A tap changer incorporating an idle coil of a transformer tap region into operation

Abstract

The application discloses a kind of idle coil of transformer tapping area is incorporated into running tap switch, including two pole bodies, two described pole bodies are respectively installed with three groups of contact groups, the end of each group described contact group is connected with middle insulating conductive rod, two described pole bodies are respectively slidably connected with three moving frames, and the moving frame is respectively contacted with conductive rod and contact group;Switch height is changed from conventional three-layer structure to one layer, and the height direction is reduced by two-thirds, about 150mm. Take S22-2000 / 10 transformer as an example, about 210kg of transformer oil and steel material is saved, and about 2100 yuan of cost is saved. The original switch is wired 36 roots per unit, and the present switch is internally connected for each same name end, and only 18 roots are required externally. The same as conventional switch wiring, workers do not need separate training, and the workload is reduced by 50%.

Description

Technical Field

[0001] This invention relates to the field of transformer technology, specifically to a tap changer that integrates idle coils in the transformer tap zone into operation. Background Technology

[0002] Currently, power transformers typically operate at their rated taps, with the high-voltage rated taps to the maximum tap coils remaining idle (see appendix for the principle). Figure 7 Traditional solutions result in significant waste of wiring; a few manufacturers utilize three-layer composite switches (see appendix). Figure 8 The idle coil is then incorporated into the operating area (see attached schematic diagram). Figure 7 The new design requires the oil tank to be raised by 150mm because the switch is two layers higher than the conventional switch, which greatly increases the amount of transformer oil used. The wiring of the three-layer composite switch is complicated and can easily cause product quality problems due to wiring errors.

[0003] To address this, a tap changer is proposed that integrates idle coils in the transformer tap changer area into the operating circuit. Summary of the Invention

[0004] The purpose of this invention is to provide a tap changer that integrates idle coils in the transformer tap changer area into operation, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a tap changer that integrates idle coils in the tap changer area of ​​a transformer into operation, comprising two rods, each of which is equipped with three sets of contact groups, and a conductive rod with central insulation is connected between the ends of each set of contact groups. Three movable frames are slidably connected to each of the two rods, and the movable frames are in contact with the conductive rods and contact groups respectively.

[0006] A fixed frame is installed between the two rods, and a gear is rotatably connected to the fixed frame. A connecting rod is provided above each of the two rods, and each connecting rod is fixedly connected to three movable frames. A rack is installed on the connecting rod, and the rack meshes with the gear.

[0007] Preferably, each contact group includes seven contact rods, and the corresponding ends within each contact group are internally connected.

[0008] Preferably, the conductive rod comprises a first conductor, an insulator, and a second conductor;

[0009] The first conductor and the second conductor are respectively connected to two contact rods at the end of each group of contacts, and an insulator is connected between the first conductor and the second conductor.

[0010] Preferably, the insulator is located in the gap between the middle contact rod and the left or right contact rod.

[0011] Preferably, two first protrusions are symmetrically installed on one side of the interior of the movable frame, and the two first protrusions are in contact with the conductive rod.

[0012] Preferably, two second protrusions are symmetrically installed on the other side of the interior of the movable frame, and the two second protrusions are in contact with the contact rod.

[0013] Preferably, a knob for driving gears to rotate is installed above the fixing frame.

[0014] Compared with the prior art, the beneficial effects of this invention are: the switch height is changed from the conventional three-layer structure to a single layer, reducing the height by two-thirds, approximately 150mm. Taking the S22-2000 / 10 transformer as an example, it saves approximately 210kg of transformer oil and steel, saving approximately 2100 yuan in costs. The original switch had 36 wires per unit, while this switch connects each identical terminal internally, requiring only 18 external wires, the same as the conventional switch wiring. Workers do not need separate training, reducing workload by 50%. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention;

[0016] Figure 2 This is a bottom-view structural diagram of the present invention;

[0017] Figure 3 This is a side view of the structure of the present invention;

[0018] Figure 4 This is a schematic diagram of the structure of the mobile frame of the present invention;

[0019] Figure 5 This is a top view of the structure of the present invention;

[0020] Figure 6 This is a schematic diagram of the connection of phase A and segment AB of the present invention;

[0021] Figure 7 Wiring diagrams for the traditional and new solutions;

[0022] Figure 8 This is a schematic diagram of a traditional three-layer composite switch.

[0023] In the diagram: 1. Rod; 2. Contact assembly; 21. Contact rod; 3. Conductive rod; 31. First conductor; 32. Insulator; 33. Second conductor; 4. Moving frame; 41. First protrusion; 42. Second protrusion; 5. Fixing frame; 6. Knob; 7. Gear; 8. Connecting rod; 9. Rack. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0025] Please see Figure 1-7 The present invention provides a technical solution: a tap changer that integrates idle coils in the tap changer area of ​​a transformer into operation, comprising two rods 1, each rod 1 having three sets of contact groups 2 respectively, each set of contact groups 2 having a conductive rod 3 with central insulation connected between the ends, and each rod 1 having three movable frames 4 slidably connected to each other, the movable frames 4 being in contact with the conductive rod 3 and the contact groups 2 respectively.

[0026] A fixed frame 5 is installed between the two rods 1. A gear 7 is rotatably connected to the fixed frame 5. A connecting rod 8 is provided above each of the two rods 1. Each connecting rod 8 is fixedly connected to three movable frames 4. A rack 9 is installed on the connecting rod 8. The rack 9 is meshed with the gear 7.

[0027] like Figures 1 to 5 As shown: Each contact group 2 includes seven contact rods 21, and the corresponding ends within each contact group 2 are internally connected; through the above configuration, with the attached... Figure 6 Taking the wiring diagram of phase A, section A as an example: when the movable bracket 4 slides to contact 2, contact 3 is connected to contact 2. Similarly, by sliding the sliding contact, contact 3 is connected to contact 4, contact 3 to contact 6, contact 6 to contact 5, and contact 6 to contact 7. Each phase is used in combination with section A and section B.

[0028] like Figure 1 and Figure 4 As shown: The conductive rod 3 includes a first conductor 31, an insulator 32, and a second conductor 33; the first conductor 31 and the second conductor 33 are respectively connected to two contact rods 21 at the end of each contact group 2, and an insulator 32 is connected between the first conductor 31 and the second conductor 33; with the above arrangement, the first conductive rod 31 and the second conductive rod 33 can be connected together with the contact rods 21 in each contact group 2 by matching the movable frame 4.

[0029] like Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown: Insulator 32 is located in the gap between the middle contact rod 21 and the left or right contact rod 21.

[0030] like Figure 4As shown: Two first protrusions 41 are symmetrically installed on one side of the interior of the movable frame 4, and the two first protrusions 41 are in contact with the conductive rod 3. Two second protrusions 42 are symmetrically installed on the other side of the interior of the movable frame 4, and the two second protrusions 42 are in contact with the contact rod 21. With the above arrangement, the movable frame 4 can connect the conductive rod 3 and the contact rod 21 together during the movement.

[0031] like Figure 1 and Figure 2 As shown: A knob 6 that drives the gear 7 to rotate is installed on the top of the mounting bracket 5.

[0032] Working principle: According to Figure 7 The working principle of the switch is explained in detail. When the switch is in the first position (maximum position), it is the same as the traditional solution. The coils of tap zone one and tap zone two are connected in series and run.

[0033] When the switch is in position two, coil 4-2 in the tap zone one coil of the traditional scheme is idle; this switch connects the idle tap zone one coil 4-2 in the traditional scheme with tap zone two coil 3-5 in parallel, thereby reducing the coil resistance and reducing the load loss of the transformer.

[0034] When the switch is in the third position (rated position), the 4-2 coil of tap zone one and the 3-5 coil of tap zone two in the traditional scheme are idle; this switch connects the 4-2 coil of tap zone one and the 3-5 coil of tap zone two in parallel, realizing the parallel operation of tap zone one and tap zone two, reducing transformer load loss.

[0035] When the switch is in position four, the 3-5 coils of tap zone one and tap zone two in the traditional scheme are idle; this switch connects the 6-4 coil of tap zone one to the 5-7 coil of tap zone two, thereby reducing the coil resistance and reducing the load loss of the transformer.

[0036] When the switch is in position 5 (lowest position), the coils of tap zone 1 and tap zone 2 are idle, just like in the traditional scheme.

[0037] While keeping the coil load loss constant, the coil cross-sectional area of ​​tap zone one and tap zone two can be reduced by 50%, thereby reducing the amount of copper used and lowering the manufacturing cost of the transformer.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tap changer that integrates idle coils in the transformer tap changer zone into operation, comprising two rods (1), characterized in that: Three sets of contact groups (2) are installed on each of the two rod bodies (1). A conductive rod (3) with central insulation is connected between the ends of each set of contact groups (2). Three movable frames (4) are slidably connected on each of the two rod bodies (1). The movable frames (4) are in contact with the conductive rod (3) and the contact group (2) respectively. A fixed frame (5) is installed between the two rods (1), and a gear (7) is rotatably connected to the fixed frame (5). A connecting rod (8) is provided above the two rods (1), and each connecting rod (8) is fixedly connected to three movable frames (4). A rack (9) is installed on the connecting rod (8), and the rack (9) meshes with the gear (7). Each contact group (2) includes seven contact rods (21), and the same-named ends inside each contact group (2) are internally connected; The conductive rod (3) includes a first conductor (31), an insulator (32), and a second conductor (33); The first conductor (31) and the second conductor (33) are respectively connected to the two contact rods (21) at the end of each contact group (2), and an insulator (32) is connected between the first conductor (31) and the second conductor (33).

2. A tap changer for merging idle coils in the transformer tap changer area into operation according to claim 1, characterized in that: The insulator (32) is located in the gap between the middle contact rod (21) and the left or right contact rod (21).

3. A tap changer for merging idle coils in the transformer tap changer area into operation, as described in claim 1, characterized in that: Two first protrusions (41) are symmetrically installed on one side of the interior of the movable frame (4), and the two first protrusions (41) are in contact with the conductive rod (3).

4. A tap changer for merging idle coils in the transformer tap changer area into operation, as described in claim 3, characterized in that: Two second protrusions (42) are symmetrically installed on the other side of the interior of the movable frame (4), and the two second protrusions (42) are in contact with the contact rod (21).

5. A tap changer for merging idle coils in the transformer tap changer area into operational operation, as described in claim 1, characterized in that: A knob (6) that drives the gear (7) to rotate is installed above the fixing frame (5).

Images