A three-phase wire frame structure for internal coils of a transformer

Abstract

The present invention provides a three-phase coil frame structure for an internal coil of a transformer, belonging to the technical field of internal coil components of transformers, comprising a coil frame arranged in an inner cavity of the transformer, wherein coil clamping columns are evenly arranged on the coil frame, a closed end cap is arranged on the top of the coil clamping column, and the closed end cap is fixedly mounted on the bottom of the top frame, and the inner cavity of the hidden slot group is embedded with square clamping blocks and arc-shaped clamping blocks in sequence and longitudinally staggered, and three downhill extrusion seats or uphill extrusion seats are selected to be moved according to the specifications of the three-phase coil winding iron core. When installing the coil frame, the coil frame is moved toward the inside of the transformer, and after the reverse arc plates on both sides of the ohm-type elastic pre-connector seat slide into the interior of the pre-connector seat, the reverse arc plates on both sides of the ohm-type elastic pre-connector seat are clamped by a sliding limit clamping assembly, and the stability of the subsequent installation of the coil frame in the transformer is guaranteed by pre-installing the coil frame, thereby bringing convenience to the installation process of relevant personnel.

Description

Technical Field

[0001] The invention relates to the technical field of transformer internal coil components, in particular to a three-phase bobbin structure of a transformer internal coil. Background Art

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. Its main components are primary coil, secondary coil and iron core. Its main functions include: voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization, etc.

[0003] The transformer needs a coil inside to operate, and the coil is usually divided into two types: layer type and pancake type. The turns of the coil are arranged in layers along the axial direction and wound continuously. Each phase of the three-winding transformer has three windings. When one winding is connected to the AC power supply, the other two windings will induce different potentials. This transformer is used for loads that require two different voltage levels. Power plants and substations usually have three different levels of voltage, so three-winding transformers are widely used in power systems;

[0004] The neutral point winding in the three-winding transformer can adjust the voltage level so that the output voltage meets the actual needs. In addition, the three-winding transformer can also adjust the voltage on the high-voltage side and the low-voltage side separately, thereby eliminating the voltage imbalance of the line. The three-winding transformer can also be used for impedance matching in the power system. When the impedance of the normally operating transformer winding in the system cannot meet the system requirements, the neutral point winding can be added for matching, reducing the power load and improving the system performance.

[0005] Due to the important role of the three-phase coil, the installation process of the coil is also one of the important steps relative to the transformer.

[0006] Related art 1 (publication number: CN1074850C) discloses a transformer and a coil frame, and the disclosed technical solution is: a coil frame, which has a pair of core winding parts and a pair of coupling parts coupled with the core winding parts, so that a predetermined space is left between the core winding parts, and the coil frame is formed on its overall outer layer and has slots; a coil, which is formed by winding a certain number of turns of a wire in the slot of the coil frame; and a pair of wound cores, both of which are formed by winding a certain number of turns of electromagnetic steel sheets in the core winding part of the coil frame; wherein the outer surface of each opposite side of the slot in the core winding part is curved, so that a precise cross-sectional shape can be obtained;

[0007] Related technology 2 (publication number: CN101964252B) discloses a transformer coil phase assembly rack, and the disclosed technical solution is: the transformer coil phase assembly rack is derived from a single platform into three single platforms through a simple transformation. Although it is a simple derivation, it has achieved unexpected technical effects and saved the time of repeatedly transporting parts. At the same time, the assembly workers do not need to move the assembly rack during the assembly of the coil, that is, they do not need to change the workstation, which greatly improves the work efficiency. At the same time, the workers do not need to climb up and down frequently, which improves the safety of the workers during operation. On the other hand, without frequent changes of workstations, the assembly accuracy can be well guaranteed and the assembly quality can be improved;

[0008] Related technology 3 (publication number: CN218730339U) discloses a transformer coil support frame, and the disclosed technical solution is: the two sliding plates can be brought closer to each other by a driving member, thereby driving the moving plate at the top of the two rotating plates to gradually move upward, which can drive the transformer coil body placed on the top of the moving plate to move upward, adjust the height to facilitate the connection between the internal electrical components of the transformer and the transformer coil body, and at the same time, the fixing assembly is used to facilitate the installation and removal of the transformer coil body, avoiding the trouble of fixing with multiple bolts. The installation and removal operations of the present invention are simple and convenient, which is convenient for maintenance by staff;

[0009] Related technology 4 (publication number: CN1472755A) discloses a transformer coil frame, and the disclosed technical solution is as follows: the system is an insulator made of insulating plastic material with a horizontal core slot; downwardly bent input terminals and output terminals are respectively provided on both sides; protrusions are integrally extended on both side surfaces of the body and are located between the core of the core group and the output terminals, and the input terminals, and at least one extending direction is different from the direction of the side surface of the core; the secondary coil is wound around the outer surface of the core slot of the body and is electrically connected to the output terminal; the primary coil is concentrically wound around the outer surface of the secondary coil and is electrically connected to the input terminal; the core group is an electromagnetic induction element inserted into the core slot of the body.

[0010] In the above disclosed technical solutions, the following problems are found in the related technologies: when the three-phase coil is installed, the three-phase coil needs to be fixed inside the transformer through the corresponding three-phase frame. Due to the different specifications of the iron core wound around the coil, there are square and round ones. In order to ensure adaptability, a coil frame of a corresponding shape needs to be adapted thereto to ensure the stability of the coil in the transformer;

[0011] After the three-phase coil is installed in the transformer, after a long period of use, once the coil becomes loose, it will directly affect the use efficiency of the transformer. For this purpose, we provide a new three-phase wire frame structure for the internal coil of the transformer.

[0012] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background technology section of this application, and therefore may include prior art information that does not constitute known to ordinary technicians in the field. Summary of the invention

[0013] The present invention aims to solve at least one of the technical problems existing in the prior art or related art. In order to solve the problem of stable installation of transformer coils in the above-mentioned prior art, the present invention provides a three-phase wire frame structure of the internal coil of the transformer, which adopts a transformer coil installation locking mechanism combined with a stable structure of the coil and the three-phase frame to achieve the effect of stably positioning the coil in the transformer. The specific technical solution is as follows:

[0014] A three-phase bobbin structure for a transformer internal coil comprises a bobbin arranged in an inner cavity of the transformer, the bobbin is evenly provided with coil clamps, the top of the coil clamps is provided with a closed end cap, the closed end cap is fixedly mounted on the bottom of the top frame, the outer wall of the coil clamp is evenly circumferentially provided with hidden slot groups, the inner cavity of the hidden slot group is longitudinally and alternately embedded with square clamp blocks and arc-shaped clamp blocks in sequence;

[0015] A downhill extrusion seat is provided below each group of the square blocks, an uphill extrusion seat is provided between each downhill extrusion seat and each adjacent group of the arc-shaped blocks, and a linkage retraction and extension driving member is provided in the inner cavity of the coil clamp column to drive the uphill extrusion seat and the downhill extrusion seat to move synchronously;

[0016] An ohmic elastic pre-connector is fixedly connected to the top of the outer wall of the coil frame, a pre-connector socket engaged with the ohmic elastic pre-connector socket is arranged at the bottom of the inner wall of the transformer, and the inner cavity of the pre-connector socket is provided with a sliding limit clamping assembly for clamping the ohmic elastic pre-connector socket.

[0017] In the above technical solution, the outer wall of the closed end cap is sleeved with a base, the bottom of the base is symmetrically slidably provided with a coil anti-loosening frame, and the top of the base is provided with a coil limiting component for adjusting the position of the coil anti-loosening frame.

[0018] The coil limiting component includes an adjusting slide groove which is evenly opened on the top of the base in a circumferential direction, and the adjusting slide groove is arranged in a circumferential direction with the base as the center. A movable shaft is slidably arranged in the inner cavity of the adjusting slide groove, and limiting slide plates are arranged at both ends of the movable shaft, and the limiting slide plates are attached to the surface of the base. The four limiting slide plates located on the top of the base are rotatably connected to four hinges of a four-link frame, and a limiting driving component is arranged on the top of the base to drive one of the hinges of the four-link frame to displace.

[0019] The limit drive component includes a support seat fixedly connected to the top of the base, the inner cavity of the support seat is threadedly connected with a threaded column, one end of the threaded column close to the four-link frame is rotatably connected to a displacement seat, and the displacement seat is connected to a hinge of the four-link frame.

[0020] The linked retraction and extension driving component includes a screw rotatably arranged in the inner cavity of the coil clamp, the uphill extrusion seat and the downhill extrusion seat are both threadedly connected to the outside of the screw, the inner cavity of the coil clamp is embedded with an anti-deflection guide rod parallel to the screw, and the uphill extrusion seat and the downhill extrusion seat are both sleeved on the outside of the anti-deflection guide rod.

[0021] The top of the square card block and the bottom of the arc-shaped card block are both provided with guide sliders, the top of the inner wall of the hidden groove group where the square card block is located and the bottom of the inner wall of the hidden groove group where the arc-shaped card block is located are both provided with guide grooves corresponding to the guide sliders, the top of the square card block and the bottom of the arc-shaped card block are both fixedly installed with one end of a spring sheet, and the other end of the spring sheet is fixedly installed on the inner wall of the coil clamp column.

[0022] The sliding limit clamping assembly includes a bevel guide seat embedded in the inner cavity of the pre-connected card seat, the space formed by the bevel of the bevel guide seat and the inner wall of the pre-connected card seat gradually increases along the inner side, the right-angled side of the bevel guide seat facing the entrance side is arc-shaped, a suspended card seat is arranged on the bevel of the bevel guide seat, a shrinkage clamping hole is opened on the side wall of the suspended card seat, clamping columns are symmetrically arranged at positions close to the edges of both sides of the ohm-type elastic pre-connected seat, and the clamping columns correspond to the shrinkage clamping holes, a limiting slider is arranged on the top of the clamping column, and a guide limit seat is symmetrically arranged on the side of the pre-connected card seat facing the ohm-type elastic pre-connected seat, and the limiting opening formed between the guide limit seats corresponds to the reverse arc plate of the ohm-type elastic pre-connected seat.

[0023] The top frame is evenly provided with cable management seats on both sides, the top frame is symmetrically provided with guide rods on both sides, the guide rods are externally sleeved with adjustment seats, the side walls of the adjustment seats are threadedly connected with positioning bolts, and the cable management seats are fixedly installed on the side walls of the adjustment seats.

[0024] A locking cap is rotatably connected to the outer wall of the closed end cap near the bottom, and balls are evenly arranged circumferentially between the locking cap and the closed end cap. An internal thread is provided on the inner wall of the locking cap, and an external thread corresponding to the internal thread on the locking cap is provided on the top of the outer wall of the coil clamp.

[0025] The right-angled side of the square block close to the downhill extrusion seat is arc-shaped, and the right-angled side of the arc-shaped block close to the uphill extrusion seat is arc-shaped. Anti-slip nails are arranged on the outward surfaces of the square block and the arc-shaped block.

[0026] Compared with the prior art, the invention has the following beneficial effects: the three-phase bobbin structure of the internal coil of the transformer:

[0027] 1. After the three-phase coil is sleeved on the outside of the three coil clamps, the three downhill extrusion seats and uphill extrusion seats are moved upward or downward according to the specifications of the core mounting hole where the three-phase coil is located, so as to adapt to the fixation of the three-phase coil of the transformer, while ensuring the stability of the three-phase coil, the efficiency of the transformer installation process is improved, and the installation process is convenient for relevant personnel.

[0028] 2. When installing the coil frame, move the coil frame toward the inside of the transformer. After the reverse arc plates on both sides of the ohm-type elastic pre-connector slide into the pre-connector socket, clamp the reverse arc plates on both sides of the ohm-type elastic pre-connector socket through the sliding limit clamping assembly. By pre-installing the coil frame, the stability of the subsequent installation of the coil frame in the transformer is guaranteed, thereby bringing convenience to the installation process for relevant personnel.

[0029] 3. The two coil anti-loosening frames are moved relative to each other through the coil limiting component. After the three-phase coil is installed on the coil frame, the two coil anti-loosening frames on each coil clamping column are adjusted so that the two coil anti-loosening frames are snugly connected to both sides of each coil of the three-phase coil, thereby preventing the three-phase coil from loosening.

[0030] Fourth, the limit driving component drives a hinge point of the four-link frame to move, causing the four-link frame to deform, so that the four hinge points of the four-link frame respectively drive the four movable shafts to slide on the inner walls of the corresponding adjustment slots, thereby driving the two coil anti-loosening frames to move relative to each other through the two limit sliding plates on the front and rear sides, and adjusting according to the specifications of each coil, thereby ensuring the stability of the coil and preventing the coil from loosening.

[0031] 5. When the screw is rotated to adjust the position of the uphill extrusion seat and the downhill extrusion seat, the uphill extrusion seat and the downhill extrusion seat are made to slide on the outside of the four anti-deflection guide rods at the same time. The anti-deflection guide rods parallel to the screw ensure the stability of the moving direction of the uphill extrusion seat and the downhill extrusion seat, thereby ensuring the stability of the position of the three-phase coil.

[0032] 6. When repairing the three-phase coil, in the process of dispersing and fixing the three-phase coil by the square clamp block and the arc clamp block, the square clamp block and the arc clamp block drive the spring piece to generate elastic force. When the three-phase coil is removed for inspection, the lead screw is turned to move the square clamp block and the arc clamp block away from the corresponding uphill extrusion seat and the downhill extrusion seat center position. At this time, the elastic force of the spring piece is used to make the square clamp block and the arc clamp block retract into the coil clamp column, thereby making the operation of removing the three-phase coil more convenient.

[0033] 7. Adjust according to the wiring position. After adjusting to the appropriate position, turn the positioning bolt on the adjustment seat to lock the position of each wire management socket, and then insert the connecting wire into the inner cavity from the bayonet of the wire management socket. By arranging the connecting wires, the neatness of the inside of the transformer is ensured, thereby ensuring the safety of the use process.

[0034] 8. The locking cap and the coil clamping column are fixed by the internal thread of the inner wall of the locking cap and the external thread of the top of the outer wall of the coil clamping column, thereby ensuring the stability of the three-phase coil on the coil frame and preventing the three-phase coil from being separated from the coil frame.

[0035] 9. By evenly installing anti-slip pins on each surface connected with the three-phase coil, the stability between the three-phase coil and the coil clamping column on the coil frame is ensured, preventing the three-phase coil from falling off, thereby ensuring the working efficiency of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of a three-phase bobbin structure of an internal coil of a transformer according to the present invention;

[0037] Figure 2 Schematic diagram of the explosion of a three-phase bobbin structure of a transformer internal coil according to the present invention Figure 1 ;

[0038] Figure 3 Schematic diagram of the explosion of a three-phase bobbin structure of a transformer internal coil according to the present invention Figure 2 ;

[0039] Figure 4 It is a structural schematic diagram of the ohmic elastic pre-connector and the pre-connector card seat of the present invention;

[0040] Figure 5 The structure of the coil clamp part of the present invention is shown in cross section Figure 1 ;

[0041] Figure 6 The structure of the coil clamp part of the present invention is shown in cross section Figure 2 ;

[0042] Figure 7It is a structural schematic diagram of the coil anti-loosening frame part of the present invention;

[0043] Figure 8 It is a structural schematic diagram of the cable management card seat part of the present invention;

[0044] Fig. 9 It is a schematic diagram of the structure explosion of the coil release frame part of the present invention;

[0045] Fig.10 It is a structural schematic diagram of the square card block and the arc card block part of the present invention;

[0046] Fig.11 It is a schematic structural diagram of the ohmic elastic pre-connector and the bevel guide seat of the present invention;

[0047] Fig.12 for Figure 5 A local enlarged view of point A;

[0048] Fig.13 for Fig. 9 A partial enlarged view of point B;

[0049] in, Figures 1 to 13 The corresponding relationship between the reference numerals and the component names is as follows: 1-coil frame, 10-ohm elastic pre-connector seat, 11-pre-connector seat, 12-base, 13-coil anti-loosening frame, 14-locking cap, 15-cable management seat, 16-guide rod, 17-adjustment seat, 18-positioning bolt, 19-fixing plate, 2-top frame, 21-ball, 22-slideway, 23-annular support, 3-coil clamping column, 31-hidden slot group, 32-square clamping block, 33-arc clamping block, 34-downhill extrusion seat, 35-uphill extrusion seat, 36-anti-slip Pin, 4-closed end cap, 5-linked retraction and extension drive component, 51-screw, 52-anti-deflection guide rod, 53-spring, 54-guide slider, 55-guide slide groove, 6-sliding limit clamping assembly, 61-bevel guide seat, 62-suspended clamping seat, 63-contraction clamping hole, 64-clamping column, 65-guide limit seat, 7-coil limit component, 71-adjusting slide groove, 72-limiting slide plate, 73-movable shaft, 74-four-link frame, 8-limiting drive component, 81-support seat, 82-threaded column, 83-displacement seat, 84-spherical block. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] The following is a combination of specific implementation cases and attached Figure 1-13 The present invention is further described below, but the present invention is not limited to these embodiments.

[0052] A three-phase coil frame structure for an internal coil of a transformer comprises a coil frame 1 arranged in an inner cavity of the transformer, the bottom of the coil frame 1 is a plane, three coil clamping posts 3 are vertically fixed on the top of the coil frame 1 in parallel with each other, and the three coil clamping posts 3 are on the same horizontal straight line.

[0053] Coil clamps 3 are evenly arranged on the coil frame 1, and closed end caps 4 are arranged on the top of the coil clamps 3, and the closed end caps 4 are fixedly installed on the bottom of the top frame 2. Three closed end caps 4 corresponding to the coil clamps 3 are vertically fixed to the bottom of the top frame 2 in parallel with each other, and the three closed end caps 4 are driven by the top frame 2 to be connected to the top of the coil clamps 3 at the same time. After the three-phase coils are sequentially sleeved on the outside of the three coil clamps 3, the three closed end caps 4 are driven by the top frame 2 to close the coil clamps 3.

[0054] The outer wall of the coil clamp 3 is uniformly circumferentially provided with hidden slot groups 31. Multiple hidden slot groups 31 are sequentially provided on the outer wall of the coil clamp 3 from top to bottom, and each hidden slot group 31 is in a circumferential array. Each hidden slot group 31 includes four circumferential hidden slots, and each hidden slot is connected to the inner cavity of the coil clamp 3.

[0055] The inner cavity of the hidden groove group 31 is sequentially and longitudinally staggered with square blocks 32 and arc blocks 33. The four hidden grooves of the top hidden groove group 31 are movably embedded with square blocks 32, and the four hidden grooves of the hidden groove group 31 adjacent to it are movably embedded with arc blocks 33. The remaining hidden groove groups 31 are sequentially and staggeredly embedded with square blocks 32 and arc blocks 33. The width of the hidden groove corresponds to the specifications of the square blocks 32 and arc blocks 33, so that each square block 32 and arc block 33 can slide in each hidden groove.

[0056] The surface of the arc-shaped block 33 facing outward is arc-shaped. The arc-shaped blocks 33 in the four hidden grooves of the circumferential array are arrayed with the same center, and the curvature of the four arc-shaped blocks 33 is the same.

[0057] A downhill extrusion seat 34 is provided below each group of square blocks 32, and an uphill extrusion seat 35 is provided between each downhill extrusion seat 34 and each adjacent group of arc-shaped blocks 33. A downhill extrusion seat 34 with an oblique upward path is provided below the center of each group of four circumferentially arrayed square blocks 32, and the downhill extrusion seat 34 is conical, and the upper diameter of the uphill extrusion seat 35 is smaller than the lower diameter.

[0058] An uphill extrusion seat 35 is arranged above the center of each group of four circumferentially arrayed arc-shaped blocks 33. The inclined surface of the uphill extrusion seat 35 is an inclined downward path, that is, the uphill extrusion seat 35 is conical, and the upper diameter of the uphill extrusion seat 35 is larger than the lower diameter. Two downhill extrusion seats 34 and an uphill extrusion seat 35 with large diameter surfaces facing each other are arranged between each group of square blocks 32 and each group of arc-shaped blocks 33.

[0059] The inner cavity of the coil clamp column 3 is provided with a linkage retracting and extending driving member 5 that drives the uphill extrusion seat 35 to move synchronously with the downhill extrusion seat 34. The linkage retracting and extending driving member 5 enables the three downhill extrusion seats 34 and the uphill extrusion seats 35 located at the center of the coil clamp column 3 to move up and down simultaneously.

[0060] With the above structure, after the three-phase coil is sleeved on the outside of the three coil clamping columns 3, the three downhill extrusion seats 34 and the uphill extrusion seats 35 are moved upward or downward according to the specifications of the iron core mounting hole where the three-phase coil is located. When the iron core mounting hole is square, the three downhill extrusion seats 34 and the uphill extrusion seats 35 are moved upward, and four circumferentially arrayed square blocks 32 are squeezed from the center through the inclined surface of the downhill extrusion seats 34, so that each group of square blocks 32 on the coil clamping column 3 is simultaneously spread outward in the circumferential direction, so that the square blocks 32 are clamped on the inner wall of the mounting hole of the iron core where the three-phase coil is located, and the three-phase coil is fixed.

[0061] When the mounting hole of the iron core where the three-phase coil is located is circular, the three downhill extrusion seats 34 and the uphill extrusion seats 35 are moved downward, so that the uphill extrusion seats 35 squeeze four circumferentially arrayed arc blocks 33 from the center, and the mounting hole of the iron core where the three-phase coil is located is locked by the arc surface of the arc block 33.

[0062] According to the specifications of the three-phase coil winding core, three downhill extrusion seats 34 or uphill extrusion seats 35 are selected to move, so that the process of the three-phase coil of the transformer is adaptable, while ensuring the stability of the three-phase coil, the efficiency of the transformer installation process is improved, thereby bringing convenience to the installation process of relevant personnel.

[0063] Refer to the attached Figure 1 To Attachment Figure 4 , and attached Fig.11 As shown: an ohmic elastic pre-connector 10 is fixedly connected to the top of the outer wall of the coil frame 1. The ohmic elastic pre-connector 10 is a plate member with reverse arc plates installed on both sides of a semicircular plate body, and the ohmic elastic pre-connector 10 is made of elastic material. The semicircular plate body part of the ohmic elastic pre-connector 10 is fixedly installed on the top of the outer wall of the coil frame 1 by bolts, and the reverse arc plates on both sides face both sides.

[0064] The pre-connection card seat 11 that is matched with the ohm-type elastic pre-connection seat 10 is arranged at the bottom of the inner wall of the transformer, and the inner cavity of the pre-connection card seat 11 is provided with a sliding limit clamping assembly 6 for clamping the ohm-type elastic pre-connection seat 10. The pre-connection card seat 11 is fixedly installed at the bottom of the inner wall of the transformer. When the coil frame 1 is installed, the coil frame 1 is moved toward the inside of the transformer, so that the coil frame 1 drives the two ohm-type elastic pre-connection seats 10 on the outer wall to move toward the pre-connection card seat 11.

[0065] By adopting the above structure, after the reverse arc plates on both sides of the ohmic elastic pre-connector 10 slide into the pre-connector clamping seat 11, the reverse arc plates on both sides of the ohmic elastic pre-connector 10 are clamped by the sliding limit clamping assembly 6, and the coil frame 1 is pre-installed to ensure the stability of the subsequent installation of the coil frame 1 in the transformer, thereby bringing convenience to the installation process of relevant personnel.

[0066] Refer to the attached Figure 1 To Attachment Figure 3 And attached Figure 7 and attached Fig. 9 As shown: the outer wall of the closed end cap 4 is sleeved with a base 12, and the bottom of the base 12 is symmetrically slidably provided with a coil anti-loosening frame 13. The base 12 is fixedly sleeved on the outside of the closed end cap 4 through a mounting hole opened in the center, and the base 12 is located near the middle and upper part of the closed end cap 4. A coil limiting member 7 for adjusting the position of the coil anti-loosening frame 13 is provided on the top of the base 12. The two coil anti-loosening frames 13 are relatively fitted on the bottom of the base 12 and slide. The coil anti-loosening frames 13 are arranged on the front and rear sides of the bottom of the base 12. The lateral distance between the three coil clamping columns 3 is small, and the coil anti-loosening frame 13 cannot be installed. Therefore, only two relative coil anti-loosening frames 13 can be set on the front and rear sides.

[0067] By adopting the above structure, the two coil anti-loosening frames 13 are allowed to move relative to each other through the coil limiting component 7. After the three-phase coil is installed on the coil frame 1, the two coil anti-loosening frames 13 on each coil clamping column 3 are adjusted so that the two coil anti-loosening frames 13 are tightly clamped on both sides of each coil of the three-phase coil, thereby preventing the three-phase coil from loosening.

[0068] Refer to the attached Figure 1 To Attachment Figure 3 And attached Fig. 9 As shown: the coil limiting member 7 includes adjustment slots 71 uniformly arranged on the top of the base 12 in the circumferential direction, and the adjustment slots 71 are arranged circumferentially with the base 12 as the center. Four adjustment slots 71 penetrating the inner cavity are longitudinally arranged on the top of the base 12, and the four adjustment slots 71 are arranged circumferentially with the base 12 as the center, and the directions of the four adjustment slots 71 are four directions: front, back, left, and right.

[0069] The inner cavity of the adjustment chute 71 is slidably provided with a movable shaft 73, and both ends of the movable shaft 73 are provided with a limit slide plate 72, and the limit slide plate 72 is attached to the surface of the base 12. The four limit slide plates 72 located at the top of the base 12 are rotatably connected to the four hinges of the four-link frame 74, and the top of the base 12 is provided with a limit driving member 8 that drives one of the hinges of the four-link frame 74 to move. The movable shaft 73 is movably embedded in the inside of the adjustment chute 71, so that the movable shaft 73 slides in contact with the inner wall of the adjustment chute 71, and the limit slide plates 72 are fixedly installed at both ends of the movable shaft 73, and the two limit slide plates 72 slide in contact with the upper and lower surfaces of the base 12 through the movable shaft 73.

[0070] The four-link frame 74 is a link frame composed of four frame rods hinged end to end in sequence. The two ends of the four frame rods of the four-link frame 74 are movably connected to the outside of the shaft body end to end through the opened mounting holes, and the adjacent ends of every two frame rods are movably connected to the outside of the same shaft body. The four-link frame 74 can be stretched horizontally or vertically through the four frame rods connected end to end.

[0071] The four hinge points of the four-link frame 74 are connected to four limiting slides 72 located on the top of the base 12, that is, the bottom plates of the four hinge points of the four-link frame 74 are connected to the limiting slides 72, so that the four movable shafts 73 and the four adjustment slots 71 limit the four directions of the four-link frame 74.

[0072] With the above structure, the limit driving member 8 drives one hinge point of the four-link frame 74 to move, so that the four-link frame 74 is deformed, so that the four hinge points of the four-link frame 74 respectively drive the four movable shafts 73 to slide on the inner wall of the corresponding adjustment slot 71. Thus, the two limit slide plates 72 on the front and rear sides respectively drive the two coil anti-loosening frames 13 to move relative to each other, and adjust according to the specifications of each coil, thereby ensuring the stability of the coil and preventing the coil from loosening.

[0073] Refer to the attached Figure 1 To Attachment Figure 3 And attached Fig. 9 and attached Fig.13 As shown, the limit driving member 8 includes a support seat 81 fixed to the top of the base 12, the inner cavity of the support seat 81 is threadedly connected with a threaded column 82, and the end of the threaded column 82 close to the four-link frame 74 is rotatably connected with a displacement seat 83, and the displacement seat 83 is connected to a hinge of the four-link frame 74. The support seat 81 is vertically fixedly installed on the surface of the base 12 and at a position corresponding to one of the hinge points of the four-link frame 74, and the threaded column 82 penetrates the inner cavity of the support seat 81 and is threadedly connected to the through hole of the support seat 81.

[0074] A spherical block 84 is fixedly installed on one end of the threaded column 82 near the four-link frame 74, and a displacement seat 83 is fixedly installed on the top plate of the four-link frame 74 near the hinge point of the threaded column 82. The displacement seat 83 has a spherical cavity on the surface facing the threaded column 82, so that the spherical block 84 can be movably embedded in the inner cavity of the displacement seat 83. The spherical block 84 can rotate freely in the inner cavity of the displacement seat 83.

[0075] By adopting the above structure, when adjusting the distance between the two coil anti-loosening frames 13, the threaded column 82 is screwed on the support seat 81, so that the threaded column 82 drives the spherical block 84 to rotate and move, so that the spherical block 84 pushes the displacement seat 83 to move while the inner wall of the displacement seat 83 rotates, so that the displacement seat 83 drives a hinge point of the four-link frame 74 to move, so that the four-link frame 74 is folded and deformed, so that the two coil anti-loosening frames 13 move relative to each other, so that they are snugly connected to the outside of the coil.

[0076] Refer to the attached Figure 5 , Attachment Figure 6 And attached Fig.12 As shown: It is worth noting that the linkage retraction and extension driving member 5 includes a lead screw 51 rotatably arranged in the inner cavity of the coil clamp column 3. Bearings are embedded and installed on the inner walls of the upper and lower sides of the coil clamp column 3, and the two ends of the lead screw 51 are respectively embedded and installed in the bearings. The top of the lead screw 51 passes through the top of the coil clamp column 3 and extends to the outside. An operating rod is fixedly installed on the end of the lead screw 51 extending outside the top of the coil clamp column 3, and the lead screw 51 is driven to rotate by the operating rod. A groove cavity that can accommodate the operating rod is opened at the bottom of the closed end cap 4.

[0077] The uphill extrusion seat 35 and the downhill extrusion seat 34 are both threadedly connected to the outside of the lead screw 51, and the inner cavity of the coil clamp column 3 is embedded with an anti-deflection guide rod 52 parallel to the lead screw 51, and the uphill extrusion seat 35 and the downhill extrusion seat 34 are sleeved on the outside of the anti-deflection guide rod 52. Four anti-deflection guide rods 52 are arrayed in the inner cavity of the coil clamp column 3 with the lead screw 51 as the center.

[0078] The uphill extrusion seat 35 and the downhill extrusion seat 34 are sequentially threadedly connected to the outside of the lead screw 51, and the uphill extrusion seat 35 and the downhill extrusion seat 34 are simultaneously movably sleeved on the outside of the four anti-deflection guide rods 52 through the opened mounting holes.

[0079] With the above structure, when adjusting the uphill extrusion seat 35 and the downhill extrusion seat 34 to drive the four square blocks 32 and the arc-shaped blocks 33 to move, the lead screw 51 is rotated by the operating rod extending from the top of the coil clamp column 3. When the mounting hole in the three-phase coil core is square, the lead screw 51 is rotated clockwise by the operating rod, so that the uphill extrusion seat 35 and the downhill extrusion seat 34 on the lead screw 51 move upward, so that the inclined surface of the downhill extrusion seat 34 applies an extrusion force to the center of the four square blocks 32, and the four square blocks 32 are spread out to the surroundings through the arc-shaped force-bearing surfaces of the four square blocks 32, so that the four square blocks 32 slide out of the four corresponding hidden grooves from the outside of the coil clamp column 3, and are clamped on the inner wall of the mounting hole in the three-phase coil core.

[0080] When the mounting sleeve hole in the three-phase coil core is circular, the operating rod drives the lead screw 51 to rotate counterclockwise, so that the uphill extrusion seat 35 and the downhill extrusion seat 34 on the lead screw 51 move downward, so that the inclined surface of the uphill extrusion seat 35 applies an extrusion force to the center of the four arc-shaped clamping blocks 33. The four arc-shaped clamping blocks 33 are spread out to the surroundings through the arc-shaped force-bearing surfaces of the four arc-shaped clamping blocks 33, so that the four arc-shaped clamping blocks 33 slide out of the outside of the coil clamping column 3 from the four corresponding hidden grooves, and are clamped on the inner wall of the mounting sleeve hole in the three-phase coil core.

[0081] The operation is performed according to the shape of the three-phase coil core installation sleeve hole, thereby improving the applicability of the three-phase coil installation. When the lead screw 51 is rotated to adjust the position of the uphill extrusion seat 35 and the downhill extrusion seat 34, the uphill extrusion seat 35 and the downhill extrusion seat 34 are simultaneously fitted on the outside of the four anti-deflection guide rods 52 and slide. The anti-deflection guide rods 52 parallel to the lead screw 51 ensure the stability of the moving direction of the uphill extrusion seat 35 and the downhill extrusion seat 34, thereby ensuring the stability of the position of the three-phase coil.

[0082] Refer to the attached Fig.10 and attached Fig.12 As shown in the figure, the top of the square block 32 and the bottom of the arc block 33 are both provided with a guide slide block 54, and the top of the inner wall of the hidden slot group 31 where the square block 32 is located and the bottom of the inner wall of the hidden slot group 31 where the arc block 33 is located are both provided with a guide slot 55 corresponding to the guide slide block 54. The top of the square block 32 and the bottom of the arc block 33 are both fixedly mounted with one end of the spring piece 53, and the other end of the spring piece 53 is fixedly mounted on the inner wall of the coil clamp column 3.

[0083] The guide slider 54 is respectively fixed on the top center position of the square block 32 and the bottom center position of the arc block 33, and matching guide grooves 55 are provided in the corresponding hidden grooves. The sliding cooperation between the guide slider 54 and the guide groove 55 ensures the stability of the sliding direction of the square block 32 and the arc block 33, avoids position deviation, and thus ensures the stability of the three-phase coil installation.

[0084] The spring piece 53 is a metal spring piece, which can be elastically deformed like a compression spring. One end of the spring piece 53 is fixedly mounted on the position of the square block 32 and the arc block 33 near the side of the lead screw 51, and the other end of the spring piece 53 is fixedly mounted on the inner wall of the coil clamp column 3.

[0085] With the above structure, when the three-phase coil is repaired, in the process of loosening and fixing the three-phase coil by the square clamp block 32 and the arc clamp block 33, the square clamp block 32 and the arc clamp block 33 drive the spring piece 53 to generate elastic force.

[0086] When the three-phase coil is removed for inspection, the lead screw 51 is turned to move the square clamping block 32 and the arc clamping block 33 away from the corresponding center positions of the uphill extrusion seat 35 and the downhill extrusion seat 34. At this time, the elastic force of the spring sheet 53 is used to make the square clamping block 32 and the arc clamping block 33 retract into the coil clamping column 3, thereby making the operation of removing the three-phase coil more convenient.

[0087] Refer to the attached Figure 4 and attached Fig.10 As shown: In addition, the sliding limit clamping assembly 6 includes a bevel guide seat 61 embedded in the inner cavity of the pre-connected card seat 11. The bevel guide seat 61 is fixedly embedded and installed on the inner wall of the pre-connected card seat 11, and the bevel of the bevel guide seat 61 forms an angle with the bottom surface of the pre-connected card seat 11. The space formed by the bevel of the bevel guide seat 61 and the inner wall of the pre-connected card seat 11 gradually increases along the inner side. The space between the bevel guide seat 61 and the inner cavity of the pre-connected card seat 11 gradually increases in slope, that is, the bevel of the bevel guide seat 61 faces the inner cavity of the pre-connected card seat 11.

[0088] The right-angled side of the bevel guide seat 61 facing the entrance is arc-shaped, and the arc surface is set so that the reverse arc plates on both sides of the ohmic elastic pre-connector seat 10 can slide into the interior of the pre-connector seat 11 through the arc surface. A suspended card seat 62 is set on the inclined surface of the bevel guide seat 61, and a shrinkage card hole 63 is opened on the side wall of the suspended card seat 62. The rear baffle is fixedly installed on the surface of the pre-connector seat 11 away from the ohmic elastic pre-connector seat 10, and the suspended card seat 62 is fixedly installed on the surface of the rear baffle by a fixing rod, so that the suspended card seat 62 is arranged parallel to the inclined surface of the bevel guide seat 61 at a certain distance. A shrinkage card hole 63 with a gradually decreasing aperture is opened on the surface of the suspended card seat 62, and a circular card hole is opened at the end of the shrinkage card hole 63.

[0089] The ohmic elastic pre-connector 10 is symmetrically provided with clamping posts 64 near the edges on both sides, and the clamping posts 64 correspond to the shrinkage clamping holes 63. A limiting slider is provided on the top of the clamping posts 64. The pre-connector 11 is symmetrically provided with guide limit seats 65 on one side facing the ohmic elastic pre-connector 10, and the limiting opening formed between the guide limit seats 65 corresponds to the reverse arc plate of the ohmic elastic pre-connector 10. Through the guide limit seats 65 located on both sides of the clamping opening of the pre-connector 11, the reverse arc plates on both sides of the ohmic elastic pre-connector 10 are respectively fitted between the two guide limit seats 65 and enter the interior of the pre-connector 11, avoiding position deviation, thereby ensuring the stability of the pre-installation process.

[0090] The tops of the reverse arc plates on both sides of the ohmic elastic pre-connector 10 are vertically fixed with clamping columns 64, and spherical limiting sliders are fixedly installed on the tops of the clamping columns 64. The two clamping columns 64 are both located near the edge of the reverse arc plates of the ohmic elastic pre-connector 10.

[0091] With the above structure, when the coil frame 1 is pre-installed, the coil frame 1 drives the ohmic elastic pre-connector seat 10 to move toward the pre-connector seat 11. When the ohmic elastic pre-connector seat 10 drives the reverse arc plates on both sides to contact the bottom of the inner wall of the transformer, the reverse arc plates on both sides of the ohmic elastic pre-connector seat 10 are elastically deformed by force, and the reverse arc plates on both sides of the ohmic elastic pre-connector seat 10 are limited by the bevel guide seat 61, so that the reverse arc plates on both sides of the ohmic elastic pre-connector seat 10 move along the bevel of the bevel guide seat 61 respectively.

[0092] As the coil frame 1 moves downward, the reverse arc plates on both sides of the ohmic elastic pre-connector 10 drive the surface clamping columns 64 to slide into the shrinking clamping holes 63 respectively. As the shrinking clamping holes 63 deform, the clamping columns 64 are finally clamped on the suspended clamping seat 62, so that the coil frame 1 is in a stable position during pre-installation, thereby ensuring the stability of the three-phase coil frame installation.

[0093] Refer to the attached Figure 1 To Attachment Figure 3 And attached Figure 7 and attached Figure 8 As shown in the figure: the two sides of the top frame 2 are evenly provided with cable management clamps 15, the surface of the cable management clamps 15 facing the outside is provided with a bayonet, the two sides of the top frame 2 are symmetrically provided with guide rods 16, and the outside of the guide rods 16 is sleeved with an adjustment seat 17. The side wall of the adjustment seat 17 is threadedly connected with a positioning bolt 18, and the cable management clamps 15 are fixedly installed on the side wall of the adjustment seat 17.

[0094] Two mutually parallel fixing plates 19 are vertically fixedly installed on both side surfaces of the top frame 2, and two mutually parallel guide rods 16 are fixedly installed between the fixing plates 19. The adjustment seat 17 is movably sleeved on the outside of the two guide rods 16 through the mounting holes through the inner cavity provided on the surface, so that the adjustment seat 17 slides on the outer wall of the guide rod 16. The positioning bolt 18 is threadedly connected to the top of the adjustment seat 17, and the bayonet of the cable management seat 15 faces outward.

[0095] With the above structure, when arranging the wiring, the adjustment seat 17 is slid outside the guide rod 16, so that the adjustment seat 17 drives the wire management clamp 15 to move, and is adjusted according to the wiring position. After adjusting to a suitable position, the positioning bolt 18 on the adjustment seat 17 is screwed to lock the position of each wire management clamp 15. Then, the connecting wire is inserted into the inner cavity from the bayonet of the wire management clamp 15. By arranging the connecting wires, the neatness inside the transformer is ensured, thereby ensuring the safety during use.

[0096] Refer to the attached Figure 3 , Attachment Figure 8 and attached Fig. 9 As shown: In addition, a locking cap 14 is rotatably connected to the outer wall of the closed end cap 4 near the bottom. The annular support 23 is fixedly sleeved on the bottom of the outer wall of the closed end cap 4 through the central mounting hole, and a circle of movable grooves are successively and sequentially opened on the outer wall of the annular support 23. Balls 21 are evenly arranged circumferentially between the locking cap 14 and the closed end cap 4, and a circumferential sliding groove 22 is opened on the inner wall of the locking cap 14. The sliding groove 22 and multiple movable grooves on the outer circumference of the annular support 23 form multiple movable cavities, and a ball 21 is movably embedded in each movable cavity.

[0097] The inner wall of the locking cap 14 is provided with an internal thread, and the top of the outer wall of the coil clamping column 3 is provided with an external thread corresponding to the internal thread on the locking cap 14 .

[0098] With the above structure, when the closing end cap 4 is connected and closed with the coil clamp column 3, the locking cap 14 is moved to the top of the outer wall of the coil clamp column 3. Then, the locking cap 14 is rotated outside the closing end cap 4, and the locking cap 14 is fixed to the coil clamp column 3 through the internal thread of the inner wall of the locking cap 14 and the external thread at the top of the outer wall of the coil clamp column 3, thereby ensuring the stability of the three-phase coil on the coil frame 1 and preventing the three-phase coil from being separated from the coil frame 1.

[0099] Refer to the attached Fig.10As shown: Further, a right-angled side of the square block 32 close to the downhill extrusion seat 34 is arc-shaped, and a right-angled side of the arc-shaped block 33 close to the uphill extrusion seat 35 is arc-shaped. The right-angled side at the lower right corner of the downhill extrusion seat 34 is set as an arc surface, and the right-angled side at the upper right corner of the uphill extrusion seat 35 is set as an arc surface, so that the uphill extrusion seat 35 and the downhill extrusion seat 34 can squeeze and disperse the four arc-shaped blocks 33 and the square block 32 of the circumferential array more smoothly, thereby ensuring the stability of the three-phase coil installation process.

[0100] Anti-slip pins 36 are provided on the outward surfaces of the square block 32 and the arc block 33. By evenly installing the anti-slip pins 36 on each surface that is clamped with the three-phase coil, the stability between the three-phase coil and the coil clamp column 3 on the coil frame 1 is ensured, the three-phase coil is prevented from falling off, and the working efficiency of the transformer is ensured.

[0101] The present embodiment provides a three-phase bobbin structure for the internal coil of a transformer, and the method of use is as follows: two pre-connection sockets 11 are fixedly installed at the bottom of the inner wall of the transformer, and then the coil frame 1 is moved toward the inside of the transformer, so that the coil frame 1 drives the two ohm-type elastic pre-connection sockets 10 on the outer wall to move toward the pre-connection sockets 11, and the reverse arc plates on both sides of the ohm-type elastic pre-connection sockets 10 are limited by the bevel guide seat 61, so that the reverse arc plates on both sides of the ohm-type elastic pre-connection sockets 10 move along the bevel guide seat 61 respectively, and as the coil frame 1 moves downward, the reverse arc plates on both sides of the ohm-type elastic pre-connection sockets 10 respectively drive the surface clamping columns 64 to slide into the shrinkage clamping holes 63, and as the shrinkage clamping holes 63 are deformed, the clamping columns 64 are finally clamped on the suspended clamping seats 62, and the coil frame 1 is pre-installed in the transformer;

[0102] Then the three-phase coil is simultaneously sleeved on the three coil clamping columns 3 of the coil frame 1, and then the lead screw 51 is rotated by the operating rod extending from the top of the coil clamping column 3. When the mounting hole in the three-phase coil core is square, the lead screw 51 is rotated clockwise by the operating rod. When the mounting hole in the three-phase coil core is round, the lead screw 51 is rotated counterclockwise by the operating rod. The operation is performed according to the shape of the mounting hole in the three-phase coil core, and the three-phase coil is fixed to the coil frame 1 by the square clamp block 32 and the arc clamp block 33.

[0103] Afterwards, the three closed end caps 4 are driven by the top frame 2 to move to the positions corresponding to the three coil clamping columns 3, and the storage groove cavity at the bottom of the closed end cap 4 is covered outside the operating rod of the screw 51, and then the locking cap 14 is moved to the top of the outer wall of the coil clamping column 3, and then the locking cap 14 is rotated outside the closed end cap 4, and the locking cap 14 is fixed to the coil clamping column 3 through the internal thread of the inner wall of the locking cap 14 and the external thread at the top of the outer wall of the coil clamping column 3, and then the three-phase coil is fixed inside the transformer through the coil frame 1.

[0104] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0105] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0106] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0107] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-phase bobbin structure for an internal coil of a transformer, comprising a coil frame (1) arranged in an inner cavity of the transformer, the coil frame (1) being evenly provided with coil clamps (3), the top of the coil clamps (3) being provided with closed end caps (4), the internal coil of the transformer being wound around the outside of an iron core, the iron core being sleeved on the outside of the coil clamps (3) by providing a mounting hole penetrating the inner cavity, the closed end caps (4) being fixedly mounted on the bottom of a top frame (2), characterized in that: The outer wall of the coil clamping column (3) is uniformly provided with hidden groove groups (31) in the circumferential direction, and the inner cavity of the hidden groove group (31) is longitudinally and alternately embedded with square clamping blocks (32) and arc-shaped clamping blocks (33); A downhill extrusion seat (34) is provided below each group of the square clamping blocks (32), an uphill extrusion seat (35) is provided between each downhill extrusion seat (34) and each adjacent group of the arc-shaped clamping blocks (33), and a linkage retraction and extension driving member (5) is provided in the inner cavity of the coil clamping column (3) for driving the uphill extrusion seat (35) and the downhill extrusion seat (34) to move synchronously; An ohmic elastic pre-connector seat (10) is fixedly connected to the top of the outer wall of the coil frame (1), a pre-connector seat (11) engaged with the ohmic elastic pre-connector seat (10) is arranged at the bottom of the inner wall of the transformer, and a sliding limit clamping assembly (6) for clamping the ohmic elastic pre-connector seat (10) is arranged in the inner cavity of the pre-connector seat (11); The outer wall of the closed end cap (4) is sleeved with a base (12), and the base (12) is located above the coil inside the transformer, and a coil anti-loosening frame (13) is symmetrically slidably arranged at the bottom of the base (12), and the coil anti-loosening frame (13) is used to clamp the coil outside the coil clamping column (3), and a coil limiting component (7) for adjusting the position of the coil anti-loosening frame (13) is arranged on the top of the base (12); The coil limiting component (7) comprises an adjusting slide groove (71) uniformly arranged on the top of the base (12) in the circumferential direction, the adjusting slide groove (71) is arranged in a circumferential array with the base (12) as the center, a movable shaft (73) is slidably arranged in the inner cavity of the adjusting slide groove (71), both ends of the movable shaft (73) are provided with a limiting slide plate (72), and the limiting slide plate (72) is attached to the surface of the base (12), the four limiting slide plates (72) located on the top of the base (12) are rotatably connected to four hinges of a four-link frame (74), and a limiting driving component (8) is provided on the top of the base (12) for driving one of the hinges of the four-link frame (74) to move; The position-limiting driving component (8) comprises a support seat (81) fixedly connected to the top of the base (12); the inner cavity of the support seat (81) is threadedly connected to a threaded column (82); one end of the threaded column (82) close to the four-link frame (74) is rotatably connected to a displacement seat (83); the displacement seat (83) is connected to a hinge of the four-link frame (74); The linkage retraction and extension driving component (5) comprises a lead screw (51) rotatably arranged in the inner cavity of the coil clamp column (3); the uphill extrusion seat (35) and the downhill extrusion seat (34) are both threadedly connected to the outside of the lead screw (51); an anti-deflection guide rod (52) parallel to the lead screw (51) is embedded in the inner cavity of the coil clamp column (3); and the uphill extrusion seat (35) and the downhill extrusion seat (34) are both sleeved on the outside of the anti-deflection guide rod (52); A locking cap (14) is rotatably connected to the outer wall of the closed end cap (4) near the bottom, and balls (21) are evenly arranged circumferentially between the locking cap (14) and the closed end cap (4). An inner wall of the locking cap (14) is provided with an internal thread, and an outer wall top of the coil clamping column (3) is provided with an external thread corresponding to the internal thread on the locking cap (14).

2. The three-phase bobbin structure of the internal coil of a transformer according to claim 1, characterized in that: A guide slide block (54) is provided at the top of the square card block (32) and the bottom of the arc card block (33); a guide slide groove (55) corresponding to the guide slide block (54) is provided at the top of the inner wall of the hidden slot group (31) where the square card block (32) is located and the bottom of the inner wall of the hidden slot group (31) where the arc card block (33) is located; one end of a spring sheet (53) is fixedly mounted at the top of the square card block (32) and the bottom of the arc card block (33); and the other end of the spring sheet (53) is fixedly mounted on the inner wall of the coil clamp column (3).

3. The three-phase bobbin structure of the internal coil of a transformer according to claim 1, characterized in that: The sliding limit clamping assembly (6) comprises a bevel guide seat (61) embedded in the inner cavity of the pre-connection clamping seat (11); the space formed by the bevel of the bevel guide seat (61) and the inner wall of the pre-connection clamping seat (11) gradually increases along the inner side; the right-angled side of the bevel guide seat (61) facing the entrance side is arc-shaped; a suspended clamping seat (62) is arranged on the bevel of the bevel guide seat (61); a shrinkage clamping hole (63) is opened on the side wall of the suspended clamping seat (62); the ohm-type elastic The pre-connector seat (10) is symmetrically provided with clamping posts (64) at positions near the edges on both sides, and the clamping posts (64) correspond to the shrinkage clamping holes (63), and a limiting slider is provided on the top of the clamping posts (64), and a guide limiting seat (65) is symmetrically provided on one side of the pre-connector seat (11) facing the ohmic elastic pre-connector seat (10), and a limiting opening formed between the guide limiting seats (65) corresponds to the reverse arc plate of the ohmic elastic pre-connector seat (10).

4. The three-phase bobbin structure of the internal coil of a transformer according to claim 1, characterized in that: Cable management seats (15) are evenly arranged on both sides of the top frame (2), guide rods (16) are symmetrically arranged on both sides of the top frame (2), an adjustment seat (17) is sleeved on the outside of the guide rod (16), a positioning bolt (18) is threadedly connected to the side wall of the adjustment seat (17), and the cable management seat (15) is fixedly mounted on the side wall of the adjustment seat (17).

5. The three-phase bobbin structure of the internal coil of a transformer according to claim 1, characterized in that: The right-angled side of the square clamping block (32) close to the downhill extrusion seat (34) is arc-shaped, and the right-angled side of the arc-shaped clamping block (33) close to the uphill extrusion seat (35) is arc-shaped. Anti-slip nails (36) are provided on the surfaces of the square clamping block (32) and the arc-shaped clamping block (33) facing outward.

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