Special explosion-proof electric submersible pump transformer for oil field

Abstract

The utility model discloses an explosion-proof electric submersible pump transformer special for an oil field, and relates to the field of transformers, the explosion-proof electric submersible pump transformer comprises a protective shell, the two sides of the protective shell are both provided with circulation notches, the two sides, corresponding to the circulation notches, of the protective shell are both fixedly provided with heat dissipation parts, and each heat dissipation part comprises a central pipe. According to the utility model, through the arrangement of the rotating part, each radiating fin can be cleaned without dismounting the radiating part, and the condition that the radiating fins are damaged due to the change of internal pressure during rotation is prevented; the internal pressure change is small when the cooling fins rotate, and if the cooling fins are damaged by carelessness during cleaning, the sliding rings block the connecting grooves at the moment, so that even if the cooling fins are damaged, oil cannot leak, the running safety of the device is guaranteed, the adhesion condition of sticky substances is reduced, and the heat exchange efficiency of the device is improved.

Description

Technical Field

[0001] The utility model relates to the field of submersible electric pumps, in particular to an explosion-proof submersible electric pump transformer special for oil fields. Background Art

[0002] Submersible electric pump, full name electric submersible centrifugal pump, referred to as electric pump, is a kind of downhole lifting equipment that lowers the submersible motor and centrifugal pump into the oil well below the liquid level for pumping;

[0003] Submersible electric pumps require transformers when in use. In submersible electric pump units, the main function of the transformer is to convert the grid voltage into the voltage required by the submersible motor. The transformer is an indispensable part of the submersible electric pump system. It ensures that the submersible motor can operate at an appropriate voltage. Through the transformer, the high voltage of the grid can be converted into low voltage electricity suitable for the operation of the submersible motor, ensuring the normal operation and efficiency of the motor.

[0004] Because inflammable and explosive gases are easily generated in the oil field environment, and there are more pollutants and vaporized oil suspended in the air at the oil field location, if the transformer working in this environment generates electric sparks, it is easy to ignite the inflammable and explosive gases, resulting in major safety accidents, so it is necessary to use explosion-proof and spark-proof transformers. The oil-immersed transformers in the existing technology have good explosion-proof capabilities, and because the windings are immersed in insulating oil, it is difficult to generate arcs, and the windings are isolated from the air and will not contact inflammable and explosive gases, and even if an arc occurs, it will not ignite the inflammable and explosive gases, so most oil-immersed transformers are used in oil fields;

[0005] However, traditional oil-immersed transformers have many densely packed cooling blades. When used in an oil field environment, sticky liquefied oil is easily generated between the cooling blades. Since the gaps between the cooling blades are small, workers cannot clean them. The cooling blades can only be cleaned and repaired after disassembly. The sticky substance attached to the cooling blades will cause the thermal conductivity of the cooling blades to deteriorate, and the transformer will be easily damaged after long-term use.

[0006] Therefore, it is necessary to propose a special explosion-proof submersible electric pump transformer for oil fields to solve the above problems. Utility Model Content

[0007] The utility model aims to provide an explosion-proof submersible electric pump transformer for oil fields, so as to solve the problem that the heat dissipation blades are inconvenient to clean and need to be disassembled for maintenance.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an explosion-proof submersible electric pump transformer for oil fields, comprising a protective shell, both sides of the protective shell are provided with flow slots, both sides of the protective shell corresponding to the flow slots are fixedly installed with heat dissipation components, the heat dissipation components include a central tube, the central tube is connected to the flow slots, the upper and lower sides of the central tube are provided with a plurality of evenly distributed connecting grooves, the outer side of the central tube is rotatably installed with a plurality of heat sinks corresponding to the connecting grooves, the inner side of the central tube is rotatably installed with a plurality of rotating components corresponding to the connecting grooves, and when the heat sinks rotate, the rotating components are used to change the state of the oil inside the heat sinks.

[0009] Preferably, the rotating component includes two sliding rings, two flow gaps are provided between the two sliding rings, the sliding rings are tightly fitted on the inner surface of the center tube, a connecting block is fixedly installed on one end of the sliding ring, the connecting block is slidably clamped inside the connecting groove, the connecting block is fixedly installed in the middle of the heat sink, a plurality of sealing rubber rings corresponding to the rotating component are provided inside the center tube, the sealing rubber rings are fixedly installed on the two sliding rings, a sealing rubber block is fixedly installed on one end of the sliding ring away from the connecting block, the sealing rubber block is tightly fitted to the inner wall of the center tube, sealing rings are fixedly installed in the middle of both sides of the heat sink, and the sealing rings are rotatably installed on the outer surface of the center tube.

[0010] Preferably, two mutually symmetrical protective plates are fixedly installed in the middle position inside the protective shell, and two mutually symmetrical oil pumps are fixedly installed in the middle position inside the protective shell. The oil pump is located between the two protective plates, and the output end of the oil pump is fixedly connected to a liquid outlet pipe, and the input end of the oil pump is fixedly connected to a liquid inlet pipe.

[0011] Preferably, the end of the central tube away from the protective shell has a round head, and the liquid outlet pipe extends to the round head.

[0012] Preferably, baffles are hingedly connected to upper ends of both sides of the protection shell and the heat dissipation component, and two mutually symmetrical triangular support blocks are fixedly mounted on both sides of the protection shell and the baffle.

[0013] Preferably, fans are fixedly mounted on both side ends of the protective shell corresponding to the heat dissipation component.

[0014] Preferably, a plurality of high-voltage interfaces and low-voltage interfaces are fixedly installed on the upper surface of the protective shell, a plurality of high-voltage windings corresponding to the high-voltage interfaces are fixedly installed inside the protective shell, a plurality of low-voltage windings corresponding to the low-voltage interfaces are fixedly installed inside the protective shell, and the outside of the high-voltage winding and the low-voltage winding are both covered with protective shells.

[0015] Preferably, an oil storage tank is provided above one side of the protective shell, and a plurality of connecting pipes are fixedly connected to the bottom end of the oil storage tank. The connecting pipes are fixedly mounted on the protective shell, and the connecting pipes are communicated with the protective shell.

[0016] Technical effects and advantages of the utility model:

[0017] The device is provided with a rotating component, so that each heat sink can be cleaned without disassembling the heat sink component, thereby preventing the heat sink from being damaged due to changes in internal pressure when rotating, ensuring that the internal pressure changes are small when the heat sink rotates. If the heat sink is accidentally damaged during cleaning, the sliding ring will block the connecting groove at this time, and even if the heat sink is damaged, the oil will not leak, thereby ensuring the safety of the device operation, reducing the adhesion of viscous substances, and improving the heat exchange efficiency of the device;

[0018] The device is provided with an oil pump, which draws oil from the inside of the protective shell through the liquid inlet pipe and then discharges it to the position of the central tube through the liquid outlet pipe. Because the round head is spherical, the liquid driven by the oil pump impacts the round head and returns to the inside of the protective shell through the central tube, thereby increasing the flow rate of the oil inside the central tube. Therefore, the pressure inside the central tube is reduced at this time, and the oil inside the heat sink is sucked away, thereby increasing the convection speed of the liquid between the heat sink, the central tube and the protective shell, so that the temperature of each part of the device is kept almost the same, reducing the temperature stratification, ensuring the stable operation of the device and preventing local damage.

[0019] The device is provided with a baffle so that the wind blown by the fan can be gathered, so that the wind blown by the fan can better exchange heat with the heat dissipation components and reduce wind diffusion. The baffle can also protect the heat dissipation components to prevent damage caused by long-term wind and sun exposure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The utility model is a structural schematic diagram of an explosion-proof submersible electric pump transformer specially used for oil fields.

[0021] Figure 2 It is a schematic structural diagram of the protective shell of the utility model after being cut away from the first viewing angle.

[0022] Figure 3 It is a schematic structural diagram of the second viewing angle of the protective shell in the utility model after being cut.

[0023] Figure 4 It is a structural schematic diagram of the heat dissipation component in the utility model.

[0024] Figure 5 It is a structural schematic diagram of the central tube in the utility model.

[0025] Figure 6It is a schematic diagram of the structure of the heat sink in the utility model.

[0026] Figure 7 It is a structural schematic diagram of the rotating component in the utility model.

[0027] In the figure: 1. protective shell; 2. heat dissipation component; 3. high-pressure interface; 4. baffle; 5. oil storage tank; 6. oil pump; 11. circulation slot; 12. fan; 13. protection plate; 14. triangular support block; 21. center tube; 22. heat sink; 23. rotating component; 24. connecting groove; 31. low-pressure interface; 32. high-voltage winding; 33. low-voltage winding; 51. connecting pipe; 61. liquid outlet pipe; 62. liquid inlet pipe; 211. round head; 221. sealing ring; 231. sliding ring; 232. connecting block; 233. sealing rubber ring; 234. sealing rubber block; 235. circulation gap. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] The utility model provides Figure 1-Figure 7The oilfield explosion-proof submersible electric pump transformer shown in the figure comprises a protective shell 1, both sides of the protective shell 1 are provided with flow slots 11, both sides of the protective shell 1 corresponding to the flow slots 11 are fixedly installed with heat dissipation components 2, the heat dissipation components 2 comprise a central tube 21, the central tube 21 is connected with the flow slots 11, the upper and lower sides of the central tube 21 are provided with a plurality of evenly distributed connection slots 24, the outer part of the central tube 21 is rotatably installed with a plurality of heat sinks 22 corresponding to the connection slots 24, the inner part of the central tube 21 is rotatably installed with a plurality of rotating components 23 corresponding to the connection slots 24, the rotating component 23 comprises two sliding rings 231, two flow gaps 235 are provided between the two sliding rings 231, the sliding ring 231 is tightly fitted to the inner surface of the central tube 21, and one end of the sliding ring 231 is fixedly installed A connecting block 232 is provided, and the connecting block 232 is slidably clamped in the inside of the connecting groove 24. The connecting block 232 is fixedly installed in the middle of the heat sink 22. A plurality of sealing rubber rings 233 corresponding to the rotating component 23 are provided inside the central tube 21. The sealing rubber ring 233 is fixedly installed on two sliding rings 231. A sealing rubber block 234 is fixedly installed at one end of the sliding ring 231 away from the connecting block 232. The sealing rubber block 234 fits tightly with the inner wall of the central tube 21. Sealing rings 221 are fixedly installed in the middle of both sides of the heat sink 22. The sealing rings 221 are rotatably installed on the outer surface of the central tube 21. An oil storage tank 5 is provided above one side of the protective shell 1. A plurality of connecting pipes 51 are fixedly connected to the bottom end of the oil storage tank 5. The connecting pipes 51 are fixedly installed on the protective shell 1, and the connecting pipes 51 are communicated with the protective shell 1.

[0030] When using a submersible electric pump in an oil field, it is necessary to convert the external high voltage electricity into a voltage that can be used by the electric pump and the electric pump controller. Therefore, a transformer is needed to convert the high voltage into a low voltage. However, the transformer in the oil field environment will encounter more different situations when used compared to the transformer in the ordinary environment. Because the oil field environment is prone to produce flammable and explosive gases, and there will be more pollutants and vaporized oil suspended in the air at the oil field location. If the transformer working in this environment generates electric sparks, it is easy to ignite the flammable and explosive gases and cause major safety accidents. Therefore, it is necessary to use explosion-proof and spark-proof transformers. The oil-immersed transformer in the prior art has good explosion-proof ability, and because the winding is immersed in insulating oil, it is difficult to generate an arc, and the winding is isolated from the air and will not contact with flammable and explosive gases, and even if an arc occurs, it will not ignite the flammable and explosive gases. However, the traditional oil-immersed transformer has many dense heat dissipation blades. When used in an oil field environment, viscous liquefied oil is easily generated between the heat dissipation blades. Because the gap between the heat dissipation blades is small, workers cannot clean it, and the viscous substance adheres to the heat dissipation blades, which will cause the thermal conductivity of the heat dissipation blades to deteriorate, and the transformer is easily damaged after long-term use.

[0031] Therefore, in order to solve the above-mentioned shortcomings, the present device is provided with a heat dissipation component 2. When in use, the interior of the protective housing 1 and the oil storage tank 5 are filled with insulating oil. The insulating oil can be, but is not limited to, mineral oil transformer oil. At this time, the insulating oil will fill the central tube 21 and the heat sink 22. After being used for a period of time, it does not need to be disassembled. It only needs to rotate the heat sink 22. At this time, the heat sink 22 drives the connecting block 232 and the sliding ring 231 to rotate. The heat sink 22 is rotated 90°. At this time, the sliding ring 231 rotates to block the connecting groove 24. During the rotation of the heat sink 22, the sealing rubber ring 233 and the sealing rubber block 234 can prevent the oil from penetrating into the space between the sliding ring 231 and the central tube 21 and causing the oil to Leakage, when the heat sink 22 rotates, the sealing ring 221 can further prevent the oil inside the heat sink 22 from leaking. The heat sink 22 that needs to be cleaned can be rotated 90°, and then cleaned with a cleaning device. Accurate and convenient cleaning can be achieved without disassembly. In addition, by providing a rotating component 23, the heat sink 22 can be prevented from being damaged due to changes in internal pressure when it rotates, thereby ensuring that the internal pressure change of the heat sink 22 is small when it rotates. If the heat sink 22 is accidentally damaged during cleaning, the sliding ring 231 will block the connecting groove 24 at this time. Even if the heat sink 22 is damaged, the oil will not leak, thereby ensuring the safety of the device operation.

[0032] After cleaning, it is only necessary to rotate the heat sink 22 90° in the opposite direction to its original position. At this time, the flow gap 235 is connected with the connecting groove 24, so that the connection between the heat sink 22 and the central tube 21 can be restored, which facilitates the convection of the oil. The oil storage tank 5 can compensate for the loss of insulating oil inside the device.

[0033] Two mutually symmetrical protective plates 13 are fixedly installed in the middle position inside the protective shell 1, and two mutually symmetrical oil pumps 6 are fixedly installed in the middle position inside the protective shell 1. The oil pump 6 is located between the two protective plates 13. The output end of the oil pump 6 is fixedly connected to a liquid outlet pipe 61, and the input end of the oil pump 6 is fixedly connected to a liquid inlet pipe 62. The end of the center tube 21 away from the protective shell 1 has a round head 211, and the liquid outlet pipe 61 extends to the round head 211.

[0034] Because the liquid volume inside the central tube 21 is much smaller than the liquid volume inside the protective shell 1, when the temperature inside the protective shell 1 rises during actual operation, the liquid convection speed may not keep up with the rising speed of the oil inside the protective shell 1, which may cause the oil temperature inside the central tube 21 and the heat sink 22 to be lower than the oil temperature inside the protective shell 1, resulting in stratification of the oil temperature inside the device. The temperature of some oil is too high while the temperature of some oil is too low, which may lead to untimely temperature feedback and thus damage to the device. Therefore, the device is provided with two oil pumps 6. When the oil pump 6 is actually used, the oil pump 6 works by feeding liquid. The tube 62 absorbs oil from the inside of the protective shell 1 and then discharges it to the position of the central tube 21 through the liquid outlet pipe 61. Because the round head 211 is spherical, the liquid driven by the oil pump 6 impacts the round head 211 and returns to the inside of the protective shell 1 through the central tube 21, thereby increasing the oil flow rate inside the central tube 21, thereby causing the pressure inside the central tube 21 to decrease, and then the oil inside the heat sink 22 will be sucked away, thereby increasing the convection speed of the liquid between the heat sink 22, the central tube 21, and the protective shell 1, so that the temperature of each part of the device is kept almost consistent, reducing the occurrence of temperature stratification, ensuring stable operation of the device, and preventing local damage.

[0035] Baffles 4 are hinged on the upper ends of both sides corresponding to the heat dissipation component 2, two symmetrical triangular support blocks 14 are fixedly installed on both sides corresponding to the protective shell 1 and the baffle 4, fans 12 are fixedly installed on the ends of both sides corresponding to the heat dissipation component 2, a plurality of high-voltage interfaces 3 and low-voltage interfaces 31 are fixedly installed on the upper surface of the protective shell 1, a plurality of high-voltage windings 32 corresponding to the high-voltage interfaces 3 are fixedly installed inside the protective shell 1, a plurality of low-voltage windings 33 corresponding to the low-voltage interfaces 31 are fixedly installed inside the protective shell 1, and the outsides of the high-voltage windings 32 and the low-voltage windings 33 are both covered with protective shells.

[0036] During operation, the baffle 4 is rotated to a horizontal position. At this time, the baffle 4 can shield the heat dissipation component 2 from rain and sun, and can gather the wind blown by the fan 12 to prevent the wind blown by the fan 12 from diffusing, thereby improving the air flow at the position of the heat dissipation component 2 and increasing the heat exchange rate between the heat dissipation component 2 and the air. When the heat sink 22 needs to be cleaned, the baffle 4 needs to be rotated and lifted to clean the heat dissipation component 2.

[0037] Working principle: By setting the heat dissipation component 2, the interior of the protective housing 1 and the oil storage tank 5 are filled with insulating oil when in use. The insulating oil can be but not limited to mineral oil transformer oil. At this time, the insulating oil will fill the central tube 21 and the heat sink 22. After using for a period of time, there is no need to disassemble it. You only need to rotate the heat sink 22. At this time, the heat sink 22 drives the connecting block 232 and the sliding ring 231 to rotate. The heat sink 22 is rotated 90°. At this time, the sliding ring 231 rotates to block the connecting groove 24. During the rotation of the heat sink 22, the sealing rubber ring 233 and the sealing rubber block 234 can prevent the oil from The oil seeps into the space between the sliding ring 231 and the center tube 21, causing oil leakage. When the heat sink 22 rotates, the sealing ring 221 can further prevent the oil leakage inside the heat sink 22. The heat sink 22 that needs to be cleaned is rotated 90°, and then it can be cleaned using a cleaning device. After cleaning, it is only necessary to rotate the heat sink 22 in the opposite direction 90° to its original position. At this time, the flow gap 235 is connected with the connecting groove 24, and then the connection between the heat sink 22 and the center tube 21 can be restored, which facilitates the convection of the oil. The oil storage tank 5 can compensate for the loss of insulating oil inside the device.

[0038] In actual operation, when the temperature inside the protective shell 1 rises, the speed of liquid convection may not keep up with the speed of oil rising inside the protective shell 1, which may cause the oil temperature inside the central tube 21 and the heat sink 22 to be lower than the oil temperature inside the protective shell 1, resulting in stratification of the oil temperature inside the device. Some oil temperatures are too high while others are too low, which may lead to untimely temperature feedback and damage to the device. Therefore, the device is provided with two oil pumps 6. When the oil pump 6 is actually used, the oil pump 6 works. The oil pump 6 draws oil from the inside of the protective shell 1 through the liquid inlet pipe 62, and then discharges it to the position of the central tube 21 through the liquid outlet pipe 61. Because the round head 211 is spherical, the liquid driven by the oil pump 6 impacts the round head 211 and returns to the inside of the protective shell 1 through the central tube 21, thereby increasing the oil flow rate inside the central tube 21, thereby reducing the pressure inside the central tube 21, and then the oil inside the heat sink 22 will be sucked away, thereby increasing the convection speed of the liquid between the heat sink 22, the central tube 21, and the protective shell 1.

[0039] During operation, the baffle 4 is rotated to a horizontal position. At this time, the baffle 4 can shield the heat dissipation component 2 from rain and sun, and can gather the wind blown by the fan 12 to prevent the wind blown by the fan 12 from diffusing, thereby improving the air flow at the position of the heat dissipation component 2 and increasing the heat exchange rate between the heat dissipation component 2 and the air. When the heat sink 22 needs to be cleaned, the baffle 4 needs to be rotated and lifted to clean the heat dissipation component 2.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An explosion-proof submersible electric pump transformer for oil fields, comprising a protective housing (1), characterized in that: Both sides of the protective shell (1) are provided with circulation slots (11), and both sides of the protective shell (1) corresponding to the circulation slots (11) are fixedly mounted with heat dissipation components (2), and the heat dissipation components (2) include a central tube (21), and the central tube (21) is connected to the circulation slots (11), and both upper and lower sides of the central tube (21) are provided with a plurality of evenly distributed connection slots (24), and a plurality of heat dissipation fins (22) corresponding to the connection slots (24) are rotatably mounted on the outside of the central tube (21), and a plurality of rotating components (23) corresponding to the connection slots (24) are rotatably mounted on the inside of the central tube (21), and when the heat dissipation fins (22) rotate, the rotating components (23) are used to change the state of oil inside the heat dissipation fins (22).

2. The oilfield explosion-proof submersible electric pump transformer according to claim 1, characterized in that: The rotating component (23) comprises two sliding rings (231), two flow gaps (235) are provided between the two sliding rings (231), the sliding rings (231) are tightly fitted on the inner surface of the central tube (21), a connecting block (232) is fixedly installed on one end of the sliding ring (231), the connecting block (232) is slidably clamped inside the connecting groove (24), the connecting block (232) is fixedly installed in the middle of the heat sink (22), and the interior of the central tube (21) is provided with a plurality of A sealing rubber ring (233) corresponding to the rotating component (23), the sealing rubber ring (233) is fixedly mounted on the two sliding rings (231), a sealing rubber block (234) is fixedly mounted on one end of the sliding ring (231) away from the connecting block (232), the sealing rubber block (234) is tightly fitted with the inner wall of the central tube (21), and sealing rings (221) are fixedly mounted on the middle of both sides of the heat sink (22), and the sealing rings (221) are rotatably mounted on the outer surface of the central tube (21).

3. The special explosion-proof submersible electric pump transformer for oil fields according to claim 1 is characterized in that: Two mutually symmetrical protective plates (13) are fixedly mounted in the middle of the interior of the protective housing (1); two mutually symmetrical oil pumps (6) are fixedly mounted in the middle of the interior of the protective housing (1); the oil pump (6) is located between the two protective plates (13); an output end of the oil pump (6) is fixedly connected to a liquid outlet pipe (61); and an input end of the oil pump (6) is fixedly connected to a liquid inlet pipe (62).

4. The special explosion-proof submersible electric pump transformer for oil fields according to claim 3 is characterized in that: One end of the central tube (21) away from the protective shell (1) has a round head (211), and the liquid outlet tube (61) extends to the round head (211).

5. The special explosion-proof submersible electric pump transformer for oil fields according to claim 1, characterized in that: The upper ends of both sides of the protective shell (1) and the heat dissipation component (2) are hingedly connected with baffles (4), and two mutually symmetrical triangular support blocks (14) are fixedly mounted on both sides of the protective shell (1) and the baffles (4).

6. The special explosion-proof submersible electric pump transformer for oil fields according to claim 1, characterized in that: Fans (12) are fixedly mounted on both side ends of the protective housing (1) corresponding to the heat dissipation component (2).

7. The special explosion-proof submersible electric pump transformer for oil fields according to claim 1, characterized in that: A plurality of high-voltage interfaces (3) and low-voltage interfaces (31) are fixedly mounted on the upper surface of the protective shell (1); a plurality of high-voltage windings (32) corresponding to the high-voltage interfaces (3) are fixedly mounted inside the protective shell (1); a plurality of low-voltage windings (33) corresponding to the low-voltage interfaces (31) are fixedly mounted inside the protective shell (1); and the high-voltage windings (32) and the low-voltage windings (33) are both sheathed with protective shells on their exteriors.

8. The special explosion-proof submersible electric pump transformer for oil fields according to claim 1, characterized in that: An oil storage tank (5) is provided above one side of the protective shell (1); a plurality of connecting pipes (51) are fixedly connected to the bottom end of the oil storage tank (5); the connecting pipes (51) are fixedly mounted on the protective shell (1); and the connecting pipes (51) are in communication with the protective shell (1).

Images