Built-in current transformer frame type fixing structure
Through the design of the frame-type fixed structure and the insulating angle ring, the problem of tight space and difficult to take into account when the built-in current transformer is installed inside the transformer, achieving the effect of stable fixation and reliable insulation.
Patent Information
- Application Number
- CN202420399553.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-01
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-03-01
AI Technical Summary
When installing a built-in current transformer inside the transformer, the space is tight and it is difficult to take into account the requirements of both the installation space and the insulation distance.
The frame-type fixing structure is adopted, including a lower support plate, an upper support plate and a built-in current transformer body, and the fastening connection is achieved through an insulating angle ring and a metal screw, and the insulation performance is ensured through the first and second fixing components.
It realizes the stable fixation of the built-in current transformer, makes full use of the internal space of the fuel tank, and ensures reliable insulation performance between the leads and the transformer.
Smart Images
Figure CN222636985U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of built-in current transformers, in particular to a frame-type fixing structure of a built-in current transformer. Background Art
[0002] In order to prevent the transformer from overload, short circuit and other phenomena, the transformer needs to be used in conjunction with protection equipment, and the current transformer can convert the large current in the transformer winding into a small current provided to the measurement and protection equipment. In general, the current transformer is sleeved at the end of the bushing and installed in the external elevation seat of the oil tank. This structure is convenient for the operator to install and can also meet the insulation requirements of the lead wire. However, when there are special requirements for measurement or protection or the external structure cannot meet them, the current transformer must be placed inside the oil tank and become a built-in current transformer. Due to the complex structure of the internal lead wire of the transformer, the space for placing the built-in current transformer is relatively tight. Taking into account the installation space of the built-in current transformer and ensuring the insulation distance between the transformer and the lead wire has become a technical key point.
[0003] Therefore, it is necessary to propose a built-in current transformer frame-type fixed structure to solve the above problems. Utility Model Content
[0004] The purpose of the utility model is to provide a frame-type fixing structure of a built-in current transformer to solve the problems raised in the above background technology.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a built-in current transformer frame-type fixing structure, comprising a lower support plate, an upper support plate and a built-in current transformer body, the upper support plate is located above the lower support plate, the built-in current transformer body abuts against the upper surface of the lower support plate, an insulating angle ring is inserted into the interior of the built-in current transformer body, the upper support plate abuts against the top of the insulating angle ring, the lower support plate and the upper support plate are fastened to each other by metal screws, a first fixing component is provided on one side between the lower support plate and the upper support plate, and a second fixing component is provided on the other side between the lower support plate and the upper support plate.
[0006] Preferably, the first fixing assembly includes a first lower wire clamp, a first upper wire clamp and a first vertical bar, the first lower wire clamp is fixedly connected to one end of the bottom of the lower support plate by bolts, the first upper wire clamp is fixedly connected to one end of the top of the upper support plate by bolts, the first upper wire clamp and the first lower wire clamp are correspondingly distributed up and down, and the first vertical bar is fixedly connected between the first upper wire clamp and the first lower wire clamp.
[0007] Preferably, the second fixing assembly includes a second lower wire clamp, a second upper wire clamp and a second vertical bar, the second lower wire clamp is fixedly connected to the other end of the bottom of the lower support plate by bolts, the second upper wire clamp is fixedly connected to the other end of the top of the upper support plate by bolts, the second lower wire clamp and the second upper wire clamp are correspondingly distributed up and down, and the second vertical bar is fixedly connected between the second lower wire clamp and the second upper wire clamp.
[0008] Preferably, the first lower wire clamp and the second lower wire clamp are both in the shape of a knife handle.
[0009] Preferably, a winding lead is passed through the insulating angle ring, and the winding lead includes a lead body and a protective sleeve, and the protective sleeve is sleeved on the outside of the lead body.
[0010] Preferably, the upper half of the second vertical bar is fixedly connected to the first wire rod by bolts, the first wire rod is fixedly connected to the first clamping plate by bolts, and the top end of the winding lead is clamped and fixed between the first wire rod and the first clamping plate.
[0011] Preferably, the lower half of the second vertical bar is fixedly connected to the second wire rod by bolts, the second wire rod is fixedly connected to the second clamping plate by bolts, and the bottom end of the winding lead is clamped and fixed between the second wire rod and the second clamping plate.
[0012] Technical effects and advantages of the utility model:
[0013] 1. The utility model adopts a lifting method to fix the built-in current transformer body by arranging the first vertical bar, the second vertical bar and other structures, which not only makes full use of the internal space of the oil tank, but also does not affect the assembly of the lead body; the built-in current transformer body is installed with an insulating angle ring, and the lead body is wrapped with corrugated cardboard and insulating cardboard and fixed separately, so that reliable insulation performance can be guaranteed between the lead body and the built-in current transformer body. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a schematic diagram of the installation of the fixed built-in current transformer part of the utility model.
[0015] Figure 2 This is a schematic diagram of the installation and decomposition of the fixed built-in current transformer part of the utility model.
[0016] Figure 3 This is a cross-sectional view of the part of the utility model that fixes the built-in current transformer.
[0017] Figure 4 This is a schematic diagram of the frame-type fixed structure of the built-in current transformer of the utility model.
[0018] In the figure: 1. lower support plate; 2. upper support plate; 3. built-in current transformer body; 4. insulating angle ring; 5. metal screw; 6. first vertical bar; 7. second vertical bar; 8. first lower wire clamp; 9. second lower wire clamp; 10. first upper wire clamp; 11. second upper wire clamp; 12. lead body; 13. protective cover; 14. first wire rod; 15. first clamping plate; 16. second wire rod; 17. second clamping plate. DETAILED DESCRIPTION
[0019] 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.
[0020] The utility model provides Figure 1-Figure 4 A frame-type fixed structure of a built-in current transformer is shown, comprising a lower support plate 1, an upper support plate 2 and a built-in current transformer body 3, wherein the upper support plate 2 is located above the lower support plate 1, the built-in current transformer body 3 abuts against the upper surface of the lower support plate 1, the insulating angle ring 4 is inserted into the interior of the built-in current transformer body 3, and the upper support plate 2 abuts against the top of the insulating angle ring 4. The lower support plate 1 and the upper support plate 2 are fastened and connected by metal screws 5, and four metal screws 5 are provided during specific use to improve the stability of the overall structure.
[0021] The insulating angle ring 4 is provided with a winding lead wire, and the winding lead wire includes a lead wire body 12 and a protective sleeve 13. The protective sleeve 13 is sleeved on the outside of the lead wire body 12, and the protective sleeve 13 includes a corrugated cardboard and an insulating cardboard. The insulating angle ring 4 is inserted into the built-in current transformer body 3 to ensure the insulation performance of the winding lead wire passing through the center and the built-in current transformer body 3;
[0022] At the same time, the utility model replaces the phenolic paper tube with an insulating angle ring 4, so that a part of the insulating angle ring 4 is located between the upper support plate 2 and the built-in current transformer body 3, which plays a role in fixing the insulating part and is convenient for the operator to install.
[0023] A first fixing assembly is disposed on one side between the lower support plate 1 and the upper support plate 2, and a second fixing assembly is disposed on the other side between the lower support plate 1 and the upper support plate 2;
[0024] In the specific configuration, the first fixing assembly includes a first lower wire clamp 8, a first upper wire clamp 10 and a first vertical bar 6. The first lower wire clamp 8 is fixedly connected to one end of the bottom of the lower support plate 1 by bolts, and the first upper wire clamp 10 is fixedly connected to one end of the top of the upper support plate 2 by bolts. The first upper wire clamp 10 and the first lower wire clamp 8 are correspondingly distributed up and down, and the first vertical bar 6 is fixedly connected between the first upper wire clamp 10 and the first lower wire clamp 8.
[0025] In the specific configuration, the second fixing assembly includes a second lower wire clamp 9, a second upper wire clamp 11 and a second vertical bar 7. The second lower wire clamp 9 is fixedly connected to the other end of the bottom of the lower support plate 1 by bolts, and the second upper wire clamp 11 is fixedly connected to the other end of the top of the upper support plate 2 by bolts. The second lower wire clamp 9 and the second upper wire clamp 11 are correspondingly distributed up and down, and the second vertical bar 7 is fixedly connected between the second lower wire clamp 9 and the second upper wire clamp 11.
[0026] The first lower wire clamp 8 and the second lower wire clamp 9 are both in the shape of a knife handle, and the knife handle-shaped structure can ensure better supporting strength.
[0027] The upper half of the second vertical bar 7 is fixedly connected to the first wire rod 14 by bolts, the first wire rod 14 is fixedly connected to the first clamping plate 15 by bolts, and the top end of the winding lead is clamped and fixed between the first wire rod 14 and the first clamping plate 15; the lower half of the second vertical bar 7 is fixedly connected to the second wire rod 16 by bolts, the second wire rod 16 is fixedly connected to the second clamping plate 17 by bolts, and the bottom end of the winding lead is clamped and fixed between the second wire rod 16 and the second clamping plate 17. The first wire rod 14 and the first clamping plate 15 are provided to clamp and fix the top end of the winding lead; the second wire rod 16 and the second clamping plate 17 are provided to clamp and fix the bottom end of the winding lead, so as to complete the positioning of the winding lead and ensure the insulation distance between the lead body 12 and the built-in current transformer.
[0028] The specific installation method is as follows: first, place the lower support plate 1 on a horizontal plane, place the built-in current transformer body 3 horizontally on the lower support plate 1, then place the insulating angle ring 4 from top to bottom in the built-in current transformer body 3, place the upper support plate 2 on the top of the insulating angle ring 4, and fix the insulating angle ring 4 between the built-in current transformer body 3 and the upper support plate 2 to ensure the insulation performance of the winding lead passing through the center of the built-in current transformer body 3 and the built-in current transformer body 3;
[0029] Four metal screws 5 are installed between the lower support plate 1 and the upper support plate 2 and tightened so that the lower support plate 1 and the upper support plate 2 clamp the built-in current transformer body 3 into a whole;
[0030] The first lower wire clamp 8 is fixed to the first vertical bar 6 with bolts, and the second lower wire clamp 9 is fixed to the second vertical bar 7 with bolts, so that the first lower wire clamp 8 and the second lower wire clamp 9 are at the same horizontal height to form a stable bracket; the assembled built-in current transformer body 3 is horizontally placed on the first lower wire clamp 8 and the second lower wire clamp 9, and the lower support plate 1 is fastened to the first lower wire clamp 8 and the second lower wire clamp 9 with bolts;
[0031] The first upper wire clamp 10 is fixed to the first vertical bar 6 with bolts, and the second upper wire clamp 11 is fixed to the second vertical bar 7 with bolts, so that the first upper wire clamp 10 and the second upper wire clamp 11 are at the same horizontal height, and then the first upper wire clamp 10 and the second upper wire clamp 11 are respectively installed at the two ends of the top of the upper support plate 2 by bolts to play a lifting role;
[0032] The winding lead passes through the center of the built-in current transformer body 3, the lead body 12 is wrapped with a protective sleeve 13, and is individually fixed above and below the built-in current transformer body 3 through structures such as a first wire rod 14, a first clamping plate 15, a second wire rod 16, and a second clamping plate 17, which not only improves the electric field strength distribution between the lead body 12 and the built-in current transformer body 3, but also ensures the creepage distance between the lead body 12 and the built-in current transformer body 3.
[0033] The built-in current transformer body 3 is fixed by lifting, which fully utilizes the internal space of the oil tank and does not affect the assembly of the lead body 12. The built-in current transformer body 3 is installed with the insulating angle ring 4, and the lead body 12 is wrapped with corrugated cardboard and insulating cardboard and fixed separately, so that reliable insulation performance can be guaranteed between the lead body 12 and the built-in current transformer body 3.
Claims
1. A frame-type fixed structure of a built-in current transformer, comprising a lower support plate (1), an upper support plate (2) and a built-in current transformer body (3), characterized in that: The upper support plate (2) is located above the lower support plate (1), the built-in current transformer body (3) is in contact with the upper surface of the lower support plate (1), an insulating angle ring (4) is inserted into the interior of the built-in current transformer body (3), the upper support plate (2) is in contact with the top of the insulating angle ring (4), the lower support plate (1) and the upper support plate (2) are fastened together by a metal screw (5), a first fixing component is provided on one side between the lower support plate (1) and the upper support plate (2), and a second fixing component is provided on the other side between the lower support plate (1) and the upper support plate (2).
2. The frame-type fixed structure of a built-in current transformer according to claim 1, characterized in that: The first fixing assembly comprises a first lower wire clamp (8), a first upper wire clamp (10) and a first vertical bar (6); the first lower wire clamp (8) is fixedly connected to one end of the bottom of the lower support plate (1) by bolts; the first upper wire clamp (10) is fixedly connected to one end of the top of the upper support plate (2) by bolts; the first upper wire clamp (10) and the first lower wire clamp (8) are correspondingly distributed up and down; and the first vertical bar (6) is fixedly connected between the first upper wire clamp (10) and the first lower wire clamp (8).
3. The frame-type fixed structure of a built-in current transformer according to claim 2, characterized in that: The second fixing assembly comprises a second lower wire clamp (9), a second upper wire clamp (11) and a second vertical bar (7); the second lower wire clamp (9) is fixedly connected to the other end of the bottom of the lower support plate (1) by bolts; the second upper wire clamp (11) is fixedly connected to the other end of the top of the upper support plate (2) by bolts; the second lower wire clamp (9) and the second upper wire clamp (11) are correspondingly distributed up and down; and the second vertical bar (7) is fixedly connected between the second lower wire clamp (9) and the second upper wire clamp (11).
4. The frame-type fixed structure of a built-in current transformer according to claim 3, characterized in that: The first lower wire clamp (8) and the second lower wire clamp (9) are both in the shape of knife handles.
5. The frame-type fixed structure of a built-in current transformer according to claim 4, characterized in that: A winding lead is passed through the insulating angle ring (4), and the winding lead comprises a lead body (12) and a protective sleeve (13), wherein the protective sleeve (13) is sleeved on the outside of the lead body (12).
6. The frame-type fixed structure of a built-in current transformer according to claim 5, characterized in that: The upper half of the second vertical bar (7) is fixedly connected to the first wire rod (14) by bolts, the first wire rod (14) is fixedly connected to the first clamping plate (15) by bolts, and the top end of the winding lead is clamped and fixed between the first wire rod (14) and the first clamping plate (15).
7. The frame-type fixed structure of a built-in current transformer according to claim 6, characterized in that: The lower half of the second vertical bar (7) is fixedly connected to a second wire rod (16) by means of bolts, and a second clamping plate (17) is fixedly connected to the second wire rod (16) by means of bolts, and the bottom end of the winding lead is clamped and fixed between the second wire rod (16) and the second clamping plate (17).