CN108538545A - Mutual inductor and its closure cover plate assembly - Google Patents

Abstract

The invention relates to a transformer and its plugging cover plate assembly. The transformer includes a busbar bushing, the busbar bushing has a busbar perforation for the busbar to pass through, and the end of the busbar bushing is equipped with a sealing There are at least two blocking cover plates for blocking the perforation of the busbar, and each of the sealing coverplates encloses a perforation hole for the busbar to pass through. More than two plugging covers enclose the holes for the busbars to pass through. When the plugging covers are damaged, there is no need to move the busbars, just remove the damaged blocking covers and replace them. , which solves the problem of inconvenient replacement of the blocking cover plate in the prior art. In addition, it only needs to replace the damaged blocking cover plate, and it is not necessary to replace all the blocking cover plates blocked on the busbar bushing, and the undamaged blocking cover plate can continue to be used, which reduces the board cost.

Description

Transformer and its plugging cover assembly

technical field

The invention relates to a transformer and its blocking cover assembly.

Background technique

At present, there are two installation methods for the busbar bushing type current transformer in the switch cabinet: one is fixed on the metal frame in the cabinet, and the other is fixed on the side panel of the switch cabinet. In order to meet the requirements of metering, measurement and protection functions, multiple windings are often wound on a transformer, coupled with the user's large-capacity requirements, which directly leads to a larger shape of the transformer, so the installation on the side panel of the cabinet is adopted. The method will cause part of the transformer to be exposed outside the switch cabinet. If the exposed part of the transformer is not blocked, the dust in the environment will enter the transformer or switch cabinet from the through hole of the transformer, and accumulate on the surface of the transformer product or in the switch cabinet to form a layer filth. When encountering weather such as fog, dew, and drizzle, the conductance will increase, and the insulation performance will decrease, and the transformer is prone to leakage, which will cause certain safety hazards to the normal operation of power equipment.

The authorized announcement number is CN207097649U, and the Chinese patent whose authorized announcement date is 2018.03.13 discloses a current transformer and a plugging cover. The current transformer includes a busbar bushing, one end of the busbar bushing is connected to the cabinet body, and the other end of the busbar bushing is provided with a plugging cover, and the plugging cover is provided with a plug for the bus bar. Holes and connecting structures for connection with busbar bushings. The connecting structure includes mounting holes arranged on the blocking cover plate and bolts for mating connection with the mounting holes. The plugging cover plate is fixedly connected with the end of the transformer, so that dust and moisture are not easy to enter the switch cabinet through the end position, ensuring the safe operation of the power grid. However, when the transformer is installed and fixed, if the blocking cover is damaged, the bus bar installed in the through hole needs to be pulled out, and then the plugging cover is replaced and the bus bar is put on. The replacement steps of the plugging cover are cumbersome and the replacement of the plugging cover is inconvenient.

Contents of the invention

The purpose of the present invention is to provide a transformer to solve the problem of inconvenient replacement of the blocking cover in the prior art; the purpose of the present invention is also to provide a blocking cover assembly that solves the above problems.

The technical scheme of transformer of the present invention is:

The transformer includes a busbar bushing, the busbar bushing has a busbar perforation for the busbar to pass through, and the end of the busbar bushing is equipped with a plugging cover to block the busbar perforation, and the plugging cover There are at least two plates, and each blocking cover plate encloses a through hole for the busbar to pass through.

The beneficial effects of the present invention are: more than two blocking cover plates encircle the piercing holes for busbars to pass through. The plate can be removed for replacement, which solves the problem of inconvenient replacement of the blocking cover plate in the prior art. In addition, it only needs to replace the damaged blocking cover plate, and it is not necessary to replace all the blocking cover plates blocked on the busbar bushing, and the undamaged blocking cover plate can continue to be used, which reduces the board cost.

In order to facilitate the connection between the blocking cover plates and the busbar bushings, the adjacent blocking cover plates in this scheme can be detachably connected. When connecting the plugging covers and busbar bushings, you can first connect the plugging covers, and then connect the completed plugging covers with the busbar bushings, and complete each plugging cover in one pass. The connection with the busbar bushing is convenient for the connection of the plugging cover plate and the busbar bushing.

In order to facilitate the connection between the blocking cover plates, grooves and bumps are respectively provided on the two connecting ends of the blocking cover plate and the adjacent blocking cover plates in this plan, and the grooves and The projections of the adjacent blocking cover plates are snap-fitted, and the projections are snap-fitted with the grooves of the adjacent blocking cover plates. The blocking cover plate is clamped and connected with the protrusion through the groove, and the connection and disassembly are convenient.

In order to ensure the tightness of the junction between the plugging cover and the busbar bushing, the plugging cover in this solution is connected to the shielding sleeve of the busbar bushing, and the blocking cover is matched with the end face of the shielding sleeve. The blocking cooperation between the blocking cover plate and the end of the shielding sleeve can effectively ensure the sealing of the joint between the sealing cover plate and the busbar bushing, prevent dust and moisture from entering the transformer from the joint, and ensure the protection level of the switchgear.

In order to facilitate the connection between the plugging cover plate and the busbar bushing, snap holes are provided on the wall of the bus bar perforation described in this solution, and snap holes for snap connection with the snap hole are provided on the plugging cover plate. Through the connection between the buckle and the buckle hole, it is convenient to connect and disassemble the plugging cover plate and the busbar bushing.

In order to increase the versatility of each blocking cover plate, there are two blocking cover plates in this solution, and the two blocking cover plates are symmetrical about the axis center of the busbar bushing. In this way, the structures of each sealing cover plate are the same, and only one kind of sealing cover plate needs to be processed.

In order to ensure that the heat generated during the working process of the transformer can be discharged in time, the plugging cover plate described in this solution is provided with cooling holes. The heat generated when the transformer is working can be dissipated to the outside through the cooling holes to ensure the normal operation of the transformer.

The technical scheme of the plugging cover assembly of the present invention is:

The blocking cover plate assembly includes at least two blocking cover plates, and each blocking cover plate encloses a through hole for the busbar to pass through.

The adjacent blocking cover plates are detachably connected.

Grooves and bumps are respectively provided on the two connecting ends of the plugging cover plate connected to the adjacent blocking cover plate, and the grooves are engaged with the bumps of the adjacent blocking cover plate, and the convex The block is engaged with the groove of the adjacent blocking cover plate.

The blocking cover plate is provided with buckles for buckle connection with the buckle holes through which the busbar is perforated.

There are two blocking covers, and the two closing covers are symmetrical about the axis of the blocking cover assembly.

The blocking cover plate is provided with cooling holes.

Description of drawings

Fig. 1 is the structural representation of the specific embodiment of transformer of the present invention;

Fig. 2 is a schematic structural view of the busbar bushing in Fig. 1;

Fig. 3 is a schematic structural diagram of the shielding sleeve in Fig. 1;

Fig. 4 is a schematic structural view of the plugging cover plate in Fig. 1;

Fig. 5 is A-A direction view among Fig. 4;

Fig. 6 is a structural schematic diagram when a blocking cover is connected to the transformer in Fig. 1;

In the figure: 1-busbar bushing, 2-first blocking cover, 3-second blocking cover, 4-bulge, 5-groove, 6-clip, 7-shielding sleeve, 8-card Button holes, 9-through row holes, 10-radiation holes, 11-bus bar perforations.

Detailed ways

Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

The specific embodiment of the transformer of the present invention, as shown in Figures 1 to 6, the transformer includes a bus bushing 1, the bus bushing 1 has a bus bar perforation 11 for the bus bar to pass through, and the end of the bus bushing 1 The upper part is equipped with a blocking cover plate for blocking the through hole 11 of the bus bar. There are two plugging covers in this embodiment, which are respectively the first blocking cover 2 and the second blocking cover 3, and the first blocking cover 2 and the second blocking cover 3 form a The piercing hole 9 through which the busbar passes. In other embodiments, more than three blocking cover plates can be provided, and it is only necessary to ensure that each blocking cover plate encloses a through hole for the busbar to pass through. As shown in Figure 6, when the second blocking cover 3 is damaged, there is no need to move the bus bar, just remove the second blocking cover 3 for replacement, and there is no need to disassemble and replace the first blocking The cover plate 2 solves the problem of inconvenient replacement of the blocking cover plate in the prior art. In addition, it is only necessary to replace the damaged cover plate, and it is not necessary to replace all the cover plates blocked on the busbar bushing, and the undamaged cover plate can continue to be used, reducing the cost of the cost of.

As shown in FIG. 1 , the first sealing cover plate 2 and the second sealing cover plate 3 in this embodiment form a circular structure. In other embodiments, the two blocking cover plates can also be arranged at intervals, and at this time, there is a certain gap between the two blocking cover plates, which can be used for heat dissipation. The first blocking cover plate 2 and the second blocking cover plate 3 in this embodiment are symmetrical about the axis center of the busbar bushing 1, so that the structures of the two blocking cover plates are the same, and only one One plugging cover can be adapted to the first blocking cover 2 and the second blocking cover 3, and when replacing one of the blocking covers, each blocking cover has universality, eliminating the need to select Corresponding to the process of blocking the cover plate, increasing the replacement efficiency. In other embodiments, the structures of the two blocking cover plates may not be exactly the same, and it is only necessary to ensure that the two blocking cover plates enclose a through hole for the busbar to pass through. In order to facilitate the connection between the plugging cover plate and the busbar bushing 1, grooves 5 and bumps 4 are respectively provided on the two connecting ends of the first blocking cover plate 2 and the second blocking cover plate 3, and the second sealing cover plate A groove 5 and a bump 4 are also arranged on the blocking cover plate, and the groove 5 of the first blocking cover plate 2 is engaged with the bump 4 of the second blocking cover plate 3, and the first blocking cover plate 2 The protrusion 4 is engaged with the groove 5 of the second blocking cover plate 3 . The arrangement of the groove 5 and the protrusion 4 not only facilitates the connection between the plugging cover plate and the busbar bushing 1, but also facilitates the connection and disassembly between the two blocking cover plates, thereby facilitating the replacement of the blocking cover plate. In other present embodiments, the two plugging covers can be connected by bolts or buckles; the two blocking covers can also be fixed by bonding; Connect each blocking cover plate with the busbar bushing.

As shown in Figures 2 to 5, the bus bar perforation 11 is surrounded by the shielding sleeve 7 of the bus bushing 1, and the blocking cover plates in this embodiment are connected to the shielding sleeve 7, and each blocking cover plate and the shielding sleeve The end face of 7 is matched to ensure the tightness of the joint between the plugging cover plate and the bus bushing 1, prevent dust and moisture from entering the transformer from the joint, and ensure the protection level of the switch cabinet. The side wall at one end of the shielding sleeve 7 is uniformly provided with four buckle holes 8 along the circumferential direction, and two buckle holes 6 which are buckle-connected with the buckle holes 8 are respectively arranged on the two sealing cover plates. When connecting the blocking cover plate and the shielding sleeve 7, first connect the two blocking cover plates with the protrusion 4 through the groove 5, and then close the buckle 6 of the blocking cover plate to the bottom of the shielding sleeve 7 The inner wall is slowly placed on the end of the transformer, so that the buckle 6 on the blocking cover just snaps into the buckle hole 8 on the shielding sleeve 7, and at the same time, the blocking cover and the end face of the shielding sleeve 7 are stopped and matched, Then put the busbar in the piercing hole 9 ; or put the busbar in the piercing hole 9 first, and then connect the blocking cover plate with the shielding sleeve 7 . It should be noted that, in order to ensure the protection level of the switchgear, the two ends of the shielding sleeve 7 in the axial direction in this embodiment are provided with buckle holes 8, and the two ends are connected with the above-mentioned blocking cover plate. In an embodiment, the blocking cover may also be connected only at one end of the shielding sleeve.

The piercing hole 9 can be designed according to the size of the busbar selected by the user to ensure that the busbar just passes through the piercing hole 9 without leaving too much gap, thereby meeting the requirements for the protection level of the switchgear. The plugging cover is made of ABS injection molding, which is relatively light, and the color is consistent with the color of the busbar bushing. After the plugging cover is blocked, the two seem to be integrated, which is more beautiful. In other embodiments, the blocking cover plate can also be connected to the peripheral parts of the shielding sleeve of the busbar bushing; the blocking cover plate can also be provided with a connecting surface connected to the shielding sleeve, and the connecting surface and the inner wall of the shielding sleeve interfere Cooperate to ensure the connection between the blocking cover plate and the shielding sleeve; the blocking cover plate can also be poured and formed with resin materials. In addition, the circumference of the blocking cover plate is provided with a rounded corner structure. The plugging cover plate is also provided with cooling holes 10, through which the heat generated by the transformer is dissipated to the outside through the cooling holes 10, so as to ensure the normal operation of the transformer. In other embodiments, no cooling holes may be provided on the blocking cover plates; or the cooling holes may be formed by the gap between two blocking cover plates.

A specific embodiment of the blocking cover plate assembly of the present invention, the blocking cover plate assembly in this embodiment includes at least two blocking cover plates, and the blocking cover plate is the same as that described in the specific embodiment of the above transformer The structure of the plugging cover plate is the same and will not be repeated here.

Claims (10)

1. there is the bus-bar passed through for bus-bar to perforate mutual inductor, including bus casing, on the bus casing, feature It is that configured with the closure cover board for blocking bus-bar perforation, the closure cover board is equipped at least two for the end of the bus casing, Each closure cover board is surrounded wears round for what bus-bar passed through.

2. mutual inductor according to claim 1, characterized in that releasable connection between adjacent closure cover board.

3. mutual inductor according to claim 2, characterized in that connect with adjacent closure cover board on the closure cover board Groove and convex block are respectively equipped on two connecting pins, the groove is engaged by clamping with the adjacent convex block for blocking cover board, convex block and phase The groove that neighbour blocks cover board is engaged by clamping.

4. according to the mutual inductor described in any one of claim 1-3, characterized in that the closure cover board is connected to bus sheath On the housing of pipe, and the end face block for blocking cover board and housing coordinates.

5. according to the mutual inductor described in any one of claim 1-3, characterized in that set on the hole wall of the bus-bar perforation There is block button hole, blocks cover board and be equipped with the buckle snapped connection with block button hole.

6. according to the mutual inductor described in any one of claim 1-3, characterized in that the closure cover board is equipped with two, two A closure cover board is symmetrical about the axis centre of bus casing.

7. according to the mutual inductor described in any one of claim 1-3, characterized in that the closure cover board is equipped with heat dissipation Hole.

8. blocking cover plate assembly, characterized in that including at least two block cover boards, it is each block cover board and surround passed through for bus-bar Wear round.

9. closure cover plate assembly according to claim 8, characterized in that releasable connection between adjacent closure cover board.

10. closure cover plate assembly according to claim 9, characterized in that on the closure cover board with adjacent capping Groove and convex block are respectively equipped on two connecting pins of plate connection, the groove is engaged by clamping with the adjacent convex block for blocking cover board, Convex block is engaged by clamping with the adjacent groove for blocking cover board.