Distribution-based traction transformer oil injection and exhaust system

Abstract

The utility model provides a traction transformer oil injection and exhaust system based on distributed oil injection and exhaust. The traction transformer oil injection and exhaust system comprises a traction transformer, an oil cooler, an oil pump, an oil inlet pipe and an oil return pipe. The traction transformer and the oil cooler are connected in series through an oil inlet pipe and an oil return pipe, and insulating oil in the traction transformer is pumped into the traction transformer from the oil cooler through an oil pump on the oil inlet pipe and then returns to the oil cooler through the oil return pipe for circulating cooling; a box cover quick connector is arranged on the upper portion of the traction transformer, oil is injected into the traction transformer through the box cover quick connector, a balance pipe is arranged on the box cover quick connector of the traction transformer and connected to an external oil conservator, and a detachable pressurizing air pump and a respirator are arranged on the oil conservator. An oil cooler exhaust port is formed in the top of the cooler, and a detachable oil cooler exhaust pipe is connected outside the oil cooler exhaust port; a traction transformer and an oil inlet pipe exhaust port are arranged at the top of the oil inlet pipe, and a detachable oil inlet pipe and a transformer exhaust pipe are connected to the traction transformer and the oil inlet pipe exhaust port.

Description

TECHNICAL FIELD

[0001] The utility model relates to traction transformer technical field, concretely is traction transformer oil injection exhaust system based on distribution. BACKGROUND

[0002] Traction transformer is one of the core components of EMU, and a large amount of heat is generated in the process of converting electric energy due to factors such as iron loss, copper loss, and load loss, so insulating oil is needed as a cooling medium to cool the internal coils, cores and other components, and the heat absorbed by the cooling medium is dissipated into the air through external secondary cooling devices.

[0003] The domestic EMU transformer is generally designed in an integrated manner of cooling system and traction transformer, and is hoisted under the car bottom. Due to space limitation, the traction transformer of a certain export type double-deck EMU is installed in the electrical compartment beside the aisle of the car at both ends of the head car (MC car). The cooling system also uses an integrated cooling tower commonly used on locomotives, and the main components of the traction transformer oil cooling system and its external secondary cooling device, and the traction converter water cooling system and its external secondary cooling device are integrated together.

[0004] After the traction transformer and the integrated cooling tower are installed on the EMU, the transformer oil inlet pipe, the transformer oil return pipe, and the equalization pipe need to be installed, and then the cooling system needs to be injected with oil.

[0005] The traditional traction transformer cooling system injection adopts a high-lifting oil tank injection method, which needs to rely on a crane for lifting. In the production plant operation or in the section maintenance, many cases do not have crane equipment, and this method cannot be used. Even if there is a crane, the operation time is affected by other external factors. Therefore, it is necessary to improve it, and no same technical solution as the utility model is found through searching, only some related comparative technical documents are found, mainly including the following:

[0006] 1. The patent with application number 202210813961.9 discloses a transformer oil changing equipment and method, which comprises a coaxial pipe, one end of the coaxial pipe is provided with a flexible elbow, a stretching cylinder is arranged outside the coaxial pipe, and the driving end of the stretching cylinder is connected to the inside of the end of the flexible elbow through a flexible steel cable. The application adopts a coaxial pipe oil-gas two-way separation method to discharge and inject oil for the transformer. When discharging oil, the coaxial pipe and the injection pipe start at the bottom of the transformer, nitrogen is filled to balance the internal pressure, and the oil can be completely discharged; when injecting oil, the exhaust pipe inside the coaxial pipe starts at the top of the transformer shell, the internal gas of the transformer can be exhausted and the oil can be filled; the internal pressure of the transformer shell can be controlled and the load of the oil-immersed transformer can be monitored during operation, the transformer oil and nitrogen can guarantee the insulation effect during the oil changing process, the inert gas nitrogen and safety monitoring can reduce the safety hidden danger during the oil changing process. Although the patent can complete the transformer oil changing, the operation method is complex, and nitrogen needs to be carried, so it is necessary to improve it.

[0007] 2. The patent with application number 201621026200.5 discloses an electric multiple unit traction transformer intelligent cooling system, the electric multiple unit has a device cabin, the traction transformer is arranged in the device cabin, and the heat source component is placed in the oil tank, the cooling system comprises: a cooling device arranged in the device cabin; the cooling oil flowing out of the oil tank carries away the heat generated by the heat source component; the cooling device comprises: a radiator in communication with the oil tank through a cooling oil circulation pipeline; the cooling oil circulation pipeline comprises an oil inlet pipeline and an oil outlet pipeline; an oil pump is installed on the oil outlet pipeline; the cooling oil flowing out of the oil tank enters the radiator through the oil outlet pipeline and the oil pump; the radiator transfers heat from the cooling oil to cooling air; after releasing heat, the cooling oil returns to the oil tank through the oil inlet pipeline. The patent structure is complex, and the operation is tedious, so it is necessary to improve it.

[0008] 3. The patent with application number 201520530815.0 discloses a high-power electric locomotive traction transformer oil circulation cooling system, which comprises an oil cooler at one end of the oil cooler and in communication with the transformer body through an oil pipe, the other end of the oil cooler is provided with an axial flow pump, and the oil inlet of the axial flow pump is in communication with the transformer body through an oil pipe, and the oil outlet of the axial flow pump is in communication with the oil cooler through an oil pipe. Although the patent provides a high-power electric locomotive traction transformer oil circulation cooling system, the pressure loss or turbulent disturbance generated in the axial flow pump is smaller than that of general oil pumps, so as to reduce the internal power consumption and improve the efficiency of the oil circulation cooling system, but the patent cannot exclude the gas in the cooling system.

[0009] Through the analysis of the above patent, it can be found that the current traction transformer oil injection and exhaust system can complete oil injection and ensure that no gas enters the transformer, but the oil injection efficiency is low, the exhaust effect is not good, and the cost is high. In addition, due to the large amount of oil required by the traction transformer cooling system and the large capacity of the oil storage tank, the large oil storage tank is not convenient to transport, so it is necessary to improve it. Content of the utility model

[0010] The technical problem to be solved by the utility model is to provide a traction transformer oil injection and exhaust system which can effectively and quickly remove air in the traction transformer cooling system during oil injection of the traction transformer cooling system, and the device is simple, durable, convenient to operate and has good exhaust effect.

[0011] In view of the above problems, the technical scheme provided by the utility model is:

[0012] A traction transformer oil injection and exhaust system based on distributed oil injection and exhaust, comprising a traction transformer, an oil cooler, an oil pump, an oil inlet pipe and an oil return pipe. The traction transformer and the oil cooler are connected in series through the oil inlet pipe and the oil return pipe. The insulating oil in the traction transformer is pumped from the oil cooler into the traction transformer through the oil pump on the oil inlet pipe, and then returned to the oil cooler through the oil return pipe for circulating cooling. A box cover quick connector is arranged at the upper part of the traction transformer. The traction transformer is injected through the box cover quick connector. The traction transformer oil injection and exhaust system is characterized in that an equalizing pipe is arranged on the box cover quick connector of the traction transformer, the equalizing pipe is connected to an external oil storage tank, a detachable pressure air pump is arranged on the oil storage tank, and a breather is arranged on the oil storage tank. An oil cooler exhaust port is arranged at the top of the cooler. A detachable oil cooler exhaust pipe is connected to the outside of the oil cooler exhaust port. A traction transformer and oil inlet pipe exhaust port is arranged at the top of the oil inlet pipe. A detachable oil inlet pipe and transformer exhaust pipe is connected to the traction transformer and oil inlet pipe exhaust port.

[0013] Further, the detachable pressure air pump arranged on the oil storage tank is provided with an inflation port at the top of the oil storage tank. The inflation port is connected to a gas pump quick connector through an inflation pipe line provided with a dehumidification pipe. The gas pump quick connector is detachably and quickly connected to the pressure air pump. When inflation and pressurization are required, the pressure air pump is connected to the oil storage tank through the gas pump quick connector and inflates the oil storage tank. When inflation and pressurization are not required, the pressure air pump is detached through the gas pump quick connector.

[0014] Further, the oil cooler exhaust port is externally connected with a detachable oil cooler exhaust pipe, which is connected with the oil cooler exhaust port through an oil cooler quick connector; when exhaust is needed, the detachable oil cooler exhaust pipe is connected with the oil cooler exhaust port through the oil cooler quick connector; and when exhaust is not needed, the detachable oil cooler exhaust pipe is detached from the oil cooler quick connector.

[0015] Further, the traction transformer and oil inlet pipe exhaust port are externally connected with a detachable oil inlet pipe and transformer exhaust pipe, which is connected with the oil inlet pipe exhaust port through an oil inlet pipe quick connector; when the oil inlet pipe and the traction transformer need to be exhausted, the detachable oil inlet pipe and transformer exhaust pipe are connected with the oil inlet pipe exhaust port through the oil inlet pipe quick connector; and when the oil inlet pipe and the traction transformer do not need to be exhausted, the detachable oil inlet pipe and transformer exhaust pipe are detached from the oil inlet pipe quick connector, thereby forming detachable connection.

[0016] Further, the oil cooler exhaust pipe and the oil inlet pipe and transformer exhaust pipe are connected with an empty oil pot, which is used to receive the oil gas mixture discharged from the exhaust pipe, so that the gas in the oil cooler is discharged as much as possible, and the discharged oil does not pollute the external environment.

[0017] Further, when oil needs to be replenished, the equalizing pipe connected with the oil storage tank is disconnected from the traction transformer, the oil storage tank is connected with the oil pot containing qualified insulating oil through the equalizing pipe, and the equalizing pipe is further connected with an oil pump between the oil storage tank and the oil pot; the oil pump is used to replenish the oil storage tank; when the oil level scale on the oil storage tank reaches the corresponding scale of the transformer oil temperature, the oil pump is stopped, and the equalizing pipe is loosened.

[0018] Further, the height of the oil cooler exhaust quick connector is lower than the height of the oil inlet pipe exhaust quick connector.

[0019] Further, the oil inlet pipe and the oil return pipe are both provided with butterfly valves, which can prevent insulating oil from entering the oil cooler through the oil inlet pipe and the oil return pipe.

[0020] The beneficial effects of the utility model are as follows:

[0021] (1) The pressurized air pump is used to pressurize the oil storage tank, the exhaust pipe is inserted into the oil cooler exhaust interface, and the insulating oil in the oil storage tank flows through the traction transformer, the transformer oil inlet pipe and the transformer oil return pipe to be injected into the oil cooler, so that basically no air enters the transformer during the whole process;

[0022] (2) use empty oil canister to receive oil gas mixture discharged from exhaust pipe, make gas in oil cooler discharge as much as possible, make discharged oil not cause pollution to external environment;

[0023] (3) after oil in oil storage tank is used to oil cooler, use oil pump to supplement oil to oil storage tank, whole process does not need crane cooperation. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 it is schematic view for traction transformer and cooling system connection;

[0025] Figure 2 it is schematic view for oil cooler oiling by oil storage tank pressurization;

[0026] Figure 3 it is schematic view for oil storage tank oil supplement;

[0027] BRIEF DESCRIPTION OF DRAWINGS: (1) traction transformer;(101) oil pump;(102) tank cover quick connector;(103) high pressure terminal elevation seat exhaust plug;(104) butterfly valve;(2) oil storage tank;(201) oil storage tank quick connector;(202) breather;(203) oil level relay;(204) pressurization air pump;(301) oil cooler, (302) oil cooler exhaust quick connector;(4) oil inlet pipe;(401) oil inlet pipe exhaust quick connector;(5) oil return pipe;(6) equalizing pipe;(7) oil canister;(801) oil inlet pipe and transformer exhaust pipe;(802) oil cooler exhaust pipe;(9) inflation connector (with dehumidification pipe);(10) oil pump. DETAILED DESCRIPTION

[0028] The utility model will be further described in connection with the drawings:

[0029] The application discloses a kind of based on distributed oil injection exhaust traction transformer oil injection exhaust system, including traction transformer 1, oil cooler 301, oil pump 101, oil inlet pipe 4 and oil return pipe;Traction transformer 1 and oil cooler 301 are connected by oil inlet pipe 4 and oil return pipe, and the insulating oil in traction transformer 1 is pumped into traction transformer 1 from oil cooler 301 by oil pump 101 on oil inlet pipe 4, and then returned to oil cooler 301 by oil return pipe, and circulates cooling;Box cover quick connector 102 is arranged on the upper portion of traction transformer 1, and the traction transformer 1 is filled with oil through the box cover quick connector 102, characterized by: equalizing pipe 6 is arranged on the box cover quick connector 102 of traction transformer, and the equalizing pipe 6 is connected to an external oil storage tank 2, the oil storage tank 2 is provided with detachable pressurized air pump 204, and is provided with breather 202;Oil cooler 301 exhaust port is arranged at the top of cooler, and detachable oil cooler exhaust pipe 802 is connected outside the oil cooler 301 exhaust port;Traction transformer 1 and oil inlet pipe 4 exhaust port are arranged at the top of oil inlet pipe 4, and detachable oil inlet pipe and transformer exhaust pipe 801 are connected on the traction transformer and oil inlet pipe 4 exhaust port.

[0030] Further, the detachable pressurized air pump 204 on the oil storage tank 2 is provided with an air inlet on the top of the oil storage tank 2, the air inlet is connected with air pump quick connector through air filling pipeline with dehumidification pipe, the air pump quick connector is detachably and quickly connected with the pressurized air pump 204, when air pressure is needed, the pressurized air pump 204 is connected with the oil storage tank 2 through the air pump quick connector, and the oil storage tank 2 is filled with air; when air pressure is not needed, the pressurized air pump 204 is detached through the air pump quick connector.

[0031] Further, the detachable oil cooler exhaust pipe 802 connected outside the oil cooler 301 exhaust port is provided with oil cooler 301 exhaust port on the top of the oil cooler 301, the oil cooler 301 exhaust port is provided with oil cooler exhaust quick connector 302, the detachable oil cooler exhaust pipe 802 is connected with the oil cooler exhaust port through the oil cooler exhaust quick connector 302;When the oil cooler 301 needs to be exhausted, the detachable oil cooler exhaust pipe 802 is connected with the oil cooler exhaust port through the oil cooler exhaust quick connector 302, and when the oil cooler 301 does not need to be exhausted, the detachable oil cooler exhaust pipe 802 is detached from the oil cooler exhaust quick connector 302.

[0032] Further, the traction transformer and the oil inlet pipe 4 exhaust port is connected with a detachable oil inlet pipe and transformer exhaust pipe 801, which is an oil inlet pipe exhaust port arranged at the top of the oil inlet pipe 4, and an oil inlet pipe exhaust quick connector 401 is installed on the exhaust port, and the detachable oil inlet pipe and transformer exhaust pipe 801 is connected with the oil inlet pipe exhaust port through the oil inlet pipe exhaust quick connector 401; when the oil inlet pipe 4 and the traction transformer 1 need to be exhausted, the detachable oil inlet pipe and transformer exhaust pipe 801 is connected with the oil inlet pipe exhaust port through the oil inlet pipe exhaust quick connector 401, and when the oil inlet pipe 4 and the traction transformer 1 do not need to be exhausted, the detachable oil inlet pipe and transformer exhaust pipe 801 is detached from the oil inlet pipe exhaust quick connector 401, forming a detachable connection.

[0033] Further, the oil cooler exhaust pipe 802 is connected with the oil inlet pipe and transformer exhaust pipe 801, and an empty oil pot 7 is used to catch the oil and gas mixture discharged from the exhaust pipe, so that the gas in the oil cooler 301 is discharged as much as possible, and the discharged oil does not pollute the external environment.

[0034] Further, when the oil needs to be replenished, the equalizing pipe 6 connected with the oil tank 2 is disconnected with the traction transformer 1, the oil tank 2 is connected through the equalizing pipe 6 and the oil pot 7 filled with qualified insulating oil, and the equalizing pipe 6 is also connected with the oil pump 10 between the oil tank 2 and the oil pot 7, and the oil pump 10 is used to replenish the oil tank 2, and when the oil level scale on the oil tank 2 reaches the corresponding scale of the transformer oil temperature, the oil pump 10 is stopped and the equalizing pipe 6 is loosened.

[0035] Further, the height of the oil cooler exhaust quick connector 302 is lower than the height of the oil inlet pipe exhaust quick connector 401.

[0036] Further, the oil inlet pipe 4 and the oil return pipe 5 are both provided with butterfly valves 104, which can prevent insulating oil from entering the oil cooler through the oil inlet pipe 4 and the oil return pipe 5.

[0037] The specific oil injection steps are as follows: first, use the oil pump 10 to inject 80% of the oil into the oil tank 2, and then use the high-pressure air pump 204 to fill the oil tank 2 with dehumidified high-pressure gas, so that the qualified insulating oil in the oil tank 2 flows from the equalizing pipe 6 through the traction transformer 1, from the traction transformer 1 through the transformer oil inlet pipe 4 and the transformer oil return pipe 5, and is injected into the oil cooler 301, and the gas in the cooling system is discharged through the oil inlet pipe and transformer exhaust pipe 801 and the oil cooler exhaust pipe 802 during the oil injection period. After the oil injection is completed, the oil pump is used to replenish the oil tank to the oil level corresponding to the transformer oil temperature.

[0038] The utility model discloses beneficial effect is: (1) use pressurization air pump 204 to pressurize the oil storage cabinet 2, exhaust pipe is inserted to the oil cooler exhaust interface, makes the insulating oil in the oil storage cabinet 2 from the equalizing pipe 6 flow through traction transformer 1, transformer oil inlet pipe 4 and transformer oil return pipe 5 and injects into the oil cooler 301, the whole process is basically no air into transformer in. (2) use empty oil pot 7 to receive the oil gas mixture that exhaust pipe discharges, makes the gas in the oil cooler 301 as much as possible to discharge, makes the oil that discharges not to cause the pollution to external environment. (3) the oil in the oil storage cabinet 2 is used to oil cooler 301 oil injection, uses the oil pump 10 to the oil storage cabinet 2 and supplements the oil, whole process does not need crane cooperation.

Claims

1. A distributed traction transformer oil injection and exhaust system, comprising a traction transformer (1), an oil cooler (301), an oil pump (101), an oil inlet pipe (4) and an oil return pipe (5); the traction transformer (1) and the oil cooler (301) are connected in series through the oil inlet pipe (4) and the oil return pipe (5), the insulation oil in the traction transformer (1) is pumped from the oil cooler (301) into the traction transformer (1) through the oil pump (101) on the oil inlet pipe (4), and then returned to the oil cooler (301) through the oil return pipe (5) for circulating cooling, characterized in that: The traction transformer (1) is connected with an equalizing pipe (6), the equalizing pipe (6) is connected to an external oil tank (2), the oil tank (2) is provided with a detachable air pump (204) and a breather (202); an oil cooler exhaust port is arranged at the top of an oil cooler (301), and a detachable oil cooler exhaust pipe (802) is connected to the outside of the oil cooler exhaust port; a traction transformer (1) and an oil inlet pipe (4) exhaust port are arranged at the top of the oil inlet pipe (4), and a detachable oil inlet pipe and transformer exhaust pipe (801) is connected to the traction transformer (1) and the oil inlet pipe (4) exhaust port.

2. The distributed based traction transformer oiling and degassing system as claimed in claim 1, wherein: The upper part of the traction transformer (1) is provided with a tank cover quick connector (102), and the traction transformer (1) is filled with oil through the tank cover quick connector (102).

3. The distributed based traction transformer oiling and degassing system as claimed in claim 1, wherein: The oil tank (2) is detachably and quickly connected with the air pump (204) through the air pump quick connector, when air pressure is needed, the air pump (204) is connected with the oil tank (2) through the air pump quick connector, and the oil tank (2) is inflated; when air pressure is not needed, the air pump (204) is detached through the air pump quick connector.

4. The distributed based traction transformer oiling and degassing system as claimed in claim 2, wherein: An air inlet is arranged at the top of the oil tank (2), and the air inlet is connected with an air pump quick connector through an air charging pipeline (9) provided with a dehumidifying pipe.

5. The distributed based traction transformer oiling and degassing system as claimed in claim 1, wherein: The detachable oil cooler exhaust pipe (802) is connected to the outside of the oil cooler exhaust port of the oil cooler (301), the oil cooler exhaust port is arranged at the top of the oil cooler (301), an oil cooler exhaust quick connector (302) is installed outside the oil cooler exhaust port, the detachable oil cooler exhaust pipe (802) is connected with the oil cooler exhaust port through the oil cooler exhaust quick connector (302); when the oil cooler exhaust quick connector (302) needs to be exhausted, the detachable oil cooler exhaust pipe (802) is connected with the oil cooler exhaust port through the oil cooler exhaust quick connector (302), and when exhaust is not needed, the detachable oil cooler exhaust pipe (802) is detached from the oil cooler exhaust quick connector (302).

6. The distributed based traction transformer oiling and degassing system as claimed in claim 1, wherein: The detachable oil inlet pipe and transformer exhaust pipe (801) is connected to the traction transformer (1) and the oil inlet pipe exhaust port, the oil inlet pipe exhaust port is arranged at the top of the oil inlet pipe (4), an oil inlet quick connector is installed on the exhaust port, and the detachable oil inlet pipe and transformer exhaust pipe (801) is connected with the oil inlet pipe exhaust port through the oil inlet quick connector; when the oil inlet pipe (4) and the traction transformer (1) need to be exhausted, the detachable oil inlet pipe and transformer exhaust pipe (801) is connected with the oil inlet pipe exhaust port through the oil inlet pipe exhaust quick connector (401), when the oil inlet pipe (4) and the traction transformer (1) do not need to be exhausted, the detachable oil inlet pipe and transformer exhaust pipe (801) is detached from the oil inlet pipe exhaust quick connector (401), and detachable connection is formed.

7. The distributed based traction transformer oiling and degassing system as claimed in claim 1, wherein: The oil cooler exhaust pipe (802) is connected with the oil inlet pipe and the transformer exhaust pipe (801) with an empty oil pot (7), which is used to receive the oil gas mixture discharged from the exhaust pipe, so that the gas in the oil cooler (301) is discharged as much as possible, and the discharged oil does not pollute the external environment.

8. The distributed based traction transformer oiling and degassing system as claimed in claim 1, wherein: When oil needs to be supplemented, the equalizing pipe (6) connected with the oil storage tank (2) is disconnected with the traction transformer (1), the oil storage tank (2) is connected with the oil pot (7) containing qualified insulating oil through the equalizing pipe (6), the equalizing pipe (6) is further connected with the oil pump (10) between the oil storage tank (2) and the oil pot (7), the oil storage tank (2) is supplemented with oil by using the oil pump (10), and when the oil level scale on the oil storage tank (2) reaches the oil temperature corresponding scale, the oil pump (10) is stopped, and the equalizing pipe (6) is loosened.

9. The distributed based traction transformer oiling and degassing system as claimed in claim 5, wherein: The height of the oil cooler exhaust quick connector (302) is lower than the height of the oil inlet pipe exhaust quick connector (401).

10. The distributed based traction transformer oiling and degassing system as claimed in claim 1, wherein: The oil inlet pipe (4) and the oil return pipe (5) are both provided with butterfly valves (104), which can prevent insulating oil from entering the oil cooler (301) through the oil inlet pipe (4) and the oil return pipe (5).

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