A current transformer insulation ring press-fitting device

Abstract

The application relates to the technical field of gas-insulated metal-enclosed switch, in particular to a current transformer insulation ring pressing device. The device comprises a base for supporting the current transformer, a support rod fixedly arranged on the base and extending in the up-down direction, the support rod is used for penetrating through the support cylinder of the current transformer and is coaxially arranged with the support cylinder of the current transformer, the support rod comprises an extension section used for extending out of the support cylinder of the current transformer, a rotating piece is threadedly connected to the extension section, a pressing plate is arranged below the rotating piece, the rotating piece is used for moving downward while rotating and pressing the pressing plate to press the insulation ring into the gap between the sealing ring on the upper flange plate of the current transformer and the sealing ring on the support cylinder of the current transformer, so that the pressing plate does not relatively move with the top surface of the insulation ring when the insulation ring is pressed, damage of the insulation ring is avoided, the insulation ring is always uniformly stressed, and the sealing effect is not deteriorated due to the distortion of the sealing ring.

Description

Technical Field

[0001] This invention relates to the field of gas-insulated metal-enclosed switch technology, and more specifically to a current transformer insulation ring press-fitting device. Background Technology

[0002] With the continuous development of science and technology in my country's power industry, SF6 gas-insulated metal-enclosed switchgear (GIS) has been widely used in the installation of substations at various voltage levels, and current transformers are an important component of GIS equipment.

[0003] One type of current transformer in the prior art is as follows: Figure 1 , 2 As shown, the current transformer 13 includes an upper flange 131, a lower flange 132, and a support cylinder 133. The inner cavity of the support cylinder 133 is used for the conductive rod to pass through, and the outer circumferential surface of the support cylinder 133 is used to fit the transformer coil. The lower end of the support cylinder 133 is directly fixed to the corresponding flange hole of the lower flange 132. The upper end of the support cylinder 133 passes through the flange hole of the upper flange 131. An axial sealing structure for gas sealing is provided between the upper end of the support cylinder 133 and the upper flange 131. The axial sealing structure includes sealing rings 134 respectively fitted on the inner wall of the flange hole of the upper flange 131 and the outer circumferential surface of the support cylinder 133. An insulating ring 135 is press-fitted in the gap between the sealing ring 134 on the support cylinder and the sealing ring 134 on the upper flange. A pressure plate 136 for pressing the insulating ring 135 is fixedly installed at the upper end of the upper flange 131.

[0004] In the existing technology, when pressing the insulating ring into the gap between the sealing ring on the support cylinder and the sealing ring on the upper flange, since there is no suitable pressing device, the insulating ring is usually assembled by directly forcibly pushing it into the gap. This is time-consuming and labor-intensive, and the insulating ring is easily damaged during the forced pressing process. At the same time, forced pressing cannot ensure that the overall pressing position of the insulating ring is consistent, resulting in uneven stress on the insulating ring. This can easily lead to deformation of the sealing ring and uneven stress on some pressed parts, causing air leakage. The overall sealing effect is poor, which seriously affects the assembly quality of the current transformer. Summary of the Invention

[0005] The purpose of this invention is to provide a current transformer insulation ring pressing device to solve the technical problems of easy damage to the insulation ring of current transformers and poor sealing effect of the sealing ring during pressing in the prior art.

[0006] To achieve the above objectives, the technical solution of the current transformer insulation ring press-fitting device of the present invention is as follows:

[0007] An insulating ring pressing device for a current transformer includes a base for supporting the current transformer, a support rod extending vertically fixedly mounted on the base, the support rod passing through the support cylinder of the current transformer and coaxially arranged with the support cylinder, the support rod including an extension section extending out of the support cylinder of the current transformer, a rotating member threadedly connected to the extension section, a pressure plate disposed below the rotating member, the rotating member moving downward while rotating and pressing against the pressure plate to press the insulating ring into the gap between the sealing ring on the support cylinder of the current transformer and the sealing ring on the upper flange.

[0008] Beneficial Effects: This invention innovatively designs a current transformer insulation ring pressing device. By utilizing the coaxial arrangement of the support rod and support cylinder, it ensures that the insulation ring is always subjected to downward force during pressing, preventing misalignment due to uneven force during the pressing process, which could lead to twisting and deformation of the sealing ring and affect the sealing effect. The pressing of the insulation ring is completed by the rotating component pressing the pressure plate downwards, isolating the vertical movement of the pressure plate from the rotational movement of the rotating component. This ensures that the pressure plate only moves downwards after contacting the insulation ring. This avoids relative sliding between the pressure plate and the top surface of the insulation ring, preventing damage and extending the insulation ring's service life. Furthermore, it avoids tangential forces generated in the radial direction of the sealing ring due to the rotation of the insulation ring, which could cause twisting and deformation of the sealing ring and affect the sealing effect. In summary, the current transformer insulation ring pressing device of this invention solves the technical problems of easy damage to the insulation ring and poor sealing effect during the pressing of current transformer insulation rings in the prior art.

[0009] Furthermore, the rotating component includes a threaded sleeve, which is threadedly connected to the protruding section. A fixed sleeve is fixedly connected to the threaded sleeve, and a rotating handle is provided on the fixed sleeve.

[0010] Beneficial effects: The above design separates the threaded sleeve and the fixed sleeve, which facilitates the processing and replacement of the threaded sleeve and the fixed sleeve, improves practicality, and the rotating handle on the fixed sleeve makes it easy to rotate.

[0011] Furthermore, the fixing sleeve is threadedly connected to the threaded sleeve, and the threaded sleeve is provided with an upward stepped surface. The lower end of the fixing sleeve presses against the stepped surface, and the upper end of the threaded sleeve is threadedly connected to a clamping nut for tightening the fixing sleeve.

[0012] Beneficial effects: Through the above design, on the one hand, the threaded connection between the fixing sleeve and the threaded sleeve makes it easy to replace; on the other hand, the stepped surface can stop the lower end of the fixing sleeve, and the clamping nut can press and fix the fixing sleeve on the threaded sleeve, thus improving practicality.

[0013] Furthermore, a bearing housing is provided below the threaded sleeve, and a bearing is installed inside the bearing housing. The bearing includes an inner ring for fixed assembly with the threaded sleeve, an outer ring for fixed assembly with the inner cavity of the bearing housing, and a rotor disposed between the inner ring and the outer ring. The bearing housing is generally a cylindrical structure with a top wall at the top, and an opening is provided on the top wall. The stepped surface and the lower end face of the fixed sleeve are located in the opening, and the top wall is used to press against the upper end of the outer ring of the bearing.

[0014] Beneficial effects: Through the above design, on the one hand, the bearing can isolate the rotational movement of the threaded sleeve from the pressure plate, so that the pressure plate only moves up and down, ensuring the pressing effect of the insulating ring. On the other hand, the opening set in the top wall can arrange the stepped surface inside the bearing housing and allow the fixed sleeve to extend into the bearing housing, making the overall structure more compact and protecting the connection between the threaded sleeve stepped surface and the fixed sleeve, improving the stability of the device. At the same time, the top wall with the opening can press against the outer ring of the bearing, which can stop the outer ring of the bearing and improve the bearing's axial load-bearing capacity during the pressing of the insulating ring, thus improving the reliability of the device.

[0015] Furthermore, a bearing is provided between the rotating component and the pressure plate.

[0016] Beneficial effects: Through the above design, the rotational motion of the rotating parts is isolated from the pressure plate by the bearing, so that the pressure plate only moves vertically during the pressing process, avoiding friction between the pressure plate and the insulating ring. At the same time, the pressure plate will not be damaged due to friction during long-term use, thus protecting the pressure plate. In addition, the use of bearings makes the rotation of the rotating parts more convenient, and makes the overall structure compact and easy to operate.

[0017] Furthermore, the rotating component is provided with an annular protrusion, and a bearing seat is provided on the outer side of the rotating component. The bearing includes a first bearing installed in the bearing seat. The first bearing includes a first inner ring fixedly assembled on the rotating component, a first outer ring fixed to the inner cavity of the bearing seat, and a first roller disposed between the first outer ring and the first inner ring. The upper end of the first inner ring presses against the lower end surface of the annular protrusion, and the lower end of the first outer ring presses against the pressure plate.

[0018] Beneficial effects: Through the above design, the annular protrusion can be used to stop the first inner ring, increase the bearing's axial force capacity, improve the stability of the pressing process, and at the same time prevent the first bearing from shaking during the pressing process, thus affecting the pressing effect.

[0019] Furthermore, the bearing also includes a second bearing, which includes a second inner ring fixedly mounted on the rotating component, a second outer ring fixed to the inner cavity of the bearing housing, and a second roller disposed between the second inner ring and the second outer ring. The lower end of the second inner ring presses against the upper end surface of the annular protrusion. The bearing housing includes a top wall with an opening for avoiding the inner ring. The upper end of the second outer ring presses against the top wall of the bearing housing.

[0020] Beneficial effects: Through the above design, the second bearing and the first bearing are respectively arranged on the upper and lower sides of the annular protrusion. The two bearings together guide the rotating part in the axial direction, which can prevent the pressure plate from shaking during vertical movement and prevent the insulating ring from affecting the sealing effect due to uneven force. At the same time, the upper end of the second outer ring is pressed and engaged with the top wall of the bearing housing. On the one hand, it facilitates the upward movement of the rotating part after pressing. On the other hand, it can utilize the top wall of the bearing housing to improve the axial force capacity of the second bearing and improve the stability of the rotating part when moving upward.

[0021] Furthermore, the pressure plate has a notch corresponding to the pressure plate on the current transformer, the notch being used for the pressure plate to pass through and press the insulating ring.

[0022] Beneficial effects: Through the above design, after the pressure plate has pressed the insulating ring into place, the notch can be used to fix the pressure plate on the insulating ring first, and then the rotating part can be removed. The pressure plate is used to maintain the position of the insulating ring, so as to avoid the pressing effect being affected by the position of the insulating ring, which would lead to a decrease in sealing performance.

[0023] Furthermore, adjusting bolts for adjusting the level of the base are fixedly installed on the bottom surface of the base.

[0024] Beneficial effects: Through the above design, the level of the base can be adjusted by adjusting the adjusting bolts, so that the insulating ring is always subjected to vertical downward force during the pressing process, avoiding the poor pressing effect caused by the tilt of the base, which in turn affects the sealing effect. Attached Figure Description

[0025] Figure 1 Schematic diagram of existing current transformer structure;

[0026] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0027] Figure 3 This is a schematic diagram of the overall structure of Embodiment 1 of the current transformer insulation ring pressing device of the present invention;

[0028] Figure 4 This is a schematic diagram of the rotating component of Embodiment 1 of the current transformer insulation ring pressing device of the present invention;

[0029] Figure 5 This is a cross-sectional view of the rotating component of Embodiment 1 of the current transformer insulation ring pressing device of the present invention;

[0030] Figure 6 This is a schematic diagram of the pressing process of Embodiment 1 of the current transformer insulation ring pressing device of the present invention;

[0031] Figure 7 This is a schematic diagram of the pressing and installation completed in Embodiment 1 of the current transformer insulation ring pressing device of the present invention;

[0032] Figure 8 This is a cross-sectional view of the pressing process of Embodiment 1 of the current transformer insulation ring pressing device of the present invention;

[0033] Figure 9 This is a cross-sectional view of the completed pressing of the current transformer insulation ring pressing device according to Embodiment 1 of the present invention.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Guide screw; 2. Screw sleeve; 3. Locking nut; 4. Bearing housing; 5. Rotary handle; 6. Pressure plate; 7. Bearing; 8. Screw; 9. Support rod; 10. Base; 11. Adjusting bolt; 12. Rotating component; 13. Current transformer; 131. Upper flange; 132. Lower flange; 133. Support cylinder; 134. Sealing ring; 135. Insulating ring; 136. Pressure plate; 137. Pressure plate mounting hole; 14. Fixing sleeve. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, and not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0038] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0039] The terms “up,” “down,” “front,” “back,” “left,” “right,” etc., indicate assumed orientations or positional relationships and are used only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0040] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0041] Specific embodiment 1 of the current transformer insulation ring pressing device provided by the present invention:

[0042] The current transformer insulation ring pressing device of the present invention utilizes the coaxial arrangement of the support rod and the support cylinder to ensure that the insulation ring is always under downward force during the pressing process. This avoids misalignment of the insulation ring due to uneven force during the pressing process, which could cause the sealing ring to twist and deform, thus ensuring the sealing effect of the sealing ring. Furthermore, the downward movement of the pressing plate by the rotating component isolates the vertical movement of the pressing plate from the rotational movement of the rotating component. This ensures that the pressing plate only moves downward after contacting the insulation ring, preventing relative sliding between the top surface of the insulation ring and the pressing plate, which could damage the insulation ring. Therefore, it not only ensures the sealing effect but also protects the insulation ring.

[0043] In this embodiment, as Figure 6 , 7 As shown, the current transformer 13 applicable to the current transformer insulation ring pressing device of the present invention is a three-phase integrated structure, that is, the current transformer 13 includes three support cylinders 133, and flange holes corresponding to the three support cylinders 133 are respectively provided on the upper flange 131 and the lower flange 132.

[0044] Specifically, such as Figure 3As shown, the current transformer insulation ring pressing device (hereinafter referred to as the pressing device) of the present invention includes a base 10, and three adjusting bolts 11 are arranged in a circumferential array on the bottom surface of the base 10. The base 10 can be adjusted to be horizontal by means of the adjusting bolts 11. In other embodiments, the number of adjusting bolts 11 can be arranged according to actual needs, such as 4, 6, 8, etc.

[0045] Above the base 10, there are three support rods 9 that correspond one-to-one with the three support cylinders 133 on the current transformer 13. Each support rod 9 passes through its corresponding support cylinder 133 and is arranged coaxially with its corresponding support cylinder 133. The upper end of the support rod 9 is fixedly installed with a guide screw 1 that extends out of the support cylinder 133. A rotating part 12 is screwed on the guide screw 1. A pressure plate 6 is provided below the rotating part 12. While rotating, the rotating part 12 moves downward and presses against the pressure plate 6 to press the insulating ring 135 into the gap between the sealing ring 134 on the support cylinder 133 and the sealing ring 134 on the upper flange 131.

[0046] Specifically, such as Figure 4 , 5 As shown, the rotating component 12 includes a threaded sleeve 2 threadedly connected to the guide screw 1. An external thread is provided on the outer circumferential surface of the threaded sleeve 2, and a fixed sleeve 14 is threadedly connected thereto. A rotating handle 5 is fixedly installed on the fixed sleeve 14. The threaded sleeve 2 has an upward-facing stepped surface, and the lower end of the fixed sleeve 14 presses against the stepped surface. A locking nut 3 is threadedly connected to the upper end of the threaded sleeve 2. The locking nut 3 can lock the fixed sleeve 14 onto the threaded sleeve 2. This arrangement ensures that the rotating component 12 always moves in the vertical direction by using the threaded connection between the threaded sleeve 2 and the protruding end, thus preventing... The shaking of the pressure plate 6 during the pressing process causes changes in the pressing position, affecting the pressing effect. At the same time, the threaded connection between the screw sleeve 2 and the protruding end allows the pressure plate 6 to press the insulating ring 135 at a more uniform speed, avoiding the sealing ring from twisting and deforming due to large speed fluctuations, which would result in a poor sealing effect. Moreover, the threaded connection can also improve the pressing accuracy, thereby improving the sealing effect. On the other hand, the separate design of the screw sleeve 2, the fixed sleeve 14, and the rotating handle 5 facilitates processing and replacement, improves practicality, and the rotating handle 5 set on the fixed sleeve 14 makes it easy to rotate.

[0047] A bearing seat 4 is provided on the outer side below the threaded sleeve 2. The bearing seat 4 is a cylindrical structure with a top wall. An opening is provided on the top wall. The stepped surface of the threaded sleeve 2 and the lower end of the fixed sleeve 14 are located inside the opening 4. This arrangement makes the overall structure of the rotating part 12 more compact. On the other hand, placing the stepped surface inside the bearing seat 4 allows the top wall to protect the connection between the stepped surface of the threaded sleeve 2 and the fixed sleeve 14, thereby improving the stability of the device.

[0048] A bearing is fixedly installed inside the bearing housing 4. An annular protrusion is provided at the lower end of the threaded sleeve 2 and is located inside the bearing housing 4. A second bearing is installed at the upper end of the annular protrusion, and a first bearing is installed at the lower end of the annular protrusion. The first bearing includes a first inner ring fixedly mounted on the outer circumferential surface of the threaded sleeve 2, a first outer ring fixed to the inner cavity of the bearing housing 4, and a first roller disposed between the first inner ring and the first outer ring. The upper end of the first inner ring presses against the lower end surface of the annular protrusion, and the lower end of the first outer ring is flush with the lower end of the bearing housing 4. The second bearing includes a second inner ring fixedly mounted on the outer circumferential surface of the threaded sleeve 2, a first inner ring fixed to the inner cavity of the bearing housing 4, and a second roller disposed between the first inner ring and the second inner ring. The lower end of the second inner ring presses against the upper end surface of the annular protrusion, and the upper end of the second outer ring presses against the top wall of the bearing housing 4. To ensure that the top wall does not affect the operation of the second bearing, the inner diameter of the top wall needs to be larger than the outer diameter of the second inner ring.

[0049] An outwardly extending flange is provided at the lower end of the bearing housing 4. A pressure plate 6 for pressing the insulating ring 135 is fixedly connected to the lower end of the flange by screws 8. An opening for avoiding the first inner ring is provided on the upper surface of the pressure plate 6. Preferably, the diameter of the opening on the upper surface of the base 10 is smaller than the outer diameter of the first outer ring. Thus, the lower end of the first outer ring is pressed against the pressure plate 6, and the pressure plate 6 provides blocking support for the first outer ring.

[0050] With the above configuration, the bearing includes a first bearing and a second bearing, and the second bearing and the first bearing are respectively disposed on the upper and lower sides of the annular protrusion. The two bearings 7 can jointly guide the movement of the rotating part 12 on the bearing 7, so as to avoid the pressure plate 6 from shaking during vertical movement and affecting the pressing efficiency.

[0051] The first and second bearings isolate the rotational motion of the threaded sleeve 2 from that of the pressure plate 6, ensuring that the pressure plate 6 is not subjected to radial force. Consequently, when the pressure plate 6 presses against the insulating ring 135, the pressure plate 6 and the insulating ring 135 remain relatively stationary. This prevents relative movement between the pressure plate 6 and the insulating ring 135 from causing wear and scratches on the upper surface of the insulating ring 135, thus reducing its service life. Simultaneously, it avoids the tangential force generated radially on the sealing ring 134 due to the rotation of the insulating ring 135, which could cause the sealing ring 134 to twist and deform, affecting the sealing effect. On the one hand, the two bearings 7 ensure that the pressure plate 6 only moves up and down, which ensures that the insulating ring 135 is always under downward force during pressing, and avoids the insulating ring 135 from being misaligned due to uneven force, which would cause the insulating ring 135 to be twisted and deformed, affecting the sealing effect. At the same time, the pressure plate 6 and the insulating ring 135 are relatively stationary, which can prevent friction between the pressure plate 6 and the insulating ring 135. In addition, the pressure plate 6 will not be damaged due to friction during long-term use, which can protect the pressure plate 6. Furthermore, the use of bearings makes the rotation of the rotating part 12 more convenient.

[0052] The annular protrusion can be used to stop the first inner ring, increasing the axial force capacity of the first bearing during the press-fitting process and improving the stability of the press-fitting process. The top wall of the bearing seat 4 can be used to stop the upper end of the second outer ring. On the one hand, this facilitates the upward movement of the rotating part 12 after press-fitting, and on the other hand, the top wall of the bearing seat 4 can be used to increase the axial force capacity of the second bearing and improve the stability of the rotating part 12 when it moves upward.

[0053] In this embodiment, both the first and second bearings are tapered roller bearings 7, and the two tapered roller bearings 7 are installed face-to-face. This arrangement can utilize the tapered roller bearings 7 to increase the bearing capacity of the rotating component 12, enabling it to withstand greater axial force, ensuring stability during the press-fitting process, and improving the practicality and reliability of the press-fitting device. In other embodiments, the first and second bearings can also be thrust bearings 7 to increase the bearing capacity of the rotating component 12. In other embodiments, if the bearing capacity requirement of the bearings 7 is not high, the first and second bearings can also be deep groove ball bearings 7.

[0054] like Figure 2 , 4 As shown in Figure 7, in this embodiment, three pressure plate mounting holes 137 are arranged circumferentially on the upper flange 131 of the current transformer 13. A pressure plate 136 is fixed to each pressure plate mounting hole 137. The end of the pressure plate 136 facing the support cylinder 133 is pressed against the insulating ring 135. A notch is provided on the pressure plate 6 to correspond to the pressure plate 136 on the current transformer 13. The notch allows the pressure plate 136 on the current transformer 13 to pass through and press against the insulating ring 135. This arrangement allows the pressure plate 136 to be fixed to the insulating ring 135 after the pressure plate 6 has pressed it in place. Then, the rotating part 12 can be removed, and the pressure plate 136 can be used to maintain the position of the insulating ring 135, preventing changes in the position of the insulating ring 135 from affecting the pressing effect and thus causing a decrease in sealing performance. In other embodiments, the number of notches on the pressure plate 6 can be set according to the number of pressure plates 136, such as 2, 4, or 6.

[0055] like Figure 2 and 6 As shown in Figure 9, the usage process of the current transformer insulation ring pressing device of the present invention is as follows:

[0056] First, adjust the base 10 to a horizontal position using adjusting bolt 11. Then, fix the current transformer 13 onto the base 10, ensuring that the three support cylinders 133 of the current transformer 13 are coaxially arranged with each support rod 9. Place an insulating ring 135 between the support cylinder 133 and the upper flange 131. Next, thread the sleeve 2 onto the guide screw 1 at the upper end of the support rod 9. Rotate the handle 5 to move the pressure plate 6 downwards. The pressure plate 6 will rotate due to the sleeve 2. When the pressure plate 6 contacts the upper surface of the insulating ring 135, the pressure plate 6 and the insulating ring 135 will interact under the action of the first and second bearings. When the two are relatively stationary, continue to rotate the handle 5. At this time, the pressure plate 6 and the insulating ring 135 only move downward to ensure that the upper end face of the insulating ring 135 is evenly stressed. When the insulating ring 135 is fully pressed into the gap between the sealing ring 134 on the support cylinder 133 and the sealing ring 134 on the upper flange 131, stop rotating the handle 5. If the notch on the pressure plate 6 does not correspond to the corresponding pressure plate 136 at this time, gently rotate the pressure plate 6 to make the notch position. Then fix the pressure plate 136 in the fixing hole of the pressure plate 136 and press the pressure plate 136 tightly onto the insulating ring 135 to complete the pressing of the entire insulating ring 135.

[0057] Since the insulating ring 135 has already been pressed into place, gently rotating the pressure plate 6 will not affect the pressing effect of the insulating ring 135. At the same time, the slight relative sliding between the pressure plate 6 and the insulating ring 135 will not cause too much wear to the upper surface of the insulating ring 135, which is within an acceptable range.

[0058] In this embodiment, the current transformer 13 is a three-phase integrated structure. In other embodiments, if the structure of the current transformer 13 changes and the number of support cylinders 133 is different, then the number of support rods 9 will also be adjusted accordingly to keep the number of support rods 9 consistent with the number of support cylinders 133. For example, in a single-phase current transformer 13, only one support rod 9 is provided.

[0059] In this embodiment, three support rods 9 can be used to simultaneously position the three support cylinders 133 of the current transformer 13, which can improve efficiency and reduce the positioning process. In other embodiments, only one support rod 9 can be set. In this case, the three support cylinders 133 need to be arranged coaxially on the support rod 9 in sequence to complete the press-fitting.

[0060] In summary, the present invention ensures that the pressure plate 6 is unaffected by the rotational motion of the rotating component 12 through the first and second bearings. During the pressing of the insulating component by the pressure plate 6, the pressure plate 6 and the insulating ring 135 remain relatively stationary, preventing wear on the upper surface of the insulating ring 135 and ensuring its service life. By using the coaxial arrangement of the support rod 9 and the support cylinder 133, and the spiral of the rotating component 12 on the guide screw 1 at the upper end of the support rod 9, it is ensured that the upper surface of the insulating ring 135 is always subjected to uniform force during the pressing process, avoiding the twisting and deformation of the sealing ring 134 and the deterioration of the sealing effect due to uneven force. In summary, the current transformer insulating ring pressing device of the present invention solves the technical problems of easy damage to the insulating ring 135 during pressing and poor sealing effect of the sealing ring 134 in the prior art.

[0061] Embodiment 2 of the current transformer insulation ring pressing device of the present invention: The difference between this embodiment and embodiment 1 is that this embodiment provides a different pressure plate. In embodiment 1, the pressure plate has a notch corresponding to the pressure plate on the current transformer (13). The notch is used for the pressure plate to pass through and press the insulation ring. In this embodiment, the notch may not be provided on the pressure plate. In this case, after pressing is completed, the rotating part and the pressure plate are removed first, and then the pressure plate is used to press the insulation ring.

[0062] Embodiment 3 of the current transformer insulation ring pressing device of the present invention: The difference between this embodiment and embodiment 1 is that this embodiment provides a different base structure. In embodiment 1, an adjusting bolt for adjusting the level of the base is fixedly installed on the bottom surface of the base. In this embodiment, the adjusting bolt can be omitted. By improving the processing accuracy of the base, the upper surface of the base can be made smooth and flat. At this time, the base can be placed directly on the horizontal surface to ensure the level of the base, and no further leveling is required.

[0063] Embodiment 4 of the current transformer insulation ring pressing device of the present invention: The difference between this embodiment and embodiment 1 is that this embodiment provides a different bearing arrangement. In embodiment 1, the bearing includes a first bearing and a second bearing. In this embodiment, when the pressing of the insulation ring can be completed by the first bearing, only the first bearing can be set.

[0064] Embodiment 5 of the current transformer insulation ring press-fit device of the present invention: The difference between this embodiment and Embodiment 1 is that this embodiment provides a different type of bearing. In Embodiment 1, the bearing includes an outer ring, an inner ring, and rollers disposed between the outer ring and the inner ring. In this embodiment, the bearing can be a thrust bearing. The installation method of the thrust bearing is prior art in the art and will not be described in detail here.

[0065] Embodiment 6 of the current transformer insulation ring pressing device of the present invention: The difference between this embodiment and Embodiment 1 is that this embodiment provides a rotating component and a pressing plate with different structural forms. In Embodiment 1, a bearing is provided between the rotating component and the pressing plate. In this embodiment, no bearing is provided between the rotating component and the pressing plate. At this time, an annular groove is provided at the lower end of the threaded sleeve. The pressing plate is engaged in the annular groove. By processing the roughness of the pressing plate and the annular groove, the contact surface between the two is made smooth, reducing the friction between the two, so that the two can rotate relative to each other, thereby making the pressing plate relatively stationary with respect to the insulation ring when pressing the insulation ring.

[0066] Embodiment 7 of the current transformer insulation ring pressing device of the present invention: The difference between this embodiment and embodiment 1 is that this embodiment provides a threaded sleeve and a fixed sleeve with different structural forms. In embodiment 1, the fixed sleeve and the threaded sleeve are threadedly connected. In this embodiment, the threaded sleeve and the fixed sleeve are integrally formed into a rotating sleeve, and the rotating sleeve directly presses against the pressure plate.

[0067] Embodiment 8 of the current transformer insulation ring pressing device of the present invention: The difference between this embodiment and Embodiment 1 is that this embodiment provides a different connection method between the screw sleeve and the fixed sleeve. In Embodiment 1, the fixed sleeve and the screw sleeve are threadedly connected, and the screw sleeve is provided with an upward stepped surface. The lower end of the fixed sleeve presses against the stepped surface, and the upper end of the screw sleeve is threadedly connected with a clamping nut for pressing the fixed sleeve. In this embodiment, the fixed sleeve is assembled with the screw sleeve to prevent rotation by an anti-rotation key.

[0068] Embodiment 9 of the current transformer insulation ring pressing device of the present invention: The difference between this embodiment and embodiment 1 is that this embodiment provides a different rotating component. In embodiment 1, a fixed sleeve is threadedly connected to the screw sleeve, and a rotating handle is provided on the fixed sleeve. In this embodiment, the screw sleeve, the fixed sleeve, and the rotating handle are integrally formed.

[0069] Embodiment 10 of the current transformer insulation ring pressing device of the present invention: The difference between this embodiment and Embodiment 1 is that this embodiment provides a different rotating component. In Embodiment 1, a fixed sleeve is threadedly connected to the screw sleeve, and a rotating handle is provided on the fixed sleeve. In this embodiment, no rotating handle is provided on the fixed sleeve, and the outer peripheral surface of the fixed sleeve is polygonal. The polygonal shape of the fixed sleeve is directly rotated using a wrench. In other embodiments, no rotating handle is provided on the fixed sleeve, and the outer peripheral surface of the fixed sleeve is polygonal. A polygonal cylinder adapted to the outer peripheral surface of the fixed sleeve is fitted on the outer peripheral surface of the fixed sleeve, and a rotary motor is connected to the upper end of the polygonal cylinder. The rotary motor drives the screw sleeve to rotate.

[0070] Embodiment 11 of the current transformer insulation ring pressing device of the present invention: The difference between this embodiment and Embodiment 1 is that this embodiment provides a different support rod. In Embodiment 1, a guide screw is fixedly installed at the upper end of the support rod, and the guide screw extends out of the upper end of the support cylinder. In this embodiment, the support rod and the guide screw are integrally formed, and a threaded section for threaded engagement with the bushing is directly machined at the upper end of the support rod.

[0071] Embodiment 12 of the current transformer insulation ring pressing device of the present invention: The difference between this embodiment and embodiment 1 is that this embodiment provides a different rotating component. In embodiment 1, an opening is provided on the top wall of the bearing seat, and the stepped surface and the lower end surface of the fixed sleeve are located in the opening. In this embodiment, the stepped surface is located above the bearing seat, and only an opening for the threaded sleeve to pass through is provided on the top wall.

[0072] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A current transformer insulation ring press-fitting device, characterized in that, Includes a base for supporting the current transformer (13), on which a support rod (9) extending vertically is fixedly mounted. The support rod (9) passes through the support cylinder (133) of the current transformer (13) and is coaxially arranged with the support cylinder (133) of the current transformer (13). The support rod (9) includes an extension section for extending out of the support cylinder (133) of the current transformer (13). A rotating member (12) is threadedly connected to the extension section. A pressure plate (6) is provided below the rotating member (12). The rotating part (12) is used to move downward while rotating and press the pressure plate (6) to press the insulating ring (135) into the gap between the sealing ring (134) on the support cylinder (133) of the current transformer (13) and the sealing ring (134) on the upper flange (131); the pressure plate (6) is provided with a notch corresponding to the pressure plate (136) on the current transformer (13), the notch is used for the pressure plate (136) to pass through and press the insulating ring (135).

2. The current transformer insulation ring pressing device according to claim 1, characterized in that, The rotating component (12) includes a screw sleeve (2), which is threadedly connected to the protruding section. A fixed sleeve (14) is fixedly connected to the screw sleeve (2), and a rotating handle (5) is provided on the fixed sleeve (14).

3. The current transformer insulation ring pressing device according to claim 2, characterized in that, The fixing sleeve (14) is threadedly connected to the screw sleeve (2), and the screw sleeve (2) is provided with an upward stepped surface. The lower end of the fixing sleeve (14) presses against the stepped surface, and the upper end of the screw sleeve (2) is threadedly connected to a clamping nut for pressing the fixing sleeve (14).

4. The current transformer insulation ring pressing device according to claim 3, characterized in that, Below the threaded sleeve (2) is a bearing seat (4), and inside the bearing seat (4) is a bearing (7). The bearing (7) includes an inner ring for fixed assembly with the threaded sleeve (2), an outer ring for fixed assembly with the inner cavity of the bearing seat (4), and a rotor disposed between the inner ring and the outer ring. The bearing seat (4) is a cylindrical structure with a top wall on the upper part. An opening is provided on the top wall. The stepped surface and the lower end face of the fixed sleeve (14) are located in the opening, and the top wall is used to press against the upper end of the outer ring of the bearing (7).

5. The current transformer insulation ring pressing device according to any one of claims 1-3, characterized in that, A bearing (7) is provided between the rotating component (12) and the pressure plate (6).

6. The current transformer insulation ring pressing device according to claim 5, characterized in that, The rotating part (12) is provided with an annular protrusion, and a bearing seat (4) is provided on the outer side of the rotating part (12). The bearing (7) includes a first bearing installed in the bearing seat (4). The first bearing includes a first inner ring fixedly assembled on the rotating part (12), a first outer ring fixed to the inner cavity of the bearing seat (4), and a first roller disposed between the first outer ring and the first inner ring. The upper end of the first inner ring presses against the lower end surface of the annular protrusion, and the lower end of the first outer ring presses against the pressure plate (6).

7. The current transformer insulation ring pressing device according to claim 6, characterized in that, The bearing (7) also includes a second bearing, which includes a second inner ring fixedly mounted on the rotating part (12), a second outer ring fixed to the inner cavity of the bearing seat (4), and a second roller disposed between the second inner ring and the second outer ring. The lower end of the second inner ring presses against the upper end surface of the annular protrusion. The bearing seat (4) includes a top wall with an opening for avoiding the inner ring. The upper end of the second outer ring presses against the top wall of the bearing seat (4).

8. The current transformer insulation ring pressing device according to any one of claims 1-4, characterized in that, An adjusting bolt (11) for adjusting the level of the base (10) is fixedly installed on the bottom surface of the base (10).

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