Integrated vacuum circuit breaker for low-frequency alternating-current GIS switch equipment

Abstract

The utility model discloses an integrated vacuum circuit breaker used for a low frequency AC GIS switch device, comprising a mechanism installation plate, a separator plate, a control mechanism and a vacuum arc extinguish chamber, one side surface of the mechanism installation plate is provided with a butt joint position used for butt joint with an interface of a GIS housing; the partition plate is fixedly mounted at the butt joint position and is spaced from the mechanism mounting plate; the control mechanism is fixedly mounted on the other side surface of the mechanism mounting plate; the vacuum arc-extinguishing chamber is fixedly installed on the partition plate, a moving contact of the vacuum arc-extinguishing chamber is in transmission connection with the control mechanism, the moving contact of the vacuum arc-extinguishing chamber is electrically connected with a wiring conductor used for being connected with an external cable, the wiring conductor is installed on an insulating sleeve, and the insulating sleeve is installed at the butt joint position. According to the integrated vacuum circuit breaker provided by the utility model, the control mechanism, the vacuum arc-extinguishing chamber, the insulating sleeve and other components can be pre-assembled into a whole and then integrally mounted on the GIS shell, so that the assembly efficiency can be improved, the reserved mounting space of the GIS shell is reduced, and the miniaturization and compactness of GIS switch equipment are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum circuit breakers, in particular to an integrated vacuum circuit breaker for low-frequency AC GIS switch equipment. Background Art

[0002] At present, environmentally friendly gas GIS is used as the insulating medium in 72.5kV high-voltage low-frequency AC GIS switchgear, which can achieve the purpose of energy saving, high efficiency and green environmental protection. However, when installing the vacuum circuit breaker of the existing 72.5kV high-voltage low-frequency AC GIS switchgear, the arc extinguishing chamber and the operating mechanism and other components are installed on the GIS shell respectively, and then the arc extinguishing chamber and the operating mechanism are connected by transmission. This installation method requires special tools and steps to complete the installation of the vacuum circuit breaker in the GIS shell with limited space. The installation process is relatively cumbersome and the assembly efficiency of the switchgear is low. In addition, the GIS shell needs to reserve sufficient space for the installation of the arc extinguishing chamber and the operating mechanism respectively, and consider the space occupied by the connection between them and the transmission mechanism, which limits the miniaturization and compact design of the GIS equipment and increases the overall volume and weight. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes an integrated vacuum circuit breaker for low-frequency AC GIS switchgear, wherein the operating mechanism, vacuum interrupter, insulating sleeve and other components can be pre-assembled as one and then installed as a whole to the GIS housing, which can improve the assembly efficiency of the GIS switchgear and reduce the installation space reserved for the GIS housing, which is conducive to the miniaturization and compactness of the GIS switchgear.

[0004] According to an embodiment of the utility model, an integrated vacuum circuit breaker for low-frequency AC GIS switchgear includes a mechanism mounting plate, a partition, an operating mechanism and a vacuum arc chamber, wherein a docking position for docking an interface of a GIS shell is arranged on one side of the mechanism mounting plate; the partition is fixedly installed at the docking position and spaced apart from the mechanism mounting plate; the operating mechanism is fixedly installed on the other side of the mechanism mounting plate; the vacuum arc chamber is fixedly installed on the partition, the moving contact of the vacuum arc chamber is transmission-connected with the operating mechanism, the moving contact of the vacuum arc chamber is electrically connected with a wiring conductor for connecting an external cable, the wiring conductor is installed on an insulating sleeve, and the insulating sleeve is installed at the docking position, wherein the vertical projections of the partition, the vacuum arc chamber and the insulating sleeve relative to the mechanism mounting plate are all located within the contour range of the docking position.

[0005] An integrated vacuum circuit breaker for low-frequency AC GIS switchgear according to an embodiment of the utility model has at least the following beneficial effects: the integrated vacuum circuit breaker provided by the utility model, its operating mechanism, vacuum arc extinguishing chamber, insulating sleeve and other components can be pre-installed as one with the mechanism mounting plate. Since the vertical projections of the partition, the vacuum arc extinguishing chamber and the insulating sleeve relative to the mechanism mounting plate are all located within the contour range of the docking position, during the assembly of the GIS switchgear, it is only necessary to align the docking position of the mechanism mounting plate with the interface of the GIS shell, and the vacuum circuit breaker can be integrally inserted into the GIS shell, and finally the mechanism mounting plate can be fixed to the GIS shell. In this way, the assembly process of the GIS switchgear can be simplified, the assembly efficiency of the GIS switchgear can be improved, and the installation space reserved for the vacuum circuit breaker in the GIS shell can be reduced, which is conducive to the miniaturization and compactness of the GIS switchgear.

[0006] According to some embodiments of the utility model, the moving contact of the vacuum arc extinguishing chamber is screwed with an insulating pull rod, the insulating pull rod is screwed with a connecting rod, the connecting rod is connected to the output part of the operating mechanism, and the output part of the operating mechanism can drive the connecting rod to slide.

[0007] According to some embodiments of the utility model, the operating mechanism includes a housing, a drive assembly and a transmission shaft, the housing is mounted on the mechanism mounting plate by bolts, the drive assembly is mounted on the housing, the transmission shaft is rotatably mounted on the housing, the transmission shaft is transmission-connected to the drive assembly, a toggle handle is installed on the transmission shaft, the output part includes a sliding block transmission-connected to the toggle handle, the connecting rod is passed through the sliding block, the connecting rod is threaded with a first nut, and the first nut is used to limit the connecting rod from being separated from the sliding block.

[0008] According to some embodiments of the utility model, the connecting rod sleeve is provided with a retractable bellows, one end of the bellows is fixedly installed at the docking position, the other end of the bellows is provided with a cover plate, and the connecting rod is passed through the cover plate.

[0009] According to some embodiments of the present invention, a sealing structure is provided between the connecting rod and the bellows.

[0010] According to some embodiments of the utility model, the sealing structure includes a mounting sleeve and two sealing seats, the connecting rod is inserted into the mounting sleeve, at least one sealing ring is arranged between the mounting sleeve and the connecting rod, the two sealing seats are slidably mounted on the mounting sleeve, a limiting portion is arranged at one end of the mounting sleeve and a second nut is threadedly connected to the other end, the two sealing seats are located between the second nut and the limiting portion, and the two sealing seats are both provided with an annular mounting portion, and the mounting portion is embedded in the wave groove of the corrugated pipe.

[0011] According to some embodiments of the present utility model, the inner wall of the mounting sleeve is provided with an annular first abutting portion, a second abutting portion and a third abutting portion. Two sealing rings are clamped between the first abutting portion and the second abutting portion, and two sealing rings are clamped between the second abutting portion and the third abutting portion. Among them, the two sealing rings located on both sides are A-type dust-proof rings, and the two sealing rings located in the middle are Y-type dust-proof rings. The lip of the A-type dust-proof ring abuts against the connecting rod.

[0012] According to some embodiments of the present utility model, an external conductor is fixedly installed on the insulating housing of the vacuum interrupter. The external conductor is connected with a flexible conductor. One end of the flexible conductor is connected with the moving contact of the vacuum interrupter, and the external conductor is electrically connected with the wiring conductor.

[0013] According to some embodiments of the present utility model, the wiring conductor is connected with a flexible conductor, and the flexible conductor is connected with the external conductor by bolts or pins.

[0014] According to some embodiments of the present utility model, three vacuum interrupters are arranged side by side.

[0015] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0017] Figure 1 is a schematic diagram of an integrated vacuum circuit breaker for low-frequency AC GIS switchgear according to an embodiment of the present utility model;

[0018] Figure 2 is Figure 1 a cross-sectional view of an integrated vacuum circuit breaker for low-frequency AC GIS switchgear shown;

[0019] Figure 3 is Figure 2 an enlarged view of part A in

[0020] Figure 4 is Figure 1 a schematic connection diagram between the operating mechanism and the connecting rod of an integrated vacuum circuit breaker for low-frequency AC GIS switchgear shown;

[0021] Figure 5 is Figure 1Schematic diagram showing an integrated vacuum circuit breaker for low-frequency AC GIS switchgear when installed in a GIS housing.

[0022] Reference numerals:

[0023] Mechanism mounting plate 110, docking position 111, groove 112, partition 120, operating mechanism 130, housing 131, drive assembly 132, transmission shaft 133, toggle handle 134, sliding block 135, vacuum interrupter 140, moving contact 141, external conductor 142, flexible conductor 143, wiring conductor 151, flexible conductor 152, insulating bushing 153, insulating rod 161, connecting rod 162, first nut 163, bellows 170, wave groove 171, cover plate 172, mounting sleeve 181, first abutting portion 1811, second abutting portion 1812, third abutting portion 1813, limiting portion 1814, sealing seat 182, mounting portion 1821, second nut 183, sealing ring 184, GIS housing 200. Detailed implementation manners

[0024] The embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for explaining the present utility model and should not be construed as a limitation of the present utility model.

[0025] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is only for facilitating the description of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0026] In the description of the present utility model, the meaning of several is one or more, the meaning of multiple is two or more, and understandings such as greater than, less than, exceeding, etc. do not include the present number, and understandings such as above, below, within, etc. include the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0027] In the description of the present utility model, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0028] Refer to Figure 1and Figure 2 According to an embodiment of the utility model, an integrated vacuum circuit breaker for low-frequency AC GIS switchgear includes a mechanism mounting plate 110, a partition 120, an operating mechanism 130 and a vacuum interrupter 140. A docking position 111 for docking an interface of a GIS housing 200 is provided on one side of the mechanism mounting plate 110; the partition 120 is fixedly installed at the docking position 111 and spaced apart from the mechanism mounting plate 110; the operating mechanism 130 is fixedly installed on the other side of the mechanism mounting plate 110; the vacuum interrupter 140 is provided with a vacuum interrupter 14 ... The chamber 140 is fixedly mounted on the partition 120, and the moving contact 141 of the vacuum arc chamber 140 is transmission-connected to the operating mechanism 130. The moving contact 141 of the vacuum arc chamber 140 is electrically connected to a wiring conductor 151 for connecting an external cable. The wiring conductor 151 is installed on an insulating sleeve 153, and the insulating sleeve 153 is installed on the docking position 111, wherein the vertical projections of the partition 120, the vacuum arc chamber 140, and the insulating sleeve 153 relative to the mechanism mounting plate 110 are all located within the contour range of the docking position 111.

[0029] Reference Figure 1 and Figure 5 The integrated vacuum circuit breaker provided by the utility model, its operating mechanism 130, vacuum arc chamber 140, insulating sleeve 153 and other components can be pre-installed as one with the mechanism mounting plate 110. Since the vertical projections of the partition 120, vacuum arc chamber 140 and insulating sleeve 153 relative to the mechanism mounting plate 110 are all located within the contour range of the docking position 111, during the assembly of the GIS switchgear, it is only necessary to align the docking position 111 of the mechanism mounting plate 110 with the interface of the GIS housing 200, and the vacuum circuit breaker can be integrally inserted into the GIS housing 200, and finally the mechanism mounting plate 110 and the GIS housing 200 can be fixed. In this way, the assembly process of the GIS switchgear can be simplified, the assembly efficiency of the GIS switchgear can be improved, and the installation space reserved for the vacuum circuit breaker in the GIS housing 200 can be reduced, which is conducive to the miniaturization and compactness of the GIS switchgear.

[0030] Reference Figure 1 In a specific implementation process, a groove 112 is provided at the periphery of the docking position 111 , and the groove 112 is used to install an annular sealing gasket so that the mechanism mounting plate 110 and the GIS housing 200 form a seal.

[0031] Reference Figure 2, according to some embodiments of the present utility model, a moving contact 141 of the vacuum interrupter 140 is screwed with an insulating pull rod 161, the insulating pull rod 161 is screwed with a connecting rod 162, and the connecting rod 162 is connected to an output part of the operating mechanism 130, and the output part of the operating mechanism 130 can drive the connecting rod 162 to slide. With the above arrangement, the disassembly and assembly among the moving contact 141, the insulating pull rod 161 and the connecting rod 162 of the vacuum interrupter 140 are convenient, which can facilitate the assembly of the vacuum circuit breaker and improve the assembly efficiency of the vacuum circuit breaker.

[0032] Referring to Figure 2 and Figure 4 , according to some embodiments of the present utility model, the operating mechanism 130 includes a housing 131, a driving component 132 and a transmission shaft 133. The housing 131 is installed on the mechanism mounting plate 110 by bolts, the driving component 132 is installed in the housing 131, the transmission shaft 133 is rotatably installed in the housing 131, the transmission shaft 133 is in transmission connection with the driving component 132, a toggle handle 134 is installed on the transmission shaft 133, and the output part includes a sliding block 135 in transmission connection with the toggle handle 134. The connecting rod 162 passes through the sliding block 135, and a first nut 163 is screwed on the connecting rod 162, and the first nut 163 is used to prevent the connecting rod 162 from detaching from the sliding block 135. Through the above arrangement, the connection between the connecting rod 162 and the operating mechanism 130 can be facilitated, so as to further facilitate the assembly of the vacuum circuit breaker and improve the assembly efficiency of the vacuum circuit breaker.

[0033] It can be imagined that in some other embodiments, the above operating mechanism 130 can also adopt other setting methods. For example, the operating mechanism 130 includes a telescopic cylinder, and the telescopic cylinder is screwed with the connecting rod 162. Thus, the telescopic cylinder can directly drive the connecting rod 162 to slide along the axis of the connecting rod 162.

[0034] Referring to Figure 1 and Figure 2 , according to some embodiments of the present utility model, a telescopic bellows 170 is sleeved on the connecting rod 162. One end of the bellows 170 is fixedly installed at the docking position 111, and a cover plate 172 is arranged at the other end of the bellows 170, and the connecting rod 162 passes through the cover plate 172. Therefore, the gap between the connecting rod 162 and the mechanism mounting plate 110 can be sealed by the bellows 170.

[0035] Referring to Figure 2 and Figure 3 , according to some embodiments of the present utility model, a sealing structure is arranged between the connecting rod 162 and the bellows 170, and the sealing structure plays a role in dust prevention and air leakage prevention.

[0036] Referring to Figure 2 and Figure 3, according to some embodiments of the present utility model, the sealing structure includes an installation sleeve 181 and two sealing seats 182. The connecting rod 162 passes through the installation sleeve 181. At least one sealing ring 184 is provided between the installation sleeve 181 and the connecting rod 162. The two sealing seats 182 are slidably sleeved on the installation sleeve 181. A limiting portion 1814 is provided at one end of the installation sleeve 181, and a second nut 183 is screwed at the other end. The two sealing seats 182 are located between the second nut 183 and the limiting portion 1814. Both of the two sealing seats 182 are provided with an annular installation portion 1821, and the installation portion 1821 is embedded in the wave trough 171 of the corrugated pipe 170 to fix the sealing seat 182. Wherein, the two sealing seats 182 can expand and contract along with the corrugated pipe 170 to ensure that the installation portion 1821 and the corrugated pipe 170 can always cooperate to form a sealing effect. With the above arrangement, a seal is formed between the installation sleeve 181 and the inner wall of the corrugated pipe 170, and a seal is also formed between the installation sleeve 181 and the connecting rod 162, so that the seal between the connecting rod 162 and the corrugated pipe 170 is good.

[0037] Referring to Figure 2 and Figure 3 , according to some embodiments of the present utility model, the inner wall of the installation sleeve 181 is provided with an annular first abutting portion 1811, a second abutting portion 1812 and a third abutting portion 1813. Two sealing rings 184 are clamped between the first abutting portion 1811 and the second abutting portion 1812, and two sealing rings 184 are clamped between the second abutting portion 1812 and the third abutting portion 1813. Among them, the two sealing rings 184 located on both sides are A-type dust-proof rings, and the two sealing rings 184 located in the middle are Y-type dust-proof rings. The lips of the A-type dust-proof rings abut against the connecting rod 162. Thus, when the connecting rod 162 slides, the lips of the A-type dust-proof rings are pressed and deformed to form an effective seal, while the Y-type dust-proof rings can form an effective seal when the connecting rod 162 is stationary. With the above arrangement, a multi-layer seal is formed between the installation sleeve 181 and the connecting rod 162, and the sealing effect is good.

[0038] It can be imagined that in some embodiments, a sealing structure can also be provided between the cover plate 172 and the connecting rod 162 to further improve the sealing performance between the connecting rod 162 and the corrugated pipe 170.

[0039] Referring to Figure 1 and Figure 2 , according to some embodiments of the present utility model, an external conductor 142 is fixedly installed on the insulating housing of the vacuum interrupter 140. The external conductor 142 is connected with a flexible conductor 143. One end of the flexible conductor 143 is connected with the moving contact 141 of the vacuum interrupter 140, and the external conductor 142 is electrically connected with the wiring conductor 151. Through the above arrangement, the situation of poor contact between the wiring conductor 151 and the moving contact 141 can be effectively reduced.

[0040] Referring to Figure 1 and Figure 2 , according to some embodiments of the present utility model, the wiring conductor 151 is connected with a flexible conductor 152, and the flexible conductor 152 is connected with an external conductor 142 through a bolt or a pin. With the above arrangement, it is convenient to connect electricity between the wiring conductor 151 and the external conductor 142.

[0041] In the specific implementation process, if the GIS switchgear is single-phase power transmission, in the above-mentioned integrated vacuum circuit breaker, components such as the vacuum interrupter 140 and the insulating bushing 153 can be provided with only one, which can meet the working requirements.

[0042] Referring to Figure 1 , in some embodiments, if the GIS switchgear is three-phase power transmission, at this time, three vacuum interrupters 140 are arranged side by side. Correspondingly, the operating mechanism 130 is provided with three output parts, and the above-mentioned insulating bushings 153 and bellows 170 are also provided with three. Thus, the integrated vacuum circuit breaker can meet the requirements of three-phase power transmission.

[0043] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0044] The above has described this embodiment in detail with reference to the drawings, but the present utility model is not limited to the above embodiment. Within the scope of knowledge possessed by those of ordinary skill in the art in the technical field, various changes can be made without departing from the gist of the present utility model.

Claims

1. An integrated vacuum circuit breaker for low-frequency AC GIS switchgear, characterized in that, include: A mechanism mounting plate (110) having a side surface provided with a docking position (111) for docking with an interface of a GIS housing (200); A partition plate (120) is fixedly mounted on the docking position (111) and spaced apart from the mechanism mounting plate (110); A control mechanism (130) is fixedly mounted on the other side of the mechanism mounting plate (110); A vacuum interrupter (140) is fixedly mounted on the partition (120); a moving contact (141) of the vacuum interrupter (140) is transmission-connected to the operating mechanism (130); the moving contact (141) of the vacuum interrupter (140) is electrically connected to a wiring conductor (151) for connecting an external cable; the wiring conductor (151) is mounted on an insulating sleeve (153); and the insulating sleeve (153) is mounted on the docking position (111); Wherein, vertical projections of the partition plate (120), the vacuum arc extinguishing chamber (140), and the insulating sleeve (153) relative to the mechanism mounting plate (110) are all located within the contour range of the docking position (111).

2. The integrated vacuum circuit breaker for low-frequency AC GIS switchgear according to claim 1, characterized in that, The moving contact (141) of the vacuum interrupter (140) is screwed with an insulating pull rod (161), and the insulating pull rod (161) is screwed with a connecting rod (162). The connecting rod (162) is connected to the output part of the operating mechanism (130), and the output part of the operating mechanism (130) can drive the connecting rod (162) to slide.

3. The integrated vacuum circuit breaker for low-frequency AC GIS switchgear according to claim 2, characterized in that, The operating mechanism (130) comprises a housing (131), a driving assembly (132) and a transmission shaft (133); the housing (131) is mounted on the mechanism mounting plate (110) by bolts; the driving assembly (132) is mounted on the housing (131); the transmission shaft (133) is rotatably mounted on the housing (131); the transmission shaft (133) is transmission-connected to the driving assembly (132); a toggle handle (134) is mounted on the transmission shaft (133); the output portion comprises a sliding block (135) transmission-connected to the toggle handle (134); the connecting rod (162) is passed through the sliding block (135); the connecting rod (162) is threaded with a first nut (163); the first nut (163) is used to limit the connecting rod (162) from being separated from the sliding block (135).

4. An integrated vacuum circuit breaker for low-frequency AC GIS switchgear according to claim 2, characterized in that, The connecting rod (162) is sleeved with a retractable bellows (170), one end of the bellows (170) is fixedly mounted on the docking position (111), the other end of the bellows (170) is provided with a cover plate (172), and the connecting rod (162) is passed through the cover plate (172).

5. The integrated vacuum circuit breaker for low-frequency AC GIS switchgear according to claim 4, characterized in that, A sealing structure is provided between the connecting rod (162) and the bellows (170).

6. The integrated vacuum circuit breaker for low-frequency AC GIS switchgear according to claim 5, characterized in that, The sealing structure includes a mounting sleeve (181) and two sealing seats (182). The connecting rod (162) passes through the mounting sleeve (181). At least one sealing ring (184) is provided between the mounting sleeve (181) and the connecting rod (162). The two sealing seats (182) are slidably sleeved on the mounting sleeve (181). A limiting portion (1814) is provided at one end of the mounting sleeve (181), and a second nut (183) is screwed at the other end. The two sealing seats (182) are located between the second nut (183) and the limiting portion (1814). Both of the two sealing seats (182) are provided with an annular mounting portion (1821), and the mounting portion (1821) is embedded in the wave groove (171) of the corrugated pipe (170).

7. An integrated vacuum circuit breaker for low-frequency AC GIS switchgear according to claim 6, characterized in that, The inner wall of the mounting sleeve (181) is provided with an annular first abutting portion (1811), a second abutting portion (1812) and a third abutting portion (1813). Two sealing rings (184) are clamped between the first abutting portion (1811) and the second abutting portion (1812). Two sealing rings (184) are clamped between the second abutting portion (1812) and the third abutting portion (1813). Among them, the two sealing rings (184) located on both sides are A-type dust-proof rings, and the two sealing rings (184) located in the middle are Y-type dust-proof rings. The lip of the A-type dust-proof ring abuts against the connecting rod (162).

8. An integrated vacuum circuit breaker for a low-frequency AC GIS switchgear according to claim 1, characterized in that, An external conductor (142) is fixedly installed on the insulating housing of the vacuum interrupter (140). The external conductor (142) is connected with a flexible conductor (143). One end of the flexible conductor (143) is connected with the moving contact (141) of the vacuum interrupter (140). The external conductor (142) is electrically connected with the wiring conductor (151).

9. An integrated vacuum circuit breaker for low-frequency AC GIS switchgear according to claim 8, characterized in that, The wiring conductor (151) is connected with a flexible conductor (152), and the flexible conductor (152) is connected with the external conductor (142) by bolts or pins.

10. An integrated vacuum circuit breaker for a low-frequency AC GIS switchgear according to any one of claims 1 to 9, characterized in that, Three vacuum interrupters (140) are arranged side by side.

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