A vacuum switch tube with a sealing ring

Abstract

The utility model discloses a vacuum switch tube with a sealing ring, and relates to the technical field of vacuum arc extinguishing chambers. The device comprises a ceramic shell, a detachable static end component is provided at the lower end of the ceramic shell, a detachable dynamic end component is provided at the upper end of the ceramic shell, and a one-way gas transmission component for controlling the internal air pressure of the ceramic shell is provided at the upper end of the dynamic end component. The utility model achieves the effect of facilitating the disassembly of the vacuum switch tube by threading a static end conductive block with the ceramic shell, threading a dynamic end cover plate with the ceramic shell, and a shielding cover abutting against a card slot and a card block box. By setting the one-way gas transmission component, the effect of exhausting air from the gas outlet after re-disassembly and reassembly is achieved to form a vacuum inside the ceramic shell, and external gas will not enter the ceramic shell.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum interrupter chambers, in particular to a vacuum switch tube with a sealing ring. Background Art

[0002] The vacuum switch tube is the core component of the medium and high voltage power switch. Its main function is to quickly extinguish the arc and suppress the current after the medium and high voltage circuit is cut off from the power supply through the excellent insulation of the vacuum in the tube, so as to avoid accidents and unexpected events. The vacuum switch tube with a sealing ring is a vacuum switch tube that replaces the first welding end and the second welding end to bear the force when the bellows is deformed, thereby ensuring the service life of the welding seal. However, the existing vacuum switch tube with a sealing ring usually adopts an integrated structure, which is not convenient for disassembly and maintenance. For example, a vacuum switch tube with a sealing ring recorded in the patent announcement number CN215869118U A vacuum switch tube with a ring, wherein the first sealing section is tightened by the first sealing ring and squeezed against the outer periphery of the moving contact with high strength, and the second sealing section is tightened by the second sealing ring and squeezed against the outer periphery of the pressure ring with high strength. Since the first welding end is arranged at the first sealing section away from the corrugated section, and the second welding end is arranged at the second sealing section away from the corrugated section, the deformation force generated during the deformation of the corrugated section will be borne by the first sealing ring and the second sealing ring, so that no deformation occurs at the first welding end and the second welding end. However, the vacuum switch tube with the sealing ring is an integrated structure, which is not convenient for disassembly, assembly and maintenance.

[0003] Based on this, a vacuum switch tube with a sealing ring is now provided, which can eliminate the disadvantages of the existing device. Utility Model Content

[0004] The utility model aims to provide a vacuum switch tube with a sealing ring to solve the problem that the existing vacuum switch tube with a sealing ring is an integrated structure and is not convenient for disassembly, assembly and maintenance.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A vacuum switch tube with a sealing ring comprises a ceramic shell, a detachable static end assembly is provided at the lower end of the ceramic shell, a detachable moving end assembly is provided at the upper end of the ceramic shell, and a one-way gas transmission assembly for controlling the internal air pressure of the ceramic shell is provided at the upper end of the moving end assembly.

[0007] On the basis of the above technical solutions, the present invention also provides the following optional technical solutions:

[0008] In an optional solution: the static end assembly includes a static end conductive block, a static end conductive rod and a static contact, the static end conductive block is provided at the bottom of the ceramic shell, the static end conductive rod is provided on the static end conductive block, and the static end conductive rod is provided at the upper end of the static end conductive rod.

[0009] In an optional scheme: the moving end assembly includes a bellows, a moving contact, a first pressure ring, a moving end cover plate, a clamping block, a second pressure ring, a first sealing ring and a second sealing ring, the moving end cover plate is arranged at the upper end of the ceramic shell, the lower end of the moving end cover plate is provided with a clamping block, the lower end of the moving end cover plate is provided with a first pressure ring, the lower end of the moving end cover plate is also provided with a bellows, the lower end of the bellows is provided with a moving contact, the upper end of the moving contact is provided with a second pressure ring, the upper and lower ends of the bellows are respectively provided with a first sealing ring and a second sealing ring, and the first sealing ring and the second sealing ring are respectively arranged inside the second pressure ring and the first pressure ring.

[0010] In an optional solution: the one-way gas delivery component includes a valve housing, a valve seat, a connecting rod, a limit seat, a steel ball, an air inlet, and an air outlet. A valve seat is provided inside the valve housing, a plurality of connecting rods are provided on the right side of the valve seat, a limit seat is provided on the right side of the connecting rod, a steel ball slides inside the valve seat, an air inlet is provided on the left side of the valve housing, and an air exhaust port is provided on the right side of the valve housing.

[0011] In an optional solution: the air outlet is vertically upward.

[0012] In an optional solution: the static end conductive block is threadedly connected to the ceramic shell, and the dynamic end cover plate is threadedly connected to the ceramic shell.

[0013] In an optional solution: a slot is provided at the bottom of the ceramic housing.

[0014] In an optional solution: a shielding cover is provided inside the ceramic shell and abuts against the card slot and the card block.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. The utility model achieves the effect of facilitating the disassembly of the vacuum switch tube by threading the static end conductive block with the ceramic shell, threading the movable end cover plate with the ceramic shell, and abutting the shield cover with the card slot and the card block box.

[0017] 2. The utility model provides a one-way gas transmission component, so that after reassembly, air is extracted from the gas outlet to form a vacuum inside the ceramic shell, and external gas does not enter the ceramic shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] Figure 2 It is a structural schematic diagram of the static end component of the utility model.

[0020] Figure 3 It is a structural schematic diagram of the moving end component of the utility model.

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

[0022] Figure 5 It is a structural schematic diagram of the one-way gas transmission component of the utility model.

[0023] Figure 6 It is a schematic diagram of the internal structure of the one-way gas transmission component of the utility model.

[0024] Figure 7 It is a schematic diagram of the structure inside the ceramic shell of the utility model.

[0025] Figure 8 It is a cross-sectional structural schematic diagram of the utility model.

[0026] Notes on figure numbers: 100, ceramic shell; 101, slot; 102, shielding cover; 200, static end assembly; 201, static end conductive block; 202, static end conductive rod; 203, static contact; 300, moving end assembly; 301, bellows; 302, moving contact; 303, first pressure ring; 304, moving end cover; 305, block; 306, second pressure ring; 307, first sealing ring; 308, second sealing ring; 400, one-way gas transmission assembly; 401, valve housing; 402, valve seat; 403, connecting rod; 404, limit seat; 405, steel ball; 406, air inlet; 407, air outlet. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0028] Example 1

[0029] In one embodiment, Figure 1-Figure 8 As shown, a vacuum switch tube with a sealing ring includes a ceramic shell 100, a detachable static end assembly 200 is provided at the lower end of the ceramic shell 100, a detachable dynamic end assembly 300 is provided at the upper end of the ceramic shell 100, and a one-way gas supply assembly 400 for controlling the internal air pressure of the ceramic shell 100 is provided at the upper end of the dynamic end assembly 300. By disassembling the static end assembly 200 and the dynamic end assembly 300, the internal parts can be easily repaired or replaced, and the interior of the ceramic shell 100 can be evacuated after reassembly through the one-way gas supply assembly 400.

[0030] In one embodiment, Figure 2As shown, the static end assembly 200 includes a static end conductive block 201, a static end conductive rod 202 and a static contact 203. The static end conductive block 201 is threadedly connected to the ceramic shell 100. The static end conductive block 201 is provided at the bottom of the ceramic shell 100. The static end conductive rod 202 is provided on the static end conductive block 201. The static end conductive rod 202 is provided at the upper end of the static end conductive rod 202. The static end assembly 200 can be separated from the ceramic shell 100 by rotating the static end conductive block 201.

[0031] In one embodiment, Figure 3 As shown, the movable end assembly 300 includes a bellows 301, a movable contact 302, a first pressure ring 303, a movable end cover plate 304, a clamping block 305, a second pressure ring 306, a first sealing ring 307 and a second sealing ring 308. The movable end cover plate 304 is threadedly connected to the ceramic housing 100. The movable end cover plate 304 is arranged at the upper end of the ceramic housing 100. A clamping block 305 is provided at the lower end of the movable end cover plate 304. A first pressure ring 303 is provided at the lower end of the movable end cover plate 304. The movable end cover plate A bellows 301 is also provided at the lower end of 304, a moving contact 302 is provided at the lower end of the bellows 301, a second pressure ring 306 is provided at the upper end of the moving contact 302, a first sealing ring 307 and a second sealing ring 308 are provided at the upper and lower ends of the bellows 301, respectively, the first sealing ring 307 and the second sealing ring 308 are respectively arranged inside the second pressure ring 306 and the first pressure ring 303, and the moving end assembly 300 can be easily separated from the ceramic shell 100 by rotating the moving end cover plate 304.

[0032] In one embodiment, Figure 5 and Figure 6 As shown, the one-way gas transmission component 400 includes a valve housing 401, a valve seat 402, a connecting rod 403, a limit seat 404, a steel ball 405, an air inlet 406, and an air outlet 407. A valve seat 402 is provided inside the valve housing 401, a plurality of connecting rods 403 are provided on the right side of the valve seat 402, a limit seat 404 is provided on the right side of the connecting rod 403, a steel ball 405 slides inside the valve seat 402, an air inlet 406 is provided on the left side of the valve housing 401, and an air outlet 407 is provided on the right side of the valve housing 401. After the vacuum switch tube is reassembled, an air pump is used to connect the air outlet 407 to vacuum the inside of the ceramic housing 100. When the negative pressure inside the ceramic housing 100 reaches a specified value, the air pump is disconnected, and the steel ball 405 moves downward under the suction of the negative pressure inside the ceramic housing 100, blocking the hole at the bottom of the valve seat 402 to prevent gas from entering.

[0033] Example 2

[0034] In one embodiment, Figure 7 and Figure 8As shown, a slot 101 is provided at the bottom of the ceramic housing 100 , and a shielding cover 102 is provided inside the ceramic housing 100 to abut against the slot 101 and the block 305 . The shielding cover 102 can prevent the ceramic housing 100 from being damaged by an internal arc.

[0035] The above embodiment discloses a vacuum switch tube with a sealing ring. When the vacuum switch tube needs to be dismantled and repaired, the moving end assembly 300 can be easily separated from the ceramic shell 100 by rotating the moving end cover plate 304, and the static end assembly 200 can be separated from the ceramic shell 100 by rotating the static end conductive block 201, so that the internal parts can be replaced or repaired. After reinstalling the vacuum switch tube, a vacuum pump is used to connect the air outlet 407 to vacuum the inside of the ceramic shell 100. When the negative pressure inside the ceramic shell 100 reaches a specified value, the vacuum pump is disconnected, and the steel ball 405 moves downward under the suction of the negative pressure inside the ceramic shell 100, blocking the hole at the bottom of the valve seat 402 to prevent gas from entering.

[0036] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A vacuum switch tube with a sealing ring, comprising a ceramic housing (100), characterized in that: A detachable static end assembly (200) is provided at the lower end of the ceramic housing (100), a detachable dynamic end assembly (300) is provided at the upper end of the ceramic housing (100), and a one-way gas transmission assembly (400) for controlling the internal gas pressure of the ceramic housing (100) is provided at the upper end of the dynamic end assembly (300); The static end assembly (200) comprises a static end conductive block (201), a static end conductive rod (202) and a static contact (203); the static end conductive block (201) is provided at the bottom of the ceramic housing (100); the static end conductive rod (202) is provided on the static end conductive block (201); and the static contact (203) is provided at the upper end of the static end conductive rod (202); The movable end assembly (300) comprises a bellows (301), a movable contact (302), a first pressure ring (303), a movable end cover plate (304), a clamping block (305), a second pressure ring (306), a first sealing ring (307) and a second sealing ring (308); the movable end cover plate (304) is arranged at the upper end of the ceramic housing (100); a clamping block (305) is provided at the lower end of the movable end cover plate (304); and a first pressure ring (303) is provided at the lower end of the movable end cover plate (304). A bellows (301) is further provided at the lower end of the movable end cover plate (304), a movable contact (302) is provided at the lower end of the bellows (301), a second pressure ring (306) is provided at the upper end of the movable contact (302), a first sealing ring (307) and a second sealing ring (308) are respectively provided at the upper and lower ends of the bellows (301), and the first sealing ring (307) and the second sealing ring (308) are respectively arranged inside the second pressure ring (306) and the first pressure ring (303); The one-way gas transmission component (400) comprises a valve housing (401), a valve seat (402), a connecting rod (403), a limit seat (404), a steel ball (405), an air inlet (406), and an air outlet (407). A valve seat (402) is provided inside the valve housing (401), a plurality of connecting rods (403) are provided on the right side of the valve seat (402), a limit seat (404) is provided on the right side of the connecting rod (403), a steel ball (405) slides inside the valve seat (402), an air inlet (406) is provided on the left side of the valve housing (401), and an air outlet (407) is provided on the right side of the valve housing (401).

2. A vacuum switch tube with a sealing ring according to claim 1, characterized in that: The air outlet (407) faces vertically upward.

3. The vacuum switch tube with a sealing ring according to claim 1, characterized in that: The static end conductive block (201) is threadedly connected to the ceramic housing (100), and the dynamic end cover plate (304) is threadedly connected to the ceramic housing (100).

4. The vacuum switch tube with a sealing ring according to claim 1, characterized in that: A slot (101) is provided at the bottom of the ceramic housing (100).

5. The vacuum switch tube with a sealing ring according to claim 1, characterized in that: A shielding cover (102) is provided inside the ceramic housing (100) and is in contact with the card slot (101) and the card block (305).

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