Shielding cylinder for vacuum arc-extinguishing chamber

Abstract

The utility model relates to the technical field of arc extinguish chambers, and discloses a shielding cylinder for a vacuum arc extinguish chamber, which comprises a shell and a shielding cylinder body, the shielding cylinder body is arranged in the shell, a fixing assembly is arranged between the shell and the shielding cylinder body, and through the design of a buffer spring and a buffer plate, a connecting part can be protected from being influenced by external force, and the service life of the vacuum arc extinguish chamber is prolonged. The first rack and the second rack can adaptively adjust the position of the shielding cylinder body and adapt to the temperature change, so that the stability of the connecting part is ensured, and the problem of thermal expansion and cold contraction possibly caused by loosening or cracks is avoided; the fault rate of the connecting part can be reduced, and the maintenance requirement for the connecting part is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of arc extinguishing chambers, in particular to a shielding tube for a vacuum arc extinguishing chamber. Background Art

[0002] A vacuum interrupter is a device used in high-voltage electrical equipment to extinguish arcs generated in high-voltage switches. In electrical equipment, arcs may occur when a circuit is disconnected or connected. In order to ensure the safe and reliable operation of electrical equipment, these arcs need to be extinguished in a timely manner. A vacuum interrupter is a common device used for this purpose.

[0003] The vacuum interrupter creates a vacuum environment inside the chamber, which allows the arc to be extinguished quickly. This device is usually part of high-voltage electrical equipment, such as circuit breakers, and is commonly used in transmission systems, substations, and other electrical equipment in the industrial field.

[0004] The shield cylinder usually refers to a component in the vacuum interrupter, which is used to control and guide the arc. In the vacuum interrupter, when an arc occurs, the shield cylinder can help guide the arc to the appropriate position to ensure that the arc is effectively extinguished.

[0005] Existing shielding tubes are usually fixed to the internal structure of the vacuum interrupter by bolts, welding or other fixing methods. However, in the vacuum interrupter, high temperature may be generated during the arc extinguishing process, and the temperature will drop when the equipment is cooled later. This temperature change may cause thermal expansion and contraction of the welded parts or bolted joints, thereby causing loosening or cracks in the connected parts. Therefore, it does not meet the existing needs. We have proposed a shielding tube for a vacuum interrupter. Utility Model Content

[0006] The utility model provides a shielding tube for a vacuum arc extinguishing chamber, which can adaptively adjust the position of the shielding tube body to adapt to temperature changes, thereby ensuring the beneficial effect of the stability of the connecting part, and solving the problem mentioned in the above background technology that in the vacuum arc extinguishing chamber, high temperature may be generated during the arc extinguishing process, and the temperature will drop when the equipment is cooled later. This temperature change may cause thermal expansion and contraction of the welding part or the bolt connection, thereby causing loosening or cracking of the connecting part.

[0007] The utility model provides the following technical solution: a shielding cylinder for a vacuum arc extinguishing chamber, comprising an outer shell and a shielding cylinder body, wherein the shielding cylinder body is arranged in the outer shell, and a fixing assembly is arranged between the outer shell and the shielding cylinder body;

[0008] The fixing assembly includes an annular groove opened in the outer shell and corresponding to the shielding tube body. The shielding tube body is installed in the annular groove. A plurality of limit rods are installed in the annular groove. A buffer spring is sleeved on the limit rod. A buffer plate is connected to the end of the buffer spring. The buffer plate is in contact with the outer wall of the shielding tube body.

[0009] As an optional solution for the shielding tube for the vacuum arc extinguishing chamber described in the utility model, the fixing assembly also includes a first rack arranged in the annular groove, the first rack is located on the upper side of the buffer plate, and a second rack corresponding to the first rack is arranged on the shielding tube body, and the first rack is meshed with the second rack.

[0010] As an optional scheme for the shielding tube for the vacuum arc extinguishing chamber described in the utility model, wherein: the width of the first rack corresponds to the groove depth of the annular groove, and the width of the second rack corresponds to the wall thickness of the shielding tube.

[0011] As an optional scheme for the shielding tube for the vacuum arc extinguishing chamber described in the utility model, wherein: a slot is opened in the buffer plate, a plug rod corresponding to the slot is fixedly installed outside the shielding tube body, and the limit rod is plugged into the slot.

[0012] As an optional scheme for the shielding tube for the vacuum arc extinguishing chamber described in the utility model, wherein: the height of the buffer plate is smaller than the height of the shielding tube body, a groove is opened in the shielding tube body, a spring piece is arranged in the groove, and the spring piece is located at the bottom side of the limit rod.

[0013] As an optional scheme for the shielding tube for the vacuum arc extinguishing chamber described in the utility model, wherein: the end of the spring sheet away from the insertion rod is fixedly installed in the embedding groove, and the end of the spring sheet close to the insertion rod is tilted toward the outside of the shielding tube body.

[0014] As an optional solution for the shielding tube for the vacuum arc extinguishing chamber described in the utility model, the number of the spring pieces corresponds to the number of the buffer plates, and the thickness of the spring pieces is smaller than the depth of the embedding groove.

[0015] The utility model has the following beneficial effects:

[0016] 1. The shielding tube for the vacuum arc extinguishing chamber is designed with a buffer spring and a buffer plate, which helps to protect the connection part from external forces, reduces the stress and vibration of the connection parts, and extends its service life. The first rack and the second rack can adaptively adjust the position of the shielding tube body to adapt to temperature changes, thereby ensuring the stability of the connection part and avoiding thermal expansion and contraction problems that may cause loosening or cracks. The design of the fixed component can reduce the failure rate of the connection part and reduce the maintenance requirements of the connection part.

[0017] 2. The shielding tube for the vacuum arc extinguishing chamber can further enhance the stability of the connection part by arranging grooves and installing spring pieces in the shielding tube body and tilting the spring pieces. When thermal expansion and contraction occur, the flexibility of the spring pieces can adaptively adjust the position of the connection part to ensure the fastening force and stability of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the main three-dimensional structure of the utility model.

[0019] Figure 2 It is a schematic diagram of the main body cutaway structure of the utility model.

[0020] Figure 3 It is a partially cutaway structural schematic diagram of the utility model.

[0021] Figure 4 It is a schematic diagram of the top view of the cutaway structure of the utility model.

[0022] Figure 5 It is a schematic diagram of the enlarged structure of point A of the utility model.

[0023] In the figure: 100, shell; 200, shielding tube body; 210, second rack; 220, limit rod; 300, fixing assembly; 310, annular groove; 311, first rack; 320, plug rod; 321, buffer spring; 330, buffer plate; 331, slot; 340, embedded groove; 341, spring piece. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Embodiment 1: This embodiment is intended to promote the solution of the problem that in a vacuum interrupter, since the arc extinguishing process may generate high temperature, and the temperature will drop when the equipment is cooled later, this temperature change may cause the thermal expansion and contraction of the welding part or the bolt connection, thereby causing the connection part to loosen or crack. Please refer to Figure 1 - Figure 5 A shielding tube for a vacuum interrupter comprises a shell 100 and a shielding tube body 200. The shielding tube body 200 is arranged in the shell 100. A fixing assembly 300 is arranged between the shell 100 and the shielding tube body 200.

[0026] The fixing assembly 300 includes an annular groove 310 corresponding to the shielding tube body 200 and opened in the housing 100. The shielding tube body 200 is installed in the annular groove 310. A plurality of limiting rods 220 are installed in the annular groove 310. The limiting rods 220 are sleeved with buffer springs 321. The ends of the buffer springs 321 are connected to buffer plates 330. The buffer plates 330 are in contact with the outer wall of the shielding tube body 200. The design of the buffer springs 321 and the buffer plates 330 can reduce the impact and transmit it to the connection part when the temperature drops or the equipment is running, and protect the connection part from the influence of external forces.

[0027] The fixing assembly 300 also includes a first rack 311 disposed in the annular groove 310, the first rack 311 is located on the upper side of the buffer plate 330, and a second rack 210 corresponding to the first rack 311 is disposed on the shielding tube body 200, and the first rack 311 is meshed with the second rack 210. The width of the first rack 311 corresponds to the groove depth of the annular groove 310, and the width of the second rack 210 corresponds to the wall thickness of the shielding tube body 200. A slot 331 is provided in the buffer plate 330, and an insertion rod 320 corresponding to the slot 331 is fixedly installed outside the shielding tube body 200, and the limiting rod 220 is plugged into the slot 331.

[0028] When high temperature occurs in the vacuum interrupter, the shielding tube body 200 can be adaptively fine-tuned due to thermal expansion. Since the width of the first rack 311 corresponds to the groove depth of the annular groove 310, and the width of the second rack 210 corresponds to the wall thickness of the shielding tube, when the temperature changes, the fixing assembly 300 can adaptively adjust the position of the shielding tube body 200, thereby avoiding loosening or cracking of the connection part caused by thermal expansion and contraction. In addition, the buffer spring 321 and the buffer plate 330 can also alleviate the impact caused by temperature changes, thereby ensuring the safety of the connection part.

[0029] In this embodiment: the design of the buffer spring 321 and the buffer plate 330 helps to protect the connection part from external forces, reduces the stress and vibration of the connection parts, and extends its service life. The first rack 311 and the second rack 210 can adaptively adjust the position of the shielding tube body 200 to adapt to temperature changes, thereby ensuring the stability of the connection part and avoiding thermal expansion and contraction problems that may cause loosening or cracks. The design of the fixing component 300 can reduce the failure rate of the connection part and reduce the maintenance requirements of the connection part.

[0030] Embodiment 2: This embodiment is intended to promote the solution of the problem that in the vacuum interrupter, the arc extinguishing process may generate high temperature, and the temperature will drop when the equipment is cooled later. This temperature change may cause the thermal expansion and contraction of the welding part or the bolt connection, thereby causing the loosening or cracking of the connection part. This embodiment is an improvement made on the basis of embodiment 1. For details, please refer to Figure 1 - Figure 5 .

[0031] The height of the buffer plate 330 is smaller than the height of the shielding tube body 200. The shielding tube body 200 is provided with an embedding groove 340, and a spring piece 341 is provided in the embedding groove 340. The spring piece 341 is located at the bottom side of the limiting rod 220. The end of the spring piece 341 away from the insertion rod 320 is fixedly installed in the embedding groove 340, and the end of the spring piece 341 close to the insertion rod 320 is tilted toward the outside of the shielding tube body 200. The number of the spring pieces 341 corresponds to the number of the buffer plates 330, and the thickness of the spring piece 341 is smaller than the groove depth of the embedding groove 340.

[0032] When the temperature drops, the spring piece 341 can reduce the stress on the connection part and disperse it to the adjacent area, thereby reducing the risk of loosening or cracking of the connection part. At the same time, the spring piece 341 set in the groove 340 can play a certain shock absorption and buffering function, reducing the impact of external forces on the connection part. This helps to protect the connection part from damage caused by impact and other external forces during the operation of the equipment, and improves the life and stability of the connection parts.

[0033] In this embodiment: by providing an embedding groove 340 and installing a spring sheet 341 in the shielding tube body 200, and making the spring sheet 341 tilt up, the stability of the connection part can be further enhanced. When thermal expansion and contraction occur, the flexibility of the spring sheet 341 can adaptively adjust the position of the connection part to ensure the tightness and stability of the connection.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0035] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the technology of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A shielding tube for a vacuum interrupter, comprising a housing (100) and a shielding tube body (200), characterized in that: The shielding cylinder body (200) is arranged in the shell (100), and a fixing assembly (300) is arranged between the shell (100) and the shielding cylinder body (200); The fixing assembly (300) includes an annular groove (310) opened in the shell (100) and corresponding to the shielding tube body (200); the shielding tube body (200) is installed in the annular groove (310); a plurality of limit rods (220) are installed in the annular groove (310); a buffer spring (321) is sleeved on the limit rod (220); a buffer plate (330) is connected to the end of the buffer spring (321); and the buffer plate (330) is in contact with the outer wall of the shielding tube body (200).

2. The shielding tube for a vacuum interrupter according to claim 1, characterized in that: The fixing assembly (300) further includes a first rack (311) disposed in the annular groove (310), wherein the first rack (311) is located on the upper side of the buffer plate (330), and a second rack (210) corresponding to the first rack (311) is disposed on the shielding tube body (200), and the first rack (311) is meshed with the second rack (210).

3. The shielding tube for vacuum interrupter according to claim 2, characterized in that: The width of the first rack (311) corresponds to the groove depth of the annular groove (310), and the width of the second rack (210) corresponds to the wall thickness of the shielding cylinder body (200).

4. The shielding tube for vacuum interrupter according to claim 1, characterized in that: A slot (331) is provided in the buffer plate (330), and an insertion rod (320) corresponding to the slot (331) is fixedly mounted outside the shielding tube body (200), and the insertion rod (320) is plugged into the slot (331).

5. The shielding tube for vacuum interrupter according to claim 4, characterized in that: The height of the buffer plate (330) is smaller than the height of the shielding tube body (200); an embedding groove (340) is provided in the shielding tube body (200); a spring sheet (341) is provided in the embedding groove (340); and the spring sheet (341) is located at the bottom side of the insertion rod (320).

6. The shielding tube for vacuum interrupter according to claim 5, characterized in that: One end of the spring sheet (341) away from the insertion rod (320) is fixedly installed in the embedding groove (340), and one end of the spring sheet (341) close to the insertion rod (320) is tilted toward the outside of the shielding tube body (200).

7. The shielding tube for a vacuum interrupter according to claim 5, characterized in that: The number of the spring sheets (341) corresponds to the number of the buffer plates (330), and the thickness of the spring sheets (341) is smaller than the depth of the embedding groove (340).

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