Insulation strengthening clamping structure for outgoing line of transformer

Abstract

The utility model provides a transformer outgoing line insulation strengthening clamping structure, which belongs to the technical field of insulation equipment and comprises a clamping body, a fixed base, an upper clamping plate, a lower clamping plate, an insulation bushing component and a locking mechanism. The fixed base is fixedly arranged on a transformer shell, and the clamping body is fixedly mounted at the upper end of the fixed base; the interior of the clamping body is hollow, an opening is formed in the top of the clamping body, and an annular sliding groove is formed in the inner wall of the clamping body. The upper clamping plate and the lower clamping plate are oppositely arranged in the clamping body through the locking mechanism; arc-shaped grooves are respectively formed in the top of the upper clamping plate and the bottom of the lower clamping plate; the insulating bush assembly comprises a first insulating bush and a second insulating bush; according to the utility model, the problem of short service life of the transformer caused by poor insulation protection of the outgoing line of the transformer in the prior art can be solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of insulating equipment, and concretely relates to a transformer outgoing line insulation reinforcing clamping structure. BACKGROUND

[0002] In the power system, the transformer outgoing line is an important component connecting the transformer body and the external circuit, and its reliability directly affects the safe operation of the entire transformer system. The existing transformer outgoing line clamping structure usually adopts a simple metal clamp for direct fixation, which is simple in structure but has multiple significant defects.

[0003] Firstly, the metal clamp directly contacts the outgoing line and easily damages the insulation layer, especially under temperature changes and vibration conditions, the insulation layer is easily abraded; secondly, the traditional clamping structure lacks an effective pressure adjustment mechanism, and the clamping force often depends on the experience of the installer, which is prone to over-tightening or over-loosening; thirdly, the conventional clamping structure is insufficient in heat dissipation design, and is prone to overheating under high current working conditions; in addition, the existing structure generally lacks effective sealing measures, and is easily affected by rain, dust, etc. in outdoor environments, accelerating the aging and corrosion of the components. Therefore, these problems seriously affect the operation safety and service life of the transformer. SUMMARY

[0004] Therefore, the utility model provides a transformer outgoing line insulation reinforcing clamping structure, which can solve the problem of poor insulation protection of the transformer outgoing line in the prior art, resulting in low service life of the transformer.

[0005] The utility model is implemented as follows:

[0006] The utility model provides a transformer outgoing line insulation reinforcing clamping structure, which comprises a clamping body 10, a fixed base 11, an upper clamping plate 12, a lower clamping plate 13, an insulation bushing assembly 14 and a locking mechanism 15. The fixed base 11 is fixedly arranged on the transformer shell, and the clamping body 10 is fixedly installed on the upper end of the fixed base 11. The clamping body 10 is hollow inside and has an opening at the top, and an annular sliding groove is arranged on the inner wall of the clamping body. The upper clamping plate 12 and the lower clamping plate 13 are oppositely arranged in the clamping body 10 through the locking mechanism 15. The insulation bushing assembly 14 comprises a first insulation bushing 141 and a second insulation bushing 142, and the first insulation bushing 141 and the second insulation bushing 142 are arranged on the inner side surfaces of the upper clamping plate 12 and the lower clamping plate 13, respectively. A channel for accommodating the transformer outgoing line is formed between the first insulation bushing 141 and the second insulation bushing 142.

[0007] The technical effect of the transformer outgoing line insulation reinforced clamping structure is as follows: through the combination of the clamping body, the fixed base, the upper and lower clamping plates, the insulation bushing assembly and the locking mechanism, a complete transformer outgoing line clamping system is formed, wherein the annular sliding groove on the inner wall of the clamping body cooperates with the upper and lower clamping plates, the stability and reliability of the clamping action are ensured, and the insulation bushing assembly provides good insulation protection and effectively prevents damage to the insulation layer of the outgoing line.

[0008] On the basis of the above technical scheme, the transformer outgoing line insulation reinforced clamping structure can be further improved as follows:

[0009] The locking mechanism 15 comprises a through screw rod 16, a locking nut 17 and a pressure spring 18; the through screw rod 16 penetrates through the upper clamping plate 12 and the lower clamping plate 13, the top end of the through screw rod 16 is fixedly connected with the upper clamping plate 12, and the bottom end of the through screw rod 16 penetrates through the pressure spring 18 and the locking nut 17 in sequence; the two ends of the pressure spring 18 are abutted against the bottom surface of the lower clamping plate 13 and the upper end surface of the locking nut 17 respectively.

[0010] The beneficial effect of the above improved scheme is that the locking mechanism composed of the through screw rod, the locking nut and the pressure spring realizes accurate pressure control between the upper and lower clamping plates, the setting of the pressure spring can compensate for the gap change caused by temperature change or vibration, and the stability of the clamping force is ensured; through the adjustment of the locking nut, the appropriate clamping force can be adjusted according to the outgoing lines of different specifications, and the over-tightening or over-loosening phenomenon is effectively avoided.

[0011] Further, the first insulation bushing 141 and the second insulation bushing 142 are both in the shape of a half cylinder, and a semicircular groove 19 is arranged on the opposite surface of each of the first insulation bushing 141 and the second insulation bushing 142; the first insulation bushing 141 and the second insulation bushing 142 are made of epoxy resin material.

[0012] The beneficial effect of the above improved scheme is that the first insulation bushing and the second insulation bushing are designed in the shape of a half cylinder and a semicircular groove is arranged on the opposite surface, a complete circular channel is formed, the outgoing line can be protected in all directions, the insulation bushing made of epoxy resin material has excellent insulation performance and mechanical strength, can work stably in a high-voltage environment for a long time, and has good temperature resistance and anti-aging performance.

[0013] Further, a plurality of heat dissipation fins 20 are arranged on the outer wall of the clamping body 10, and the plurality of heat dissipation fins 20 are uniformly distributed along the circumference of the clamping body 10; the clamping body 10 is made of aluminum alloy material.

[0014] The beneficial effects of the above improvement scheme are that: the plurality of heat dissipation fins arranged on the outer wall of the clamping body significantly increase the heat dissipation area, improve the heat dissipation efficiency of the structure, and effectively avoid the insulation performance decline caused by temperature rise; the clamping body made of aluminum alloy material has the characteristics of light weight, good heat conductivity, excellent processing performance, etc., which not only ensures the structural strength but also improves the heat dissipation effect.

[0015] Further, the outer circumferential surface of the upper clamping plate and the lower clamping plate is provided with a sliding protrusion matched with the annular sliding groove; and a polytetrafluoroethylene sealing ring is arranged between the sliding protrusion and the annular sliding groove.

[0016] The beneficial effects of the above improvement scheme are that: by arranging the sliding protrusion matched with the annular sliding groove on the outer circumferential surface of the upper and lower clamping plates, the accurate guidance of the clamping plate is realized, and the shaking during clamping is prevented; the design of the polytetrafluoroethylene sealing ring not only has good sealing effect, but also has self-lubricating characteristics, reduces sliding friction, and prolongs service life.

[0017] Further, the top opening of the clamping body is provided with an annular sealing ring groove, and a rubber sealing gasket is embedded in the annular sealing ring groove; and the top surface of the upper clamping plate is in sealing contact with the rubber sealing gasket.

[0018] The beneficial effects of the above improvement scheme are that: the annular sealing ring groove and the rubber sealing gasket are arranged at the top opening of the clamping body, forming a reliable sealing structure, effectively preventing the invasion of external impurities such as dust and moisture; through the sealing contact between the top surface of the upper clamping plate and the rubber sealing gasket, the sealing effect is ensured while also playing a role in vibration reduction.

[0019] Further, the fixed base 11 includes a bottom plate 21 and a support column 22, the support column 22 is fixedly arranged at the four corners of the upper surface of the bottom plate 21; the bottom of the clamping body 10 is provided with a mounting hole corresponding to the support column 22, and a metal bushing is arranged in the mounting hole.

[0020] The beneficial effects of the above improvement scheme are that: the fixed base structure composed of the bottom plate and the support column provides a stable installation foundation, and the support columns arranged at the four corners enhance the stability of the overall structure; the metal bushing arranged in the mounting hole not only improves the installation strength but also prevents the thread from slipping during installation.

[0021] Further, the opposite end surfaces of the first and second insulation bushings 141 and 142 are each provided with a cross-shaped positioning protrusion 23; and the opposite inner surfaces of the upper and lower clamping plates 12 and 13 are each provided with a cross-shaped groove matched with the cross-shaped positioning protrusion 23.

[0022] The beneficial effect of the improved scheme is that the cross-shaped positioning protrusion and the corresponding cross-shaped groove design realize accurate positioning and anti-rotation between the insulating bushing and the clamping plate, ensure the position stability of the insulating bushing during use, and prevent improper clamping due to position deviation.

[0023] Further, the inner wall of the clamping body is provided with an annular reinforcing rib, which is located below the annular sliding groove; the thickness of the annular reinforcing rib is 8-12 mm.

[0024] The beneficial effect of the improved scheme is that the annular reinforcing rib with a specific thickness is arranged on the inner wall of the clamping body to enhance the structural strength of the clamping body and prevent deformation during long-term use; the thickness of 8-12 mm ensures sufficient strength and avoids excessive increase in overall weight.

[0025] Further, the thickness of the upper clamping plate and the lower clamping plate is 15-20 mm; the upper clamping plate and the lower clamping plate are made of stainless steel, and the diameter of the through screw rod is 10-15 mm.

[0026] The beneficial effect of the improved scheme is that the thickness of the upper and lower clamping plates is set to 15-20 mm, and the upper and lower clamping plates are made of stainless steel, which ensures sufficient mechanical strength and good corrosion resistance; the diameter of the through screw rod is designed to be 10-15 mm, which ensures the reliability and durability of the locking mechanism.

[0027] Compared with the prior art, the transformer lead insulation reinforcing clamping structure has the beneficial effect that the innovative clamping structure design realizes all-around protection and reliable fixation of the transformer lead. The semicylindrical insulating bushing made of epoxy resin material provides excellent insulation performance, the design of the pressure spring and the locking nut realizes accurate adjustment of the clamping force, the arrangement of multiple heat dissipation fins significantly improves the heat dissipation effect, and the multiple sealing structure ensures good protection performance. The problems of poor insulation protection of the transformer lead and low service life of the transformer are effectively solved, and the reliability and service life of the transformer lead connection are improved. At the same time, the entire structure is designed in a modular manner, which is convenient to install and maintain, has good practicality and promotional value. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0029] Fig. 1 It is an internal schematic view of a kind of transformer lead wire insulation reinforcing clamping structure;

[0030] Fig. 2 It is an external side schematic view of a kind of transformer lead wire insulation reinforcing clamping structure;

[0031] Fig. 3 It is the position schematic view of cross-shaped positioning protrusion on insulating bushing;

[0032] In the drawing, the component list represented by each mark is as follows:

[0033] 10, clamping body;11, fixed base;12, upper clamping plate;13, lower clamping plate;14, insulating bushing assembly;141, first insulating bushing;142, second insulating bushing;15, locking mechanism;16, through screw;17, locking nut;18, pressure spring;19, semicircular groove;20, heat dissipation fin;21, bottom plate;22, support column;23, cross-shaped positioning protrusion. DETAILED DESCRIPTION

[0034] To make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application.

[0035] As Figs. 1-3 shown, it is an embodiment of the transformer lead wire insulation reinforcing clamping structure provided by the present application, in the embodiment, including clamping body, fixed base, upper clamping plate, lower clamping plate, insulating bushing assembly and locking mechanism;Fixed base is fixedly arranged on the transformer shell, and the clamping body is fixedly installed on the upper end of the fixed base;The clamping body is hollow inside and has an opening at the top, and an annular sliding groove is arranged on the inner wall of the clamping body;The upper clamping plate and the lower clamping plate are oppositely arranged in the clamping body by the locking mechanism;The top of the upper clamping plate and the bottom of the lower clamping plate are respectively provided with arc grooves;The insulating bushing assembly includes first insulating bushing and second insulating bushing, and the first insulating bushing and the second insulating bushing are respectively arranged on the inner side of the upper clamping plate and the lower clamping plate;A passage for accommodating the transformer lead wire is formed between the first insulating bushing and the second insulating bushing.

[0036] In the above technical scheme, the locking mechanism includes through screw, locking nut and pressure spring;The through screw passes through the upper clamping plate and the lower clamping plate, the top end of the through screw is fixedly connected with the upper clamping plate, and the bottom end of the through screw passes through the pressure spring and the locking nut in sequence;The two ends of the pressure spring are respectively abutted on the bottom surface of the lower clamping plate and the upper end surface of the locking nut.

[0037] Further, in the above technical solution, the first insulating bush and the second insulating bush are both in a semi-cylindrical shape, and each of the opposite surfaces of the first insulating bush and the second insulating bush is provided with a semicircular groove; the first insulating bush and the second insulating bush are made of epoxy resin material.

[0038] Further, in the above technical solution, the outer wall of the clamping body is provided with a plurality of heat dissipation fins, and the plurality of heat dissipation fins are uniformly distributed along the circumference of the clamping body; the clamping body is made of aluminum alloy material.

[0039] Further, in the above technical solution, the outer circumferential surface of the upper clamping plate and the lower clamping plate is provided with a sliding protrusion matched with the annular sliding groove; a polytetrafluoroethylene sealing ring is arranged between the sliding protrusion and the annular sliding groove.

[0040] Further, in the above technical solution, the top opening of the clamping body is provided with an annular sealing ring groove, and a rubber sealing gasket is embedded in the annular sealing ring groove; the top surface of the upper clamping plate is in sealing contact with the rubber sealing gasket.

[0041] Further, in the above technical solution, the fixing base comprises a bottom plate and a support column, and the support column is fixedly arranged at the four corners of the upper surface of the bottom plate; the bottom of the clamping body is provided with a mounting hole corresponding to the support column, and a metal bushing is arranged in the mounting hole.

[0042] Further, in the above technical solution, the opposite end surfaces of the first insulating bush and the second insulating bush are each provided with a cross-shaped positioning protrusion; the opposite inner surfaces of the upper clamping plate and the lower clamping plate are provided with a cross-shaped groove matched with the cross-shaped positioning protrusion.

[0043] Further, in the above technical solution, the inner wall of the clamping body is provided with an annular reinforcing rib, and the annular reinforcing rib is located below the annular sliding groove; the thickness of the annular reinforcing rib is 8-12 mm.

[0044] Further, in the above technical solution, the thickness of the upper clamping plate and the lower clamping plate is 15-20 mm; the upper clamping plate and the lower clamping plate are made of stainless steel material, and the diameter of the through screw rod is 10-15 mm.

[0045] The following is a specific embodiment of the above technical solution:

[0046] In the transformer lead insulation strengthening clamping structure of the embodiment, the clamping body is made of AL6061-T6 aluminum alloy material, the overall height is 180 mm, the outer diameter is 120 mm, and the wall thickness is 10 mm.

[0047] The clamping body outer wall is evenly distributed with 12 heat dissipation fins, each heat dissipation fin has a height of 25 mm and a thickness of 3 mm, and is integrally formed with the body through a precision casting process. The annular sliding groove on the inner wall of the clamping body has a width of 5 mm and a depth of 3 mm, and the surface is precisely machined to a roughness of Ra0.8.

[0048] The upper and lower clamping plates are made of 304 stainless steel material, each having a thickness of 18 mm, an outer diameter of 100 mm, and a through hole with a diameter of 12 mm in the center. The arc-shaped groove has a curvature radius of 30 mm and a groove depth of 10 mm, and the surface is polished.

[0049] The first and second insulating bushings are made of epoxy resin material, each having an outer diameter of 40 mm and a height of 50 mm, and a semicircular groove with a diameter of 25 mm. The inner surface is specially treated and has the characteristics of high temperature resistance, corrosion resistance, and aging resistance. The cross-shaped positioning protrusion has an arm length of 10 mm and a height of 2 mm, and strictly cooperates with the groove on the clamping plate.

[0050] The through screw in the locking mechanism is made of 42CrMo alloy steel, has a diameter of 12 mm, a thread specification of M12x1.5, and a surface galvanized treatment.

[0051] The pressure spring is made of 65Mn spring steel, has a free length of 40 mm, an outer diameter of 20 mm, and a wire diameter of 2 mm. The base plate of the fixed base is made of Q235 steel plate, has a thickness of 15 mm, a side length of 200 mm, and four support columns each having a height of 60 mm and a diameter of 25 mm. The annular sealing ring groove has a depth of 3 mm and a width of 4 mm, and the embedded rubber sealing gasket is made of nitrile rubber material with a hardness of 60 degrees.

[0052] The annular reinforcing rib has a thickness of 10 mm and a height of 15 mm. The polytetrafluoroethylene sealing ring has a cross-sectional diameter of 2 mm. The total weight of the entire structure is controlled to be less than 4.5 kg, all metal surfaces are subjected to corrosion protection treatment, and can work stably in a temperature range of -40°C to 120°C, suitable for fixing and protecting various types of transformer lead wires.

[0053] Specifically, the principle of the utility model is: through the analysis transformer outgoing line in the use process is faced with the main problem, adopts multilevel technical scheme to realize comprehensive protection. First, in the insulation protection aspect, adopt the semicircular column shape insulation bushing of epoxy resin material, utilize its excellent insulation performance and mechanical strength, form the complete protection channel; in the clamping force control aspect, through the cooperation of pressure spring and locking nut, utilize the elastic deformation characteristics of spring to realize the force buffer and compensation effect; in the heat dissipation design aspect, utilize the high thermal conductivity of aluminum alloy material and the expansion surface area principle of heat dissipation fin, significantly improve the heat dissipation effect; in the sealing design aspect, adopt multiple sealing structure, through the combination application of rubber sealing ring and polytetrafluoroethylene sealing ring, form reliable protective barrier. Meanwhile, the overall structure adopts the modular design concept, and each functional component mutually cooperates, and is complementary, thereby realizes the all -round protection to transformer outgoing line.

Claims

1. A transformer lead insulation reinforcement clamping structure, characterized by, The utility model provides a transformer terminal clamp, including clamping body, fixed base, upper clamping plate, lower clamping plate, insulating bushing assembly and locking mechanism, the fixed base is fixedly arranged on the transformer shell, the clamping body is fixedly installed on the fixed base upper end, the clamping body inside hollow and top has the opening, is provided with annular slide groove on the clamping body inner wall, the upper clamping plate with lower clamping plate is oppositely arranged in the clamping body through the locking mechanism, the upper clamping plate top with lower clamping plate bottom is equipped with arc groove respectively, the insulating bushing assembly includes first insulating bushing and second insulating bushing, first insulating bushing with second insulating bushing is arranged on the opposite inner side of upper clamping plate and lower clamping plate respectively, and the channel for accommodating transformer lead-out wire is formed between first insulating bushing and second insulating bushing.

2. The transformer lead insulation reinforcing clamp structure of claim 1, wherein The locking mechanism includes through screw, locking nut and pressure spring, the through screw passes through the upper clamping plate and the lower clamping plate, the top end of the through screw is fixedly connected with the upper clamping plate, and the bottom end of the through screw sequentially passes through the pressure spring and the locking nut, and the two ends of the pressure spring are abutted on the bottom surface of the lower clamping plate and the upper end surface of the locking nut respectively.

3. The transformer lead insulation strengthening clamping structure according to claim 2, characterized in that, The first insulating bushing and the second insulating bushing are both in the shape of a half cylinder, and a semicircular groove is arranged on the opposite surface of the first insulating bushing and the second insulating bushing; the first insulating bushing and the second insulating bushing are made of epoxy resin material.

4. The transformer lead insulation strengthening clamping structure according to claim 3, characterized in that, A plurality of heat dissipation fins are arranged on the outer wall of the clamping body, and the plurality of heat dissipation fins are uniformly distributed along the circumference of the clamping body; the clamping body is made of aluminum alloy material.

5. The transformer lead insulation reinforcement clamp structure of claim 4, wherein, A sliding protrusion matched with the annular slide groove is arranged on the outer circumferential surface of the upper clamping plate and the lower clamping plate; a polytetrafluoroethylene sealing ring is arranged between the sliding protrusion and the annular slide groove.

6. The transformer lead insulation reinforcement clamp structure of claim 5, wherein An annular sealing ring groove is arranged at the top opening of the clamping body, and a rubber sealing gasket is embedded in the annular sealing ring groove; the top surface of the upper clamping plate is in sealing contact with the rubber sealing gasket.

7. The transformer lead insulation reinforcement clamp structure of claim 6, wherein The fixed base includes a bottom plate and a support column, and the support column is fixedly arranged at each corner of the upper surface of the bottom plate; the bottom of the clamping body is provided with a mounting hole corresponding to the support column, and a metal bushing is arranged in the mounting hole.

8. The transformer lead insulation reinforcement clamp structure of claim 7, wherein Cross-shaped positioning protrusions are arranged on the opposite end surfaces of the first insulating bushing and the second insulating bushing; cross-shaped grooves matched with the cross-shaped positioning protrusions are arranged on the opposite inner surfaces of the upper clamping plate and the lower clamping plate.

9. The transformer lead insulation reinforcement clamp structure of claim 8, wherein, An annular reinforcing rib is arranged on the inner wall of the clamping body, and the annular reinforcing rib is located below the annular slide groove; the thickness of the annular reinforcing rib is 8-12 mm.

10. The transformer lead insulation reinforcement clamp structure of claim 9, wherein, The thickness of the upper clamping plate and the lower clamping plate is 15-20 mm; the upper clamping plate and the lower clamping plate are made of stainless steel material, and the diameter of the through screw is 10-15 mm.

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