Transformer oil replenishing device

Abstract

The present invention relates to the technical field of transformers, and more particularly to a transformer oil filling device, comprising an oil tank, an internal gear pump, and an internal oil pipe. The oil tank is provided with an oil outlet joint, the internal gear pump is installed inside the oil tank, the oil inlet of the internal gear pump is located at the bottom of the oil tank, the two ends of the internal oil pipe are respectively connected to the oil outlet of the internal gear pump and the oil outlet joint, the oil tank is provided with an oil drain joint for pouring out excess oil, the oil drain joint is arranged on the bottom or side of the oil tank, the horizontal height of the oil drain joint is less than the horizontal height of the oil outlet joint, the oil outlet joint is connected to an oil filling pipe via a connecting clamp, the oil filling pipe is provided with a control valve, and the end of the oil filling pipe is provided with a compression-type oil extraction bottle and a barb structure. The device is easy to use, can be easily inserted into the transformer oil tank and prevented from falling out, and can adjust the filling speed and effectively prevent oil overflow.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and in particular to a transformer oil replenishing device. Background Art

[0002] Transformer oil is an important element in the operation of the transformer. Transformer oil can act as an insulator, with a much higher insulation strength than air. It can also protect components from moisture erosion. At the same time, transformer oil has a high specific heat and plays a heat dissipation role. Its good thermal conductivity can play an arc extinguishing role on the transformer.

[0003] For example, application number: CN201420417036.5 discloses a transformer oil replenishing device, including an oil tank, an internal gear pump and an inner oil pipe. The oil tank is provided with a main through hole for the inner oil pipe to pass through. The internal gear pump is installed inside the oil tank. The oil inlet of the internal gear pump is located at the bottom of the oil tank. The two ends of the inner oil pipe are respectively connected to the oil outlet of the internal gear pump and the main through hole. The oil tank is provided with a secondary through hole for pouring out the remaining oil. The secondary through hole is arranged on the bottom or side of the oil tank. The horizontal height of the secondary through hole is smaller than the horizontal height of the main through hole. The main through hole is connected to the outside of the oil tank with an oil replenishing pipe.

[0004] The above application is low in cost and suitable for field workers to carry, the oil pipe can be replaced, and the remaining oil can be easily poured out. However, it still has the following shortcomings: First, it is not convenient to use. When inserting the oil inlet pipe into the transformer oil tank, the above application needs to hold the oil inlet pipe with one hand to prevent the oil inlet pipe from being separated from the transformer oil tank, which reduces the convenience of use during use; Second, the structure is not sound and reasonable enough. When using, the above application cannot control the speed of pouring oil, which easily leads to oil overflow, and when the filling is overfilled, the oil at the mouth of the transformer oil tank cannot be absorbed, resulting in oil overflow when the cap is screwed. Summary of the Invention

[0005] The invention provides a transformer oil filling device, which is easy to use, can be conveniently inserted into the transformer oil tank and prevented from falling out, and can adjust the filling speed and effectively prevent oil overflow.

[0006] The technical solutions of the present invention are as follows:

[0007] A transformer oil replenishing device includes an oil tank, an internal gear pump and an inner oil pipe. The oil tank is provided with an oil outlet joint. The internal gear pump is installed inside the oil tank. The oil inlet of the internal gear pump is located at the bottom of the oil tank. Both ends of the inner oil pipe are respectively connected to the oil outlet of the internal gear pump and the oil outlet joint. The oil tank is provided with an oil drain joint for pouring out residual oil. The oil drain joint is arranged on the bottom or side of the oil tank. The horizontal height of the oil drain joint is smaller than the horizontal height of the oil outlet joint. An oil replenishing pipe is connected to the oil outlet joint via a connecting clamp. The oil replenishing pipe is provided with a control valve. The end of the oil replenishing pipe is provided with a compression oil extraction bottle and a barb structure.

[0008] The oil filling pipe is provided with a control valve, so when in use, on the one hand, the filling can be quickly stopped by closing the control valve, and the control valve can also adjust the filling speed; on the other hand, the compression oil extraction bottle is arranged at the end of the oil filling pipe, so after closing the control valve, the compression oil extraction bottle only needs to absorb the oil in the oil filling pipe in front of the control valve, thereby appropriately reducing the volume of the compression oil extraction bottle. During use, when the filling is overfilled, the compression oil extraction bottle can absorb the oil at the front end of the oil filling pipe and the oil filling port of the transformer tank to prevent leakage due to excessive oil when tightening the transformer tank cover; moreover, the oil filling pipe is conveniently connected to the oil filling port of the transformer tank through a barb structure, which is convenient and quick, and its barb structure effectively prevents the oil filling pipe from being separated from the transformer tank during filling.

[0009] Furthermore, a connecting pipe is welded to the oil supply pipe, communicating with the oil supply pipe. The inlet of the compression oil pumping bottle is plugged into the connecting pipe and secured with bolts. The compression oil pumping bottle absorbs oil from the oil supply pipe through the connecting pipe. To absorb oil, the compression oil pumping bottle only needs to be squeezed.

[0010] Furthermore, the barb structure is provided on the outer wall of the oil supply pipe and is located on the side of the connecting pipe away from the oil outlet joint. The barb structure includes a hook fixing seat, which is slidably connected to the oil supply pipe, and the hook fixing seat is rotatably connected with four hooks in a circular array. A retaining ring is fixedly connected to the oil supply pipe, and the hook portions of the four hooks are in contact with the retaining ring, and an adjusting nut is threadedly connected to the oil supply pipe for adjusting the position of the hook fixing seat.

[0011] When the oil filling pipe is inserted into the oil filling port of the transformer oil tank, the hook fixing seat can be pushed to slide toward the side of the retaining ring by screwing the adjusting nut. The hook portions of the four hooks on the hook fixing seat are propped up and unfolded due to the action of the retaining ring. At this time, the hook portions of the hooks can be hooked on the oil tank port to prevent the oil filling pipe from being separated from the transformer oil tank during filling.

[0012] Furthermore, a spring is sleeved on the outer wall of the oil supply pipe between the hook fixing seat and the retaining ring. After loosening the adjusting nut, the hook fixing seat and the hook can automatically return to their original positions under the elastic force of the spring.

[0013] Furthermore, the retaining ring is a ring magnet, so the retaining ring can absorb the four hooks to prevent the lower hook from sagging and affecting the insertion of the oil supply pipe into the transformer tank.

[0014] Furthermore, the oil drain joint is provided with a sealing cover. Therefore, when the oil drain joint is carried, the sealing cover can be used to seal the oil drain joint to prevent dust from entering.

[0015] Furthermore, an oil filling port is provided on the top of the oil tank, and a cover is provided on the oil filling port. Transformer oil can be added to the oil tank through the oil filling port.

[0016] Furthermore, a crank is provided on the top of the oil tank, one end of which is provided with a connecting rod, the other end of which extends into the oil tank via a bearing and is in transmission connection with the drive shaft of the internal gear pump. When oil replenishment is required, the crank is manually rotated, which drives the internal gear pump via the connecting rod, thereby causing the transformer oil pumped by the internal gear pump to replenish the transformer oil tank through the oil replenishment pipe. Of course, the oil can be pumped out of the transformer oil tank by rotating the crank in the opposite direction.

[0017] The beneficial effects of the present invention are:

[0018] The present invention improves the oil filling pipe structure. Before filling oil, the oil filling pipe is first inserted into the transformer oil tank, and the adjusting nut on the barb structure is rotated. The hook is propped up under the action of the retaining ring. At this time, the oil filling pipe can be hooked on the oil filling port of the transformer oil tank through the hook portion, so as to prevent the oil filling pipe from being separated from the transformer oil tank during the filling process; when filling oil, on the one hand, the filling can be quickly stopped by closing the control valve, and the control valve can also adjust the filling speed; on the other hand, after closing the control valve, the compression oil extraction bottle is pressed, and the compression oil extraction bottle absorbs the oil in the oil filling pipe in front of the control valve through the connecting pipe, and can absorb the oil at the front end of the oil filling pipe and the oil filling port of the transformer oil tank, so as to prevent the oil from leaking due to excessive oil when the transformer oil tank cover is screwed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the axial structure of the present invention;

[0020] Figure 2 This is an axially enlarged structural diagram of the oil supply pipe;

[0021] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure at A in the middle;

[0022] In the figure: 1-box, 2-oil outlet joint, 3-oil drain joint, 4-oil supply pipe, 5-control valve, 6-connecting pipe, 7-compression oil extraction bottle, 8-hook fixing seat, 9-hook, 10-retaining ring, 11-adjusting nut, 12-spring, 13-oil filling port, 14-crank handle. DETAILED DESCRIPTION

[0023] The drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate the embodiments, some components in the drawings may be omitted, enlarged, or reduced in size, and do not represent actual product dimensions. Those skilled in the art will understand that some well-known structures and their descriptions may be omitted from the drawings. The positional relationships depicted in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0024] Example 1:

[0025] like Figure 1 As shown in FIG. 3 , a transformer oil replenishing device comprises an oil tank 1, an internal gear pump and an inner oil pipe. An oil outlet joint 2 is provided on the oil tank 1. The internal gear pump is installed inside the oil tank 1. The oil inlet of the internal gear pump is located at the bottom of the oil tank 1. Both ends of the inner oil pipe are connected to the oil outlet of the internal gear pump and the oil outlet joint 2 respectively. An oil drain joint 3 for pouring out the remaining oil is provided on the oil tank 1. The oil drain joint 3 is arranged on the bottom or side of the oil tank 1. The horizontal height of the oil drain joint 3 is less than that of the oil outlet joint 2. An oil replenishing pipe 4 is connected to the oil outlet joint 2 through a connecting clamp. A control valve 5 is provided near the head end of the oil replenishing pipe 4. The oil replenishing pipe 4 is at A connecting pipe 6 is welded to the front side of the control valve 5, and the connecting pipe 6 is connected to the oil supply pipe 4. A compression oil extraction bottle 7 is provided at the other end of the connecting pipe 6. The inlet of the compression oil extraction bottle 7 is plugged into the connecting pipe 6 and locked with bolts. A barb structure is provided on the front side of the connecting pipe 6. The barb structure includes a hook fixing seat 8, which is slidably connected to the oil supply pipe 4, and four hooks 9 are rotatably connected to the hook fixing seat 8 in a circular array. A retaining ring 10 is fixedly connected to the oil supply pipe 4, and the hook portions of the four hooks 9 are in contact with the retaining ring 10, and an adjusting nut 11 is threadedly connected to the oil supply pipe 4 for adjusting the position of the hook fixing seat 8.

[0026] The oil filling pipe 4 is provided with a control valve 5. Therefore, when in use, on the one hand, the filling can be quickly stopped by closing the control valve 5, and the control valve 5 can also adjust the filling speed. On the other hand, the compression type oil pumping bottle 7 is arranged at the end of the oil filling pipe 4. Then, after closing the control valve 5, the compression type oil pumping bottle 7 only needs to absorb the oil in the oil filling pipe 4 in front of the control valve 5, thereby appropriately reducing the volume of the compression type oil pumping bottle 7. When in use, when the filling is overfilled, the compression type oil pumping bottle 7 can fill the front end of the oil filling pipe 4 and the transformer tank filling The oil at the oil port is absorbed to prevent leakage due to excessive oil when the transformer tank cap is screwed; moreover, the oil filling pipe 4 can be quickly plugged into the oil filling port of the transformer tank through the barb structure. When the oil filling pipe 4 is inserted into the oil filling port of the transformer tank, the hook fixing seat 8 can be pushed to slide toward the side of the retaining ring 10 by screwing the adjusting nut 11. The hook portions of the four hooks 9 on the hook fixing seat 8 are propped up and unfolded due to the action of the retaining ring 10. At this time, the hook portions of the hooks 9 can be hooked on the tank port to prevent the oil filling pipe 4 from being separated from the transformer tank during filling.

[0027] In this embodiment, the compression type oil extraction bottle 7 absorbs the oil in the oil supply pipe 4 through the connecting pipe 6. When absorbing, the compression type oil extraction bottle 7 only needs to be squeezed to absorb.

[0028] In this embodiment, a spring 12 is sleeved on the outer wall of the oil supply pipe 4 between the hook fixing seat 8 and the retaining ring 10, so after loosening the adjusting nut 11, the hook fixing seat 8 and the hook 9 can automatically return to their original positions under the elastic force of the spring 12.

[0029] In this embodiment, the retaining ring 10 is a ring magnet, so the retaining ring 10 can absorb the four hooks 9 to prevent the lower hook 9 from sagging and affecting the insertion of the oil supply pipe 4 into the transformer tank.

[0030] In this embodiment, the oil drain joint 3 is provided with a sealing cover, so when the device is carried, the sealing cover can be used to seal the oil drain joint 3 to prevent dust from entering.

[0031] In this embodiment, an oil filling port is provided on the top of the oil tank 1 , and the oil filling port 13 is provided with a cover. Transformer oil can be added to the oil tank 1 through the oil filling port 13 , and the cover seals the oil filling port 13 to prevent dust from entering.

[0032] In this embodiment, a crank handle 14 is provided at the top of the oil tank 1. A connecting rod is provided at one end of the crank handle 14. The other end of the connecting rod extends through a bearing into the oil tank 1 and is in driving connection with the drive shaft of the internal gear pump. When oil replenishment is required, crank handle 14 is manually rotated. This, via the connecting rod, drives the internal gear pump, which in turn causes transformer oil pumped by the internal gear pump to flow through the oil replenishment pipe 4 and into the transformer tank. Of course, rotating crank handle 14 in the opposite direction will also allow the transformer tank to be pumped out of the oil tank.

[0033] The specific usage and function of this embodiment are as follows:

[0034] Before refilling the oil, first fill the oil tank 1 with transformer oil through the oil filling port 13 on the oil tank 1, then cover the oil filling port 13 to seal it, and then insert the end of the oil filling pipe 4 into the oil filling port of the transformer oil tank, turn the adjusting nut 11 on the barb structure to slide the hook fixing seat 8 toward the side of the retaining ring 10, and the hook portion of the hook 9 is propped up by the retaining ring 10. At this time, the oil filling pipe 4 can be hooked on the oil filling port of the transformer oil tank through the hook portion of the hook 9, preventing the oil filling pipe 4 from being separated from the transformer oil tank during the filling process; when refilling the oil, manually rotate the crank 14, and the crank 14 is connected to the connecting rod. The internal gear pump can be driven to rotate, so that the transformer oil extracted by the internal gear pump flows to the oil filling pipe 4 through the oil outlet joint 2 and then to the transformer oil tank for oil replenishment. The filling can be quickly stopped by closing the control valve 5, and the control valve 5 can also adjust the filling speed. After the oil replenishment is completed, the control valve 5 is closed and the compression oil extraction bottle 7 is pressed. The compression oil extraction bottle 7 absorbs the oil in the oil filling pipe 4 on the front side of the control valve 5 through the connecting pipe 6, and can absorb the oil at the front end of the oil filling pipe 4 and the oil filling port of the transformer tank, so as to prevent oil leakage due to excessive oil when the transformer tank cover is screwed.

[0035] When the oil replenishing device is no longer used, the sealing cover of the oil drain joint 3 is opened to drain the remaining oil in the oil tank 1 , and the sealing cover is replaced after draining.

[0036] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A transformer oil replenishing device, comprising an oil tank, an internal gear pump and an internal oil pipe, wherein the oil tank is provided with an oil outlet joint, the internal gear pump is installed inside the oil tank, the oil inlet of the internal gear pump is located at the bottom of the oil tank, the two ends of the internal oil pipe are respectively connected to the oil outlet of the internal gear pump and the oil outlet joint, an oil drain joint for pouring out the remaining oil is provided on the oil tank, the oil drain joint is arranged on the bottom or side of the oil tank, and the horizontal height of the oil drain joint is less than the horizontal height of the oil outlet joint, characterized in that: The oil outlet joint is connected to an oil supply pipe via a connecting clamp, the oil supply pipe is provided with a control valve, and the end of the oil supply pipe is provided with a compression type oil pumping bottle and a barb structure; A connecting pipe is welded on the oil supply pipe, the connecting pipe is connected to the oil supply pipe, and the inlet of the compression oil pumping bottle is plugged into the connecting pipe and locked with bolts; The barb structure is provided on the outer wall of the oil supply pipe and is located on the side of the connecting pipe away from the oil outlet joint. The barb structure includes a hook fixing seat, the hook fixing seat is slidably connected to the oil supply pipe, and four hooks are rotatably connected to the hook fixing seat in an annular array. A retaining ring is fixedly connected to the oil supply pipe, and the hook portions of the four hooks are in contact with the retaining ring. An adjusting nut is threadedly connected to the oil supply pipe for adjusting the position of the hook fixing seat. A spring is sleeved on the outer wall of the oil supply pipe between the hook fixing seat and the retaining ring; The oil drain joint is provided with a sealing cover.

2. A transformer oil replenishing device according to claim 1, characterized in that: The retaining ring is a ring magnet.

3. The transformer oil replenishing device according to claim 1, characterized in that: An oil filling port is provided on the top of the oil tank, and a cover is provided on the oil filling port.

4. The transformer oil replenishing device according to claim 1, characterized in that: A crank is provided on the top of the oil tank, one end of the crank is provided with a connecting rod, and the other end of the connecting rod penetrates into the oil tank through a bearing and is transmission-connected to the driving shaft of the internal gear pump.

Images