Bus unit, GIL and GIS

Abstract

The utility model relates to the field of insulators or insulating objects distinguished according to shape characteristics, in particular to a bus unit, a GIL (Gas Insulated Line) and a GIS (Gas Insulated Switchgear). The bus unit comprises a cylinder body, a post insulator is arranged in the cylinder body, a conducting rod is installed through the post insulator, the post insulator comprises an insulating column and a supporting conductor arranged at one end of the insulating column, the supporting conductor is provided with a plug hole in plug connection with the conducting rod, and the conducting rod is arranged in the plug hole. A connecting body is arranged in an insertion hole of the supporting conductor, the connecting plate protrudes towards the interior of the insertion hole and is fixedly connected with the end part of the supporting conductor through a fastener, and an operation hole communicated with the insertion hole is also formed in the side wall of the supporting conductor and is used for operating the fastener. According to the utility model, the basic factor that the insulating property of the bus is reduced is eliminated, so that the problem that the insulating property is influenced by abrasion between the conducting rod of the bus and the supporting conductor of the post insulator is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of insulator or insulating object distinguished by shape characteristics, especially relates to a bus unit and GIL and GIS. BACKGROUND

[0002] The bus unit is a key component of the high-voltage direct-current gas insulated metal enclosed transmission line (GIL) and the gas insulated metal enclosed switchgear (GIS). As a typical structure, the bus unit comprises an outer cylinder and a conductive rod arranged in the cylinder, wherein the cross section of the cylinder is circular, and a connecting flange is arranged at the end of the cylinder for butt joint with other bus units. The conductive rod is encapsulated in the cylinder, and generally, a protective gas such as sulfur hexafluoride is filled in the cylinder to improve the insulation performance of the bus unit.

[0003] In order to realize the insulation support of the conductive rod, a post insulator is arranged between the cylinder and the conductive rod. The post insulator comprises an insulating post for cooperation with the cylinder and a support conductor for cooperation with the conductive rod, and the insulating post is generally a porcelain post. The support conductor is provided with a plug-in hole for insertion of the end of the conductive rod of the bus unit, and a coaxial contact finger is arranged in the plug-in hole. When the conductive rod is inserted into the corresponding plug-in hole, the support conductor is reliably electrically connected with the conductive rod through the contact finger in the plug-in hole. In use, the support conductor is fixed at one end of the insulating post, and the end of the insulating post away from the support conductor is supported on the cylinder, and the conductive rod of the bus unit is inserted into the plug-in hole of the support conductor and plugged with the support conductor.

[0004] In the prior art, whether in the transportation process or in the running process, the conductive rod of the bus unit is movably inserted into the plug-in hole of the support conductor of the post insulator. In the transportation process, due to the bumpy road surface and other reasons, the conductive rod of the bus unit will reciprocally move in the plug-in hole of the corresponding support conductor. In this process, friction will occur between the conductive rod and the support conductor of the post insulator. Under the action of the friction, the position where the contact finger contacts the conductive rod will generate metal particles due to wear. Once the metal particles are generated and accumulated to a certain amount, the insulation performance of the bus unit will be reduced to a certain extent. For example, when the metal particles fall on the insulating post, flashover breakdown may occur. In the running process, the conductive rod will also stretch and contract due to thermal expansion and contraction and other factors. In this process, friction will also occur between the contact position of the conductive rod and the contact finger, thereby causing the generation of particles and reducing the insulation performance of the bus unit.

[0005] The problem of insulation performance reduction has acceptable influence in the medium and high voltage field, but once the bus unit is used in the extra high voltage field such as 1100KV, the probability of insulation failure will greatly increase, and once the insulation failure occurs in the extra high voltage field, it will be extremely likely to cause a major safety accident and affect a large range of normal power consumption. Therefore, the problem of insulation performance reduction of the bus unit should be avoided as much as possible. Content of the utility model

[0006] The utility model discloses a bus unit, which is used to solve the problem of wear between the conductive rod of the bus and the support conductor of the post insulator, which affects the insulation performance.

[0007] Meanwhile, the utility model also provides a GIL and GIS containing the bus unit, which is used to solve the above problem.

[0008] In order to solve the above problem, the bus unit of the utility model adopts the following technical scheme: a bus unit, comprising a cylinder, a post insulator is arranged in the cylinder, and a conductive rod is installed on the post insulator through the post insulator, the post insulator comprises an insulating column and a support conductor arranged at one end of the insulating column, a plug-in hole for plugging with the conductive rod is arranged on the support conductor, a connecting body is arranged in the plug-in hole of the support conductor, the connecting body protrudes into the plug-in hole and is fixedly connected with the end of the support conductor through a fastener, and an operation hole communicating with the plug-in hole is further arranged on the side wall of the support conductor, which is used for operating the fastener.

[0009] Furthermore, the connecting body is a connecting plate extending from the hole wall of the plug-in hole to the center of the plug-in hole.

[0010] Furthermore, the connecting plate is a tongue-shaped plate.

[0011] Furthermore, the connecting body and the conductive rod are connected through an insulation part.

[0012] Furthermore, the fastener is a connecting screw, the insulation part comprises an insulation gasket arranged between the end of the conductive rod and the connecting body and an insulation sleeve sleeved on the connecting screw, and the end of the insulation sleeve away from the conductive rod is provided with an insulation flange separating the screw head of the connecting screw and the connecting body.

[0013] Furthermore, a lock washer assembly is arranged between the connecting screw and the insulation flange.

[0014] Furthermore, a connecting hole opposite to the operation hole is arranged on the support conductor, the insulating column passes through the connecting hole, and a plug is arranged to block the operation hole.

[0015] Further, the plug is in the shape of a mushroom head, and is matched with the operation hole through the outer side surface.

[0016] Beneficial effects: the busbar unit is an improved invention creation, the structure of the support insulator between the cylinder and the conductive rod is improved, the connecting body is arranged in the plug-in hole on the support conductor of the support insulator, the connecting body and the conductive rod are fixedly connected through the fastener, the fixed connection between the conductive rod and the support conductor is realized, the relative movement between the conductive rod and the support conductor of the support insulator will not occur in the process of transportation and operation, the sliding friction between the conductive rod and the support conductor of the support insulator is also eliminated, the particles generated by the friction between the conductive rod and the support conductor are avoided, the fundamental factor of reducing the insulation performance of the busbar is eliminated, and the problem that the wear between the conductive rod and the support conductor of the support insulator affects the insulation performance of the busbar is solved.

[0017] The GIL of the utility model adopts the following technical scheme:

[0018] The GIL comprises two or more busbar units connected with each other, the busbar unit comprises a cylinder, a support insulator is arranged in the cylinder, and a conductive rod is installed on the support insulator through the support insulator, the support insulator comprises an insulating column and a support conductor arranged at one end of the insulating column, a plug-in hole for plugging the conductive rod is arranged on the support conductor, a connecting body is arranged in the plug-in hole of the support conductor, the connecting body protrudes into the plug-in hole and is fixedly connected with the end of the support conductor through a fastener, and an operation hole communicating with the plug-in hole is further arranged on the side wall of the support conductor, so as to operate the fastener.

[0019] Further, the connecting body is a connecting plate extending from the hole wall of the plug-in hole to the center of the plug-in hole.

[0020] Further, the connecting plate is a tongue-shaped plate.

[0021] Further, the connecting body and the conductive rod are matched through an insulating part.

[0022] Further, the fastener is a connecting screw, the insulating part comprises an insulating gasket arranged between the end of the conductive rod and the connecting body and an insulating sleeve sleeved on the connecting screw, and the end of the insulating sleeve away from the conductive rod is provided with an insulating flange separating the screw head of the connecting screw and the connecting body.

[0023] Further, a lock washer assembly is arranged between the connecting screw and the insulating flange.

[0024] Further, the support conductor is provided with a connecting hole opposite to the operation hole, the insulating column passes through the connecting hole, and a plug is arranged to block the operation hole.

[0025] Further, the plug is in the shape of a mushroom head, and is matched with the operation hole through the outer side surface.

[0026] Beneficial effects: the GIL is an improved invention. By improving the structure of the support insulator between the cylinder of the busbar unit and the conductive rod, a connecting body is arranged in the insertion hole on the support conductor of the support insulator, and the connecting body and the conductive rod are fixedly connected through the fastener. Thus, the fixed connection between the conductive rod and the support conductor is realized. During transportation and operation, the conductive rod and the support conductor of the support insulator will not move relatively, and the sliding friction between the two is also eliminated, so that the friction between the conductive rod and the support conductor is avoided to generate particles, and the fundamental factor of reducing the insulation performance of the busbar is eliminated, thereby solving the problem that the wear between the conductive rod of the busbar and the support conductor of the support insulator affects the insulation performance.

[0027] The GIS of the utility model adopts the following technical scheme:

[0028] The GIS comprises a busbar unit, the busbar unit comprises a cylinder, a support insulator is arranged in the cylinder, and a conductive rod is installed through the support insulator, the support insulator comprises an insulating column and a support conductor arranged at one end of the insulating column, an insertion hole for inserting the conductive rod is arranged on the support conductor, a connecting body is arranged in the insertion hole of the support conductor, the connecting body protrudes into the insertion hole and is fixedly connected with the end part of the support conductor through a fastener, and an operation hole communicating with the insertion hole is further arranged on the side wall of the support conductor, so as to operate the fastener.

[0029] Further, the connecting body is a connecting plate extending from the hole wall of the insertion hole to the center of the insertion hole.

[0030] Further, the connecting plate is a tongue-shaped plate.

[0031] Further, the connecting body and the conductive rod are matched through an insulating component.

[0032] Further, the fastener is a connecting screw, the insulating component comprises an insulating gasket arranged between the end part of the conductive rod and the connecting body and an insulating sleeve sleeved on the connecting screw, and the end part of the insulating sleeve away from the conductive rod is provided with an insulating flange separating the screw head of the connecting screw and the connecting body.

[0033] Further, a lock washer assembly is arranged between the connecting screw and the insulating flange.

[0034] Further, the support conductor is provided with a connecting hole opposite to the operation hole, the insulating column passes through the connecting hole, and a plug for plugging the operation hole is arranged.

[0035] Further, the plug is in the shape of a mushroom head, which cooperates with the operation hole.

[0036] Beneficial effects: the GIS is an improved invention. By improving the structure of the support insulator between the body of the barrel bus unit and the conductive rod, a connecting body is arranged in the insertion hole on the support conductor of the support insulator, and the connecting body and the conductive rod are fixedly connected through the fastener. Thus, the fixed connection between the conductive rod and the support conductor is realized. During transportation and operation, there will be no relative movement between the conductive rod and the support conductor of the support insulator, and the sliding friction between them will also be eliminated, so that the friction between the conductive rod and the support conductor is avoided to generate particles, and the fundamental factor of reducing the insulation performance of the busbar is eliminated, thereby solving the problem of affecting the insulation performance caused by the wear between the conductive rod of the busbar and the support conductor of the support insulator. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 is a structural schematic view of an embodiment of the bus unit of the utility model;

[0038] Figure 2 is Figure 1 the partial enlarged view of the cooperation position between the conductive rod and the support conductor in the bus unit.

[0039] In the figure: 101, conductive rod; 11, end plate; 102, support insulator; 21, support conductor; 22, insulating column; 23, conductive contact finger; 24, connecting body; 25, operation hole; 26, plug; 103, barrel body; 104, connecting screw; 105, insulating gasket; 106, insulating sleeve; 107, flat gasket; 108, spring gasket. DETAILED DESCRIPTION

[0040] The features and performance of the utility model are further described in detail in combination with the embodiments.

[0041] The fundamental reason for the wear between the conductive rod 101 and the support conductor 21 of the support insulator 102 of the bus unit is that they are movably matched, that is, after the conductive rod 101 is inserted into the insertion hole of the support conductor 21, they are not fixed relative to each other, so they are prone to relative sliding under the action of external vibration, thermal expansion and contraction, etc. During the sliding process, wear occurs, which further leads to the generation of metal particles, and the metal particles eventually lead to the decline of the insulation performance of the bus unit. Therefore, by relatively fixing the conductive rod 101 and the support conductor 21 of the support insulator 102 of the bus unit without affecting the operation of the bus unit, the generation of metal particles can be prevented, and the problem of the decline of the insulation performance of the bus unit can be solved. The technical scheme of the bus unit of the utility model is based on the above invention concept.

[0042] Based on the above inventive concept, a basic embodiment of the busbar unit is as follows: in the basic embodiment, the busbar unit comprises a barrel 103, a conductive rod 101 and a post insulator 102.

[0043] The barrel 103 is a metal barrel, the cross section of which is circular, and both ends are provided with connecting flanges (not shown in the figure) for butt joint with the barrels of adjacent busbar units or switchgears, which plays a protective role for the conductive rod 101 and insulation isolation in use. The structure of the barrel 103 is a prior art, and thus will not be described here. The conductive rod 101 is a metal rod arranged at the center of the barrel 103 for transmitting current.

[0044] The conductive rod 101 is generally a circular conductive rod, which mostly adopts a hollow structure, and in some cases can also adopt a solid structure. The conductive rod 101 is provided with a plug-in connector at each end, which is plugged into the plug-in hole provided on the support conductor 21 of the post insulator 102, so as to realize the electrical connection between the conductive rod 101 and the support conductor 21 of the post insulator 102. In the busbar unit of the present application, the end of the conductive rod 101 is closed by an end plate 11, forming a hollow in the middle and a structure with both ends closed. The end plate 11 can be integrated with the other parts of the conductive rod 101, or can be separately manufactured and fixed on the other parts of the conductive rod 101 by welding, screw connection, bolt connection, etc.

[0045] The post insulator 102 comprises an insulating column 22 and a support conductor 21. One end (lower end) of the insulating column 22 is supported and matched with the barrel 103, and the support conductor 21 is fixed at the upper end of the insulating column 22. The support conductor 21 is provided with a plug-in hole coaxial with the conductive rod 101, and a conductive contact finger 23 is arranged in the plug-in hole. The plug-in connector at the end of the conductive rod 101 is inserted into the corresponding plug-in hole on the support conductor 21, and the conductive contact finger 23 can realize reliable electrical connection between the conductive rod 101 and the support conductor 21. The structure of the conductive contact finger 23 and the matching structure between the conductive contact finger 23 and the support conductor 21 are both prior arts, and thus will not be described here. Figure 1 、 2 In the embodiment shown in the figure, the support conductor 21 has a cylindrical structure as a whole, and both ends are provided with plug-in holes for plugging with the conductive rods 101 on both sides, so as to realize the electrical connection between the two conductive rods 101 plugged together.

[0046] Different from the prior art, in the busbar unit of the present application, the support conductor 21 is provided with a connecting body 24 in the plug-in hole. The connecting body 24 protrudes from the hole wall of the plug-in hole to the center of the plug-in hole, and functions to connect with the end of the conductive rod 101 and fix the conductive rod 101 relative to the support conductor 21. Therefore, the connecting body 24 can adopt any structure such as a block or a plate, and the shape is not limited, as long as it can meet the connection requirements.

[0047] In a preferred embodiment, as shown in Figure 1 、 2 , the connecting body 24 adopts a connecting plate, and the plate-shaped connecting body 24 has the advantages of simple structure and easy processing; further, the connecting plate can adopt a tongue-shaped plate, i.e. by controlling its width to form a long strip, which can be connected with the conductive rod.

[0048] By setting the connecting body 24, the connecting body 24 and the conductive rod 101 are fixedly connected through fasteners, which can be bolts, screws, rivets, etc., which not only facilitates installation, but also has high reliability. In order to operate the connection between the conductive rod 101 and the connecting body 24, an operating hole 25 is provided on the side wall of the support conductor 21, and the operating hole 25 can be used for the tool to enter, so as to operate the fastener. For example, in the preferred embodiment shown in Figure 1 、 2 , the fastener adopts a connecting screw 104, and the operating hole can be used for entering a wrench or the like to screw the connecting screw 104.

[0049] In order to prevent the virtual connection heating problem that may occur at the connection position of the connecting body 24 and the conductive rod 101, in a preferred embodiment, the connecting body 24 and the conductive rod 101 are insulated and cooperated through an insulating component; the insulating cooperation mode can adopt the structure commonly used in the prior art, such as insulating paint, insulating gasket, etc. In a preferred embodiment, as shown in Figure 1 、 2 , the insulating component includes an insulating gasket 105 interposed between the end of the conductive rod and the connecting body, and an insulating sleeve 106 sleeved on the connecting screw 104, and the end of the insulating sleeve 106 away from the conductive rod 101 is provided with an insulating flange separating the screw head of the connecting screw 104 and the connecting body 24.

[0050] In order to prevent the fastener from loosening due to vibration and other factors during transportation or operation, on the basis of the above-mentioned preferred embodiment, in a more preferred embodiment, a lock washer assembly is provided between the connecting screw 104 and the insulating flange. Specifically, the lock washer assembly includes a flat washer 107 and a spring washer 108, and the structure and use of the flat washer 107 and the spring washer 108 are both prior art, which will not be described here.

[0051] As a preferred embodiment, the support conductor 21 is connected with the insulating column 22 through the connecting hole provided on the outer side thereof. In order to prevent the setting of the operating hole 25 from damaging the protection of the support conductor (prevent foreign matter from entering), the insulating column 22 passes through the connecting hole and is provided with a plug 26 sealing the operating hole. On this basis, in order to improve the surrounding electric field, the plug 26 is in the shape of a mushroom head, which cooperates with the operating hole through the outer side.

[0052] The specific implementation of the GIL is as follows:

[0053] The GIL comprises two or more busbar units connected to each other, and the busbar unit is the busbar unit of the utility model. The structure of the busbar unit has been described in detail in the above embodiment, and will not be repeated here.

[0054] The specific implementation of the GIS is as follows:

[0055] The GIS comprises a busbar unit, and the busbar unit is used for connecting related switch devices. The busbar unit is the busbar unit of the utility model. The structure of the busbar unit has been described in detail in the above embodiment, and will not be repeated here.

[0056] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model. The patent protection scope of the utility model is subject to the claims, and any equivalent structural changes made by referring to the contents of the specification and drawings of the utility model should also be included in the protection scope of the utility model.

Claims

1. A busbar unit, comprising a cylindrical body, wherein a post insulator is disposed within the cylindrical body and a conductive rod is mounted therethrough, the post insulator comprising an insulating post and a supporting conductor disposed at one end of the insulating post, the supporting conductor having an insertion hole for insertion into the conductive rod, characterized in that, A connector is provided in the insertion hole of the support conductor. The connector protrudes into the insertion hole and is fixedly connected to the end of the support conductor by a fastener. An operation hole communicating with the insertion hole is also provided on the side wall of the support conductor for operating the fastener.

2. The bus unit according to claim 1, characterized in that, The connector is a connecting plate that extends from the wall of the insertion hole toward the center of the insertion hole.

3. The busbar unit according to claim 2, characterized in that, The connecting plate is a tongue-shaped plate.

4. The busbar unit according to any one of claims 1-3, characterized in that, The connector and the conductive rod are insulated together by an insulating component.

5. The busbar unit according to claim 4, characterized in that, The fastener is a connecting screw, and the insulating component includes an insulating washer placed between the end of the conductive rod and the connecting body, and an insulating sleeve fitted on the connecting screw. The end of the insulating sleeve away from the conductive rod is provided with an insulating flange that separates the screw head of the connecting screw from the connecting body.

6. The bus unit according to claim 5, characterized in that, An anti-loosening washer assembly is provided between the connecting screw and the insulating flange.

7. The bus unit according to claim 1, characterized in that, The supporting conductor is provided with a connection hole opposite to the operating hole, the insulating post passes through the connection hole and is provided with a plug to seal the operating hole.

8. The bus unit according to claim 7, characterized in that, The plug is mushroom-shaped and mates with the operating hole via its outer surface.

9. GIL, comprising two or more interconnected busbar units, characterized in that, The bus unit is the bus unit as described in any one of claims 1-8.

10. GIS, including busbar units, characterized in that, The bus unit is the bus unit as described in any one of claims 1-8.

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