An equal potential core clamp plate for capacitor voltage transformer installation

Abstract

The application relates to an equal-potential core clamping plate for installing a capacitive voltage transformer, which belongs to the technical field of capacitors and comprises a clamping plate body, a binding belt groove, a binding belt, a brass insert, a fastening screw, a conductor ring, a connecting screw, a recessed groove and a buffer ring. The brass insert is integrally cast in the clamping plate body, effectively improving the fixing stability of the brass insert to the binding belt. The fastening operation of the clamping plate body and the binding belt is simple, effectively improving the bundling efficiency of the capacitive core stacking module. The multiple brass inserts are connected in series through the conductor ring, so that they are at the same potential, thereby reducing the potential difference between different insert tubes and reducing the discharge risk, and further effectively improving the electrical performance of the stacked capacitive core module. The brass insert is integrally connected in series with the conductor ring, effectively improving the integrally cast manufacturing of the brass insert and the clamping plate body, and facilitating the mass production and processing of the clamping plate body.

Description

TECHNICAL FIELD

[0001] The present application relates to an equipotential core clamp plate, in particular to an equipotential core clamp plate for installing a capacitive voltage transformer. BACKGROUND

[0002] The capacitive core stack module binding of the capacitive voltage transformer is a very critical manufacturing process link, and the purpose is to firmly bind a plurality of capacitive elements stacked in series into a mechanical whole, so as to ensure that the capacitive core stack module will not displace, deform or loosen during transportation, installation and operation, especially under the action of huge electric power generated by short-circuit current, thereby ensuring the electrical performance, mechanical strength and long-term operation reliability of the equipment.

[0003] Chinese patent CN110473709A discloses an "electricity core group, capacitive electricity core module", which adopts a whole type clamp plate, completely different from the laminated type, and has smaller size, completely solves the problems of difficult assembly, easy deformation of the electricity core and clamp plate, large size and the like of the laminated type module, improves the overall strength of the electricity core module, has better size precision, simplifies the assembly process, has higher assembly efficiency, and is suitable for production of medium batch electricity core modules.

[0004] The existing capacitive core stack module of the capacitive voltage transformer mostly adopts electrician insulating paper as the fixing material at both ends, because the electrician insulating paper has no rigidity, and the capacitive core binding is easy to loosen, which affects the binding stability of the capacitive core stack module. SUMMARY

[0005] In view of the above existing technology, the technical problem to be solved by the present application is that the electrician insulating paper has no rigidity, and the capacitive core binding is easy to loosen, which affects the binding stability of the capacitive core stack module.

[0006] To solve the above problems, the present application provides an equipotential core clamp plate for installing a capacitive voltage transformer, which comprises a clamp plate body located at both ends of a capacitive core stack module, a binding belt groove is formed on the outer surface of the clamp plate body, a binding belt is bound between the two clamp plate bodies, a brass insert is fixedly embedded in the edge of the clamp plate body, the brass insert corresponds to the outlet end of the binding belt groove, the exposed end of the brass insert is threadedly connected with a fastening screw, and the fastening screw penetrates the binding belt.

[0007] The inside of the clamping plate body is fixedly embedded with a conductor ring, the brass inserts are arranged in series with the conductor ring, and a connecting screw is threadedly connected between the inner embedded end of the brass insert and the conductor ring;

[0008] The edge of the clamping plate body is provided with a recessed groove corresponding to the exposed end of the brass insert, and a buffer ring is placed in the recessed groove between the binding belt and the exposed end of the brass insert.

[0009] In the above-mentioned equal-potential core clamping plate for capacitor voltage transformer installation, the brass inserts are integrally cast in the inside of the clamping plate body, effectively improving the fixing stability of the brass inserts to the binding belt, and the brass inserts are connected in series through the conductor ring, realizing that multiple brass inserts are in an equal-potential state and effectively reducing the discharge between the brass inserts, thereby effectively improving the electrical performance of the stacked capacitor core module.

[0010] As a further improvement of the present application, the clamping plate body is made of epoxy resin material, and the brass insert is made of brass material. The epoxy resin material has high bending strength and low water absorption, and the brass insert made of brass material has high structural strength.

[0011] As a further improvement of the present application, the two ends of the binding belt are fixed by overlapping welding, and the binding belt is made of stainless steel material. By overlapping and welding the two ends of the binding belt, the binding belt is arranged in a ring shape between the two clamping plate bodies, facilitating the installation and fixation of the binding belt.

[0012] As a further improvement of the present application, a threaded vertical embedding cylinder is also fixedly embedded at the top edge of the clamping plate body, a connecting screw is threadedly connected between the inner embedded end of the threaded vertical embedding cylinder and the conductor ring, and the threaded vertical embedding cylinder is made of brass material. By replacing the brass insert with the threaded vertical embedding cylinder, the binding belt is directly connected to the threaded vertical embedding cylinder, effectively reducing the length of the binding belt.

[0013] As a further improvement of the present application, the two ends of the binding belt are fixedly connected with assembly pieces, the middle part of the assembly piece is provided with a connecting hole, and a fastening screw is threadedly connected with the exposed end of the threaded vertical embedding cylinder through the connecting hole. The fastening screw is pressed against the assembly piece on the threaded vertical embedding cylinder through the connecting hole, effectively improving the connection stability of the binding belt and the threaded vertical embedding cylinder.

[0014] As a further improvement of the present application, the connecting hole is in a long strip shape, a pressing pad is arranged between the assembly piece and the fastening screw, and the assembly piece is made of stainless steel material. The pressing pad effectively increases the pressing area of the fastening screw on the assembly piece, further effectively improving the fastening stability of the assembly piece.

[0015] As further improvement of the present application, the protruding part is fixedly connected to the end of the binding belt away from the clamp block, the abutting gasket is sleeved between the top of the clamp block and the fastening screw, the end of the abutting gasket close to the protruding part is arranged in an inclined and curved manner, the bottom of the inclined end of the abutting gasket is in abutting connection with the root of the protruding part, and when the fastening screw is used to press and fix the clamp block, the originally inclined and curved abutting gasket is gradually flattened, the protruding part is pushed by the abutting gasket, and thus the binding belt is tightened, and the tension of the binding belt is effectively improved.

[0016] As further improvement of the present application, the clamp block is made of insulating rubber material, and the abutting gasket is made of stainless steel material, the clamp block made of insulating rubber material has good buffering capacity, and the abutting gasket made of stainless steel material has high structural strength.

[0017] In summary, the present application has the advantages that the brass insert is integrally cast in the clamp body, the combination strength of the brass insert and the clamp body is improved, the fixing stability of the binding belt is improved, the fastening operation of the clamp body and the binding belt is simple, the bundling efficiency of the capacitor core stacking module is effectively improved, the multiple brass inserts are connected in series through the conductor ring, the potential difference between the different inserts is reduced, the discharge risk is reduced, the electrical performance of the capacitor core stacking module is effectively improved, the brass insert is integrally connected with the conductor ring, the integrally cast manufacturing of the brass insert and the clamp body is improved, and the mass production of the clamp body is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 FIG. 1 is a perspective view of the clamp body of the first embodiment of the present application;

[0019] Figure 2 FIG. 2 is a sectional perspective view of the clamp body of the first embodiment of the present application;

[0020] Figure 3 FIG. 3 is a perspective view of the brass insert and the conductor ring of the first embodiment of the present application;

[0021] Figure 4 FIG. 4 is a perspective view of the clamp body and the binding belt in the bundling state of the first embodiment of the present application;

[0022] Figure 5 FIG. 5 is a perspective view of the clamp body with the recess groove of the second embodiment of the present application;

[0023] Figure 6 FIG. 6 is a sectional perspective view of the clamp body with the recess groove of the second embodiment of the present application;

[0024] Figure 7 FIG. 7 is a perspective view of the clamp body with the binding belt pressed into the recess groove of the second embodiment of the present application;

[0025] Figure 8 Fig. 3 is a perspective view of the clamp body of the threaded vertical insert of the third embodiment of the present application;

[0026] Figure 9 Fig. 4 is a sectional perspective view of the clamp body of the threaded vertical insert of the third embodiment of the present application;

[0027] Figure 10 Fig. 5 is a perspective view of the threaded vertical insert and the conductor ring of the third embodiment of the present application;

[0028] Figure 11 Fig. 6 is a perspective view of the threaded vertical insert fastening the binding strap of the third embodiment of the present application;

[0029] Figure 12 Fig. 7 is an enlarged sectional view of the fastening structure of the threaded vertical insert of the third embodiment of the present application;

[0030] Figure 13 Fig. 8 is a perspective view of the assembly piece of the third embodiment of the present application.

[0031] Explanation of Reference Numerals in the Drawings:

[0032] 1, clamp body; 101, binding strap groove; 102, binding strap; 103, brass insert; 104, fastening screw; 105, conductor ring; 106, connecting screw; 2, recessed groove; 201, buffer ring; 3, threaded vertical insert; 301, assembly piece; 302, connecting hole; 303, compression pad; 304, protruding portion; 305, abutting pad. DETAILED DESCRIPTION

[0033] The three embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0034] First Embodiment:

[0035] Figures 1 to 4The utility model discloses a kind of equal-potential core clamping plates for capacitor voltage transformer installation, including the clamping plate body 1 at the both ends of capacitor core stack module, bandage groove 101 is set on the outer surface of clamping plate body 1, two clamping plate bodies 1 are tied with banding tape 102, clamping plate body 1 is fixedly embedded with brass insert 103 inside the edge, brass insert 103 corresponds with the export end of bandage groove 101, the exposed end of brass insert 103 is threadedly connected with fastening screw 104, fastening screw 104 penetrates banding tape 102, conductor ring 105 is fixedly embedded in the inside of clamping plate body 1, brass insert 103 and conductor ring 105 are arranged in series, and connecting screw 106 is threadedly connected between the inlay end of brass insert 103 and conductor ring 105, clamping plate body 1 is made of epoxy resin material, brass insert 103 is made of brass material, epoxy resin material has high bending strength, and epoxy resin has low water absorption, and brass insert 103 made of brass material has high structural strength.

[0036] When clamping plate body 1 is used to bundle and fix capacitor core stack module, two clamping plate bodies 1 clamp the two ends of capacitor core stack module respectively, and then banding tape 102 is wound around bandage groove 101 on clamping plate body 1 to bundle, and then fastening screw 104 is used to fix banding tape 102 and brass insert 103, so that the bundling operation of banding tape 102 and clamping plate body 1 is simple, the bundling structure of capacitor core stack module is stable, the bundling efficiency of capacitor core stack module is effectively improved, and the electrical performance of capacitor core stack module is effectively improved by connecting multiple brass inserts 103 in series through conductor ring 105 so that they are at the same potential, thereby reducing the potential difference between different inserts and reducing the risk of discharge.

[0037] When clamping plate body 1 is prepared by casting, the series of brass insert 103 and conductor ring 105 is placed in the casting mold, and the exposed end of brass insert 103 is tightly attached to the inner wall of the casting mold, so that the epoxy resin poured into the brass insert 103 is effectively avoided, and the clamping plate body 1 made of epoxy resin has high bending strength and low water absorption compared with traditional electrical insulating paper.

[0038] Second embodiment:

[0039] Compared with the first embodiment, the recessed groove 2 is mainly added, and the specific added structure is as follows, and the remaining structure is consistent with the first embodiment.

[0040] Figures 5 to 7As shown, the edge of the clamping plate body 1 is provided with a recessed groove 2 corresponding to the exposed end of the brass insert 103, and the inside of the recessed groove 2 is placed with a buffer ring 201 between the binding belt 102 and the exposed end of the brass insert 103. The two ends of the binding belt 102 are overlapped and welded to be fixed, and the binding belt 102 is made of stainless steel material. By overlapping and welding the two ends of the binding belt 102, the binding belt 102 is annularly sleeved between the two clamping plate bodies 1, which facilitates the installation and fixation of the binding belt 102.

[0041] When the fastening screw 104 fixes the binding belt 102 and the brass insert 103, the binding belt 102 is pressed into the recessed groove 2 by adjusting the tightening degree of the fastening screw 104, and the compression adjustment of the buffer ring 201 is matched, so as to effectively realize the tight adjustment of the binding belt 102 and effectively adjust the tension of the binding belt 102.

[0042] Third embodiment:

[0043] Compared with the first embodiment, the threaded vertical embedding cylinder 3 is mainly used instead of the brass insert 103, and the specific newly added structure is as follows, and the remaining structure is consistent with the first embodiment.

[0044] Figures 8 to 12 As shown, the edge top of the clamping plate body 1 is also fixedly embedded with a threaded vertical embedding cylinder 3, and the inner embedded end of the threaded vertical embedding cylinder 3 is also threadedly connected with a connecting screw 106 between the conductor ring 105. The threaded vertical embedding cylinder 3 is made of brass material. The brass insert 103 is replaced by the threaded vertical embedding cylinder 3, the binding belt 102 is directly connected with the threaded vertical embedding cylinder 3, the use length of the binding belt 102 is effectively reduced, and the two ends of the binding belt 102 are fixedly connected with a connecting piece 301. The middle part of the connecting piece 301 is provided with a connecting hole 302. The fastening screw 104 is threadedly connected with the exposed end of the threaded vertical embedding cylinder 3 through the connecting hole 302. The fastening screw 104 is pressed on the threaded vertical embedding cylinder 3 through the connecting hole 302, which effectively improves the connection stability of the binding belt 102 and the threaded vertical embedding cylinder 3. The connecting hole 302 is in a strip shape. The connecting piece 301 and the fastening screw 104 are sleeved with a pressing pad 303. The connecting piece 301 is made of stainless steel material. The pressing pad 303 effectively improves the pressing area of the fastening screw 104 on the connecting piece 301, thereby further effectively improving the fastening stability of the connecting piece 301.

[0045] When the clamping plate body 1 fixedly embedded with the threaded vertical embedding cylinder 3 is used, the two clamping plate bodies 1 clamp the two ends of the capacitor core stacking module respectively, the binding belt 102 is directly connected with the threaded vertical embedding cylinder 3, the fastening screw 104 is pressed on the threaded vertical embedding cylinder 3 through the connecting hole 302, and compared with the first embodiment, the capacitor core stacking module is bundled with shorter binding belt 102.

[0046] Figure 12 and Figure 13 It is shown that the one end of the group joint piece 301 is fixedly connected with the protruding part 304 away from the binding belt 102, the top of the tight pressing pad 303 is sleeved with the abutting gasket 305 between the tight pressing pad 303 and the fastening screw 104, the one end of the abutting gasket 305 close to the protruding part 304 is arranged in an inclined and curved manner, the bottom of the inclined end of the abutting gasket 305 is abuttingly connected with the root of the protruding part 304, when the fastening screw 104 is used to compress and fix the group joint piece 301, the originally inclined and curved abutting gasket 305 is gradually flattened, the protruding part 304 is pushed by the abutting gasket 305, so that the binding belt 102 is tightened, the tension of the binding belt 102 is effectively improved, the tight pressing pad 303 is made of insulating rubber material, the abutting gasket 305 is made of stainless steel material, the tight pressing pad 303 made of insulating rubber material has good buffering capacity, the abutting gasket 305 made of stainless steel material has high structural strength;

[0047] When the fastening screw 104 is used to compress and fix the group joint piece 301 on the threaded vertical embedding cylinder 3 through the connecting hole 302, the tight pressing pad 303 is compressed by tightening the fastening screw 104, in the compression process of the fastening screw 104, the abutting gasket 305 is flattened from the inclined state, the end of the abutting gasket 305 pushes the protruding part 304, so that the binding belt 102 is tightened, and the tension of the binding belt 102 is improved.

[0048] In combination with the current actual demand, the above-mentioned embodiments adopted by the present application are not limited to the scope, various changes made within the knowledge range of the skilled person in the art without departing from the concept of the present application still fall within the protection scope of the present application.

Claims

1. An equal potential core clamp for a capacitor voltage transformer installation, characterized by: The utility model provides a kind of capacitor core stack module, including the clamping plate body (1) located at the both ends of capacitor core stack module, the outer surface of the clamping plate body (1) is equipped with bandage slot (101), two the clamping plate body (1) between binding has bandage (102), the edge inside of the clamping plate body (1) is fixedly embedded with brass insert (103), the outlet end of the brass insert (103) corresponds with bandage slot (101), the exposed end of the brass insert (103) is threadedly connected with fastening screw (104), and the fastening screw (104) penetrates bandage (102); The inside of the clamping plate body (1) is fixedly embedded with conductor ring (105), the brass insert (103) and conductor ring (105) are arranged in series, and a connecting screw (106) is threadedly connected between the inner embedded end of the brass insert (103) and the conductor ring (105); The edge of the clamping plate body (1) is equipped with recessed groove (2), the recessed groove (2) corresponds with the exposed end of the brass insert (103), and a buffer ring (201) is placed in the recessed groove (2), and the buffer ring (201) is between the bandage (102) and the exposed end of the brass insert (103); The edge top of the clamping plate body (1) is also fixedly embedded with threaded vertical embedded cylinder (3), the same connecting screw (106) is threadedly connected between the inner embedded end of the threaded vertical embedded cylinder (3) and the conductor ring (105), both ends of the bandage (102) are fixedly connected with a connecting piece (301), a connecting hole (302) is formed in the middle of the connecting piece (301), the fastening screw (104) penetrates the connecting hole (302) and is threadedly connected with the exposed end of the threaded vertical embedded cylinder (3), the connecting hole (302) is in a strip shape, a pressing pad (303) is sleeved between the connecting piece (301) and the fastening screw (104), one end of the connecting piece (301) away from the bandage (102) is fixedly connected with a protruding part (304), a resisting pad (305) is sleeved between the top of the pressing pad (303) and the fastening screw (104), one end of the resisting pad (305) close to the protruding part (304) is in an inclined and curved shape, and the inclined end bottom of the resisting pad (305) is in abutting connection with the root of the protruding part (304).

2. The equal potential core clamp plate for capacitor voltage transformer installation according to claim 1, characterized in that: The clamping plate body (1) is made of epoxy resin material, and the brass insert (103) is made of brass material.

3. The equal potential core clamp plate for capacitor voltage transformer installation according to claim 1, characterized in that: Both ends of the bandage (102) are overlapped and welded, and the bandage (102) is made of stainless steel material.

4. The equal potential core clamp plate for capacitor voltage transformer installation according to claim 1, characterized in that: The threaded vertical embedded cylinder (3) is made of brass material, and the connecting piece (301) is made of stainless steel material.

5. The equal potential core clamp plate for capacitor voltage transformer installation according to claim 1, characterized in that: The pressing pad (303) is made of insulating rubber material, and the resisting pad (305) is made of stainless steel material.

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