High and low pressure automatic switching device for pressure pipeline monitoring system

Abstract

The utility model relates to a high-low pressure automatic switching device for a pressure pipeline monitoring system, which comprises a pressure pipeline, and two ends of the pressure pipeline are respectively and correspondingly connected with a first actuator and a second actuator; a pressure sensor is installed on an inlet section of the main measuring pipeline, and the pressure pipeline is located behind the pressure sensor and communicated with the main measuring pipeline through a first actuator. The pressure pipeline monitoring system is installed on the measuring main pipeline, an outlet of the pressure pipeline monitoring system is connected with a measuring outflow pipe, the measuring outflow pipe is connected with the pressure pipeline through a second actuator, and the pressure pipeline monitoring system is electrically connected with the pressure sensor, the first actuator and the second actuator. The device can realize millisecond-level response in a pressure sudden change scene, and effectively restrain overpressure and low pressure risks.

Description

Technical Field

[0001] This utility model relates to the field of pressure pipeline monitoring technology, and more specifically to an automatic high-low pressure switching device for a pressure pipeline monitoring system. Background Technology

[0002] Pressure pipelines are widely used in industries such as petroleum, natural gas, chemical, and power to transport various fluids (such as liquids and gases). During operation, the pressure within the pipeline may fluctuate due to changes in fluid properties, flow rate, or external factors (such as temperature or equipment malfunction). Both excessively high and low pressures can harm the pipeline system: high pressure risks may lead to pipeline rupture, equipment damage, or even safety accidents; low pressure risks may reduce fluid transport efficiency and affect production processes. Therefore, providing a device that can monitor pressure in real time and automatically switch between high and low pressure pipelines to ensure the safety and stability of the pipeline system is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0003] Therefore, the purpose of this utility model is to propose an automatic high-low pressure switching device for a pressure pipeline monitoring system to ensure the safety of the pipeline system and measuring equipment.

[0004] The technical solution provided by this utility model is an automatic high-low pressure switching device for a pressure pipeline monitoring system, comprising:

[0005] The pressure pipeline has a first actuator and a second actuator connected to its two ends respectively;

[0006] A pressure sensor is installed at the inlet section of the measuring main pipeline, and the pressure pipeline is located behind the pressure sensor and is connected to the measuring main pipeline through the first actuator;

[0007] The switching control system and the pressure pipeline monitoring system have their inlet connected to the main measuring pipeline and their outlet connected to a measuring outflow pipe. The measuring outflow pipe is connected to the pressure pipeline via a second actuator. The pressure pipeline monitoring system is electrically connected to the pressure sensor, the first actuator, and the second actuator. Based on the pressure information received from the pressure sensor monitoring the inlet section of the main measuring pipeline, the pressure pipeline monitoring system controls the first actuator and the second actuator to operate simultaneously. This is to respectively cut off the main measuring pipeline and the measuring outflow pipe and open the pressure pipeline to achieve bypass pressure relief, or to respectively connect the main measuring pipeline and the measuring outflow pipe and cut off the pressure pipeline to achieve normal fluid transport.

[0008] According to the automatic switching device of this utility model, both the first actuator and the second actuator are explosion-proof electric three-way ball valves.

[0009] According to the automatic switching device of this utility model, the first actuator has ports a, b, and c, wherein ports a and b are both connected to the main measuring pipeline, and port c is connected to one end of the pressure pipeline; the second actuator has ports e, f, and d, wherein ports e and d are both connected to the measuring outflow pipe, and port f is connected to the other end of the pressure pipeline; the measurement state of the pressure pipeline monitoring system is: ports a and b of the first actuator are connected, and ports e and d of the second actuator are connected; the bypass state of the pressure pipeline monitoring system is: ports a and c of the first actuator are connected, and ports f and d of the second actuator are connected, in which state the pressure pipeline is bypassed and depressurized.

[0010] According to the automatic switching device of this utility model, the pressure pipeline is a high-pressure hose, and its pressure-bearing range is greater than that of the measuring main pipeline.

[0011] According to the automatic switching device of this utility model, each pipeline connection node between the main measuring pipeline and the first actuator, each pipeline connection node between the pressure pipeline monitoring system and the main measuring pipeline and the measuring outlet pipe, the pipeline connection node between the measuring outlet pipe and the second actuator, and the pipeline connection nodes between both ends of the pressure pipeline and the first actuator and the second actuator are all connected by sealing flanges.

[0012] As can be seen from the above technical solution, compared with the prior art, this utility model has the following beneficial effects:

[0013] 1. This invention achieves millisecond-level response (measured response time ≤ 0.5s) in the event of sudden pressure changes through the coordinated control of a pressure sensor and dual actuators, effectively suppressing the risks of overpressure / underpressure. Compared to traditional mechanical safety valves (response time ≥ 3s), the efficiency of handling abnormal pressure is improved by 600%, and the system safety is significantly enhanced.

[0014] 2. This utility model uses an explosion-proof electric three-way ball valve connected to a sealing flange. Under operating conditions of -40℃ to 150℃, the leakage rate is ≤0.01% (Class VI sealing standard), eliminating environmental and safety risks caused by media leakage. Compared to ordinary ball valves (leakage rate ≥0.5%), the sealing performance is improved.

[0015] 3. This utility model, through the bypass design of the pressure pipeline, automatically switches to a high-pressure hose for pressure relief when the pressure exceeds the limit, with a pressure relief flow rate of up to 200m³. 3 Traditional bypass valves require manual intervention for switching, while this device achieves fully automated pressure relief, avoiding delays caused by manual operation.

[0016] 4. This utility model, through standardized flange connection and split actuator design, reduces single maintenance time to 1 hour (compared to 4-6 hours for traditional systems), and supports rapid replacement of faulty components. Total lifecycle maintenance costs are reduced by 40%. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 This utility model provides a structural schematic diagram of an automatic high-low pressure switching device for a pressure pipeline monitoring system. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0020] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Pressure pipelines, as core transportation carriers in the oil, natural gas, and chemical industries, are directly related to industrial production efficiency and personnel safety through their safe operation. Traditional pressure management technologies mainly rely on the following methods:

[0022] Manual switching: Operators manually switch between high and low pressure pipelines based on pressure gauge readings. This method is inefficient and prone to accidents due to human error.

[0023] Mechanical pressure regulating valves: They regulate pressure through mechanical devices, but have slow response speed, low accuracy, and cannot achieve intelligent control.

[0024] Fixed pressure threshold alarm: An alarm is triggered when the pressure exceeds or falls below a set threshold, but the pipeline cannot be switched automatically and manual intervention is still required.

[0025] These traditional methods suffer from the following problems: they rely on manual operation, resulting in low efficiency and a high risk of error; they lack real-time monitoring and automated control capabilities; they cannot adapt to complex operating conditions and fluctuating production demands; high-pressure risks may lead to pipe ruptures, equipment damage, or even safety accidents; and low-pressure risks may reduce fluid transport efficiency, impacting production processes.

[0026] In view of this, the present invention provides an automatic high-low pressure switching device for a pressure pipeline monitoring system, see appendix. Figure 1 It includes a pressure pipeline 600, a first actuator 400, a second actuator 500, a measuring main pipeline 200, a pressure sensor 201, a measuring outlet pipe 300, etc., for the pressure pipeline monitoring system 100;

[0027] The pressure pipeline 600 is connected to a first actuator 400 and a second actuator 500 at its two ends, respectively. A measuring main pipeline 200 has a pressure sensor 201 installed at its inlet. The pressure pipeline 600 is located downstream of the pressure sensor 201 and is connected to the measuring main pipeline 200 via the first actuator 400. A pressure pipeline monitoring system 100 has its inlet connected to the measuring main pipeline 200, and its outlet connected to a measuring outlet pipe 300. The measuring outlet pipe 300 is connected to the pressure pipeline 600 via the second actuator 500. The monitoring system 100 is electrically connected to the pressure sensor 201, the first actuator 400, and the second actuator 500. The pressure pipeline monitoring system 100 receives the pressure information of the inlet section of the measuring main pipeline 200 monitored by the pressure sensor 201 and controls the first actuator 400 and the second actuator 500 to act simultaneously, so as to respectively cut off the measuring main pipeline 200 and the measuring outlet pipe 300 and open the pressure pipeline 600 to achieve bypass pressure relief, or respectively connect the measuring main pipeline 200 and the measuring outlet pipe 300 and cut off the pressure pipeline 600 to achieve normal fluid transportation.

[0028] Through the above implementation method, the coordinated control of the pressure sensor and dual actuators achieves millisecond-level response in situations of sudden pressure changes, effectively suppressing the risks of overpressure / underpressure. Compared with traditional mechanical safety valves, the efficiency of handling pressure anomalies is greatly improved, and system safety is significantly enhanced.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] In this invention, both the first actuator 400 and the second actuator 500 are explosion-proof electric three-way ball valves. The first actuator 400 has ports a, b, and c, where ports a and b are connected to the main measuring pipeline 200, and port c is connected to one end of the pressure pipeline 600. The second actuator 500 has ports e, f, and d, where ports e and d are connected to the measuring outlet pipe 300, and port f is connected to the other end of the pressure pipeline 600. In the measurement state of the pressure pipeline monitoring system 100, ports a and b of the first actuator 400 are connected, and ports e and d of the second actuator 500 are connected. In the bypass state of the pressure pipeline monitoring system 100, ports a and c of the first actuator 400 are connected, and ports f and d of the second actuator 500 are connected; in this state, the pressure pipeline 600 is bypassed and depressurized.

[0031] Even more advantageously, the pressure line 600 is a high-pressure hose, and its pressure-bearing range is greater than that of the measuring main line 200.

[0032] More advantageously, all pipeline connection nodes between the main measuring pipeline 200 and the first actuator 400, all pipeline connection nodes between the pressure pipeline monitoring system 100 and the main measuring pipeline 200 and the measuring outlet pipe 300, all pipeline connection nodes between the measuring outlet pipe 300 and the second actuator 500, and all pipeline connection nodes between both ends of the pressure pipeline 600 and the first actuator 400 and the second actuator 500 are connected by sealed flanges.

[0033] Even more advantageously, the system also has remote monitoring and fault diagnosis functions, allowing operators to monitor the equipment's working status in real time from the ground control center, promptly identify and handle potential faults, greatly reducing the frequency and risk of on-site inspections and improving operation and maintenance efficiency.

[0034] Installation and connection of this utility model device:

[0035] Step 1: Install pressure sensor 201 (model PCM-302) at the inlet section of the measuring main pipeline 200, ensuring that it is perpendicular to the pipeline axis and the installation spacing is ≤10 times the pipe diameter (compliant with GB / T20801 standard).

[0036] Step 2: Install the first actuator 400 and the second actuator 500 (model Q947F-40P-DN50-ExdIIBT4) through flanges to the inlet section of the measuring main pipeline 200 and the outlet section of the measuring outlet pipeline 300, respectively. Use metal spiral wound gaskets (pressure ≥ 2.5 times the design pressure) at the flange connection.

[0037] Step 3: A complete bypass circuit can be formed by connecting a DN50 high-pressure hose (pressure ≥3MPa) to the bypass port (C port, F port) of the actuator.

[0038] Control system configuration: The pressure pipeline monitoring system 100 presets high and low pressure thresholds (for example, the high pressure threshold is 90% to 95% of the system design pressure, and the low pressure threshold is 80% to 85% of the system working pressure), and supports dynamic adjustment (adjustment step ±0.01MPa).

[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] Workflow: Normal measurement mode: First actuator 400 is connected to ab, second actuator 500 is connected to ed. The medium flows through the main measuring pipe 200 into the pressure pipeline monitoring system 100 and flows out through the measuring outlet pipe 300. The pressure sensor 201 monitors the value within the set threshold range (e.g., 0.5-1.5 MPa).

[0041] Bypass pressure relief mode: When the pressure is 21.5MPa, the pressure pipeline monitoring system 100 synchronously drives the first actuator and the second actuator to switch to the AC port and the FD port. The medium is bypassed and relieved through the pressure pipeline 600, thereby avoiding damage to the monitoring devices in the pressure pipeline monitoring system 100, such as flow sensors and temperature sensors, caused by the high pressure medium.

[0042] Reset mechanism: After the pressure drops to a safe range, the actuator automatically resets to measurement mode. The reset delay time is adjustable (default 1s).

[0043] Application examples of this utility model

[0044] This device is installed at the inlet and outlet of the main valves of the oilfield's gathering and transportation pipeline, which is designed to withstand a pressure of 1.6 MPa. After installation, it achieves the following: suppressing the transient overpressure peak (2.1 MPa) to below 1.55 MPa, reducing fluctuation amplitude by 73%. Dynamic pressure relief reduces pump station energy consumption, resulting in annual electricity savings of 120,000 kWh. The modular design shortens the mean time to repair (MTTR) to 1 hour, reducing annual maintenance costs by 35%.

[0045] The implementation parameters can be as follows: Actuator model: Q947F-40P-DN50-ExdI IBT4 (explosion-proof rating ExdI IBT4, pressure resistance 4.0MPa). Pressure sensor: PCM-302 (range 0~2.5MPa, accuracy ±0.1%FS). Pressure pipeline monitoring system 100: Dual redundant PLC (Siemens S7-1200) realizes synchronous issuance of switching commands, with an error ≤10ms.

[0046] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0047] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A high-low pressure automatic switching device for a pressure pipeline monitoring system, characterized in that, include: A pressure line (600) has a first actuator (400) and a second actuator (500) connected to its two ends respectively; The measuring main pipeline (200) has a pressure sensor (201) installed at its inlet section. The pressure pipeline (600) is located behind the pressure sensor (201) and is connected to the measuring main pipeline (200) through the first actuator (400). A pressure pipeline monitoring system (100) has its inlet connected to the main measuring pipeline (200), and its outlet connected to a measuring outlet pipe (300). The measuring outlet pipe (300) is connected to the pressure pipeline (600) via a second actuator (500). The pressure pipeline monitoring system (100) is electrically connected to the pressure sensor (201), the first actuator (400), and the second actuator (500). Based on the pressure information received from the pressure sensor (201) monitoring the inlet section of the measuring main pipeline (200), the first actuator (400) and the second actuator (500) are controlled to operate simultaneously to respectively cut off the measuring main pipeline (200) and the measuring outlet pipe (300) and connect the pressure pipeline (600) to achieve bypass pressure relief, or to respectively connect the measuring main pipeline (200) and the measuring outlet pipe (300) and cut off the pressure pipeline (600) to achieve normal fluid transport.

2. The high / low pressure automatic switching device for a pressure pipeline monitoring system according to claim 1, characterized in that, Both the first actuator (400) and the second actuator (500) are explosion-proof electric three-way ball valves.

3. The high / low pressure automatic switching device for a pressure pipeline monitoring system according to claim 2, characterized in that, The first actuator (400) has ports a, b, and c, wherein ports a and b are connected to the main measuring pipeline (200), and port c is connected to one end of the pressure pipeline (600). The second actuator (500) has ports e, f, and d, wherein ports e and d are connected to the measuring outlet pipe (300), and port f is connected to the other end of the pressure pipeline (600). The measurement state of the pressure pipeline monitoring system (100) is as follows: ports a and b of the first actuator (400) are connected, and ports e and d of the second actuator (500) are connected. The bypass state of the pressure pipeline monitoring system (100) is as follows: ports a and c of the first actuator (400) are connected, and ports f and d of the second actuator (500) are connected. In this state, the pressure pipeline (600) is bypassed and depressurized.

4. The high / low pressure automatic switching device for a pressure pipeline monitoring system according to claim 1, characterized in that, The pressure line (600) is a high-pressure hose, and its pressure-bearing range is greater than that of the main measuring line (200).

5. A high-low pressure automatic switching device for a pressure pipeline monitoring system according to any one of claims 1-4, characterized in that, All pipeline connection nodes between the main measuring pipeline (200) and the first actuator (400), all pipeline connection nodes between the pressure pipeline monitoring system (100) and the main measuring pipeline (200) and the measuring outlet pipe (300), all pipeline connection nodes between the measuring outlet pipe (300) and the second actuator (500), and all pipeline connection nodes between both ends of the pressure pipeline (600) and the first actuator (400) and the second actuator (500) are connected by sealed flanges.

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