Oil-immersed power transformer

Abstract

The utility model discloses an oil-immersed power transformer which comprises a transformer body, the top of the transformer body is connected with a sealing cover, handles are symmetrically installed on the left side and the right side of the top of the sealing cover, and the left side and the right side of the transformer body are arranged outside the left side and the right side of the transformer body. A sealing ring is mounted at the bottom of the sealing cover; the four corners of the bottom of the sealing cover penetrate through bearings to be connected with locking rods, and the bottoms of the locking rods are connected with clamping grooves. A sealing bag is mounted on the inner wall of the periphery of the transformer body; fixing plates are symmetrically arranged on the left side and the right side of the transformer body, and the fixing plates are used for installing and fixing the cooling fins. According to the oil-immersed power transformer, the transformer body and the sealing cover are conveniently and firmly connected through the locking rods and the clamping grooves, the sealing performance between the transformer body and the sealing cover can be enhanced through the sealing ring on the inner side and the sealing air bag on the outer side, and during maintenance and repair, the cooling fins and the transformer body can be detached, so that the cooling fins and the transformer body can be conveniently replaced. And the operation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of power transformers, in particular to an oil-immersed power transformer. Background Art

[0002] Transformer is a kind of static electrical equipment used to transform AC voltage and current and transmit AC power. It realizes power transmission based on the principle of electromagnetic induction. Transformers can be divided into power transformers, test transformers, instrument transformers and special-purpose transformers according to their uses. Among them, power transformers are necessary equipment for power transmission and distribution and power distribution to power users. Oil-immersed transformers are fully oil-filled sealed type. The corrugated oil tank shell adapts to the expansion of oil with its own elasticity. It is a permanently sealed oil tank. Oil-immersed transformers have been widely used in various power distribution equipment.

[0003] In an oil-immersed power transformer disclosed in publication number CN202021543686.6, a cover plate is movably connected to the upper end of the oil-immersed power transformer body, and corresponding through holes are provided on the upper surface edge of the cover plate and the upper surface edge of the oil-immersed power transformer body, and bolts are movably inserted into the through holes, and nuts are threadedly connected to the lower ends of the side surfaces of the bolts, and the first rubber clamping column can seal the nut part, and the second rubber clamping column can seal the bolt part, and at the same time, the nut can squeeze and position the first rubber clamping column and the second rubber clamping column, and can also seal the first sealing tube and the second sealing tube for easy use, and the side of the oil-immersed power transformer body is welded with evenly distributed corrugated sheets, and a splint is movably connected to the corrugated sheet, and two symmetrically arranged extension plates are provided at the lower ends of the side surfaces of the splint, and the width of the inner cavity of the splint is equal to the distance between two adjacent corrugated sheets and the sum of the thicknesses of the two corrugated sheets, and the two adjacent corrugated sheets can be limited and fixed by the splint;

[0004] However, the above scheme still has the following problems when in use: when in use, the transformer body and the cover plate are locked by multiple sets of bolts and sealed by rubber clamps. During assembly, it is cumbersome and time-consuming to screw the bolts one by one and install the rubber clamps, which affects the efficiency of installation. In addition, the transformer is integrally welded with heat dissipation corrugated sheets on the outside. When the transformer fails and needs maintenance, the transformer needs to be removed as a whole for maintenance. The heat dissipation corrugated sheets are not easy to disassemble, which makes the overall weight of the transformer larger and time-consuming and labor-intensive.

[0005] Therefore, we propose an oil-immersed power transformer to solve the above problems. Utility Model Content

[0006] The utility model aims to provide an oil-immersed power transformer to solve the problem that some oil-immersed power transformers currently available on the market, as mentioned in the background technology, are locked between a transformer body and a cover plate by multiple sets of bolts during use and are sealed by rubber clamps. It is cumbersome and time-consuming to screw the bolts one by one and to sleeve the rubber clamps during assembly, thereby affecting the efficiency of installation. In addition, a heat dissipation corrugated sheet is integrally welded on the outside of the transformer. When the transformer fails and needs maintenance, the transformer needs to be removed as a whole for maintenance. The heat dissipation corrugated sheet is not easy to disassemble, thereby making the overall weight of the transformer larger and time-consuming and labor-intensive.

[0007] To achieve the above object, the utility model provides the following technical solution: an oil-immersed power transformer, comprising a transformer body, a cover connected to the top of the transformer body, handles symmetrically installed on the left and right sides of the top of the cover, and heat sinks arranged on the left and right sides of the transformer body;

[0008] It also includes: a sealing ring is installed at the bottom of the cover, and the sealing ring is used to seal the inner side of the connection between the transformer body and the cover;

[0009] The four corners of the bottom of the cover are connected with a locking rod through the bearing, and the bottom of the locking rod is connected to the card slot, and the card slot is correspondingly opened at the four corners of the top of the transformer body;

[0010] A sealing capsule is installed on the inner walls around the transformer body, and the sealing capsule is used to seal the outer side of the connection between the transformer body and the cover;

[0011] The transformer body is symmetrically provided with fixing plates on the left and right sides, and the fixing plates are used to install and fix the heat sink.

[0012] Preferably, a slide rod is symmetrically connected through the front and rear inner walls of the handle, and the slide rod is arranged in an "L"-shaped structure, and a first spring is installed between the slide rod and the handle, so that the first spring is compressed when the slide rod moves.

[0013] Preferably, the bottom of the sliding rod is slidably sleeved on the top of the locking rod, and a protrusion is fixed to the outer side of the top of the locking rod, and the protrusion is connected to the spiral groove, and the spiral groove is opened on the inner wall of the bottom of the sliding rod. At the same time, the locking rod forms a rotating structure through the protrusion and the spiral groove, so that after the sliding rod moves, it will drive the locking rod to rotate through the spiral groove and the protrusion.

[0014] Preferably, the locking rod is configured as a "T"-shaped structure, and the slot entrance docked at the bottom of the locking rod is configured as a rectangular structure, and the interior of the slot is configured as a circular structure, and the transformer body forms a connection structure through the locking rod and the slot, so that the locking rod is parallel to the slot entrance after rotation.

[0015] Preferably, a pull rope is connected to the outer side of the middle part of the locking rod, and a pressure plate is fixed to the bottom of the pull rope, and the pressure plate is connected to the inner cavity, and the inner cavity is symmetrically opened in the inner wall of the cover, so that after the locking rod is rotated, the pressure plate is driven to slide in the inner cavity through the pull rope.

[0016] Preferably, a second spring is installed between the pressure plate and the inner cavity, and the bottom of the pressure plate is in squeezing contact with an air storage bag installed at the bottom of the inner cavity, and the outlet of the air storage bag is connected to the sealing bag, and the sealing bag is arranged as an annular rectangular structure, so that after the second spring pushes the pressure plate to squeeze the air storage bag, the gas in the air storage bag is transported to the sealing bag.

[0017] Preferably, a knob is installed in the middle of the bottom surface of the transformer body, and the top of the knob is connected to the vertical rods on both sides through a sprocket mechanism, and the vertical rods are symmetrically connected to the left and right inner walls of the transformer body through bearings, and the outer side of the vertical rods are symmetrically connected to two groups of screws through bevel gear connectors, the screw bearings are connected to the side walls of the transformer body, and a fixing plate is threadedly connected to the screw, and the fixing plate is arranged in an "L" shape, so that when the knob is rotated, the vertical rod is driven to rotate, and the vertical rod drives the screw to rotate, thereby driving the fixing plate to disassemble and assemble the heat sink.

[0018] Compared with the prior art, the utility model oil-immersed power transformer has the following beneficial effects: when in use, the transformer body and the cover are conveniently and firmly connected through the locking rod and the card slot, and the inner sealing ring and the outer sealing airbag can enhance the sealing performance between the transformer body and the cover, improve the safety of use, and when performing maintenance and repair, the heat sink and the transformer body can be separated to reduce the weight and facilitate operation. The specific contents are as follows:

[0019] 1. After the sliding rod is pushed upward, the first spring is compressed, and after the sliding rod moves, the spiral groove and the protrusion drive the locking rod to rotate. After the locking rod rotates, the bottom will rotate to a state parallel to the entrance of the card slot, and then the cover is closed and connected with the transformer body, and the sealing ring seals the connection. The locking rod is inserted into the inside of the card slot, the sliding rod is loosened, and the spiral groove and the protrusion drive the locking rod to rotate. The bottom of the locking rod rotates to a state perpendicular to the entrance of the card slot, so that the transformer body and the cover are conveniently and stably installed and fixed, and when the locking rod rotates, the pressure plate is pulled by the pull rope, thereby compressing the second spring. When the locking rod rotates, the pull rope is relaxed, and the second spring drives the pressure plate, and the pressure plate compresses the air storage bag. The air storage bag transports gas to the sealing bag, and the sealing bag performs secondary sealing between the transformer body and the cover to improve the sealing performance;

[0020] 2. After turning the knob, the sprocket mechanism will be raised to drive the vertical rod to rotate synchronously. After the vertical rod rotates, the bevel gear connector will be raised to drive the fixed plate to move, and then separate from the edge of the heat sink. Then the heat sink can be disassembled, which is convenient for later maintenance of the transformer body to reduce the overall weight and facilitate operation. After repair, the heat sink can be installed on the transformer body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the overall front section structure of the utility model;

[0023] Figure 3 For this utility model Figure 2 The enlarged structural diagram at A in the middle;

[0024] Figure 4 For this utility model Figure 2 The enlarged structural diagram at B in the middle;

[0025] Figure 5 It is a schematic diagram of a partial side section structure of the connection between the handle, the slide bar and the locking bar of the utility model;

[0026] Figure 6 It is a schematic diagram of the bottom view of the sealing cover of the utility model.

[0027] In the figure: 1. transformer body; 2. cover; 3. handle; 4. slide bar; 5. first spring; 6. locking rod; 7. bump; 8. spiral groove; 9. slot; 10. pull rope; 11. pressure plate; 12. inner cavity; 13. second spring; 14. air storage bag; 15. sealing bag; 16. sealing ring; 17. knob; 18. vertical rod; 19. screw; 20. fixing plate; 21. heat sink. 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] See also Figure 1-Figure 6 The utility model provides a technical solution: an oil-immersed power transformer, comprising a transformer body 1, a cover 2 is connected to the top of the transformer body 1, and handles 3 are symmetrically installed on the left and right sides of the top of the cover 2, and heat sinks 21 are outside the left and right sides of the transformer body 1, such as Figure 1-Figure 2 As shown, when in use, a matching cover 2 is connected to the top of the transformer body 1, and a handle 3 is provided on the cover 2 for easy movement of the transformer, and heat sinks 21 are provided on both sides of the transformer body 1 for easy cooling of the device;

[0030] The four corners of the bottom of the cover 2 are connected with a locking rod 6 through the bearing, and the bottom of the locking rod 6 is connected to the card slot 9, and the card slot 9 is correspondingly opened at the four corners of the top of the transformer body 1. The sliding rod 4 is symmetrically connected to the front and rear inner walls of the handle 3, and the sliding rod 4 is set to an "L"-shaped structure, and a first spring 5 is installed between the sliding rod 4 and the handle 3. The bottom of the sliding rod 4 is slidably sleeved on the top of the locking rod 6, and a protrusion 7 is fixed on the outer side of the top of the locking rod 6, and the protrusion 7 is connected to the spiral groove 8, and the spiral groove 8 is opened on the inner wall of the bottom of the sliding rod 4. At the same time, the locking rod 6 forms a rotating structure through the protrusion 7 and the spiral groove 8. The locking rod 6 is set to a "T"-shaped structure, and the entrance of the card slot 9 docked at the bottom of the locking rod 6 is set to a rectangular structure, and the inside of the card slot 9 is set to a circular structure, and the transformer body 1 forms a connection structure through the locking rod 6 and the card slot 9, such as Figure 1-Figure 3 and Figure 5-Figure 6 As shown, when fixing the transformer body 1 and the cover 2, hold the handle 3 and push the slide bar 4 on the inner wall of the handle 3 upward. After the slide bar 4 moves upward, it will compress the first spring 5, and after the slide bar 4 moves, it will drive the locking rod 6 to rotate through the spiral groove 8 and the protrusion 7. After the locking rod 6 rotates, the bottom will rotate to a state parallel to the entrance of the card slot 9, and then the cover 2 and the transformer body 1 are closed and connected, and the locking rod 6 will be plugged into the card slot 9, and then the slide bar 4 is released, the first spring 5 will drive the slide bar 4 to move down and reset, and the spiral groove 8 and the protrusion 7 will drive the locking rod 6 to rotate, so that the bottom of the locking rod 6 is in a vertical state with the entrance of the card slot 9, and then the transformer body 1 and the cover 2 are firmly connected and fixed;

[0031] A sealing ring 16 is installed at the bottom of the cover 2, and the sealing ring 16 is used to seal the inner side of the connection between the transformer body 1 and the cover 2. A sealing capsule 15 is installed on the inner wall around the transformer body 1, and the sealing capsule 15 is used to seal the outer side of the connection between the transformer body 1 and the cover 2. A pull rope 10 is connected to the outer side of the middle part of the locking rod 6, and a pressure plate 11 is fixed to the bottom of the pull rope 10, and the pressure plate 11 is connected to the inner cavity 12, and the inner cavity 12 is symmetrically opened in the inner wall of the cover 2. A second spring 13 is installed between the pressure plate 11 and the inner cavity 12, and the bottom of the pressure plate 11 is in compression contact with the air storage bag 14 installed at the bottom of the inner cavity 12, and the outlet of the air storage bag 14 is connected to the sealing bag 15, and the sealing bag 15 is set as a ring-shaped rectangular structure, such as Figure 2-Figure 3 and Figure 6As shown, when the locking rod 6 rotates, the pull rope 10 is pulled, and the pull rope 10 drives the pressure plate 11 to move upward in the inner cavity 12, thereby compressing the second spring 13. When the locking rod 6 rotates and resets, the pull rope 10 is relaxed, and the second spring 13 drives the pressure plate 11 to squeeze the air storage bag 14, and the air storage bag 14 will transport the internal gas to the sealing bag 15. After the sealing bag 15 expands, it will perform a secondary sealing process between the transformer body 1 and the cover 2, thereby enhancing the sealing performance of the connection;

[0032] The transformer body 1 is symmetrically provided with fixing plates 20 on the left and right sides, and the fixing plates 20 are used to install and fix the heat sink 21. A knob 17 is installed in the middle of the bottom surface of the transformer body 1, and the top of the knob 17 is connected to the vertical rods 18 on both sides through a sprocket mechanism, and the vertical rods 18 are symmetrically connected to the inner walls of the left and right sides of the transformer body 1 through bearings, and the outer sides of the vertical rods 18 are symmetrically connected to two groups of screws 19 through bevel gear connectors, the screws 19 are connected to the side walls of the transformer body 1 through bearings, and the fixing plates 20 are threadedly connected to the screws 19, and the fixing plates 20 are set to an "L"-shaped structure, such as Figure 1-Figure 2 and Figure 4 As shown, when the transformer has a problem and needs to be repaired, the heat sink 21 can be separated from the transformer body 1 to reduce the mass, thereby facilitating the movement and operation of the transformer body 1, and the knob 17 at the bottom of the transformer body 1 is turned. After the knob 17 is turned, the vertical rods 18 on both sides are driven to rotate through the sprocket mechanism. After the vertical rods 18 are rotated, the screw 19 is driven to rotate through the bevel gear connector. After the screw 19 is rotated, the fixing plate 20 is driven to move horizontally, thereby separating from the edge of the heat sink 21, and then the heat sink 21 can be removed. During the later assembly, the knob 17 is turned in the opposite direction so that the fixing plate 20 and the edge of the heat sink 21 are pressed and fixed.

[0033] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0034] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An oil-immersed power transformer, comprising a transformer body (1), wherein a cover (2) is connected to the top of the transformer body (1), and handles (3) are symmetrically mounted on the left and right sides of the top of the cover (2), and heat sinks (21) are arranged on the left and right sides of the transformer body (1); Features: Also includes: A sealing ring (16) is installed at the bottom of the cover (2), and the sealing ring (16) is used to seal the inner side of the connection between the transformer body (1) and the cover (2); The four corners of the bottom of the cover (2) are connected to a locking rod (6) penetrating the bearing, and the bottom of the locking rod (6) is connected to a clamping groove (9), and the clamping groove (9) is correspondingly provided at the four corners of the top of the transformer body (1); Sealing capsules (15) are installed on the inner walls around the transformer body (1), and the sealing capsules (15) are used to seal the outer side of the connection between the transformer body (1) and the cover (2); The transformer body (1) is symmetrically provided with fixing plates (20) on the left and right sides, and the fixing plates (20) are used to install and fix the heat sink (21).

2. An oil-immersed power transformer according to claim 1, characterized in that: A sliding rod (4) is symmetrically connected and penetrates the front and rear inner walls of the handle (3), and the sliding rod (4) is arranged in an "L"-shaped structure, and a first spring (5) is installed between the sliding rod (4) and the handle (3).

3. An oil-immersed power transformer according to claim 2, characterized in that: The bottom of the slide rod (4) is slidably sleeved on the top of the locking rod (6), and a protrusion (7) is fixed to the outer side of the top of the locking rod (6), and the protrusion (7) is connected to the spiral groove (8), and the spiral groove (8) is opened on the inner wall of the bottom of the slide rod (4), and the locking rod (6) forms a rotating structure through the protrusion (7) and the spiral groove (8).

4. The oil-immersed power transformer according to claim 1, characterized in that: The locking rod (6) is configured as a "T"-shaped structure, and the entrance of the card slot (9) connected to the bottom of the locking rod (6) is configured as a rectangular structure, and the interior of the card slot (9) is configured as a circular structure, and the transformer body (1) forms a connection structure through the locking rod (6) and the card slot (9).

5. The oil-immersed power transformer according to claim 1, characterized in that: A drawstring (10) is connected to the outer side of the middle of the locking rod (6), a pressure plate (11) is fixed to the bottom of the drawstring (10), the pressure plate (11) is connected to the inner cavity (12), and the inner cavity (12) is symmetrically opened in the inner wall of the cover (2).

6. The oil-immersed power transformer according to claim 5, characterized in that: A second spring (13) is installed between the pressure plate (11) and the inner cavity (12), and the bottom of the pressure plate (11) is in compression contact with an air storage bag (14) installed at the bottom of the inner cavity (12), and the outlet of the air storage bag (14) is connected to the sealing bag (15), and the sealing bag (15) is configured as an annular rectangular structure.

7. The oil-immersed power transformer according to claim 1, characterized in that: A knob (17) is installed in the middle of the bottom surface of the transformer body (1), and the top of the knob (17) is connected to the vertical rods (18) on both sides through a sprocket mechanism, and the vertical rods (18) are symmetrically connected to the inner walls of the left and right sides of the transformer body (1) through bearings, and the outer sides of the vertical rods (18) are symmetrically connected to two groups of screw rods (19) through bevel gear connectors, the screw rods (19) are bearing-connected to the side walls of the transformer body (1), and the screw rods (19) are threadedly connected to a fixing plate (20), and the fixing plate (20) is arranged in an "L"-shaped structure.

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