Oil pipeline pressure relief device

Abstract

The utility model provides an oil pipeline pressure relief device. The oil pipeline pressure relief device comprises a main control assembly, a pressure relief assembly and an emergency storage tank, the main control assembly is installed in a main pipeline, and the pressure relief assembly comprises a shell, a first pressure relief unit, a second pressure relief unit and a third pressure relief unit, and an inlet and an outlet of the pressure relief assembly are respectively connected with the main control assembly and the emergency storage tank through flanges. The oil pipeline pressure relief device solves the problem that after the pressure relief valve is damaged, other faults are prone to occurring in the maintenance period.

Description

Technical Field

[0001] This utility model relates to the field of oil pipelines, and specifically to an oil pipeline pressure relief device. Background Technology

[0002] Currently, long-distance oil and gas transportation commonly utilizes pipelines. During transportation, due to operational errors, equipment aging, or wear, localized pipeline pressure increases can occur. If not detected and addressed promptly, this can lead to pipeline damage and, in severe cases, safety accidents. Therefore, pressure relief systems are typically installed in pipelines. When pressure increases, specific valves are actively or passively opened to release the pressure into emergency storage tanks. However, pressure relief valves often fail due to impurities and wear. Furthermore, most oil pipelines are located in remote areas, and waiting for professional maintenance personnel to arrive on-site can be time-consuming, potentially leading to other malfunctions. Utility Model Content

[0003] To address the issue of other malfunctions easily arising during maintenance after damage to the pressure relief valve, this utility model provides a pressure relief device for oil pipelines that solves the aforementioned problem.

[0004] An oil pipeline pressure relief device includes a main control component, a pressure relief component, and an emergency storage tank. The main control component is installed in the main pipeline. The pressure relief component includes a shell and a first pressure relief unit, a second pressure relief unit, and a third pressure relief unit arranged in parallel therein. The inlet and outlet of the pressure relief component are respectively flanged to the main control component and the emergency storage tank.

[0005] In a preferred embodiment of the oil pipeline pressure relief device provided by this utility model, the main control component includes a tee pipe and a first manual valve. Two ports of the tee pipe are connected to the main pipeline, and one port is connected to the inlet of the pressure relief component via the first manual valve. The tee pipe is a T-shaped tee pipe, with two ports located on the same straight line connected to the main pipeline, and the other side opening connected to the first manual valve.

[0006] In a preferred embodiment of the oil pipeline pressure relief device provided by this utility model, the emergency storage tank includes a tank body and a second manual valve, and the tank body is connected to the outlet of the pressure relief component via the second manual valve.

[0007] In a preferred embodiment of the oil pipeline pressure relief device provided by this utility model, the pressure relief assembly includes a cabinet-type housing, with inlets and outlets respectively provided on opposite side walls of the housing, and the first pressure relief unit, the second pressure relief unit and the third pressure relief unit arranged sequentially from top to bottom inside, with the two ends of the three units connected in parallel and respectively connected to the inlet and outlet.

[0008] The first pressure relief unit includes a third manual valve, a first electric valve, and a first pressure relief valve connected in series; the second pressure relief unit includes a fourth manual valve and a second pressure relief valve connected in series; and the third pressure relief unit includes a second electric valve and a third pressure relief valve connected in series.

[0009] In a preferred embodiment of the oil pipeline pressure relief device provided by this utility model, the pressure relief assembly further includes two pressure measuring units and a control unit. The two pressure measuring units are respectively located at the inlet and outlet, and the control unit is located inside the housing and is simultaneously connected to the two pressure measuring units, the first electric valve, and the second electric valve.

[0010] Compared with existing technologies, the oil pipeline pressure relief device provided by this utility model has the following beneficial effects:

[0011] 1. The pressure relief component in this utility model adopts an integrated structure, which facilitates overall disassembly and installation, enabling rapid maintenance and replacement, and significantly shortening the on-site maintenance time.

[0012] 2. The pressure relief assembly in this utility model is equipped with two sets of manual pressure relief units, one for use and one for backup. In case of failure, the valve can be switched in time to achieve backup without waiting for professional maintenance personnel to arrive, which significantly shortens the failure time and avoids other failures during the waiting period for maintenance.

[0013] 3. The pressure relief component in this utility model is also equipped with an automatic pressure relief unit, which can be automatically switched by the system in extreme cases to avoid safety accidents. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the pressure relief device for an oil pipeline;

[0015] Figure 2 This is a schematic diagram of the pressure relief component in an oil pipeline pressure relief device.

[0016] The following components are labeled in the diagram: Main control component 1, three-way pipe 11, first manual valve 12, pressure relief component 2, housing 21, first pressure relief unit 22, third manual valve 221, first electric valve 222, first pressure relief valve 223, second pressure relief unit 23, fourth manual valve 231, second pressure relief valve 232, third pressure relief unit 24, second electric valve 241, third pressure relief valve 242, pressure measuring unit 25, control unit 26, emergency storage tank 3, tank body 31, second manual valve 32. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Please also refer to Figure 1 and Figure 2 These are schematic diagrams of the oil pipeline pressure relief device and its pressure relief components provided by this utility model.

[0019] The oil pipeline pressure relief device includes a main control component 1, a pressure relief component 2, and an emergency storage tank 3.

[0020] The main control component 1 includes a T-shaped tee pipe 11 and a first manual valve 12. The tee pipe 11 is a T-shaped tee pipe, with two ports on the same straight line connected to the main pipeline, and the other side opening connected to the first manual valve 12. The emergency storage tank 3 includes a tank body 31 and a second manual valve 32, with the inlet of the tank body 31 connected to the second manual valve 32.

[0021] The pressure relief assembly 2 includes a housing 21, a first pressure relief unit 22, a second pressure relief unit 23, a third pressure relief unit 24, a pressure measuring unit 25, and a control unit 26.

[0022] The housing 21 is a cabinet-type housing with a cabinet door on the front (not shown in the attached figure). Inside, from top to bottom, there are a control unit 26, a first pressure relief unit 22, a second pressure relief unit 23, and a third pressure relief unit 24.

[0023] The first pressure relief unit 22 includes a third manual valve 221, a first electric valve 222 and a first pressure relief valve 223 connected in series; the second pressure relief unit 23 includes a fourth manual valve 231 and a second pressure relief valve 232 connected in series; the third pressure relief unit 24 includes a second electric valve 241 and a third pressure relief valve 242 connected in series.

[0024] The left-end pipes of the third manual valve 221, the fourth manual valve 231, and the second electric valve 241 are combined and connected to the inlet located on the left side wall of the housing 21; the right-end pipes of the first pressure relief valve 223, the second pressure relief valve 232, and the third pressure relief valve 242 are combined and connected to the outlet located on the right side wall of the housing 21. The inlet and outlet are respectively connected to the first manual valve 12 and the second manual valve 32 by flanges.

[0025] A pressure measuring unit 25 is installed on each of the inlet and outlet pipelines. Each pressure measuring unit 25 includes two pressure transmitters, one for use and one for backup. The control unit 26 is connected to the two pressure measuring units 25, the first electric valve 222, and the second electric valve 241 via a control circuit.

[0026] In operation, the first manual valve 12, the second manual valve 32, the third manual valve 221, and the first electric valve 222 are normally open, while the fourth manual valve 231 and the second electric valve 241 are normally closed. The oil pressure in the main pipeline is transmitted to the first pressure relief valve 223 via the first manual valve 12, the third manual valve 221, and the second electric valve 222. When the pressure is too high, the first pressure relief valve 223 automatically opens, and the pressure is released to the tank 31 via the second manual valve 32.

[0027] When the first pressure relief valve 223 malfunctions, the control unit 26 will issue an alarm if it reads abnormal data from one or both pressure measuring units 25. Patrol personnel can promptly detect the alarm and close the third manual valve 221 and open the fourth manual valve 231.

[0028] At this time, the oil pressure in the main pipeline is transmitted to the second pressure relief valve 232 via the first manual valve 12 and the fourth manual valve 231. When the pressure is too high, the second pressure relief valve 232 is automatically opened, and the pressure is released to the tank 31 via the second manual valve 32.

[0029] In extreme cases, when the first pressure relief valve 223 fails, the control unit 26 reads abnormal data from one or two pressure measuring units 25. Based on the abnormal data, it is determined that there is not enough time to wait for the third manual valve 221 to be closed and the fourth manual valve 231 to be opened. In this case, the control unit 26 controls the first electric valve 222 to be closed and the second electric valve 241 to be opened.

[0030] At this time, the oil pressure in the main pipeline is transmitted to the third pressure relief valve 242 via the first manual valve 12 and the second electric valve 241. When the pressure is too high, the third pressure relief valve 242 is automatically opened, and the pressure is released to the tank 31 via the second manual valve 32.

[0031] After the maintenance personnel arrive, they will close the first manual valve 12 and the second manual valve 32, disassemble and replace the entire pressure relief assembly 2, and then transport the removed pressure relief assembly 2 back for further maintenance.

[0032] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A pressure relief device for an oil pipeline, characterized in that: It includes a main control component, a pressure relief component, and an emergency storage tank. The main control component is installed in the main pipeline. The pressure relief component includes a shell and a first pressure relief unit, a second pressure relief unit, and a third pressure relief unit arranged in parallel therein. The inlet and outlet of the pressure relief component are respectively flanged to the main control component and the emergency storage tank.

2. The oil pipeline pressure relief device according to claim 1, characterized by: The main control component includes a three-way pipe and a first manual valve. Two ports of the three-way pipe are connected to the main pipeline, and one port is connected to the inlet of the pressure relief component via the first manual valve.

3. The oil pipeline pressure relief device of claim 2, wherein: The tee is a T-shaped tee, with two ports on the same straight line connected to the main pipe, and the other side opening connected to the first manual valve.

4. The oil pipeline pressure relief device of claim 3, wherein: The emergency storage tank includes a tank body and a second manual valve, the tank body being connected to the outlet of the pressure relief assembly via the second manual valve.

5. A pressure relief device for a pipeline as claimed in any one of claims 1 to 4, wherein: The pressure relief assembly includes a cabinet-type housing, with inlets and outlets on opposite side walls. Inside, from top to bottom, are arranged the first pressure relief unit, the second pressure relief unit, and the third pressure relief unit, with their ends connected in parallel and connected to the inlets and outlets respectively.

6. The oil pipeline pressure relief device of claim 5, wherein: The first pressure relief unit includes a third manual valve, a first electric valve, and a first pressure relief valve connected in series; the second pressure relief unit includes a fourth manual valve and a second pressure relief valve connected in series; and the third pressure relief unit includes a second electric valve and a third pressure relief valve connected in series.

7. The oil pipeline pressure relief device of claim 6, wherein: The pressure relief assembly also includes two pressure measuring units and a control unit. The two pressure measuring units are respectively located at the inlet and outlet, and the control unit is located inside the housing and is simultaneously connected to the two pressure measuring units, the first electric valve, and the second electric valve.

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