drives the adjusting mechanism 6 and the camera 3 to move to the pipe section position where the pressure detector detecting the abnormal pressure value is located; the controller is further used to control the adjusting mechanism 6 to adjust the projection position of the projection lamp 4 according to the maintenance image, so that the projection lamp 4 projects the pressure data to the front position of the worker. The cooperation of the adjusting mechanism 6 and the moving mechanism 5 adjusts the positions of the camera 3 and the projection lamp 4, so as to ensure the accuracy of the maintenance image and the projection position.

[0036] Specifically, the controller is used to determine a human body image according to the maintenance image, determine a projectable area according to the maintenance image and the human body image, and control the adjusting mechanism 6 so that the projection lamp 4 projects the pressure value into the projectable area.

[0037] Specifically, the camera 3 is a panoramic camera 3.

[0038] Specifically, the controller is used to control the panoramic camera 3 and the moving mechanism 5 according to the projectable area respectively, so that the panoramic camera 3 shoots at least one auxiliary image of the projectable area at an inclined angle; the controller is used to determine at least one projection point located in the projectable area according to the auxiliary image and the projectable area, and control the adjusting mechanism 6 to adjust the projection lamp 4 to project the pressure value to one of the projection points, so that the interval distance between the projected pressure value and the worker is less than or equal to a preset distance. The projectable area is corrected by the auxiliary image, so as to ensure that the displayed distance is within the preset distance convenient for the worker to observe.

[0039] Specifically, the projection point is a wall surface or a protruding object close to the worker.

[0040] Specifically, the controller is configured to determine the staff position according to the auxiliary image, and determine the straight-line distance from each projection point to the staff position according to the staff position and the position of each projection point; compare each straight-line distance to determine the minimum straight-line distance, and determine the optimal projection point corresponding to the minimum straight-line distance, so that the projection lamp 4 projects the pressure value into the optimal projection point.

[0041] Specifically, the controller determines the area of each projection point according to the projection area and each projection point, and determines whether the area of each projection point is greater than or equal to the preset area; when the area of each projection point is greater than or equal to the preset area, the controller executes the steps of determining the staff position according to the auxiliary image, and determining the straight-line distance from each projection point to the staff position according to the staff position and the position of each projection point; when the area of any projection point is less than the preset area, the controller marks each projection point with an area less than the preset area as a non-projection position, so that the remaining projection points execute the steps of determining the staff position according to the auxiliary image, and determining the straight-line distance from each projection point to the staff position according to the staff position and the position of each projection point. This avoids the area of the projection point being too small, which affects the normal projection of the pressure value.

[0042] Specifically, the projection lamp 4 includes at least two projection colors; the controller is configured to determine whether the projected pressure value is greater than a preset warning value; when the projected pressure value is greater than or equal to the preset warning value, the projected pressure value is one color (for example, red); when the projected pressure value is less than the preset warning value, the projected pressure value is another color (for example, green). Different colors facilitate the staff to intuitively understand the severity of the current pressure anomaly.

[0043] The moving mechanism 5 includes a track 51 and an electric control slide 52; the track 51 is configured to extend along the laying path of the liquefied natural gas pipeline 1; the electric control slide 52 is slidably connected to the track 51, and the electric control slide 52 is respectively connected to the camera 3 and the adjusting mechanism 6; the controller is electrically connected to the electric control slide 52, and the controller is configured to control the electric control slide 52 according to the pressure detector that detects the pressure value anomaly, so that the electric control slide 52 drives the adjusting mechanism 6 and the camera 3 to move to the position of the pressure detector that detects the pressure value anomaly. The electric control slide 52 moves along the track 51, so that the camera 3 and the projection lamp 4 can work at any position of the liquefied natural gas pipeline 1.

[0044] The adjusting mechanism 6 comprises a mounting base 61, a lifter 62, a first connecting frame 63 and a second connecting frame 64, the mounting base 61 is arranged on the side of the electric control sliding base 52 away from the track 51, the projector 4 and the mounting base 61 are arranged on the side of the mounting base 61 away from the electric control sliding base 52, and the lifter 62 is arranged on the side of the projector 4 away from the monitoring mechanism; the first connecting frame 63 is arranged on one end of the projector 4 and the lifter 62, the lifter 62 is hinged to one end of the first connecting frame 63 through a first hinge shaft, and the projector 4 is arranged on the end of the first connecting frame 63 away from the lifter 62; the second connecting frame 64 is arranged between the first connecting frame 63 and the mounting base 61, one end of the second connecting frame 64 is connected to the mounting base 61, and the other end of the second connecting frame 64 is hinged to the first connecting frame 63 through a second hinge shaft; the first hinge shaft and the second hinge shaft are parallel to the extension direction of the track 51; the controller is electrically connected to the lifter 62, and the controller is used for controlling the lifter 62 to adjust the projection position of the projector 4 through the first connecting frame 63 according to the maintenance image.

[0045] Specifically, the second connecting frame 64 is arranged vertically.

[0046] The adjusting mechanism 6 further comprises a lead screw sliding table module 65, the lead screw sliding table module 65 is arranged on the side of the electric control sliding base 52 away from the track 51, the lead screw sliding table module 65 drives the mounting base 61 to move in the direction parallel to the track 51; the controller is electrically connected to the lead screw sliding table module 65, and the controller is used for controlling the lead screw sliding table module 65 and the lifter 62 to cooperate to adjust the projection position of the projector 4 according to the maintenance image respectively. The cooperation of the lifter 62 and the lead screw sliding table module 65 can facilitate the adjustment of the projection direction and the projection position of the projector 4 at any angle.

[0047] A plurality of illuminating lamps 66 are arranged on the side of the mounting base 61 facing the monitoring mechanism, the controller is electrically connected to each illuminating lamp 66, and the controller is used for controlling each illuminating lamp 66 to illuminate the position of the pipe section with the abnormal pressure value when the electric control sliding base 52 moves to the position of the pressure detector detecting the abnormal pressure value. The arrangement of the illuminating lamps 66 can assist the work field of view of the staff and ensure the clarity of the auxiliary image and the maintenance image.

[0048] The above only describes the preferred embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made under the inventive concept of the present application, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A pressure control system for gaseous fuel supply, characterized by, The controller, the communicator, the monitoring mechanism and the control mechanism are electrically connected respectively, the monitoring mechanism is arranged along the laying path of the liquefied natural gas pipeline in sequence, so that the monitoring mechanism monitors the pressure value in each pipe section of the liquefied gas pipeline in sequence and sends to the controller; the control mechanism is arranged along the laying path of the liquefied natural gas pipeline in sequence, so that the control mechanism controls the communication of each pipe section of the liquefied natural gas pipeline, so that the pipe section with abnormal pressure value is closed; the controller is used for controlling the control mechanism according to the pressure value in each pipe section, and after the pipe section with abnormal pressure value is closed, the communicator sends inspection information to the external terminal; The pressure control system for gas fuel supply further comprises a camera, a projection lamp, a moving mechanism and an adjusting mechanism, the controller is electrically connected with the camera, the projection lamp, the moving mechanism and the adjusting mechanism respectively; the moving mechanism drives the camera and the adjusting mechanism respectively, and the moving mechanism drives the adjusting mechanism and the camera to move along the laying path of the liquefied natural gas pipeline respectively, so that the camera obtains the maintenance image of the position of the pipe section with abnormal pressure value and sends the maintenance image to the controller; the adjusting mechanism drives the camera, and the adjusting mechanism is used for adjusting the projection position of the projection lamp; The controller is used for controlling the moving mechanism according to the pressure detector detecting the abnormal pressure value, so that the moving mechanism drives the adjusting mechanism and the camera to move to the position of the pipe section where the pressure detector detecting the abnormal pressure value is located; the controller is also used for controlling the adjusting mechanism to adjust the projection position of the projection lamp according to the maintenance image, so that the projection lamp projects the pressure data to the front position of the worker; The controller is used for determining the human body image according to the maintenance image, determining the projectable area according to the maintenance image and the human body image, and controlling the adjusting mechanism so that the projection lamp projects the pressure value into the projectable area; The controller is used for controlling the panoramic camera and the moving mechanism according to the projectable area respectively, so that the panoramic camera shoots at least one auxiliary image of the projectable area at an inclined angle; the controller is used for determining at least one projection point located in the projectable area according to the auxiliary image and the projectable area, and controlling the adjusting mechanism to project the pressure value to one of the projection points according to each projection point, so that the interval distance between the projected pressure value and the worker is less than or equal to the preset distance; The projection point is a wall surface or a protruding object close to the worker; The moving mechanism comprises a track and an electric control slide, the track is arranged along the laying path of the liquefied natural gas pipeline, the electric control slide is slidably connected to the track, the electric control slide is respectively connected to the camera and the adjusting mechanism, and the controller is electrically connected to the electric control slide, the controller is used for controlling the electric control slide according to the pressure detector detecting the abnormal pressure value, so that the electric control slide drives the adjusting mechanism and the camera to move to the position of the pressure detector detecting the abnormal pressure value. The adjusting mechanism comprises a mounting seat, a lifter, a first connecting frame and a second connecting frame, the mounting seat is arranged on the side of the electric control slide away from the track, the projector and the mounting seat are arranged on the side of the mounting seat away from the electric control slide, and the lifter is arranged on the side of the projector away from the monitoring mechanism; the first connecting frame is arranged on one end of the projector and the lifter, the output end of the lifter is hingedly connected to one end of the first connecting frame through a first hinge shaft, and the projector is arranged on the end of the first connecting frame away from the lifter; the second connecting frame is arranged between the first connecting frame and the mounting seat, one end of the second connecting frame is connected to the mounting seat, and the other end of the second connecting frame is hingedly connected to the first connecting frame through a second hinge shaft; the first hinge shaft and the second hinge shaft are parallel to the extension direction of the track; and the controller is electrically connected to the lifter, and the controller is used for controlling the lifter to adjust the projection position of the projector through the first connecting frame according to the maintenance image.

2. A pressure control system for gaseous fuel supply according to claim 1, characterized in that The control mechanism comprises at least two electric control valves, each electric control valve is arranged along the laying path of the liquefied natural gas pipeline in sequence, so that at least two electric control valves cooperate to close the pipeline with abnormal pressure value; the monitoring mechanism comprises at least one pressure detector, each pressure detector is arranged along the laying path of the liquefied natural gas pipeline in sequence; at least one pressure detector is arranged between two adjacent electric control valves; the controller is electrically connected to each electric control valve and each pressure detector, and the controller is used for controlling two electric control valves adjacent to the pressure detector detecting the abnormal pressure value, so that the pipe section where the pressure detector detecting the abnormal pressure value is located is closed.

3. A pressure control system for gaseous fuel supply according to claim 2, characterized in that The electric control valve is provided with an indicator lamp outside, the controller is electrically connected to the indicator lamp, the controller is used for controlling each indicator lamp according to the opening and closing state of each electric control valve, and when each electric control valve closes the pipe section with abnormal pressure value, the indicator lamp of the electric control valve in the closed state is turned on.

4. A pressure control system for gaseous fuel supply according to any of claims 1-3, characterized in that, The adjusting mechanism further comprises a screw slide module, the screw slide module is arranged on the side of the electric control slide away from the track, the screw slide module is drivingly connected to the mounting seat, the screw slide module drives the mounting seat to move in the direction parallel to the track, the controller is electrically connected to the screw slide module, and the controller is used for controlling the screw slide module and the lifter to cooperate to adjust the projection position of the projector according to the maintenance image.

5. A pressure control system for gaseous fuel supply according to any one of claims 1-3, characterized in that, The installation base is provided with a plurality of lighting lamps on the side facing the monitoring mechanism, and the controller is electrically connected with each lighting lamp, and the controller is used for controlling the lighting of the abnormal pressure value position of each lighting lamp box when the electric control sliding seat moves to the position of the pipe section where the pressure detector detects the abnormal pressure value.

Images