Dual-protection transformer
By installing temperature-controlled switches in the transformer and using the design of sector-shaped tooth plates and racks, the dual protection of the transformer is achieved, solving the problem of insufficient overload protection in the prior art, reducing costs and improving the safety and stability of the equipment.
Patent Information
- Application Number
- CN202421231450.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-05-31
AI Technical Summary
The lack of effective solutions for overload protection of existing transformers, resulting in complex circuits, high cost, and inapplicable under low power conditions, which cannot guarantee the safety and stability of electrical equipment.
A dual-protected transformer is designed to achieve overload protection by installing temperature-controlled switches in the transformer, and through the design of sector-shaped tooth plates and racks, the coil movement and maintenance are facilitated and maintenance costs are reduced.
It realizes effective overload protection for the transformer, avoids the risk of overload caused by excessive ambient temperature, simplifies the circuit structure, reduces costs, and facilitates the maintenance and maintenance of the transformer.
Smart Images
Figure CN222600661U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of transformers, and in particular to a transformer with double protection. Background Art
[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage.
[0003] At present, the products currently on the market only have short-circuit protection (with fuse terminals installed) on the transformer body, but no overload protection function. If overload protection is required, a temperature sensor needs to be installed and then protected through an external circuit.
[0004] In this case, the circuit is complicated and the cost is high. It is especially not applicable when the product power is small. However, if it is not protected, the safety and stability of the increasingly complex electrical equipment that requires stable and reliable operation cannot be guaranteed. Utility Model Content
[0005] In order to install a temperature control switch on the transformer, protection can be achieved in case of overload. For some transformers whose originally selected power is sufficient, but due to harmonics in the power grid system, leakage at the output end, or damage to the cooling system of the cabinet, the ambient temperature exceeds the standard, resulting in overload risks, it plays a good protective role. The present application provides a transformer with double protection.
[0006] A double-protected transformer provided by the present application adopts the following technical scheme: it includes a base plate, the middle part of the upper surface of the base plate is fixedly connected to the bottom of the box body, the bottom of the left end of the inner wall of the box body is fixedly connected to the bottom of the internal power box, and a circular plate is arranged at the top position of the right side of the inner wall of the internal power box through a rotating rod, the edge position of the circular plate is fixedly connected to one end of the sliding rod, and the other end of the sliding rod is slidably connected to the inner wall of the slide groove at the middle position of the top of the fan-shaped tooth plate, the teeth at the circular arc position of the bottom of the fan-shaped tooth plate are meshed with the teeth on the upper surface of the rack, the middle position of the bottom position of the rack is fixedly connected to the top of the fixed rod, the bottom of the fixed rod is slidably sleeved on the outer circumferential surface of the middle part of the cross bar, and the two ends of the cross bar are fixedly arranged at the bottom of the right end of the inner wall of the box body through support rods.
[0007] The middle part of the left side of the rack is fixedly connected to one end of the limiting slide, the other end of the limiting slide passes through the bottom of the left side of the internal power box and is fixedly connected to the middle part of the right side of the chassis, the middle part of the upper surface of the chassis is clamped with the bottom of the coil, the outer circumference of the coil is in contact with the inner side of the temperature switch at a distance of two-thirds from the bottom, the middle part of the outer side of the temperature switch is fixedly connected to one end of the telescopic rod, and the other end of the telescopic rod is fixedly connected to the middle part of one side of the inner wall of the box.
[0008] Optionally, the four corners of the base plate are provided with card slots, and the edges of the base plate are rounded.
[0009] Optionally, the center position of the bottom of the fan-shaped tooth plate is set at the middle of one side of the inner wall of the internal power box by rotating the rotating rod, the thickness of the fan-shaped tooth plate is the same as the thickness of the rack, and the width of the slide groove at the top position of the fan-shaped tooth plate is the same as the diameter of the slide rod.
[0010] Optionally, a trapezoidal slider is fixedly provided at the left end of the chassis, the left side of the trapezoidal slider is slidably provided on the inner wall of the slide groove on the left side of the inner wall of the box body, and a heat dissipation hole is fixedly provided on the upper surface of the chassis.
[0011] Optionally, a fuse terminal is fixedly provided near the top of the coil, the fuse terminal is located on one side of the temperature switch, and two symmetrical fixing buckles are fixedly provided on the top of the coil.
[0012] Optionally, the sliding rod is located at a position two-thirds away from the center of the circular plate, and the length of the sliding rod is less than the thickness of the inner wall of the internal power box.
[0013] Optionally, the height of the box is far away from the top of the coil, a rotating groove is fixedly provided at the bottom of the right side of the box, the diameter of the rotating groove is larger than the diameter of the rotating disk outside the circular plate, and the width of the box is smaller than the width of the base plate.
[0014] In summary, this application includes the following beneficial technical effects:
[0015] 1. The utility model sets a rack on one side of the chassis to swing back and forth under the action of the fan-shaped tooth plate, so as to facilitate the upper coil to extend out of the box body and control the displacement of the coil. Not only can the coil be moved for heat dissipation treatment, but also the external power line is conveniently connected with the inside of the transformer, so as to achieve the effect of facilitating the operation and handling of the transformer, and at the same time facilitate the maintenance of the inside of the transformer, thereby reducing the cost investment in maintenance and repair of the transformer.
[0016] 2. The utility model can achieve overload protection by installing a temperature control switch on the transformer. It plays a good protective role for some situations where the originally selected power is sufficient, but due to harmonics in the power grid system, leakage at the output end, or damage to the cooling system of the cabinet, the ambient temperature exceeds the standard, resulting in overload risks. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the inner side of the internal power box in the embodiment of the present application;
[0018] Figure 2 is a structural cross-sectional view of the front side of the embodiment of the present application;
[0019] Figure 3 is a schematic diagram of the three-dimensional cross-sectional structure of the box body in the embodiment of the present application;
[0020] Figure 4It is a schematic diagram of the overall three-dimensional structure in the embodiment of the present application.
[0021] Figure numerals: 1. base plate; 2. box body; 3. cross bar; 4. rack; 5. internal power box; 6. chassis; 7. coil; 8. temperature switch; 9. fuse terminal; 10. fixing rod; 11. limiting slide plate; 12. circular plate; 13. fan-shaped tooth plate; 14. fixing buckle; 15. telescopic rod; 16. sliding rod; 17. trapezoidal slider. DETAILED DESCRIPTION
[0022] The following is combined with Figure 1-4 This application is described in further detail.
[0023] The present application embodiment discloses a transformer with double protection. Figure 1 As shown, it includes a base plate 1, and the four corners of the base plate 1 are provided with slots. The edges of the base plate 1 are rounded, and the slots around the base plate 1 are convenient for fixing the transformer, thereby increasing the stability when installing the transformer.
[0024] See also Figure 1 The middle part of the upper surface of the base plate 1 is fixedly connected to the bottom of the box body 2, and the bottom of the left end of the inner wall of the box body 2 is fixedly connected to the bottom of the internal power box 5. A circular plate 12 is arranged at the top position of the right side of the inner wall of the internal power box 5 through a rotating rod. The edge position of the circular plate 12 is fixedly connected to one end of the sliding rod 16. The sliding rod 16 is located at two-thirds of the circular plate 12 away from the center of the circle. The length of the sliding rod 16 is less than the inner wall thickness of the internal power box 5. The sliding rod 16 is located at two-thirds of the circular plate 12, so that the circular plate 12 reaches the movement principle of the eccentric wheel. The other end of the sliding rod 16 is slidably connected to the inner wall of the slide groove at the middle position of the top of the fan-shaped toothed plate 13, and the teeth at the arc position of the bottom of the fan-shaped toothed plate 13 are meshed with the teeth on the upper surface of the rack 4. The middle position of the bottom position of the rack 4 is fixedly connected to the top of the fixed rod 10, and the bottom of the fixed rod 10 is slidably sleeved on the outer circumferential surface of the middle part of the cross bar 3, and the two ends of the cross bar 3 are fixedly arranged at the bottom of the right end of the inner wall of the box body 2 through support rods.
[0025] See also Figure 1 A fuse terminal 9 is fixedly provided near the top of the coil 7, and the fuse terminal 9 is located on one side of the temperature switch 8. Two symmetrical fixing buckles 14 are fixedly provided on the top of the coil 7, and the temperature switch is placed close to the winding so that it can well sense the input and output temperatures.
[0026] See also Figure 2The center position of the bottom of the fan-shaped tooth plate 13 is set at the middle of one side of the inner wall of the internal power box 5 through the rotation of the rotating rod. The thickness of the fan-shaped tooth plate 13 is the same as the thickness of the rack 4. The width of the slide groove at the top position of the fan-shaped tooth plate 13 is the same as the diameter of the slide rod 16. The fan-shaped tooth plate 13 is set on the inner wall of the internal power box 5 to limit the fan-shaped tooth plate 13 and ensure the rotation range of the fan-shaped tooth plate 13.
[0027] See also Figure 2 The middle part of the left side of the rack 4 is fixedly connected to one end of the limiting slide plate 11, and the other end of the limiting slide plate 11 passes through the bottom of the left side of the internal power box 5 and is fixedly connected to the middle part of the right side of the chassis 6. The middle part of the upper surface of the chassis 6 is clamped with the bottom of the coil 7, and the outer circumference of the coil 7 is in contact with the inner side of the temperature switch 8 at two-thirds away from the bottom. The middle part of the outer side of the temperature switch 8 is fixedly connected to one end of the telescopic rod 15, and the other end of the telescopic rod 15 is fixedly connected to the middle part of one side of the inner wall of the box body 1.
[0028] See also Figure 2 The center position of the bottom of the fan-shaped tooth plate 13 is set at the middle of one side of the inner wall of the internal power box 5 through the rotation of the rotating rod. The thickness of the fan-shaped tooth plate 13 is the same as the thickness of the rack 4. The width of the slide groove at the top position of the fan-shaped tooth plate 13 is the same as the diameter of the slide rod 16. The fan-shaped tooth plate 13 is set on the inner wall of the internal power box 5 to limit the fan-shaped tooth plate 13 and ensure the rotation range of the fan-shaped tooth plate 13.
[0029] See also Figure 2 A trapezoidal slider 17 is fixedly provided at the left end of the chassis 6, and the left side of the trapezoidal slider 17 is slidably provided on the inner wall of the slide groove on the left side of the inner wall of the box body 2. A heat dissipation hole is fixedly provided on the upper surface of the chassis 6. The trapezoidal slider 17 on the side of the chassis 6 slides on the side of the box body 2, thereby increasing the stability of the chassis 6 when sliding.
[0030] See also Figure 3 The height of the box body 2 is far away from the top of the coil 7. A rotating groove is fixedly provided at the bottom of the right side of the box body 2. The diameter of the rotating groove is larger than the diameter of the rotating disk outside the circular plate 12. The width of the box body 2 is smaller than the width of the base plate 1. A higher box body 2 is set to avoid movement conflict between the coil 7 and the top of the box body 2 when moving.
[0031] The implementation principle of a double-protected transformer in the embodiment of the present application is as follows: the power cord is connected to the inside of the fixed buckle 14 to achieve the effect of connecting with the internal coil 7 of the transformer. When the coil inside the transformer needs to be inspected, the rotating circular plate 12 drives the sliding rod 16 to rotate, and the sliding rod 16 drives the fan-shaped toothed plate 13 to swing when rotating. When the fan-shaped toothed plate 13 swings, the rack 4 drives the chassis 6 to extend out of the outside of the transformer through the teeth at the bottom. The rack 4 drives the chassis 6 to extend out of the outside of the transformer, which is convenient for inspecting the inside of the transformer. According to the insulation grade of the product and the rated current of the winding, the normally closed temperature switch 8 is selected, and the temperature is set at two-thirds of the height of the coil, between the primary and secondary edges of the transformer coil 7. The switch 8 is placed close to the winding so that it can well sense the input and output temperatures. When the user connects the wires, one end of the power supply is connected to the fuse terminal 9. When the transformer is working, when an overload occurs, whether it is primary (sometimes caused by harmonics, the output is not overloaded) or secondary overload (secondary short circuit, inexplicable increase in load, leakage), the product temperature rise exceeds the temperature of the temperature switch 8. At this time, the temperature switch 8 will be disconnected, cutting off the power supply of the transformer to achieve the purpose of overload protection. When a short circuit occurs in the transformer or the product, the fuse in the fuse terminal 9 will melt for short-circuit protection. During maintenance, it is possible to measure whether the fuse terminal 9 and the temperature switch 8 are conductive to check whether it is short-circuit protection or overload protection.
[0032] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A double-protected transformer, comprising a base plate (1), characterized in that: The middle part of the upper surface of the base plate (1) is fixedly connected to the bottom of the box body (2), the bottom of the left end of the inner wall of the box body (2) is fixedly connected to the bottom of the internal power box (5), and a circular plate (12) is arranged at the top position of the right side of the inner wall of the internal power box (5) by rotating through a rotating rod, the edge position of the circular plate (12) is fixedly connected to one end of a sliding rod (16), and the other end of the sliding rod (16) is slidably connected to the inner wall of the slide groove at the middle position of the top of the fan-shaped toothed plate (13), the teeth at the circular arc position of the bottom of the fan-shaped toothed plate (13) are meshed with the teeth on the upper surface of the rack (4), and the middle position of the bottom position of the rack (4) is fixedly connected to the top of the fixed rod (10), and the bottom of the fixed rod (10) is slidably sleeved on the outer circumferential surface of the middle part of the cross rod (3), and the two ends of the cross rod (3) are fixedly arranged at the bottom of the right end of the inner wall of the box body (2) through support rods; The middle part of the left side of the rack (4) is fixedly connected to one end of the limiting slide plate (11), the other end of the limiting slide plate (11) passes through the bottom of the left side of the internal power box (5) and is fixedly connected to the middle part of the right side of the chassis (6), the middle part of the upper surface of the chassis (6) is clamped with the bottom of the coil (7), the outer circumference of the coil (7) is in contact with the inner side of the temperature switch (8) at a distance of two-thirds from the bottom, the middle part of the outer side of the temperature switch (8) is fixedly connected to one end of the telescopic rod (15), and the other end of the telescopic rod (15) is fixedly connected to the middle part of one side of the inner wall of the box body (2).
2. A double-protected transformer according to claim 1, characterized in that: The four corners of the base plate (1) are all provided with card slots, and the edges of the base plate (1) are rounded.
3. A double-protected transformer according to claim 1, characterized in that: The center position of the bottom of the sector-shaped tooth plate (13) is set at the middle of one side of the inner wall of the internal power box (5) by rotating the rotating rod, the thickness of the sector-shaped tooth plate (13) is the same as the thickness of the rack (4), and the width of the slide groove at the top position of the sector-shaped tooth plate (13) is the same as the diameter of the slide rod (16).
4. A double-protected transformer according to claim 1, characterized in that: A trapezoidal slider (17) is fixedly provided at the left end of the chassis (6), the left side of the trapezoidal slider (17) is slidably arranged on the inner wall of the slide groove on the left side of the inner wall of the box body (2), and a heat dissipation hole is fixedly provided on the upper surface of the chassis (6).
5. A double-protected transformer according to claim 1, characterized in that: A fuse terminal (9) is fixedly arranged near the top of the coil (7), the fuse terminal (9) is located on one side of the temperature switch (8), and two symmetrical fixing buckles (14) are fixedly arranged on the top of the coil (7).
6. A double-protected transformer according to claim 1, characterized in that: The slide rod (16) is located at a position two-thirds away from the center of the circular plate (12), and the length of the slide rod (16) is less than the thickness of the inner wall of the internal power box (5).
7. A double-protected transformer according to claim 1, characterized in that: The height of the box (2) is far away from the top of the coil (7), and a rotating groove is fixedly provided at the bottom of the right side of the box (2), the diameter of the rotating groove is larger than the diameter of the rotating disk outside the circular plate (12), and the width of the box (2) is smaller than the width of the base plate (1).