Dry-type iron core series reactor pulling plate

Abstract

The utility model relates to the technical field of reactors, in particular to a pull plate of a dry-type iron core series reactor. Comprising a pulling plate body, a pulling plate lower end connecting part, a pulling plate upper end connecting part and an iron core clamping piece, the pulling plate body and the pulling plate lower end connecting part are of an integrated structure, the top end of the pulling plate body is connected to the pulling plate upper end connecting part through an adjusting bolt, one end of the iron core clamping piece is fixedly connected with the pulling plate lower end connecting part, and the other end of the iron core clamping piece is fixedly connected with the pulling plate lower end connecting part. The other end of the iron core clamping piece is connected to the upper end of the pulling plate main body; the iron core clamping piece comprises an upper iron core clamping piece body and a lower iron core clamping piece body, and the upper iron core clamping piece body and the lower iron core clamping piece body are fixedly connected through a core penetrating bolt. The threaded lead screw at the upper end of the pulling plate body is connected with the iron core fastening channel steel in a fastened mode through the nut, so that the air gap adjustment of the iron core is more accurate, and the performance deviation of the electric reactor caused by air gap errors is avoided.

Description

Technical Field

[0001] This utility model relates to the field of reactor technology, and in particular to a pull plate for a dry-type iron-core series reactor. Background Technology

[0002] In existing technologies, dry-type iron-core series reactors are important reactive power compensation devices in power systems, used to limit short-circuit currents and suppress harmonics to improve power system stability and power quality. However, current dry-type iron-core series reactors often use ordinary steel for their tie plates, which have low tensile strength and toughness. Under long-term tensile stress, they are prone to fatigue fracture, reducing the reactor's reliability and service life. The tie plates are also heavy, increasing the overall weight of the reactor and hindering transportation and installation. Furthermore, the tie plates have poor heat dissipation performance; heat easily accumulates at the tie plates during reactor operation, affecting the reactor's heat dissipation and operational stability. The tie plates lack scales or markings related to air gap adjustment, forcing operators to rely on experience and repeated trials to achieve precise adjustments. This leads to inaccurate determination of the reactance rate, affecting the reactor's performance and compensation effect.

[0003] Furthermore, the lower end connection of the tie plate is usually connected to the lower clamping member using simple bolt or welding methods. Bolted connections are prone to loosening due to vibration and other factors during long-term operation, affecting the reliability of the connection. Welding is inconvenient for disassembly and maintenance, increasing maintenance costs and difficulty. The lack of effective positioning and sealing measures at the connection point makes it easy for the tie plate to be installed inaccurately, and for dust and moisture to enter the connection, corroding the connecting parts and further affecting the reliability of the connection and the performance of the reactor. The upper end connection of the tie plate often uses a single-threaded structure to connect to the fastening channel steel. The thread pitch is small, requiring many rotations to achieve the required displacement when adjusting the tightness of the tie plate to change the air gap, resulting in low adjustment efficiency and increased production and commissioning time. Currently, a dry-type iron-core series reactor tie plate is needed. Utility Model Content

[0004] To address the problems of excessive weight, unreliable lower-end connection, and low upper-end adjustment efficiency in pull plate structures and connection methods, this utility model provides a pull plate for a dry-type iron core series reactor.

[0005] In the first aspect, the present invention provides a dry-type iron-core series reactor pull plate, which adopts the following technical solution:

[0006] A dry-type iron-core series reactor tie plate, comprising:

[0007] The pull plate body, the lower end connecting component of the pull plate, the upper end connecting component of the pull plate, and the iron core clamp are provided. The pull plate body and the lower end connecting component of the pull plate adopt an integrated structure. The top end of the pull plate body is connected to the upper end connecting component of the pull plate by a pull plate fixing bolt. One end of the iron core clamp is fixedly connected to the lower end connecting component of the pull plate, and the other end of the iron core clamp is connected to the upper end of the pull plate body.

[0008] The core clamping component includes an upper core clamping component and a lower core clamping component. The upper core clamping component and the lower core clamping component are fixedly connected by a through bolt. The through bolt is located on the side of the core and is used to fix the core clamping component.

[0009] Furthermore, the upper part of the upper core clamp is provided with a plurality of evenly distributed lifting holes for lifting and transporting the reactor. The edge of the upper core clamp is provided with positioning pin holes, and the upper core clamp is connected to the upper end of the pull plate body through positioning pins.

[0010] Furthermore, the bottom of the lower core clamp is designed with a mounting base, and the surface of the mounting base is provided with multiple bolt holes for fixing and installing the reactor.

[0011] Furthermore, the mounting base is provided with anti-vibration pad mounting grooves around its perimeter, and rubber anti-vibration pads are installed in the anti-vibration pad mounting grooves to reduce the transmission of vibration during reactor operation.

[0012] Furthermore, the main body of the pull plate is made of high-strength alloy material, and multiple weight-reducing holes are evenly distributed along the length direction of the main body of the pull plate, and scale lines are provided on one side surface of the main body of the pull plate.

[0013] Furthermore, the lower end connecting component of the pull plate includes a stepped shaft pre-installed at the lower end of the pull plate body. The stepped shaft is fixed to the mounting hole at the bottom of the lower iron core clamp, and anti-loosening sealant is applied between the mating surfaces of the stepped shaft and the mounting hole.

[0014] Furthermore, the stepped shaft includes a positioning section and a connecting section. The connecting section is threaded and is fixedly connected to the lower iron core clamp by a locking nut for fixing the pull plate to the lower iron core clamp. The positioning section matches the inner diameter of the mounting hole in the lower iron core clamp.

[0015] Furthermore, the upper connecting component of the pull plate includes a fastening channel steel, through which the pull plate body passes, and multi-threaded part is provided at the part that passes through the fastening channel steel. The fastening channel steel is fixedly connected to the pull plate body through the multi-threaded part.

[0016] Furthermore, an adjusting nut and a fixing nut are installed on the multi-threaded plate. The adjusting nut is used to adjust the tightness of the pull plate, and the fixing nut is used to lock the adjusting nut.

[0017] Furthermore, the fastening channel steel is made of channel steel profile, and the opening of the fastening channel steel faces both sides of the pull plate body.

[0018] In summary, this utility model has the following beneficial technical effects:

[0019] 1. This utility model connects the upper iron core clamp to the upper end of the pull plate body via a positioning pin hole, and the lower iron core clamp is precisely positioned to the lower end of the pull plate via a stepped shaft. During assembly, operators can quickly find the relative positions of each component, reducing debugging time. The scale lines on the pull plate, combined with the adjustment function of the adjusting bolts, make the iron core air gap adjustment more precise, avoiding reactor performance deviations caused by air gap errors.

[0020] 2. The integrated structure of the pull plate body and the lower connecting component of this utility model, the high-strength alloy material, and the high-strength steel of the iron core clamp and the through bolt connection can effectively resist the electromagnetic force and mechanical stress during the operation of the reactor, eliminate the risk of loose connection, reduce the failure rate of the reactor, increase the continuous operation time of the equipment, and reduce the frequency of maintenance.

[0021] 3. The weight-reducing holes in the main body of the pull plate of this utility model reduce the overall weight of the reactor while promoting air circulation and increasing the heat dissipation area. This helps the reactor dissipate heat in a timely manner during operation, reduce the temperature of the iron core and windings, reduce problems such as insulation aging and performance degradation caused by overheating, and extend the service life of the equipment.

[0022] 4. The upper and lower end connection structure of the pull plate of this utility model is easy to disassemble. The lower end of the pull plate is connected by unscrewing the locking nut, and the upper end is connected by adjusting the nut and fixing the nut. This makes it convenient for operators to inspect, repair and replace parts inside the reactor, shorten maintenance time, reduce maintenance costs and improve equipment availability. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a dry-type iron core series reactor pull plate according to an embodiment of this utility model.

[0024] Figure 2 This is a left view of a pull plate of a dry-type iron-core series reactor according to an embodiment of the present utility model.

[0025] Figure 3 This is a top view of a dry-type iron-core series reactor pull plate according to an embodiment of this utility model.

[0026] Figure 4 This is a structural diagram of the pull plate body of a dry-type iron core series reactor pull plate according to an embodiment of this utility model.

[0027] Among them, 1. Fastening channel steel; 2. Lifting hole; 3. Fixing nut; 301. Pull plate fixing bolt; 4. Upper iron core clamp; 5. Through bolt; 6. Lower iron core clamp; 7. Stepped shaft; 8. Pull plate body; 801. Pull plate thread; 802. Welding surface; 9. Mounting base. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings.

[0029] Example 1

[0030] Reference Figure 1 The dry-type iron-core series reactor pull plate of this embodiment includes:

[0031] The pull plate body, the lower end connecting component of the pull plate, the upper end connecting component of the pull plate, and the iron core clamp are provided. The pull plate body and the lower end connecting component of the pull plate adopt an integrated structure. The top end of the pull plate body is connected to the upper end connecting component of the pull plate by adjusting bolts. One end of the iron core clamp is fixedly connected to the lower end connecting component of the pull plate, and the other end of the iron core clamp is connected to the upper end of the pull plate body.

[0032] The core clamping component includes an upper core clamping component 4 and a lower core clamping component. The upper core clamping component 4 and the lower core clamping component are fixedly connected by a through bolt 5, which passes through the core between the upper core clamping component 4 and the lower core clamping component.

[0033] Specifically,

[0034] like Figure 1 As shown, Figure 1As shown, firstly, the main body 8 of the pull plate is made of high-strength alloy material, possessing high tensile strength and toughness, capable of withstanding large tensile forces without deformation. The thickness and width of the pull plate are determined according to the reactor specifications and electromagnetic force calculations to ensure sufficient mechanical strength. Multiple weight-reducing holes are evenly distributed along the length of the pull plate main body 8. These holes effectively reduce the weight of the pull plate without affecting its strength, thus lowering the overall weight of the reactor and facilitating transportation and installation. Simultaneously, the weight-reducing holes also provide some heat dissipation, aiding in the reactor's heat dissipation. One side surface of the pull plate is machined with graduation lines, the accuracy of which reaches the millimeter level. These graduation lines are related to air gap adjustment. When the core air gap needs adjustment, the operator rotates the adjusting nut on the pull plate thread 801 at the upper end of the pull plate main body 8. Because the pull plate thread 801 is a multi-start thread with a large pitch, it can produce a large axial displacement under the same rotation angle. The movement of the adjusting nut causes the pull plate body 8 to move accordingly, thereby changing the size of the air gap in the iron core. The operator can precisely control the rotation of the adjusting nut according to the scale lines on the pull plate body 8 to achieve high-precision adjustment of the air gap. After the adjustment is completed, the fixing nut 3 is rotated to press the adjusting nut tightly. The friction between the two and the meshing force with the pull plate thread 801 are used to firmly lock the adjusting nut, preventing it from loosening due to vibration, electromagnetic force fluctuations and other factors during reactor operation, and ensuring that the air gap remains stable during operation.

[0035] like Figure 2 , Figure 3 , Figure 4 As shown, the through bolts 5 pass through the core laminations in sequence to fix the core clamps. Nuts are then installed and tightened. During tightening, the nuts exert pressure on the upper and lower core clamps 6, causing them to tightly hold the core. This connection method utilizes the tightening force of the bolts to firmly fix the core between the upper and lower core clamps 6, ensuring that the core will not experience relative displacement or loosening even under electromagnetic forces during reactor operation, thus maintaining the stability of the magnetic circuit. The diameter, length, and thread specifications of the through bolts 5 are designed based on the reactor's rated capacity and core size to ensure sufficient connection strength and stability. For example, for larger capacity reactors, larger diameter through bolts 5 may be selected to withstand greater electromagnetic forces.

[0036] The side bolts pass through the corresponding holes in the upper core clamp 4 and the lower core clamp 6 from the side. One end of the side bolt is screwed into the threaded hole on the side of the upper core clamp 4. The screwing depth is precisely calculated and designed to ensure the reliability of the connection without affecting the installation and operation of other components. The other end passes through the smooth hole on the side of the lower core clamp 6. The nut is not tightened at the moment. In the subsequent assembly process, it can be finely adjusted as needed to further adjust the relative position of the upper and lower core clamps 6 to ensure the installation accuracy of the core. The side bolts and the through bolts 5 cooperate with each other to fix the upper and lower core clamps 6 from different directions, which enhances the stability and deformation resistance of the entire core structure.

[0037] The stepped shaft 7 at the lower end of the pull plate body 8 is the key part of the entire connection. The stepped shaft 7 includes a positioning section and a connecting section. The outer diameter of the positioning section precisely matches the upper inner diameter of the mounting hole at the bottom of the lower iron core clamp 6. During installation, the stepped shaft 7 is aligned with the mounting hole of the lower iron core clamp 6 and slowly inserted. The positioning section enters the mounting hole first, and its tight fit with the hole wall achieves initial positioning of the pull plate body 8 in the horizontal and vertical directions, ensuring the accuracy of the pull plate installation position. The connecting section is threaded. After the stepped shaft 7 is fully inserted into the mounting hole, the lock nut is screwed into the thread of the connecting section from below the mounting hole at the bottom of the lower iron core clamp 6. During the tightening of the lock nut, the nut and the thread of the connecting section of the stepped shaft 7 gradually engage, and the resulting axial tensile force firmly fixes the pull plate body 8 to the lower iron core clamp 6. To further enhance the reliability of the connection and prevent loosening, an anti-loosening sealant is applied between the mating surfaces of the stepped shaft 7 and the mounting hole. This sealant fills the tiny gaps between the mating surfaces, increasing friction and making it more difficult for the stepped shaft 7 to detach from the mounting hole. Furthermore, the sealant also acts as a sealant, preventing dust, moisture, and other impurities from entering the connection area and affecting the internal electrical insulation performance. This connection method not only ensures a secure connection between the pull plate body 8 and the lower iron core clamp 6 but also considers long-term operational stability and reliability.

[0038] The main body 8 of the pull plate passes through the fastening channel steel 1. The fastening channel steel 1 is made of channel steel profile, and its opening faces both sides of the main body 8 of the pull plate. The part of the main body 8 of the pull plate that passes through the fastening channel steel 1 is machined with pull plate threads 801, which are engaged with pull plate fixing bolts 301. After the pull plate fixing bolts 301 pass through the corresponding holes in the fastening channel steel 1, they are screwed into the pull plate threads 801 to connect the fastening channel steel 1 and the main body 8 of the pull plate. The fastening channel steel 1 is fixed to the top of the upper iron core clamp 4 by other bolts, and has lifting holes 2 at both ends to connect the main body 8 of the pull plate to the upper iron core clamp 4. The connection between the pull plate body and the lower end connecting part of the pull plate is provided with a welding surface 802, which is used for fixed connection.

[0039] An adjusting nut and a fixing nut 3 are also installed on the pull plate thread 801. The internal thread of the adjusting nut is tightly engaged with the pull plate thread 801. When the core air gap needs to be adjusted, the operator rotates the adjusting nut. Because the pull plate thread 801 is a multi-start thread with a large pitch, the adjusting nut can produce a large axial displacement at the same rotation angle. The axial movement of the adjusting nut will drive the pull plate body 8 to move accordingly, thereby changing the size of the core air gap. The fixing nut 3 is installed close to the adjusting nut. After the core air gap is adjusted to a suitable size by adjusting the adjusting nut, the fixing nut 3 is rotated to press it against the adjusting nut. The friction between the fixing nut 3 and the adjusting nut, as well as the meshing force with the pull plate thread 801, can firmly lock the adjusting nut, preventing it from rotating or moving axially due to vibration, electromagnetic force fluctuations, or other factors during reactor operation, ensuring that the core air gap remains stable during operation.

[0040] The bottom of the lower core clamp 6 is designed with a mounting base 9, on which multiple bolt holes are evenly distributed. When installing the reactor, the mounting base 9 is placed on the predetermined mounting foundation, aligning the bolt holes with the corresponding holes on the foundation. Then, high-strength bolts are passed through the bolt holes and screwed into the threaded holes of the mounting foundation, tightened in multiple stages according to the specified torque. This connection method firmly fixes the entire reactor to the mounting foundation, preventing displacement or shaking during operation due to vibration, external forces, or other factors.

[0041] The mounting base 9 is equipped with anti-vibration pad mounting grooves around its perimeter. The anti-vibration pads are generally made of elastic materials such as rubber or silicone, and their shape and size match the mounting grooves. During installation, the anti-vibration pads are embedded into the mounting grooves, ensuring a tight fit without gaps, wrinkles, or other defects. When the reactor vibrates during operation, the vibration energy is transmitted to the mounting base. The anti-vibration pads absorb this energy through their elastic deformation and dissipate it as heat or other forms of energy. This effectively reduces the transmission of vibration to the mounting foundation and surrounding environment, lowers noise, protects the reactor's internal precision components from long-term vibration damage, and extends the equipment's service life.

[0042] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A tie plate for a dry-type iron-core series reactor, characterized in that, include: The pull plate body, the lower end connecting component of the pull plate, the upper end connecting component of the pull plate, and the iron core clamp are provided. The pull plate body and the lower end connecting component of the pull plate adopt an integrated structure. The top end of the pull plate body is connected to the upper end connecting component of the pull plate by a pull plate fixing bolt. One end of the iron core clamp is fixedly connected to the lower end connecting component of the pull plate, and the other end of the iron core clamp is connected to the upper end of the pull plate body. The core clamping component includes an upper core clamping component and a lower core clamping component. The upper core clamping component and the lower core clamping component are fixedly connected by a through bolt. The through bolt is located on the side of the core and is used to fix the core clamping component.

2. The pull plate of a dry-type iron-core series reactor according to claim 1, characterized in that, The upper iron core clamp has multiple evenly distributed lifting holes on its upper part for lifting and transporting the reactor. The upper iron core clamp has positioning pin holes on its edge, and the upper iron core clamp is connected to the upper end of the pull plate body through positioning pins.

3. The pull plate of a dry-type iron-core series reactor according to claim 1, characterized in that, The bottom of the lower core clamp is designed with a mounting base, and the surface of the mounting base is provided with multiple bolt holes for fixing and installing the reactor.

4. The pull plate of a dry-type iron-core series reactor according to claim 3, characterized in that, The mounting base is also provided with anti-vibration pad mounting grooves around its perimeter. Rubber anti-vibration pads are installed in the anti-vibration pad mounting grooves to reduce the transmission of vibration during reactor operation.

5. A pull plate for a dry-type iron-core series reactor according to claim 1, characterized in that, The main body of the pull plate is made of high-strength alloy material. Multiple weight-reducing holes are evenly distributed along the length of the main body of the pull plate, and scale lines are provided on one side surface of the main body of the pull plate.

6. A pull plate for a dry-type iron-core series reactor according to claim 5, characterized in that, The lower end connecting component of the pull plate includes a stepped shaft pre-installed at the lower end of the pull plate body. The stepped shaft is fixed to the mounting hole at the bottom of the lower iron core clamp. Anti-loosening sealant is applied between the mating surfaces of the stepped shaft and the mounting hole.

7. A pull plate for a dry-type iron-core series reactor according to claim 6, characterized in that, The stepped shaft includes a positioning section and a connecting section. The connecting section is threaded and is fixedly connected to the lower iron core clamp by a locking nut for fixing the pull plate to the lower iron core clamp. The positioning section matches the inner diameter of the mounting hole in the lower iron core clamp.

8. A pull plate for a dry-type iron-core series reactor according to claim 1, characterized in that, The upper connecting component of the pull plate includes a fastening channel steel. The pull plate body passes through the fastening channel steel and has multi-threaded sections at the part that extends out of the fastening channel steel. The fastening channel steel is fixedly connected to the pull plate body through the multi-threaded sections.

9. A pull plate for a dry-type iron-core series reactor according to claim 8, characterized in that, An adjusting nut and a fixing nut are installed on the multi-threaded plate. The adjusting nut is used to adjust the tightness of the pull plate, and the fixing nut is used to lock the adjusting nut.

10. A pull plate for a dry-type iron-core series reactor according to claim 9, characterized in that, The fastening channel steel is made of channel steel profile, and the opening of the fastening channel steel faces both sides of the pull plate body.

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