A core clamping frame for resin-insulated dry-type transformer

Abstract

The invention discloses an iron core clamping frame for a resin-insulated dry-type transformer, comprising a first clamping plate, the inner walls of four first screw holes are all interspersed with first screw rods, the outer walls of one end of the four first screw rods are all sleeved with fixing rings, the inner walls of the four fixing rings are respectively threadedly connected with the outer walls of the four first screw rods, the four corners on one side of the first clamping plate are all interspersed with support rods, the middle positions of the outer walls of the four support rods are all sleeved with fixing sheets, and the outer walls of one end of the four support rods are all sleeved with first springs. In the invention, after the magnetic flux core is clamped by the clamping ring and the first bolt, the fixing rings at the upper ends of the four first screw rods are screwed to shorten the distance between the first clamping plate and the second clamping plate, and the first clamping plate slides on the support rod to compress the deformation of the first spring to shorten the distance, so that the magnetic flux core is clamped, and the fixing ring can be loosened later to loosen the clamping structure for maintenance, thereby improving the convenience of using the device.

Description

Technical Field

[0001] The invention relates to the technical field of iron core clamping frames, in particular to an iron core clamping frame for a resin-insulated dry-type transformer. Background Art

[0002] A traditional transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. Its main components are the primary coil, the secondary coil and the iron core (magnetic core). The main functions include: voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization (magnetic saturation transformer), etc. Transformers are basic equipment for power transmission and distribution, and are widely used in industries, agriculture, transportation, urban communities and other fields. There are about 17 million transformers in operation in my country, with a total capacity of about 11 billion kilovolt-amperes. Transformer losses account for about 40% of power transmission and distribution losses, and have great energy-saving potential. In order to accelerate the promotion and application of high-efficiency and energy-saving transformers and improve the efficiency of energy resource utilization, when the transformer is in use, the clamping frame at the upper end of the transformer is mainly used to clamp and fix the iron core with the coil in it, so that the transformer can be more stable when working;

[0003] In view of this, Chinese Patent No. CN102360774A provides a core clamping frame for a resin-insulated dry-type transformer. The invention has a simple structure, is easy to use, has a good clamping effect, and avoids loosening of the core. At the same time, the use of a rubber insulating sleeve and an insulating sleeve can not only reduce noise during subsequent use, but also make the surface of the product not easily damaged, thereby enhancing the stability and safety performance of the product. The processing operation is simple, shortens the processing time, and improves production efficiency and safety performance. However, when in use, an ordinary clamping frame does not have the function of adjusting the tightness of the magnetic flux core when clamping it, so that the staff cannot loosen it for inspection during later inspection and maintenance, and cannot check the use of the core during maintenance, thereby reducing the convenience of using the device. Summary of the invention

[0004] The object of the present invention is to provide a core clamping frame for a resin-insulated dry-type transformer to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a core clamping frame for a resin-insulated dry-type transformer, comprising a first clamping plate, two first screw holes are provided at the edges of both ends of one side of the first clamping plate, the inner walls of the four first screw holes are interspersed with first screw rods, the outer walls of one end of the four first screw rods are sleeved with fixing rings, the inner walls of the four fixing rings are respectively threadedly connected with the outer walls of the four first screw rods, four corners on one side of the first clamping plate are interspersed with support rods, the top ends of the four support rods are fixedly provided with limiting plates, the middle positions of the outer walls of the four support rods are sleeved with fixing plates, the outer walls of one end of the four support rods are sleeved with first springs, and one end of the first spring is fixedly connected to one side of the four fixing plates, and the other ends of the four first springs are respectively in contact with the four corners on one side of the first clamping plate, the bottoms of the four first screw rods are fixedly provided with second clamping plates, and the top ends of the second clamping plates are respectively fixedly connected to the bottoms of the four first screw rods, and both ends of one side of the first clamping plate and both ends of one side of the second clamping plate are provided with clamping holes.

[0006] Preferably, connecting holes are provided at the four corners of the top end of the first clamping plate and the four corners of the top end of the second clamping plate, and the outer walls of one end of the four support rods are respectively inserted and connected with the inner walls of four of the connecting holes, and the outer walls of the other ends of the four support rods are respectively fixedly connected with the inner walls of the other four connecting holes.

[0007] Preferably, the inner wall of the first clamping plate and the inner wall of the second clamping plate are both provided with buffer grooves, and a plurality of clamping rings are fixedly provided at equal distances on the top of the second clamping plate.

[0008] Preferably, insulating pads are fixedly provided on both sides of the inner wall of each clamping ring, first bolts are inserted at both ends of one side of each clamping ring, and each first bolt is respectively threadedly connected to the inner wall of one side of each clamping ring.

[0009] Preferably, connecting strips are provided on both sides of the first clamping plate and both sides of the second clamping plate, and buckles are fixedly provided on one side of the four connecting strips, and the outer wall of each buckle is respectively connected with the inner wall of each clamping hole.

[0010] Preferably, connecting shafts are fixedly provided on both sides of the bottom of two of the connecting strips, and the outer walls of the four connecting shafts are respectively interlaced and connected with the inner walls of the other two connecting strips, and limiting blocks are fixedly provided on the edges of one side of the four connecting strips.

[0011] Preferably, a second bolt is inserted into one side of each of the two limit blocks, and outer walls of the two second bolts respectively pass through the inner walls of two of the limit blocks and are threadedly connected to the inner walls of the other two limit blocks.

[0012] Preferably, fixed shafts are fixed on both sides of the two ends of the bottom of the second clamping plate, wherein one side of the two fixed shafts is fixed with a docking shaft, and the outer walls of one end of the two docking shafts are respectively inserted and connected with the inner walls of the other two fixed shafts, and the outer walls of the two docking shafts are respectively sleeved with second springs, and the two ends of the two second springs are respectively fixedly connected to one side of the four fixed shafts.

[0013] Preferably, the inner wall of the clamping ring is clamped with a magnetic flux core, and the outer wall of each first bolt is respectively inserted and connected with the inner wall of each magnetic flux core, and positioning plates are fixed on both sides of the second clamping plate, and multiple second screw holes are evenly spaced on one side of the two positioning plates.

[0014] Preferably, second screws are fixed on both sides of the top of the first clamping plate, rubber pads are sleeved on the bottoms of the outer walls of the two second screws, connecting caps are sleeved on the upper ends of the outer walls of the two second screws, and the inner walls of the two connecting caps are respectively threadedly connected to the outer walls of the two second screws, and a third screw hole is opened on one side of the two connecting caps.

[0015] Technical effects and advantages of the present invention:

[0016] (1) The present invention provides a clamping frame structure on the device that is convenient for adjusting the tightness, and the structure is mainly composed of a first clamping plate, a first screw hole, a first screw rod, a fixing ring, a support rod, a limit plate, a fixing plate, a first spring, a second clamping plate, a clamping ring and a first bolt. After the magnetic flux core is clamped by the clamping ring and the first bolt, the fixing ring at the upper end of the four first screw rods is turned to shorten the distance between the first clamping plate and the second clamping plate, and the first clamping plate slides on the support rod to compress the first spring to deform and shorten the distance, so that the magnetic flux core is clamped. The fixing ring can be loosened later to loosen the clamping structure for maintenance, thereby improving the convenience of using the device;

[0017] (2) The present invention provides an auxiliary reinforcement connection structure on the device, and the structure is mainly composed of a clamping hole, a buckle, a connecting strip, a connecting shaft, a limit block and a second bolt. When in use, the buckle at the upper end of the connecting strip is engaged with the clamping hole at the upper end of the first clamping plate and the second clamping plate to position and fix the device. The second bolt is turned to shrink the distance between the connecting strips at both ends, so that the connecting shaft can be extended and retracted in the connecting strip. The clamping property of the clamping frame can be improved, making it more stable and not easy to loosen, thereby improving the stability of the device.

[0018] (3) The present invention provides a buffer fixing structure on the device, and the structure is mainly composed of a positioning plate, a second screw hole, a fixed shaft, a docking shaft and a second spring. When in use, the device is fixed by the positioning plate and the second screw hole at its upper end. When installed at a high altitude, it needs to face the impact of wind. When impacted, the docking shaft at the upper end of the fixed shaft expands and contracts on its inner wall, squeezing the second spring to produce deformation, thereby generating a buffer force, reducing the damage to the device caused by the impact of airflow, thereby improving the protectiveness of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the structure in which the support rod and the first screw rod are adjustable according to the present invention.

[0021] Figure 3 It is a structural schematic diagram of the positioning of the clamp ring of the present invention.

[0022] Figure 4 It is a schematic diagram of the structure of the auxiliary reinforcement of the connecting strip of the present invention.

[0023] Figure 5 It is a schematic structural diagram of the buffer protection of the fixed shaft and the docking shaft of the present invention.

[0024] In the figure: 1. first clamping plate; 2. first screw hole; 3. first screw rod; 4. fixing ring; 5. support rod; 6. limiting plate; 7. fixing plate; 8. first spring; 9. clamping hole; 10. second clamping plate; 11. connecting hole; 12. buffer groove; 13. clamping ring; 14. insulating pad; 15. first bolt; 16. connecting strip; 17. buckle; 18. connecting shaft; 19. limiting block; 20. second bolt; 21. fixing shaft; 22. docking shaft; 23. second spring; 24. flux core; 25. positioning plate; 26. second screw hole; 27. rubber pad; 28. second screw rod; 29. ​​connecting cap; 30. third screw hole. DETAILED DESCRIPTION

[0025] 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.

[0026] The present invention provides Figure 1-5The iron core clamping frame for a resin-insulated dry-type transformer shown in the figure comprises a first clamping plate 1, the inner wall of the clamping ring 13 is clamped with a magnetic flux core 24, and the outer wall of each first bolt 15 is respectively connected with the inner wall of each magnetic flux core 24, and the second clamping plate 10 is fixed with a positioning piece 25 on both sides, and a plurality of second screw holes 26 are evenly spaced on one side of the two positioning pieces 25, and the second screw rods 28 are fixed on both sides of the top of the first clamping plate 1, and the bottoms of the outer walls of the two second screw rods 28 are sleeved with rubber pads 27, and the upper ends of the outer walls of the two second screw rods 28 are sleeved with connecting caps 29, and the inner walls of the two connecting caps 29 are respectively threadedly connected with the outer walls of the two second screw rods 28, and the two connecting caps 29 are respectively provided with a third screw hole 30 on one side;

[0027] like Figure 2 As shown, two first screw holes 2 are provided at the edges of both ends of one side of the first clamping plate 1, the inner walls of the four first screw holes 2 are interspersed with first screw rods 3, the outer walls of one end of the four first screw rods 3 are sleeved with fixing rings 4, the inner walls of the four fixing rings 4 are respectively threadedly connected with the outer walls of the four first screw rods 3, the four corners on one side of the first clamping plate 1 are interspersed with support rods 5, the top ends of the four support rods 5 are fixed with limiting plates 6, the middle positions of the outer walls of the four support rods 5 are sleeved with fixing plates 7, the outer walls of one end of the four support rods 5 are sleeved with first springs 8, and one end of the first spring 8 is respectively fixedly connected to one side of the four fixing plates 7, the other ends of the four first springs 8 are respectively in contact with the four corners on one side of the first clamping plate 1, the bottoms of the four first screw rods 3 are fixedly provided with second clamping plates 10, and the top ends of the second clamping plates 10 are respectively fixedly connected to the bottoms of the four first screw rods 3, and the two ends of one side of the first clamping plate 1 and the two ends of one side of the second clamping plate 10 are provided with clamping holes 9;

[0028] like Figure 3 As shown, connecting holes 11 are provided at the four corners of the top of the first clamping plate 1 and the four corners of the top of the second clamping plate 10, and the outer walls of one end of the four support rods 5 are respectively inserted and connected with the inner walls of four of the connecting holes 11, and the outer walls of the other ends of the four support rods 5 are respectively fixedly connected with the inner walls of the other four connecting holes 11, and the inner walls of the first clamping plate 1 and the inner walls of the second clamping plate 10 are respectively provided with buffer grooves 12, and the top of the second clamping plate 10 is fixedly provided with a plurality of clamping rings 13 at equal distances, and both sides of the inner wall of each clamping ring 13 are fixedly provided with insulating pads 14, and both ends of one side of each clamping ring 13 are inserted with first bolts 15, and each first bolt 15 is respectively threadedly connected with the inner wall of one side of each clamping ring 13;

[0029] like Figure 4As shown, both sides of the first clamping plate 1 and both sides of the second clamping plate 10 are clamped with connecting strips 16, one side of the four connecting strips 16 is fixed with a buckle 17, and the outer wall of each buckle 17 is respectively clamped and connected with the inner wall of each clamping hole 9, wherein both sides of the bottom of the two connecting strips 16 are fixed with connecting shafts 18, and the outer walls of the four connecting shafts 18 are respectively inserted and connected with the inner walls of the other two connecting strips 16, and the edge of one side of the four connecting strips 16 is fixed with a limit block 19, wherein one side of the two limit blocks 19 is inserted with a second bolt 20, and the outer walls of the two second bolts 20 pass through the inner walls of two of the limit blocks 19 and are threadedly connected with the inner walls of the other two limit blocks 19;

[0030] like Figure 5 As shown, fixed shafts 21 are fixed on both sides of the two ends of the bottom of the second clamping plate 10, wherein one side of the two fixed shafts 21 is fixed with a docking shaft 22, and the outer walls of one end of the two docking shafts 22 are respectively inserted and connected with the inner walls of the other two fixed shafts 21, and the outer walls of the two docking shafts 22 are respectively sleeved with second springs 23, and the two ends of the two second springs 23 are respectively fixedly connected with one side of the four fixed shafts 21.

[0031] Working principle of the present invention: When using the core clamping frame for resin-insulated dry-type transformers in the present design, firstly, the first clamping plate 1 and the second clamping plate 10 at the upper end of the device need to be connected through the support rod 5 and the first screw 3, so that the magnetic flux core 24 with the coil is clamped in the middle of the two clamping plates, which is convenient for the normal use of the transformer. In the present design, the first clamping plate 1, the first screw hole 2, the first screw 3, the fixing ring 4, the support rod 5, the limit plate 6, the fixing plate 7, the first spring 8, the second clamping plate 9, the second clamping plate 10, the first screw hole 2, the first screw 3, the fixing ring 4, the support rod 5, the limit plate 6, the fixing plate 7, the first spring 8, the second clamping plate 9 ... The clamping frame structure composed of the plate 10, the clamping ring 13 and the first bolt 15 is easy to adjust the tightness. When in use, after the magnetic flux core 24 is clamped by the clamping ring 13 and the first bolt 15, the fixing ring 4 at the upper end of the four first screw rods 3 is screwed to shorten the distance between the first clamping plate 1 and the second clamping plate 10, and the first clamping plate 1 slides on the support rod 5 to compress the first spring 8 to deform to shorten the distance, so that the magnetic flux core 24 is clamped. The fixing ring 4 can be loosened later to loosen the clamping structure for maintenance, thereby improving the convenience of using the device. The device is provided with an auxiliary reinforcement connection structure composed of a clamping hole 9, a buckle 17, a connecting strip 16, a connecting shaft 18, a limit block 19 and a second bolt 20. When in use, the buckle 17 at the upper end of the connecting strip 16 is clamped in the clamping hole 9 at the upper end of the first clamping plate 1 and the second clamping plate 10 to position and fix it. The second bolt 20 is screwed to shrink the distance between the connecting strips 16 at both ends, so that the connecting shaft 18 can be retracted in the connecting strip 16, which can improve the clamping performance of the clamping frame, make it more stable, and not easy to loosen, thereby improving the installation The device is provided with a buffer fixing structure consisting of a positioning piece 25, a second screw hole 26, a fixed shaft 21, a docking shaft 22 and a second spring 23. When in use, the device is fixed by the positioning piece 25 and the second screw hole 26 at its upper end. When installed at a high altitude, it needs to face the impact of wind. When impacted, the docking shaft 22 at the upper end of the fixed shaft 21 expands and contracts on its inner wall, squeezing the second spring 23 to produce deformation, thereby generating a buffer force, reducing the damage to the device caused by the impact of airflow, thereby improving the protection of the device.

[0032] In the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", and "fix" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] The standard parts used in the present invention can all be purchased from the market, and the special-shaped parts can all be customized according to the description and the drawings.

[0034] 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 core clamping frame for a resin-insulated dry-type transformer, comprising a first clamping plate (1), two first screw holes (2) are provided at the edges of both ends of one side of the first clamping plate (1), first screw rods (3) are inserted into the inner walls of the four first screw holes (2), and fixing rings (4) are sleeved on the outer walls of one end of the four first screw rods (3); It is characterized in that The inner walls of the four fixing rings (4) are respectively threadedly connected to the outer walls of the four first screw rods (3); support rods (5) are inserted at the four corners of one side of the first clamping plate (1); the top ends of the four support rods (5) are fixedly provided with limit plates (6); the middle positions of the outer walls of the four support rods (5) are sleeved with fixing plates (7); the outer walls of one end of the four support rods (5) are sleeved with first springs (8), and one end of the first spring (8) is respectively fixedly connected to one side of the four fixing plates (7); the other ends of the four first springs (8) are respectively in contact with the four corners of one side of the first clamping plate (1); the bottoms of the four first screw rods (3) are fixedly provided with second clamping plates (10), and the top ends of the second clamping plates (10) are respectively fixedly connected to the bottoms of the four first screw rods (3); both ends of one side of the first clamping plate (1) and both ends of one side of the second clamping plate (10) are provided with clamping holes (9); The inner wall of the first clamping plate (1) and the inner wall of the second clamping plate (10) are both provided with a buffer groove (12); a plurality of clamping rings (13) are fixedly provided at equal distances on the top of the second clamping plate (10); insulating pads (14) are fixedly provided on both sides of the inner wall of each clamping ring (13); first bolts (15) are inserted at both ends of one side of each clamping ring (13); and each first bolt (15) is respectively threadedly connected to the inner wall of one side of each clamping ring (13). Both sides of the first clamping plate (1) and both sides of the second clamping plate (10) are provided with connecting strips (16) in a clamping engagement, and one side of each of the four connecting strips (16) is fixedly provided with a snap-fit ​​buckle (17), and the outer wall of each snap-fit ​​buckle (17) is respectively clamped and connected with the inner wall of each clamping hole (9). The inner wall of the clamping ring (13) is clamped with a magnetic flux core (24), and the outer wall of each first bolt (15) is respectively connected to the inner wall of each magnetic flux core (24). Positioning plates (25) are fixedly provided on both sides of the second clamping plate (10), and a plurality of second screw holes (26) are evenly spaced on one side of the two positioning plates (25).

2. The core clamping frame for a resin-insulated dry-type transformer according to claim 1, characterized in that: The four corners at the top of the first clamping plate (1) and the four corners at the top of the second clamping plate (10) are provided with connection holes (11), and the outer walls of one end of the four support rods (5) are respectively connected to the inner walls of four of the connection holes (11), and the outer walls of the other ends of the four support rods (5) are respectively fixedly connected to the inner walls of the other four connection holes (11).

3. The core clamping frame for a resin-insulated dry-type transformer according to claim 1, characterized in that: Two of the connecting strips (16) are fixedly provided with connecting shafts (18) on both sides of the bottom, and the outer walls of the four connecting shafts (18) are respectively connected to the inner walls of the other two connecting strips (16) through insertion, and a limit block (19) is fixedly provided at the edge of one side of the four connecting strips (16).

4. The core clamping frame for a resin-insulated dry-type transformer according to claim 3, characterized in that: A second bolt (20) is inserted into one side of two of the limit blocks (19), and the outer walls of the two second bolts (20) respectively pass through the inner walls of two of the limit blocks (19) and are threadedly connected to the inner walls of the other two limit blocks (19).

5. The core clamping frame for a resin-insulated dry-type transformer according to claim 1, characterized in that: Fixed shafts (21) are fixedly provided on both sides of both ends of the bottom of the second clamping plate (10), wherein one side of the two fixed shafts (21) is fixedly provided with docking shafts (22), and the outer walls of one end of the two docking shafts (22) are respectively connected with the inner walls of the other two fixed shafts (21) through and through, and the outer walls of the two docking shafts (22) are sleeved with second springs (23), and the two ends of the two second springs (23) are respectively fixedly connected with one side of the four fixed shafts (21).

6. The core clamping frame for a resin-insulated dry-type transformer according to claim 1, characterized in that: Second screw rods (28) are fixedly provided on both sides of the top end of the first clamping plate (1), the bottoms of the outer walls of the two second screw rods (28) are sleeved with rubber pads (27), the upper ends of the outer walls of the two second screw rods (28) are sleeved with connecting caps (29), and the inner walls of the two connecting caps (29) are respectively threadedly connected to the outer walls of the two second screw rods (28), and one side of the two connecting caps (29) is provided with a third screw hole (30).

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