Automatic oil supply outdoor terminal

Abstract

The invention discloses an automatic oil supply outdoor terminal, and belongs to the technical field of oil-filled outdoor terminals. The automatic oil supply outdoor terminal comprises an oil-filled outdoor terminal and an oil supply device, a first monitoring unit for monitoring the liquid level of insulating oil in real time is arranged in the oil-filled outdoor terminal; the oil supply device comprises an oil storage container, a control unit and an oil supply pump, the control unit and the oil supply pump are arranged on the oil storage container, an inlet of the oil supply pump is connected with the interior of the oil storage container, an outlet of the oil supply pump is connected with the oil-filled outdoor terminal, and oil is supplied to the oil-filled outdoor terminal from the oil storage container. The first monitoring unit is in telecommunication connection with the control unit, the control unit is in telecommunication connection with the oil supply pump, the control unit is in telecommunication connection with an external upper computer, and the first monitoring unit converts monitored insulating oil low liquid level information into signals and transmits the signals to the control unit. And the control unit sends an instruction to the oil supply pump to supply oil to the oil-filled outdoor terminal according to the information monitored by the first monitoring unit.

Description

Technical Field

[0001] The invention relates to the technical field of oil-filled outdoor terminals, in particular to an automatic oil-supplying outdoor terminal. Background Art

[0002] With the continuous prosperity of my country's economy and society and the accelerated advancement of industrialization and urbanization, electricity, as a key pillar industry for the development of the national economy, is developing at an unprecedented speed. This trend is not only reflected in the expansion and upgrading of traditional power grids, but also more obviously in the large-scale construction and optimized layout of high-voltage and ultra-high-voltage power grids. With the continuous maturity and application of ultra-high voltage transmission technology, the transmission capacity and coverage of my country's power grid have been significantly enhanced, effectively solving the problem of long-distance and large-capacity power transmission, and providing solid power support for the balanced development of regional economy.

[0003] In this context, the continuous growth of electricity demand has become a key force in promoting technological innovation and industrial upgrading in the power industry. Especially in the construction of high-voltage and ultra-high-voltage power grids with voltage levels of 66kV and above, the technical requirements for power transmission equipment are getting higher and higher, which has promoted the progress of related materials and technologies. With the growth of demand for cross-linked polyethylene insulated power cables, the cable accessories industry has also ushered in new development opportunities. As an indispensable part of the cable system, the performance of cable accessories is directly related to the safety and reliability of the entire cable line. As the main cable accessories, the cable outdoor terminal is used to reliably connect the underground cable to the high-voltage transmission line on the high-voltage transmission tower. At present, the outdoor cable terminal products mainly include two types: fully prefabricated dry flexible outdoor terminals and oil-filled sleeve terminals, of which the latter is widely used as a traditional product. Its structure includes outlet clamps (copper terminals), insulating sleeves, filling liquid, upper and lower sealing flanges, outlet rods connected to the cable conductor, tail pipes, and grounding devices.

[0004] However, in actual operation, the oil-filled casing terminal faces a series of problems that need to be solved:

[0005] (1) During long-term operation, changes in ambient temperature will cause changes in the temperature of the insulating liquid filled inside, making it difficult to determine the liquid level of the internal insulating liquid.

[0006] (2) After long-term use, the lower flange seal may age, resulting in reduced sealing performance, which may cause leakage of the internal insulating liquid. The cable terminal may therefore be in a poor operating state, posing the risk of line failure or breakdown.

[0007] (3) During routine inspection and maintenance, it is difficult for operation and maintenance personnel to grasp the actual liquid level of the insulating liquid inside the cable terminal, and it is impossible to determine whether it needs to be replenished in time and how much needs to be replenished.

[0008] (4) For 500kV outdoor terminals, since they need to be installed on a bracket and the product itself is relatively long, the operation of pouring insulating liquid from top to bottom increases difficulty and risk.

[0009] In order to ensure good sealing, insulation and conductivity between cable accessories and cables, and thus guarantee long-term stable operation of cable lines, it is necessary to overcome the deficiencies of the prior art. Therefore, the applicant has designed an automatic oil supply outdoor terminal with reasonable structure and excellent sealing performance. Summary of the invention

[0010] The purpose of the present invention is to provide an automatic oil supply outdoor terminal to solve the technical problems mentioned in the above background technology.

[0011] The technical solution for achieving the purpose of the present invention is: an automatic oil supply outdoor terminal, including an oil-filled outdoor terminal and an oil supply device for supplying oil to the oil-filled outdoor terminal; a first monitoring unit for real-time monitoring of the insulating oil level is provided in the oil-filled outdoor terminal; the oil supply device includes an oil storage container, and a control unit and an oil supply pump arranged on the oil storage container, the inlet of the oil supply pump is connected to the interior of the oil storage container, and the outlet of the oil supply pump is connected to the oil-filled outdoor terminal, and oil is supplied from the oil storage container to the oil-filled outdoor terminal; the first monitoring unit is connected to the control unit by telecommunication, the control unit is connected to the oil supply pump by telecommunication, and the control unit is connected to an external host computer by telecommunication, the first monitoring unit converts the monitored insulating oil low level information into a signal and transmits it to the control unit, and the control unit issues an instruction to the oil supply pump to supply oil to the oil-filled outdoor terminal based on the information monitored by the first monitoring unit.

[0012] The automatic oil supply outdoor terminal provided by the present invention combines an oil-filled outdoor terminal with an oil supply device; in the device, a first monitoring unit is integrated inside the oil-filled outdoor terminal, and the oil supply device is equipped with a control unit and an oil supply pump; an electrical signal connection is established between the control unit, the first monitoring unit and the oil supply pump; the first monitoring unit can monitor the insulating oil level inside the oil-filled outdoor terminal in real time, and convert the detected low liquid level information into an electrical signal and send it to the control unit; the control unit sends an instruction to the oil supply pump based on the information transmitted by the first monitoring unit, thereby realizing automatic oil supply to the oil-filled outdoor terminal, ensuring that the insulating oil is replenished in time and the replenishment amount is accurately controlled.

[0013] Furthermore, the oil-filled outdoor terminal includes a stress cone and an insulating sleeve; the insulating sleeve is equiaxially sleeved on the outside of the stress cone, and the upper and lower ends of the insulating sleeve are respectively provided with upper and lower sealing flanges for sealing the insulating sleeve, and the upper end of the upper sealing flange is connected to a wire outlet clamp, and the inner circumferential surface of the insulating sleeve, the outer circumferential surface of the stress cone, the lower bottom surface of the upper sealing flange, and the upper bottom surface of the lower sealing flange form an insulating oil storage cavity for filling with insulating oil, and the first monitoring unit is arranged on the inner circumferential surface of the insulating sleeve below the required liquid level height of the insulating oil.

[0014] Furthermore, a rain cover is provided at the connection between the upper end of the upper sealing flange and the outlet clamp to protect the oil-filled outdoor terminal from rain.

[0015] Furthermore, the inlet of the oil supply pump is communicated with the interior of the oil storage container, and the outlet of the oil supply pump is communicated with the insulating oil storage chamber.

[0016] Furthermore, the outlet of the oil supply pump is connected to the insulating oil storage chamber by an oil pipeline, a first valve is provided at the connection between the oil pipeline and the insulating oil storage chamber, the first valve is connected to the control unit by telecommunication, and the control unit controls the switch of the first valve; a first valve is provided at the connection between the oil pipeline connecting the outlet of the oil supply pump and the insulating oil storage chamber and the insulating oil storage chamber, the first valve is connected to the control unit by telecommunication, and the control unit controls the switch of the first valve, so that not only the function of automatic oil supply is realized, but also good sealing of the insulating oil storage chamber can be ensured when no oil is supplied.

[0017] Furthermore, the oil supply device is also provided with an oil pump, the outlet of the oil pump is connected to the interior of the oil storage container, and the inlet of the oil pump is connected to the interior of the insulating oil storage chamber, so as to pump oil from the insulating oil storage chamber to the oil storage container; the control unit is electrically connected to the oil pump, and the first monitoring unit converts the monitored information of the insulating oil level being too high into a signal and transmits it to the control unit, and the control unit sends an instruction to the oil pump to pump oil from the insulating oil storage chamber to the oil storage container based on the information monitored by the first monitoring unit.

[0018] The oil supply device of the present invention is also equipped with an oil pump. The control unit is connected to the oil pump by telecommunication. The first monitoring unit converts the monitored information of the insulating oil level being too high into a signal and transmits it to the control unit. The control unit sends a command to the oil pump based on the information monitored by the first monitoring unit to pump oil from the insulating oil storage chamber into the oil storage container. This can ensure that the insulating oil level in the container is maintained at the required liquid level height and can accurately control the oil replenishment to prevent excessive oil.

[0019] Furthermore, the inlet of the oil pump is connected to the insulating oil storage chamber by an oil pipeline, a second valve is provided at the connection between the oil pipeline and the insulating oil storage chamber, the second valve is connected to the control unit by telecommunication, and the control unit controls the switch of the second valve; a second valve is provided at the connection between the oil pipeline connecting the inlet of the oil pump and the insulating oil storage chamber and the insulating oil storage chamber, the second valve is connected to the control unit by telecommunication, and the control unit controls the switch of the second valve, so that not only the function of automatic oil pumping is realized, but also the good sealing of the insulating oil storage chamber is ensured when the oil pumping operation is not performed.

[0020] Furthermore, a second monitoring unit for real-time monitoring of temperature and pressure is provided in the oil storage container. The second monitoring unit is telecommunication-connected to the control unit. The second monitoring unit converts abnormal pressure and temperature information in the monitored oil storage container into signals and transmits them to the control unit. The control unit receives the signals and sends signals of abnormal pressure and temperature to an external host computer.

[0021] A second monitoring unit is provided in the oil storage container of the present invention, and the second monitoring unit is connected to the control unit by telecommunication. The second monitoring unit converts the abnormal pressure and temperature information in the monitored oil storage container into signals and transmits them to the control unit. The control unit receives the signals and sends pressure and temperature abnormality signals to an external host computer, indicating that the pressure or temperature in the oil storage container is abnormal. In this way, potential problems can be discovered and handled in time to ensure the safe operation of the system.

[0022] Furthermore, the oil storage container is also provided with an alarm unit, which is electrically connected to the control unit. The second monitoring unit converts the abnormal pressure and temperature information in the monitored oil storage container into a signal and transmits it to the control unit. The control unit receives the signal and issues an instruction to the alarm unit, and the alarm unit receives the instruction and issues an alarm signal.

[0023] The oil storage container of the present invention is also provided with an alarm unit, which is connected to the control unit by telecommunication. The second monitoring unit converts the abnormal pressure and temperature information in the monitored oil storage container into a signal and transmits it to the control unit. After receiving the abnormal signal, the control unit sends an instruction to the alarm unit, triggering the alarm unit to send an alarm signal. This makes it convenient for the staff to inspect or replenish the oil storage container in time to ensure the normal operation of the system.

[0024] Furthermore, the oil storage container is provided with an oil filling port connected to the interior of the oil storage container for filling oil, and a third valve is provided on the oil filling port.

[0025] The oil storage container of the present invention is provided with an oil filling port for filling oil, and a third valve is provided on the oil filling port. By controlling the switch of the third valve, the valve can be opened for filling oil when insulating oil needs to be added, and remain closed at other times, thereby ensuring the sealing of the oil storage container and preventing oil leakage or external contaminants from entering.

[0026] Furthermore, a plurality of hoops are provided on the side wall of the oil storage container.

[0027] The oil storage container of the present invention is provided with a plurality of clamps on the side wall. The design of these clamps makes the installation of the oil storage container easier and more stable, ensuring that it can be securely installed in various environments, thereby improving the overall stability and safety of the equipment.

[0028] By adopting the above technical solution, the present invention has the following beneficial effects:

[0029] (1) The automatic oil supply outdoor terminal provided by the present invention combines an oil-filled outdoor terminal with an oil supply device; in the device, a first monitoring unit is integrated inside the oil-filled outdoor terminal, and the oil supply device is equipped with a control unit and an oil supply pump; an electrical signal connection is established between the control unit, the first monitoring unit and the oil supply pump; the first monitoring unit can monitor the insulating oil level inside the oil-filled outdoor terminal in real time, and convert the detected low liquid level information into an electrical signal and send it to the control unit; the control unit sends a command to the oil supply pump based on the information transmitted by the first monitoring unit, thereby realizing automatic oil supply to the oil-filled outdoor terminal, ensuring that the insulating oil is replenished in time and the replenishment amount is accurately controlled.

[0030] (2) The first monitoring unit of the present invention is arranged on the inner circumferential surface of the insulating sleeve at the required liquid level of the insulating oil, so that the first monitoring unit can monitor the liquid level of the insulating oil and ensure the accuracy of the monitoring data, thereby responding to the change of the insulating oil liquid level in a timely manner and ensuring the normal operation of the system.

[0031] (3) The present invention further provides a rain cover at the connection between the upper end of the upper sealing flange and the outlet clamp to shield the oil-filled outdoor terminal from rain, thereby improving the protection performance and reliability of the oil-filled outdoor terminal and ensuring stable operation even under adverse weather conditions.

[0032] (4) In the present invention, a first valve is provided at the connection between the oil pipeline connecting the outlet of the oil supply pump and the insulating oil storage chamber and the insulating oil storage chamber. The first valve is connected to the control unit by telecommunication, and the control unit controls the switch of the first valve. In this way, not only the function of automatic oil supply is realized, but also good sealing of the insulating oil storage chamber is ensured when no oil is supplied.

[0033] (5) The oil supply device of the present invention is also equipped with an oil pump. The control unit is connected to the oil pump by telecommunication. The first monitoring unit converts the detected information of excessive insulating oil level into a signal and transmits it to the control unit. The control unit sends a command to the oil pump based on the information detected by the first monitoring unit to pump oil from the insulating oil storage chamber into the oil storage container. This can ensure that the insulating oil level in the container is maintained at the required level and can accurately control the replenishment of oil to prevent excessive oil.

[0034] (6) In the present invention, a second valve is provided at the connection between the oil pipeline connecting the inlet of the oil pump and the insulating oil storage chamber and the insulating oil storage chamber. The second valve is connected to the control unit by telecommunication, and the control unit controls the switch of the second valve. This not only realizes the function of automatic oil extraction, but also ensures the good sealing of the insulating oil storage chamber when the oil extraction operation is not performed.

[0035] (7) A second monitoring unit is provided in the oil storage container of the present invention. The second monitoring unit is connected to the control unit by telecommunication. The second monitoring unit converts the abnormal pressure and temperature information in the monitored oil storage container into a signal and transmits it to the control unit. The control unit receives the signal and sends a pressure and temperature abnormality signal to an external host computer, indicating that the pressure or temperature in the oil storage container is abnormal. In this way, potential problems can be discovered and handled in a timely manner to ensure the safe operation of the system.

[0036] (8) The oil storage container of the present invention is also provided with an alarm unit, which is connected to the control unit by telecommunication. The second monitoring unit converts the abnormal pressure and temperature information in the oil storage container into a signal and transmits it to the control unit. After receiving the abnormal signal, the control unit sends a command to the alarm unit, triggering the alarm unit to send an alarm signal. This makes it convenient for the staff to inspect or replenish the oil storage container in time to ensure the normal operation of the system.

[0037] (9) The oil storage container of the present invention is provided with an oil filling port for filling oil, and a third valve is provided on the oil filling port. By controlling the switch of the third valve, the valve can be opened for filling oil when insulating oil needs to be added, and the valve can be kept closed at other times, thereby ensuring the sealing of the oil storage container and preventing oil leakage or external contaminants from entering.

[0038] (10) The oil storage container of the present invention is provided with a plurality of clamps on the side wall. The design of these clamps makes the installation of the oil storage container easier and more stable, ensuring that it can be securely installed in various environments, thereby improving the overall stability and safety of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments and in conjunction with the accompanying drawings, wherein

[0040] Figure 1 It is a control flow diagram of the automatic oil supply outdoor terminal of the present invention.

[0041] Figure 2 It is a structural schematic diagram of the automatic oil supply outdoor terminal oil-filled outdoor terminal of the present invention.

[0042] Figure 3 It is a structural schematic diagram of the automatic oil supply outdoor terminal oil supply device of the present invention.

[0043] Figure 4 It is a schematic diagram of the use status of the automatic oil supply outdoor terminal of the present invention.

[0044] The reference numerals in the accompanying drawings are: oil-filled outdoor terminal 1, first monitoring unit 1-1, insulating sleeve 1-3, upper sealing flange 1-4, lower sealing flange 1-5, outlet clamp 1-6, rain cover 1-7, insulating oil storage chamber 1-8, first valve 1-9, second valve 1-10, insulating oil specified liquid level height 1-11;

[0045] Oil supply device 2, oil storage container 2-1, control unit 2-2, oil supply pump 2-3, oil pump 2-4, second monitoring unit 2-5, alarm unit 2-6, oil filling port 2-7, oil supply port 2-8, oil supply pipeline 2-9, clamp 2-10, third valve 2-11;

[0046] Oil pipeline 3;

[0047] Electric tower 4, support 4-1, ladder 4-1-1, base plate 4-1-2, and drainage line 4-2. DETAILED DESCRIPTION

[0048] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0049] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0050] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0052] In the description of the embodiments of the present invention, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is conventionally placed when used, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0053] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The present invention is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the scope of protection of the present invention.

[0054] (Example)

[0055] See also Figures 1 to 3 , an automatic oil supply outdoor terminal of this embodiment includes an oil-filled outdoor terminal 1 and an oil supply device 2, the oil supply device 2 supplies oil to the oil-filled outdoor terminal 1;

[0056] The oil-filled outdoor terminal 1 includes a stress cone, an insulating sleeve 1-3, and a first monitoring unit 1-1; the insulating sleeve 1-3 is equiaxially sleeved on the outside of the stress cone, and the upper and lower ends of the insulating sleeve 1-3 are respectively provided with upper and lower sealing flanges 1-5 for sealing the insulating sleeve 1-3, and the upper end of the upper sealing flange 1-4 is connected to a lead-out clamp 1-6, and the inner circumference of the insulating sleeve 1-3, the outer circumference of the stress cone, the lower bottom surface of the upper sealing flange 1-4, and the upper bottom surface of the lower sealing flange 1-5 mutually form an insulating oil storage chamber 1-8 for filling with insulating oil, and the first monitoring unit 1-1 is arranged on the inner circumference of the insulating sleeve 1-3 below the specified liquid level 1-11 of the insulating oil; preferably, the first monitoring unit includes a liquid level sensor.

[0057] The oil supply device 2 includes an oil storage container 2-1, and a control unit 2-2, an oil supply pump 2-3, an oil pump 2-4, and a second monitoring unit 2-5 for real-time monitoring of temperature and pressure arranged on the oil storage container 2-1; the oil storage container 2-1 is provided with an oil filling port 2-7 and an oil supply port 2-8 connected to the interior of the oil storage container 2-1, the side wall of the oil storage container 2-1 is provided with a plurality of clamps 2-10, and the oil filling port 2-7 is provided with a third valve 2-11; the inlet of the oil supply pump 2-3 is connected to the interior of the oil storage container 2-1, the outlet of the oil supply pump 2-3 is connected to the oil supply port 2-8 through an oil supply pipeline 2-9, and the oil supply port 2-8 is connected to the insulating oil storage container 2-1 through an oil pipeline The insulating oil storage chamber 1-8 is connected to the oil storage chamber 1-8, and oil is supplied from the oil storage container 2-1 to the oil-filled outdoor terminal 1, wherein a first valve is provided at the connection between the oil pipeline connecting the outlet of the oil supply pump 2-3 and the insulating oil storage chamber 1-8 and the insulating oil storage chamber 1-8; the outlet of the oil pump 2-4 is connected to the interior of the oil storage chamber 2-1, and the inlet of the oil pump 2-4 is connected to the insulating oil storage chamber 1-8 through the oil pipeline, and oil is pumped from the insulating oil storage chamber 1-8 to the oil storage container 2-1, wherein a second valve is provided at the connection between the oil pipeline connecting the inlet of the oil pump 2-4 and the insulating oil storage chamber 1-8 and the insulating oil storage chamber 1-8; preferably, the second monitoring unit includes an oil pressure sensor.

[0058] The first monitoring unit 1-1 is connected to the control unit 2-2 by telecommunication, and the control unit 2-2 is connected to the oil supply pump 2-3 and the first valve by telecommunication. The control unit 2-2 is connected to the external host computer by telecommunication. The first monitoring unit 1-1 converts the monitored low insulating oil level information into a signal and transmits it to the control unit 2-2. The control unit 2-2 issues instructions to the first valve and the oil supply pump 2-3 according to the information monitored by the first monitoring unit 1-1, opens the first valve and supplies oil to the oil-filled outdoor terminal 1. The control unit 2-2 is connected to the oil pump 2-4 and the second valve by telecommunication. The first monitoring unit 1-1 converts the monitored high insulating oil level information into a signal and transmits it to the control unit 2-2. The control unit 2-2 issues instructions to the oil pump 2-4 and the second valve according to the information monitored by the first monitoring unit 1-1, opens the second valve and pumps oil from the insulating oil storage chamber 1-8 into the oil storage container 2-1.

[0059] In a further embodiment, an alarm unit 2-6 is further provided on the oil storage container 2-1, and the alarm unit 2-6 is telecommunication-connected to the control unit 2-2. The second monitoring unit 2-5 converts the abnormal pressure and temperature information in the monitored oil storage container 2-1 into a signal and transmits it to the control unit 2-2. The control unit 2-2 receives the signal and issues an instruction to the alarm unit 2-6, and the alarm unit 2-6 receives the instruction and issues an alarm signal.

[0060] In a further embodiment, a rain cover 1-7 is further provided at the connection between the upper end of the upper sealing flange 1-4 and the outlet clamp 1-6, for protecting the oil-filled outdoor terminal 1 from rain.

[0061] In order to facilitate the understanding of the solution of this embodiment, the installation method and operation process of the automatic oil supply outdoor terminal of the present invention are as follows:

[0062] See also Figure 4 The oil-filled outdoor terminal 1 is fixedly mounted on the bottom plate 4-1-2 of the electric tower 4 through the lower sealing flange, the outlet clamp is connected to the electric tower 4 through the drainage line 4-2, and the oil supply device 2 is fixedly mounted on the straight ladder 4-1-1 of the electric tower 4 through the clamp 2-10.

[0063] When the oil level of the oil-filled outdoor terminal is higher than the specified liquid level of the insulating oil, the pressure sensor monitors the pressure increase in real time, converts the monitored information into a signal and transmits it to the control unit. The control unit receives the signal and sends a command to the second valve and the oil pump. The second valve receives the command and opens the valve and the oil pump operates to pump the excess oil into the oil storage container. When the pressure sensor monitors the pressure in real time and returns to the specified liquid level, it converts the monitored information into a signal and transmits it to the control unit. The control unit receives the signal and sends a command to the second valve and the oil pump to close the oil pump and the second valve.

[0064] When the oil level of the oil-filled outdoor terminal is lower than the specified liquid level of the insulating oil, the pressure sensor monitors the pressure reduction in real time, converts the monitored information into a signal and transmits it to the control unit. The control unit receives the signal and sends a command to the first valve and the oil pump. The first valve receives the command and opens the valve to operate the oil pump to pump the excess oil into the oil storage container. When the pressure sensor monitors the pressure in real time and returns to the specified liquid level, it converts the monitored information into a signal and transmits it to the control unit. The control unit receives the signal and sends a command to the first valve and the oil pump to close the oil pump and the first valve.

[0065] When the monitoring unit detects that the oil pressure in the oil storage container is low or the temperature is abnormal, the monitoring unit converts the monitored information into a signal and transmits it to the control unit. The control unit receives the signal and sends a signal of low oil pressure or abnormal temperature to the host computer.

[0066] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic oil supply outdoor terminal, characterized in that: It includes an oil-filled outdoor terminal and an oil supply device for supplying oil to the oil-filled outdoor terminal; the oil-filled outdoor terminal is provided with a first monitoring unit for real-time monitoring of the insulating oil level; the oil supply device includes an oil storage container, a control unit and an oil supply pump arranged on the oil storage container, the inlet of the oil supply pump is connected to the interior of the oil storage container, and the outlet of the oil supply pump is connected to the oil-filled outdoor terminal, and oil is supplied from the oil storage container to the oil-filled outdoor terminal; the first monitoring unit is connected to the control unit by telecommunication, the control unit is connected to the oil supply pump by telecommunication, and the control unit is connected to an external host computer by telecommunication, the first monitoring unit converts the monitored insulating oil low level information into a signal and transmits it to the control unit, and the control unit issues an instruction to the oil supply pump to supply oil to the oil-filled outdoor terminal according to the information monitored by the first monitoring unit.

2. The automatic oil supply outdoor terminal according to claim 1, characterized in that: The oil-filled outdoor terminal includes a stress cone and an insulating sleeve; the insulating sleeve is sleeved on the outside of the stress cone at an equiaxial spacing, and the upper and lower ends of the insulating sleeve are respectively provided with upper and lower sealing flanges for sealing the insulating sleeve, and the upper end of the upper sealing flange is connected to a wire outlet clamp, and the inner circumferential surface of the insulating sleeve, the outer circumferential surface of the stress cone, the lower bottom surface of the upper sealing flange, and the upper bottom surface of the lower sealing flange mutually form an insulating oil storage cavity for filling with insulating oil, and the first monitoring unit is arranged on the inner circumferential surface of the insulating sleeve below the required liquid level height of the insulating oil.

3. The automatic oil supply outdoor terminal according to claim 2, characterized in that: The inlet of the oil supply pump is communicated with the interior of the oil storage container, and the outlet of the oil supply pump is communicated with the insulating oil storage chamber.

4. The automatic oil supply outdoor terminal according to claim 3, characterized in that: The outlet of the oil supply pump is connected to the insulating oil storage chamber by an oil pipeline. A first valve is provided at the connection between the oil pipeline and the insulating oil storage chamber. The first valve is electrically connected to the control unit, and the control unit controls the switch of the first valve.

5. The automatic oil supply outdoor terminal according to claim 2, characterized in that: The oil supply device is also provided with an oil pump, the outlet of the oil pump is connected to the interior of the oil storage container, and the inlet of the oil pump is connected to the interior of the insulating oil storage chamber, so as to pump oil from the insulating oil storage chamber to the oil storage container; the control unit is connected to the oil pump by telecommunication, and the first monitoring unit converts the monitored information of the insulating oil level being too high into a signal and transmits it to the control unit, and the control unit sends an instruction to the oil pump based on the information monitored by the first monitoring unit to pump oil from the insulating oil storage chamber to the oil storage container.

6. The automatic oil supply outdoor terminal according to claim 5, characterized in that: The inlet of the oil pump is connected to the insulating oil storage chamber by an oil pipeline. A second valve is provided at the connection between the oil pipeline and the insulating oil storage chamber. The second valve is electrically connected to the control unit, and the control unit controls the switch of the second valve.

7. The automatic oil supply outdoor terminal according to claim 1, characterized in that: The oil storage container is provided with a second monitoring unit for real-time monitoring of temperature and pressure. The second monitoring unit is connected to the control unit by telecommunication. The second monitoring unit converts abnormal pressure and temperature information in the oil storage container into signals and transmits them to the control unit. The control unit receives the signals and sends pressure and temperature abnormality signals to an external host computer.

8. The automatic oil supply outdoor terminal according to claim 7, characterized in that: The oil storage container is also provided with an alarm unit, which is connected to the control unit by telecommunication. The second monitoring unit converts the abnormal pressure and temperature information in the monitored oil storage container into a signal and transmits it to the control unit. The control unit receives the signal and issues an instruction to the alarm unit, and the alarm unit receives the instruction and issues an alarm signal.

9. The automatic oil supply outdoor terminal according to claim 1, characterized in that: The oil storage container is provided with an oil filling port which is communicated with the inside of the oil storage container and is used for filling oil. The oil filling port is provided with a third valve.

10. The automatic oil supply outdoor terminal according to claim 1, characterized in that: A plurality of hoops are arranged on the side wall of the oil storage container.

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