Transformer iron core clamping device

Abstract

The utility model belongs to the technical field of transformers, and particularly relates to a transformer iron core clamping device which comprises clamping plates, every two clamping plates form a group to be clamped on the upper side and the lower side of an iron core, anti-deformation assemblies are oppositely installed on the left side and the right side of each clamping plate, and each anti-deformation assembly comprises a first supporting seat, a second supporting seat and a connecting seat which are installed on the corresponding clamping plate. The first supporting base, the second supporting base and the connecting base are rotationally connected with the first rotating arm, the pressing rod and the rotating base through pin shafts correspondingly, the rotating base is connected with one end of the supporting screw rod, the supporting screw rod is slidably sleeved with the connecting block and is in threaded connection with the puller nut, and the connecting block is rotationally connected with one end of the first rotating arm and one end of the second rotating arm through pin shafts. The other end of the second rotating arm is rotationally connected with one end of a pressing rod through a pin shaft. The middle of the clamping plate can be pressed through the connecting rod mechanism by rotating the puller nut in the anti-deformation assembly, the situation that the middle of the clamping plate deforms due to the fact that the middle of the clamping plate bears outward supporting force from the iron core is avoided, the pressing rod has the characteristic of tail end reinforcement, and the clamping plate can be stably pressed.

Description

Technical Field

[0001] This utility model belongs to the field of transformer technology, specifically relating to a transformer core clamping device. Background Technology

[0002] The transformer core is composed of silicon steel sheets. To reduce heat loss within the core, it is made of stacked silicon steel sheets with a thickness of 0.23–0.5 mm. The silicon steel sheets used in transformers have a relatively high silicon content. Both sides of the silicon steel sheets are coated with insulating varnish to ensure insulation between the stacked sheets.

[0003] Most existing iron core clamping mechanisms include two channel steels respectively set on opposite sides of the iron core and a bolt and nut structure for locking the two channel steels. In actual installation, the bolt and nut structure is distributed on the edge of the iron core to provide locking tension to the ends of the two channel steels. In this state, the middle part of the channel steel will be subjected to outward supporting force from the iron core, while the ends of the channel steel will be subjected to inward pulling force from the bolt and nut structure. Under the shearing action of the supporting force and the pulling force, the channel steel is very easy to bend and break, thus affecting the clamping effect of the iron core. Utility Model Content

[0004] To address the above problems, the purpose of this utility model is to provide a transformer core clamping device that solves the problem that when bolts and nuts provide locking tension to the end of the channel steel, the channel steel is prone to bending and breakage under the shearing action of the supporting force and tension.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a transformer core clamping device, comprising clamping plates, wherein the clamping plates are clamped in pairs on the upper and lower sides of the core, and connecting bolts are connected between the clamping plates on the upper and lower sides of the core, and tensioning bolts are connected between the clamping plates on the front and rear sides of the core. Anti-deformation components are installed opposite to each other on the left and right sides of the clamping plates. The anti-deformation components include a support seat one, a support seat two, and a connecting seat installed on the clamping plates. The support seat one, the support seat two, and the connecting seat are rotatably connected to a rotating arm one, a pressure rod, and a rotating seat respectively via pins. The rotating seat is connected to one end of a support screw. A connecting block is slidably fitted on the support screw and threadedly connected to a tightening nut. The connecting block is rotatably connected to one end of the rotating arm one and the rotating arm two via pins. The other end of the rotating arm two is rotatably connected to one end of the pressure rod via a pin.

[0006] The beneficial effects of this utility model are as follows: rotating the top tightening nut in the anti-deformation component can press the middle part of the clamping plate through the linkage mechanism, avoiding deformation of the middle part of the clamping plate due to the outward supporting force from the iron core, and the pressure rod has the feature of end force amplification, which can firmly press the clamping plate.

[0007] To ensure the anti-deformation components effectively press against the clamping plates;

[0008] As a further improvement to the above technical solution: the support base one, support base two, and connecting base are all located directly in front of and directly behind the iron core.

[0009] The beneficial effects of this improvement are as follows: when the pressure bar presses the clamping plate, the counter-thrust force on the support seat 1, support seat 2, and connecting seat acts on the clamping plates on both sides of the iron core, and the iron core provides support for the clamping plate at that point, preventing the clamping plate from moving towards the iron core and deforming.

[0010] In order to achieve an effective end-efficiency boosting effect;

[0011] As a further improvement to the above technical solution: the included angle between the first rotating arm and the second rotating arm is not less than 120 degrees.

[0012] The beneficial effects of this improvement are: when the included angle of the toggle mechanism composed of the rotating arm and the connecting block is greater than 120 degrees, the toggle mechanism is a force-increasing mechanism, which can effectively increase the pressure applied to the end of the pressure bar.

[0013] In order to effectively improve the structural stability of the compression member;

[0014] As a further improvement to the above technical solution: the pressure bar is composed of a straight bar segment and an arc-shaped bar segment, and the second support base connects the connection between the straight bar segment and the arc-shaped bar segment through a pin.

[0015] The beneficial effects of this improvement are: the curved rod segment can reduce the space occupied, and can be subjected to force more evenly during the pressing process, thus reducing its own deformation.

[0016] For convenient support and pushing of the connecting block;

[0017] As a further improvement to the above technical solution: the end face of the connecting block facing the rotating seat is abutted against the end face of the tightening nut.

[0018] The beneficial effect of this improvement is that when the tightening nut moves on the support screw, it can push the connecting block to move away from the rotating seat, thereby driving the pressure rod to rotate.

[0019] To ensure the stability of the anti-deformation component support;

[0020] As a further improvement to the above technical solution: there are two of each of the rotating arm one, the pressure rod and the rotating arm two, and they are arranged opposite each other on both sides of the connecting block.

[0021] The beneficial effects of this improvement are: the rotating arm one, the pressure rod and the rotating arm two are set opposite to each other, ensuring that the anti-deformation component is subjected to uniform force during the clamping process.

[0022] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the anti-deformation component in this utility model;

[0025] Figure 3 This is a top view of the anti-deformation component in this utility model;

[0026] In the diagram: 1. Iron core; 2. Clamping plate; 3. Connecting bolt; 4. Tensioning bolt; 5. Anti-deformation component; 6. Support seat one; 7. Support seat two; 8. Connecting seat; 9. Rotating arm one; 10. Connecting block; 11. Pressure rod; 111. Straight rod section; 112. Arc-shaped rod section; 12. Support screw; 13. Tightening nut; 14. Rotating seat; 15. Rotating arm two. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0028] Example 1:

[0029] like Figure 1As shown in Figure 3: A transformer core clamping device includes clamping plates 2, which are clamped in pairs on the upper and lower sides of a core 1. Connecting bolts 3 connect the clamping plates 2 on the upper and lower sides of the core 1, and tensioning bolts 4 connect the clamping plates 2 on the front and rear sides of the core 1. Anti-deformation components 5 are installed opposite each other on the left and right sides of the clamping plates 2. The anti-deformation components 5 include a first support seat 6, a second support seat 7, and a connecting seat 8 installed on the clamping plates 2. The first support seat 6, the second support seat 7, and the connecting seat 8 are rotatably connected to a first rotating arm 9, a pressure rod 11, and a rotating seat 14 via pins. The rotating seat 14 is connected to one end of a support screw 12. A connecting block 10 is slidably fitted onto the support screw 12 and threadedly connected to a tightening nut 13. The connecting block 10 is rotatably connected to one end of a rotating arm 9 and a rotating arm 15 via a pin. The other end of the rotating arm 15 is rotatably connected to one end of a pressure rod 11 via a pin. Rotating the tightening nut 13 in the anti-deformation assembly 5 can press the middle part of the clamping plate 2 through the linkage mechanism, preventing the middle part of the clamping plate 2 from being deformed by the outward supporting force from the iron core. The pressure rod 11 has the characteristic of end-force amplification, which can firmly press the clamping plate 2. The support seat 6, support seat 7, and connecting seat 8 are all located directly in front of and directly behind the iron core 1. When the pressure rod 11 presses the clamping plate 2... The counter-thrust force acting on the support base 1 (6), support base 2 (7), and connecting base 8 is applied to the clamping plates 2 on both sides of the iron core 1. The iron core 1 provides support for the clamping plates 2 at this location, preventing the clamping plates 2 from moving towards the iron core 1 and deforming. The included angle between the rotating arm 1 (9) and the rotating arm 2 (15) is not less than 120 degrees. When the included angle of the toggle mechanism composed of the rotating arm 1 (9) and the connecting block 10 is greater than 120 degrees, the toggle mechanism is a force-increasing mechanism, which can effectively increase the pressure applied to the end of the pressure rod 11. The pressure rod 11 consists of a straight rod section 111 and an arc-shaped rod section 112. The support base 2 (7) connects the connection between the straight rod section 111 and the arc-shaped rod section 112 via a pin. The shaped rod segment 112 can reduce the space occupied on the one hand, and can be more evenly stressed during the pressing process, reducing its own deformation. The end face of the connecting block 10 facing the rotating seat 14 is close to the end face of the tightening nut 13. When the tightening nut 13 moves on the supporting screw 12, it can push the connecting block 10 to move away from the rotating seat 14, thereby driving the pressure rod 11 to rotate. There are two rotating arms 9, two pressure rods 11 and two rotating arms 15, which are arranged opposite to each other on both sides of the connecting block 10. The opposite arrangement of rotating arms 9, two pressure rods 11 and two rotating arms 15 ensures that the anti-deformation component 5 is evenly stressed during the pressing of the clamping plate 2.

[0030] The working principle of this technical solution is as follows: First, according to conventional operation, the clamping plate 2 is fastened and held on the outside of the iron core 1 by connecting bolt 3 and tension bolt 4. Then, the tightening nut 13 is rotated to move away from the rotating seat 14, thereby driving the connecting block 10 to move. The rotating arm 9 and rotating arm 15 are driven to rotate through the pin. When rotating arm 9 rotates, the supporting screw 12 is driven to rotate towards the supporting seat 7 with the pin on the connecting seat 8 and the rotating seat 14 as support. When rotating arm 15 rotates, the end of the straight rod section 111 is driven to move upward, thereby causing the end of the arc-shaped rod section 112 to move towards the clamping plate 2. This causes the pressure rod 11 to increase the force at the end and tighten the middle part of the clamping plate 2, preventing the middle part of the clamping plate 2 from being deformed by the outward supporting force from the iron core after the two ends of the clamping plate 2 are stretched.

[0031] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of the present invention, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A transformer core clamping device, comprising clamping plates (2) which are arranged in pairs on the upper and lower sides of a core (1), and connecting bolts (3) which are connected between the clamping plates (2) on the upper and lower sides of the core (1), and tensioning bolts (4) which are connected between the clamping plates (2) on the front and rear sides of the core (1), characterized in that: The left and right sides of the clamping plate (2) are oppositely provided with anti-deformation assemblies (5), the anti-deformation assemblies (5) comprise support seat one (6), support seat two (7) and connecting seat (8) installed on the clamping plate (2), the support seat one (6), the support seat two (7) and the connecting seat (8) are respectively connected with rotating arm one (9), pressing rod (11) and rotating seat (14) through pin shafts, one end of the rotating seat (14) is connected with support screw (12), the connecting block (10) is slidably sleeved on the support screw (12) and is threadedly connected with the top pressing nut (13), the connecting block (10) is rotatably connected with one end of rotating arm one (9) and rotating arm two (15) through pin shafts, the other end of the rotating arm two (15) is rotatably connected with one end of the pressing rod (11).

2. A transformer core clamping device according to claim 1, characterized in that: The support seat one (6), the support seat two (7) and the connecting seat (8) are arranged in front of and behind the iron core (1).

3. A transformer core clamping device according to claim 1, characterized in that: The included angle between the rotating arm one (9) and the rotating arm two (15) is not less than 120 degrees.

4. A transformer core clamping device according to claim 1, characterized in that: The pressing rod (11) is composed of straight rod section (111) and arc-shaped rod section (112), the support seat two (7) is connected with the connecting part of the straight rod section (111) and the arc-shaped rod section (112) through a pin shaft.

5. A transformer core clamping device according to claim 1, characterized in that: The end face of the connecting block (10) facing the rotating seat (14) abuts against the end face of the top pressing nut (13).

6. A transformer core clamping device according to claim 1, characterized in that: The number of the rotating arm one (9), the pressing rod (11) and the rotating arm two (15) is two, and they are oppositely arranged on both sides of the connecting block (10).

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