A large oil and gas field station fire pump pressure relief backflow detection system and detection method

Abstract

The present application relates to the technical field of large oil and gas field station fire fighting system, and specifically relates to a large oil and gas field station fire fighting pump pressure relief backflow detection system and a detection method, which comprises a working pipeline and a standby pipeline, the working pipeline and the standby pipeline are both provided with a fire fighting pump, the output ends of the working pipeline and the standby pipeline are both connected with a fire fighting water outlet pipeline, the fire fighting water outlet pipelines of the two are communicated through a communication pipeline, the communication pipeline is parallelly connected with a pressure relief pipeline 3 and a backflow detection pipeline, the output ends of the pressure relief pipeline and the backflow detection pipeline are both merged into the same pipeline and are communicated with a fire fighting water tank or a fire fighting pool; the present application adopts an integrated installation process, solves the problem of system overpressure in the operation process of the automatic control fire fighting system of the large oil and gas station, and meets the requirements of flow and pressure detection, fire hydrant testing and the like in the daily maintenance of the fire fighting system.

Description

Technical Field

[0001] This invention relates to the field of fire protection systems for large oil and gas field stations, specifically to a system and method for detecting pressure relief and backflow of fire pumps in large oil and gas field stations. Background Technology

[0002] Large oil and gas stations typically have large-scale, high-flow-rate, and high-pressure fire protection systems that are automatically controlled. Due to the diverse types of facilities in large stations, the fire water demand varies depending on the location of the fire, resulting in significant differences between the maximum and minimum fire flow rates. Fire pump selection must comprehensively consider factors such as maintenance, operation, and control to minimize the number of pumps. If the fire pumps are selected based solely on the maximum fire water demand, the operation of high-flow-rate pumps can cause the fire protection system pressure to exceed the normal operating pressure when the fire water demand is low.

[0003] After the fire protection system is built, it needs to be tested and accepted. The fire protection system of large oil and gas stations has a large flow rate. The previous practice of using mobile detection facilities for reserved pipeline detection locations cannot meet the acceptance test requirements of high flow rate fire protection. Therefore, it is necessary to install fixed flow detection facilities.

[0004] Fire pumps require regular routine maintenance and operation; the fire protection system needs to use fire hydrants to test the flow rate and pressure of the fire pumps, and the fire pressure needs to be observed through actual use of fire hydrants in order to determine whether the water supply pumps of the fire protection system meet the requirements.

[0005] To achieve the aforementioned functions, a method is needed that can operate automatically and adapt to large variations in pressure and flow to meet the operational and testing requirements of automatic control and fire protection systems in large oil and gas field stations. Summary of the Invention

[0006] This invention overcomes the shortcomings of the prior art and provides a pressure relief and backflow detection system and method for fire pumps in large oil and gas field stations. In particular, the pressure relief and backflow detection system and method of this invention solves the problem of system overpressure during the operation of the automatic control fire protection system in large oil and gas stations, and meets the requirements of flow and pressure detection and fire hydrant testing for daily maintenance of the fire protection system.

[0007] The technical problem solved by this invention can be achieved by the following technical solutions:

[0008] A large oil and gas field station fire pump pressure relief and backflow detection system includes a working pipeline and a standby pipeline. Each working pipeline and the standby pipeline is equipped with a fire pump. The output ends of both the working pipeline and the standby pipeline are connected to fire water outlet pipelines. The fire water outlet pipelines of the two pipelines are connected to each other through a connecting pipeline. A pressure relief pipeline and a backflow detection pipeline are connected in parallel on the connecting pipeline. The output ends of the pressure relief pipeline and the backflow detection pipeline converge into the same pipeline and are connected to a fire water tank or fire pool.

[0009] Furthermore, the pressure relief pipeline includes a pressure relief valve and a first electrically controlled valve. Two first electrically controlled valves are provided, which are respectively installed on the inlet pipeline and the outlet pipeline of the pressure relief valve.

[0010] Furthermore, the backflow detection pipeline includes a flow meter and a second electric control valve. There are two second electric control valves, which are respectively installed on the pipelines at the inlet and outlet of the flow meter. A fire hydrant is also installed on the inlet pipeline of the flow meter.

[0011] Furthermore, a third electric control valve is installed at the connection point between the connecting pipeline and the working pipeline, and at the connection point between the connecting pipeline and the backup pipeline.

[0012] Furthermore, a fourth electric control valve is connected to the fire water outlet pipeline at the output end of both the working pipeline and the standby pipeline.

[0013] Furthermore, the working pipeline is an electric fire pump control pipeline, on which a fire pump is installed.

[0014] Furthermore, the backup pipeline is a diesel fire pump control pipeline, on which a fire diesel engine pump is installed.

[0015] Furthermore, the pressure relief valve is a digital display type pressure relief valve.

[0016] Furthermore, the flow meter is a target-type flow meter.

[0017] A detection method for a large-scale oil and gas field station fire pump pressure relief and backflow detection system, comprising the large-scale oil and gas field station fire pump pressure relief and backflow detection system as described above, including the following method:

[0018] Based on the safe pressure values ​​of the fire pumps on the working and standby pipelines, preset the pressure relief pressure on the pressure relief pipeline;

[0019] When a large oil and gas field station fire pump is performing normal firefighting operations, the pressure relief pipeline opens when the pressure exceeds the preset pressure to release pressure.

[0020] When large oil and gas field station fire pumps need to be tested regularly, run backflow test pumps, or be overhauled, the pressure relief pipeline is closed and the backflow detection pipeline is opened. The flow rate of the fire pump is then checked through the backflow detection pipeline to see if it meets the design parameters of the fire pump.

[0021] If the flow rate of the fire pump being tested does not meet the design parameters, it indicates that the fire pump is malfunctioning and needs to be repaired or replaced.

[0022] The beneficial effects of this invention are:

[0023] Compared with existing technologies, this invention achieves multiple functions of fire pump, including pressure relief, backflow detection, and monitoring, through pressure relief pipelines and backflow detection pipelines, ensuring the safe and reliable automatic operation of the fire protection system. The centralized arrangement of valves and pipelines for various functions not only meets functional requirements but also creates a neat and aesthetically pleasing appearance, facilitating operation and management.

[0024] Using a digital display pressure relief valve allows the valve's operating status to be uploaded to the central control room, facilitating monitoring and management.

[0025] Using a target-type flow meter, pipelines do not need to be removed during routine maintenance, the installation size is small, and maintenance is convenient.

[0026] Fire hydrants are installed on the backflow detection pipeline. The fire hydrants are pressure-reducing and pressure-stabilizing fire hydrants. The fire pump outlet pressure is high, and the pressure-reducing and pressure-stabilizing fire hydrants can be adjusted as needed for easy testing. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0028] Figure 1 This is a schematic diagram of the overall structure of the large-scale oil and gas field station fire pump pressure relief and backflow detection system of the present invention.

[0029] In the diagram: 1-Working pipeline, 2-Standby pipeline, 3-Pressure relief pipeline, 4-Backflow detection pipeline, 5-Fire water outlet pipeline, 6-Fire electric pump, 7-Fire diesel engine pump, 8-Pressure relief valve, 9-Fire hydrant, 10-Flow meter, 11-First electric control valve, 12-Second electric control valve, 13-Third electric control valve, 14-Fourth electric control valve, 15-Connecting pipeline. Detailed Implementation

[0030] The technical solution of a large oil and gas field station fire pump pressure relief and backflow detection system and detection method provided by the present invention will be described in detail below through several specific embodiments.

[0031] Reference Figure 1 A large-scale oil and gas field station fire pump pressure relief and backflow detection system includes a working pipeline 1 and a standby pipeline 2. Each of the working pipeline 1 and the standby pipeline 2 is equipped with a fire pump. The output ends of both the working pipeline 1 and the standby pipeline 2 are connected to a fire water outlet pipeline 5. The fire water outlet pipelines 5 of the two pipelines are connected by a connecting pipeline 15. A pressure relief pipeline 3 and a backflow detection pipeline 4 are connected in parallel on the connecting pipeline 15. The output ends of the pressure relief pipeline 3 and the backflow detection pipeline 4 converge into the same pipeline and are connected to a fire water tank or fire pool.

[0032] The aforementioned working pipeline 1 is the normal operating pipeline of the large-scale oil and gas field station fire pump pressure relief and backflow detection system. When this pipeline malfunctions, the backup pipeline 2 will be immediately activated for firefighting operations, avoiding disruption to normal firefighting activities. This large-scale oil and gas field station fire pump pressure relief and backflow detection system uses two pipelines, pressure relief pipeline 3 and backflow detection pipeline 4, to separate pressure relief and backflow detection. This simplifies operation and is safer and more reliable than existing systems that place these on the same pipeline. Furthermore, pressure gauges are installed on both the working pipeline 1 and the backup pipeline 2 for direct pressure monitoring. Therefore, this invention's large-scale oil and gas field station fire pump pressure relief and backflow detection system meets the flow and pressure detection requirements for daily maintenance of the fire protection system. This invention employs an integrated installation process, solving the problem of system overpressure during the operation of the automatic control fire protection system in large-scale oil and gas stations, and meeting the requirements for flow and pressure detection, fire hydrant testing, and other aspects of daily maintenance of the fire protection system.

[0033] Furthermore, the aforementioned working pipeline 1 is an electric fire pump control pipeline, on which a fire pump 6 is installed. During normal operation, the electric fire pump control pipeline is in standby mode; in the event of an emergency, it will be immediately activated for firefighting operations.

[0034] Furthermore, the backup pipeline 2 is a diesel fire pump control pipeline, on which a fire diesel engine pump 7 is installed.

[0035] Furthermore, the pressure relief pipeline 3 includes a pressure relief valve 8 and two first electric control valves 11, respectively installed on the inlet and outlet pipelines of the pressure relief valve 8. Both first electric control valves 11 are normally open. The pressure relief valve 8 is a digital display type, which automatically releases pressure to a set value when the fire protection pipeline is overpressurized, ensuring the normal operation of the fire protection system. The digital display type pressure relief valve can upload its operating status to the central control room for easy monitoring and management. The pressure relief value and closing value of the pressure relief valve need to be adjusted online. The first electric control valve 11 is used for maintenance of the pressure relief valve 8. Due to its large pipe diameter, the first electric control valve 11 is selected as an electric ball valve or an electric gate valve, and is normally in the open state. The diameter of the pressure relief pipe can be determined based on the maximum backflow rate.

[0036] Pressure relief line 3 is a key and necessary facility to ensure the normal operation of the fire protection system. In large fire protection systems, the fire pump has a large flow rate. When the fire water consumption of the fire protection system is small, it will cause the system to be over-pressurized. Pressure relief valve 8 can be used to release the excess pressure and maintain the safe operation of the fire protection system.

[0037] Furthermore, the backflow detection pipeline 4 includes a flow meter 10 and a second electric control valve 12. Two second electric control valves 12 are provided, one at the inlet and one at the outlet of the flow meter 10. A fire hydrant 9 is also installed on the inlet pipeline of the flow meter 10. The flow meter 10 is a target-type flow meter, which can be installed simply by opening a DN50 connecting pipe in the fire protection pipeline. Straight pipe sections must be met before and after the flow meter. The pipeline does not need to be removed during routine maintenance, resulting in a small installation size and convenient maintenance. The diameter of the backflow detection pipeline 4 is the same as that of the fire pump outlet pipeline. The fire hydrant 9 is a pressure-reducing and stabilizing fire hydrant. Given the high outlet pressure of the fire pump, the pressure of the pressure-reducing and stabilizing fire hydrant can be adjusted as needed for testing. The second electric control valve 12 is used for maintenance of the fire hydrant 9 and the flow meter 10. Due to the large pipe diameter, the second electric control valve 12 is selected as an electric ball valve or an electric gate valve, and is normally in the open state.

[0038] Furthermore, a third electric control valve 13 is respectively installed at the connection point between the connecting pipeline 15 and the working pipeline 1, and at the connection point between the connecting pipeline 15 and the standby pipeline 2. This valve is used to control the liquid to enter the pressure relief pipeline 3 and the backflow detection pipeline 4 when the working pipeline 1 or the standby pipeline 2 is operating.

[0039] Furthermore, a fourth electric control valve 14 is connected to the fire-fighting water outlet pipeline 5 at the output end of both the working pipeline 1 and the standby pipeline 2. This valve is used to control the output of liquid for fire-fighting operations.

[0040] The third electric control valve 13 and the fourth electric control valve 14 on the fire pump outlet pipeline 5 and the connecting pipeline 15 can switch the fire pump's normal operation and fire pump test status by switching the third electric control valve 13 and the fourth electric control valve 14.

[0041] A detection method for a large oil and gas field station fire pump pressure relief and backflow detection system includes the following steps:

[0042] Based on the safe pressure values ​​of the fire pumps on working pipeline 1 and standby pipeline 2, preset the pressure relief pressure on pressure relief pipeline 3;

[0043] When the fire pumps at large oil and gas field stations are carrying out normal fire-fighting operations, the pressure relief pipeline 3 opens when the pressure exceeds the preset pressure, automatically opening the pressure relief valve 8 to release pressure. When the pressure drops to the preset value, it closes to ensure that the fire-fighting pipeline network operates normally at the required pressure.

[0044] The pressure relief valve 8 is a digital display type, which can remotely observe the pressure relief value and closing value, and monitor whether the pressure relief valve is operating normally at any time. It can also remotely monitor whether the operating pressure of the fire protection system meets the operating requirements. This control method can meet the fire protection system of large stations with large changes in fire water volume and large pressure fluctuations. It can realize the reliable operation of the fire protection network within the design pressure range, improve the safety of the fire protection system, and is a necessary safety measure for the fire protection system.

[0045] When a large oil and gas field station fire pump needs to be tested regularly for backflow or for maintenance, the first electric control valve 11 on the pressure relief pipeline can be closed, and the second electric control valve 12 on the backflow detection pipeline can be opened. The flow meter 10 installed on the backflow detection pipeline 4 can be used to detect whether the flow rate of the fire pump meets the design parameters of the fire pump.

[0046] The present invention also includes a fire hydrant 9, which can be used to test whether the fire hydrant meets the usage requirements in the field.

[0047] If the flow rate of the fire pump being tested does not meet the design parameters, it indicates that the fire pump is malfunctioning and needs to be repaired or replaced.

[0048] The flow meter installed on the return flow detection pipeline 4 is a target flow meter. For large-diameter fire return pipelines, it can reduce the installation size and transmit fire detection data remotely to meet the accuracy requirements.

[0049] The return flow detection line 4 and the pressure relief line are two separate lines. In addition to meeting the different functional requirements of the fire pump, the flow rate can be manually controlled and the pressure adjusted by the flow meter on the return flow line when a fire occurs during the maintenance of the pressure relief line, so as to ensure the normal operation of the fire protection system.

[0050] Working principle of the invention:

[0051] Pressure relief:

[0052] During normal operation, pressure relief valve 8 is adjusted online to set the pressure relief value and closing pressure. The first electric control valve 11 is in the open position. If the system is overpressurized during operation, the digital display pressure relief valve can automatically relieve pressure and close automatically when the closing value is reached. At the same time, the operating status can be uploaded to the central control room to ensure the safe operation of the fire protection system. When using pressure relief pipeline 3, the third electric control valve 13 and the fourth electric control valve 14 of the fire pump outlet pipeline must be opened, and the second electric control valve 12 of the backflow test pipeline must be closed.

[0053] Traffic detection:

[0054] A flow meter 10 is installed on the backflow test pipeline to test the fire pump flow rate during acceptance testing and fire protection inspections. During the flow test, the first electric control valve 11 on the pressure relief pipeline and the fourth electric control valve 14 on the fire pump outlet pipeline must be closed. The second electric control valve 12 and the third electric control valve 13 on the fire pump backflow test pipeline must be opened, and the pump should be started directly for the flow test. If the tested flow rate of the fire pump does not meet the original design parameters, it indicates a malfunction, requiring repair or replacement. Pressure gauges are also installed at the inlet and outlet of the fire pump to observe the pressure values ​​during backflow and determine whether the pressure values ​​meet the original design parameters.

[0055] Fire hydrant inspection:

[0056] Fire hydrant 9 is installed on the return flow test pipeline. Opening fire hydrant 9 and connecting a water hose allows direct observation of its operation. When using fire hydrant 9, the first electric control valve 11 on the pressure relief pipeline must be closed, the fourth electric control valve 14 on the fire pump outlet pipeline must be closed, and the second electric control valve 12 and the third electric control valve 13 on the fire pump return flow test pipeline must be opened. The pump can then be started directly for testing. Fire hydrant 9 is a pressure-reducing and pressure-stabilizing fire hydrant; the outlet pressure can be adjusted as required to meet the on-site pressure testing requirements of the high-pressure fire protection system. Observe whether the solid water column from the fire hydrant meets the requirements.

[0057] Routine fire pump maintenance: backflow prevention

[0058] When performing routine fire pump maintenance and backflow testing, the first electric control valve 11 on the pressure relief pipeline must be closed, the fourth electric control valve 14 on the fire pump outlet pipeline must be closed, and the second electric control valve 12 and the third electric control valve 13 on the fire pump backflow test pipeline must be opened. The pump can then be started directly for backflow testing. During backflow testing, water from the fire outlet pipeline 5 enters the fire water tank or fire pool.

[0059] The test checks whether the fire pump meets the design parameters. If the flow rate and pressure of the tested fire pump do not meet the design parameter requirements, it indicates that the fire pump is faulty and needs to be repaired or replaced.

[0060] In actual use, the diameter of the return flow detection pipeline 4 is the same as that of the main fire water supply line 5, which can accurately detect the design parameters of the fire pump. For example, if the diameter of pipeline 5 is DN400, then the diameter of the return flow pipeline 4 is also DN400.

[0061] The diameter of pressure relief pipeline 3 can be 1-2 sizes smaller than that of the main fire water supply line 5, or it can be determined based on the maximum pressure relief flow rate under various fire protection system conditions. For example, if the diameter of pipeline 5 is DN400, then the diameter of pressure relief pipeline 3 can be DN300. The valve diameter of all valves is the same as that of the pipelines.

[0062] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention, and all such changes are within the protection scope of the technology.

[0063] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0064] The technical solutions of the various embodiments can be combined with each other, but must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

Claims

1. A large-scale oil and gas field station fire pump pressure relief and backflow detection system, characterized in that: It includes a working pipeline (1) and a standby pipeline (2), each of which is equipped with a fire pump. The output ends of the working pipeline (1) and the standby pipeline (2) are connected to a fire water outlet pipeline (5). The fire water outlet pipelines (5) of the two are connected by a connecting pipeline (15). A pressure relief pipeline (3) and a backflow detection pipeline (4) are connected in parallel on the connecting pipeline (15). The output ends of the pressure relief pipeline (3) and the backflow detection pipeline (4) are all connected to the same pipeline and are connected to a fire water tank or fire pool. The pressure relief pipeline (3) includes a pressure relief valve (8) and a first electric control valve (11). There are two first electric control valves (11), which are respectively installed on the inlet pipeline and the outlet pipeline of the pressure relief valve (8). The backflow detection pipeline (4) includes a flow meter (10) and a second electric control valve (12). There are two second electric control valves (12), which are respectively installed on the pipeline at the inlet and outlet of the flow meter (10). A fire hydrant (9) is also installed on the inlet pipeline of the flow meter (10). The flow meter (10) is a target flow meter; the fire hydrant (9) is a pressure-reducing and pressure-stabilizing fire hydrant. The fire pump outlet pressure is large, and the pressure-reducing and pressure-stabilizing fire hydrant can be adjusted according to the needs of testing; the second electric control valve (12) is a valve for maintenance of the fire hydrant (9) and the flow meter (10); the second electric control valve (12) is selected as an electric ball valve, which is normally in the open state.

2. The large-scale oil and gas field station fire pump pressure relief and backflow detection system according to claim 1, characterized in that: A third electric control valve (13) is provided at the connection point between the connecting pipeline (15) and the working pipeline (1) and at the connection point between the connecting pipeline (15) and the standby pipeline (2).

3. The large-scale oil and gas field station fire pump pressure relief and backflow detection system according to claim 1, characterized in that: The fire water outlet pipeline (5) at the output end of the working pipeline (1) and the standby pipeline (2) are each connected to a fourth electric control valve (14).

4. The large-scale oil and gas field station fire pump pressure relief and backflow detection system according to claim 1, characterized in that: The working pipeline (1) is an electric fire pump control pipeline, and a fire pump (6) is installed on the pipeline.

5. The large-scale oil and gas field station fire pump pressure relief and backflow detection system according to claim 1, characterized in that: The backup pipeline (2) is a diesel fire pump control pipeline, and a fire diesel engine pump (7) is installed on the pipeline.

6. The large-scale oil and gas field station fire pump pressure relief and backflow detection system according to claim 1, characterized in that: The pressure relief valve (8) is a digital display type pressure relief valve.

7. A detection method for a large oil and gas field station fire pump pressure relief and backflow detection system, comprising the large oil and gas field station fire pump pressure relief and backflow detection system as described in any one of claims 1-6, characterized in that: Including the following methods: Based on the safe pressure values ​​of the fire pumps on the working pipeline (1) and the standby pipeline (2), the pressure relief pressure on the pressure relief pipeline (3) is preset; When the fire pumps at large oil and gas field stations are performing normal fire-fighting operations, the pressure on the pressure relief pipeline (3) will be opened to relieve pressure when the pressure is greater than the preset pressure. When a large oil and gas field station fire pump needs to be tested regularly for backflow testing or maintenance, the pressure relief pipeline (3) is closed and the backflow detection pipeline (4) is opened. The flow rate of the fire pump is tested through the backflow detection pipeline (4) to see if it meets the design parameters of the fire pump. If the flow rate of the fire pump being tested does not meet the design parameters, it indicates that the fire pump is malfunctioning and needs to be repaired or replaced.

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