Flange oil leakage identification and detection system for power plant

Abstract

The utility model discloses a power plant flange oil leakage identification and detection system, which comprises pressure sensors and a vibration sensor arranged on two sides of a flange, the pressure sensors are arranged on a water inlet pipe and a water outlet pipe on two sides of the flange, and the vibration sensor is in magnetic attraction fit with a flange surface through a magnetic attraction mounting box. The vibration sensor and the pressure sensor are both electrically connected with the PLC, the PLC is in wireless signal connection with an external processor through a wireless communication device, the processor is electrically connected with a user terminal, flange installation at all positions is facilitated, meanwhile, whether oil leakage exists or not can be judged in time according to pressure difference changes and vibration signals, and therefore oil leakage is avoided. And the user terminal is notified to respond in time.

Description

Technical Field

[0001] This utility model relates to the field of power plant flange installation monitoring technology, and in particular to a power plant flange oil leakage identification and detection system. Background Technology

[0002] Flange oil leakage is a common problem in industrial equipment, leading not only to energy loss and environmental pollution but also potential safety accidents. The causes of flange oil leakage are varied, including damage to the sealing surfaces of the flange and gasket, improper material selection, improper installation, incorrect tightening, and insufficient or excessive tightening load. Furthermore, interface leakage failure at high temperatures, emergency shutdown of the equipment, or heavy rain can also cause flange leakage.

[0003] The existing monitoring methods for oil leaks in power plant flanges have the following problems:

[0004] 1. The device is complex to install and cannot be easily adjusted according to the actual situation;

[0005] 2. The notification is delayed, and the data usually only has a single evaluation standard, such as pressure difference or vibration, lacking comprehensive and rapid judgment conditions. Utility Model Content

[0006] This utility model provides a power plant flange oil leakage identification and detection system, which aims to solve the problems of poor installation portability and applicability of existing power plant flange oil leakage monitoring devices, and the lack of comprehensive and rapid judgment conditions.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0008] A power plant flange oil leakage identification and detection system includes pressure sensors and vibration sensors installed on both sides of the flange. Pressure sensors are installed on the inlet and outlet water pipes on both sides of the flange. The vibration sensors are magnetically attached to the flange surface through magnetic mounting boxes. Both the vibration sensors and pressure sensors are electrically connected to a PLC controller. The PLC controller is wirelessly connected to an external processor via a wireless communication device. The processor is electrically connected to a user terminal.

[0009] Preferably, the inlet and outlet pipes on both sides of the flange are provided with mounting ports, and pressure sensors are provided on the mounting ports, with the sensing ends of the pressure sensors located inside the corresponding water pipes.

[0010] Preferably, vibration sensors are provided on both sides of the flange.

[0011] More preferably, each side of the flange is provided with no less than two vibration sensors, which are arranged at equal intervals around the flange's central axis.

[0012] Furthermore, the vibration sensors on both sides correspond one-to-one, and the corresponding vibration sensors are symmetrical about the middle position of the flange.

[0013] Preferably, the magnetic mounting box includes a box body with a mounting hole at the center that fits the vibration sensor. When the vibration sensor is fully embedded into the mounting hole from the inlet, the vibration sensor and the mounting hole form a limiting fit, and the sensing end of the vibration sensor is flush with the inlet of the mounting hole. The other end of the vibration sensor passes through the outlet of the mounting hole. A magnet is embedded on the surface of the box body at the inlet of the mounting hole. When the box body is magnetically fixed to the flange surface by the magnet, the sensing end of the vibration sensor is in close contact with the flange surface.

[0014] More preferably, the surface of the box body located at the inlet of the mounting hole is provided with a mounting groove, the mounting groove is concentric and coaxial with the mounting hole, and the mounting groove is located outside the mounting hole, and the magnet is embedded and fixed in the mounting groove.

[0015] Furthermore, the side wall of the housing is provided with a limiting screw hole, which is radially connected to the mounting hole. The internal thread of the limiting screw hole is fitted with a limiting screw. When the limiting screw is tightened, the end of the limiting screw and the inner wall of the mounting hole form a pressing fit against the outer wall of the vibration sensor.

[0016] The beneficial effects of this utility model are:

[0017] The vibration sensors of this system can be installed at various points on the flange via magnetic mounting boxes. The installation location, number of sensors, and installation method can all be arranged according to the site conditions or actual monitoring needs. They are also easy to disassemble. Magnetic installation can be performed regardless of whether the vibration sensor is magnetic or not, which improves applicability and portability.

[0018] The system obtains vibration and differential pressure signals through vibration and pressure sensors, respectively, and makes a comprehensive judgment to avoid delays caused by a single type of signal. At the same time, after the signals are collected by the PLC controller, they are promptly transmitted remotely to the processor for processing and judgment via a wireless communication device. The final data and results are displayed on the terminal, allowing personnel to clearly understand the real-time situation at the monitored flange and respond promptly. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the installation of the pressure sensor and vibration sensor of this utility model at the flange.

[0020] Figure 2 This is a schematic diagram of the installation of the vibration sensor and magnetic mounting box of this utility model;

[0021] Figure 3 This is a schematic diagram showing the disassembly of the vibration sensor and magnetic mounting box of this utility model;

[0022] Figure 4 This is a schematic diagram of the system connection of this utility model;

[0023] In the diagram: 1. Flange; 2. Pressure sensor; 3. Vibration sensor; 4. Mounting port;

[0024] 5. Magnetic mounting box; 51. Box body; 52. Mounting hole; 53. Limiting screw hole; 54. Limiting screw; 55. Mounting groove; 56. Magnet. Detailed Implementation

[0025] The embodiments will be further described below with reference to the accompanying drawings.

[0026] like Figures 1-4 As shown in the preferred embodiment 1, a power plant flange oil leakage detection system includes pressure sensors 2 and vibration sensors 3 located on both sides of a flange 1. Pressure sensors 2 are installed on both the inlet and outlet water pipes on both sides of the flange 1. Vibration sensors 3 are magnetically attached to the flange 1 surface via magnetic mounting boxes 5. Both vibration sensors 3 and pressure sensors 2 are electrically connected to a PLC controller. The PLC controller is wirelessly connected to an external processor via a wireless communication device. The processor is electrically connected to a user terminal. By comprehensively judging the vibration and differential pressure signals, when either signal deviates from the normal set value, a warning is displayed on the user terminal, providing a timely response.

[0027] As a preferred embodiment 2, the pressure sensor 2 can be a Honeywell ST3000 series (range 0-25MPa), the vibration sensor 3 can be a PCB Piezotronics 352C03 (frequency response range 0.5Hz-10kHz), the PLC controller can be a Siemens S7 series model, the processor is a computer equipped with Intel Core i9 and NVIDIA A100, and the user terminal is a control display screen.

[0028] Both the inlet and outlet pipes on both sides of the flange 1 are equipped with mounting ports 4, and each mounting port 4 is equipped with a pressure sensor 2. The sensing end of the pressure sensor 2 is located inside the corresponding water pipe. This facilitates installation, and the differential pressure signal is obtained by calculating the difference between the pressure signals on both sides.

[0029] In a preferred embodiment 2, vibration sensors 3 are provided on both sides of the flange 1. Monitoring is performed on both sides to ensure the accuracy of the monitoring.

[0030] At least two vibration sensors 3 are provided on the flange 1 on each side, and the vibration sensors 3 are arranged at equal intervals around the central axis of the flange 1. Monitoring can be performed at multiple points.

[0031] The vibration sensors 3 on both sides are one-to-one, and the corresponding vibration sensors 3 are symmetrical about the middle position of flange 1. This ensures the accuracy of monitoring.

[0032] As a preferred embodiment 3, the magnetic mounting box 5 includes a box body 51. The center of the box body 51 is provided with a mounting hole 52 that fits with the vibration sensor 3. When the vibration sensor 3 is completely embedded into the mounting hole 52 from the inlet, the vibration sensor 3 and the mounting hole 52 form a limiting fit, and the end of the sensing end of the vibration sensor 3 is flush with the inlet of the mounting hole 52. The other end of the vibration sensor 3 passes through the outlet of the mounting hole 52. A magnet 56 is embedded on the surface of the box body 51 at the inlet of the mounting hole 52. When the box body 51 is magnetically fixed to the flange 1 by the magnet 56, the sensing end of the vibration sensor 3 is in close contact with the flange 1, ensuring magnetic fixation. At the same time, after fixation, normal signal reception is ensured.

[0033] For example, when the vibration sensor 3 is T-shaped, the mounting hole 52 is also T-shaped. The large-diameter end of the mounting hole 52 is the inlet. When the vibration sensor 3 is completely embedded in the mounting hole 52, a limiting fit is formed. At this time, the end of the sensing end of the vibration sensor 3 is just flush with the inlet of the mounting hole 52, ensuring that the vibration signal can be received smoothly after magnetic attraction.

[0034] A mounting groove 55 is provided on the surface of the housing 51 located at the inlet of the mounting hole 52. The mounting groove 55 is concentric and coaxial with the mounting hole 52, and is located outside the mounting hole 52. The magnet 56 is embedded and fixed in the mounting groove 55. This ensures the stability of the magnetic fixation of the magnet 56, and at the same time, the magnetic fixation and the installation of the sensor on the housing 51 do not interfere with each other.

[0035] The side wall of the housing 51 is provided with a limiting screw hole 53, which communicates radially with the mounting hole 52. A limiting screw 54 is threaded into the limiting screw hole 53. When the limiting screw 54 is tightened, the end of the limiting screw 54 and the inner wall of the mounting hole 52 form a pressing fit against the outer wall of the vibration sensor 3. This further ensures the stability of the sensor fixation, and even if it falls off, the housing 51 can also act as a protective device to buffer the movement.

[0036] The working principle of this utility model:

[0037] The vibration sensor 3 of this system can be installed at various points on the flange 1 through the magnetic mounting box 5. The installation position, number of installations and installation method can be arranged according to the site conditions or actual monitoring needs. It is also easy to disassemble. Regardless of whether the vibration sensor 3 is magnetic, it can be magnetically installed, which improves its applicability and portability.

[0038] The system obtains vibration signals and differential pressure signals through vibration sensor 3 and pressure sensor 2 respectively, and makes a comprehensive judgment to avoid delays caused by a single type of signal. At the same time, after the signal is collected by the PLC controller, it is promptly transmitted to the processor for processing and judgment via a wireless communication device. Finally, the data and results are displayed on the terminal, so that personnel can clearly know the real-time situation at the monitored flange and respond in a timely manner.

Claims

1. A power plant flange oil leakage identification detection system, comprising pressure sensors (2) and vibration sensors (3) arranged on both sides of a flange (1), characterized in that, Pressure sensors (2) are arranged on the water inlet pipe and the water outlet pipe on both sides of the flange (1), the vibration sensor (3) is magnetically attracted to the flange (1) disc surface through the magnetic attraction installation box (5), the vibration sensor (3) and the pressure sensor (2) are electrically connected with the PLC controller, the PLC controller is connected with the external processor through wireless communication device, and the processor is electrically connected with the terminal equipment.

2. A power plant flange oil leakage identification and detection system according to claim 1, characterized in that, The installation port (4) is arranged on the water inlet pipe and the water outlet pipe on both sides of the flange (1), the pressure sensor (2) is arranged on the installation port (4), and the sensing end of the pressure sensor (2) is located in the corresponding water pipe.

3. The power plant flange oil leakage identification and detection system of claim 1, wherein, The vibration sensor (3) is arranged on both sides of the flange (1).

4. The power plant flange oil leakage identification and detection system of claim 3, wherein, The vibration sensor (3) is arranged on both sides of the flange (1).

5. A power plant flange leak identification system according to claim 4, wherein, The vibration sensor (3) is arranged on both sides of the flange (1).

6. The flange leakage identification and detection system of a power plant according to any one of claims 1-5, characterized in that, The magnetic attraction installation box (5) comprises a box body (51), the box body (51) is provided with a mounting hole (52) matched with the vibration sensor (3) at the center, when the vibration sensor (3) is completely embedded in the mounting hole (52) from the inlet of the mounting hole (52), the vibration sensor (3) is limitedly matched with the mounting hole (52), and the sensing end of the vibration sensor (3) is flush with the inlet of the mounting hole (52), the other end of the vibration sensor (3) penetrates from the outlet of the mounting hole (52), the surface of the box body (51) is embedded with a magnet (56) at the inlet of the mounting hole (52), when the box body (51) is magnetically attracted and fixed to the flange (1) disc surface through the magnet (56), the sensing end of the vibration sensor (3) is tightly attached to the flange (1) disc surface.

7. A power plant flange leak identification system according to claim 6, wherein, The surface of the box body (51) at the inlet of the mounting hole (52) is provided with a mounting groove (55), the mounting groove (55) is concentric and coaxial with the mounting hole (52), and the mounting groove (55) is arranged outside the mounting hole (52), and the magnet (56) is embedded and fixed in the mounting groove (55).

8. A power plant flange leak identification system according to claim 7, wherein, The side wall of the box body (51) is provided with a limiting screw hole (53), the limiting screw hole (53) is in communication with the mounting hole (52) along the radial direction, the limiting screw hole (53) is threadedly connected with a limiting screw (54), and when the limiting screw (54) is tightened, the end of the limiting screw (54) and the inner wall of the mounting hole (52) are pressed against the outer wall of the vibration sensor (3).

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