Method and system for pressure vessel inspection

Abstract

This application provides a pressure vessel maintenance method and system. The method includes: an unlocking device sending a first unlocking command to a first locking device; the unlocking device sending a detection command to a pressure detection device and receiving a pressure relief completion command from the pressure detection device; and the unlocking device, upon receiving the pressure relief completion command, sending a second unlocking command to a second locking device to unlock the manhole door. In this embodiment, the pressure vessel is first depressurized via a pressure relief valve, and then the pressure value of the pressure vessel is detected by a pressure detection device. If the pressure value of the pressure vessel is lower than a preset safe pressure value, the manhole door is unlocked, allowing maintenance personnel to perform maintenance on the pressure vessel. The linkage between the first locking device, the pressure detection device, and the second locking device standardizes the maintenance process, thereby preventing misoperation or violation by maintenance personnel and improving the safety of pressure vessel maintenance.

Description

Technical Field

[0001] This application relates to the field of equipment maintenance technology, and in particular to a pressure vessel maintenance method and a pressure vessel maintenance system. Background Technology

[0002] Pressure vessels are sealed devices that hold gases or liquids under pressure, playing a vital role in many fields, including industry, civil use, and military applications. To prevent accidents, pressure vessels require inspection and maintenance.

[0003] Currently, the usual procedure for inspecting and maintaining pressure vessels is to first open the pressure relief valve to depressurize the pressure vessel. After depressurization is complete, the manhole door is opened, and the maintenance personnel close the manhole door after completing the inspection and maintenance of the pressure vessel.

[0004] From the above, we can conclude that: 1. The maintenance process of pressure vessels relies too heavily on manual labor. Accidents can easily occur if maintenance personnel make mistakes or violate regulations. Therefore, there are safety hazards in the maintenance process of pressure vessels.

[0005] 2. Traditional valves or manholes are locked using individual locking mechanisms, which are not interconnected. Management reports to or receives operational orders from superiors after the operation is completed, which may lead to untimely, imprecise, or false alarms. Furthermore, valve / manhole operations require pre-operation such as reducing air pressure or cutting off flow, but there is no robust anti-misoperation system in actual operation. Summary of the Invention

[0006] The main purpose of this application is to provide a pressure vessel maintenance method and system, which aims to solve the technical problems of pressure vessel maintenance relying too much on manual labor and posing safety hazards.

[0007] To achieve the above objectives, this application provides a pressure vessel maintenance method. The pressure vessel maintenance method is applied to a pressure vessel maintenance system, which includes an unlocking device, a pressure relief valve, a manhole door, and a pressure detection device. The pressure relief valve includes a first locking device, and the manhole door includes a second locking device. The first locking device controls the pressure relief valve to be in a locked or unlocked state, and the second locking device controls the manhole door to be in a locked or unlocked state. The pressure vessel maintenance method includes: The unlocking device sends a first unlocking command to the first locking device to release the pressure relief valve from locking and open the pressure relief valve to release pressure from the pressure vessel. The unlocking device sends a detection command to the pressure detection device and receives a pressure relief completion command from the pressure detection device. The pressure relief completion command is used to indicate that the pressure value of the pressure vessel is lower than the preset safe pressure value. Upon receiving the depressurization completion command, the unlocking device sends a second unlocking command to the second locking device to unlock the manhole door, allowing maintenance personnel to open the manhole door for maintenance of the pressure vessel.

[0008] Optionally, the unlocking device sends a first unlocking command to the first locking device to release the pressure relief valve from locking and open the pressure relief valve to relieve pressure on the pressure vessel, including: The unlocking device acquires the identity identifier sent by the first locking device; The unlocking device verifies the identity identifier and, if the verification is successful, sends a first unlocking command to the first locking device to put the pressure relief valve in the unlocked state. The pressure relief valve is opened according to the valve adjustment operation of the maintenance personnel to relieve pressure on the pressure vessel.

[0009] Optionally, the pressure vessel maintenance system also includes a management terminal; The pressure vessel maintenance method also includes: The first locking device uploads first status information and second status information to the management terminal. The first status information is used to characterize the working status of the first locking device, and the second status information is used to characterize the working status of the pressure relief valve.

[0010] Optionally, the unlocking device sends a detection command to the pressure detection device and receives a pressure relief completion command from the pressure detection device, including: The unlocking device acquires the identity identifier sent by the pressure detection device; The unlocking device verifies the identity identifier, and if the verification is successful, sends a detection command to the pressure detection device so that the pressure detection device can detect the air pressure value of the pressure vessel. When the pressure detection device detects that the pressure value of the pressure vessel is lower than the preset safe pressure value, it sends a pressure relief completion command to the unlocking device.

[0011] Optionally, the pressure vessel maintenance system also includes a management terminal; The pressure vessel maintenance method also includes: The pressure detection device uploads the air pressure value of the pressure vessel to the management terminal.

[0012] Optionally, upon receiving the depressurization completion command, the unlocking device sends a second unlocking command to the second locking device to unlock the manhole door, allowing maintenance personnel to open the manhole door for maintenance of the pressure vessel. The method further includes: When maintenance personnel complete the maintenance of the pressure vessel, the unlocking device sends a locking command to the second locking device to lock the manhole door. The first locking device closes the pressure relief valve according to the valve locking operation performed by the maintenance personnel.

[0013] Optionally, sending a second unlocking command to the second locking device to unlock the manhole door includes: The unlocking device acquires the identity identifier sent by the second locking device; The unlocking device verifies the identity identifier and, if the verification is successful, sends a second unlocking command to the second locking device.

[0014] Optionally, the pressure vessel maintenance system also includes a management terminal; The pressure vessel maintenance method also includes: The second locking device uploads third status information to the management terminal, which is used to characterize the working status of the manhole door.

[0015] In addition, to achieve the above objectives, this application also provides a pressure vessel maintenance system, which includes an unlocking device, a pressure relief valve, a manhole door, and a pressure detection device. The pressure relief valve includes a first locking device, and the manhole door includes a second locking device. The first locking device is used to control the pressure relief valve to be in a locked or unlocked state, and the second locking device is used to control the manhole door to be in a locked or unlocked state. The unlocking device is used to send a first unlocking command to the first locking device to release the pressure relief valve from locking and to open the pressure relief valve to release pressure from the pressure vessel. Send a detection command to the pressure detection device and receive a pressure relief completion command sent by the pressure detection device. The pressure relief completion command is used to indicate that the pressure value of the pressure vessel is lower than the preset safe pressure value. Upon receiving the pressure relief completion command, a second unlocking command is sent to the second locking device to unlock the manhole door, allowing maintenance personnel to open the manhole door for maintenance of the pressure vessel.

[0016] Compared with the prior art, the embodiments of this application have the following main advantages: This application provides a pressure vessel maintenance method and system. The method includes: an unlocking device sending a first unlocking command to a first locking device to release the pressure relief valve from locking and open the pressure relief valve to release pressure on the pressure vessel; the unlocking device sending a detection command to a pressure detection device and receiving a pressure relief completion command from the pressure detection device, the pressure relief completion command indicating that the pressure value of the pressure vessel is lower than a preset safe pressure value; and, upon receiving the pressure relief completion command, the unlocking device sending a second unlocking command to a second locking device to unlock the manhole door, allowing maintenance personnel to open the manhole door for pressure vessel maintenance. This application first releases pressure on the pressure vessel through a pressure relief valve, then detects the pressure value of the pressure vessel through a pressure detection device. If the pressure value of the pressure vessel is lower than a preset safe pressure value, the manhole door is unlocked, allowing maintenance personnel to perform maintenance on the pressure vessel. In other words, during the maintenance of pressure vessels, the linkage between the first locking device, the pressure detection device, and the second locking device ensures that the pressure inside the pressure vessel remains within a safe range before maintenance can proceed. This standardizes the maintenance process, prevents misoperation or violations by maintenance personnel, and thus improves the safety of pressure vessel maintenance. Furthermore, by establishing the linkage between the first locking device, the pressure detection device, and the second locking device, the reliance on manual labor during pressure vessel maintenance is reduced, preventing accidents caused by misoperation or violations by maintenance personnel, thereby eliminating potential safety hazards during pressure vessel maintenance. Attached Figure Description

[0017] To more clearly illustrate the solutions in this application, the accompanying drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a flowchart of the pressure vessel maintenance method provided in the embodiments of this application; Figure 2 This is an application architecture diagram of the pressure vessel maintenance method provided in the embodiments of this application; Figure 3 This is one of the structural schematic diagrams of the pressure vessel maintenance system provided in the embodiments of this application; Figure 4 This is the second structural schematic diagram of the pressure vessel maintenance system provided in the embodiments of this application. Detailed Implementation

[0019] The pressure vessel maintenance method provided in this application is applied to a pressure vessel maintenance system. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application. The terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a particular order.

[0020] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0021] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0022] Please refer to Figure 1 The diagram shows a flowchart of an embodiment of the pressure vessel maintenance method proposed in this application.

[0023] The pressure vessel maintenance method provided in this application is applied to a pressure vessel maintenance system. The pressure vessel maintenance system includes an unlocking device, a pressure relief valve, a manhole door, and a pressure detection device. The pressure relief valve includes a first locking device, and the manhole door includes a second locking device. The first locking device is used to control the pressure relief valve to be in a locked or unlocked state, and the second locking device is used to control the manhole door to be in a locked or unlocked state. The pressure vessel maintenance method provided in this application includes the following steps: S110, the unlocking device sends a first unlocking command to the first locking device to release the pressure relief valve from locking and open the pressure relief valve to release pressure from the pressure vessel.

[0024] In an optional embodiment, the unlocking device is an unlocking key with communication function, and the first locking device is also called a valve locking device.

[0025] In this step, the unlocking device sends a first unlocking command to the first locking device. In one application scenario, the unlocking key is inserted into the keyhole of the first locking device, and the first unlocking command is sent to the first locking device.

[0026] Upon receiving the first unlocking command, the first locking device is in the unlocked state, at which point the pressure relief valve is in the operable unlocked state, thereby opening the pressure relief valve to release pressure from the pressure vessel.

[0027] S120, the unlocking device sends a detection command to the pressure detection device and receives a pressure relief completion command sent by the pressure detection device. The pressure relief completion command is used to indicate that the pressure value of the pressure vessel is lower than the preset safe pressure value.

[0028] In this step, the unlocking device sends a detection command to the pressure detection device. In one application scenario, the unlocking key is inserted into the lock hole of the pressure detection device, and a detection command is sent to the pressure detection device.

[0029] After receiving the detection command, the pressure detection device detects the air pressure value of the pressure vessel and sends a pressure relief completion command to the unlocking device based on the monitored air pressure value. The pressure relief completion command is used to indicate that the air pressure value of the pressure vessel is lower than the preset safe air pressure value.

[0030] S130, upon receiving the depressurization completion command, the unlocking device sends a second unlocking command to the second locking device to unlock the manhole door, so that maintenance personnel can open the manhole door to inspect the pressure vessel.

[0031] In an alternative embodiment, the first locking device described above is also referred to as a manhole door locking device.

[0032] In this step, upon receiving the depressurization completion command, the unlocking device sends a second unlocking command to the second locking device. Upon receiving the second unlocking command, the second locking device is in an operable unlocked state. At this point, maintenance personnel can remove the manhole door nut, disassemble the manhole door, and then inspect the pressure vessel. After the manhole door is unlocked, the unlocking key can be removed, and the second locking device remains unlocked to prevent accidental operation by maintenance personnel.

[0033] In this embodiment, the pressure vessel is first depressurized via a pressure relief valve, and then the pressure value of the pressure vessel is detected by a pressure detection device. If the pressure value is lower than a preset safe pressure value, the manhole door is unlocked to allow maintenance personnel to inspect the pressure vessel. In other words, during pressure vessel maintenance, the linkage between the first locking device, the pressure detection device, and the second locking device ensures that the pressure value inside the pressure vessel is within the safe pressure range before maintenance can proceed. This standardizes the maintenance process, prevents misoperation or violations by maintenance personnel, and thus improves the safety of pressure vessel maintenance. Furthermore, by setting up the linkage between the first locking device, the pressure detection device, and the second locking device, the reliance on manual labor during pressure vessel maintenance is reduced, avoiding accidents caused by misoperation or violations by maintenance personnel, thereby eliminating potential safety hazards during pressure vessel maintenance.

[0034] Optionally, the unlocking device sends a first unlocking command to the first locking device to release the pressure relief valve from locking and open the pressure relief valve to relieve pressure on the pressure vessel, including: The unlocking device acquires the identity identifier sent by the first locking device; The unlocking device verifies the identity identifier and, if the verification is successful, sends a first unlocking command to the first locking device to put the pressure relief valve in the unlocked state. The pressure relief valve is opened according to the valve adjustment operation of the maintenance personnel to relieve pressure on the pressure vessel.

[0035] In an optional application scenario, the unlocking key is inserted into the keyhole of the first locking device, and the first locking device sends an identification identifier to the unlocking device. Optionally, the identification identifier can be a radio frequency identification (RFID) code.

[0036] The unlocking device authenticates the identity identifier and, if the authentication is successful, sends a first unlocking command to the first locking device. Optionally, the unlocking device may pre-store verified identity identifiers and compare them with the identity identifier sent by the first locking device; if they match, the authentication is successful. It should be understood that other authentication methods may also be used, and no specific limitation is made here.

[0037] Upon receiving the first unlocking command, the first locking device is in the unlocked state. At this time, maintenance personnel can perform valve adjustment operations to open the pressure relief valve and depressurize the pressure vessel. After depressurization is completed, the unlocking key is removed, causing the first locking device to return to the locked state.

[0038] In this embodiment, by setting up the linkage between the first locking device and the unlocking device, the pressure relief valve can be adjusted to relieve pressure on the pressure vessel only after the identity of the first locking device is verified, thus standardizing the maintenance process.

[0039] Optionally, the pressure vessel maintenance system also includes a management terminal; The pressure vessel maintenance method also includes: The first locking device uploads first status information and second status information to the management terminal. The first status information is used to characterize the working status of the first locking device, and the second status information is used to characterize the working status of the pressure relief valve.

[0040] In this embodiment, the first locking device is communicatively connected to the management terminal and uploads first status information and second status information to the management terminal. The first status information characterizes the working status of the first locking device, and the second status information characterizes the working status of the pressure relief valve. This allows maintenance personnel to promptly ascertain the status of the first locking device and the pressure relief valve through the management terminal.

[0041] Optionally, the unlocking device sends a detection command to the pressure detection device and receives a pressure relief completion command from the pressure detection device, including: The unlocking device acquires the identity identifier sent by the pressure detection device; The unlocking device verifies the identity identifier, and if the verification is successful, sends a detection command to the pressure detection device so that the pressure detection device can detect the air pressure value of the pressure vessel. When the pressure detection device detects that the pressure value of the pressure vessel is lower than the preset safe pressure value, it sends a pressure relief completion command to the unlocking device.

[0042] In one optional application scenario, the unlocking key is inserted into the lock hole of the pressure detection device, and a detection command is sent to the pressure detection device. Upon receiving the detection command, the pressure detection device detects the air pressure value of the pressure vessel, and if the detected air pressure value of the pressure vessel is lower than the preset safe air pressure value, it sends a depressurization completion command to the unlocking device.

[0043] In this embodiment, by setting up a linkage between the pressure detection device and the unlocking device, the unlocking device sends a detection command to the pressure detection device, which detects the air pressure value of the pressure vessel. When the detected air pressure value of the pressure vessel is lower than the preset safe air pressure value, that is, when the pressure vessel has been depressurized to the safe air pressure value, the unlocking device sends a depressurization completion command. After receiving the depressurization completion command, the maintenance personnel perform subsequent maintenance steps, thereby improving the safety of pressure vessel maintenance.

[0044] Optionally, the pressure vessel maintenance system also includes a management terminal; The pressure vessel maintenance method also includes: The pressure detection device uploads the air pressure value of the pressure vessel to the management terminal.

[0045] In this embodiment, the pressure detection device is communicatively connected to the management terminal and uploads the pressure value of the pressure vessel to the management terminal, so that maintenance personnel can know the pressure value of the pressure vessel in a timely manner through the management terminal.

[0046] Optionally, upon receiving the depressurization completion command, the unlocking device sends a second unlocking command to the second locking device to unlock the manhole door, allowing maintenance personnel to open the manhole door for maintenance of the pressure vessel. The method then further includes: When maintenance personnel complete the maintenance of the pressure vessel, the unlocking device sends a locking command to the second locking device to lock the manhole door. The first locking device closes the pressure relief valve according to the valve locking operation performed by the maintenance personnel.

[0047] In this embodiment, after the maintenance personnel have completed the maintenance of the pressure vessel and confirmed that no personnel are remaining, they close the manhole door and lock it with a nut; then they insert the unlocking key into the lock hole of the second locking device and send a locking command to the second locking device so that the manhole door is in a locked state.

[0048] Optionally, when the unlocking key is inserted into the lock hole of the second locking device, the unlocking key receives an identity token sent by the second locking device, and sends a locking command to the second locking device if the identity token is verified.

[0049] Furthermore, maintenance personnel can insert the unlocking key into the lock hole of the first locking device to lock the first locking device and close the pressure relief valve.

[0050] In this embodiment, by setting up the linkage between the second locking device and the unlocking device, when the maintenance of the pressure vessel is completed, the unlocking device sends a locking command to the second locking device to lock the manhole door, thereby standardizing the maintenance process.

[0051] Optionally, sending a second unlocking command to the second locking device to unlock the manhole door includes: The unlocking device acquires the identity identifier sent by the second locking device; The unlocking device verifies the identity identifier and, if the verification is successful, sends a second unlocking command to the second locking device.

[0052] In an optional application scenario, the unlocking key is inserted into the lock hole of the second locking device, the second locking device sends an identity identifier to the unlocking device, the unlocking device verifies the identity identifier, and if the verification is successful, sends a second unlocking command to the second locking device.

[0053] One optional authentication method involves the unlocking device pre-storing a verified identity identifier. The unlocking device compares the verified identity identifier with the identity identifier sent by the second locking device. If they match, the authentication is successful. It should be understood that other authentication methods can also be used, and no specific limitation is made here.

[0054] In this embodiment, by setting up a linkage between the second locking device and the unlocking device, the second locking device is unlocked only after identity verification, thereby standardizing the maintenance process.

[0055] Optionally, the pressure vessel maintenance system also includes a management terminal; The pressure vessel maintenance method also includes: The second locking device uploads third status information to the management terminal, which is used to characterize the working status of the manhole door.

[0056] In this embodiment, the second locking device is communicatively connected to the management terminal and uploads third status information representing the working status of the manhole to the management terminal, so that maintenance personnel can know the working status of the manhole in a timely manner through the management terminal.

[0057] Optionally, the second locking device sends an identity identifier to the unlocking device while simultaneously sending a third status information to the unlocking device.

[0058] For a better understanding of the overall technical solution, please refer to [link / reference]. Figure 2 , Figure 2 This is an application architecture diagram of the pressure vessel maintenance method provided in the embodiments of this application. For example... Figure 2 As shown, the first locking device sends an identity identifier to the unlocking device, which verifies the identity based on the identifier. After successful verification, the unlocking device sends a first unlocking command to the first locking device, and the pressure relief valve releases pressure on the pressure vessel based on the operation of the maintenance personnel.

[0059] The unlocking device sends a detection command to the pressure detection device. The pressure detection device responds to the detection command by detecting the air pressure value of the pressure vessel. If the detected air pressure value is lower than the preset safe air pressure value, it sends a depressurization completion command to the unlocking device.

[0060] The second locking device sends an identification identifier to the unlocking device. The unlocking device verifies the identity based on this identifier. After successful verification, the unlocking device sends a second unlocking command to the second locking device, allowing maintenance personnel to perform maintenance on the pressure vessel. The second locking device also sends its own status information to the unlocking device.

[0061] Please see Figure 3 This application provides a pressure vessel maintenance system, which includes an unlocking device 310, a pressure relief valve 320, a manhole door 330, and a pressure detection device 340. The pressure relief valve 320 includes a first locking device 321, and the manhole door 330 includes a second locking device 331. The first locking device 321 is used to control the pressure relief valve 320 to be in a locked or unlocked state, and the second locking device 331 is used to control the manhole door 330 to be in a locked or unlocked state. The unlocking device 310 is used to send a first unlocking command to the first locking device 321 to release the pressure relief valve 320 from locking and to open the pressure relief valve 320 to relieve pressure on the pressure vessel. Send a detection command to the pressure detection device 340 and receive a pressure relief completion command sent by the pressure detection device 340. The pressure relief completion command is used to indicate that the pressure value of the pressure vessel is lower than the preset safe pressure value. Upon receiving the pressure relief completion command, a second unlocking command is sent to the second locking device 331 to unlock the manhole door 330, so that maintenance personnel can open the manhole door 330 to perform maintenance on the pressure vessel.

[0062] Optionally, please refer to Figure 4 The pressure vessel maintenance system also includes a management terminal 350; The first locking device 321 is used to upload first status information and second status information to the management terminal 350. The first status information is used to characterize the working status of the first locking device 321, and the second status information is used to characterize the working status of the pressure relief valve 320. The pressure detection device 340 is used to upload the air pressure value of the pressure vessel to the management terminal 350; The second locking device 331 is used to upload third status information to the management terminal 350, the third status information being used to characterize the working status of the manhole door 330.

[0063] It should be understood that since the pressure vessel maintenance method provided in this application embodiment is applied to the pressure vessel maintenance system, the pressure vessel maintenance system provided in this application embodiment has all the technical effects of the pressure vessel maintenance method.

[0064] Obviously, the embodiments described above are only some embodiments of this application, not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application. This application can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this application's specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the scope of patent protection of this application.

Claims

1. A method of inspecting a pressure vessel, characterized by, The pressure vessel maintenance method is applied to a pressure vessel maintenance system, which includes an unlocking device, a pressure relief valve, a manhole door, and a pressure detection device. The pressure relief valve includes a first locking device, and the manhole door includes a second locking device. The first locking device is used to control the pressure relief valve to be in a locked or unlocked state, and the second locking device is used to control the manhole door to be in a locked or unlocked state. The pressure vessel maintenance method includes: The unlocking device sends a first unlocking command to the first locking device to release the pressure relief valve from locking and open the pressure relief valve to release pressure from the pressure vessel. The unlocking device sends a detection command to the pressure detection device and receives a pressure relief completion command from the pressure detection device. The pressure relief completion command is used to indicate that the pressure value of the pressure vessel is lower than the preset safe pressure value. Upon receiving the depressurization completion command, the unlocking device sends a second unlocking command to the second locking device to unlock the manhole door, allowing maintenance personnel to open the manhole door for maintenance of the pressure vessel.

2. The method of claim 1, wherein, The unlocking device sends a first unlocking command to the first locking device to release the pressure relief valve from locking and to open the pressure relief valve to release pressure from the pressure vessel, including: The unlocking device acquires the identity identifier sent by the first locking device; The unlocking device verifies the identity identifier, and if the verification is successful, sends a first unlocking command to the first locking device so that the pressure relief valve is in the unlocked state. The pressure relief valve is opened according to the valve adjustment operation of the maintenance personnel to relieve pressure on the pressure vessel.

3. The method of claim 1, wherein, The pressure vessel maintenance system also includes a management terminal; The pressure vessel maintenance method also includes: The first locking device uploads first status information and second status information to the management terminal. The first status information is used to characterize the working status of the first locking device, and the second status information is used to characterize the working status of the pressure relief valve.

4. The method of claim 1, wherein, The unlocking device sends a detection command to the pressure detection device and receives a pressure relief completion command from the pressure detection device, including: The unlocking device acquires the identity identifier sent by the pressure detection device; The unlocking device verifies the identity identifier, and if the verification is successful, sends a detection command to the pressure detection device so that the pressure detection device can detect the air pressure value of the pressure vessel. When the pressure detection device detects that the pressure value of the pressure vessel is lower than the preset safe pressure value, it sends a pressure relief completion command to the unlocking device.

5. The method according to claim 1, characterized in that, The pressure vessel maintenance system also includes a management terminal; The pressure vessel maintenance method also includes: The pressure detection device uploads the air pressure value of the pressure vessel to the management terminal.

6. The method according to claim 1, characterized in that, Upon receiving the depressurization completion command, the unlocking device sends a second unlocking command to the second locking device to unlock the manhole door, allowing maintenance personnel to open the manhole door for maintenance of the pressure vessel. The method further includes: When maintenance personnel complete the maintenance of the pressure vessel, the unlocking device sends a locking command to the second locking device to lock the manhole door. The first locking device closes the pressure relief valve according to the valve locking operation performed by the maintenance personnel.

7. The method according to claim 1, characterized in that, Sending a second unlocking command to the second locking device to unlock the manhole door includes: The unlocking device acquires the identity identifier sent by the second locking device; The unlocking device verifies the identity identifier and, if the verification is successful, sends a second unlocking command to the second locking device.

8. The method according to claim 1, characterized in that, The pressure vessel maintenance system also includes a management terminal; The pressure vessel maintenance method also includes: The second locking device uploads third status information to the management terminal, which is used to characterize the working status of the manhole door.

9. A pressure vessel maintenance system, characterized in that, The pressure vessel maintenance system includes an unlocking device, a pressure relief valve, a manhole door, and a pressure detection device. The pressure relief valve includes a first locking device, and the manhole door includes a second locking device. The first locking device is used to control the pressure relief valve to be in a locked or unlocked state, and the second locking device is used to control the manhole door to be in a locked or unlocked state. The unlocking device is used to send a first unlocking command to the first locking device to release the pressure relief valve from locking and to open the pressure relief valve to release pressure from the pressure vessel. Send a detection command to the pressure detection device and receive a pressure relief completion command sent by the pressure detection device. The pressure relief completion command is used to indicate that the pressure value of the pressure vessel is lower than the preset safe pressure value. Upon receiving the pressure relief completion command, a second unlocking command is sent to the second locking device to unlock the manhole door, allowing maintenance personnel to open the manhole door for maintenance of the pressure vessel.

10. The pressure vessel maintenance system according to claim 9, characterized in that, The pressure vessel maintenance system also includes a management terminal; The first locking device is used to upload first status information and second status information to the management terminal. The first status information is used to characterize the working status of the first locking device, and the second status information is used to characterize the working status of the pressure relief valve. The pressure detection device is used to upload the air pressure value of the pressure vessel to the management terminal; The second locking device is used to upload third status information to the management terminal, the third status information being used to characterize the working status of the manhole door.

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