Clamping plate, core structure and mutual inductor
By setting conductive elements and inserts in the clamping plate of the capacitive voltage transformer to be electrically connected, the problem of unequal potential between inserts is solved, and the partial discharge performance of the product is improved.
Patent Information
- Application Number
- CN202422922156.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2034-11-28
AI Technical Summary
In existing capacitive voltage transformers, the potentials between the clamping plate inserts are unequal, resulting in floating potentials and affecting the partial discharge performance of the product.
Conductive members are used to electrically connect all the inserts to make the potentials between all the inserts equal, and the inserts are connected together through the conductive members to prevent the generation of floating potential.
It effectively prevents the floating potential between the inserts and improves the partial discharge performance of the capacitive voltage transformer.
Smart Images
Figure CN223471485U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to electrical measurement technical field especially relates to a clamp plate, core structure and mutual inductor. BACKGROUND
[0002] The capacitance core structure of the capacitance type voltage transformer (CVT) is formed by pressing the capacitive elements.
[0003] In the related art, the core structure is usually composed of two clamp plates clamping a plurality of capacitive elements in series, and a certain pressure is applied between the clamp plates to make the clamp plates reach the designed compression coefficient for the capacitive elements, so that the capacitance meets the design requirements. In order to facilitate the fixation of the clamp plate and the connection between the capacitive elements and other components, an insert for bolt connection is usually embedded in the clamp plate. During the use of the capacitance type voltage transformer, the potentials between the inserts in the clamp plate may not be equal, resulting in a floating potential and affecting the partial discharge performance of the product. SUMMARY
[0004] One object of the utility model is to provide a clamp plate that effectively prevents the occurrence of floating potential between inserts.
[0005] To achieve this object, the utility model adopts the following technical solutions:
[0006] A clamp plate is provided for clamping a core group composed of a plurality of capacitive elements. The clamp plate comprises:
[0007] a plate body;
[0008] a plurality of inserts are spaced apart and embedded in the peripheral portion of the plate body;
[0009] a conductive member is embedded in the plate body, and the conductive member is electrically connected to all the inserts, and all the inserts are set to the same potential through the conductive member.
[0010] Optionally, the conductive member includes a first conductive segment, and the first conductive segment is arranged between adjacent two inserts. One of the adjacent two inserts is electrically connected to the first end of the corresponding first conductive segment, and the other is electrically connected to the second end of the corresponding first conductive segment.
[0011] Optionally, the peripheral portion of the plate body is spaced apart and provided with at least two insert groups, and each insert group includes at least one insert.
[0012] The conductive part comprises a conductive ring and at least two second conductive segments which are arranged around the conductive ring at intervals, the second conductive segments are arranged in one-to-one correspondence with the insert groups, the first end of the second conductive segment is electrically connected with the conductive ring, and the second end of the second conductive segment is electrically connected with all the inserts in the corresponding insert group.
[0013] Optionally, the second end of the second conductive segment is electrically connected in one-to-one correspondence with the insert.
[0014] Alternatively, the insert group comprises at least two inserts, the second end of the second conductive segment is provided with at least two branch segments, and the branch segments are electrically connected in one-to-one correspondence with the inserts of the corresponding insert group.
[0015] Alternatively, the conductive part further comprises a third conductive segment, the insert group comprises at least three inserts, the third conductive segment is arranged between every two adjacent inserts in the insert group, one of the two adjacent inserts in the insert group is electrically connected with the first end of the corresponding third conductive segment, and the other is electrically connected with the second end of the corresponding third conductive segment, and at least one of the third conductive segments electrically connected with the same insert group is electrically connected with the second end of the corresponding second conductive segment.
[0016] Optionally, the conductive part is a wire or a conductive strip.
[0017] Another purpose of the utility model lies in providing a core structure, which comprises:
[0018] Two clamping plates described above;
[0019] A core group comprising a plurality of capacitor elements arranged side by side, the core group is clamped between the two clamping plates along the side-by-side direction of the capacitor elements.
[0020] Optionally, the utility model further comprises two oppositely arranged fixing plates, the clamping plate and the core group are located between the two fixing plates, and the two ends of the fixing plate are provided with screw members which are threadedly connected with the inserts on the clamping plate.
[0021] Optionally, a first gasket is arranged between the clamping plate and the core group.
[0022] Optionally, a second gasket is arranged between at least some adjacent capacitor elements, the second gasket is provided with two through holes corresponding to the fixing plates in one-to-one correspondence, and the fixing plates are arranged in the through holes.
[0023] Another purpose of the utility model lies in providing a mutual inductor, which comprises:
[0024] An insulating shell;
[0025] At least one of the above-mentioned core structures is provided in the insulating shell.
[0026] Beneficial effects: the clamping plate provided by the utility model, through the electrically conductive part and all the inserts are electrically connected, so that the potential between all the inserts is equal, and then the suspended potential between the inserts is prevented, so that the product composed of the clamping plate and the core group has good partial discharge performance.
[0027] The core structure provided by the utility model has good partial discharge performance through the setting of the clamping plate.
[0028] The mutual inductor provided by the utility model has good partial discharge performance through the setting of the core structure. BRIEF DESCRIPTION OF DRAWINGS
[0029] Figure 1 is the sectional view of the clamping plate provided by the utility model;
[0030] Figure 2 is the structural schematic diagram of the first kind of implementation mode of the clamping plate provided by the utility model;
[0031] Figure 3 is the structural schematic diagram of the second kind of implementation mode of the clamping plate provided by the utility model;
[0032] Figure 4 is the structural schematic diagram of the third kind of implementation mode of the clamping plate provided by the utility model;
[0033] Figure 5 is the structural schematic diagram of the fourth kind of implementation mode of the clamping plate provided by the utility model;
[0034] Figure 6 is the structural explosion view of one kind of implementation mode of the plate main body provided by the utility model;
[0035] Figure 7 is the structural schematic diagram of the core structure provided by the utility model;
[0036] Figure 8 is the structural schematic diagram of the second gasket provided by the utility model;
[0037] Figure 9 is the structural schematic diagram of the mutual inductor provided by the utility model.
[0038] In the drawing:
[0039] 100, clamping plate; 110, plate body; 111, first plate; 1111, first annular surface; 1112, convex surface; 112, second plate; 1121, second annular surface; 1122, concave surface; 1123, accommodating groove; 120, insert; 130, conductive member; 131, first conductive section; 132, conductive ring; 133, second conductive section; 1331, branch section; 134, third conductive section;
[0040] 200, core structure; 210, core group; 220, fixing plate; 230, first gasket; 240, second gasket; 241, through hole;
[0041] 310, insulating shell; 320, connecting piece. DETAILED DESCRIPTION
[0042] The utility model will be described in further detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.
[0043] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0044] In the utility model, unless otherwise explicitly specified and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0045] In the description of the present embodiment, the terms "upper", "lower", "right", "left", and the like, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used to distinguish in the description, and have no special meaning.
[0046] Referring to Figures 1 to 4 As shown in the drawings, the present embodiment provides a clamp plate, which is used for clamping a core group 210 composed of a plurality of capacitive elements.
[0047] Specifically, the clamp plate comprises a plate body 110, inserts 120, and a conductive member 130. The inserts 120 are provided in plurality and are arranged at intervals on the peripheral portion of the plate body 110; the conductive member 130 is embedded in the plate body 110, and the conductive member 130 is electrically connected to all the inserts 120, and all the inserts 120 are set to the same potential through the conductive member 130.
[0048] In the present embodiment, the conductive member 130 is electrically connected to all the inserts 120, so that the potentials between all the inserts 120 are equal, thereby preventing the generation of floating potential between the inserts 120, and enabling the product composed of the clamp plate and the core group 210 to have good partial discharge performance.
[0049] Exemplarily, the inserts 120 can be arranged at intervals along the circumference of the plate body 110.
[0050] Exemplarily, the inserts 120 can be arranged centrally along the thickness direction of the plate body 110.
[0051] Exemplarily, the material of the inserts 120 is a conductive material.
[0052] Exemplarily, the inserts 120 are provided with threaded holes. The clamp plate can be connected to a structural member by screwing the inserts 120 through the threaded holes, so as to fix the clamp plate; or the core group 210 can be electrically connected to the conductive member by screwing the inserts 120 through the threaded holes.
[0053] Exemplarily, the material of the plate body 110 is sheet molding compound (SMC) or epoxy resin. The plate body 110 is embedded with the inserts 120 and the conductive member 130 when it is injection molded.
[0054] Exemplarily, the conductive member 130 can be a wire, such as a copper wire.
[0055] Exemplarily, the conductive member 130 can be a conductive strip, such as a copper strip.
[0056] In the embodiment, the copper wire and the copper band have large current-carrying capacity, low resistivity, excellent electrical conductivity, and good ductility and strength, and can be embedded when the plate body 110 is injection molded.
[0057] In some embodiments, as shown in Figure 2 The conductive part 130 includes a first conductive section 131, and the first conductive section 131 is arranged between two adjacent inserts 120. One of the two adjacent inserts 120 is electrically connected to a first end of the corresponding first conductive section 131, and the other is electrically connected to a second end of the corresponding first conductive section 131, so that the potentials between all the inserts 120 are equal, thereby preventing the generation of floating potentials between the inserts 120 and facilitating connection.
[0058] Exemplarily, the two adjacent first conductive sections 131 can be welded together.
[0059] Exemplarily, all the first conductive sections 131 can be an integral structure, i.e., the first conductive section 131 is annular.
[0060] In some embodiments, as shown in Figures 3 to 5 The plate body 110 is provided with at least two insert groups at intervals around the circumference, and each insert group includes at least one insert 120. The conductive part 130 includes a conductive ring 132 and at least two second conductive sections 133 arranged at intervals around the conductive ring 132. The second conductive sections 133 are arranged one-to-one with the insert groups, the first end of the second conductive section 133 is electrically connected to the conductive ring 132, and the second end of the second conductive section 133 is electrically connected to all the inserts 120 in the corresponding insert group, so that the potentials between all the inserts 120 are equal, thereby preventing the generation of floating potentials between the inserts 120.
[0061] In a feasible implementation, as shown in Figure 3 The second end of the second conductive section 133 is electrically connected to the insert 120 one-to-one. In the embodiment, the conductive ring 132 and the second conductive section 133 can be an integral structure, which is convenient for connection with the insert 120. Of course, the conductive ring 132 and the second conductive section 133 can also be designed separately. When the clamping plate is formed, the conductive ring 132 and the second conductive section 133 can be welded together first, then the second conductive section 133 and the insert 120 are welded together, and finally the plate body 110 is injection molded on the insert 120 and the conductive part 130.
[0062] In a feasible implementation, as shown in Figure 4As shown, the insert group includes at least two inserts 120, and the second end of the second conductive section 133 is provided with at least two branch sections 1331, which are in one-to-one correspondence with the inserts 120 of the corresponding insert group and are electrically connected thereto. In this embodiment, the second conductive section 133 and the branch section 1331 can be an integral structure, or the conductive ring 132, the second conductive section 133, and the branch section 1331 are an integral structure, which facilitates connection with the insert 120. Of course, the conductive ring 132, the second conductive section 133, and the branch section 1331 can also be designed in a split body. When the clamping plate is formed, the conductive ring 132, the second conductive section 133, and the branch section 1331 can be welded together first, then the branch section 1331 and the insert 120 are welded together, and finally the insert 120 and the conductive member 130 are injection molded with the plate main body 110.
[0063] Exemplarily, the peripheral portion of the plate main body 110 includes a plurality of connection surfaces connected in sequence, and the connection surfaces are provided in one-to-one correspondence with the insert groups. The connection surfaces are provided with the inserts 120 of the corresponding insert groups, and the branch sections 1331 of the second conductive sections 133 are electrically connected in one-to-one correspondence with the inserts 120 on the corresponding connection surfaces. For example, the plate main body 110 can be a rectangular plate. Specifically, the connection surfaces include two first connection surfaces arranged opposite to each other along a first direction and two second connection surfaces arranged opposite to each other along a second direction, and two inserts 120 are arranged on each of the first connection surfaces and the second connection surfaces. The first direction can be the length direction of the clamping plate, and the second direction can be the width direction of the clamping plate. In this embodiment, the clamping plate can be connected to the structural member through the inserts 120 on the first connection surfaces to achieve fixation of the clamping plate, and the core group 210 and the conductive member can be electrically connected together through the inserts 120 on the second connection surfaces.
[0064] In a feasible implementation manner, as shown in Figure 5 The conductive member 130 further includes a third conductive section 134, and the insert group includes at least three inserts 120. The third conductive section 134 is arranged between any two adjacent inserts 120 in the insert group. One of the two adjacent inserts 120 in the insert group is electrically connected to the first end of the corresponding third conductive section 134, and the other is electrically connected to the second end of the corresponding third conductive section 134. At least one of the third conductive sections 134 electrically connected to the same insert group is electrically connected to the second end of the corresponding second conductive section 133. In this embodiment, when the clamping plate is formed, the conductive ring 132 and the second conductive section 133 can be welded together first, and the third conductive section 134 and the insert 120 can be welded together. Then, the second conductive section 133 and the third conductive section 134 are welded together, and finally the insert 120 and the conductive member 130 are injection molded with the plate main body 110.
[0065] Exemplarily, the peripheral portion of the plate body 110 comprises a plurality of connection surfaces connected in sequence, the insert group corresponds to at least two adjacent connection surfaces, and at least one insert 120 corresponding to the insert group is arranged on each connection surface. For example, the insert group corresponds to two adjacent connection surfaces, and two inserts 120 are arranged on each connection surface. One of the third conductive segments 134 corresponding to the same insert group and located in the middle is electrically connected to the second end of the corresponding second conductive segment 133.
[0066] In some embodiments, as shown in the drawings, Figure 6 The plate body 110 can be designed in a split manner, specifically, the plate body 110 comprises a first plate 111 and a second plate 112, and the insert 120 and the conductive member 130 are arranged between the first plate 111 and the second plate 112.
[0067] Exemplarily, the first plate 111, the second plate 112 and the insert 120 can be fixed together by means of adhesion.
[0068] In a feasible implementation, to prevent the deformation of the plate body 110 from causing damage to the conductive member 130, a channel is formed between the first plate 111 and the second plate 112 to accommodate the conductive member 130, and a gap is formed between the conductive member 130 and the channel. Of course, the conductive member 130 can also be fixed together with the first plate 111 and the second plate 112 by means of adhesion.
[0069] In a feasible implementation, the first plate 111 comprises a first annular surface 1111 and a convex surface 1112 located inside the first annular surface 1111, the second plate 112 comprises a second annular surface 1121 and a concave surface 1122 located inside the second annular surface 1121, the first annular surface 1111 is in close contact with the second annular surface 1121, and the convex surface 1112 is in close contact with the concave surface 1122. In this embodiment, the design of the convex surface 1112 and the concave surface 1122 can increase the contact area of the first plate 111 and the second plate 112, so that the connection between the first plate 111 and the second plate 112 is firm and reliable. The design of the convex surface 1112 and the concave surface 1122 can also realize the positioning between the first plate 111 and the second plate 112, effectively guarantee the connection precision between the first plate 111 and the second plate 112, and facilitate the connection between the first plate 111 and the second plate 112.
[0070] Exemplarily, the second annular surface 1121 is provided with a plurality of accommodation grooves 1123 corresponding to the inserts 120 one by one, and the inserts 120 are arranged in the corresponding accommodation grooves 1123. In this embodiment, the inserts 120 can be embedded when the second plate 112 is injection molded, so as to guarantee the connection strength between the inserts 120 and the second plate 112. Of course, the accommodation grooves 1123 can also be spliced by the grooves on the first annular surface 1111 and the second annular surface 1121.
[0071] With reference to Figure 1 and Figure 7 As shown in
[0072] In this embodiment, the core substructure further comprises two oppositely arranged fixing plates 220, the clamping plates 100 and the core group 210 are located between the two fixing plates 220, both ends of the fixing plate 220 are provided with threaded members (not shown), and the threaded members are threadedly connected with the inserts 120 on the clamping plates 100. In this embodiment, the clamping plates 100 are relatively fixed with respect to the fixing plates 220, and the two fixing plates 220 can ensure that the two clamping plates 100 uniformly extrude the core group 210, thereby ensuring the quality of the core substructure.
[0073] Exemplarily, the threaded member can be a bolt.
[0074] Exemplarily, the fixing plate 220 includes but is not limited to an electrician's insulating paper board or a polypropylene plate.
[0075] Exemplarily, the fixing plates 220 can be arranged at intervals along the length direction of the clamping plates 100, that is, the fixing plates 220 are connected with the inserts 120 on the first connecting surfaces through the threaded members.
[0076] In a feasible implementation, first gaskets 230 are arranged between the clamping plates 100 and the core group 210, and the clamping plates 100 clamp the core group 210 through the two first gaskets 230. In this embodiment, the number or thickness of the first gaskets 230 can be adjusted to adjust the compression coefficient of the two clamping plates 100 on the core group 210, thereby ensuring the quality of the core substructure.
[0077] In a feasible implementation, as shown in Figure 7 and Figure 8 At least two adjacent capacitor elements are provided with second gaskets 240, the second gaskets 240 are provided with two through holes 241 corresponding to the fixing plates 220, and the fixing plates 220 are arranged in the through holes 241. In this embodiment, the second gaskets 240 can constrain the fixing plates 220 to prevent the fixing plates 220 from deforming, thereby ensuring the quality of the core substructure.
[0078] With reference to Figure 1 , Figure 7 and Figure 9As shown, the embodiment also provides a transformer, which comprises the insulating shell 310 and the at least one core structure 200 described above, and the core structure 200 is arranged in the insulating shell 310. In the embodiment, the transformer has good partial discharge performance by arranging the core structure 200.
[0079] Exemplarily, when the transformer comprises a plurality of core structures 200, the plurality of core structures 200 can be arranged along the parallel direction of the capacitive elements, and the plurality of core structures 200 are connected together in series through the connecting sheet 320.
[0080] Exemplarily, the bolts connecting the inserts 120 of the clamping plates 100 of the two adjacent core structures 200 towards each other can press the electrode sheets of the capacitive elements at the end of the core group 210 to the clamping plates 100 through the pressing plate. Exemplarily, the pressing plate can press the electrode sheets to the inserts 120 on the second connecting surface of the clamping plates 100.
[0081] Obviously, the above-mentioned embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the present application. Here, it is unnecessary and impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A clamp plate for clamping a core pack (210) consisting of a plurality of capacitive elements, characterized in that The clamp plate comprises: a plate body (110); a plurality of inserts (120) arranged at intervals on the periphery of the plate body (110); a conductive member (130) embedded in the plate body (110), the conductive member (130) being electrically connected to all the inserts (120), and all the inserts (120) being set at the same potential through the conductive member (130).
2. The splint of claim 1, wherein The conductive member (130) comprises a first conductive segment (131), and the first conductive segment (131) is arranged between two adjacent inserts (120). One of the two adjacent inserts (120) is electrically connected to the first end of the corresponding first conductive segment (131), and the other is electrically connected to the second end of the corresponding first conductive segment (131).
3. The splint of claim 1, wherein The periphery of the plate body (110) is provided with at least two insert groups, and each insert group comprises at least one insert (120). The conductive member (130) comprises a conductive ring (132) and at least two second conductive segments (133) arranged at intervals around the conductive ring (132). The second conductive segments (133) are arranged one-to-one with the insert groups. The first end of the second conductive segment (133) is electrically connected to the conductive ring (132), and the second end of the second conductive segment (133) is electrically connected to all the inserts (120) in the corresponding insert group.
4. The splint of claim 3, wherein, The second end of the second conductive segment (133) is electrically connected to the insert (120) one-to-one. Alternatively, the insert group comprises at least two inserts (120), and the second end of the second conductive segment (133) is provided with at least two branch segments (1331). The branch segment (1331) is electrically connected to the insert (120) of the corresponding insert group one-to-one. Alternatively, the conductive member (130) further comprises a third conductive segment (134). The insert group comprises at least three inserts (120). The third conductive segment (134) is arranged between two adjacent inserts (120) in the insert group. One of the two adjacent inserts (120) in the insert group is electrically connected to the first end of the corresponding third conductive segment (134), and the other is electrically connected to the second end of the corresponding third conductive segment (134). At least one of the third conductive segments (134) electrically connected to the same insert group is electrically connected to the second end of the corresponding second conductive segment (133).
5. Splint according to any one of claims 1-4, characterized in that The conductive member (130) is a wire or a conductive strip.
6. A core structure characterized by, It comprises: two clamp plates (100) as claimed in any one of claims 1-5; a core group (210) comprising a plurality of capacitive elements arranged side by side, the core group (210) being clamped between the two clamp plates (100) along the side-by-side direction of the capacitive elements.
7. The core structure of claim 6, wherein, Two opposite fixed plates (220) are further included, the clamping plate (100) and the core group (210) are located between the two fixed plates (220), and threaded members are arranged at both ends of the fixed plate (220) and are in threaded connection with the embedded members (120) on the clamping plate (100).
8. The core structure of claim 7, wherein, A first gasket (230) is arranged between the clamping plate (100) and the core group (210).
9. The core structure of claim 7, wherein, A second gasket (240) is arranged between at least two adjacent capacitor elements, and the second gasket (240) is provided with two through holes (241) corresponding to the fixed plates (220), and the fixed plates (220) are arranged in the through holes (241).
10. A transformer, characterized by Comprise: An insulating shell (310); At least one core substructure as claimed in any one of claims 6-9, which is arranged in the insulating shell (310).