Intelligent oil discharge system for box transformer substation foundation

Abstract

The invention provides a box-type transformer substation foundation intelligent oil discharge system, and relates to the technical field of box-type transformer substations, the box-type transformer substation foundation intelligent oil discharge system comprises a concrete foundation, the upper side and the lower side of the concrete foundation are fixedly provided with a box-type transformer substation body and an oil storage tank respectively, and the box-type transformer substation body and the oil storage tank are communicated through an oil conveying pipeline; through the lifting motion of the floating ball, the first pushing piston and the second pushing piston synchronously perform telescopic motion; the air outlet pipeline and the lower portion of the exhaust pipe are located on the same straight connecting line, and air in the air storage tank is pumped out through the exhaust pipe so as to conduct anti-blocking cleaning on the interior of the exhaust pipe. By improving the structure in the oil storage tank, the risks of oil deterioration and turbidity are greatly reduced, the service life of oil is effectively prolonged, meanwhile, the principle of thermal expansion and cold contraction of oil is used as power to pump air into the air storage tank and release the air into the exhaust pipe, the exhaust pipe is effectively prevented from being blocked, and the service life of the oil storage tank is prolonged. And rapid pressure relief of the box transformer device in an emergency state is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of box-type substations, and in particular to an intelligent oil drainage system for box-type substation foundations. Background Art

[0002] The prior art discloses a fire extinguishing and oil recovery device for an oil-immersed transformer or oil storage tank with a publication number of "CN109859926A". It includes a transformer body oil tank, a transformer oil storage cabinet is provided on one side of the upper end of the transformer body oil tank through an oil replenishment on-off structure, a transformer oil drain port is provided on the other side of the upper end of the transformer body oil tank, the transformer oil drain port is connected to an oil drain pipeline, the oil drain pipeline is connected to a connecting pipe through an oil drain mechanism, an observation window and an oil leakage feedback device are provided on the connecting pipe, the connecting pipe is connected to an oil collecting tank, an oil collecting chamber is provided in the oil collecting tank, an oil level gauge is provided on the outer side of the oil collecting tank, the connecting pipe is connected to the oil collecting chamber, an oil drain valve is provided at the lower end of the oil collecting tank, an exhaust pipe is provided at the upper end of the oil collecting tank, and a one-way valve is provided on the exhaust pipe. The device adds a special oil collecting tank to realize the function of drain oil recovery, is convenient for construction, protects the environment, and greatly reduces the recovery and cleaning costs after fire fighting.

[0003] However, the above-mentioned device still has obvious defects during use: the above-mentioned device adopts an oil storage tank structure that is more common in the prior art. In order to ensure that the oil storage tank can quickly relieve pressure under overpressure, an exhaust pipe is usually arranged on the upper part of the oil storage tank. However, the exhaust pipe of the prior art is usually directly connected to the inside of the oil storage tank. There are many unreasonable aspects in this design. For example, the gas and dust in the external environment directly contact the oil in the oil storage tank, which may cause the risk of oil oxidation and increased impurities, and the exhaust pipe is usually not regularly cleared and maintained. Since the exhaust pipe is used less frequently, the exhaust pipe may be clogged and solidified with particles when it is idle for a long time in a dusty environment, so that when the internal pressure of the box transformer increases, the exhaust cannot be quickly exhausted to the outside, which may cause catastrophic production accidents. Summary of the invention

[0004] The purpose of the present invention is to provide an intelligent oil drainage system for a box-type transformer foundation to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An intelligent oil discharge system for a box transformer foundation comprises a concrete foundation, wherein a box transformer body and an oil storage tank are fixedly installed on the upper and lower sides of the concrete foundation respectively, the box transformer body and the oil storage tank are connected through an oil pipeline, an L-shaped partition is fixedly installed in the oil storage tank, the L-shaped partition divides the oil storage tank into an oil storage area and a gas storage area, a floating ball is arranged in the oil storage area, the floating ball rises and falls synchronously with the rise and fall of the liquid level in the oil storage area, a first connecting rod and a second connecting rod are respectively hingedly installed on both sides of the floating ball, the first connecting rod is fixedly rotatably installed on a connecting rod frame at one end away from the floating ball, and the second connecting rod is fixedly rotatably installed on a connecting rod frame at one end away from the floating ball, and the second connecting rod is fixedly rotatably installed on a connecting rod frame at one end away from the floating ball. The end away from the float is movably mounted on the first push piston through a rotating shaft, the first push piston is telescopically slidably arranged in the first sliding cylinder, the first sliding cylinder is fixedly installed above the oil storage tank, the first push piston is also fixedly connected to the second push piston on the side away from the second connecting rod, the second push piston is telescopically slidably arranged in the second sliding cylinder, the second sliding cylinder is fixedly installed in the first sliding cylinder, the second sliding cylinder is also connected to the air storage tank through a one-way air intake pipe, the air storage tank is fixedly installed in the air storage area, and the first push piston and the second push piston are synchronously telescopically moved through the lifting and lowering movement of the float;

[0007] An exhaust pipe is also connected to the oil storage tank above the first push piston. The first push piston seals and blocks the connection position between the exhaust pipe and the oil storage tank during the normal extension and contraction process, so that the oil storage area and the exhaust pipe are not connected to each other. When the pressure in the box transformer body or the oil storage tank increases abnormally, the first push piston slides toward the side close to the second sliding cylinder during the increase of the internal air pressure and releases the seal on the connection position between the exhaust pipe and the oil storage tank. At this time, the oil storage tank is connected to the exhaust pipe to release the pressure to the external environment.

[0008] The second pushing piston pumps gas into the gas tank in a unidirectional manner during the reciprocating extension and contraction process. The gas outlet end of the gas tank is connected to the spring-loaded pressure reducing valve arranged in the L-shaped partition. The spring-loaded pressure reducing valve cooperates with the matching airway opened in the first pushing piston through the gas outlet pipeline arranged in the L-shaped partition. The spring-loaded pressure reducing valve opens after the air pressure in the gas tank reaches a threshold value so that the gas outlet pipeline is connected to the gas tank. The gas outlet pipeline is on the same straight line as the lower part of the exhaust pipe. When the first pushing piston slides translationally so that the upper and lower sides of the matching airway are connected to the exhaust pipe and the gas outlet pipeline respectively, the gas in the gas tank is pumped out through the exhaust pipe to prevent blockage and clean the exhaust pipe.

[0009] Preferably, the oil pipeline connecting the box transformer body and the oil storage tank includes an oil inlet pipe and an oil outlet pipe, and an oil pump is also installed on the oil inlet pipe. The oil is pumped into the box transformer body by the oil pump, and the excess oil in the box transformer body is returned to the oil storage tank through the oil outlet pipe to form an oil circulation.

[0010] Preferably, heat dissipation fins are also installed on the path of the oil outlet pipe, and the heat dissipation fins are fixedly installed on a concrete foundation.

[0011] Preferably, a flange port is installed on the outside of the oil storage tank on one side of the oil storage area, and an inspection port is opened on the oil storage tank on the side of the gas storage area. An inspection door is installed at the inspection port through a hinge.

[0012] Preferably, a limit pin is also installed in a lifting manner on the L-shaped partition, a spring seat is fixedly installed at the bottom of the limit pin, and limit springs are installed on both sides of the spring seat. The limit spring is connected to the L-shaped partition at one end away from the spring seat, and a pin hole that cooperates with the limit pin is correspondingly opened on the first push piston. When the pressure in the box transformer body or the oil storage tank increases abnormally, the first push piston slides toward the side close to the second sliding cylinder during the increase of the internal air pressure and makes the limit pin cooperate with the pin hole. At this time, the first push piston is limited so that the oil storage tank and the exhaust pipe remain connected.

[0013] Preferably, the spring-type pressure reducing valve includes a valve body, a sliding valve core and an extrusion spring. The upper side of the sliding valve core is connected to the valve body through the extrusion spring. A pressure relief guide groove is also provided on the side of the valve body. When the pressure in the gas storage tank increases, the sliding valve core is pushed to move upward. When the sliding valve core moves to the pressure relief guide groove, the upper and lower sides of the valve body are in a connected state. At this time, the gas in the gas storage tank enters the gas outlet pipeline upward and is discharged through the exhaust pipe.

[0014] Preferably, a damping rod is also installed at the bottom of the spring-type pressure reducing valve, and the telescopic end of the damping rod is fixedly connected to the bottom of the sliding valve core, and the damping rod is used to slow down the descending speed of the sliding valve core.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention improves the structure inside the oil storage tank so that the exhaust pipe is in a closed state with the oil storage area under normal conditions, thereby isolating the internal oil from the external environment, greatly reducing the risk of oil deterioration and turbidity, and effectively extending the service life of the oil. At the same time, the thermal expansion and contraction principle of the oil is used as a power to pump air into the air storage tank and release it into the exhaust pipe, effectively preventing the exhaust pipe from being blocked and ensuring rapid pressure relief of the box-type transformer in an emergency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a schematic cross-sectional view of the internal structure of the oil storage tank of the present invention;

[0019] Figure 3 Attached to the instruction manual Figure 2 A schematic diagram of the enlarged structure of the middle A area;

[0020] Figure 4 It is a schematic diagram of the expansion and contraction process of the first push piston of the present invention;

[0021] Figure 5 It is a schematic diagram of the gas outflow state after the sliding valve core of the present invention enters the pressure relief guide groove.

[0022] In the figure: 1 concrete foundation, 2 box transformer body, 3 oil storage tank, 4 L-type partition, 5 oil storage area, 6 gas storage area, 7 float, 8 first connecting rod, 9 second connecting rod, 10 connecting rod frame, 11 first push piston, 12 first sliding cylinder, 13 second push piston, 14 second sliding cylinder, 15 gas storage tank, 16 spring type pressure reducing valve, 17 air outlet pipeline, 18 matching air channel, 19 exhaust pipe, 20 oil inlet pipe, 21 oil outlet pipe, 22 oil pump, 23 cooling fin, 24 flange mouth, 25 inspection door, 26 limit latch, 27 spring seat, 28 limit spring, 29 latch hole, 30 valve body, 31 sliding valve core, 32 extrusion spring, 33 pressure relief guide groove, 34 damping rod. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0024] See also Figure 1-5 , the present invention provides a technical solution:

[0025] Embodiment 1:

[0026] An intelligent oil discharge system for a box-type transformer foundation comprises a concrete foundation 1, wherein a box-type transformer body 2 and an oil storage tank 3 are fixedly installed on the upper and lower sides of the concrete foundation 1, respectively. The box-type transformer body 2 and the oil storage tank 3 are connected through an oil pipeline, and an L-shaped partition 4 is fixedly installed in the oil storage tank 3, and the L-shaped partition 4 divides the oil storage tank 3 into an oil storage area 5 and a gas storage area 6. A floating ball 7 is arranged in the oil storage area 5, and the floating ball 7 rises and falls synchronously with the rise and fall of the liquid level in the oil storage area 5. A first connecting rod 8 and a second connecting rod 9 are respectively hingedly installed on both sides of the floating ball 7, and the first connecting rod 8 is fixedly rotatably installed on a connecting rod frame 10 at one end away from the floating ball 7, and the second connecting rod 9 is fixedly rotatably installed at one end away from the floating ball 7. The first push piston 11 is movably mounted on the first push piston 11 through a rotating shaft, the first push piston 11 is telescopically slidably arranged in the first slide cylinder 12, the first slide cylinder 12 is fixedly mounted above the oil storage tank 3, the first push piston 11 is also fixedly connected to the second push piston 13 on the side away from the second connecting rod 9, the second push piston 13 is telescopically slidably arranged in the second slide cylinder 14, the second slide cylinder 14 is fixedly mounted in the first slide cylinder 12, the second slide cylinder 14 is also connected to the air storage tank 15 through a one-way air intake pipe, the air storage tank 15 is fixedly mounted in the air storage area 6, and the first push piston 11 and the second push piston 13 are synchronously telescopically moved through the lifting and lowering movement of the float 7;

[0027] An exhaust pipe 19 is also connected to the oil storage tank 3 above the first push piston 11. The first push piston 11 blocks the connection position between the exhaust pipe 19 and the oil storage tank 3 during the normal extension and contraction process, so that the oil storage area 5 and the exhaust pipe 19 are not connected to each other. When the pressure in the box transformer body 2 or the oil storage tank 3 increases abnormally, the first push piston 11 slides toward the side close to the second slide cylinder 14 during the increase of the internal air pressure and releases the blockage of the connection position between the exhaust pipe 19 and the oil storage tank 3. At this time, the oil storage tank 3 is connected to the exhaust pipe 19 to release the pressure to the external environment.

[0028] The second push piston 13 pumps gas into the gas tank 15 in a unidirectional manner during the reciprocating expansion and contraction process. The gas outlet end of the gas tank 15 is connected to the spring-loaded pressure reducing valve 16 arranged in the L-shaped partition 4. The spring-loaded pressure reducing valve 16 cooperates with the matching air channel 18 opened in the first push piston 11 through the gas outlet pipeline 17 arranged in the L-shaped partition 4. The spring-loaded pressure reducing valve 16 opens after the air pressure in the gas tank 15 reaches a threshold value, so that the gas outlet pipeline 17 is connected to the gas tank 15. The gas outlet pipeline 17 and the exhaust pipe 19 are on the same straight line below. When the first push piston 11 slides horizontally so that the upper and lower sides of the matching air channel 18 are connected to the exhaust pipe 19 and the gas outlet pipeline 17 respectively, the gas in the gas tank 15 is pumped out through the exhaust pipe 19, thereby preventing the exhaust pipe 19 from being blocked and cleaning.

[0029] In this embodiment, the concrete foundation 1 serves as the main frame structure of the device, the box transformer body 2 and the oil storage tank 3 are fixedly installed on the upper and lower sides of the concrete foundation 1, and the box transformer body 2 and the oil storage tank 3 are connected through an oil pipeline. Furthermore, the oil pipeline connecting the box transformer body 2 and the oil storage tank 3 includes an oil inlet pipe 20 and an oil outlet pipe 21. The oil inlet pipe 20 is also equipped with an oil pump 22, and the oil is pumped into the box transformer body 2 by the oil pump 22. The excess oil in the box transformer body 2 is returned to the oil storage tank 3 through the oil outlet pipe 21 to form an oil circulation. A heat dissipation fin 23 is also installed on the path of the oil outlet pipe 21, and the heat dissipation fin 23 is fixedly installed on the concrete foundation 1. An L-shaped partition 4 is also fixedly installed in the oil storage tank 3, and the L-shaped partition 4 The oil tank 3 is divided into an oil storage area 5 and an air storage area 6. A float 7 is provided in the oil storage area 5. The float 7 moves up and down synchronously with the rise and fall of the liquid level in the oil storage area 5. The change of the liquid level in the oil storage area 5 is realized during the thermal expansion and contraction of the internal oil. The oil pump 22 works intermittently to pump the oil into the box transformer body 2. Since the oil temperature in the box transformer body 2 is higher than the oil temperature in the oil storage area 5, during the intermittent working process of the oil pump 22, the high-temperature oil in the box transformer body 2 enters the oil storage area 5, thereby increasing the overall temperature of the oil in the oil storage area 5. At this time, the oil expands due to the influence of thermal expansion and contraction. During the expansion process, the oil rises and pushes the float 7 up. The float 7 rises, thereby pushing the first push piston 11 to move in the first sliding cylinder 12. Translational sliding, in the interval when the oil pump 22 stops working, the temperature of the oil in the oil storage area 5 gradually decreases. At this time, the oil causes the liquid level to drop during the process of thermal expansion and contraction. At this time, the float 7 drops, so that the first push piston 11 completes a telescopic cycle. At the same time, the movement of the first push piston 11 synchronously drives the second push piston 13 to move. The second push piston 13 moves in the second sliding cylinder 14, so that the gas is pumped into the gas tank 15 in one direction. This one-way air intake pipeline is more common in life and industry. Its principle is similar to the air pump structure in life. The second push piston 13 supplies air to the gas tank 15 during the reciprocating cycle, thereby increasing the air pressure in the gas tank 15. When the air pressure reaches the threshold of the spring-loaded pressure reducing valve 16, the spring-loaded pressure reducing valve 16 is When the valve 16 is opened, the high-pressure gas in the gas tank 15 flows upward through the gas outlet pipe 17. A matching gas passage 18 is also provided in the first push piston 11. When the first push piston 11 moves so that the upper and lower ends of the matching gas passage 18 are connected to the exhaust pipe 19 and the gas outlet pipe 17 respectively, the gas in the gas tank 15 is pumped out through the exhaust pipe 19 to prevent the exhaust pipe 19 from being blocked and cleaned. The purpose of this setting is to inflate the gas tank 15 through the principle of thermal expansion and contraction of the oil itself, and release the gas pressure in the gas tank 15 to the outside after reaching the threshold, so as to dredge the exhaust pipe 19 irregularly to ensure that there is no solidification blockage inside, thereby ensuring that the exhaust pipe 19 can quickly relieve the pressure inside the oil storage tank 3 in an emergency. In addition,The oil storage tank 3 above the first push piston 11 is also connected to an exhaust pipe 19. The first push piston 11 blocks the connection between the exhaust pipe 19 and the oil storage tank 3 during the normal extension process, so that the oil storage area 5 and the exhaust pipe 19 are not connected to each other.

[0030] Embodiment 2:

[0031] A flange port 24 is also connected to the oil storage tank 3 on the oil storage area 5 side, and an inspection port is also provided on the oil storage tank 3 on the gas storage area 6 side, and an inspection door 25 is also installed at the inspection port through a hinge.

[0032] In this embodiment, the oil storage tank 3 is connected to the flange port 24, and the flange port 24 is used for adding and discharging the oil inside the oil storage area 5, as well as for routine maintenance operations by maintenance personnel.

[0033] Embodiment three:

[0034] A limit latch 26 is also installed in a lifting manner on the L-shaped partition 4, and a spring seat 27 is fixedly installed at the bottom of the limit latch 26. Limit springs 28 are installed on both sides of the spring seat 27. The limit spring 28 is connected to the L-shaped partition 4 at one end away from the spring seat 27. A latch hole 29 that cooperates with the limit latch 26 is correspondingly opened on the first push piston 11. When the pressure in the box-type transformer body 2 or the oil storage tank 3 increases abnormally, the first push piston 11 slides toward the side close to the second slide cylinder 14 during the increase of the internal air pressure and makes the limit latch 26 cooperate with the latch hole 29. At this time, the first push piston 11 is limited so that the oil storage tank 3 and the exhaust pipe 19 remain in a connected state.

[0035] In this embodiment, a limiting mechanism of the first push piston 11 is further disclosed. The first push piston 11 slides toward the side close to the second sliding cylinder 14 during the increase of the internal air pressure and makes the limiting latch 26 cooperate with the latch hole 29. At this time, the first push piston 11 is limited so that the oil storage tank 3 and the exhaust pipe 19 remain in a connected state. The significance of such a setting is that when the internal pressure of the gas storage tank 15 increases abnormally, the limiting latch 26 of the first push piston 11 cooperates with the latch hole 29, so that the oil storage tank 3 and the exhaust pipe 19 can remain in a connected state, thereby ensuring the smooth discharge of gas. It should be emphasized that the expansion coefficient of the oil can be determined. Therefore, by reasonably setting the length of the first push piston 11, its lateral telescopic displacement during daily use can maintain the closed and blocked state of the oil storage tank 3 and the exhaust pipe 19. When the internal pressure of the gas storage tank 15 increases abnormally, the displacement length of the first push piston 11 can make the limiting latch 26 cooperate with the latch hole 29, thereby smoothly realizing the conduction or closure of the oil storage tank 3 and the exhaust pipe 19.

[0036] Embodiment 4:

[0037] The spring-type pressure reducing valve 16 includes a valve body 30, a sliding valve core 31 and an extrusion spring 32. The sliding valve core 31 is connected to the valve body 30 through the extrusion spring 32. A pressure relief guide groove 33 is also provided on the side of the valve body 30. When the pressure in the gas storage tank 15 increases, the sliding valve core 31 is pushed to move upward. When the sliding valve core 31 moves to the pressure relief guide groove 33, the upper and lower sides of the valve body 30 are in a connected state. At this time, the gas in the gas storage tank 15 enters the gas outlet pipeline 17 upward and is discharged through the exhaust pipe 19.

[0038] A damping rod 34 is also installed at the bottom of the spring-type pressure reducing valve 16 . The telescopic end of the damping rod 34 is fixedly connected to the bottom of the sliding valve core 31 . The damping rod 34 is used to slow down the descending speed of the sliding valve core 31 .

[0039] In this embodiment, the specific structure of the spring-type pressure reducing valve 16 is further disclosed, which is composed of a valve body 30, a sliding valve core 31 and an extrusion spring 32. The extrusion spring 32 ensures the closed state by squeezing the sliding valve core 31. When the pressure in the gas storage tank 15 increases, the sliding valve core 31 is pushed to move upward. When the sliding valve core 31 moves to the pressure relief guide groove 33, the upper and lower sides of the valve body 30 are in a connected state, and the gas enters the gas outlet pipe 17 upward. At the same time, a damping rod 34 is also installed at the bottom of the spring-type pressure reducing valve 16 to prevent the sliding valve core 31 from being closed under the push of the extrusion spring 32 after a small amount of gas flows out. The setting of the damping rod 34 can ensure the time for the sliding valve core 31 to move downward, so that the high-pressure gas in the gas storage tank 15 can be quickly and fully released outward, thereby having an airflow impact on the exhaust pipe 19.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent oil drainage system for a box-type transformer foundation, comprising a concrete foundation, wherein a box-type transformer body and an oil storage tank are fixedly mounted on the upper and lower sides of the concrete foundation, respectively, and the box-type transformer body and the oil storage tank are connected through an oil pipeline, and characterized in that: An L-shaped partition is also fixedly installed in the oil storage tank, and the L-shaped partition divides the oil storage tank into an oil storage area and an air storage area. A float is arranged in the oil storage area, and the float moves up and down synchronously with the rise and fall of the liquid level in the oil storage area. A first connecting rod and a second connecting rod are hingedly installed on both sides of the float, respectively. The first connecting rod is fixedly rotatably installed on the connecting rod frame at one end away from the float, and the second connecting rod is movably installed on the first push piston at one end away from the float through a rotating shaft. The first push piston is telescopically and slidably arranged in the first sliding cylinder, and the first sliding cylinder is fixedly installed above the oil storage tank. The first push piston is also fixedly connected to a second push piston at a side away from the second connecting rod. The second push piston is telescopically and slidably arranged in the second sliding cylinder, and the second sliding cylinder is fixedly installed in the first sliding cylinder. The second sliding cylinder is also connected to the air storage tank through a one-way air intake pipe. The air storage tank is fixedly installed in the air storage area, and the first push piston and the second push piston are synchronously telescopically and slidably moved through the lifting and lowering movement of the float. An exhaust pipe is also connected to the oil storage tank above the first push piston. The first push piston seals and blocks the connection position between the exhaust pipe and the oil storage tank during the normal extension and contraction process, so that the oil storage area and the exhaust pipe are not connected to each other. When the pressure in the box transformer body or the oil storage tank increases abnormally, the first push piston slides toward the side close to the second sliding cylinder during the increase of the internal air pressure and releases the seal on the connection position between the exhaust pipe and the oil storage tank. At this time, the oil storage tank is connected to the exhaust pipe to release the pressure to the external environment. The second pushing piston pumps gas into the gas tank in a unidirectional manner during the reciprocating extension and contraction process. The gas outlet end of the gas tank is connected to the spring-loaded pressure reducing valve arranged in the L-shaped partition. The spring-loaded pressure reducing valve cooperates with the matching airway opened in the first pushing piston through the gas outlet pipeline arranged in the L-shaped partition. The spring-loaded pressure reducing valve opens after the air pressure in the gas tank reaches a threshold value so that the gas outlet pipeline is connected to the gas tank. The gas outlet pipeline is on the same straight line as the lower part of the exhaust pipe. When the first pushing piston slides translationally so that the upper and lower sides of the matching airway are connected to the exhaust pipe and the gas outlet pipeline respectively, the gas in the gas tank is pumped out through the exhaust pipe to prevent blockage and clean the exhaust pipe.

2. According to claim 1, the intelligent oil drainage system for box-type transformer foundation is characterized by: The oil pipeline connecting the transformer body and the oil storage tank includes an oil inlet pipe and an oil outlet pipe. The oil inlet pipe is also equipped with an oil pump, which pumps the oil into the transformer body. The excess oil in the transformer body is returned to the oil storage tank through the oil outlet pipe, thus forming an oil circulation.

3. According to claim 2, the intelligent oil drainage system for box-type transformer foundation is characterized by: A heat dissipation fin is also installed on the path of the oil outlet pipe, and the heat dissipation fin is fixedly installed on the concrete foundation.

4. The intelligent oil drainage system for box-type transformer foundation according to claim 1 or 3 is characterized in that: A flange port is also connectedly installed on the outside of the oil storage tank on one side of the oil storage area, and an inspection port is also opened on the oil storage tank on one side of the gas storage area, and an inspection door is also installed at the inspection port through a hinge.

5. The intelligent oil drainage system for box-type transformer foundation according to claim 4 is characterized by: A limit pin is also installed in a lifting manner on the L-shaped partition, and a spring seat is fixedly installed at the bottom of the limit pin. Limit springs are installed on both sides of the spring seat. The limit spring is connected to the L-shaped partition at one end away from the spring seat. A pin hole that cooperates with the limit pin is correspondingly opened on the first push piston. When the pressure in the box transformer body or the oil storage tank increases abnormally, the first push piston slides toward the side close to the second sliding cylinder during the increase of the internal air pressure and makes the limit pin cooperate with the pin hole. At this time, the first push piston is limited so that the oil storage tank and the exhaust pipe remain connected.

6. The intelligent oil drainage system for box-type transformer foundation according to claim 5 is characterized by: The spring-type pressure reducing valve includes a valve body, a sliding valve core and an extrusion spring. The upper side of the sliding valve core is connected to the valve body through the extrusion spring. A pressure relief guide groove is also provided on the side of the valve body. When the pressure in the gas storage tank increases, the sliding valve core is pushed to move upward. When the sliding valve core moves to the pressure relief guide groove, the upper and lower sides of the valve body are in a connected state. At this time, the gas in the gas storage tank enters the gas outlet pipeline upward and is discharged through the exhaust pipe.

7. The intelligent oil drainage system for box-type transformer foundation according to claim 6 is characterized by: A damping rod is also installed at the bottom of the spring pressure reducing valve, and the telescopic end of the damping rod is fixedly connected to the bottom of the sliding valve core. The damping rod is used to slow down the descending speed of the sliding valve core.

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