New insulator device for separated-phase enclosed bus and enclosed bus

Abstract

A new type of insulator device for isolated-phase enclosed busbars, comprising a support insulator and a bottom plate. The mounting surface of the support insulator is a special-shaped end face, and the support insulator is fixedly arranged on the bottom plate through the special-shaped end face. This structural design eliminates the metal inserts in the traditional insulator support structure. At the same time, in the present invention, the bottom plate is designed as an insulating bottom plate, and the insulator is mounted on the bottom plate through its special-shaped end face, and its assembly structure is completely insulated. In this way, the creepage distance of the insulator can be increased, the insulation performance of the entire insulator device can be enhanced, and the partial discharge amount can be reduced. Compared with the original structure, the present invention reduces the metal fittings for fixing the insulator and the sealing rings for sealing, which can reduce the structural cost and improve the assembly efficiency. The present invention also provides an enclosed busbar, which is provided with this new type of insulator device for isolated-phase enclosed busbars. The present invention increases the insulation height of the insulator, improves the insulation performance of the busbar, and improves the reliability of the safe operation of the busbar.

Description

Technical Field

[0001] The present invention relates to the technical field of power systems, and more specifically, to a novel insulator device for a separated-phase enclosed bus and an enclosed bus. Background Art

[0002] The metal-enclosed bus can be divided into a separated-phase enclosed bus and a common-box enclosed bus. The separated-phase enclosed bus is widely used in the outgoing line circuit of generators with a capacity of 50 MW or more and the branch circuits for company use. The separated-phase enclosed bus includes a packaging shell, and a conductor (bus) is fixed in the packaging shell through an insulator support structure.

[0003] Please refer to Figure 1 , Figure 1 , which is a schematic structural diagram of the insulator support structure in the prior art.

[0004] In the prior art, a typical insulator support structure is as follows: it includes parts such as a support insulator a, an elastic block b, a mushroom head fitting c, and a bottom plate d; the support insulator is fixed on the bottom plate d through a bolt e, and a sealing ring f is arranged on the contact surface between the support insulator a and the bottom plate d to improve the sealing performance of the installation of the support insulator a on the bottom plate d; a blind hole structure is arranged at the top of the support insulator a, and the elastic block b is loaded into the blind hole structure, and the mushroom head fitting c is assembled on the top of the elastic block b to hold the bus, thereby realizing the installation of the bus on the support insulator.

[0005] The traditional insulator support structure has the following problems: 1. The bottom plate, mushroom head fitting, and bolts are all made of metal materials. Especially the use of the mushroom head fitting and bolts will reduce the creepage distance of the support insulator and reduce the insulation performance of the insulator; 2. The bus is supported by the mushroom head fitting, and the bus contacts the mushroom head fitting. During the operation of the separated-phase enclosed bus, vibration will inevitably occur, and this vibration will cause friction between the mushroom head fitting and the bus and generate metal debris, and the metal debris will also reduce the insulation performance of the insulator; 3. A sealing ring is arranged between the support insulator and the bottom plate, so the sealing surface will increase, which poses higher requirements for installation. Summary of the Invention

[0006] In summary, how to improve the insulation performance of the insulator has become an urgent problem to be solved by those skilled in the art.

[0007] To solve the problems in the prior art, the present invention provides the following technical solutions:

[0008] The present invention provides a new type of insulator device for phase-separated enclosed busbars, including support insulators and a bottom plate. The end face of the support insulator for contacting the bottom plate is the installation surface, and the installation surface is a special-shaped end face. The surface shape of the side of the bottom plate for installing the support insulator is adapted to the shape of the special-shaped end face, and the support insulator is fixedly arranged on the bottom plate through the special-shaped end face.

[0009] Preferably, in the new type of insulator device for phase-separated enclosed busbars provided by the present invention, a mushroom head part is arranged on the support insulator, and an insulating contact layer with a hardness less than that of the busbar is arranged on the surface of the mushroom head part for contacting the busbar.

[0010] Preferably, the insulating contact layer is a sheet molding compound insulating contact layer.

[0011] Preferably, in the new type of insulator device for phase-separated enclosed busbars provided by the present invention, a mushroom head part is arranged on the support insulator, and the mushroom head fitting is an insulating mushroom head part with a hardness less than that of the busbar.

[0012] Preferably, the mushroom head part is a sheet molding compound mushroom head part.

[0013] Preferably, in the new type of insulator device for phase-separated enclosed busbars provided by the present invention, the bottom plate is an insulating bottom plate.

[0014] Preferably, in the new type of insulator device for phase-separated enclosed busbars provided by the present invention, mounting holes coaxial with the support insulator are arranged on the mounting surface; support columns inserted and matched with the mounting holes are arranged on the bottom plate.

[0015] Preferably, in the new type of insulator device for phase-separated enclosed busbars provided by the present invention, a mounting ring coaxial with the support insulator is arranged on the mounting surface and at the outer edge of the mounting hole, and a support groove inserted and matched with the mounting ring is arranged on the bottom plate.

[0016] Preferably, in the new type of insulator device for phase-separated enclosed busbars provided by the present invention, the mounting hole is a tapered hole extending from the mounting surface to the other end of the support insulator.

[0017] Preferably, the mounting hole is a stepped hole.

[0018] Preferably, in the new type of insulator device for phase-separated enclosed busbars provided by the present invention, the support insulator and the bottom plate are adhesively connected through insulating glue.

[0019] Preferably, in the new type of insulator device for phase-separated enclosed busbars provided by the present invention, the bottom plate is of an integral structure.

[0020] The present invention also provides a closed busbar, which includes the novel insulator device for the phase-isolated closed busbar as described above.

[0021] The beneficial effects of the present invention are as follows:

[0022] The present invention provides a new type of insulator device for a phase-isolated enclosed busbar, comprising a supporting insulator and a base plate, wherein the end face of the supporting insulator used for contacting the base plate is a mounting face, the mounting face is a special-shaped end face, the base plate is used for mounting a side face of the supporting insulator, and its surface shape is adapted to the shape of the special-shaped end face, and the supporting insulator is fixedly arranged on the base plate through the special-shaped end face.

[0023] In the new type of insulator device for phase-separated enclosed busbar provided by the present invention, the main improvement is: the mounting surface of the supporting insulator is designed as a special-shaped end face structure, and the fixed mounting of the supporting insulator on the bottom plate is realized through the special-shaped end face structure. The structural design removes the metal inserts in the traditional insulator supporting structure. At the same time, the present invention designs the bottom plate as an insulating bottom plate, and the insulator is installed on the bottom plate through its special-shaped end face. The assembly structure is completely insulated, which can increase the creepage distance of the insulator, enhance the insulation performance of the entire insulator device, and reduce the partial discharge. Compared with the original structure, the present invention reduces the use of hardware and sealing rings for fixing the insulator, which can reduce the structural cost and improve the assembly efficiency.

[0024] Another improvement of the present invention focuses on the improvement of the mushroom head part. Through structural design, the mushroom head part and the bus conductor can be insulated contact, which can improve the insulation performance of the insulator device. At the same time, the hardness of the part where the mushroom head part contacts the bus conductor is less than that of the bus conductor, which can reduce the friction between the mushroom head part and the bus conductor, and prevent the occurrence of metal debris due to bus vibration and friction during operation. At the same time, the insulation height is increased, the insulation performance of the bus is improved, and the reliability of safe operation of the bus is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. Among them:

[0026] Figure 1 It is a structural schematic diagram of an insulator support structure in the prior art.

[0027] exist Figure 1 In the figure, the reference numerals are described as follows:

[0028] Support insulator a, elastic block b, mushroom head fitting c, base plate d, bolt e, sealing ring f.

[0029] Figure 2This is a schematic structural diagram of a new type of insulator device for a separated-phase enclosed busbar in an embodiment of the present invention.

[0030] In Figure 2 the following is an illustration of the reference numerals:

[0031] Support insulator 1, bottom plate 2, mushroom head part 3, mounting hole 4, support column 5, mounting ring 6, elastic block 7. Detailed implementation manners

[0032] The present invention will be described in detail below with reference to the drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present invention rather than a limitation of the present invention. In fact, those skilled in the art will clearly understand that modifications and variations can be made to the present invention without departing from the scope or spirit of the present invention. For example, features shown or described as part of one embodiment can be used in another embodiment to yield yet another embodiment. Therefore, it is desirable that the present invention includes such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0033] In the description of the present invention, the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention rather than requiring the present invention to be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present invention. The terms "connected" and "coupled" used in the present invention should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate component. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0034] Please refer to Figure 2 , Figure 2 This is a schematic structural diagram of a new type of insulator device for a separated-phase enclosed busbar in an embodiment of the present invention.

[0035] The present invention provides a new type of insulator device for a separated-phase enclosed busbar, which is installed in a separated-phase enclosed busbar and is used to support the busbar conductor in the busbar housing.

[0036] In the present invention, the new type of insulator device for a separated-phase enclosed busbar includes a support insulator 1 and a bottom plate 2.

[0037] The supporting insulator 1 can be an SMC (Sheet Molding Compound) insulator. The supporting insulator 1 is arranged inside the housing of the isolated-phase enclosed bus. One end of the supporting insulator 1 is arranged on the bottom plate 2 and fixed inside the bus housing through the bottom plate 2. The other end of the supporting insulator 1 has a certain distance from the inner top surface of the housing (the bus is installed in this space). The supporting insulator 1 is used to support the bus conductor and realize the fixed installation of the bus conductor inside the bus housing.

[0038] One end of the supporting insulator 1 in contact with the bottom plate 2 has its end face defined as the installation surface. The installation surface of the supporting insulator 1 contacts the bottom plate 2, thereby realizing the installation of the supporting insulator 1 on the bottom plate 2. One side surface of the bottom plate 2 is connected to the supporting insulator 1, and the same side surface of the bottom plate 2 is connected to the housing. The part of the bottom plate 2 for contacting the housing adopts an annular plane structure design, and through holes for installing bolt assemblies are opened on the bottom plate 2. The bottom plate 2 is fixed on the insulator base of the housing through bolt assemblies.

[0039] In order to improve the insulation performance of the insulator, the present invention optimizes the traditional metal bottom plate (conductive) into an insulating bottom plate (non-conductive). The supporting insulator 1 is installed on the bottom plate 2, and both the supporting insulator 1 and the bottom plate 2 are non-conductive components, which can increase the creepage distance of the insulator and achieve the purpose of improving the insulation performance of the insulator.

[0040] Specifically, the bottom plate 2 is a non-aluminum insulating bottom plate (changing the bottom plate from the traditional aluminum structure to an insulating material structure). The supporting insulator 1 is installed on the bottom plate 2. In order to improve the connection strength between the supporting insulator 1 and the bottom plate 2, in the present invention, the supporting insulator 1 and the bottom plate 2 are connected by interference fit or bonding with insulating glue. The insulating glue refers to glue with bonding function and insulation function at the same time, such as 502 glue. The supporting insulator 1 and the bottom plate 2 are bonded and connected by insulating glue, which can increase the connection strength between the supporting insulator 1 and the bottom plate 2 and improve the insulation of the overall structure after the connection between the supporting insulator 1 and the bottom plate 2.

[0041] In the present invention, the bottom plate 2 can have the following two structures: 1. The bottom plate 2 is integrally made of insulating material, for example, a sheet molding compound bottom plate is made by using sheet molding compound as the raw material; 2. The bottom plate 2 is provided with an inner skeleton structure, and an insulating layer is arranged on the outside of the inner skeleton structure, so that the bottom plate 2 is insulated to form an insulating bottom plate. In the second structural form, first, an inner skeleton with a certain structural strength (metal skeleton or hard plastic skeleton) is set, and an insulating plate is arranged on the outside of the inner skeleton, so that the bottom plate 2 has both high structural strength and insulation.

[0042] In other embodiments of the present invention, the bottom plate 2 can also be made of other insulating materials, such as glass, ceramics, phenolic resin, etc. In a preferred embodiment of the present invention, the bottom plate 2 is designed with an integral structure, which can improve the structural strength of the bottom plate 2.

[0043] The above structural optimization of the bottom plate 2 can improve the insulation of the insulator to a certain extent. In addition, the present invention also proposes another structural improvement to further improve the insulation of the insulator, and the specific improvement is as follows: The end face of the support insulator 1 for contacting the bottom plate 2 is the mounting surface, and the mounting surface is a special-shaped end face. The surface shape of one side of the bottom plate 2 for mounting the support insulator 1 is adapted to the shape of the special-shaped end face. The support insulator 1 is fixedly arranged on the bottom plate 2 through its special-shaped end face.

[0044] In a preferred embodiment of the present invention, both the support insulator 1 and the bottom plate 2 are made by SMC casting.

[0045] For the support insulator 1, the design standard of its special-shaped end face is: it can ensure the reliability of the installation of the support insulator 1 on the bottom plate 2, and can also provide a certain acting force on the support insulator 1 to ensure that it will not tip over when vibrating.

[0046] For the installation form of the support insulator 1 on the bottom plate 2, the present invention provides the following multiple specific embodiments:

[0047] Embodiment 1

[0048] An installation hole 4 coaxial with the support insulator 1 is provided on the mounting surface, and the installation hole 4 is a tapered hole extending from the mounting surface to the other end of the support insulator 1. Further, the installation hole 4 is a stepped hole. Correspondingly, a support post 5 inserted and matched with the installation hole 4 is provided on the bottom plate 2. The support post 5 is a stepped column body. When the support insulator 1 is installed on the bottom plate 2, the support post 5 can be inserted into the installation hole 4, and the outer side surface of the support post 5 is in contact with the inner side surface of the installation hole 4. In the above structural design, the support post 5 provided on the bottom plate 2 is inserted into the installation hole 4, and the connection contact area between the bottom plate 2 and the support insulator 1 increases, which can improve the stability of the support insulator 1 arranged on the bottom plate 2. At the same time, the support post 5 is in contact with the inner side surface of the installation hole 4. When the separated-phase enclosed bus operates and vibrates, due to the large contact surface between the support post 5 and the support insulator 1, it can provide reliable support for the support insulator 1, avoid the support insulator 1 from trembling relative to the bottom plate 2, and ensure the stable installation of the support insulator 1 on the bottom plate 2.

[0049] Based on Embodiment 1, the present invention has also been improved as follows: keeping the structure of the mounting hole 4 on the support insulator 1 unchanged, the support column 5 is structurally optimized. The support column 5 is composed of at least two sheet-shaped support column units with a curved cross-section. The support column units are vertically arranged on the bottom plate 2, so that a cylindrical structure is formed by the support column units. An inverted tooth structure is arranged on the outer side surface of the support column unit, and a card slot that is clamped and matched with the inverted tooth structure is arranged on the inner side surface of the mounting hole 4 on the support insulator 1. During the process of the support insulator 1 being inserted into the support column 5 through its mounting hole 4, the support column units are compressed and contracted by the inner side wall of the mounting hole 4, so as to ensure that the support insulator 1 can be stably assembled onto the bottom plate 2.

[0050] The inverted tooth structure has the characteristic of "one-way passage". During the process of the support insulator 1 being installed on the support column 5, the inner side wall of the mounting hole 4 abuts against the surface of the inverted tooth structure, which can enable the support insulator 1 to be smoothly assembled onto the support column 5. After the inverted tooth structure is clamped into the card slot, the inverted tooth structure on the support column unit cooperates with the card slot on the mounting hole 4, which can prevent the support insulator 1 from falling off backwards. At the same time, the cooperation between the inverted tooth structure and the card slot can also position the installation of the support insulator 1 on the bottom plate 2, improving the assembly accuracy between components. Through the above structure, the support column units exert an outward expansion force on the support insulator 1, which can avoid the problem of the support insulator 1 shaking on the bottom plate 2.

[0051] Based on Embodiment 1, the present invention has also been improved as follows: an installation ring 6 coaxial with the support insulator 1 is arranged on the installation surface and at the outer edge of the mounting hole 4; a support slot that is inserted and matched with the installation ring 6 is arranged on the bottom plate 2. Through the structural design of the installation ring 6 and the support slot, the area of the connection contact surface between the support insulator and the bottom plate 2 can be further increased, and the installation stability of the support insulator 1 on the bottom plate 2 and the sealing performance of the support insulator 1 installed on the bottom plate 2 can be improved.

[0052] Embodiment 2

[0053] A plurality of tooth grooves are arranged at equal intervals on the inner wall of the mounting hole 4 of the support insulator 1, and a rack structure corresponding to the tooth grooves one by one is arranged on the bottom plate 2. In this way, when the support insulator 1 is assembled onto the rack through its mounting hole 4, it can also ensure the fixed installation of the support insulator 1 on the bottom plate 2.

[0054] Based on the structural basis of this embodiment, the present invention can arrange an inverted tooth structure or a protruding block structure on the rack, and a card slot that is clamped and matched with the inverted tooth structure or the block structure is arranged on the tooth groove, so as to further improve the installation stability of the support insulator 1 on the bottom plate 2.

[0055] Embodiment 3

[0056] The mounting hole 4 provided on the support insulator 1 is an internal threaded hole, and a threaded post that is in threaded cooperation with the mounting hole 4 is provided on the bottom plate 2. In this way, the support insulator 1 and the bottom plate 2 can be fixedly connected through the cooperation of the mounting hole 4 and the threaded post.

[0057] The present invention optimizes the structure of the bottom plate 2, that is, the bottom plate 2 is an insulating bottom plate, and a new structural design is carried out on the connection structure between the support insulator 1 and the bottom plate 2. The structural improvement can increase the creepage distance of the insulator and improve the insulation of the present invention.

[0058] In addition, the bottom plate can also be a cast aluminum bottom plate.

[0059] In the prior art, a mushroom head fitting is provided at the top of the insulator. The use of the mushroom head fitting brings the following problems: 1. The mushroom head fitting is a metal component, which is not conducive to the insulation of the insulator; 2. When the mushroom head fitting contacts the busbar and vibrates, the mushroom head fitting will rub against the busbar to generate metal debris, reducing the insulation of the insulator.

[0060] To solve the above two problems, the present invention proposes another structural optimization design, that is: a mushroom head part 3 is provided on the support insulator 1, and an insulating contact layer with a hardness less than that of the busbar is provided on the surface of the mushroom head part 3 for contacting the busbar.

[0061] A card hole for installing the mushroom head part 3 is provided at the top of the support insulator 1, and an elastic block 7 is provided in the card hole. The mushroom head part 3 is stuck in the card hole, and the elastic block 7 is clamped between the mushroom head part 3 and the card hole, improving the firmness of the installation of the mushroom head part 3 in the card hole through the elastic block 7.

[0062] The mushroom head part 3 is assembled on the support insulator 1. When actually applied to the isolated-phase enclosed busbar, the busbar conductor is installed on the top surface of the mushroom head part 3 (pressed on the top surface of the mushroom head part 3). Assuming the surface of the mushroom head part 3 in contact with the busbar is the contact surface, the present invention provides an insulating contact layer with a hardness less than that of the busbar on the contact surface of the mushroom head part 3. In this way, when vibration occurs, the busbar contacts and rubs against the insulating contact layer, and the insulating contact layer generates debris (the busbar with high hardness does not generate debris). These debris are insulating material debris. Therefore, it solves the problem that metal debris in the prior art reduces the insulation of the insulator.

[0063] Of course, the mushroom head part 3 in the present application can also be made of a metal material, such as cast aluminum with a lower hardness.

[0064] For the mushroom head part 3 (the mushroom head fitting in the prior art), its overall structure can also be optimized, that is, the mushroom head part 3 is an insulating mushroom head part with a hardness less than that of the busbar. In this structural design, if the busbar vibrates, the busbar contacts and rubs against the mushroom head part 3, and the mushroom head part 3 generates debris (the busbar with high hardness does not generate debris). These debris are insulating material debris. Therefore, it solves the problem in the prior art that metal debris will reduce the insulation performance of the insulator.

[0065] It is defined here that when an insulating contact layer is provided on the mushroom head part 3, the insulating contact layer is a sheet molding compound insulating contact layer; when the mushroom head part 3 is an insulating mushroom head part, the mushroom head part 3 is a sheet molding compound mushroom head part.

[0066] The present invention also provides a enclosed busbar, which includes a housing, and a busbar is installed in the housing through an insulator. Among them, the insulator is the novel insulator device for isolated-phase enclosed busbar as described above.

[0067] Specifically, the enclosed busbar includes a busbar housing, and a busbar conductor is arranged in the busbar housing. The busbar conductor is supported by the novel insulator device for isolated-phase enclosed busbar as described above to realize the installation in the busbar housing.

[0068] In the novel insulator device for isolated-phase enclosed busbar provided by the present invention, the main improvement points are mainly to remove the metal insert in the traditional insulator support structure, change the bottom plate from an aluminum bottom plate to a bottom plate made of insulating material, and at the same time use insulating glue to bond the insulator and the bottom plate. The insulator and the bottom plate are tightly connected, reducing a sealing surface and improving the sealing performance. The bottom plate is designed as an insulating bottom plate, and the insulator is installed on the bottom plate through its special-shaped end face. Its assembly structure is completely insulated, which can increase the creepage distance of the insulator, enhance the insulation performance of the entire insulator device, and reduce the partial discharge amount. Compared with the original structure, the present invention reduces the fittings for fixing the insulator and the sealing ring for sealing, which can reduce the structural cost and improve the assembly efficiency. Another improvement focus of the present invention is the improvement of the mushroom head fixture. Through structural design, it can make the contact between the mushroom head fixture and the busbar conductor be insulating contact, which can improve the insulation performance of the insulator device. At the same time, the hardness of the part of the mushroom head fixture in contact with the busbar conductor is less than that of the busbar conductor, which can reduce the friction between the mushroom head fixture and the busbar conductor, prevent the occurrence of metal debris generated by the vibration and friction of the busbar during operation, and at the same time increase the insulation height, improve the insulation performance of the busbar, and improve the reliability of the safe operation of the busbar.

[0069] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, various modifications and variations can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A new type of insulator device for isolated-phase enclosed busbars, comprising a support insulator (1) and a bottom plate (2). Characterized in that the end face of the support insulator for contacting the bottom plate is an installation face, the installation face is a special-shaped end face, the side face of the bottom plate for installing the support insulator has a surface shape adapted to the shape of the special-shaped end face, and the support insulator is fixedly arranged on the bottom plate through the special-shaped end face. An installation hole (4) coaxial with the support insulator is arranged on the installation face. A support column (5) inserted and matched with the installation hole is arranged on the bottom plate. The support column (5) is inserted into the installation hole (4), and the outer side face of the support column (5) contacts the inner side face of the installation hole (4). The bottom plate is an insulating bottom plate. The bottom plate is of an integral structure. A mushroom head part (3) is arranged on the support insulator, and an insulating contact layer with a hardness less than that of the busbar is arranged on the surface of the mushroom head part (3) for contacting the busbar. The insulating contact layer is a sheet molding compound insulating contact layer.

2. A new type of insulator device for isolated-phase enclosed busbars, comprising a support insulator (1) and a bottom plate (2). Characterized in that the end face of the support insulator for contacting the bottom plate is an installation face, the installation face is a special-shaped end face, the side face of the bottom plate for installing the support insulator has a surface shape adapted to the shape of the special-shaped end face, and the support insulator is fixedly arranged on the bottom plate through the special-shaped end face. An installation hole (4) coaxial with the support insulator is arranged on the installation face. A support column (5) inserted and matched with the installation hole is arranged on the bottom plate. The support column (5) is inserted into the installation hole (4), and the outer side face of the support column (5) contacts the inner side face of the installation hole (4). The bottom plate is an insulating bottom plate. The bottom plate is of an integral structure. A mushroom head part (3) is arranged on the support insulator, and the mushroom head part (3) is an insulating mushroom head part with a hardness less than that of the busbar. The mushroom head part (3) is a sheet molding compound mushroom head part.

3. The new type of insulator device for isolated-phase enclosed busbars according to claim 1 or 2, Characterized in that an installation ring (6) coaxial with the support insulator is arranged on the installation face and at the outer edge of the installation hole, and a support groove inserted and matched with the installation ring is arranged on the bottom plate.

4. The new type of insulator device for isolated-phase enclosed busbars according to claim 1 or 2, Characterized in that the installation hole is a tapered hole extending from the installation face to the other end of the support insulator; the installation hole is a stepped hole.

5. The new type of insulator device for isolated-phase enclosed busbars according to claim 1 or 2, Characterized in that the support insulator and the bottom plate are adhesively connected through insulating glue.

6. An enclosed busbar, Characterized in that it includes the new type of insulator device for isolated-phase enclosed busbars according to any one of claims 1 to 5.

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