CN204333736U - Integrated solid insulation pole - Google Patents

Abstract

The utility model discloses integrated solid insulation pole, comprise the pole body of sealing module in aggregates, busbar joint and cable joint; The one side that pole body is connected with operating mechanism is provided with pole shrouding, container cavity is formed between pole body and pole shrouding, container cavity is divided into independently vacuum switch cavity and isolating switch cavity by insulation board, be provided with the vacuum switch assembly be electrically connected with busbar joint in vacuum switch cavity, in isolating switch cavity, be provided with the switch component be electrically connected with cable joint; The every phase pole of this product makes absolute construction, and busbar joint and cable joint and pole body are one overall, without any insulation segmentation contact, ensure that the insulation property of switch excellence; And vacuum switch and isolating switch are separately positioned on absolutely in separate cavity, edge performance is independent of each other, and does not have space crossed layout between electric-conductor, and the Electric Field Distribution of switch is simply even, and office puts little.

Description

Integrated solid insulation pole

technical field

The utility model relates to high-voltage electrical products, in particular to solid insulating poles in high-voltage electrical products.

Background technique

With the State Grid's efforts to promote solid insulation switch products in recent years, the number of manufacturers of solid insulation products on the market has gradually increased, and the product structure is also diverse, but these products also have the following common problems:

1. The poles share a box-type structure, and the insulation distance between phases is short. Structural phase-to-phase insulation problems or even short circuits are prone to occur, resulting in product operation safety accidents, and cannot be repaired individually, requiring the entire product to be replaced.

2. There is no separate compartment for the isolation and grounding three-position switch and the vacuum switch. The arc generated by the grounding switch will be sprayed on the arc extinguishing chamber and the insulating rod when it is closed, resulting in electrical corrosion, resulting in a decrease in the insulation performance of the vacuum switch. affect the service life of the product.

3. There are 6 to 7 insulating connection ports on the switch body, which are also sealed ports. When the product is installed, it is easy to be unevenly stressed, and the structural stress on the insulating parts will be relatively concentrated, and the partial discharge will be large; the number of connecting ports and sealing ports There are many problems, and there are correspondingly many problems, which will have a negative impact on the insulation performance of the product during long-term operation.

4. The current transformer on the line must be installed on the cable during installation. Once there is a problem with the current transformer, the cable connector and cable accessories need to be destroyed, and the time and investment for maintenance and power supply again are very large.

5. Only the light source outside the cabinet or no light source shines into the isolation observation window. The state of the isolation switch cannot be observed clearly or even the state of the isolation switch. The observation window is just a decoration.

6. The connection structure of the isolating switch is complicated, and it needs to be installed with multiple parts such as conductive blocks, soft connections, connectors, pads, etc. The installation is complicated and suitable for manual installation, but it is difficult for automatic manipulators to install.

In addition, when multiple functions or performance parameters are required, such as A phase, B phase, and C phase interchange, 12kV, 24kV, circuit breaker, load switch function and load switch-fuse combination electrical function, and switch poles need to manufacture ten sets Only molds with or above can be used for the production of each function or performance module, and the input cost is very high.

Contents of the invention

In view of the above problems, the utility model provides a small volume and independent installation of the phase-to-phase poles, each component and the pole body form a whole, and the insulation performance of the vacuum switch and the three-position (closing-opening-grounding) isolating switch does not affect each other , isolating switch and pole connection are integrated solid insulated poles for easy connection.

The technical scheme that the utility model adopts for solving its technical problem is:

The integrated solid insulated pole includes pole body, bus joint and cable joint, and is characterized in that the pole body, bus joint and cable joint are solidly sealed into an integral module.

As a further improvement of the above solution, a pole sealing plate is provided on the side of the pole body connected to the operating mechanism, and a housing cavity is formed between the pole body and the pole sealing plate, and the housing cavity is passed through an insulating plate. Divided into an independent vacuum switch cavity and an isolating switch cavity, the vacuum switch cavity is provided with a vacuum switch assembly electrically connected to the bus joint, and the isolating switch cavity is provided with an isolating switch electrically connected to the cable joint Assemblies, the vacuum switch assembly is electrically connected with the isolation switch assembly.

As a further improvement of the above solution, the pole body, the bus joint, the cable joint and the insulating plate are integrally formed.

Further, the vacuum switch assembly includes a vacuum interrupter and dynamic and static contacts arranged in the vacuum interrupter; the isolation switch assembly includes an isolated static contact, an isolation knife, and an isolated movable contact. The static contact in the room is electrically connected to the isolated static contact, the moving contact in the vacuum interrupter is electrically connected to the bus joint, the isolated moving contact is set on the pole sealing plate, and the isolating knife and The cable connector is electrically connected.

Further, the static contacts and isolated static contacts in the vacuum interrupter chamber are fixedly sealed on the inner side wall of the pole body.

As a further improvement of the above solution, a recessed installation groove is provided on the isolating switch cavity at the cable joint, and an isolating contact seat is arranged in the installation groove, and one end of the isolating contact seat is fixedly connected to the cable joint. The other end is pivotally connected with the isolation knife.

As a further improvement of the above solution, an observation window is provided at a position corresponding to the pole sealing plate and the isolating switch assembly.

As a further improvement of the above solution, an electro-display sensor is embedded in the cable connector.

As a further improvement of the above solution, an LED light source is built into the pole sealing plate above the observation window.

The beneficial effects of the utility model are: the integrated solid insulation pole of the utility model is small in size, the phase poles are installed independently, and each phase pole is made into an independent structure, and the pole busbar joint and the cable joint are integrated with the pole body , without any insulated segmented contacts, which ensures the excellent insulation performance of the switch;

Moreover, the vacuum switch and the three-position (close-open-ground) isolating switch are respectively arranged in independent cavities, the insulation performance does not affect each other, there is no space cross arrangement between the conductive parts, the electric field distribution of the switch is simple and uniform, Put small, solve the insulation and partial discharge problems between the vacuum switch and the isolating switch;

Further, an observation window is provided on the pole sealing plate of the isolating switch cavity and an LED light source is provided inside the cavity, through which the state of the isolating switch can be clearly seen;

Further, the dynamic and static contacts of the isolating switch are respectively installed on the opposite sides of the isolating cavity, the isolating knife is installed on the isolating seat, and the isolating seat is installed in the groove of the cavity for positioning. The installation process does not require any adjustment and tooling, which is convenient Manpower and automatic manipulators are used for assembly, and the connection structure is simple.

In addition, when multiple functions or performance parameters are required, such as A-phase, B-phase, and C-phase exchange, 12kV, 24kV, circuit breaker, load switch function and load switch-fuse combination electrical function, switch pole only needs to be replaced The sliders for busbar joints, cable bushings and arc extinguishing chambers of different specifications are sufficient. The size and structure of other parts do not change. Only one set of molds is required to complete the replacement and processing of various functional and performance components. Greatly reduce manufacturing costs.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following will briefly describe the accompanying drawings that are used in the description of the embodiments. Apparently, the drawings described are only a part of the embodiments of the utility model, rather than all the embodiments. Those skilled in the art can also obtain other design schemes and drawings based on these drawings without creative work. :

Fig. 1 is the front sectional view when the isolating switch of the embodiment of the utility model is opened;

Fig. 2 is a structural schematic diagram of the cable joint and the bottom of the pole body of the utility model.

Detailed ways

Referring to Figures 1 and 2, high-voltage electrical products are usually equipped with A, B, and C three-phase poles. The traditional three-phase poles are usually in a box-type structure, and the insulation distance between phases is short. Structural phase-to-phase insulation problems or even short circuits are prone to occur. , resulting in product operation safety accidents, and cannot be repaired separately, the whole product needs to be replaced; the integrated solid insulation pole of the utility model is a single-phase independent structure including a pole body 1, a bus joint 3 and a cable joint 4, The pole body 1, bus joint 3 and cable joint 4 are sealed into an integral module. The pole bus joint and cable joint are integrated with the pole body without any insulating segmented contacts, which ensures the excellent insulation performance of the switch. When there are multi-phase poles, each phase has a cost-effective and innovative independent structure, and the poles of each phase are installed independently to solve the problem of insulation between phases of the product and avoid the occurrence of arcing accidents between phases.

Further, the side of the pole body 1 connected to the operating mechanism is provided with a pole sealing plate 2, a housing cavity is formed between the pole body 1 and the pole sealing plate 2, and the housing cavity passes through an insulating plate 5 Divided into independent vacuum switch cavity 11 and isolating switch cavity 12, the vacuum switch cavity 11 is provided with a vacuum switch assembly electrically connected to the bus joint 3, and the isolating switch cavity 12 is provided with a cable The isolating switch assembly electrically connected with the joint 4, the vacuum switch assembly is electrically connected with the isolating switch assembly, wherein the pole body 1, the bus joint 3, the cable joint 4 and the insulating plate 5 are integrally formed; when isolating When the switch is in the off state, the cable joint end is charged, and when the vacuum switch assembly is at zero potential, the accommodating cavity is divided into two independent cavities by the epoxy resin of the pole, and the insulation of the epoxy resin cannot be destroyed between the two. There is no problem of electrical breakdown,

Further, the vacuum switch assembly includes a vacuum interrupter 111 and dynamic and static contacts 112 and 113 arranged in the vacuum interrupter 111; the isolation switch assembly includes an isolation static contact 121, an isolation knife 122 and an isolation dynamic Contact 123, the static contact 113 in the vacuum interrupter is electrically connected to the isolated static contact 121, the movable contact 112 in the vacuum interrupter is electrically connected to the bus joint 3, and the isolated movable contact 123 is set on the pole sealing plate 2, and the isolation knife 122 is electrically connected with the cable joint 4, wherein the static contact 113 and the isolation static contact 121 in the vacuum interrupter chamber are solidly sealed in the pole body 1 on the inner side wall of epoxy resin, not only realizes fixed installation, but also plays an effective insulation role at the same time.

Further, the isolating switch cavity 12 located at the cable joint 4 is provided with a concave mounting groove 114, and an isolating contact seat 124 is arranged in the mounting groove 114, and one end of the isolating contact seat 124 is connected to the cable joint 4 fixed connection, and the other end is pivotally connected with the isolation knife 122. Put the isolation contact 124 into the mounting groove 114 of the pole, and fix it on the copper insert of the cable sleeve with screws. The mounting groove 114 is concave, so that the isolation contact 124 can be positioned at once when it is installed. , the size of the four sides of the installation groove 114 is a few tenths of a millimeter larger than the size of the isolation contact seat. After positioning, the limit can be made immediately. The installation process does not require any adjustment and tooling. The assembly can be easily completed by tightening the screws. Manual installation High efficiency, also very suitable for assembly with fully automatic installation manipulator.

Further, an observation window 6 is provided at the position corresponding to the pole sealing plate 2 and the isolating switch assembly, and an LED light source is built into the pole sealing plate 2 above the observation window 6; the light source of the observation port is designed inside the pole, so that People can clearly see the state of the isolating switch when observing.

In order to detect whether the conductor is electrified, an electro-display sensor 41 is embedded in the cable connector 4 . If a current transformer needs to be provided, the current transformer can be directly set on the cable connector, and the current transformer can be maintained or replaced by pulling out the cable connector.

The above is a specific description of the preferred implementation of the present utility model, but the present invention is not limited to the described embodiments, and those skilled in the art can also make various equivalent deformations or modifications without violating the spirit of the present utility model. Replacement, these equivalent modifications or replacements are all included within the scope defined by the claims of the present application.

Claims (9)

1. Integrated solid insulated pole, including pole body (1), bus joint (3) and cable joint (4), characterized in that: the pole body (1), bus joint (3) and cable joint (4) Sealed into a whole module. 2. The integrated solid insulated pole according to claim 1, characterized in that: the side of the pole body connected to the operating mechanism is provided with a pole sealing plate (2), and the pole body (1) is connected to the An accommodating cavity is formed between the pole sealing plates (2), and the accommodating cavity is divided into an independent vacuum switch cavity (11) and an isolating switch cavity (12) by an insulating plate (5). The body (11) is provided with a vacuum switch assembly electrically connected to the bus joint (3), and the isolation switch cavity (12) is provided with an isolation switch assembly electrically connected to the cable joint (4). The switch assembly is electrically connected with the isolation switch assembly. 3. The integrated solid insulated pole according to claim 2, characterized in that: the vacuum switch assembly includes a vacuum interrupter (111) and dynamic and static contacts arranged in the vacuum interrupter (111) (112, 113); the isolating switch assembly includes isolating static contacts (121), isolating knives (122) and isolating moving contacts (123), and the static contacts (113) in the vacuum interrupter chamber and isolating static The contact (121) is electrically connected, the moving contact in the vacuum interrupter is electrically connected to the bus joint (3), the isolated moving contact (123) is arranged on the pole sealing plate (2), and the The isolation knife (122) is electrically connected with the cable connector (4). 4. The integrated solid insulating pole according to claim 2, characterized in that: the pole body (1), bus joint (3), cable joint (4) and insulating plate (5) are integrally formed . 5. The integrated solid insulated pole according to claim 3, characterized in that: the static contact (113) and the isolated static contact (121) in the vacuum interrupter are sealed in the pole body (1) on the inner wall. 6. The integrated solid insulated pole according to claim 3, characterized in that: the isolating switch cavity (12) at the cable joint (4) is provided with a concave installation groove, and the installation groove An isolation contact seat (124) is arranged inside, one end of the isolation contact seat (124) is fixedly connected to the cable connector (4), and the other end is pivotally connected to the isolation knife (122). 7. The integrated solid insulated pole according to claim 2, characterized in that: the pole sealing plate (2) is provided with an observation window (6) at a position corresponding to the isolating switch assembly. 8. The integrated solid insulated pole according to claim 1, characterized in that: an electro-display sensor (41) is embedded in the cable connector (4). 9. The integrated solid insulating pole according to claim 7, characterized in that an LED light source is built into the pole sealing plate (2) above the observation window (6).