A C-type iron core fixing device for voltage transformer

Abstract

The invention discloses a C-type iron core fixing device for a voltage transformer, comprising a voltage coil, a C-type iron core a, a C-type iron core b, a bracket, a throat clamp, a positioning plate, a clamp, and a positioning platform; the end face of the C-type iron core a is butted with the end face of the C-type iron core b, the voltage coil is sleeved on one side of the C-type iron core a and the C-type iron core b, the bracket is closely attached to the other side of the C-type iron core a and the C-type iron core b, legs are arranged on both sides of the bracket, the legs are fixed on the positioning plate by positioning pins, the positioning plate, the C-type iron core a and the clamp are all installed on the positioning platform, the clamp is used to clamp the C-type iron core a for lateral positioning, the throat clamp passes through the voltage coil and is sleeved on the outer wall of the C-type iron core a and the C-type iron core b. The device has a simple structure, a short production cycle, and high production efficiency, and can effectively ensure that the C-type iron core and the bracket are accurately positioned and firmly fixed, so that the reliability of the insulation and excitation characteristics of the voltage transformer is greatly improved.

Description

Technical Field

[0001] The invention relates to the field of voltage transformer manufacturing, in particular to a voltage transformer C-shaped iron core fixing device. Background Art

[0002] At present, when assembling the core of the voltage transformer, steel strips and buckles are usually used to splice the C-type core together, and then argon arc welding is used after the bracket is fastened to prevent the end face of the C-type core from loosening or dislocating during the epoxy resin pouring process of the transformer, affecting the excitation characteristics of the core. However, due to the use of buckles for fixing, tightening the buckles is sometimes limited by objective conditions and can only ensure that the end faces of the core are attached together, and the tightness is difficult to control. Therefore, the contacting end faces of the two cores will inevitably become loose or dislocated, which directly affects the excitation characteristics of the voltage transformer, and the bracket position is easy to be biased, affecting the insulation distance, and even causing the product to be scrapped. Summary of the invention

[0003] To solve the above problems, the purpose of the present invention is to provide a core fixing device that prevents the C-type core end face from being misaligned during the epoxy resin pouring process of the transformer, affecting the excitation characteristics of the voltage transformer and preventing the bracket from being easily misaligned.

[0004] To achieve the above-mentioned purpose, the technical solution of the present application is: a voltage transformer C-core fixing device, including a voltage coil, a C-core a, a C-core b, a bracket, a throat clamp, a positioning plate, a clamp, and a positioning platform; the end face of the C-core a is butted against the end face of the C-core b, the voltage coil is sleeved on one side of the C-core a and the C-core b, and a bracket is tightly attached to the other side of the C-core a and the C-core b, and legs are provided on both sides of the bracket, and the legs are fixed on the positioning plate by positioning pins, the positioning plate, the C-core a and the clamp are all installed on the positioning platform, the clamp is used to clamp the C-core a for lateral positioning, and the throat clamp passes through the voltage coil and is sleeved on the outer walls of the C-core a and the C-core b.

[0005] Furthermore, the throat clamp is made of stainless steel and includes a fastening screw, a steel belt, and a guide frame. The guide frame is fixedly connected to the steel belt, and a section of oblique stripe groove is provided on the steel belt. The fastening screw is inserted into the guide frame to fasten the steel belt to the center position of the outer wall of the C-type iron core a and the C-type iron core b. One end of the steel belt with the oblique stripe groove passes through the guide frame, and the thread on the fastening screw is screwed into the corresponding oblique stripe groove.

[0006] Furthermore, a positioning groove is opened on the positioning platform, and the steel belt at the bottom of the C-shaped iron core a is located in the positioning groove, and the steel belt is locked laterally.

[0007] Furthermore, the end of the fastening screw is a hexagonal screw head, a pneumatic wrench is used to tighten the fastening screw, and a torque wrench is used to calibrate the torque.

[0008] Furthermore, the clamp is an electric clamp or a pneumatic clamp, and a rubber pad is provided at the clamping position of the clamp and the iron core to avoid damaging the iron core.

[0009] Furthermore, the bracket is located between the outer wall of the C-type iron core a, the C-type iron core b and the steel belt of the throat clamp.

[0010] Furthermore, a paper pad is provided between the voltage coil and the C-type iron core a and C-type iron core b to prevent relative sliding and rotation between the coil and the iron core.

[0011] Furthermore, supporting legs are provided on both sides of the upper part and the lower part of the bracket, and the supporting legs are fixed on the positioning plate by positioning pins.

[0012] Furthermore, the fastening screw and the guide frame are located at the arc of the C-shaped iron core b.

[0013] By adopting the above technical scheme, the present invention can achieve the following technical effects: the device has a simple structure, a short production cycle and high production efficiency; a groove for positioning the steel belt in the throat clamp is arranged in the middle of the positioning table, a positioning plate for fixing the bracket is arranged on the side, and electric or pneumatic clamps are used to fix the iron core at the front and back to make the operation safe and reliable; the two C-shaped iron cores and the bracket are fixed and tightened by tightening screws in conjunction with the oblique striped grooves on the steel belt and then the torque is corrected by a torque wrench, which can effectively ensure that the C-shaped iron core and the bracket are accurately positioned and firmly fixed, thereby greatly improving the reliability of the insulation and excitation characteristics of the voltage transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention has attached Figure 4 Size:

[0015] Figure 1 It is a partial structural schematic diagram of the device;

[0016] Figure 2 is a side partial dislocated view of the device;

[0017] Figure 3 It is a structural schematic diagram of the device;

[0018] Figure 4 It is a schematic diagram of the support structure of the device;

[0019] Explanation of the serial numbers in the figure: 1. voltage coil, 2. C-type iron core b, 3. bracket, 4. throat clamp, 5. fastening screw, 6. steel belt, 7. oblique stripe groove, 8. guide frame, 9. positioning plate, 10. clamp, 11. positioning groove, 12. positioning table, 13. positioning pin. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: this example is used to further describe the present application.

[0021] Example 1

[0022] like Figure 1-4 As shown, this embodiment provides a C-type core fixing device for a voltage transformer, including a voltage coil, a C-type core a, a C-type core b, a bracket, a throat clamp, a positioning plate, a clamp, and a positioning platform; the end face of the C-type core a is butted against the end face of the C-type core b, the voltage coil is sleeved on one side of the C-type core a and the C-type core b, and a bracket is tightly attached to the other side of the C-type core a and the C-type core b, and legs are provided on both sides of the bracket, and the legs are fixed on the positioning plate by positioning pins, the positioning plate, the C-type core a and the clamp are all installed on the positioning platform, the clamp is used to clamp the C-type core a for lateral positioning, the throat clamp passes through the voltage coil and is sleeved on the outer walls of the C-type core a and the C-type core b, a positioning groove is opened on the positioning platform, and the steel belt at the bottom of the C-type core a is located in the positioning groove, and the steel belt is locked laterally.

[0023] Preferably, the throat clamp is made of stainless steel and includes a fastening screw, a steel belt, and a guide frame. The guide frame is fixedly connected to the steel belt, and a section of oblique stripe groove is provided on the steel belt. The fastening screw is inserted into the guide frame to fasten the steel belt to the center position of the outer wall of the C-type iron core a and the C-type iron core b. The end of the steel belt with the oblique stripe groove passes through the guide frame, and the thread on the fastening screw is screwed into the corresponding oblique stripe groove; the end of the fastening screw is a flat hexagonal screw head, and a pneumatic wrench is used to tighten the fastening screw, and a torque wrench is used to correct the torque.

[0024] Preferably, the clamp is an electric clamp or a pneumatic clamp, and a rubber pad is provided between the clamp and the iron core clamping portion to avoid damaging the iron core.

[0025] The assembly process of the above-mentioned fixture is as follows:

[0026] Step 1: Put the voltage coil onto one side of the C-type iron core a. After the steel belt in the throat clamp passes through the voltage coil and surrounds the C-type iron core a, place the C-type iron core a on the positioning table. At this time, the steel belt is located in the positioning groove;

[0027] Step 2: Use an electric or pneumatic clamp to clamp the lower part of the C-type iron core a, and place the C-type iron core b on the C-type iron core a. At this time, one side of the C-type iron core b is located in the voltage coil;

[0028] Step 3: Install the bracket close to the other side of the C-type core a and the C-type core b. Pass the positioning pin through the hole on the bracket leg to fix it to the positioning plate. The positioning plate can be replaced according to the different hole spacings of the bracket.

[0029] Step 4: Adjust the steel belt so that it covers the middle of the outer periphery of C-type iron core a, C-type iron core b and the bracket. The end of the steel belt with the oblique stripe groove passes through the guide frame. Use a pneumatic wrench to rotate the fastening screw, and then use a torque wrench to correct the torque value.

[0030] In this embodiment, the C-type iron core a and the C-type iron core b are of a large and a small structure, or they can be of the same size. Figure 1 and Figure 3 The CC in the figure is the connection between the two cores.

[0031] The device has a simple structure. The core periphery is fixed with a throat clamp and the degree of tightening is controlled by a torque wrench to ensure that the core end face will not loosen or misalign during the epoxy resin pouring process. The bracket is positioned with a positioning plate to ensure uniform insulation distance during the subsequent mold installation process.

[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An assembly method for a voltage transformer C-type core fixing device, characterized in that: include Step 1: Put the voltage coil onto one side of the C-type iron core a. After the steel belt in the throat clamp passes through the voltage coil and surrounds the C-type iron core a, place the C-type iron core a on the positioning table. At this time, the steel belt is located in the positioning groove; Step 2: Use an electric or pneumatic clamp to clamp the lower part of the C-type iron core a, and place the C-type iron core b on the C-type iron core a. At this time, one side of the C-type iron core b is located in the voltage coil; Step 3: Install the bracket close to the other side of the C-type core a and the C-type core b. Pass the positioning pin through the hole on the bracket leg to fix it to the positioning plate. The positioning plate can be replaced according to the different hole spacings of the bracket. Step 4: Adjust the steel belt so that it covers the middle of the outer periphery of the C-type iron core a, C-type iron core b and the bracket. The end of the steel belt with the oblique stripe groove passes through the guide frame. Use a pneumatic wrench to rotate the fastening screw, and then use a torque wrench to calibrate the torque value; The voltage transformer C-core fixing device comprises a voltage coil, a C-core a, a C-core b, a bracket, a throat clamp, a positioning plate, a clamp, and a positioning platform; the end face of the C-core a is butted against the end face of the C-core b, the voltage coil is sleeved on one side of the C-core a and the C-core b, a bracket is tightly attached to the other side of the C-core a and the C-core b, legs are arranged on both sides of the bracket, the legs are fixed on the positioning plate by positioning pins, the positioning plate, the C-core a and the clamp are all mounted on the positioning platform, the clamp is used to clamp the C-core a for lateral positioning, the throat clamp passes through the voltage coil and is sleeved on the outer walls of the C-core a and the C-core b; The throat clamp is made of stainless steel and includes a fastening screw, a steel belt, and a guide frame. The guide frame is fixedly connected to the steel belt, and a section of oblique stripe groove is provided on the steel belt. The fastening screw is inserted into the guide frame to fasten the steel belt to the center position of the outer wall of the C-type iron core a and the C-type iron core b. The thread on the fastening screw is screwed into the corresponding oblique stripe groove.

2. The method for assembling a voltage transformer C-core fixing device according to claim 1, characterized in that: A positioning groove is provided on the positioning table, and the steel belt at the bottom of the C-shaped iron core a is located in the positioning groove, and the steel belt is locked laterally.

3. The assembly method of a voltage transformer C-core fixing device according to claim 1, characterized in that: The end of the fastening screw is a hexagonal screw head. A pneumatic wrench is used to tighten the fastening screw, and a torque wrench is used to calibrate the torque.

4. The method for assembling a voltage transformer C-core fixing device according to claim 1, characterized in that: The clamp is an electric clamp or a pneumatic clamp, and a rubber pad is provided at the clamping position between the clamp and the iron core.

5. The method for assembling a voltage transformer C-core fixing device according to claim 2, characterized in that: The bracket is located between the outer wall of the C-type iron core a, the C-type iron core b and the steel belt of the throat hoop.

6. The method for assembling a voltage transformer C-core fixing device according to claim 1, characterized in that: A paper pad is provided between the voltage coil and the C-type iron core a and the C-type iron core b.

7. The method for assembling a voltage transformer C-core fixing device according to claim 1, characterized in that: Support legs are arranged on both sides of the upper part and the lower part of the bracket, and the support legs are fixed on the positioning plate through positioning pins.

8. The method for assembling a voltage transformer C-core fixing device according to claim 2, characterized in that: The fastening screw and the guide frame are located at the arc of the C-shaped iron core b.

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