Bus connecting device and gas insulated switchgear

Abstract

The utility model provides a bus connection device and a gas insulated switchgear. The bus connection device comprises a barrel assembly (10), a pull rod (16) and a compensator (20). The pull rod (16) comprises two opposite rod ends (18), and the pull rod (16) extends to penetrate through a pull rod hole in each busbar barrel (12) of the barrel assembly (10) and extend to the two barrel ends (14) of the barrel assembly (10). The rod end (18) is connected to the corresponding barrel end (14) by means of a compensator (20). The compensator (20) comprises a first elastic element (22) and a second elastic element (24). The first elastic element (22) is configured to be elastically compressed when the rod end (18) contracts toward an axial center of the pull rod (16) to compensate for a shortening amount of the pull rod (16). The second elastic element (24) is configured to be elastically compressed when the rod end (18) expands away from the axial center of the tie rod (16) to absorb an amount of elongation of the tie rod (16).

Description

Technical Field

[0001] The present disclosure belongs to the technical field of high-voltage electrical switchgear, and in particular relates to a busbar connection device and a gas-insulated switchgear. Background Art

[0002] Gas-insulated switchgear (GIS) typically consists of a busbar barrel, which houses the busbars, and tie rods. Expansion joints are installed between adjacent busbar barrels to compensate for thermal expansion and contraction and / or installation errors. Tie rods are connected to the busbar barrels to limit the total length of the multiple barrels.

[0003] For example, Chinese utility model patent CN209282712U discloses a gas-insulated metal-enclosed switchgear. The end compensation module is hermetically connected to the side of the gas-insulated metal-enclosed switchgear compartment located at one end of the gas-insulated switchgear opposite to the adjacent gas-insulated metal-enclosed switchgear compartment. One end of the two pull rods is fixedly connected to the end compensation module, and the other end is fixedly connected to the gas-insulated metal-enclosed switchgear compartment located at the other end of the gas-insulated switchgear. In this way, the end compensation module can compensate for the thermal expansion and contraction of the pull rods, so that the gas-insulated metal-enclosed switchgear can operate safely and reliably. However, in the case where the end compensation module includes an expansion joint, the provision of the end compensation module increases the number of expansion joints, making the cost of the gas-insulated metal-enclosed switchgear higher. Utility Model Content

[0004] To solve the above technical problems, the present disclosure provides a busbar connection device, comprising: a cylinder assembly, the cylinder assembly comprising a plurality of busbar cylinders, the plurality of busbar cylinders being connected in series to form two opposite cylinder ends; a pull rod, the pull rod comprising two opposite rod ends, the pull rod extending through the pull rod hole on each of the busbar cylinders and extending to the two cylinder ends; and a compensator, the rod ends being connected to the corresponding cylinder ends through the compensator, the compensator comprising a first elastic element and a second elastic element, the first elastic element being configured to be elastically compressed when the rod end contracts toward the axial center of the pull rod to compensate for the shortening of the pull rod, and the second elastic element being configured to be elastically compressed when the rod end expands away from the axial center of the pull rod to absorb the elongation of the pull rod.

[0005] In the present disclosure, the compensator is provided to compensate for the thermal expansion and contraction of the tie rods, enabling safe and reliable operation of equipment including the busbar connection device. Furthermore, by replacing the terminal compensation module used in the prior art with the compensator, the busbar connection device can be made at a lower cost compared to the prior art.

[0006] Furthermore, the compensator also includes a compensation block, which is arranged between the first elastic element and the second elastic element; in the axial direction of the pull rod, the first elastic element is arranged on the side of the compensation block toward the axial center of the pull rod, and the second elastic element is arranged on the side of the compensation block away from the axial center of the pull rod; the compensation block is configured to press the first elastic element when the rod end contracts toward the axial center of the pull rod, so that the first elastic element is elastically compressed, and to press the second elastic element when the rod end expands away from the axial center of the pull rod, so that the second elastic element is elastically compressed.

[0007] In the present disclosure, by providing a compensation block, the deformation of the pull rod can be transmitted to the first elastic element and the second elastic element via the compensation block, so that the compensator can have a simple and reliable structure.

[0008] Furthermore, the compensator further includes a housing, which accommodates the first elastic element, the second elastic element and the compensation block and is configured to guide the compensation block to move relative to the housing in the axial direction of the pull rod.

[0009] In the present disclosure, by providing a shell, the first elastic element, the second elastic element and the compensation block can be protected by the shell, and the compensation block can move smoothly under the guidance of the shell, so that the compensator has higher reliability.

[0010] Further, the compensation block is fixedly connected to the rod end, and the housing is fixedly connected to the barrel end.

[0011] In the present disclosure, compared with a larger housing, fixedly connecting a smaller compensation block to the tie rod can reduce the load on the tie rod, so that the busbar connection device can have higher reliability.

[0012] Furthermore, a flange is provided at the end of the cylinder, and the shell is provided on the axial end face of the flange; in the axial direction of the pull rod, the entire shell is provided on the side of the flange facing the axial center of the pull rod or away from the axial center of the pull rod.

[0013] In the present disclosure, by arranging the housing on the side of the flange away from the axial center of the tie rod, when the number of rod elements and the number of busbar barrels are the same, the length of each rod element can be roughly equal, thereby facilitating the production of the tie rod. By arranging the housing on the side of the flange toward the axial center of the tie rod, the housing does not occupy additional axial dimension, allowing the entire assembly consisting of the barrel assembly, tie rod, and compensator to have a shorter length, thereby facilitating the miniaturization of the busbar connection device.

[0014] Furthermore, the compensator further includes a connecting rod, the compensation block is connected to the rod end via the connecting rod, and the connecting rod passes through the first elastic element.

[0015] In the present disclosure, by allowing the connecting rod to pass through the first elastic element, the compensator can have a compact structure, which is conducive to miniaturization of the compensator.

[0016] Furthermore, the first elastic element and the second elastic element are disc springs, the connecting rod passes through the first elastic element via a center hole of the first elastic element, and the inner periphery of the first elastic element is spaced apart from the outer periphery of the connecting rod.

[0017] In the present disclosure, by using relatively flat disc springs as the first and second elastic elements, the first and second elastic elements can be relatively small, thereby facilitating miniaturization of the compensator. Furthermore, by spacing the inner periphery of the first elastic element from the outer periphery of the connecting rod, the first elastic element is protected from wear by the connecting rod, thereby maintaining stable performance over a long period of time and having a longer service life.

[0018] Furthermore, the connecting rod is threadedly connected to the compensation block and / or the pull rod.

[0019] In the present disclosure, by threading the connecting rod and the compensating block, the relative position of the connecting rod and the compensating block can be adjusted by the thread, thereby facilitating the connection of the pull rod to the compensator. By threading the connecting rod and the pull rod, the relative position of the connecting rod and the pull rod can be adjusted by the thread, thereby facilitating the connection of the pull rod to the compensator.

[0020] Further, a plurality of the first elastic elements are arranged in series, and / or a plurality of the second elastic elements are arranged in series.

[0021] In the present disclosure, by arranging multiple first elastic elements in series, the configuration of the compensator can be easily adjusted by changing the number of first elastic elements, making the compensator easy to debug. By arranging multiple second elastic elements in series, the configuration of the compensator can be easily adjusted by changing the number of first elastic elements, making the compensator easy to debug.

[0022] Further, one of the two rod ends is connected to the barrel end corresponding to the one rod end via at least one compensator, the other of the two rod ends is connected to the barrel end corresponding to the other rod end via at least another compensator, or only one of the two rod ends is connected to the corresponding barrel end via the compensator.

[0023] In the present disclosure, by providing compensators on both sides of the tie rod, the first and / or second elastic elements in the compensators can experience minimal elastic deformation during installation, making the compensators easier to install. By providing compensators on only one side of the tie rod, the number of compensators is reduced, resulting in a shorter overall length for the cylinder assembly, tie rod, and compensators, thus facilitating miniaturization of the busbar connection device. Furthermore, fewer compensators can reduce the cost of the busbar connection device.

[0024] Furthermore, a plurality of the barrel assemblies are connected in series, and the pull rod and the compensator are respectively provided corresponding to each barrel assembly; a common bus barrel is provided between two adjacent barrel assemblies, and one end of the common bus barrel is formed as the barrel end of one barrel assembly, and the other end of the common bus barrel is formed as the barrel end of another barrel assembly.

[0025] In the present disclosure, by combining the compensator and the common busbar barrel together, there is no need to set expansion joints between the barrel components, thereby reducing the number of expansion joints and further reducing the cost of the busbar connection device.

[0026] The present disclosure further provides a gas-insulated switchgear, comprising: the above-mentioned busbar connection device; and a busbar, wherein the busbar is arranged inside a barrel assembly of the busbar connection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of the present disclosure. The exemplary embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation of the present disclosure. In the drawings:

[0028] Figure 1 is a schematic diagram of a busbar connection device according to a first embodiment of the present disclosure;

[0029] Figure 2 yes Figure 1 A schematic diagram of a compensator of a busbar connection device is shown;

[0030] Figure 3 is a schematic diagram of a busbar connection device according to a second embodiment of the present disclosure;

[0031] Figure 4 is a schematic diagram of a busbar connection device according to a third embodiment of the present disclosure;

[0032] Figure 5 Schematic diagram of a busbar connection device according to the fourth embodiment of the present disclosure.

[0033] Description of Figure Numbers:

[0034] 10. Cylinder assembly;

[0035] 12. Busbar barrel;

[0036] 14. End of the barrel;

[0037] 16. Pull rod;

[0038] 18. Rod end;

[0039] 20. Compensator;

[0040] 22. a first elastic element;

[0041] 24. A second elastic element;

[0042] 26. Compensation block;

[0043] 28. Housing;

[0044] 30. Flange;

[0045] 32. Connecting rod;

[0046] 34. Common busbar barrel;

[0047] 36. Rod element;

[0048] 38. Sleeve;

[0049] 40. End cap;

[0050] 42. Expansion joint. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present disclosure and its application or use. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0052] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form.

[0053] Refer to the following Figure 1 and Figure 2 A first embodiment of the present disclosure is introduced.

[0054] Figure 1is a schematic diagram of a busbar connection device according to the first embodiment of the present disclosure. Figure 2 yes Figure 1 Schematic diagram of the compensator of the busbar connection device is shown.

[0055] Reference Figure 1 and Figure 2 The present disclosure provides a busbar connection device, including a cylinder assembly 10, a tie rod 16 and a compensator 20. The cylinder assembly 10 includes a plurality of busbar cylinders 12. The plurality of busbar cylinders 12 are connected in series and form two opposite cylinder ends 14. The tie rod 16 includes two opposite rod ends 18. The tie rod 16 extends through the tie rod hole on each busbar cylinder 12 and extends to the two cylinder ends 14. The rod ends 18 are connected to the corresponding cylinder ends 14 through the compensator 20. The compensator 20 includes a first elastic element 22 and a second elastic element 24. The first elastic element 22 is configured to be elastically compressed when the rod end 18 contracts toward the axial center of the tie rod 16 to compensate for the shortening of the tie rod 16. The second elastic element 24 is configured to be elastically compressed when the rod end 18 expands away from the axial center of the tie rod 16 to absorb the elongation of the tie rod 16.

[0056] As an example, the busbar connection device may include a plurality of tie rods 16, and the axial directions of the plurality of tie rods 16 are parallel to each other. As an example, the tie rods 16 may include a plurality of rod elements 36, and the plurality of rod elements 36 may be connected in series and form two opposite rod ends 18. For example, adjacent rod elements 36 may be connected to each other by screws. As an example, the tie rods 16 may be slidably connected to the busbar barrel 12, so that the busbar barrel 12 can move axially along the guide of the tie rods 16. In other words, under this configuration, the tie rods 16 can limit the radial movement of the busbar barrel 12. As an example, in the barrel assembly 10, adjacent busbar barrels 12 may be connected to each other via expansion joints 42. For example, the expansion joints 42 may include bellows.

[0057] It should be understood that the tie rod 16 is not limited to including a plurality of rod elements 36. For example, in other examples, the tie rod 16 may also be a single integrally formed part.

[0058] In the present disclosure, the compensator 20 is provided to compensate for the thermal expansion and contraction of the tie rod 16, enabling safe and reliable operation of equipment including the busbar connection device. Furthermore, by replacing the terminal compensation module in the prior art with the compensator 20, the busbar connection device can be made at a lower cost compared to the prior art.

[0059] Reference Figure 1 and Figure 2The compensator 20 further includes a compensation block 26 disposed between the first elastic element 22 and the second elastic element 24. In the axial direction of the pull rod 16, the first elastic element 22 is disposed on a side of the compensation block 26 that faces the axial center of the pull rod 16, and the second elastic element 24 is disposed on a side of the compensation block 26 that faces away from the axial center of the pull rod 16. The compensation block 26 is configured to press against the first elastic element 22 when the rod end 18 contracts toward the axial center of the pull rod 16, thereby elastically compressing the first elastic element 22, and to press against the second elastic element 24 when the rod end 18 expands away from the axial center of the pull rod 16, thereby elastically compressing the second elastic element 24.

[0060] As an example, the first elastic element 22, the second elastic element 24 and the compensation block 26 may be arranged side by side in the axial direction of the pull rod 16. For example, the first elastic element 22, the second elastic element 24 and the compensation block 26 may be arranged coaxially with the pull rod 16.

[0061] In the present disclosure, by providing the compensation block 26 , the deformation of the pull rod 16 can be transferred to the first elastic element 22 and the second elastic element 24 via the compensation block 26 , so that the compensator 20 can have a simple and reliable structure.

[0062] Reference Figure 1 and Figure 2 The compensator 20 further includes a housing 28 . The housing 28 accommodates the first elastic element 22 , the second elastic element 24 and the compensation block 26 , and is configured to guide the compensation block 26 to move relative to the housing 28 in the axial direction of the pull rod 16 .

[0063] As an example, the housing 28 may include a sleeve 38 and two end caps 40, which may be disposed at both ends of the sleeve 38. The first elastic element 22, the second elastic element 24, and the compensation block 26 may be disposed inside the sleeve 38, and the end caps 40 may retain the first elastic element 22, the second elastic element 24, and the compensation block 26 within the sleeve 38. The compensation block 26 may be generally cylindrical and coaxially arranged with the sleeve 38. The outer circumferential surface of the compensation block 26 may mate with the inner circumferential surface of the sleeve 38, so that the compensation block 26 can be guided by the sleeve 38.

[0064] In the present disclosure, by providing the shell 28 , the first elastic element 22 , the second elastic element 24 and the compensation block 26 can be protected by the shell 28 , and the compensation block 26 can move smoothly under the guidance of the shell 28 , so that the compensator 20 has higher reliability.

[0065] Reference Figure 1 and Figure 2, the compensation block 26 is fixedly connected to the rod end 18, and the housing 28 is fixedly connected to the barrel end 14. As an example, the housing 28 can be mounted to the barrel end 14 by fasteners, or can be welded to the barrel end 14.

[0066] In the present disclosure, compared with the larger housing 28 , fixedly connecting the smaller compensation block 26 to the tie rod 16 can reduce the load on the tie rod 16 , thereby enabling the busbar connection device to have higher reliability.

[0067] It should be understood that in other examples, the compensation block 26 may be fixedly connected to the barrel end 14 , while the housing 28 may be fixedly connected to the rod end 18 .

[0068] Reference Figure 1 and Figure 2 The barrel end 14 is provided with a flange 30, and the housing 28 is provided on the axial end surface of the flange 30. In the axial direction of the pull rod 16, the entire housing 28 is provided on a side of the flange 30 away from the axial center of the pull rod 16.

[0069] In the present disclosure, by disposing the housing 28 on a side of the flange 30 away from the axial center of the tie rod 16, when the number of rod elements 36 is the same as the number of busbar barrels 12, the length of each rod element 36 can be substantially equal, thereby facilitating the production of the tie rod 16. In other words, if the housing 28 is disposed axially inwardly of the flange 30, the rod elements 36 located at the ends of the tie rod 16 may be shorter than the rod elements 36 located in the middle of the tie rod 16, resulting in the need to manufacture rod elements 36 of different specifications, thereby increasing the manufacturing cost of the tie rod 16.

[0070] Reference Figure 1 and Figure 2 The compensator 20 further comprises a connecting rod 32 . The compensating block 26 is connected to the rod end 18 via the connecting rod 32 , which passes through the first elastic element 22 .

[0071] In the present disclosure, by allowing the connecting rod 32 to pass through the first elastic element 22 , the compensator 20 can have a compact structure, thereby facilitating miniaturization of the compensator 20 .

[0072] Reference Figure 2 The first elastic element 22 and the second elastic element 24 are disc springs. The connecting rod 32 passes through the first elastic element 22 via the central hole of the first elastic element 22 , and the inner periphery of the first elastic element 22 is spaced apart from the outer periphery of the connecting rod 32 .

[0073] In the present disclosure, by using relatively flat disc springs as the first elastic element 22 and the second elastic element 24, the first elastic element 22 and the second elastic element 24 can have smaller sizes, thereby facilitating the miniaturization of the compensator 20. In addition, by spacing the inner periphery of the first elastic element 22 from the outer periphery of the connecting rod 32, the first elastic element 22 is not worn by the connecting rod 32, allowing the first elastic element 22 to maintain stable performance for a long time and have a longer service life.

[0074] It should be understood that the first elastic element 22 and the second elastic element 24 are not limited to being disc springs. For example, in other examples, the first elastic element 22 and / or the second elastic element 24 can be coil springs.

[0075] Reference Figure 1 and Figure 2 The connecting rod 32 is threadedly connected to the compensation block 26 and / or the pull rod 16. As an example, the connecting rod 32 is threadedly connected to both the compensation block 26 and the pull rod 16. For example, the connecting rod 32 is provided with an external thread, and the compensation block 26 and the pull rod 16 are provided with an internal thread.

[0076] In the present disclosure, by threading the connecting rod 32 to the compensation block 26, the relative position of the connecting rod 32 and the compensation block 26 can be adjusted by the thread, thereby facilitating the connection of the tie rod 16 to the compensator 20. By threading the connecting rod 32 to the tie rod 16, the relative position of the connecting rod 32 and the tie rod 16 can be adjusted by the thread, thereby facilitating the connection of the tie rod 16 to the compensator 20.

[0077] Reference Figure 2 , a plurality of first elastic elements 22 are arranged in series, and / or a plurality of second elastic elements 24 are arranged in series.

[0078] For example, if the first elastic element 22 and the second elastic element 24 are disc springs, adjacent first elastic elements 22 can be arranged in opposite directions, and adjacent second elastic elements 24 can be arranged in opposite directions. In other words, in the axial direction of the pull rod 16, for two adjacent first elastic elements 22, one first elastic element 22 can be arched toward one axial side, while the other first elastic element 22 can be arched toward the other axial side, and the same applies to the second elastic elements 24.

[0079] As an example, the first elastic element 22 and the second elastic element 24 may have the same number and elastic coefficient. Of course, in other examples, the first elastic element 22 and the second elastic element 24 may have different numbers and / or elastic coefficients.

[0080] In the present disclosure, by arranging a plurality of first elastic elements 22 in series, the configuration of the compensator 20 can be easily adjusted by changing the number of first elastic elements 22, making the compensator 20 easy to debug. By arranging a plurality of second elastic elements 24 in series, the configuration of the compensator 20 can be easily adjusted by changing the number of first elastic elements 22, making the compensator 20 easy to debug.

[0081] It should be understood that the first elastic element 22 and the second elastic element 24 are not limited to being arranged in series. For example, in other examples, multiple first elastic elements 22 or multiple second elastic elements 24 can be arranged in parallel. Alternatively, multiple first elastic elements 22 or multiple second elastic elements 24 can form a more complex spring system that includes both series and parallel connections.

[0082] Reference Figure 1 One of the two rod ends 18 is connected to the barrel end 14 corresponding to the one rod end 18 via at least one compensator 20 , and the other of the two rod ends 18 is connected to the barrel end 14 corresponding to the other rod end 18 via at least another compensator 20 .

[0083] In the present disclosure, by providing the compensator 20 on both sides of the pull rod 16 , the first elastic element 22 and / or the second elastic element 24 in the compensator 20 can have a smaller elastic deformation during installation, making the compensator 20 easy to install.

[0084] Refer to the following Figure 3 The second embodiment of the present disclosure is introduced. The second embodiment is a modification of the first embodiment. For features that are the same or similar to those in the first embodiment, the same reference numerals are used in this embodiment and detailed description of these features is omitted.

[0085] Figure 3 Schematic diagram of a busbar connection device according to a second embodiment of the present disclosure.

[0086] Reference Figure 3 The barrel end 14 is provided with a flange 30, and the housing 28 is provided on the axial end surface of the flange 30. In the axial direction of the pull rod 16, the entire housing 28 is provided on one side of the flange 30 toward the axial center of the pull rod 16.

[0087] In the present disclosure, by arranging the shell 28 on the side of the flange 30 facing the axial center of the pull rod 16, the shell 28 does not occupy additional axial dimensions, so that the whole composed of the cylinder assembly 10, the pull rod 16 and the compensator 20 can have a shorter length, which is conducive to the miniaturization of the busbar connection device.

[0088] Refer to the following Figure 4The third embodiment of the present disclosure is introduced. The third embodiment is a modification of the first embodiment. For features that are the same or similar to those in the first embodiment, the same reference numerals are used in this embodiment and detailed description of these features is omitted.

[0089] Figure 4 Schematic diagram of a busbar connection device according to the third embodiment of the present disclosure.

[0090] Reference Figure 4 , only one of the two rod ends 18 ( Figure 4 The rod end 18 on the left side of the rod end 18 is connected to the corresponding barrel end 14 via a compensator 20. In other words, in this configuration, one of the two rod ends 18 can be connected to the corresponding barrel end 14 via at least one compensator 20, and the other of the two rod ends 18 is not connected to the corresponding barrel end 14 via any compensator 20. As an example, the other of the two rod ends 18 ( Figure 4 The rod end 18 on the right side of the center can be rigidly connected to the corresponding barrel end 14 .

[0091] In the present disclosure, by providing a compensator 20 on a single side of the tie rod 16, the number of compensators 20 is reduced, thereby shortening the overall length of the barrel assembly 10, the tie rod 16, and the compensators 20, thereby facilitating miniaturization of the busbar connection device. Furthermore, fewer compensators 20 can also reduce the cost of the busbar connection device.

[0092] Refer to the following Figure 5 The fourth embodiment of the present disclosure is introduced. The fourth embodiment is a modification of the first embodiment. For features that are the same or similar to those in the first embodiment, the same reference numerals are used in this embodiment, and detailed descriptions of these features are omitted.

[0093] Figure 5 Schematic diagram of a busbar connection device according to the fourth embodiment of the present disclosure.

[0094] Reference Figure 5 , multiple cylinder assemblies 10 are connected in series, and a pull rod 16 and a compensator 20 are provided for each cylinder assembly 10. A common busbar cylinder 34 is provided between two adjacent cylinder assemblies 10. One end of the common busbar cylinder 34 (for example, Figure 5 The left end portion in the middle) forms a barrel end portion 14 of a barrel assembly 10 (for example, Figure 5 The barrel end portion 14 on the right side of the barrel assembly 10 on the left side), the other end portion of the common bus barrel 34 (for example, Figure 5 The right end portion in the middle) is formed as the barrel end portion 14 of another barrel assembly 10 (for example, Figure 5The left side barrel end portion 14 of the barrel assembly 10 on the right side in the middle).

[0095] In the present disclosure, by combining the compensator 20 and the common busbar barrel 34 together, no expansion joint (for example, a pressure-balanced expansion joint) is required between the barrel assemblies 10, thereby reducing the number of expansion joints and further reducing the cost of the busbar connection device.

[0096] The present disclosure also provides a gas-insulated switchgear, comprising the above-mentioned busbar connection device and a busbar. The busbar is disposed within a barrel assembly 10 of the busbar connection device. As an example, the barrel assembly 10 may be filled with an insulating gas (e.g., SF6), and the busbar may extend axially within the barrel assembly 10 along a tie rod 16. As an example, the busbar may comprise aluminum or copper.

[0097] The above is only a preferred embodiment of the present disclosure. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present disclosure. These improvements and modifications should also be regarded as within the scope of protection of the present disclosure.

Claims

1. A busbar connection device, characterized in that: include: A barrel assembly (10), the barrel assembly (10) comprising a plurality of bus-bar barrels (12), the plurality of bus-bar barrels (12) being connected in series and forming two opposite barrel ends (14); A tie rod (16), the tie rod (16) including two opposite rod ends (18), the tie rod (16) extending through a tie rod hole on each of the busbar barrels (12) and extending to the two barrel ends (14); and A compensator (20), wherein the rod end (18) is connected to the corresponding tube end (14) through the compensator (20), and the compensator (20) includes a first elastic element (22) and a second elastic element (24), wherein the first elastic element (22) is configured to be elastically compressed when the rod end (18) contracts toward the axial center of the pull rod (16) to compensate for the shortening of the pull rod (16), and the second elastic element (24) is configured to be elastically compressed when the rod end (18) expands away from the axial center of the pull rod (16) to absorb the elongation of the pull rod (16).

2. The busbar connection device according to claim 1, characterized in that: The compensator (20) further includes a compensation block (26), wherein the compensation block (26) is arranged between the first elastic element (22) and the second elastic element (24); In the axial direction of the pull rod (16), the first elastic element (22) is arranged on a side of the compensation block (26) facing the axial center of the pull rod (16), and the second elastic element (24) is arranged on a side of the compensation block (26) away from the axial center of the pull rod (16); The compensation block (26) is configured to press against the first elastic element (22) when the rod end (18) contracts toward the axial center of the pull rod (16), so that the first elastic element (22) is elastically compressed, and to press against the second elastic element (24) when the rod end (18) expands away from the axial center of the pull rod (16), so that the second elastic element (24) is elastically compressed.

3. The busbar connection device according to claim 2, characterized in that: The compensator (20) also includes a housing (28), which accommodates the first elastic element (22), the second elastic element (24) and the compensation block (26), and is configured to guide the compensation block (26) to move relative to the housing (28) in the axial direction of the pull rod (16).

4. The busbar connection device according to claim 3, characterized in that: The compensation block (26) is fixedly connected to the rod end (18), and the housing (28) is fixedly connected to the barrel end (14).

5. The busbar connection device according to claim 4, characterized in that: The barrel end (14) is provided with a flange (30), and the housing (28) is provided on the axial end surface of the flange (30); In the axial direction of the pull rod (16), the housing (28) is arranged on a side of the flange (30) facing the axial center of the pull rod (16) or on a side away from the axial center of the pull rod (16).

6. The busbar connection device according to claim 4, characterized in that: The compensator (20) further comprises a connecting rod (32), the compensating block (26) is connected to the rod end (18) via the connecting rod (32), and the connecting rod (32) passes through the first elastic element (22).

7. The busbar connection device according to claim 6, characterized in that: The first elastic element (22) and the second elastic element (24) are disc springs, the connecting rod (32) passes through the first elastic element (22) via the center hole of the first elastic element (22), and the inner periphery of the first elastic element (22) is spaced apart from the outer periphery of the connecting rod (32).

8. The busbar connection device according to claim 6, characterized in that: The connecting rod (32) is threadedly connected to the compensation block (26) and / or the pull rod (16).

9. The busbar connection device according to any one of claims 1 to 8, characterized in that: A plurality of said first elastic elements (22) are arranged in series, and / or A plurality of the second elastic elements (24) are arranged in series.

10. The busbar connection device according to any one of claims 1 to 8, characterized in that: One of the two rod ends (18) is connected to the barrel end (14) corresponding to the one rod end (18) via at least one compensator (20), and the other of the two rod ends (18) is connected to the barrel end (14) corresponding to the other rod end (18) via at least another compensator (20), or Only one of the two rod ends (18) is connected to the corresponding barrel end (14) via the compensator (20).

11. The busbar connection device according to any one of claims 1 to 8, characterized in that: A plurality of the cylinder assemblies (10) are connected in series, and each cylinder assembly (10) is provided with the pull rod (16) and the compensator (20); A common busbar barrel (34) is provided between two adjacent barrel assemblies (10), one end of the common busbar barrel (34) is formed as the barrel end (14) of one barrel assembly (10), and the other end of the common busbar barrel (34) is formed as the barrel end (14) of the other barrel assembly (10).

12. A gas insulated switchgear, characterized in that: include: The busbar connection device according to any one of claims 1 to 11; as well as A busbar is provided inside the barrel assembly (10) of the busbar connection device.

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