Low-loss oil-immersed transformer

Abstract

The utility model provides a low-loss oil-immersed transformer, which relates to the technical field of transformers and comprises a support frame, two stabilizing plates mounted above the support frame, a transformer mounted above the stabilizing plates, a sealing cover mounted above the transformer, and a sealing gasket mounted between the transformer and the sealing cover. And a group of threaded rods are arranged above the sealing cover. The supporting frame, the stabilizing plate and the stabilizing frame are arranged to be connected with the external support, the supporting frame, the stabilizing plate and the stabilizing frame are matched to achieve the effects of stabilizing and supporting the installation position of the transformer, the stabilizing frame is of an L-shaped structure, installed on the two sides of the transformer and connected with the external support, and the weight of the transformer can be effectively dispersed; the centers of the support frame and the stabilizing plate are prevented from being stressed and bent.

Description

TECHNICAL FIELD

[0001] The utility model relates to transformer technical field especially relates to a low loss oil immersed transformer. BACKGROUND

[0002] Oil immersed transformer is a structural type of transformer, its coil is soaked in insulating oil, and the insulating oil has the characteristics of high insulation strength, large specific heat and good heat conduction performance, can play the role of good insulation, heat dissipation and arc extinguishing, and there are various types of transformers, including a low loss oil immersed transformer, but the current low loss oil immersed transformer still has the following shortcomings after installation:

[0003] The original transformer is easy to bend and break after long-term use because the supporting device at the lower end is stressed more concentratedly during installation, and the transformer is easy to produce small amplitude vibration during transportation and use, which can cause the bolts of the sealing cover to loosen, and the surface sealing structure of the sealing gasket is simple, thereby causing the oil to seep into the interior of the transformer, and the natural wind and the heat sink are used to dissipate heat from the transformer, resulting in poor heat dissipation effect of the transformer, which still causes the transformer to heat and shorten the service life. SUMMARY

[0004] The utility model discloses a low loss oil immersed transformer, when needing to adjust the transverse position of the transformer, can loosen the positioning bolt on the sliding block, moves the firm board, and after adjusting to the appropriate position, tightens the positioning bolt again, and the bolt mounting hole on the support frame, firm board and firm frame is used to connect with the external support, and the whole device is stably installed, the positioning frame at the bottom of the sealing cover is inserted into the installation slot of the sealing gasket, the sealing gasket is installed in the hidden groove above the transformer, the locking bolt passes through the bolt mounting hole of the corner positioning block of the transformer and is connected with the thread groove of the corner of the sealing cover, realizes the installation position locking of the sealing cover, and tightens the sealing gasket at the same time, and the locking inclined block above the limiting frame is engaged with the locking slot at the bottom of the positioning block under the action of the supporting spring, realizes the locking of the locking bolt, and even in the vibration of the transformer transportation process, can guarantee the firmness of the sealing cover installation.

[0005] The utility model discloses a low loss oil immersed transformer, when needing to adjust the transverse position of the transformer, can loosen the positioning bolt on the sliding block, moves the firm board, and after adjusting to the appropriate position, tightens the positioning bolt again, and the bolt mounting hole on the support frame, firm board and firm frame is used to connect with the external support, and the whole device is stably installed, the positioning frame at the bottom of the sealing cover is inserted into the installation slot of the sealing gasket, the sealing gasket is installed in the hidden groove above the transformer, the locking bolt passes through the bolt mounting hole of the corner positioning block of the transformer and is connected with the thread groove of the corner of the sealing cover, realizes the installation position locking of the sealing cover, and tightens the sealing gasket at the same time, and the locking inclined block above the limiting frame is engaged with the locking slot at the bottom of the positioning block under the action of the supporting spring, realizes the locking of the locking bolt, and even in the vibration of the transformer transportation process, can guarantee the firmness of the sealing cover installation.

[0006] Further, a plurality of transverse sliding grooves are formed in the upper position of the support frame, the sliding grooves are T-shaped structures, the two sides of the stabilizing plate are respectively provided with a sliding block with a positioning bolt, the sliding block is T-shaped structure, the sliding block is installed in the inside of the sliding groove, the sliding block and the inside of the sliding groove correspond, a plurality of bolt mounting holes are formed in the support frame, the stabilizing plate and the stabilizing frame respectively.

[0007] Further, a positioning block is arranged at each corner of the transformer, a bolt mounting hole is formed in the middle position of the positioning block, a threaded groove is formed at each corner of the sealing cover, and the locking bolt is threadedly connected through the bolt mounting hole and the threaded groove.

[0008] Further, four bent necks are arranged at the side positions of the sealing cover, the four bent necks are distributed in a rectangular structure, a plurality of drainage grooves corresponding to the cooling fins of the transformer are formed in the bottom position of the sealing cover, and the bent necks and the drainage grooves are communicated.

[0009] Further, a positioning frame is arranged at the bottom position of the sealing cover, the positioning frame is a back-shaped structure, an installation groove corresponding to the positioning frame is formed in the upper position of the sealing gasket, and the positioning frame extends into the inside of the installation groove.

[0010] Further, a hidden groove corresponding to the sealing gasket is formed in the upper position of the transformer, the hidden groove is a back-shaped structure, the sealing gasket is installed in the inside of the hidden groove, two groups of sealing strips and two groups of oil blocking grooves are arranged on the outer side of the sealing gasket, and the sealing strips and the oil blocking grooves are back-shaped structures respectively.

[0011] Further, a sliding groove is formed in the middle position of the locking bolt, a limiting groove is formed at the two sides of the sliding groove, a limiting frame is arranged between the sliding groove and the limiting groove, and the limiting frame extends to the outside position of the limiting groove.

[0012] Further, a plurality of locking inclined blocks are arranged at the upper position of the limiting frame, the locking inclined blocks are one-way limiting structures, a plurality of locking grooves corresponding to the locking inclined blocks are formed in the bottom position of the positioning block, a supporting spring is arranged at the bottom position of the limiting frame, the locking inclined blocks and the locking grooves are engaged, and a pressing ring is arranged on the outer surface of the locking bolt.

[0013] Further, a plurality of bolt mounting holes are formed in the two sides of the stabilizing frame, and the stabilizing frame is an L-shaped structure.

[0014] The low-loss oil-immersed transformer has the following beneficial effects:

[0015] The support frame, the stable plate and the stable frame are connected with the external support, and the support frame, the stable plate and the stable frame cooperate to realize the effect of stabilizing and supporting the installation position of the transformer, wherein the stable frame is in an L-shaped structure, is installed on both sides of the transformer and is connected with the external support, can effectively disperse the weight of the transformer, and prevents the support frame and the stable plate from being bent by the central stress.

[0016] The heat dissipation fan is installed above the sealing cover through a threaded rod and a nut, air is sucked through an air inlet hole, is transported to the drainage groove position through an air outlet sleeve and a connected drainage pipe, flows in the drainage groove, fully contacts the heat dissipation fins of the transformer, carries away heat, thereby accelerating the heat dissipation efficiency of the heat dissipation fins, effectively reducing the working temperature of the transformer and prolonging the service life of the transformer.

[0017] The transformer and the sealing cover are sealed through a sealing gasket, a sealing strip and an oil blocking groove are arranged on the sealing gasket, and the sealing strip and the oil blocking groove cooperate to enhance the sealing effect and effectively prevent oil from seeping from the inside of the transformer.

[0018] The locking bolt is arranged to realize the effect of locking the transformer and the sealing cover, the locking inclined block above the limiting frame is engaged with the locking groove at the bottom of the positioning block under the action of the supporting spring, the locking bolt is prevented from loosening, even if the transformer vibrates during transportation, the sealing cover can be firmly installed, when the locking bolt needs to be disassembled, the limiting frame is pressed downward, the locking inclined block is disengaged from the locking groove, and the locking bolt can be disassembled by using a wrench. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below.

[0020] The drawings described below only relate to some embodiments of the present application, and are not a limitation on the present application.

[0021] In the drawings:

[0022] Figure 1 A schematic view of the axial side structure of the oil-immersed transformer after assembly is shown;

[0023] Figure 2 A schematic view of the axial side structure of the oil-immersed transformer after assembly is shown; Figure 1 A schematic view of the axial side structure of the oil-immersed transformer after assembly is shown;

[0024] Figure 3 A schematic view of the axial side structure of the oil-immersed transformer after assembly is shown;

[0025] Figure 4 A schematic view of the axial side structure of the oil-immersed transformer after assembly is shown; Figure 3 A schematic view of the axial side structure of the oil-immersed transformer after assembly is shown;

[0026] Figure 5The application shows the axial side structure schematic diagram of the transformer, the sealing cover, the sealing gasket after cutting;

[0027] Figure 6 The application shows the axial side structure schematic diagram of the transformer, the sealing cover, the sealing gasket after cutting; Figure 5 The application shows the axial side structure schematic diagram of the transformer, the sealing cover, the sealing gasket after cutting;

[0028] Figure 7 The application shows the axial side structure schematic diagram of the transformer, the sealing cover, the sealing gasket after cutting;

[0029] Figure 8 The application shows the axial side structure schematic diagram of the transformer, the sealing cover, the sealing gasket after cutting;

[0030] Figure 9 The application shows the axial side structure schematic diagram of the transformer, the sealing cover, the sealing gasket after cutting; Figure 6 The application shows the axial side structure schematic diagram of the transformer, the sealing cover, the sealing gasket after cutting;

[0031] List of reference signs

[0032] 1, support frame;

[0033] 2, stable plate;

[0034] 3, transformer; 301, positioning block;

[0035] 4, sealing cover; 401, bent neck;

[0036] 5, sealing gasket;

[0037] 6, heat dissipation fan;

[0038] 7, locking bolt; 701, limiting frame;

[0039] 8, stable frame. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0041] Embodiment one: please refer to Figures 1 to 9 :

[0042] The utility model provides a kind of low-loss oil-immersed transformer, comprising: support frame 1, two firm boards 2 are installed in the upper position of support frame 1, a transformer 3 is installed in the upper position of firm board 2, transformer 3 is fixed in the upper position of firm board 2 with cooperation fixed bolt, work selects a mature technology in prior art according to needs Low-loss oil-immersed transformer 3, a sealing cover 4 is installed in the upper position of transformer 3, a sealing gasket 5 is installed between transformer 3 and sealing cover 4, a positioning frame is equipped in the bottom position of sealing cover 4, positioning frame is back-shaped structure, a mounting groove corresponding with positioning frame is opened in the upper position of sealing gasket 5, positioning frame extends to the inside of mounting groove, sealing gasket 5 selects a rubber material with long service life in prior art according to needs, positioning frame cooperates with mounting groove to realize the effect that sealing cover 4, sealing gasket 5 are stably spliced, a hidden groove corresponding with sealing gasket 5 is opened in the upper position of transformer 3, hidden groove is back-shaped structure, sealing gasket 5 is installed in the inside of hidden groove, two groups of sealing strips and two groups of oil baffle are equipped on the outside of sealing gasket 5, sealing strip and oil baffle are back-shaped structure respectively, sealing strip and oil baffle mutually cooperate to enhance the sealing effect of sealing gasket 5, effectively avoid the phenomenon that transformer 3 inside seeps oil;

[0043] In the embodiments of the present disclosure, as shown in Figures 1 to 9

[0044] A positioning block 301 is respectively arranged at four corners of transformer 3, a bolt mounting hole is opened in the middle position of positioning block 301, a threaded groove is respectively opened at four corners of sealing cover 4, locking bolt 7 is threadedly connected through bolt mounting hole and threaded groove, therefore, after locking bolt 7 is installed by staff with the help of wrench in prior art, locking bolt 7 realizes the effect that the installation position of sealing cover 4 is locked, in addition, sealing gasket 5 is pressed by sealing cover 4 simultaneously, so that sealing gasket 5 effectively seals between transformer 3 and sealing cover 4;

[0045] In the embodiments of the present disclosure, as shown in Figures 1 to 9

[0046] ​​The upper position of the sealing cover 4 is provided with a set of threaded rods, the outer side position of the threaded rod is provided with a heat dissipation fan 6, the threaded rod cooperates with the nut to realize the stable installation position effect of the heat dissipation fan 6, the side position of the sealing cover 4 is provided with four bent necks 401, the four bent necks 401 are distributed in a rectangular structure, the staff refers to the communication structure of the set of bent necks 401 in the prior art, the staff installs the drainage pipe between the four bent necks 401, the drainage pipe can be communicated between the four bent necks 401, a set of drainage grooves corresponding to the heat dissipation fins of the transformer 3 are arranged at the bottom position of the sealing cover 4, the bent neck 401 and the drainage groove are communicated, when the drainage pipe is installed between the air outlet sleeve of the heat dissipation fan 6 and one of the bent necks 401, the heat dissipation fan 6 effectively delivers air to the position of the drainage groove, then the airflow assists the heat dissipation of the heat dissipation fins of the transformer 3, accelerates the heat dissipation efficiency of the heat dissipation fins of the transformer 3, and effectively prolongs the service life of the transformer 3.

[0047] In the embodiments of the present disclosure, as shown in Figures 1 to 9

[0048] A set of locking bolts 7 are arranged at the corner of the transformer 3 and the sealing cover 4, a set of vertical heat dissipation fins are arranged at the four sides of the transformer 3, a sliding groove is arranged at the middle position of the locking bolt 7, a limiting groove is arranged at the two sides of the sliding groove, a limiting frame 701 is arranged between the sliding groove and the limiting groove, the limiting frame 701 is transversely and circumferentially positioned by the cooperation of the sliding groove and the limiting groove, the limiting frame 701 can be stably moved up and down in the position of the sliding groove and the limiting groove, the limiting frame 701 extends to the outer side position of the limiting groove, so that the staff can effectively push the limiting frame 701 up and down, the staff presses the limiting frame 701 downward to unlock the locking bolt 7, at this time, the staff can use a wrench to effectively remove the locking bolt 7, a set of locking inclined blocks are arranged at the upper position of the limiting frame 701, the locking inclined blocks are one-way limiting structures, a set of locking grooves corresponding to the locking inclined blocks are arranged at the bottom position of the positioning block 301, a supporting spring is arranged at the bottom position of the limiting frame 701, the supporting spring pushes the locking inclined blocks and the locking grooves to engage, a pressing ring is arranged on the outer surface of the locking bolt 7, even if the transformer 3 vibrates during transportation, the limiting frame 701 can effectively prevent the locking bolt 7 from loosening after the locking bolt 7 is installed;

[0049] In the embodiments of the present disclosure, as shown in Figures 1 to 9

[0050] ​​The upper side of the control heat dissipation fan 6 is provided with an air outlet sleeve, one side of the control heat dissipation fan 6 is provided with an air inlet hole, the staff selects a simple fan heat dissipation structure in the prior art according to needs, the two sides of the transformer 3 are respectively provided with one stable frame 8 matched with fixing bolts, a group of transverse sliding grooves are arranged at the upper side of the support frame 1, the sliding grooves are T-shaped structures, the two sides of the stable plate 2 are respectively provided with one sliding block with a positioning bolt, the sliding block is T-shaped, the sliding block is arranged in the sliding groove, and the sliding block and the inside of the sliding groove correspond to each other, so that the sliding groove realizes the effects of circular movement, up-down positioning and transverse movement of the stable plate 2, the support frame 1, the stable plate 2 and the stable frame 8 are respectively provided with a group of bolt mounting holes, and the bolt massage pillow holes are used for mounting fixing bolts, so that the support frame 1, the stable plate 2 and the stable frame 8 are stably mounted on the support in the prior art through the fixing bolts, a group of bolt mounting holes are arranged at the two sides of the stable frame 8, the stable frame 8 is L-shaped, after the other side of the stable frame 8 is mounted on the support in the prior art through the fixing bolts, the stable frame 8 realizes the effect of force dispersion of the mounting position of the transformer 3, and the problems of bending of the support frame 1 and the stable plate 2 at the center position are solved.

[0051] In the embodiment two, on the basis of the embodiment one, referring to Figures 1 to 9 As shown in the figure, the staff selects a temperature sensor in the prior art according to needs, the model of the temperature sensor is selected according to needs, the temperature sensor is mounted on the sealing cover 4 and electrically connected with the heat dissipation fan 6, so that the heat dissipation fan 6 can realize the effect of automatic heat dissipation of the transformer 3.

[0052] Working principle of the embodiment:

[0053] Installation preparation, the T-shaped sliding block at the two sides of the stable plate 2 is matched with the T-shaped sliding groove above the support frame 1, so that the stable plate 2 is circularly positioned and transversely moved, when it is necessary to adjust the transverse position of the transformer 3, the positioning bolt on the sliding block is loosened, the stable plate 2 is moved, the positioning bolt is tightened after the stable plate 2 is adjusted to the appropriate position, the bolt mounting holes on the support frame 1, the stable plate 2 and the stable frame 8 are used for being connected with the external support, and the whole device is stably mounted, wherein the stable frame 8 is L-shaped, is mounted at the two sides of the transformer 3 and is connected with the external support, can effectively disperse the weight of the transformer 3, and prevents the support frame 1 and the stable plate 2 from being bent at the center position;

[0054] The positioning frame at the bottom of the sealing cover 4 is inserted into the mounting groove of the sealing gasket 5, the sealing gasket 5 is mounted in the hidden groove above the transformer 3, the locking bolt 7 is connected with the threaded groove at the corner of the sealing cover 4 through the bolt mounting hole of the positioning block 301 at the corner of the transformer 3, the mounting position of the sealing cover 4 is locked, the sealing gasket 5 is compressed at the same time, the locking inclined block above the limiting frame 701 is engaged with the locking groove at the bottom of the positioning block 301 under the action of the supporting spring, the locking bolt 7 is prevented from loosening, and the firmness of the installation of the sealing cover 4 is ensured even in the vibration during the transportation of the transformer 3;

[0055] The staff determines the installation position of the support frame 1 on the external support according to the layout and requirements of the installation site, installs the support frame 1 on the external support through the bolt mounting holes on the support frame 1, the stable plate 2 and the stable frame 8, and uses the fixing bolts, puts the sliding blocks on both sides of the stable plate 2 into the sliding grooves above the support frame 1, and adjusts the positions, and the positions of the stable plate 2 can be preliminarily fixed by appropriately tightening the positioning bolts on the sliding blocks according to the needs;

[0056] When the transformer is installed, the staff places the transformer 3 above the stable plate 2 by means of the existing carrying machine, and firmly installs the transformer 3 on the stable plate 2 by using the fixing bolts, so that the positions of the four positioning blocks 301 at the corners of the transformer 3 are accurate;

[0057] When the sealing cover 4 is installed, the staff installs the sealing gasket 5 in the hidden groove above the transformer 3, ensures the correct positions of the sealing strip and the oil blocking groove, places the sealing cover 4 above the transformer 3, inserts the positioning frame at the bottom of the sealing cover 4 into the mounting groove of the sealing gasket 5, and aligns the threaded groove at the corner of the sealing cover 4 with the bolt mounting hole on the positioning block 301 of the transformer 3;

[0058] The staff takes a set of locking bolts 7, inserts the locking bolts 7 through the bolt mounting holes of the positioning blocks 301 and screws them into the threaded grooves of the sealing cover 4, and appropriately tightens them by using a wrench, at this time, the position of the limiting frame 701 on the locking bolt 7 is noticed, the locking inclined block is engaged with the locking groove at the bottom of the positioning block 301, the locking bolt 7 is prevented from loosening, and the locking between the transformer 3 and the sealing cover 4 is completed;

[0059] When the cooling fan 6 is installed, the staff installs the cooling fan 6 on the corresponding position above the sealing cover 4 through the threaded rod and the nut, and ensures that the direction of the air inlet hole and the air outlet sleeve of the cooling fan 6 is correct;

[0060] When the drainage pipe is connected, the staff refers to the bend neck 401 communication structure in the existing technology, connects the four bend necks 401 with the drainage pipe, and then connects the air outlet sleeve of the cooling fan 6 with one of the bend necks 401 with the drainage pipe, so as to ensure that the connection is tight and there is no air leakage;

[0061] When the stabilizing frame 8 is reinforced, the workers install the stabilizing frame 8 on the external support through the bolt mounting holes on the two sides of the stabilizing frame 8 by using the fixing bolts, so that the stabilizing frame 8 is in close contact with the transformer 3, and force dispersion of the installation position of the transformer 3 is realized.

[0062] When the transformer 3 is started and maintained, the workers start the transformer 3 according to the prior art, and electrically connect the transformer 3 and the cooling fan 6, and the cooling fan 6 starts to work at the same time, air is introduced into the transformer 3 through the flow guide pipe and the flow guide groove, and the heat dissipation fins of the transformer 3 are cooled.

[0063] During the operation of the transformer 3, it is necessary to regularly check whether the sealing gasket 5 has damage or aging signs, and replace the sealing gasket 5 in time if necessary, and check the fastening of the locking bolt 7 and the operation state of the cooling fan 6, so as to ensure the normal operation of the device.

[0064] If the transformer 3 needs to be overhauled or maintained, the operation of the transformer 3 needs to be stopped first, and then the sealing cover 4 is disassembled according to the following steps: the workers press the limiting frame 701 downward, so that the locking inclined block is separated from the locking groove, the workers loosen and remove the locking bolt 7 by using a wrench, and then the sealing cover 4 is removed, and subsequent overhauling or maintenance work is carried out.

[0065] In this paper, the following points need to be noted:

[0066] 1. The drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure, and other structures can be referred to the general design.

[0067] 2. In the case of no conflict, the embodiments of the present disclosure and the features in the embodiments can be combined to obtain new embodiments.

[0068] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present disclosure, which should be covered in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A low-loss oil-immersed transformer comprising: The utility model provides a kind of transformer (3), the upper position of support frame (1) installs two stable plates (2), the upper position of stable plate (2) installs a transformer (3), it is characterized in that, the upper position of transformer (3) installs a sealing cover (4), a sealing gasket (5) is installed between transformer (3) and sealing cover (4), the upper position of sealing cover (4) is equipped with a group of threaded rods, the outer side position of threaded rod installs a cooling fan (6), a group of locking bolts (7) is installed in the corner of transformer (3) and sealing cover (4), the four sides of transformer (3) are respectively equipped with a group of vertical fins, the upper of control cooling fan (6) is equipped with a air outlet sleeve, control cooling fan (6) one side is opened an air inlet hole, the two sides of transformer (3) are cooperated with fixed bolt and are installed a stable frame (8) respectively.

2. The low-loss oil-immersed transformer according to claim 1, wherein, The upper position of the support frame (1) is provided with a group of transverse sliding grooves, and the two sides of the stable plate (2) are respectively provided with a sliding block with a positioning bolt, the sliding block is installed in the inner part of the sliding groove, and the sliding block and the inner part of the sliding groove correspond to each other, and the support frame (1), the stable plate (2) and the stable frame (8) are respectively provided with a group of bolt mounting holes.

3. The low-loss oil-immersed transformer according to claim 1, wherein, The four corners of the transformer (3) are respectively provided with a positioning block (301), a bolt mounting hole is formed in the middle position of the positioning block (301), a threaded groove is formed in the four corners of the sealing cover (4), and the locking bolt (7) is threadedly connected through the bolt mounting hole and the threaded groove.

4. The low-loss oil-immersed transformer according to claim 1, wherein, The side position of the sealing cover (4) is provided with four bent necks (401), the four bent necks (401) are distributed in a rectangular structure in sequence, a group of drainage grooves corresponding to the fins of the transformer (3) are formed in the bottom position of the sealing cover (4), and the bent neck (401) and the drainage groove are communicated.

5. The low-loss oil-immersed transformer according to claim 1, wherein, The bottom position of the sealing cover (4) is provided with a positioning frame, a mounting groove corresponding to the positioning frame is formed in the upper position of the sealing gasket (5), and the positioning frame extends to the inner part of the mounting groove.

6. The low-loss oil-immersed transformer according to claim 1, wherein, A hidden groove corresponding to the sealing gasket (5) is formed in the upper position of the transformer (3), the hidden groove is in a character-shaped structure, the sealing gasket (5) is installed in the inner part of the hidden groove, and the outer side of the sealing gasket (5) is provided with two groups of sealing strips and two groups of oil blocking grooves.

7. The low-loss oil-immersed transformer according to claim 1, wherein, A sliding groove is formed in the middle position of the locking bolt (7), a limiting groove is formed in the two sides of the sliding groove, a limiting frame (701) is installed between the sliding groove and the limiting groove, and the limiting frame (701) extends to the outer side position of the limiting groove.

8. The low-loss oil-immersed transformer according to claim 7, wherein, The upper position of the limiting frame (701) is provided with a set of locking inclined blocks, the locking inclined blocks are one-way limiting structures, the bottom position of the positioning block (301) is provided with a set of locking grooves corresponding to the locking inclined blocks, the bottom position of the limiting frame (701) is provided with a supporting spring, the locking inclined blocks and the locking grooves are engaged, and the outer surface of the locking bolt (7) is provided with a pressing ring.

9. The low-loss oil-immersed transformer according to claim 1, characterized in that, A set of bolt mounting holes are formed in the two sides of the stabilizing frame (8).

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