CN216345443U - Emergency oil discharge device of extra-high voltage transformer body - Google Patents

Abstract

The utility model relates to the technical field of oil discharge of an extra-high voltage transformer and discloses an emergency oil discharge device of an extra-high voltage transformer body, which comprises a first connecting pipeline, wherein one end of the first connecting pipeline is used for being connected with a butterfly valve on the transformer body; the two electric ball valves are arranged in parallel, and one ends of the two electric ball valves are connected with the other end of the first connecting pipeline; through the technical scheme, when the transformer needs to discharge oil emergently, the operation and maintenance attendant remotely controls the two electric ball valves to be opened, so that the transformer oil in the oil tank flows into the oil collecting pit along the first connecting pipeline, the two electric ball valves and the second connecting pipeline in sequence, the aim of rapidly and remotely controlling oil discharge is fulfilled, the risk of further expansion of fire is reduced, and the safety of the operation and maintenance attendant is protected; the electric ball valve adopts redundant configuration, so that the reliable work of the oil discharge device is further ensured.

Description

Emergency oil discharge device of extra-high voltage transformer body

Technical Field

The utility model relates to the technical field of oil discharge of an extra-high voltage transformer, in particular to an emergency oil discharge device of an extra-high voltage transformer body.

Background

With the rapid development and the gradual maturity of the ultra-high voltage alternating current and direct current technology, the ultra-high voltage alternating current and direct current power transmission and transformation project plays an important role in a power grid in China, and a power transformer is used as a core device of the ultra-high voltage power transmission and transformation project and has a great importance in a plurality of ultra-high voltage power transmission and transformation devices. At present, the main heat dissipation and insulation medium of the ultra-high voltage transformer is transformer oil, and the ultra-high voltage transformer has the characteristics of large oil tank volume, high voltage level, complex structure and the like, so that higher requirements are provided for a fire-fighting system of the ultra-high voltage transformer.

The existing fire-fighting system commonly used by the extra-high voltage main transformer is mainly a fixed water spray fire-fighting system, and the fire-fighting system converts water into atomized water drops by utilizing high pressure through an atomizing nozzle. If the transformer is on fire, the water mist can be sprayed to the surface of the transformer through the spray head, on one hand, the fire is controlled through absorbing heat, on the other hand, the combustible materials are isolated from being contacted with oxygen, and the combustion condition is destroyed, so that the purposes of cooling and extinguishing open fire are achieved. This fire extinguishing system is when the intensity of a fire is less, and fire suppression effect is better, is difficult to form effectual putting out to the intensity of a fire when the intensity of a fire is great, and transformer oil in the oil tank can constantly burn, even the explosion accident takes place. Usually, the bottom of the transformer is provided with an accident oil drain valve, but the valve needs to be manually opened by an operation and maintenance attendant after the transformer fails, and if the operation and maintenance attendant goes to open the accident oil drain valve when a fire happens, the accident oil drain valve has high danger.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problem that operation and maintenance personnel have high danger of opening an accident oil discharge valve when a transformer is in a fire disaster in the prior art, and provides an emergency oil discharge device of an extra-high voltage transformer body.

In order to achieve the above object, the present invention provides an emergency oil discharge device for an extra-high voltage transformer body, comprising:

one end of the first connecting pipeline is used for being connected with a butterfly valve on the transformer body;

the two electric ball valves are arranged in parallel, and one ends of the two electric ball valves are connected with the other end of the first connecting pipeline;

and the other end of the electric ball valve is connected with one end of the second connecting pipeline, and the other end of the second connecting pipeline extends to the inside of the oil collecting pit.

Optionally, the first connection pipe comprises:

the substitute ball valve is used for connecting one end with the butterfly valve;

a first three-way pipe, wherein the first end of the first three-way pipe is connected with the other end of the substitute ball valve;

the expansion ball valve is connected with the second end of the first three-way pipe;

one end of the maintenance ball valve is connected with the third end of the first three-way pipe;

one end of the oil inlet pipe is connected with the other end of the maintenance ball valve;

and the first end of the second three-way pipe is connected with the other end of the oil inlet pipe, and the second end and the third end of the second three-way pipe are respectively connected with one end of each of the two electric ball valves.

Optionally, a corrugated hose is arranged between the oil inlet pipe and the first end of the second three-way pipe, one end of the corrugated hose is connected with the other end of the oil inlet pipe, and the other end of the corrugated hose is connected with the first end of the second three-way pipe.

Optionally, the second tee comprises:

the vacuumizing valve is arranged at the top of the second three-way pipe and used for connecting vacuumizing equipment to vacuumize the inside of the second three-way pipe;

and the oil injection and drainage valve is arranged at the bottom of the second three-way pipe and is used for connecting equipment for injecting or draining oil so as to realize oil injection or drainage in the second three-way pipe.

Optionally, the emergency oil discharge device further includes two leakage detectors, and the two leakage detectors are respectively disposed on the two electric ball valves to monitor whether oil leaks from the corresponding electric ball valves.

Optionally, the second connecting duct comprises:

the first end and the second end of the third three-way pipe are respectively connected with the other ends of the two electric ball valves;

and one end of the oil outlet pipe is connected with the third end of the third three-way pipe, and the other end of the oil outlet pipe extends to the inside of the oil collecting pit.

Optionally, the other end of the oil outlet pipe is provided with a rat guard net.

Optionally, the inclination angle of the other end of the oil inlet pipe relative to the horizontal plane where one end of the oil inlet pipe is located is 1-1.5 degrees; the vertical height of the substitute ball valve and the oil outlet pipe is 400-600 mm.

Optionally, a fire-proof cover is arranged outside each of the two electric ball valves.

Optionally, a control loop is further included, the control loop comprising:

one end of the alternating current power supply is connected with the motor of the electric ball valve;

the power supply indicator light is connected with the alternating current power supply in parallel;

one end of the power switch is connected with the other end of the alternating current power supply;

the other end of the power switch is connected with two end points on one side of the double-pole single-throw switch, and one end point on the other side of the double-pole single-throw switch is connected with a motor of the electric ball valve;

one switch of the interlocking switch is connected to the high-voltage side of the transformer body, one end of the other switch of the interlocking switch is connected with the other end point of the other side of the double-pole single-throw switch, and the other end of the other switch of the interlocking switch is connected with the motor of the electric ball valve.

Through the technical scheme, when the transformer needs to discharge oil emergently, the operation and maintenance attendant remotely controls the two electric ball valves to be opened, so that the transformer oil in the oil tank flows into the oil collecting pit along the first connecting pipeline, the two electric ball valves and the second connecting pipeline in sequence, the aim of rapidly and remotely controlling oil discharge is fulfilled, the risk of further expansion of fire is reduced, and the safety of the operation and maintenance attendant is protected; the electric ball valve adopts redundant configuration, so that the reliable work of the oil discharge device is further ensured.

Drawings

Fig. 1 is a schematic structural diagram of an emergency oil drainage device of an extra-high voltage transformer body according to an embodiment of the utility model;

FIG. 2 is a schematic diagram of the position of an oil drain valve in an emergency oil drain device of an extra-high voltage transformer body according to one embodiment of the utility model;

fig. 3 is a circuit diagram of a control loop in an emergency oil drainage device of an extra-high voltage transformer body according to an embodiment of the utility model;

fig. 4 is an exemplary diagram of a control panel for main transformer oil drainage in an emergency oil drainage device of an extra-high voltage transformer body according to an embodiment of the utility model.

Description of the reference numerals

1. Substitute ball valve 2, first three-way pipe

3. Expansion ball valve 4 and maintenance ball valve

5. Oil inlet pipe 6 and support rod

7. Corrugated hose 8 and second three-way pipe

9. Vacuum-pumping valve 10 and electric ball valve

11. Third three-way pipe 12 and leakage detector

13. Oil outlet pipe 14, oil filling and discharging valve

GYAD, power indicator QA11, power switch

S1, double-pole single-throw switch S21 and interlocking switch

Detailed Description

The following detailed description of embodiments of the utility model refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

Fig. 1 is a schematic structural diagram of an emergency oil drainage device of an extra-high voltage transformer body according to an embodiment of the utility model. In fig. 1, the emergency oil discharge device of the extra-high voltage transformer body may include a first connection pipe, two electric ball valves 10, and a second connection pipe.

One end of the first connecting pipeline is used for being connected with a butterfly valve on the transformer body; the two electric ball valves 10 are arranged in parallel, and one ends of the two electric ball valves 10 are connected with the other end of the first connecting pipeline; the other ends of the two electric ball valves 10 are connected with one end of a second connecting pipeline, and the other end of the second connecting pipeline extends to the inside of the oil collecting pit.

When the transformer need promptly arrange oil, operation and maintenance person on duty opens at two electric ball valve 10 of control room operation control for the inside transformer oil of oil tank can be discharged along first connecting tube, two electric ball valve 10 and second connecting tube in proper order, flows to the inside of sump pit at last. The electric ball valves 10 are in redundant configuration and are provided with two electric ball valves, so that when one electric ball valve 10 breaks down, the other electric ball valve 10 can be normally opened when emergency oil drainage is needed, and the reliability of the oil drainage device is further improved.

In the fire extinguishing system of current transformer, often adopt fixed water spray fire extinguishing system in order to control the intensity of a fire of transformer, if when the intensity of a fire is great, operation and maintenance person on duty need manually open the accident oil drain valve of transformer body bottom in order to discharge the inside oil of transformer, avoid transformer oil burning in the oil tank to cause serious consequence, at the in-process that operation and maintenance person on duty opened the accident oil drain valve, the transformer is constantly then, has higher danger, has caused certain threat to operation and maintenance person on duty's life safety. In the embodiment of the utility model, the two electric ball valves 10 are arranged in parallel, so that the transformer oil in the oil tank can be discharged in a remote control manner, the safety of operation and maintenance operators is protected, the risk of further expansion of fire is reduced, and the oil can be stably discharged.

In this way of the utility model, as shown in fig. 1, the first connecting pipeline may include a substitute ball valve 1, a first tee pipe 2, an expansion ball valve 3, a service ball valve 4, an oil inlet pipe 5, and a second tee pipe 8.

One end of the substitute ball valve 1 is connected with a butterfly valve, and the first end of the first three-way pipe 2 is connected with the other end of the substitute ball valve 1; the expansion ball valve 3 is connected with the second section of the first three-way pipe 2; one end of the maintenance ball valve 4 is connected with the other end of the maintenance ball valve 4; one end of the oil inlet pipe 5 is connected with the other end of the maintenance ball valve 4; the first end of the second three-way pipe 8 is connected with the other end of the oil inlet pipe 5, and the second end of the second three-way pipe 8 and the third end of the second three-way pipe 8 are respectively connected with one end of two electric ball valves 10.

In the running process of the transformer, a butterfly valve of the transformer, the replacement ball valve 1 and the maintenance ball valve 4 are in an open state daily, and the expansion ball valve 3 is in a closed state daily. When the transformer is on fire and needs emergency oil discharge, transformer oil enters the substitute ball valve 1 along a butterfly valve, sequentially passes through the first three-way pipe 2, the maintenance ball valve 4, the oil inlet pipe 5 and the second three-way pipe 8, and finally enters the second connecting pipeline along the opened electric ball valve 10 and flows out. The substitute ball valve 1 is used for substituting a butterfly valve, the interior of the transformer can be communicated with the emergency oil discharge device, and the expansion ball valve 3 is used for connecting a pipeline to expand the flow direction of transformer oil; the maintenance ball valve 4 is used for annual maintenance of oil discharge equipment and replacement and maintenance when a new valve and a pipeline go wrong.

In this embodiment of the utility model, as shown in fig. 1, the second connecting pipe may include a third tee 11 and a flow line 13.

The first end and the second end of the third three-way pipe 11 are respectively connected with the other ends of the two electric ball valves 10; one end of the oil outlet pipe 13 is connected with the third end of the third three-way pipe 11, and the other end of the oil outlet pipe 13 extends to the inside of the oil collecting pit.

When the transformer oil flows through the two electric ball valves 10, the transformer oil flows to the inside of the oil collecting pit along the third three-way pipe 11 and the oil outlet pipe 13, and the oil collecting pit can perform emergency storage on the transformer oil so as to avoid the more serious consequences caused by the combustion of the transformer oil.

In this embodiment of the present invention, the material of the first tee 2, the oil inlet pipe 5, the second tee 8, the third tee 11, and the oil outlet pipe 13 may be various types known to those skilled in the art, such as copper pipe, iron pipe, and the like. However, in a preferred example of the present invention, the first three-way pipe 2, the oil inlet pipe 5, the second three-way pipe 9, the third three-way pipe 11, and the oil outlet pipe 13 are made of seamless steel pipes in consideration of the fire resistance and corrosion resistance of the emergency oil discharge device.

In this embodiment of the utility model, as shown in fig. 1 and 2, the emergency oil drain device may further include a bellows hose 7. Specifically, the corrugated hose 7 is disposed between the oil inlet pipe 5 and the first end of the second three-way pipe 8, one end of the corrugated hose 7 is connected to the other end of the oil inlet pipe 5, and the other end of the corrugated hose 7 is connected to the first end of the second three-way pipe 8.

The transformer can produce vibrations when normal operating, and the transformer drives emergent oil extraction device vibrations, and then makes into oil pipe 5 and second three-way pipe 8 follow vibrations, owing to advance oil pipe 5 and second three-way pipe 8 and be the steel pipe, the steel pipe is the rigid metal, therefore high frequency vibrations can make the extrusion that the steel pipe bore stress, so can easily lead to the steel pipe fracture for a long time. Through set up corrugated hose 7 between advancing oil pipe 5 and second three-way pipe 8, can effectively alleviate the stress extrusion between the steel pipe, improve this emergent oil extraction device's life. In addition, the arrangement of the corrugated hose 7 including, but not limited to, between the oil inlet pipe 5 and the second tee pipe 8 can be set according to actual requirements.

In this embodiment of the utility model, the inner diameters of the replacement ball valve 1, the first tee 2, the expansion ball valve 3, the service ball valve 4, the oil inlet pipe 5, the corrugated hose 7, the second tee 8, the electric ball valve 10, the third tee 11, and the oil outlet pipe 13 may be various sizes known to those skilled in the art, such as 100mm, 200mm, etc. However, in a preferred example of the present invention, in consideration of the efficiency of the transformer oil discharge, the inner diameter of the replacement ball valve 1, the first tee pipe 2, the expansion ball valve 3, the service ball valve 4, the oil inlet pipe 5, the corrugated hose 7, the second tee pipe 8, the electric ball valve 10, the third tee pipe 11, and the oil outlet pipe 13 may be 150 mm.

In this embodiment of the utility model, as shown in fig. 1 and 2, the second tee 8 may include a vacuum pump valve 9 and a fill and drain valve 14.

The vacuumizing valve 9 is arranged at the top of the second three-way pipe 8 and is used for connecting vacuumizing equipment to vacuumize the inside of the second three-way pipe 8; and the oil injection and drainage valve 14 is arranged at the bottom of the second three-way pipe 8 and is used for connecting oil injection or drainage equipment so as to realize oil injection or drainage inside the second three-way pipe 8.

The vacuum-pumping valve 9 is used for vacuumizing the space between the butterfly valve and the electric ball valve 10, so that the phenomenon that the flowing of transformer oil is influenced due to too much air in the first connecting pipe is avoided. After the interior of the first connecting pipe is vacuumized, the oil filter is connected with an oil injection and discharge valve 14 so as to inject oil into the interior of the first connecting pipe; when oil drainage is needed, the transformer oil can flow out along the oil filling and drainage valve 14 by opening the oil filling and drainage valve 14. In traditional transformer, when need evacuation oiling or the oil drain, need connect the valve on the transformer body, because the shape of extra-high voltage transformer body is great and place highly higher characteristic for operating personnel is inconvenient to the inside oiling of transformer or the oil drain operation. In the embodiment of the utility model, the vacuum-pumping valve 9 and the oil-filling and draining valve 14 are added to the second three-way pipe 8, so that the operations of vacuum pumping and oil filling and draining can be facilitated for operators. In the embodiment of the present invention, in order to facilitate the adaptation of the apparatus size, the inner diameter of the evacuation valve 9 and the fill/drain valve 14 may be 25 mm.

In this embodiment of the present invention, as shown in fig. 1, the emergency oil drain device may further include two leak detectors 12. Specifically, two leak detectors 12 are respectively provided on the two motorized ball valves 10 to detect whether or not the corresponding motorized ball valve 10 leaks oil.

When the ball check 10 leaks oil, the transformer oil flows to the inside of the leak detector 12. The leakage detector 12 is of a floating ball type structure, and when the floating ball rises to a specific height, an oil leakage signal is sent out to prompt an operation and maintenance attendant, so that the operation and maintenance attendant can timely handle the oil leakage signal.

In this embodiment of the utility model, the emergency drain may further comprise two manual drain valves. Specifically, two manual oil drain valves are provided on the first end and the second end of the third three-way pipe 11, respectively. Specifically, two manual oil drain valves are both arranged at the bottom of the third tee pipe 11.

When the leakage detector 12 sends out the oil leakage signal, the manual oil drain valve is opened to determine whether the electric ball valve 10 leaks oil, so as to determine whether the leakage detector 12 has false alarm.

In this embodiment of the utility model, the sump may include a sump, an oil drain, and a sump. Specifically, the oil collecting pool can also comprise a steel grating and cobblestones.

The oil discharge pipeline sets up between oil collection hole and accident oil pool, and the oil collection hole passes through oil discharge pipeline and accident oil pool intercommunication, and the steel grating setting just can cover the cross-section in oil collection hole in the inside of oil collection pool, and the cobblestone is laid in the top of steel grating, and the oil outlet pipe mouth of pipe of the 13 other ends of oil outlet pipe passes the steel grating and extends to the well upper portion of oil discharge pipeline.

Steel grating and cobblestone can prevent that the conflagration from spreading in value collection oil pit and the accident oil bath, avoid causing bigger loss and accident. The oil outlet pipe mouth of the oil outlet pipe 13 penetrates through the steel grating and extends to the middle upper part of the oil discharge pipeline, so that the transformer oil can be discharged efficiently.

In this embodiment of the present invention, the emergency oil drain device may further include a rat guard net. Specifically, the other end of the oil outlet pipe 13 is provided with a rat guard.

The ratproof net can prevent cobblestones and other foreign matters from blocking the oil discharge port of the pipeline, and further can avoid more serious loss caused by unsmooth oil discharge.

In the embodiment of the present invention, the inclination angle of the other end of the oil inlet pipe 5 with respect to the horizontal plane on which one end of the oil inlet pipe 5 is located is 1 ° to 1.5 °; this substitute ball valve 1 is 400 ~ 600mm height difference about with the vertical height of oil pipe 13, and the guarantee oil extraction system that can furthest does not appear the nest gas phenomenon.

In this embodiment of the present invention, fire-proof covers are provided on the exterior of both of the electric ball valves 10. Specifically, this fire prevention cover can carry out fire prevention protection to electric ball valve 10, can ensure when the transformer conflagration breaks out, and electric ball valve 10 can have 90min reliable oil extraction time.

In this embodiment of the present invention, as shown in fig. 1 and 2, the emergency oil drain device may further include a plurality of support rods 6. Specifically, the support rods 6 are respectively arranged at the bottoms of the second tee pipe 8 and the third tee pipe 11 to support the second tee pipe 8 and the third tee pipe 11. In addition, the support rod 6 can include, but is not limited to, the bottom of the second tee 8 and the third tee 11, and can also be arranged at the bottom of the first tee 2, the oil inlet pipe 5 or the oil outlet pipe 13 according to actual requirements.

In this embodiment of the utility model, the emergency oil drain device may further comprise a rubber pad. Specifically, the rubber pads are arranged between the second three-way pipe 8 and the support rod 6 and between the third three-way pipe 11 and the chasing support rod 6, and the rubber pads can buffer pipeline vibration of the emergency oil discharge device generated in normal operation of the transformer.

In this embodiment of the utility model, the emergency drain may also include a control circuit, as shown in fig. 3. Specifically, the control loop may include an ac power source, a power indicator light GYAD, a power switch QA11, a double pole, single throw switch S1, and an interlock switch S21.

One end of the alternating current power supply is connected with a motor of the electric ball valve 10; the power indicator GYAD is connected with an alternating current power supply in parallel; one end of the power switch QA11 is connected to the other end of the ac power supply; the other end of the power switch QA11 is connected with two end points of one side of the double-pole single-throw switch S1, and one end point of the other side of the double-pole single-throw switch S1 is connected with the motor of the electric ball valve 10; one switch of the interlocking switch S21 is connected to the high-voltage side of the transformer body, one end of the other switch of the interlocking switch S21 is connected with the other end point of the other side of the double-pole single-throw switch S1, and the other end of the other switch is connected with the motor of the electric ball valve 10.

When the transformer normally operates, the power switch QA11 is in an off state, that is, the power indicator light GYAD is in an off state. When a fire disaster occurs to the transformer, the short circuit is caused by the internal fault of the transformer, at the moment, the gas relay in the transformer acts, the three-side switch is tripped, namely the switch of the interlocking switch S21 connected to the high-voltage side is switched off, and the other switch of the interlocking switch S21 is switched on. Meanwhile, the power switch QA11 is manually turned on by operation, so that an alternating current power supply is connected to the control loop, the power indicator lamp GYAD is turned on, the operator closes the double-pole single-throw switch S1 again, the control loop is conducted, the motor of the electric ball valve 10 is started, the electric ball valve 10 is turned on, and the purpose of discharging transformer oil in the transformer body in an emergency mode can be achieved. In addition, adopt interlock switch S21 can prevent the fault-free oil extraction that the operating personnel maloperation leads to, avoided the emergence of major accident.

In the embodiment of the present invention, the connection mode of one of the interlock switches S21 is not limited to the high voltage side of the transformer body, and may be connected to the high voltage side and the medium voltage side, the high voltage side and the low voltage side, and the like.

In this embodiment of the utility model, the number of control loops for this can be 1, 2 as known to those skilled in the art. However, in a preferred example of the present invention, the number of the control loops is 2 in consideration of reliability of control of the electric ball valve 10. Specifically, the two control loops control the two electric ball valves 10 respectively, and the ac power supplies of the two control loops are independent of each other, and the two ac power supplies are taken from different bus segments respectively. Specifically, the bus section employs a UPS uninterruptible power supply system.

In this embodiment of the utility model, the emergency drain may further include an emergency release interlock handle. Specifically, the emergency release interlock handle is used to release the interlock relationship between two switches of the interlock switch S21.

When a fire disaster occurs to the transformer, the interlocking switch S21 is in failure or is in false locking, so that the other switch of the interlocking switch S21 cannot be closed, and a control loop cannot be conducted. At this time, the operator rotates the emergency release interlock handle to unlock the two switches of the interlock switch S21, and closes the other switch of the interlock switch S21 to discharge oil in an emergency.

In the present embodiment of the utility model, the specific material for the ball valve 10 may be various types known to those skilled in the art, such as stainless steel, alloy steel, etc. However, in a preferred example of the present invention, in consideration of the service life and reliability of the electric ball valve 10, the electric ball valve 10 is made of SUS304 stainless steel, which can prevent the electric ball valve 10 from being damaged by rust, seizure, etc. over a period of time, and thus the electric ball valve 10 cannot be used normally.

In this embodiment of the utility model, a flanged connection is used between the valve and the pipe. Specifically, the flange butt joint surface type is that a flange with a sealing groove and a flat flange are used in a paired combination.

In this embodiment of the utility model, the emergency oil drain device further comprises a gasket. Specifically, a gasket is provided between the flanges to seal a gap between the flanges.

In this embodiment of the present invention, the specific material for the gasket may be various types known to those skilled in the art, such as a stainless steel gasket, a rubber gasket, and the like. However, in a preferred embodiment of the present invention, the specific material of the gasket may be fluorosilicone rubber in consideration of the sealing effect between the flanges.

In the embodiment of the utility model, a fire-resistant armored cable is adopted as a cable for connecting the control circuit and the emergency oil drainage device so as to deal with the situation that a fire disaster happens to the transformer.

In this embodiment of the utility model, the emergency oil drain device may further comprise a refractory tank and a stainless steel metal hose. Specifically, the fire-resistant groove box and the stainless steel metal hose are respectively sleeved at different positions of the cable to perform fire protection on the cable.

In this embodiment of the present invention, a control panel for discharging oil from the main transformer is shown in fig. 4. In particular, the panel element names of the control screen may be as shown in table 1.

TABLE 1 statistical table of names of elements in panel

Through the technical scheme, when the transformer needs to discharge oil emergently, the operation and maintenance attendant remotely controls the two electric ball valves 10 to be opened, so that the transformer oil in the oil tank flows into the oil collecting pit along the first connecting pipeline, the two electric ball valves 10 and the second connecting pipeline in sequence, the purpose of rapidly and remotely controlling oil discharge is achieved, the risk of further expansion of fire is reduced, and meanwhile, the safety of the operation and maintenance attendant is protected; the electric ball valve 10 adopts a redundant configuration, so that the reliable operation of the oil discharge device is further ensured.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention. It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the utility model is not described in any way for the possible combinations in order to avoid unnecessary repetition.

In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.

Claims (10)

1. The utility model provides an emergent oil extraction device of extra-high voltage transformer body which characterized in that includes:

one end of the first connecting pipeline is used for being connected with a butterfly valve on the transformer body;

the two electric ball valves (10) are arranged in parallel, and one ends of the two electric ball valves (10) are connected with the other end of the first connecting pipeline;

and the other ends of the two electric ball valves (10) are connected with one end of the second connecting pipeline, and the other end of the second connecting pipeline extends to the inside of the oil collecting pit.

2. The emergency oil drain device according to claim 1, wherein the first connection pipe includes:

the substitute ball valve (1) is connected with the butterfly valve at one end;

a first three-way pipe (2), wherein the first end of the first three-way pipe is connected with the other end of the alternative ball valve (1);

the expansion ball valve (3) is connected with the second end of the first three-way pipe (2);

one end of the maintenance ball valve (4) is connected with the third end of the first three-way pipe (2);

one end of the oil inlet pipe (5) is connected with the other end of the maintenance ball valve (4);

and a second three-way pipe (8), wherein the first end of the second three-way pipe is connected with the other end of the oil inlet pipe (5), and the second end and the third end of the second three-way pipe are respectively connected with one end of each of the two electric ball valves (10).

3. The emergency oil discharge device according to claim 2, characterized in that a corrugated hose (7) is arranged between the oil inlet pipe (5) and the first end of the second three-way pipe (8), one end of the corrugated hose (7) is connected with the other end of the oil inlet pipe (5), and the other end of the corrugated hose (7) is connected with the first end of the second three-way pipe (8).

4. The emergency oil drain according to claim 2, characterized in that the second tee (8) comprises:

the vacuumizing valve (9) is arranged at the top of the second three-way pipe (8) and is used for connecting vacuumizing equipment to vacuumize the inside of the second three-way pipe (8);

and the oil injection and drainage valve (14) is arranged at the bottom of the second three-way pipe (8) and is used for connecting equipment for injecting or draining oil so as to realize oil injection or drainage in the second three-way pipe (8).

5. The emergency oil drain device according to claim 1, further comprising two leakage detectors (12), wherein the two leakage detectors (12) are respectively disposed on the two motorized ball valves (10) to monitor whether oil leaks from the corresponding motorized ball valves (10).

6. The emergency oil drain device according to claim 2, wherein the second connecting pipe comprises:

a third three-way pipe (11), wherein the first end and the second end of the third three-way pipe are respectively connected with the other ends of the two electric ball valves (10);

and one end of the oil outlet pipe (13) is connected with the third end of the third three-way pipe (11), and the other end of the oil outlet pipe extends into the oil collecting pit.

7. The emergency oil drain device according to claim 6, wherein the other end of the oil outlet pipe (13) is provided with a rat guard.

8. The emergency oil discharge device according to claim 6, wherein the other end of the oil inlet pipe (5) is inclined at an angle of 1 ° to 1.5 ° with respect to a horizontal plane in which one end of the oil inlet pipe (5) is located; the vertical height of the substitute ball valve (1) and the oil outlet pipe (13) is 400-600 mm.

9. The emergency oil drain device according to claim 1, wherein the exterior of both of the motorized ball valves (10) is provided with a fire-proof cover.

10. The emergency oil drain device of claim 1, further comprising a control circuit, the control circuit comprising:

one end of the alternating current power supply is connected with the motor of the electric ball valve (10);

the power supply indicator light is connected with the alternating current power supply in parallel;

one end of the power switch is connected with the other end of the alternating current power supply;

the other end of the power switch is connected with two end points on one side of the double-pole single-throw switch, and one end point on the other side of the double-pole single-throw switch is connected with a motor of the electric ball valve (10);

one switch of the interlocking switch is connected to the high-voltage side of the transformer body, one end of the other switch of the interlocking switch is connected with the other end point of the other side of the double-pole single-throw switch, and the other end of the other switch of the interlocking switch is connected with a motor of the electric ball valve (10).

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