Overall vacuum oil injection device for transformer

Abstract

The invention discloses an integral vacuum oiling device for a transformer, and relates to the technical field of oiling. The transformer integral vacuum oiling device comprises a transformer body, the side face of the bottom of the transformer body is connected with an oil pipe, the end, away from the transformer body, of the oil pipe is connected with a ball valve through a flange, the ball valve is composed of a valve body and a valve element, and an oil storage barrel is arranged at the top end of the transformer body; an expansion assembly is assembled in the valve body and comprises a first gasket and a second gasket. According to the overall vacuum oil injection device for the transformer, a hinge block, a first spring, an L-shaped supporting rod, a first gasket, a second gasket, a fixing block, an expansion bag, a trigger bag and a rectangular groove are matched, the hinge block can extrude the trigger bag through rotation of a valve element, so that the expansion bag expands, a gap can be filled with the expansion bag, and the interior of a ball valve is sealed.

Description

Technical Field

[0001] This invention relates to the field of oil injection, specifically to a transformer overall vacuum oil injection device. Background Technology

[0002] Large oil-immersed power transformers need to be filled with transformer oil before factory testing and after on-site installation. Air must not be mixed into the transformer during the oil filling process, otherwise it will affect the breakdown strength of the transformer oil and the partial discharge level of the transformer. The higher the voltage level, the stricter the requirements for the quality of oil filling.

[0003] Existing transformer vacuum oil filling devices have poor sealing and external contamination prevention performance during use, making it easy for external dust, water, or air to enter the oil filling system, thus failing to maintain the cleanliness of the oil filling process and leading to a decrease in productivity. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a transformer integral vacuum oil injection device, solving the problems mentioned in the background section. To achieve the above objectives, this invention is implemented through the following technical solution: A transformer integral vacuum oil injection device includes a transformer body. An oil pipe is connected to the bottom side of the transformer body. A ball valve is connected to the end of the oil pipe furthest from the transformer body via a flange. The ball valve consists of a valve body and a valve core. An oil storage tank is located at the top of the transformer body. An expansion assembly is assembled inside the valve body. The expansion assembly includes a first washer and a second washer, both of which are fixedly connected inside the valve body. An L-shaped support rod is fixedly connected to the top of the valve body. A fixing block is fixedly connected to the end of the L-shaped support rod furthest from the valve body. An expansion bladder is installed on the outside of the fixing block. A trigger bladder is fixedly connected to the back of the fixing block. The trigger bladder and the expansion bladder are in communication. A rectangular groove is formed inside the valve core. A hinge block is hinged to the outside of the valve core. A spring is elastically connected between the rectangular groove and the hinge block. A one-way valve is fixedly connected inside the fixing block.

[0005] Preferably, the trigger bladder is located on the motion trajectory of the hinge block.

[0006] Preferably, the expansion bladder is located between the first washer and the second washer, and both are made of rubber.

[0007] Preferably, the fixed block is internally equipped with a flow-limiting component.

[0008] Preferably, the flow limiting component includes a flow limiting tube, and the flow limiting tube has five sets of flow limiting channels inside. A flow limiting net is installed at the inlet of each of the five sets of flow limiting channels. A sliding rod is slidably connected through the inside of each flow limiting channel. There are two sets of sliding rods. A stop post is fixedly connected to the side of each of the two sets of sliding rods near the one-way valve. A through rod is inserted through the inside of each of the two sets of stop posts. A spring is elastically connected between each of the two sets of through rods and the inside of the flow limiting channel.

[0009] Preferably, the middle flow-limiting channel is vertical, and the other four flow-limiting channels are spirally interwoven.

[0010] Preferably, the valve body is internally equipped with a compression assembly.

[0011] Preferably, the extrusion assembly includes a sliding track and an annular extrusion plate. Four sets of sliding tracks are provided, each fixedly connected to the inner perimeter of the valve body. The annular extrusion plate is slidably connected to the surfaces of the four sets of sliding tracks. The inner side of the annular extrusion plate is fixedly connected to two sliding rods via two fixed rods. Eight sets of grooves are provided inside the annular extrusion plate. T-shaped rods are slidably connected inside each of the eight sets of grooves. Springs are elastically connected between each of the eight sets of T-shaped rods and the eight sets of grooves. A rubber reduction wheel is rolledly connected to the end of each of the eight sets of T-shaped rods away from the springs.

[0012] Preferably, each pair of the eight sets of rubber reduction wheels is respectively fitted with four sets of sliding tracks.

[0013] This invention provides a transformer integral vacuum oil injection device. It has the following beneficial effects: (1) The overall vacuum oil injection device of the transformer, together with the hinge block, spring one, L-shaped support rod, washer one, washer two, fixing block, expansion bladder, trigger bladder and rectangular groove, the hinge block can squeeze the trigger bladder by rotating the valve core, thereby causing the expansion bladder to expand, and then the expansion bladder can fill the gap, so that the ball valve is sealed inside.

[0014] (2) The overall vacuum oil injection device of the transformer, together with the current limiting channel, sliding rod, blocking column, spring 2, current limiting net, one-way valve, current limiting pipe and through rod, can make the sliding rod move by the movement of the hinge block, thereby blocking the one-way valve, while the current limiting channel can slow down the oil injection speed.

[0015] (3) The overall vacuum oil injection device of the transformer, together with the sliding track, the annular extrusion plate, the fixed rod, the spring three, the T-shaped rod and the rubber reduction wheel, moves on the sliding track through the rubber reduction wheel, thereby driving the annular extrusion plate to extrude the gasket two, thereby enhancing the sealing performance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic cross-sectional view of the ball valve of the present invention; Figure 3 This is a schematic diagram of the valve core structure of the present invention; Figure 4 This is a schematic diagram of the expansion component structure of the present invention; Figure 5 This is a schematic diagram of the trigger capsule structure of the present invention; Figure 6 This is a schematic diagram of the current limiting component structure of the present invention; Figure 7 This is a schematic cross-sectional view of the flow-limiting tube of the present invention; Figure 8 This is a partial structural diagram of the current limiting component of the present invention; Figure 9 For the present invention Figure 8 Enlarged structural diagram at point B; Figure 10 This is a schematic diagram of the extrusion assembly structure of the present invention; Figure 11 This is a partial structural diagram of the extrusion assembly of the present invention; Figure 12 For the present invention Figure 11 A magnified structural diagram of point A in the middle.

[0017] In the diagram: 1. Transformer body; 2. Oil pipe; 3. Oil storage tank; 4. Ball valve; 5. Expansion assembly; 6. Current limiting assembly; 7. Extrusion assembly; 9. Valve body; 10. Valve core; 501. Hinge block; 502. Spring 1; 503. L-shaped support rod; 504. Washer 1; 505. Washer 2; 506. Fixing block; 507. Expansion bladder; 508. Trigger bladder; 509. Rectangular groove; 601. Current limiting channel; 602. Sliding rod; 603. Support column; 604. Spring 2; 605. Current limiting net; 606. One-way valve; 607. Current limiting tube; 608. Through rod; 701. Sliding track; 702. Annular extrusion plate; 703. Fixing rod; 704. Spring 3; 705. T-shaped rod; 706. Rubber reduction wheel. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Example

[0019] Please see Figures 1-9One embodiment of the present invention is: a transformer overall vacuum oil injection device, including a transformer body 1, an oil pipe 2 connected to the bottom side of the transformer body 1, the oil pipe 2 being used to transport oil that needs to enter the transformer body 1, a ball valve 4 connected to the end of the oil pipe 2 away from the transformer body 1 via a flange, the ball valve 4 being composed of a valve body 9 and a valve core 10, the ball valve 4 being composed of a valve body 9 and a valve core 10, thus the opening and closing of the ball valve 4 can be controlled by rotating the ball core, an oil storage tank 3 being provided at the top of the transformer body 1, the oil storage tank 3 being used to store the oil for overall vacuum oil injection of the transformer, an expansion component 5 being assembled inside the valve body 9, the expansion component 5 including a first washer 504 and a second washer 505, both of which are fixedly connected to the valve body. Inside valve body 9, gasket 1 504 and gasket 2 505 are of the same size and are positioned one in front of and one behind expansion bladder 507, respectively. An L-shaped support rod 503 is fixedly connected to the top of valve body 9. A fixing block 506 is fixedly connected to the end of the L-shaped support rod 503 away from valve body 9. Expansion bladder 507 is installed on the outside of fixing block 506. The function of the L-shaped support rod 503 is to support fixing block 506 inside valve body 9. Expansion bladder 507 expands or remains unexpanded depending on the state of trigger bladder 508. Trigger bladder 508 is fixedly connected to the back of fixing block 506, and trigger bladder 508 and expansion bladder 507 are interconnected. A handle is provided at the top of valve core 10; rotating the handle controls valve core 10. The valve core 10 controls the opening and closing of the entire ball valve 4. A rectangular groove 509 is provided inside the valve core 10 to facilitate the movement of the hinge block 501. The hinge block 501 is hinged to the outside of the valve core 10. A spring 502 elastically connects the rectangular groove 509 and the hinge block 501. Initially, the hinge block 501 slides on the inner wall of the valve body 9. After rotating a certain angle, it can pop out under the action of the spring 502. Initially, the spring 502 is compressed. When the valve core 10 is rotated to a certain angle, the spring 502, under its own elasticity, causes the hinge block 501 to pop out. A one-way valve 606 is fixedly connected inside the fixed block 506. The trigger bladder 508 is located at the hinge. On the movement trajectory of block 501, expansion bladder 507 is located between washer 1 504 and washer 2 505. Therefore, when expansion bladder 507 expands, it can compress washer 1 504 and washer 2 505 on both sides. Both are made of rubber, thus improving service life. The fixed block 506 is internally equipped with a flow-limiting component 6, which includes a flow-limiting tube 607. The function of the flow-limiting tube 607 is to allow oil to flow in slowly rather than rapidly. Five sets of flow-limiting channels 601 are provided inside the flow-limiting tube 607. The inlet size of the five sets of flow-limiting channels 601 is the same, and a flow-limiting mesh 605 is installed at the inlet of each of the five sets of flow-limiting channels 601.The five sets of flow-limiting meshes 605 have wires arranged in a cross shape and are made of steel wire. Sliding rods 602 are slidably connected to the inside of the flow-limiting channel 601. When the two sets of sliding rods 602 slide, they can drive the two sets of abutment posts 603 to slide synchronously. There are two sets of sliding rods 602. Abutment posts 603 are fixedly connected to the side of each set of sliding rods 602 near the one-way valve 606. The two sets of abutment posts 603 act on both sides of the one-way valve 606. A through rod 608 passes through the inside of each set of abutment posts 603. A second spring 604 is elastically connected between the two sets of through rods 608 and the inside of the flow-limiting channel 601. When the two sets of sliding rods 602 slide, the second spring 604 can be compressed. The middle flow-limiting channel 601 is vertical, while the other four flow-limiting channels 601 are spirally interwoven. This spiral interwoven flow-limiting channel 601 slows down the oil injection flow rate.

[0020] Working principle: The device is moved to the required position and oil is introduced into the transformer body 1 through the cooperation of flange and oil pipe 2. When the oil injection into the transformer body 1 is completed, the handle on the valve core 10 can be rotated, which in turn drives the valve core 10 to rotate. When the valve core 10 rotates to a certain angle, the spring 502, which is compressed by the valve body 9, is converted to an uncompressed state due to the action of the rectangular groove 509. The spring 502 can pop out under its own rebound force. At the same time, since the hinge block 501 and the spring 502 are fixed, the spring 502 can drive the hinge block 501 to pop out synchronously. When the hinge block 501 pops out under the action of the spring 502, the movement trajectory of the hinge block 501 can squeeze the trigger bladder 508. When the trigger bladder 508 is squeezed by the movement trajectory of the hinge block 501, the trigger bladder 508 can act on the expansion bladder 507, causing it to expand. Under the action of trigger bladder 508, bladder 507 expands between gasket 504 and gasket 505 inside ball valve 4. When bladder 507 expands between gasket 504 and gasket 505, it fills the gap between them, creating a seal and thus sealing the inside of valve body 9, improving the overall sealing performance. The advantage of the sealing is that it prevents harmful gases and other impurities in the air from entering the transformer body 1 through the ball valve 4 and oil pipe 2 and affecting the oil injection. At the same time, when the hinge block 501 pops out, it can also squeeze the two sets of sliding rods 602. The sliding of the two sets of sliding rods 602 drives the two sets of abutment columns 603 to move, which can squeeze the one-way valve 606. Meanwhile, the current limiting channel 601 and the current limiting net 605 can slow down the oil injection speed during the oil injection process and prevent the oil injection speed from being too fast. Example

[0021] Please see Figures 1-12Based on the above embodiments, in another embodiment of the present invention, a compression assembly 7 is assembled inside the valve body 9. The compression assembly 7 includes a sliding track 701 and an annular compression plate 702. Four sets of sliding tracks 701 are provided, allowing the annular compression plate 702 to move along the direction of the sliding tracks 701. The four sets of sliding tracks 701 are respectively fixedly connected to the inner periphery of the valve body 9. The annular compression plate 702 is slidably connected to the surface of the four sets of sliding tracks 701. The inner side of the annular compression plate 702 is fixedly connected to two sliding rods 602 via two fixing rods 703. The size of the annular compression plate 702 is adapted to the size of the second gasket 505, thereby compressing the second gasket 505 to enhance the overall sealing performance. The extrusion plate 702 has eight sets of grooves 707 inside. Each of the eight sets of grooves 707 is slidably connected to a T-shaped rod 705. When the eight sets of T-shaped rods 705 are extruded, the spring 3 704 is elastically compressed. When the extrusion force on the eight sets of T-shaped rods 705 disappears, the eight sets of T-shaped rods 705 automatically return to their original position under the action of the spring 3 704's own rebound force. Each of the eight sets of T-shaped rods 705 and the eight sets of grooves 707 is elastically connected to a spring 3 704. The end of each of the eight sets of T-shaped rods 705 away from the spring 3 704 is slidably connected to a rubber reduction wheel 706. The function of the eight sets of rubber reduction wheels 706 is to enhance the friction when the annular extrusion plate 702 slides. Each pair of the eight sets of rubber reduction wheels 706 is respectively in contact with four sets of sliding tracks 701.

[0022] Working principle: When the hinge block 501 pops out under the action of spring 502, it can squeeze the two sets of sliding rods 602 and simultaneously fix the two sets of fixed rods 703, which are fixed to the inner side of the annular compression plate 702, and the two sets of sliding rods 602. Therefore, when the two sets of sliding rods 602 are squeezed, the movement of the two sets of sliding rods 602 can also drive the movement of the two sets of fixed rods 703. When the two sets of fixed rods 703 move, they can drive the annular compression plate 702 to move synchronously. When the annular compression plate 702 moves, it can move back and forth on the four sets of sliding rails 701. When the annular compression plate 702 moves back and forth on the four sets of sliding rails 701, it can also cause the eight sets of rubber reduction wheels 706 to move on the sliding rails 701, thereby increasing the friction. When the annular compression plate 702 moves, it can squeeze the second washer 505, thereby enhancing the overall sealing of the device.

[0023] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A transformer integral vacuum oil injection device, comprising a transformer body, an oil pipe connected to the bottom side of the transformer body, a ball valve connected to the end of the oil pipe away from the transformer body via a flange, the ball valve being composed of a valve body and a valve core, an oil storage tank being provided at the top of the transformer body, and an expansion component being assembled inside the valve body. Its features are: The expansion assembly includes washer one and washer two, both of which are fixedly connected inside the valve body. An L-shaped support rod is fixedly connected to the top of the valve body. A fixing block is fixedly connected to the end of the L-shaped support rod away from the valve body. An expansion bladder is installed on the outside of the fixing block. A trigger bladder is fixedly connected to the back of the fixing block. The trigger bladder and the expansion bladder are in communication with each other. A rectangular groove is opened inside the valve core. A hinge block is hinged to the outside of the valve core. A spring one is elastically connected between the rectangular groove and the hinge block. A one-way valve is fixedly connected inside the fixing block. The fixed block is internally equipped with a flow-limiting component; The flow limiting component includes a flow limiting tube, and five sets of flow limiting channels are provided inside the flow limiting tube. A flow limiting net is installed at the inlet of each of the five sets of flow limiting channels. A sliding rod is slidably connected through the inside of each flow limiting channel. Two sets of sliding rods are provided. A stop post is fixedly connected to the side of each set of sliding rods near the one-way valve. A through rod is passed through the inside of each set of stop posts. A spring is elastically connected between each set of through rods and the inside of the flow limiting channel. The flow-limiting channel in the middle is vertical, while the other four flow-limiting channels are spirally interwoven. The valve body is internally equipped with a compression assembly; The extrusion assembly includes a sliding track and an annular extrusion plate. There are four sets of sliding tracks, which are fixedly connected to the inside of the valve body. The annular extrusion plate is slidably connected to the surface of the four sets of sliding tracks. The inner side of the annular extrusion plate is fixedly connected to two sliding rods via two fixed rods. There are eight sets of grooves inside the annular extrusion plate. T-shaped rods are slidably connected inside each of the eight sets of grooves. Springs are elastically connected between each of the eight sets of T-shaped rods and the eight sets of grooves. Rubber reduction wheels are rolledly connected to the ends of the eight sets of T-shaped rods away from the springs. Two sets of the eight sets of rubber reduction wheels are respectively fitted with four sets of the sliding tracks; The trigger capsule is located on the movement trajectory of the hinge block; The expansion bladder is located between the first washer and the second washer, and both are made of rubber.

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