Oil supplementing structure of oil-immersed transformer

Abstract

The utility model provides an oil recharging structure of an oil-immersed transformer, which belongs to the technical field of oil-immersed transformers and comprises an oil tank and an oil pump arranged at one end of the oil tank, and further comprises an oil recharging mechanism used for recharging oil to the oil-immersed transformer, and the oil recharging mechanism comprises a connector arranged at the end of an oil outlet pipe of the oil pump. The end of an inner cavity of the connector is rotationally connected with an oil injection head, the outer arc face of the oil injection head is in threaded connection with an inner threaded cylinder, a plurality of evenly-distributed mounting bases are arranged at the lower end of the outer arc face of the inner threaded cylinder, a rotating wheel is rotationally connected into each mounting base, and clamping plates are arranged at the lower ends of the outer arc faces of the rotating wheels. A driving assembly used for driving the multiple clamping plates to swing synchronously is further arranged outside the inner threaded cylinder. Through the oil supplementing structure, oil pipe connection can be stably maintained without manual supporting, connector falling caused by oil pressure fluctuation is effectively prevented, and safety and efficiency of continuous oil supplementing operation are remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to oil -immersed transformer technical field, concretely relates to a kind of oil supplement structure of oil -immersed transformer. BACKGROUND

[0002] Oil-immersed transformer adopts oil medium to realize winding insulation and heat dissipation function, and is maintained operating temperature by oil-immersed self-cooling, air cooling, water cooling and forced oil circulation cooling mode, but oil liquid gradually wears due to volatilization, leakage and other factors in long-term use, and needs to be supplemented by special oil supplement structure of oil-immersed transformer.

[0003] Traditional oil supplement device is composed of oil tank, oil pump and oil injection head, and operator needs to continuously hold oil injection head and insert into oil supplement pipe and keep fixed posture until oil supplement is completed, which can realize basic function, but has obvious limitations: manual continuous support not only increases labor intensity, but also causes joint to be easily loosened when oil pressure fluctuates due to lack of mechanical locking mechanism, which has risk of oil leakage and low operation efficiency, especially in continuous oil supplement operation scene, operation stability and safety are difficult to guarantee. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model provides an oil supplement structure of oil-immersed transformer, which can stably maintain oil pipe connection without manual support through oil supplement structure, effectively prevent joint from falling off caused by oil pressure fluctuation, and significantly improve safety and efficiency of continuous oil supplement operation.

[0005] To solve the above technical problems, the utility model provides an oil supplement structure of oil-immersed transformer, which comprises an oil tank and an oil pump arranged at one end of the oil tank, and further comprises an oil supplement mechanism for supplementing oil to the oil-immersed transformer, the oil supplement mechanism comprising a connecting head arranged at the end of the oil pump outlet pipe, the inner cavity end of the connecting head being rotationally connected with an oil injection head, the outer arc surface of the oil injection head being threadedly connected with an internal thread cylinder, the outer arc surface lower end of the internal thread cylinder being provided with a plurality of mounting seats uniformly distributed, each mounting seat being rotationally connected with a rotating wheel, the outer arc surface lower end of the rotating wheel being provided with a clamping plate, and the external part of the internal thread cylinder being further provided with a driving assembly for driving the plurality of clamping plates to synchronously swing, so that the oil pipe connection can be stably maintained without manual support during oil supplement process, joint falling off caused by oil pressure fluctuation is effectively prevented, and safety and efficiency of continuous oil supplement operation are significantly improved.

[0006] The driving assembly comprises a sliding cover slidingly connected to the outer arc surface of the internal thread cylinder, the inner arc surface of the sliding cover is provided with a rack plate near each rotating wheel, and the outer arc surface of each rotating wheel is provided with an arc-shaped toothed plate, which is meshingly connected with the adjacent rack plate on the same side, so that the clamping plates 305 can be synchronously driven to close or open.

[0007] Further comprising a resilient assembly for providing a resilient force for the sliding cover, the resilient assembly comprising a fixed ring arranged at an outer arc surface of the inner threaded cylinder away from the sliding cover, a spring being arranged between the fixed ring and the sliding cover, and the spring being arranged in the outer movable sleeve of the inner threaded cylinder, i.e., providing a resilient force.

[0008] The lower end of the oil injection head is in inverted conical shape, which can adapt to the oil supplement pipe of different diameters on the transformer.

[0009] The lower end of the oil injection head is in inverted conical shape, which can adapt to the oil supplement pipe of different diameters on the transformer.

[0010] The outer arc surface of the inner threaded cylinder is provided with a plurality of uniformly distributed rectangular sliding grooves, and the sliding cover is provided with a rectangular protrusion in sliding cooperation with each rectangular sliding groove, so as to ensure that the sliding cover 400 can only move axially along the inner threaded cylinder 302.

[0011] The end portions of the clamping plates are inclined downward from inside to outside.

[0012] The beneficial effects of the above technical scheme of the utility model are as follows:

[0013] 1. The driving assembly drives the rotating wheel and the clamping plates to rotate in the mounting seat, so that the plurality of clamping plates are synchronously opened outward, and then the oil supplement pipe is clamped, the clamping plate bottom is designed as a hook, the clamping plate can hook the oil supplement pipe, the inner threaded cylinder is kept stationary, the oil injection head is rotated, the oil injection head is connected with the inner threaded cylinder by threads, the lower end of the oil injection head is inserted into the oil supplement pipe of the oil-immersed transformer, the oil injection head is designed as an inverted cone, which can adapt to the oil supplement pipe of different diameters, the T-shaped portion of the oil supplement pipe is synchronously hooked by the clamping plate when the inverted conical end of the oil injection head is wedge-shaped matched with the oil supplement pipe, the clamping plate is limited to be stationary, the oil injection head applies force to the oil supplement pipe, so that the double effects of sealing connection and mechanical fixation are realized, the oil pipe connection can be stably maintained without manual support during the oil supplement process, the joint falling caused by oil pressure fluctuation is effectively prevented, and the safety and efficiency of continuous oil supplement operation are significantly improved.

[0014] 2, the operator pulls up the sliding cover, at this time the sliding cover overcomes the elastic force of the spring and slides along the threaded cylinder in the axial direction through the rectangular sliding groove, in the process, the rack plate moves synchronously with the sliding cover, and when the rack plate moves, it drives the rotating wheel and the clamping plate to rotate in the mounting seat through the engagement of the arc-shaped tooth plate, so that the plurality of clamping plates are synchronously opened outward, at this time the sliding cover is moved to the oil filling pipe of the oil immersed transformer which needs to be filled with oil, and the oil filling pipe is located between the plurality of clamping plates, at this time the sliding cover is loosened, and the sliding cover is reset under the action of the spring elastic force, and when the sliding cover is reset, the rack plate rotates through the arc-shaped tooth plate to drive the rotating wheel, so that the clamping plate is synchronously closed inward, so that the clamping plate can be synchronously driven to close or open.

[0015] 3, due to the deformable property of the rubber pad, when the oil injection head inverted conical end cooperates with the oil filling pipe, dust can be prevented from entering during oil filling. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a main body structure schematic view of the oil filling structure of the oil immersed transformer.

[0017] Figure 2 It is a sectional view structure schematic view of the utility model.

[0018] Figure 3 It is a plane structure schematic view of the utility model.

[0019] Figure 4 It is an enlarged structure schematic view of A of the utility model.

[0020] The reference signs are explained: 100, oil tank; 200, oil pump; 300, connecting head; 301, oil injection head; 302, internal threaded cylinder; 303, mounting seat; 304, rotating wheel; 305, clamping plate; 400, sliding cover; 401, rack plate; 402, arc-shaped tooth plate; 500, fixed ring; 501, spring; 600, rubber pad. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the following will combine the drawings of the embodiments of the utility model to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer. Figures 1-4 The technical scheme of the embodiments of the utility model is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the utility model, not all the embodiments. Based on the described embodiments of the utility model, all other embodiments obtained by those skilled in the art belong to the scope of protection of the utility model.

[0022] The embodiments provide an oil filling structure of an oil immersed transformer, which comprises an oil tank, an oil pump, a connecting head, an oil injection head, an internal threaded cylinder, a mounting seat, a rotating wheel, a clamping plate, a sliding cover, a rack plate, an arc-shaped tooth plate, a fixed ring, a spring and a rubber pad. Figures 1-4The oil tank 100 and the oil pump 200 are shown, and the oil tank 100 further comprises an oil supplementing mechanism for supplementing oil for the oil immersed transformer, the oil supplementing mechanism comprises a connecting head 300 arranged at the oil outlet pipe end of the oil pump 200, the inner cavity end of the connecting head 300 is rotationally connected with an oil injection head 301, the oil injection head 301 is used for being connected with a transformer oil supplementing port, the axial section of the transformer oil supplementing port is T-shaped, the inner cavity end of the connecting head 300 is provided with a rotating groove for providing rotational support for the oil injection head 301, the outer arc surface of the oil injection head 301 is threadedly connected with an internal thread cylinder 302, the outer arc surface of the oil injection head 301 is provided with external threads for being threadedly connected with the internal thread cylinder 302, the outer arc surface of the lower end of the internal thread cylinder 302 is provided with a plurality of mounting seats 303 which are uniformly distributed, the plurality of mounting seats 303 are annularly and uniformly distributed, each mounting seat 303 is rotationally connected with a rotating wheel 304, each mounting seat 303 is provided with a rotating hole for rotationally supporting the rotating wheel 304, the outer arc surface of the lower end of each rotating wheel 304 is provided with a clamping plate 305, the lower end of the clamping plate 305 is in the shape of a hook, and the external part of the internal thread cylinder 302 is further provided with a driving assembly for driving the plurality of clamping plates 305 to synchronously swing.

[0023] When the oil supplementing operation for the oil immersed transformer is needed, the operator first moves the oil tank 100 and its auxiliary mechanism to the designated oil supplementing site, then drives the rotating wheel 304 and the clamping plate 305 to rotate in the mounting seat 303 through the driving assembly, so that the plurality of clamping plates 305 synchronously open outward, at this time, the oil supplementing pipe is moved to the oil supplementing pipe of the oil immersed transformer which needs to be supplemented, and the oil supplementing pipe is located between the plurality of clamping plates 305, the driving assembly drives the clamping plates 305 to synchronously close inward, so as to clamp the oil supplementing pipe, and the hook-shaped design of the bottom of the clamping plate 305 can hook the oil supplementing pipe, at this time, the internal thread cylinder 302 is kept stationary, the oil injection head 301 is rotated, and due to the threaded connection between the oil injection head 301 and the internal thread cylinder 302, the rotation of the oil injection head 301 makes the lower end of the oil injection head 301 extend into the oil supplementing pipe of the oil immersed transformer, and due to the inverted conical design of the oil injection head 301, it can adapt to oil supplementing pipes with different diameters, when the inverted conical end of the oil injection head 301 is wedged with the oil supplementing pipe, the clamping plates 305 synchronously hook the T-shaped part of the oil supplementing pipe, at this time, the clamping plates 305 are limited to be stationary, and the oil injection head 301 exerts force on the oil supplementing pipe, so as to realize the dual effects of sealing connection and mechanical fixation, thereby stably maintaining the oil pipe connection without manual support during the oil supplementing process, effectively preventing the joint from falling off due to oil pressure fluctuation, and significantly improving the safety and efficiency of continuous oil supplementing operation.

[0024] As Figures 1-4As shown, the driving assembly comprises a sliding cover 400 slidingly connected to the outer arc surface of the inner threaded cylinder 302, the sliding cover 400 is circular and open at the lower end, and the inner arc surface of the sliding cover 400 is provided with a rack plate 401 near each rotating wheel 304, and the outer arc surface of each rotating wheel 304 is provided with an arc-shaped tooth plate 402 which is meshingly connected with the adjacent rack plate 401 on the same side, and the driving assembly further comprises an elastic assembly for providing elastic force for the sliding cover 400, the elastic assembly comprises a fixed ring 500 provided at the end of the outer arc surface of the inner threaded cylinder 302 away from the sliding cover 400, and a spring 501 is arranged between the fixed ring 500 and the sliding cover 400 and movably sleeved with the outer part of the inner threaded cylinder 302.

[0025] The operator pulls the sliding cover 400 upward, at this time the sliding cover 400 overcomes the elastic force of the spring 501 and slides along the threaded cylinder 302 through the rectangular sliding slot, in this process, the rack plate 401 moves synchronously with the sliding cover 400, and when the rack plate 401 moves, it drives the rotating wheel 304 and the clamping plate 305 to rotate in the mounting seat 303 through the arc-shaped tooth plate 402 meshingly connected therewith, so that the plurality of clamping plates 305 are synchronously opened outward, at this time the sliding cover 400 is moved to the oil filling pipe of the oil-immersed transformer which needs to be filled with oil, and the oil filling pipe is located between the plurality of clamping plates 305, at this time the sliding cover 400 is loosened, and the sliding cover 400 is reset under the action of the elastic force of the spring 501, and when the sliding cover 400 is reset, the rack plate 401 drives the rotating wheel 304 to rotate through the arc-shaped tooth plate 402 meshingly connected therewith, so that the clamping plate 305 is synchronously folded inward, so as to synchronously drive the clamping plate 305 to fold or open.

[0026] As shown in Figures 1-4 , the lower end of the oil injection head 301 is in the shape of an inverted cone, and the design of the inverted cone-shaped lower end of the oil injection head 301 can adapt to oil filling pipes of different diameters on the transformer.

[0027] As shown in Figures 1-4 , the lower end of the oil injection head 301 is provided with a rubber pad 600, and due to the deformable property of the rubber pad 600, when the inverted cone-shaped end of the oil injection head 301 cooperates with the oil filling pipe, it can prevent dust from entering during oil filling.

[0028] As shown in Figures 1-4 , the outer arc surface of the inner threaded cylinder 302 is provided with a plurality of uniformly distributed rectangular sliding grooves, and the sliding cover 400 is provided with a rectangular protrusion which slidingly cooperates with each rectangular sliding groove, so as to ensure that the sliding cover 400 can only move axially along the inner threaded cylinder 302.

[0029] As shown in Figures 1-3 , the end portions of the clamping plates 305 are inclined downward from the inside to the outside.

[0030] The working principle of the oil supplementing structure of the oil-immersed transformer is as follows: when oil supplementing operation is needed for the oil-immersed transformer, an operator first moves the oil tank 100 and its accessory mechanism to a designated oil supplementing site, then pulls up the sliding cover 400, at this time the sliding cover 400 overcomes the elastic force of the spring 501 and slides along the threaded cylinder 302 in the axial direction through the rectangular sliding groove, in this process, the rack plate 401 moves synchronously with the sliding cover 400, and when the rack plate 401 moves, the arc-shaped tooth plate 402 connected with the rack plate 401 drives the rotating wheel 304 and the clamping plate 305 to rotate in the mounting seat 303, so that the plurality of clamping plates 305 synchronously open outwards, at this time the oil supplementing pipe is moved to the oil supplementing pipe of the oil-immersed transformer which needs to be supplemented with oil, and the oil supplementing pipe is located between the plurality of clamping plates 305, at this time the sliding cover 400 is loosened, the sliding cover 400 is reset under the action of the elastic force of the spring 501, and when the sliding cover 400 is reset, the rack plate 401 is driven to rotate by the arc-shaped tooth plate 402 connected with the rack plate 401, so that the clamping plate 305 synchronously folds inwards, so as to clamp the oil supplementing pipe, and the design of the hook-shaped bottom of the clamping plate 305 can hook the oil supplementing pipe, at this time the inner threaded cylinder 302 is kept stationary, the oil injection head 301 is rotated, the oil injection head 301 is connected with the inner threaded cylinder 302 in a threaded manner, the rotation of the oil injection head 301 makes the lower end of the oil injection head 301 extend into the oil supplementing pipe of the oil-immersed transformer, due to the design of the inverted cone shape of the oil injection head 301, the oil injection head 301 can adapt to oil supplementing pipes with different hole diameters, when the inverted cone-shaped end of the oil injection head 301 is wedged with the oil supplementing pipe, the clamping plate 305 synchronously hooks the oil supplementing pipe, so as to realize the dual effects of sealing connection and mechanical fixation, so that the oil pipe connection can be stably maintained without manual support during the oil supplementing process, the joint falling caused by oil pressure fluctuation is effectively prevented, and the safety and efficiency of continuous oil supplementing operation are significantly improved, and the deformation characteristics of the rubber pad 600 form a seal between the inverted cone-shaped end of the oil injection head 301 and the oil supplementing pipe, so as to prevent dust from entering during oil supplementing.

[0031] In addition, it should be further pointed out that, in the description of the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication between two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0032] The above is the preferred embodiment of the utility model, and it should be pointed out that, for ordinary skilled persons in the technical field, without departing from the principle of the utility model, a number of improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the utility model.

Claims

1. An oil supplementing structure of an oil-immersed transformer, comprising an oil tank (100) and an oil pump (200) arranged at one end of the oil tank, and further comprising an oil supplementing mechanism for supplementing oil to the oil-immersed transformer, characterized in that: The oil supplementing mechanism comprises a connector (300) arranged at the end of the oil outlet pipe of the oil pump (200), the inner cavity end of the connector (300) is rotationally connected with an oil injection head (301), the outer arc surface of the oil injection head (301) is threadedly connected with an internally threaded cylinder (302), the outer arc surface of the lower end of the internally threaded cylinder (302) is provided with a plurality of mounting seats (303) uniformly distributed, each of the mounting seats (303) is rotationally connected with a rotating wheel (304), the outer arc surface of the lower end of the rotating wheel (304) is provided with a clamping plate (305), and the outside of the internally threaded cylinder (302) is further provided with a driving assembly for driving the plurality of clamping plates (305) to swing synchronously.

2. The oil-filling structure of the oil-immersed transformer according to claim 1, characterized in that: The driving assembly comprises a sliding cover (400) slidingly connected to the outer arc surface of the internally threaded cylinder (302), the inner arc surface of the sliding cover (400) is provided with a rack plate (401) near each rotating wheel (304), and the outer arc surface of each rotating wheel (304) is provided with an arc-shaped toothed plate (402) in meshing connection with the adjacent rack plate (401) on the same side.

3. The oil-filling structure of the oil-immersed transformer according to claim 2, characterized in that: Further comprising an elastic assembly for providing elastic force for the sliding cover (400), the elastic assembly comprises a fixing ring (500) arranged at the end of the outer arc surface of the internally threaded cylinder (302) away from the sliding cover (400), a spring (501) is arranged between the fixing ring (500) and the sliding cover (400), and the spring (501) is movably sleeved with the outside of the internally threaded cylinder (302).

4. The oil-filling structure of an oil-immersed transformer according to claim 1, characterized in that: The lower end of the oil injection head (301) is in inverted conical shape.

5. The oil-filling structure of an oil-immersed transformer according to claim 1, characterized in that: The lower end of the oil injection head (301) is provided with a rubber pad (600).

6. The oil-filling structure of an oil-immersed transformer according to claim 2, characterized in that: The outer arc surface of the internally threaded cylinder (302) is provided with a plurality of rectangular sliding grooves uniformly distributed, and the sliding cover (400) is provided with a rectangular protrusion in sliding cooperation with each rectangular sliding groove.

7. The oil-filling structure of an oil-immersed transformer according to claim 1, characterized in that: The end of the clamping plate (305) is inclined downward from inside to outside.

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