A Multifunctional On-line Monitoring Device and Method for High-voltage CT Metal Expander

Abstract

The present invention discloses a multifunctional on-line monitoring device and method for a high-voltage CT metal expander, belonging to the technical field of on-line monitoring, including a mounting flange; a shielding plate is fixedly installed in the middle of the mounting flange, and a mounting groove is formed on the upper side of the shielding plate; a shielding cover is installed on the upper side of the shielding plate; a ranging sensor and a pressure sensor are fixedly installed on the upper side of the shielding plate, and the detection probes of the ranging sensor and the pressure sensor pass through the shielding plate; a control box and a gas release mechanism are installed on the upper side of the shielding plate; an oil delivery component is installed inside the shielding cover and on the upper side of the shielding plate; and the pressure sensor, the control box, the oil delivery component and the gas release mechanism are all located inside the shielding cover; the gas release mechanism includes a gas release component and an air outlet component, and the gas release component and the air outlet component are installed on the shielding plate. By the above method, the data of the ranging sensor and the pressure sensor are read every two hours, and according to the read values, the device re-enters the low-power consumption mode, exhausts gas or replenishes oil.

Description

Technical Field

[0001] The present invention relates to the technical field of on-line monitoring, and particularly relates to a multi-functional on-line monitoring device and method for a high-voltage CT metal expander. Background Art

[0002] The current transformer is one of the main equipment in the substation, which converts the large current in the substation into a small current and plays an indispensable role in aspects such as relay protection, automatic control, signal indication, and electric energy metering. In recent years, there have been many incidents of the expander of the current transformer hitting the top. There was once a situation where the two sets of bus differential protections in a 220 kV substation tripped. The analysis result was that the metal expander of the switch current transformer in the 220 kV outgoing line interval hit the top, causing partial dislocation and deformation at the top and both sides of the iron core housing.

[0003] The high-voltage CT plays an indispensable role in the power system. However, there are some problems in the on-site observation of the CT oil level. For example, the observation distance is relatively far, and the observation window will become blurred after a long time, which brings inconvenience to the usual inspections. At the same time, partial discharge occurs at the loose position, causing the transformer oil to crack. After a long time of operation, a large amount of gas accumulates, resulting in the expander hitting the top. If the gas is directly discharged, it is easy to pollute the environment. Moreover, the reduction of the oil level in the metal expander due to the cracking of the transformer oil will affect the normal use.

[0004] Based on this, the present invention designs a multi-functional on-line monitoring device and method for a high-voltage CT metal expander to solve the above problems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a multi-functional on-line monitoring device and method for a high-voltage CT metal expander aiming at the deficiencies of the above-mentioned prior art.

[0006] To solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A multi-functional on-line monitoring device for a high-voltage CT metal expander includes a mounting flange; a shielding plate is fixedly installed in the middle of the mounting flange, and a mounting groove is opened on the upper side of the mounting flange; a shielding cover is installed on the upper side of the shielding plate; a distance measuring sensor and a pressure sensor are fixedly installed on the upper side of the shielding plate, and the detection probes of the distance measuring sensor and the pressure sensor pass through the shielding plate; a control box and a gas release mechanism are installed on the upper side of the shielding plate; an oil delivery component is installed inside the shielding cover and on the upper side of the shielding plate; and the pressure sensor, the control box, the oil delivery component and the gas release mechanism are all located inside the shielding cover; the gas release mechanism includes a gas release component and an air outlet component, and the gas release component and the air outlet component are installed on the shielding plate; a timer, a control chip and a clock chip are arranged inside the control box.

[0008] Furthermore, a breathing airbag is arranged inside the oil delivery component, and the breathing airbag is communicated with the gas release component through a hose.

[0009] Further, an installation ring inserted into the installation groove is fixedly installed at the bottom edge of the shielding cover. A slot is formed at the edge of the shielding plate, and a plug is fixedly installed at the inner edge of the installation ring. The slot and the plug are inserted into each other.

[0010] Further, the oil delivery assembly includes an oil storage box and an oil delivery valve. The oil storage box is fixedly installed at the inner top of the shielding cover, and an oil delivery valve is fixedly installed on the upper side of the shielding plate. The bottom of the oil delivery valve passes through the shielding plate, and the top of the oil delivery valve passes through the oil storage box; the oil storage box is communicated with the metal expander on the lower side of the shielding plate through the oil delivery valve.

[0011] Further, the air release assembly includes a first air release valve, a hose and a connecting pipe. The first air release valve is fixedly installed on the upper side of the shielding plate, and the bottom end of the first air release valve passes through the shielding plate; the top of the first air release valve is fixedly connected to one end of the hose; the other end of the hose passes through the outer wall of the oil storage box, and the other end of the hose is communicated with one end of the breathing airbag inside the oil storage box; the other end of the breathing airbag is fixedly connected to one end of the connecting pipe, and the other end of the connecting pipe passes through the oil storage box; the connecting pipe is communicated with the metal expander on the lower side of the shielding plate through the breathing airbag, the hose and the first air release valve.

[0012] Further, the air release assembly further includes a buffer airbag, and the buffer airbag is fixedly installed on the upper side of the shielding plate and is communicated with the other end of the connecting pipe.

[0013] Further, the air outlet assembly includes an oil filter box, a top plate, an oil-gas separation membrane and an air outlet pipe. The oil filter box is fixedly installed on the upper side of the shielding plate, and the top plate is fixedly installed on the top of the oil filter box; one side of the top plate is communicated with the buffer airbag through a connecting pipe, and the other side of the top plate is fixedly installed with the air outlet pipe; the upper end of the air outlet pipe passes through the shielding cover, and the lower end of the air outlet pipe is fixedly installed with the oil-gas separation membrane; the top plate is inclined, the upper side of the top plate is communicated with the buffer airbag, and the air outlet pipe is installed on the lower side of the top plate.

[0014] Further, the air outlet assembly further includes a closing valve, and the closing valve is fixedly installed at the top of the air outlet pipe.

[0015] Further, an oil return valve for recovering the liquid oil in the discharged gas is fixedly installed on the lower side of the shielding plate, and the upper side of the oil return valve passes through the shielding plate and is communicated with the oil filter box.

[0016] In order to better achieve the purpose of the present invention, the present invention also provides a use method of a multifunctional on-line monitoring device for a high-voltage CT metal expander, including the following steps:

[0017] Step 1: The clock core triggers a timer interrupt every two hours. Subsequently, the pin starts the power supply of the circuit board through an external circuit. After the internal program of the control chip runs, the data of the ranging sensor and the air pressure sensor are read;

[0018] Step 2: If the data of the ranging sensor and the barometric pressure sensor are normal, the timer restarts timing and enters the low-power mode, waiting for the next trigger; if the data of the barometric pressure sensor is higher than the set value and the value of the ranging sensor is within the predetermined range, then Step 3 is executed; if the readings of both the ranging sensor and the barometric pressure sensor are higher than the predetermined values, then Steps 4 and 5 are executed;

[0019] Step 3: Open the first air release valve and the closing valve. The gas in the metal expander enters the breathing airbag through the hose and is then delivered to the buffer airbag through the connecting pipe. The breathing airbag does not expand under the pressure of the oil in the oil storage box, and the buffer airbag expands within the shielding cover. The gas in the buffer airbag is slowly released from the upper side of the top plate into the oil filter box through the connecting pipe. Subsequently, the gas passes through the oil-gas separation membrane on the lower side of the top plate. The oil in the gas is blocked by the oil-gas separation membrane, and the gas passes through the oil-gas separation membrane and is discharged from the air outlet pipe. The oil adhering to the lower side of the top plate and inside the oil filter box falls onto the upper side of the oil return valve. After the data of the barometric pressure sensor is normal, close the first air release valve and the closing valve. The timer restarts timing and enters the low-power mode, waiting for the next trigger;

[0020] Step 4: Close the closing valve, and open the first air release valve, the oil supply valve, and the oil return valve. The gas in the metal expander flows into the first air release valve, the hose, the breathing airbag, the connecting pipe, the buffer airbag, the oil filter box, and the air outlet pipe in sequence. The breathing airbag and the buffer airbag expand, so that the air pressure in the metal expander is the same as the air pressure in the breathing airbag, the buffer airbag, and the oil filter box. The breathing airbag expands in the oil storage box, thereby squeezing the oil in the oil storage box, and the oil is delivered to the metal expander through the oil supply valve to achieve oil replenishment. At the same time, the air pressure in the oil filter box pushes the oil in the oil filter box to flow back to the metal expander through the oil return valve, so that the oil after being filtered by the oil-gas separation membrane flows back to the metal expander. Until the value read by the ranging sensor reaches the predetermined value;

[0021] Step 5: Close the oil supply valve and the oil return valve, and open the closing valve. The gas filters the oil through the oil-gas separation membrane and is discharged through the air outlet pipe. After the reading of the barometric pressure sensor is within the normal range, close the first air release valve and the closing valve. The timer restarts timing and enters the low-power mode, waiting for the next trigger.

[0022] The present invention has the following beneficial effects:

[0023] The clock chip triggers a timer interrupt every two hours. Subsequently, the pin starts the power supply of the circuit board through an external circuit. After the internal program of the control chip runs, the data of the ranging sensor and the barometric pressure sensor are read. If the data of the ranging sensor and the barometric pressure sensor are normal, the timer restarts timing and enters the low-power mode, waiting for the next trigger; thus realizing low-power operation and extending the service life of the device.

[0024] If the data of the ranging sensor is normal and the data of the air pressure sensor is higher than the predetermined value, the air release assembly and the air outlet assembly are started. After the air release assembly discharges the gas in the metal expander into the breathing bag, the gas in the breathing bag is filtered by the air outlet assembly and then discharged, and the oil in the gas falls back into the air outlet assembly. Through the air outlet assembly as a buffer, the gas is discharged slowly, thereby increasing the oil-gas separation time, making the oil and gas separation more thorough, and avoiding the oil in the discharged gas from polluting the air and equipment. Thus, while ensuring the gas discharge, it avoids the metal expander from being damaged due to gas surging, extends the service life of the equipment, effectively improves the safety of the equipment, and effectively avoids environmental pollution.

[0025] If the data of both the ranging sensor and the air pressure sensor are higher than the predetermined value, then the air pressure in the metal expander is too high and the oil is insufficient at this time. First, start the oil delivery assembly, the oil return valve and the air release assembly, and close the air outlet assembly. The gas in the metal expander is discharged into the breathing bag and the air outlet assembly through the air release assembly. The expansion of the breathing bag equalizes the pressure in the oil delivery assembly and the pressure in the metal expander, so that the oil in the oil delivery assembly can flow smoothly into the metal expander. At the same time, the oil filtered and retained in the air outlet assembly is sent back into the metal expander through the oil return valve, so that the oil is fully utilized. The oil level in the metal expander is detected by the air pressure sensor. After the oil level reaches the predetermined value, the oil delivery assembly is closed and the air outlet assembly is opened, so that the gas in the breathing bag and the air outlet assembly is discharged after being filtered. Thus, the oil is replenished in time, the use of the equipment is guaranteed, the equipment is prevented from being damaged by surging, and the power supply reliability of the power system is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a three-dimensional view of a multifunctional on-line monitoring device for a high-voltage CT metal expander according to the present invention Figure 1 ;

[0027] Figure 2 is a front view of a multifunctional on-line monitoring device for a high-voltage CT metal expander according to the present invention;

[0028] Figure 3 is a three-dimensional view of a multifunctional on-line monitoring device for a high-voltage CT metal expander according to the present invention Figure 2 ;

[0029] Figure 4 is a three-dimensional view of a multifunctional on-line monitoring device for a high-voltage CT metal expander according to the present invention Figure 3 ;

[0030] Figure 5 is a sectional view taken along the Figure 2 A-A direction;

[0031] Figure 6 is a schematic diagram of the shielding plate and its connection structure;

[0032] Figure 7 Schematic diagram of the shielding plate and its connection structure after removing the oil storage box obstruction.

[0033] The labels in the figure respectively represent:

[0034] 1. Installation flange; 11. Shielding plate; 12. Installation groove; 2. Shielding cover; 21. Installation ring; 22. Slot; 23. Insert block; 3. Distance measuring sensor; 4. Air pressure sensor; 5. Control box; 6. Oil delivery assembly; 61. Oil storage box; 62. Oil delivery valve; 7. Air release mechanism; 71. Air release assembly; 711. First air release valve; 712. Hose; 713. Connecting pipe; 714. Buffer airbag; 72. Air outlet assembly; 721. Oil filter box; 722. Top plate; 723. Oil and gas separation membrane; 724. Air outlet pipe; 725. Shut-off valve; 8. Breathing airbag; 9. Oil return valve; 10. Metal expander. Specific embodiments

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific preferred embodiments.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "left side", "right side", "upper part", "lower part", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second", etc. do not represent the importance of the components, so it cannot be understood as a limitation to the present invention. The specific dimensions adopted in this embodiment are only for illustrating the technical solution and do not limit the protection scope of the present invention.

[0037] Embodiment 1

[0038] In some embodiments, please refer to the accompanying drawings of the specification Figures 1-5 , a multifunctional on-line monitoring device for high-voltage CT metal expanders, including an installation flange 1; a shielding plate 11 is fixedly installed in the middle of the installation flange 1, and an installation groove 12 is opened on the upper side of the installation flange 1; a shielding cover 2 is installed on the upper side of the shielding plate 11; a distance measuring sensor 3 and an air pressure sensor 4 are fixedly installed on the upper side of the shielding plate 11, and the detection probes of the distance measuring sensor 3 and the air pressure sensor 4 pass through the shielding plate 11 and are connected to the metal expander 10; a control box 5 and an air release mechanism 7 are installed on the upper side of the shielding plate 11; an oil delivery assembly 6 is installed inside the shielding cover 2 and on the upper side of the shielding plate 11; and the air pressure sensor 4, the control box 5, the oil delivery assembly 6 and the air release mechanism 7 are all located inside the shielding cover 2; the air release mechanism 7 includes an air release assembly 71 and an air outlet assembly 72, and the air release assembly 71 and the air outlet assembly 72 are installed on the shielding plate 11.

[0039] The oil delivery assembly 6 is provided with a breathing airbag 8, and the breathing airbag 8 is communicated with the air release assembly 71 through a hose. The ranging sensor 3 is set as a VL53L0X laser ranging sensor for detecting the position of the oil in the metal expander 10; the air pressure sensor 4 is set as a high-frequency air pressure sensor for detecting the air pressure in the metal expander 10.

[0040] The control box 5 is provided with an RTC timer. The domestic chip CH32F103C8T6 is used as the control chip, and the PCF8563 is used as the low-power clock chip to realize periodic data in the low-power mode.

[0041] A return oil valve 9 for recovering the liquid oil in the discharged gas is fixedly installed on the lower side of the shielding plate 11. The upper side of the return oil valve 9 passes through the shielding plate 11 and is communicated with the air outlet assembly 72.

[0042] In this embodiment, when the multifunctional high-voltage CT metal expander online monitoring device works normally, the clock chip triggers a timer interrupt every two hours. Subsequently, the pin starts the power supply of the circuit board through an external circuit. After the internal program of the control chip runs, the data of the ranging sensor 3 and the air pressure sensor 4 are read; if the data of the ranging sensor 3 and the air pressure sensor 4 are normal, the timer starts timing again and enters the low-power mode, waiting for the next trigger; if the data of the ranging sensor 3 is normal and the data of the air pressure sensor 4 is higher than the predetermined value, the air release assembly 71 and the air outlet assembly 72 are started. After the air release assembly 71 discharges the gas in the metal expander 10 into the breathing airbag 8, the gas in the breathing airbag 8 is filtered by the air outlet assembly 72 and then discharged. The oil in the gas falls back into the air outlet assembly 72; through the air outlet assembly 72 as a buffer, the gas is discharged slowly, so as to increase the oil-gas separation time, make the oil and gas separation more thorough, and avoid the oil in the discharged gas from polluting the air and the equipment; thus, on the premise of ensuring the gas discharge, the equipment safety is effectively improved, and environmental pollution is effectively avoided.

[0043] If the data of both the distance measuring sensor 3 and the air pressure sensor 4 are higher than the predetermined values, the air pressure in the metal expander 10 is too high and the oil is insufficient at this time. First, start the oil delivery assembly 6, the oil return valve 9 and the air release assembly 71, and close the air outlet assembly 72. Discharge the gas in the metal expander 10 into the breathing airbag 8 and the air outlet assembly 72 through the air release assembly 71. The expansion of the breathing airbag 8 equalizes the pressure in the oil delivery assembly 6 and the pressure in the metal expander 10, so that the oil in the oil delivery assembly 6 can flow smoothly into the metal expander 10. At the same time, the oil filtered and retained in the air outlet assembly 72 is sent back into the metal expander 10 through the oil return valve 9 to make full use of the oil. Detect the oil level in the metal expander 10 through the air pressure sensor 4. After the oil level reaches the predetermined value, close the oil delivery assembly 6 and open the air outlet assembly 72 to discharge the gas in the breathing airbag 8 and the air outlet assembly 72 after filtration. Thus, the position of the CT metal expander is monitored in real time, and manual inspection is replaced by digital means to improve work efficiency and accuracy, providing guarantee for the safe and reliable operation of the power grid.

[0044] Embodiment 2

[0045] In some embodiments, such as Figures 1-7 shown, as a preferred embodiment of the present invention, an installation ring 21 inserted into the installation groove 12 is fixedly installed at the bottom edge of the shielding cover 2. A slot 22 is formed at the edge of the shielding plate 11. An insertion block 23 is fixedly installed at the inner edge of the installation ring 21, and the slot 22 and the insertion block 23 are inserted. The oil delivery assembly 6 includes an oil storage box 61 and an oil delivery valve 62. The oil storage box 61 is fixedly installed at the inner top of the shielding cover 2. An oil delivery valve 62 is fixedly installed on the upper side of the shielding plate 11. The bottom of the oil delivery valve 62 passes through the shielding plate 11, and the top of the oil delivery valve 62 passes through the oil storage box 61. The oil storage box 61 is communicated with the metal expander 10 on the lower side of the shielding plate 11 through the oil delivery valve 62. The air release assembly 71 includes a first air release valve 711, a hose 712 and a connecting pipe 713. The first air release valve 711 is fixedly installed on the upper side of the shielding plate 11, and the bottom end of the first air release valve 711 passes through the shielding plate 11. The top of the first air release valve 711 is fixedly connected to one end of the hose 712. The other end of the hose 712 passes through the outer wall of the oil storage box 61, and the other end of the hose 712 is communicated with one end of the breathing airbag 8 in the oil storage box 61. The other end of the breathing airbag 8 is fixedly connected to one end of the connecting pipe 713, and the other end of the connecting pipe 713 passes through the oil storage box 61. The connecting pipe 713 is communicated with the metal expander 10 on the lower side of the shielding plate 11 through the breathing airbag 8, the hose 712 and the first air release valve 711.

[0046] The air release assembly 71 further includes a buffer airbag 714, which is fixedly installed on the upper side of the shielding plate 11. The buffer airbag 714 is communicated with the other end of the communication pipe 713. The air outlet assembly 72 includes an oil filter box 721, a top plate 722, an oil-gas separation membrane 723 and an air outlet pipe 724. The oil filter box 721 is fixedly installed on the upper side of the shielding plate 11, and the top plate 722 is fixedly installed on the top of the oil filter box 721. One side of the top plate 722 is communicated with the buffer airbag 714 through a connecting pipe, and the other side of the top plate 722 is fixedly installed with the air outlet pipe 724. The upper end of the air outlet pipe 724 passes through the shielding cover 2, and the lower end of the air outlet pipe 724 is fixedly installed with the oil-gas separation membrane 723. The top plate 722 is inclined, the upper side of the top plate 722 is communicated with the buffer airbag 714, and the air outlet pipe 724 is installed on the lower side of the top plate 722.

[0047] The air outlet assembly 72 further includes a closing valve 725, which is fixedly installed on the top of the air outlet pipe 724. A return oil valve 9 for recovering the liquid oil in the discharged gas is further fixedly installed on the lower side of the shielding plate 11. The upper side of the return oil valve 9 passes through the shielding plate 11 and is communicated with the oil filter box 721.

[0048] In this embodiment, when the oil delivery assembly 6 and the air release mechanism 7 are working properly, if the reading of the air pressure sensor 4 is higher than the predetermined value and the value of the ranging sensor 3 is within the predetermined range, the first air release valve 711 and the closing valve 725 are opened at this time. The gas in the metal expander 10 enters the breathing airbag 8 through the hose 712 and is then delivered to the buffer airbag 714 through the connecting pipe 713. The breathing airbag 8 does not expand under the pressure of the oil in the oil storage box 61, and the buffer airbag 714 expands in the shielding cover 2; the gas in the buffer airbag 714 is slowly released from the upper side of the top plate 722 into the oil filter box 721 through the connecting pipe, and then the gas passes through the oil-gas separation membrane 723 on the lower side of the top plate 722. The oil in the gas is blocked by the oil-gas separation membrane 723, and the gas passes through the oil-gas separation membrane 723 and is discharged from the air outlet pipe 724; the oil adhering to the lower side of the top plate 722 and in the oil filter box 721 falls to the upper side of the oil return valve 9; if the readings of both the ranging sensor 3 and the air pressure sensor 4 are higher than the predetermined value, the closing valve 725 is closed at this time, and the first air release valve 711, the oil delivery valve 62, and the oil return valve 9 are opened; the gas in the metal expander 10 flows into the first air release valve 711, the hose 712, the breathing airbag 8, the connecting pipe 713, the buffer airbag 714, the oil filter box 721, and the air outlet pipe 724 in sequence. The breathing airbag 8 and the buffer airbag 714 expand, so that the air pressure in the metal expander 10 is the same as the air pressure in the breathing airbag 8, the buffer airbag 714, and the oil filter box 721. The breathing airbag 8 expands in the oil storage box 61, thereby squeezing the oil in the oil storage box 61, and the oil is delivered to the metal expander 10 through the oil delivery valve 62 to achieve oil replenishment; at the same time, the air pressure in the oil filter box 721 pushes the oil in the oil filter box 721 to flow back to the metal expander 10 through the oil return valve 9, so that the oil filtered by the oil-gas separation membrane 723 flows back, thereby realizing the full utilization of the oil and avoiding oil discharge from polluting the environment; until the value read by the ranging sensor 3 reaches the predetermined value; the oil delivery valve 62 and the oil return valve 9 are closed, and the closing valve 725 is opened. The gas filters the oil through the oil-gas separation membrane 723 and is discharged through the air outlet pipe 724; after the reading of the air pressure sensor 4 is within the normal range, the first air release valve 711 and the closing valve 725 are closed; at the same time, the timer starts timing again and enters the low-power mode, waiting for the next trigger.

[0049] Embodiment III

[0050] In some embodiments, such as Figures 1-7 shown, to better achieve the purpose of the present invention, the present invention also provides a usage method of a multifunctional high-voltage CT metal expander online monitoring device, including the following steps:

[0051] Step 1: The clock core triggers a timing interrupt every two hours. Subsequently, the pin starts the power supply of the circuit board through an external circuit. After the internal program of the control chip runs, the data of the ranging sensor 3 and the air pressure sensor 4 are read;

[0052] Step 2: If the data of the ranging sensor 3 and the air pressure sensor 4 are normal, the timer will restart timing and enter the low-power mode, waiting for the next trigger; if the data of the air pressure sensor 4 is higher than the set value and the value of the ranging sensor 3 is within the predetermined range, then Step 3 is executed; if the readings of both the ranging sensor 3 and the air pressure sensor 4 are higher than the predetermined values, then Steps 4 and 5 are executed;

[0053] Step 3: Open the first air release valve 711 and the closing valve 725. The gas in the metal expander 10 enters the breathing airbag 8 through the hose 712 and is then transported to the buffer airbag 714 through the connecting pipe 713. The breathing airbag 8 does not expand under the pressure of the oil in the oil storage box 61, while the buffer airbag 714 expands within the shielding cover 2. The gas in the buffer airbag 714 is slowly released from the upper side of the top plate 722 into the oil filter box 721 through the connecting pipe. Subsequently, the gas passes through the oil-gas separation membrane 723 on the lower side of the top plate 722. The oil in the gas is blocked by the oil-gas separation membrane 723, and the gas passes through the oil-gas separation membrane 723 and is discharged from the air outlet pipe 724. The oil adhering to the lower side of the top plate 722 and inside the oil filter box 721 falls onto the upper side of the oil return valve 9. After the data of the air pressure sensor 4 is normal, close the first air release valve 711 and the closing valve 725. The timer restarts timing and enters the low-power mode, waiting for the next trigger;

[0054] Step 4: Close the closing valve 725, and open the first air release valve 711, the oil supply valve 62, and the oil return valve 9. The gas in the metal expander 10 flows successively into the first air release valve 711, the hose 712, the breathing airbag 8, the connecting pipe 713, the buffer airbag 714, the oil filter box 721, and the air outlet pipe 724. The breathing airbag 8 and the buffer airbag 714 expand, so that the air pressure in the metal expander 10 is the same as the air pressure in the breathing airbag 8, the buffer airbag 714, and the oil filter box 721. The breathing airbag 8 expands within the oil storage box 61, thereby squeezing the oil in the oil storage box 61, and the oil is transported into the metal expander 10 through the oil supply valve 62 to achieve oil replenishment. At the same time, the air pressure in the oil filter box 721 pushes the oil in the oil filter box 721 to flow back into the metal expander 10 through the oil return valve 9, so that the oil filtered by the oil-gas separation membrane 723 flows back into the metal expander 10. This continues until the value read by the ranging sensor 3 reaches the predetermined value;

[0055] Step 5: Close the oil supply valve 62 and the oil return valve 9, and open the closing valve 725. The gas passes through the oil-gas separation membrane 723 to filter the oil and is then discharged through the air outlet pipe 724. After the reading of the air pressure sensor 4 is within the normal range, close the first air release valve 711 and the closing valve 725. The timer restarts timing and enters the low-power mode, waiting for the next trigger.

[0056] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and these equivalent transformations all fall within the protection scope of the present invention.

Claims

1. A multifunctional high-pressure CT metal expander online monitoring device for monitoring a metal expander (10), characterized in that: It comprises a mounting flange (1), a shielding plate (11), a shielding cover (2), a distance sensor (3), an air pressure sensor (4), an oil delivery component (6), an air release mechanism (7) and a control box (5); The mounting flange (1) is connected to the top of the metal expander (10), the shielding plate (11) is mounted in the middle of the mounting flange (1), the shielding cover (2) is mounted above the shielding plate (11), the distance sensor (3), the air pressure sensor (4), the oil delivery component (6), the air release mechanism (7) and the control box (5) are all arranged on the shielding plate (11) inside the shielding cover (2), and the detection probe of the air pressure sensor (4) and the detection probe of the distance sensor (3) pass through the shielding plate (11) to communicate with the metal expander (10), and the control box (5) is respectively connected to the distance sensor (3), the air pressure sensor (4), the oil delivery component (6) and the air release mechanism (7); The oil delivery assembly (6) comprises an oil storage box (61) and an oil delivery valve (62); the oil storage box (61) is fixedly mounted on the inner top of the shielding cover (2); the oil delivery valve (62) is fixedly mounted on the shielding plate (11); the bottom of the oil delivery valve (62) passes through the shielding plate (11); and the top of the oil delivery valve (62) passes through the oil storage box (61); the oil storage box (61) is connected to the metal expander (10) on the lower side of the shielding plate (11) through the oil delivery valve (62); The oil delivery assembly (6) further comprises a breathing air bag (8) which is arranged inside the oil storage box (61), and the breathing air bag (8) is connected to the deflation mechanism (7); The deflation mechanism (7) comprises a deflation component (71) and an air outlet component (72); the deflation component (71) comprises a first deflation valve (711), a cushioning air bag (714), a hose (712) and a connecting pipe (713); the first deflation valve (711) is fixedly mounted on the upper side of the shielding plate (11); the bottom end of the first deflation valve (711) passes through the shielding plate (11) and is connected to the metal expander (10); the top of the first deflation valve (711) is fixedly connected to one end of the hose (712); the other end of the hose (712) passes through the metal expander (10); The other end of the hose (712) passes through the outer wall of the oil storage box (61), and is connected to one end of the breathing airbag (8) in the oil storage box (61); the other end of the breathing airbag (8) is fixedly connected to one end of the connecting pipe (713); the buffer airbag (714) is fixedly mounted on the upper side of the shielding plate (11), and the other end of the connecting pipe (713) is connected to the buffer airbag (714); the connecting pipe (713) is connected to the metal expander (10) on the lower side of the shielding plate (11) through the breathing airbag (8), the hose (712) and the first air release valve (711).

2. A multifunctional high-pressure CT metal expander online monitoring device according to claim 1, characterized in that: The mounting flange (1) is provided with a mounting groove (12), the bottom edge of the shielding cover (2) is further provided with a mounting ring (21) plugged into the mounting groove (12), and the edge of the shielding plate (11) is provided with a slot (22), an insert block (23) is fixedly mounted on the inner edge of the mounting ring (21), and the slot (22) and the insert block (23) are plugged into each other.

3. The multifunctional high-pressure CT metal expander online monitoring device according to claim 1 is characterized in that: The air outlet assembly (72) comprises an oil filter box (721), a top plate (722), an oil-gas separation membrane (723) and an air outlet pipe (724); the oil filter box (721) is fixedly mounted on the upper side of the shielding plate (11), and the top plate (722) is fixedly mounted on the top of the oil filter box (721); one side of the top plate (722) is connected to the buffer air bag (714) through a connecting pipe (713), and the other side of the top plate (722) is fixedly mounted with the air outlet pipe (724); the upper end of the air outlet pipe (724) passes through the shielding cover (2), and the lower end of the air outlet pipe (724) is fixedly mounted with the oil-gas separation membrane (723); the top plate (722) is arranged obliquely, the upper side of the top plate (722) is connected to the buffer air bag (714), and the air outlet pipe (724) is mounted on the lower side of the top plate (722).

4. The multifunctional high-pressure CT metal expander online monitoring device according to claim 3 is characterized in that: The air outlet assembly (72) further comprises a closing valve (725), wherein the closing valve (725) is fixedly mounted on the top of the air outlet pipe (724).

5. The multifunctional high-pressure CT metal expander online monitoring device according to claim 4 is characterized in that: An oil return valve (9) for recovering liquid oil in the exhaust gas is also fixedly mounted on the lower side of the shielding plate (11); the upper side of the oil return valve (9) passes through the shielding plate (11) and is communicated with the oil filter box (721); and the lower side of the oil return valve (9) is communicated with the metal expander (10).

6. The multifunctional high-pressure CT metal expander online monitoring device according to claim 5, characterized in that: The control box (5) is provided with a timer, a control chip and a low-power clock chip.

7. A method for using the multifunctional high-pressure CT metal expander online monitoring device according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1: The clock chip triggers a timing interrupt every two hours, and then the pin starts the circuit board power supply through the external circuit. After the internal program of the control chip runs, the data of the distance sensor (3) and the pressure sensor (4) are read; Step 2: If the data of the distance sensor (3) and the air pressure sensor (4) are normal, the timer will be reset and enter the low power consumption mode, waiting for the next trigger; if the data of the air pressure sensor (4) is higher than the set value, and the value of the distance sensor (3) is within the predetermined range, step 3 will be executed; if the readings of the distance sensor (3) and the air pressure sensor (4) are both higher than the predetermined values, steps 4 and 5 will be executed; Step 3: Open the first air release valve (711) and the closing valve (725), and the gas in the metal expander (10) enters the breathing airbag (8) through the hose (712) and is then transported to the buffer airbag (714) through the connecting pipe (713). The breathing airbag (8) does not expand under the pressure of the oil in the oil storage box (61), and the buffer airbag (714) expands in the shielding cover (2); the gas in the buffer airbag (714) is slowly released from the upper side of the top plate (722) to the oil filter box (721) through the connecting pipe. The gas then passes through the oil-gas separation membrane (723) on the lower side of the top plate (722), and the oil in the gas is blocked by the oil-gas separation membrane (723). The gas passes through the oil-gas separation membrane (723) and is discharged from the gas outlet pipe (724); the oil adhering to the lower side of the top plate (722) and the oil filter box (721) falls to the upper side of the oil return valve (9); after the data of the air pressure sensor (4) is normal, the first air release valve (711) and the closing valve (725) are closed; the timer is reset, and the system enters the low power consumption mode, waiting for the next trigger; Step 4: Close the closing valve (725), open the first air release valve (711), the oil delivery valve (62) and the oil return valve (9); the gas in the metal expander (10) flows into the first air release valve (711), the hose (712), the breathing air bag (8), the connecting pipe (713), the buffer air bag (714), the oil filter box (721) and the air outlet pipe (724) in sequence, and the breathing air bag (8) and the buffer air bag (714) expand, so that the air pressure in the metal expander (10) is equal to that in the breathing air bag (8), the buffer air bag (714) and the oil filter box. The air pressure in the box (721) is consistent, and the breathing airbag (8) expands in the oil storage box (61), thereby squeezing the oil in the oil storage box (61), so that the oil is delivered to the metal expander (10) through the oil delivery valve (62), thereby replenishing the oil; at the same time, the air pressure in the oil filter box (721) pushes the oil in the oil filter box (721) to flow back into the metal expander (10) through the oil return valve (9), so that the oil filtered by the oil-gas separation membrane (723) flows back into the metal expander (10); until the value read by the distance sensor (3) reaches a predetermined value; Step 5: Close the oil delivery valve (62) and the oil return valve (9), and open the closing valve (725), so that the gas passes through the oil-gas separation membrane (723) to filter the oil and then is discharged through the air outlet pipe (724); after the reading of the air pressure sensor (4) is within the normal range, close the first air release valve (711) and the closing valve (725); the timer is restarted and enters the low power consumption mode, waiting for the next trigger.

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