Gas fuel delivery monitoring system and method of servicing

Abstract

The present application relates to the technical fields of gas fuel power, and discloses a gas fuel delivery monitoring system and a maintenance method, which comprises a first pipe body, a second pipe body, a first pressure sensor, a second pressure sensor and a combustible gas detector, and the first pipe body is sleeved on the outer periphery of the second pipe body, the second pipe body is internally communicated with gas fuel, the first pressure sensor is connected with the first pipe body, the second pressure sensor is connected with the second pipe body, the combustible gas detector is arranged between the first pipe body and the second pipe body, and a control assembly is electrically connected with the first pressure sensor and the second pressure sensor, wherein the air pressure between the first pipe body and the second pipe body is greater than the air pressure in the second pipe body. The present application provides a gas fuel delivery monitoring system, inert gas is communicated between the first pipe body and the second pipe body, even if the inner pipe appears gas leakage phenomenon, the gas will not escape from the damaged part of the inner pipe, and after the leakage is monitored, timely maintenance intervention can be carried out to ensure safety.

Description

Technical Field

[0001] This invention relates to the field of gas fuel power technology, and in particular to a gas fuel transportation monitoring system and maintenance method. Background Technology

[0002] LNG ships now employ dual-fuel technology, powering both medium-speed generators and low-speed diesel engines, and they commonly use double-walled pipe systems to transport the gas.

[0003] In existing technology, the fuel gas mainly flows in the inner pipe of the system, while fresh air from the outside circulates in the gap between the outer and inner pipes of the double-walled system, ensuring smooth airflow. If the fuel gas in the inner pipe leaks, the leaked gas will be directly discharged into this annular area without penetrating into the cabin, a design that significantly enhances cabin safety.

[0004] Obviously, if a gas leak occurs, although it will not be released into the engine compartment, the gas inside the external pipe mixed with air could easily form an explosion source, posing a significant safety hazard. Summary of the Invention

[0005] The purpose of this invention is to provide a gaseous fuel delivery monitoring system in which an inert gas is introduced between a first pipe and a second pipe, and the gas pressure between the first and second pipes is kept greater than the gas pressure inside the second pipe. Even if a gas leak occurs in the second pipe, due to the pressure difference, the gas will not escape rapidly from the damaged part of the second pipe, but will only slowly diffuse into the first pipe. After the leak is detected, the staff can carry out maintenance intervention in a timely manner to ensure safety.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] The first aspect of the present invention provides a gaseous fuel delivery monitoring system, comprising:

[0008] The GVU valve assembly has a first gas passage and a second gas passage. The first gas passage is sleeved on the outer periphery of the second gas passage, and the first gas passage and the second gas passage are not connected to each other.

[0009] A first tube body, which is connected to the first gas channel, and an inert gas is passed through the inside of the first tube body;

[0010] The second tube is connected to the second gas passage. The first tube is sleeved on the outer periphery of the second tube, and the second tube contains gaseous fuel.

[0011] A first pressure sensor is connected to the first tube body;

[0012] A second pressure sensor is connected to the second tube body;

[0013] A combustible gas detector, wherein the combustible gas detector is disposed between the first tube and the second tube;

[0014] A control component, which is electrically connected to the first pressure sensor and the second pressure sensor;

[0015] The air pressure between the first tube and the second tube is greater than the air pressure inside the second tube.

[0016] Furthermore, the gas fuel delivery monitoring system also includes a first valve, one end of which is connected to the first pipe body and the other end is connected to external air; and a second valve, one end of which is connected to the first pipe body and the other end is connected to an inert gas source.

[0017] Furthermore, the gas fuel delivery monitoring system also includes an audible and visual alarm and a status indicator, and the control component is electrically connected to the first valve, the second valve, the audible and visual alarm, and the status indicator.

[0018] Furthermore, the status indicator has:

[0019] Status 1: The system is working normally;

[0020] Status 2: System malfunction; abnormal pressure occurs within the first tube.

[0021] Status 3: System failure, the first tube body is damaged;

[0022] Status 4: System failure, the second tube body is damaged.

[0023] Furthermore, the control component is configured to:

[0024] The preset pressure inside the second tube is recorded as P1, the value of the second pressure sensor is recorded as P2, the minimum working pressure inside the first tube is recorded as P3, and the value of the first pressure sensor is recorded as P4.

[0025] When the system is working normally, P4≥P3, P1≈P2. At this time, both the first valve and the second valve are in the closed state, and the status indicator displays the first state.

[0026] After the system has been working for a long time, P4 may decrease until P4 < P3, at which point the status indicator displays the second state. At this time, the second valve opens until P4 ≥ P3, at which point the second valve closes, and the status indicator displays the first state.

[0027] When the first tube body is damaged, P4 drops rapidly. At this time, both the first valve and the second valve are closed. After P4 drops to P4=P2, when P4 continues to drop to atmospheric pressure, the status indicator displays the third state, and the audible and visual alarm flashes and sounds an alarm.

[0028] When the second pipe body is damaged, P4 drops rapidly. At this time, both the first valve and the second valve are closed, and the combustible gas detector detects a gaseous fuel leak. After P4 drops to P4=P2, it remains unchanged. The status indicator displays the fourth state, and the audible and visual alarm flashes and sounds an alarm.

[0029] A second aspect of the present invention provides a maintenance method based on the gas fuel delivery monitoring system described above:

[0030] When the GVU valve assembly needs maintenance, the control component controls the first valve to open and the second valve to close until P4 equals atmospheric pressure. At this time, the GVU valve body can be opened for maintenance.

[0031] After the GVU valve group is repaired, it is closed. The control component controls the first valve body to close and the second valve body to open until P4≥P3. The status indicator displays the status one, and the gas fuel delivery monitoring system can resume normal operation.

[0032] Compared with the prior art, the gas fuel transportation monitoring system and maintenance method of this invention have the following advantages: Inert gas is introduced between the first pipe and the second pipe, and the gas pressure between the first pipe and the second pipe is kept greater than the gas pressure inside the second pipe. Even if there is a gas leak in the second pipe, due to the pressure difference, the gas will not escape rapidly from the damaged part of the second pipe, but will only slowly diffuse into the first pipe. After the combustible gas detector detects the leak, the staff can carry out maintenance intervention in time to ensure safety. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the gas fuel delivery monitoring system according to an embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram illustrating the effect of the indicator in the gas fuel delivery monitoring system according to an embodiment of the present invention;

[0035] In the diagram, 1 represents the GVU valve assembly;

[0036] 2. The first tube body;

[0037] 3. The second tube body;

[0038] 4. First pressure sensor;

[0039] 5. Second pressure sensor;

[0040] 6. Combustible gas detector;

[0041] 7. Control components;

[0042] 8. First valve;

[0043] 9. Second valve;

[0044] 10. Audible and visual alarm;

[0045] 11. Status indicator. Detailed Implementation

[0046] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0047] In the description of this invention, the terms "upper," "lower," "left," "right," "front," "rear," "inner," "outer," "lateral," and "longitudinal," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation, and therefore should not be construed as limiting this utility model. Those skilled in the art can understand the specific meaning of these terms in this invention according to the specific circumstances.

[0048] In the description of this invention, the terms "provided with," "set up," "connected," and "placed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0049] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0050] The technical solution of the present invention will be further described below with reference to the embodiments and accompanying drawings.

[0051] The first aspect of the present invention provides a gaseous fuel delivery monitoring system, such as Figure 1As shown, it includes:

[0052] GVU valve assembly 1 has a first gas passage and a second gas passage. The first gas passage is sleeved on the outer periphery of the second gas passage, and the first gas passage and the second gas passage are not connected to each other.

[0053] The first tube 2 is connected to the first gas channel, and an inert gas flows through the inside of the first tube 2.

[0054] The second tube 3 is connected to the second gas passage. The first tube 2 is fitted around the outer periphery of the second tube 3. The second tube 3 contains gaseous fuel.

[0055] First pressure sensor 4, first pressure sensor 4 is connected to first tube 2;

[0056] The second pressure sensor 5 is connected to the second tube body 3;

[0057] Combustible gas detector 6 is disposed between the first tube 2 and the second tube 3;

[0058] Control component 7 is electrically connected to the first pressure sensor 4 and the second pressure sensor 5;

[0059] The air pressure between the first tube 2 and the second tube 3 is greater than the air pressure inside the second tube 3.

[0060] Based on the above technical solution, an inert gas is introduced between the first pipe body 2 and the second pipe body 3, and the gas pressure between the first pipe body 2 and the second pipe body 3 is kept greater than the gas pressure inside the second pipe body 3. Even if there is a gas leak in the second pipe body 3, due to the gas pressure difference, the gas will not escape rapidly from the damaged part of the second pipe body 3, but will only slowly diffuse into the first pipe body 2. After the combustible gas detector 6 detects the leak, the staff can carry out maintenance intervention in time to ensure safety.

[0061] Preferably, the gaseous fuel delivery monitoring system further includes a first valve 8, one end of which is connected to the first pipe body 2, and the other end is connected to external air; and a second valve 9, one end of which is connected to the first pipe body 2, and the other end is connected to an inert gas source. This allows for timely adjustment of the inert gas pressure based on the pressure value of the first pressure sensor 4, preventing excessive or insufficient pressure. If the pressure is too high, and the second pipe body 3 is damaged, inert gas may be forced into it, increasing the gas delivery speed within the second pipe body 3. This can cause the inert gas to burn along with the gaseous fuel, resulting in incomplete combustion and the release of harmful gases that pollute the environment. If the pressure is too low, the gaseous fuel may escape into the first pipe body 2, making subsequent gas treatment more complicated.

[0062] More preferably, the gas fuel delivery monitoring system also includes an audible and visual alarm 10 and a status indicator 11. The control component 7 is electrically connected to the first valve 8, the second valve 9, the audible and visual alarm 10, and the status indicator 11. The audible and visual alarm and the status indicator 11 can promptly remind personnel that problems with the gas fuel delivery monitoring system require handling and maintenance.

[0063] More preferably, such as Figure 2 As shown, the status indicator 11 has:

[0064] Status 1: The system is working normally;

[0065] Status 2: System malfunction, abnormal pressure occurs in the first pipe body 2;

[0066] State 3: System failure, first tube 2 is damaged;

[0067] Status 4: System failure, second tube 3 is damaged.

[0068] The status indicator 11 provides feedback on different states of the gas fuel delivery detection system in states one, two, three, and four, enabling staff to have a preliminary understanding of the on-site situation without having to go to the site to assess the damage, which is beneficial for completing maintenance in a short time.

[0069] More preferably, the control component 7 is configured as follows:

[0070] The preset pressure inside the second tube 3 is recorded as P1, the value of the second pressure sensor 5 is recorded as P2, the minimum working pressure inside the first tube 2 is recorded as P3, and the value of the first pressure sensor 4 is recorded as P4.

[0071] When the system is working normally, P4≥P3, P1≈P2. At this time, both the first valve 8 and the second valve 9 are in the closed state, and the status indicator 11 displays status one.

[0072] After the system has been working for a long time, P4 may decrease until P4 < P3. At this time, the status indicator 11 displays status two. At this time, the second valve 9 opens until P4 ≥ P3. Then the second valve 9 closes and the status indicator 11 displays status one.

[0073] When the first tube 2 is damaged, P4 drops rapidly. At this time, both the first valve 8 and the second valve 9 are closed. After P4 drops to P4=P2, when P4 continues to drop to atmospheric pressure, the status indicator 11 displays status three, and the audible and visual alarm 10 flashes and sounds an alarm.

[0074] When the second pipe body 3 is damaged, P4 drops rapidly. At this time, both the first valve 8 and the second valve 9 are closed, and the combustible gas detector 6 detects a gaseous fuel leak. After P4 drops to P4=P2, it remains unchanged. The status indicator 11 displays status four, and the audible and visual alarm 10 flashes and sounds an alarm.

[0075] Since there is no inert gas leakage when the system is working normally, but considering that a small amount of inert gas may escape into the atmosphere through gaps in some structural connections, the pressure of the inert gas may drop after the system has been working for a long time. Therefore, the control component 7 monitors in real time and controls the second valve 9 to replenish the inert gas between the first pipe 2 and the second pipe 3 in a timely manner to maintain the pressure.

[0076] Specifically, the detection end of the combustible gas detector 6 is arranged around the outer periphery of the second tube 3.

[0077] When the second tube 3 is damaged, inert gas enters the second tube 3 through the damaged point, causing an initial drop. Although the gas pressure between the first tube 2 and the second tube 3 is greater than the gas pressure inside the second tube 3, a small portion of the gaseous fuel will diffuse between the first tube 2 and the second tube 3 due to diffusion. The combustible gas detector 6 can detect this gas leak and can carry out timely repairs when the leakage is small, thus avoiding safety problems.

[0078] A second aspect of the present invention provides a maintenance method based on the above-described gas fuel delivery monitoring system:

[0079] When the GVU valve assembly 1 needs to be inspected, the control component 7 controls the first valve 8 to open and the second valve 9 to close, and P4 until it is equal to atmospheric pressure. At this time, the GVU valve body can be opened for inspection.

[0080] After the GVU valve group 1 is repaired, it is closed. The control component 7 controls the first valve body to close and the second valve body to open until P4≥P3. The status indicator 11 displays status one, and the gas fuel delivery monitoring system can resume normal operation.

[0081] Before overhauling GVU valve assembly 1, purge the inert gas to prevent excessive inert gas pressure when opening GVU valve assembly 1, which could cause injury to workers during maintenance.

[0082] In summary, the embodiments of the present invention provide a gaseous fuel transportation monitoring system and maintenance method. Inert gas is introduced between the first pipe body 2 and the second pipe body 3, and the gas pressure between the first pipe body 2 and the second pipe body 3 is maintained to be greater than the gas pressure inside the second pipe body 3. Even if gas leakage occurs in the second pipe body 3, due to the gas pressure difference, the gas will not escape rapidly from the damaged part of the second pipe body 3, but will only slowly diffuse into the first pipe body 2. After the combustible gas detector 6 detects the leak, the staff can perform maintenance intervention in a timely manner to ensure safety.

[0083] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A gaseous fuel delivery monitoring system characterized by, The application relates to a gas fuel delivery monitoring system. The system comprises: a GVU valve group, the GVU valve group having a first gas passage and a second gas passage, the first gas passage being sleeved on the outer periphery of the second gas passage, the first gas passage and the second gas passage being not communicated with each other; a first pipe body, the first pipe body being communicated with the first gas passage, inert gas being communicated in the first pipe body; a second pipe body, the second pipe body being communicated with the second gas passage, the first pipe body being sleeved on the outer periphery of the second pipe body, gas fuel being communicated in the second pipe body; a first pressure sensor, the first pressure sensor being connected with the first pipe body; a second pressure sensor, the second pressure sensor being connected with the second pipe body; a combustible gas detector, the combustible gas detector being arranged between the first pipe body and the second pipe body; a control assembly, the control assembly being electrically connected with the first pressure sensor and the second pressure sensor; wherein the air pressure between the first pipe body and the second pipe body is greater than the air pressure in the second pipe body; The system further comprises: a first valve, one end of the first valve being communicated with the first pipe body, and the other end being communicated with external air; a second valve, one end of the second valve being communicated with the first pipe body, and the other end being communicated with an inert gas source; a sound-light alarm and a state indicator, the control assembly being electrically connected with the first valve, the second valve, the sound-light alarm and the state indicator; the state indicator has: state one: the system is normally working; state two: the system is abnormal, and pressure abnormality occurs in the first pipe body; state three: the system is invalid, and the first pipe body is damaged; state four: the system is invalid, and the second pipe body is damaged; The preset pressure in the second pipe body is denoted as , the value of the second pressure sensor is denoted as , the lowest working pressure in the first pipe body is denoted as , and the value of the first pressure sensor is denoted as ; When the system is working normally, ≥ , ≈ At this time, the first valve and the second valve are both in the closed state, and the state indicator displays state one. When the system has been working for a long time, a decrease can occur until < the state indicator shows state two, at which time the second valve is opened until ≥ the second valve is closed and the state indicator shows state one; When the first pipe body is broken, rapidly, at which time both the first valve and the second valve are closed, to = later, continuing to decrease to atmospheric pressure, the state indicator displays state three, and the audible and visual alarm flashes and emits an alarm. When the second tube is broken, Rapidly decreases, at this time, the first valve and the second valve are closed, and the combustible gas detector detects the gas fuel leakage, Decreases to = After, Remains unchanged, the state indicator displays state four, the audible and visual alarm flashes and emits an alarm. the control assembly is configured to:

2. A maintenance method based on the gas fuel delivery monitoring system in claim 1. When the GVU valve group (1) needs to be overhauled, the control assembly (7) controls the first valve (8) to open and the second valve (9) to close, until equal to atmospheric pressure, at which time the GVU valve body can be opened for overhaul; When the GVU valve group (1) is overhauled, the GVU valve group (1) is closed, the control assembly (7) controls the first valve (8) to be closed and the second valve (9) to be opened until ≥ the state indicator (11) displays the state one, and the gas fuel delivery monitoring system can return to normal operation.

Images