Clamp for upper yoke and lower yoke of transformer iron core
By using crank slider mechanism and pawl assembly in the upper and lower yoke clamps of the transformer core, the problem of insufficient clamping force is solved, ensuring stable clamping of the silicon steel sheet, and improving the operating stability and performance of the transformer.
Patent Information
- Application Number
- CN202421353067.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-14
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-06-14
AI Technical Summary
After long-term use of the transformer core, the vibration caused by magnetostriction of the silicon steel sheet leads to insufficient clamping force of the clamping parts, which in turn causes loosening of the silicon steel sheet, affecting the normal operation of the transformer.
A transformer core upper and lower yoke clamp is adopted, including a rectangular frame and a connecting rod mechanism. Through the cooperation of the crank slider mechanism and the pawl assembly, the distance between the long beams remains unchanged, thereby keeping the clamping force unchanged.
It effectively solves the problem of insufficient clamping force after long-term use, ensures that the silicon steel sheet in the upper and lower yokes of the iron core will not loosen, and ensures the normal operation and stable performance of the transformer.
Smart Images
Figure CN222690483U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of transformers, in particular to an upper and lower yoke clamp of a transformer iron core. Background Art
[0002] The transformer core is the main magnetic circuit part of the transformer. It is usually made up of several silicon steel sheets stacked together, and the upper and lower yokes of the core are clamped and fixed by clamping parts, which are clamped by screws and nuts.
[0003] When the transformer is working, the magnetostriction of the silicon steel sheet will cause the core to vibrate, and then cause the nut to vibrate. After long-term use, the nut will loosen, causing the distance between the two nuts on the same screw to increase, resulting in insufficient clamping force of the clamp, and then causing several silicon steel sheets in the upper and lower yokes to loosen. The loose silicon steel sheet will have a negative impact on the normal operation of the transformer, such as: gaps are generated at the seams of the silicon steel sheets, resulting in increased magnetic resistance, increased heat, poor conversion efficiency, increased noise, etc.
[0004] Therefore, it is necessary to develop a transformer core upper and lower yoke clamp to address the above defects. Utility Model Content
[0005] The utility model aims to provide a transformer core upper and lower yoke clamp, which can solve the defect that the clamping force of the clamp is insufficient after long-term use, resulting in the loosening of silicon steel sheets in the core upper and lower yokes.
[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:
[0007] The utility model discloses a transformer core upper and lower yoke clamp, comprising:
[0008] A rectangular parallelepiped frame comprises two symmetrically spaced square frames and four long beams erected between the two square frames, wherein the two long beams on one side are a first group and are fixedly connected to the frame, and the two long beams on the other side are a second group and are guided and slidably connected to the frame;
[0009] A connecting rod mechanism, comprising a crank and a connecting rod, wherein a rotating shaft is fixedly arranged at one end of the crank, and the other end of the crank is hinged to the first end of the connecting rod; the connecting rod mechanism is provided with four connecting rods, and the second ends of the four connecting rods are respectively rotatably connected to the ends of the corresponding long beams in the second group through a pin seat;
[0010] One end of the rotating shaft rotates through the square frame and is coaxially fixedly connected with a ratchet wheel. The rotating shaft protrudes out of the ratchet wheel. A pawl assembly for preventing the ratchet wheel from rotating in reverse is provided on the square frame.
[0011] Furthermore, the long beam is a channel steel profile, and the long beam of the first group is arranged back to back with the long beam of the second group; the square frame includes two horizontally arranged channel steel beams and two vertically arranged support beams, and the channel steel beams are fixedly connected to the support beams; the two long beams in the second group are respectively slidably matched with the grooves of the corresponding channel steel beams.
[0012] Furthermore, a through pipe is fixed in the groove of the channel steel beam, reinforcing ribs are provided on both sides of the through pipe, and the rotating shaft coaxially rotates through the through pipe; a guard edge is fixed at the connection between the crank and the rotating shaft, and one side of the guard edge is in rotational contact with the end face of the through pipe.
[0013] Furthermore, a hexagonal tube is fixed to the portion of the rotating shaft that protrudes out of the ratchet wheel.
[0014] Furthermore, one end of the rotating shaft is a regular hexagonal prism, and the longest diagonal of the regular hexagonal prism is less than or equal to the diameter of the rotating shaft; the center hole of the ratchet matches the regular hexagonal prism; the center hole of the hexagonal tube matches the regular hexagonal prism; the first end face of the hexagonal tube contacts one side of the ratchet; the end of the regular hexagonal prism is coaxially provided with an annular groove, a retaining ring is clamped in the annular groove, and one side of the retaining ring contacts the second end face of the hexagonal tube.
[0015] Furthermore, it also includes a scale, which is arranged on the top surface of the channel steel beam and located on a side close to the long beam in the second group.
[0016] Furthermore, a reinforcing strip is fixed to the middle of the bottom wall of the groove of the long beam, and the reinforcing strip is arranged along the length direction of the long beam and is perpendicular to the bottom wall of the groove of the long beam.
[0017] Furthermore, a lifting lug is fixed on the top of the frame.
[0018] Furthermore, the pawl assembly includes a pawl and a tension spring, the middle portion of the pawl is rotatably connected to the frame, the end portion of the pawl is engaged with the ratchet teeth of the ratchet wheel, the tail portion of the pawl is connected to the first end of the tension spring, and the second end of the tension spring is connected to the frame.
[0019] Compared with the prior art, the beneficial technical effects of the utility model are:
[0020] The utility model discloses a transformer core upper and lower yoke clamp, wherein the crank, the connecting rod and the long beam in the second group form a crank slider mechanism, and the pawl assembly prevents the ratchet from rotating in the opposite direction, so that the crank slider mechanism cannot act, and therefore, the distance between the long beam in the first group and the long beam in the second group will not change, so that after long-term use, the clamping force of the two on the upper and lower yokes of the core remains unchanged, thereby ensuring that the silicon steel sheets in the upper and lower yokes of the core will not loosen. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The utility model will be further described below in conjunction with the accompanying drawings.
[0022] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;
[0023] Figure 2 for Figure 1 Schematic diagram of the exploded structure of some parts;
[0024] Figure 3 It is a schematic diagram of the assembly structure of the utility model and the transformer core.
[0025] Explanation of the reference numerals in the accompanying drawings: 1. Support beam; 2. Long beam; 3. Crank; 301. Rotating shaft; 302. Flange; 303. Annular groove; 4. Connecting rod; 5. Ratchet; 6. Pawl; 7. Channel beam; 8. Through pipe; 801. Reinforcing rib; 9. Hexagonal tube; 10. Circlip; 11. Scale; 12. Reinforcing slat; 13. Lifting ear; 14. Tension spring; 15. Triangular block. DETAILED DESCRIPTION
[0026] The core of the utility model is to provide a transformer core upper and lower yoke clamp, which can solve the defect that the clamping force of the clamp is insufficient after long-term use, resulting in the loosening of silicon steel sheets in the core upper and lower yokes.
[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0028] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "middle", etc., indicating directions or positional relationships, are based on the directions 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.
[0029] In a specific embodiment of the present invention, Figures 1 to 3 As shown, including:
[0030] The rectangular parallelepiped frame includes two symmetrically spaced square frames and four long beams 2 erected between the two square frames, the two long beams 2 on one side are the first group and are fixedly connected to the square frame, and the two long beams 2 on the other side are the second group and are guided and slidably connected to the square frame;
[0031] The connecting rod mechanism comprises a crank 3 and a connecting rod 4. A rotating shaft 301 is fixedly arranged at one end of the crank 3, and the other end of the crank 3 is hinged to the first end of the connecting rod 4. The connecting rod mechanism is provided with four connecting rods, and the second ends of the four connecting rods 4 are respectively rotatably connected to the ends of the corresponding long beams 2 in the second group through the pin seats.
[0032] One end of the rotating shaft 301 rotates through the square frame and is coaxially fixedly connected with a ratchet 5, the rotating shaft 301 protrudes out of the ratchet 5, and the square frame is provided with a pawl assembly to prevent the ratchet 5 from rotating in reverse. The ratchet 5 can be welded to the rotating shaft 301, or other fixed connection methods in the prior art can be adopted.
[0033] Specifically, the long beam 2 at the top of the first group and the long beam 2 at the top of the second group are used for the upper yoke of the clamping iron core, and the long beam 2 at the bottom of the first group and the long beam 2 at the bottom of the second group are used for the lower yoke of the clamping iron core. The crank 3, the connecting rod 4 and the long beam 2 in the second group form a crank slider mechanism, and the long beam 2 in the second group is equivalent to a slider; the rotating shaft 301 is clamped by a tool at the part protruding from the ratchet 5 and rotated forward, thereby driving the rotating shaft 301 to rotate, the rotating shaft 301 drives the crank 3 to swing, the crank 3 drives the connecting rod 4 to move, and the connecting rod 4 drives the long beam 2 in the second group to slide toward the long beam 2 in the first group and clamp the upper and lower yokes of the iron core; the pawl assembly prevents the ratchet 5 from rotating in the reverse direction, and the crank slider mechanism cannot move, therefore, the distance between the long beam 2 of the first group and the long beam 2 of the second group will not change, and the clamping force of the two on the upper and lower yokes of the iron core will remain unchanged after long-term use, ensuring that the silicon steel sheets in the upper and lower yokes of the iron core will not loosen.
[0034] The long beams 2 are channel steel profiles, and the long beams 2 of the first group are arranged back to back with the long beams 2 of the second group; the frame comprises two horizontally arranged channel steel beams 7 and two vertically arranged support beams 1, and the channel steel beams 7 are fixedly connected to the support beams 1; the two long beams 2 in the second group are respectively slidably matched with the grooves of the corresponding channel steel beams 7. That is, the long beams 2 in the second group are slidably connected with the frame guide.
[0035] A through pipe 8 is fixed in the groove of the channel steel beam 7, and reinforcing ribs 801 are arranged on both sides of the through pipe 8. The rotating shaft 301 coaxially rotates through the through pipe 8; a retaining edge 302 is fixed at the connection between the crank 3 and the rotating shaft 301, and one side of the retaining edge 302 is in rotational contact with the end face of the through pipe 8. Specifically, the through pipe 8 plays a supporting role for the rotating shaft 301.
[0036] The part of the rotating shaft 301 protruding from the ratchet 5 is fixed with a hexagonal tube 9. Specifically, the hexagonal tube 9 can be welded to the rotating shaft 301; the hexagonal tube 9 is clamped by a tool and rotated, so that the hexagonal tube 9 drives the rotating shaft 301 to rotate. If the hexagonal tube 9 is not provided, the tool is not easy to clamp the rotating shaft 301.
[0037] One end of the rotating shaft 301 is a regular hexagonal prism, and the longest diagonal of the regular hexagonal prism is less than or equal to the diameter of the rotating shaft 301; the center hole of the ratchet 5 matches the regular hexagonal prism; the center hole of the hexagonal tube 9 matches the regular hexagonal prism; the first end face of the hexagonal tube 9 contacts one side of the ratchet 5; the end of the regular hexagonal prism is coaxially provided with an annular groove 303, and a retaining ring 10 is clamped in the annular groove 303, and one side of the retaining ring 10 contacts the second end face of the hexagonal tube 9. Specifically, when this embodiment is adopted, the ratchet 5 and the hexagonal tube 9 do not need to be welded to the rotating shaft 301. It is worth adding that the hexagonal tube 9 and the ratchet 5 can be welded together or integrally formed by mechanical processing.
[0038] It also includes a scale 11, which is set on the top surface of the channel steel beam 7 and is located on one side close to the long beam 2 in the second group. Specifically, visually observe the scale lines corresponding to the scale 11 on the back of the long beam 2 in the second group or use a ruler against the back of the long beam 2 to observe the correspondence between the ruler and the scale lines. Similar methods are no longer listed one by one; a triangular block 15 can also be set on the long beam 2 of the second group, and the visual inspection accuracy is improved by the correspondence between the top edge line of the triangular block 15 and the scale lines; different scale lines represent different distances between the back of the long beam 2 in the second group and the back of the long beam 2 in the first group, which can also indirectly represent the clamping force of the long beam 2 on the upper and lower yokes of the iron core. The scale 11 can be set as a sticker or directly engraved on the channel steel beam 7; it is worth noting that if it is in the form of a sticker, the sticker needs to be torn off after the utility model is assembled with the iron core, unless it is a high temperature resistant sticker.
[0039] A reinforcing strip 12 is fixed in the middle of the bottom wall of the groove of the long beam 2, and the reinforcing strip 12 is arranged along the length direction of the long beam 2 and perpendicular to the bottom wall of the groove of the long beam 2. That is, the cross section of the long beam 2 is E-shaped, which enhances the deformation resistance of the long beam 2.
[0040] A lifting lug 13 is fixed to the top of the frame.
[0041] The pawl assembly includes a pawl 6 and a tension spring 14, the middle of the pawl 6 is rotatably connected to the frame, the end of the pawl 6 is engaged with the ratchet teeth of the ratchet wheel 5, the tail of the pawl 6 is connected to the first end of the tension spring 14, and the second end of the tension spring 14 is connected to the frame. Figures 1 to 3As shown, a nut is welded in the frame, and a bolt is rotatably connected to the middle of the pawl 6. The bolt passes through the frame and is threadedly connected to the nut, and the threaded connection is strengthened by a high-temperature resistant thread fastening glue. Other connection methods in the prior art can also be used, such as replacing the bolt with a pin, welding the root of the pin to the frame, and setting a split pin or a spring retaining ring at the end of the pin. The ratchet 5 and the pawl assembly form a ratchet mechanism, and the connection method of the two ends of the tension spring 14 with the frame and the tail of the pawl 6 belongs to the prior art, which can be welded or hooked, and this specification will not be repeated in detail.
[0042] The utility model discloses a working principle of a transformer core upper and lower yoke clamp: the long beam 2 at the top of the first group and the long beam 2 at the top of the second group are used for the upper yoke of the clamp core, and the long beam 2 at the bottom of the first group and the long beam 2 at the bottom of the second group are used for the lower yoke of the clamp core. The crank 3, the connecting rod 4 and the long beam 2 in the second group form a crank slider mechanism, and the long beam 2 in the second group is equivalent to a slider; the rotating shaft 301 is clamped by a tool to protrude the ratchet 5 and rotate forward, thereby driving the rotating shaft 301 to rotate, the rotating shaft 301 drives the crank 3 to swing, the crank 3 drives the connecting rod 4 to move, and the connecting rod 4 drives the long beam 2 in the second group to slide toward the long beam 2 in the first group and clamp the upper and lower yokes of the core; the pawl assembly prevents the ratchet 5 from rotating in the reverse direction, and the crank slider mechanism cannot act, therefore, the distance between the long beam 2 of the first group and the long beam 2 of the second group will not change, and the clamping force of the two on the upper and lower yokes of the core will remain unchanged after long-term use, ensuring that the silicon steel sheets in the upper and lower yokes of the core will not loosen.
[0043] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other, and the embodiments can be combined with each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.
[0044] The above embodiments are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.
Claims
1. A transformer core upper and lower yoke clamp, characterized in that: include: A rectangular parallelepiped frame comprises two square frames symmetrically arranged at intervals and four long beams (2) erected between the two square frames, wherein the two long beams (2) located on one side are a first group and are fixedly connected to the square frame, and the two long beams (2) located on the other side are a second group and are guide-slidably connected to the frame; A connecting rod mechanism comprises a crank (3) and a connecting rod (4); a rotating shaft (301) is fixedly provided at one end of the crank (3), and the other end of the crank (3) is hinged to the first end of the connecting rod (4); the connecting rod mechanism is provided with four connecting rods, and the second ends of the four connecting rods (4) are respectively rotatably connected to the ends of the corresponding long beams (2) in the second group through pin seats; One end of the rotating shaft (301) rotates through the square frame and is coaxially fixedly connected with a ratchet (5); the rotating shaft (301) protrudes out of the ratchet (5); and a ratchet assembly is provided on the square frame to prevent the ratchet (5) from rotating in the reverse direction.
2. The transformer core upper and lower yoke clamps according to claim 1, characterized in that: The long beams (2) are channel steel profiles, and the long beams (2) of the first group and the long beams (2) of the second group are arranged back to back; the square frame comprises two horizontally arranged channel steel beams (7) and two vertically arranged support beams (1), and the channel steel beams (7) are fixedly connected to the support beams (1); the two long beams (2) in the second group are respectively slidably matched with the grooves of the corresponding channel steel beams (7).
3. The transformer core upper and lower yoke clamps according to claim 2, characterized in that: A through pipe (8) is fixed in the groove of the channel steel beam (7), and reinforcing ribs (801) are provided on both sides of the through pipe (8). The rotating shaft (301) coaxially rotates through the through pipe (8); a retaining edge (302) is fixed at the connection between the crank (3) and the rotating shaft (301), and one side of the retaining edge (302) is in rotational contact with the end face of the through pipe (8).
4. The transformer core upper and lower yoke clamps according to claim 3, characterized in that: A hexagonal tube (9) is fixed to the portion of the rotating shaft (301) that protrudes out of the ratchet wheel (5).
5. The transformer core upper and lower yoke clamps according to claim 4, characterized in that: One end of the rotating shaft (301) is a regular hexagonal prism, and the longest diagonal of the regular hexagonal prism is less than or equal to the diameter of the rotating shaft (301); the center hole of the ratchet (5) matches the regular hexagonal prism; the center hole of the hexagonal tube (9) matches the regular hexagonal prism; the first end face of the hexagonal tube (9) contacts one side of the ratchet (5); the end of the regular hexagonal prism is coaxially provided with an annular groove (303), a retaining ring (10) is clamped in the annular groove (303), and one side of the retaining ring (10) contacts the second end face of the hexagonal tube (9).
6. The transformer core upper and lower yoke clamps according to any one of claims 2 to 5, characterized in that: It also comprises a scale (11), which is arranged on the top surface of the channel steel beam (7) and is located on a side close to the long beam (2) in the second group.
7. The transformer core upper and lower yoke clamps according to claim 2, characterized in that: A reinforcing strip (12) is fixed in the middle of the bottom wall of the groove of the long beam (2); the reinforcing strip (12) is arranged along the length direction of the long beam (2) and is perpendicular to the bottom wall of the groove of the long beam (2).
8. The transformer core upper and lower yoke clamps according to claim 1, characterized in that: A lifting lug (13) is fixed on the top of the square frame.
9. The transformer core upper and lower yoke clamps according to claim 1, characterized in that: The pawl assembly comprises a pawl (6) and a tension spring (14), the middle portion of the pawl (6) is rotatably connected to the frame, the end portion of the pawl (6) is meshed with the ratchet teeth of the ratchet wheel (5), the tail portion of the pawl (6) is connected to the first end of the tension spring (14), and the second end of the tension spring (14) is connected to the frame.