Thermostable vacuum switch tube contact structure

Abstract

The utility model discloses a thermostable vacuum switch tube contact structure, which relates to the technical field of vacuum switch tube contact structures, and comprises a vacuum tube, a sealing sleeve is arranged on the vacuum tube, a static contact and a moving contact are arranged in the vacuum tube, iron core assemblies are arranged on the static contact and the moving contact, one end of the static contact is provided with a static end conducting rod, and the other end of the static end conducting rod is provided with an iron core assembly. One end of the moving contact is provided with a moving conductive rod, and the moving conductive rod is provided with an elastic sheet. According to the utility model, through the arrangement of the elastic sheet, the elastic sheet instantly generates deformation and changes from downward bending to upward bending, so that the moving contact and the static contact are rapidly driven to be separated through the spherical surface, arc generation caused by insufficient contact and separation speed of the moving contact and the static contact is avoided, and the working safety of the contact structure is guaranteed; through the mutual cooperation of the longitudinal groove, the magnet and the arc striking groove, the electric arc is led out through the arc striking groove and enters the longitudinal groove after being generated at the center of the contact, thereby preventing the electric arc from gathering, achieving the rapid arc extinguishing, and improving the breaking capacity.

Description

Technical Field

[0001] This utility model relates to the technical field of vacuum switch tube contact structure, specifically a thermally stable vacuum switch tube contact structure. Background Technology

[0002] Vacuum switch tubes are passive vacuum electrical devices that can be used with various switching mechanisms to form high, medium, and low voltage vacuum electrical appliances, such as vacuum circuit breakers, vacuum load switches, and vacuum contactors. They are widely used in various industrial fields such as metallurgy, petroleum, and electrified railways. Vacuum switch tubes have experienced rapid development due to their advantages, including small size, excellent performance, no pollution, long lifespan, safety, reliability, and suitability for frequent operation.

[0003] However, when existing vacuum switch tubes are making or breaking contact, they are prone to arcing due to insufficient contact and separation speed between contacts, which is not conducive to ensuring the safety of the structure. In addition, the iron plates in the iron core of the contact are generally fixed to the contact by welding, which is a complicated and inconvenient installation process.

[0004] Based on this, a thermally stable vacuum switch tube contact structure is now provided, which can eliminate the drawbacks of existing devices. Utility Model Content

[0005] The purpose of this invention is to provide a thermally stable vacuum switch tube contact structure to solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A thermally stable vacuum switch tube contact structure includes a vacuum tube with a sleeve. A stationary contact and a moving contact are provided inside the vacuum tube. Both the stationary and moving contacts are provided with iron core assemblies. A stationary conductive rod is provided at one end of the stationary contact, and a moving conductive rod is provided at one end of the moving contact. A spring is provided on the moving conductive rod.

[0008] Based on the above technical solutions, this utility model also provides the following optional technical solutions:

[0009] In one alternative: the vacuum tube includes a ceramic tube shell, one end of which is provided with a moving end cover plate, and the other end of which is provided with a stationary end cover plate.

[0010] In one alternative: the sleeve is disposed on the moving end cover plate, the sleeve has a first mounting groove, the first mounting groove has a sealing ring, and the sealing ring is sleeved on the moving conductive rod.

[0011] In one alternative: the stationary contact includes a stationary contact body, which is fixed to one end of the stationary conductive rod. The stationary contact body has a longitudinal groove, and a second mounting groove is provided in the longitudinal groove. A magnet is provided in the second mounting groove.

[0012] In one alternative embodiment: the moving contact includes a moving contact body, which is fixed to one end of a moving conductive rod. One end of the moving contact body is provided with an arc-inducing groove, which is radially distributed.

[0013] In one alternative: the core assembly includes several iron sheets and a mounting shaft, the mounting shaft is fixed to the stationary contact and the moving contact, the mounting shaft is provided with several third mounting grooves, and the iron sheets are installed in the third mounting grooves.

[0014] In one alternative: one end of the stationary end conductive rod passes through the stationary end cover plate and is connected to the stationary end conductive block, and the stationary end conductive block is located on the outside of the stationary end cover plate.

[0015] In one alternative: the moving conductive rod is provided with a thin rod segment, the thin rod segment has spherical surfaces on both sides, the spring is installed at the thin rod segment, and the outer side of the spring is fixedly connected to the inner wall of the ceramic tube shell.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. This utility model uses a spring sheet to instantly deform from bending downwards to bending upwards, thereby quickly separating the moving contact from the stationary contact through the spherical surface. This avoids the generation of an electric arc due to insufficient contact and separation speed between the moving and stationary contacts, and ensures the working safety of the contact structure.

[0018] 2. This utility model, through the cooperation of the longitudinal groove, the magnet and the arc-inducing groove, enables the electric arc to be drawn out through the arc-inducing groove and into the longitudinal groove after it is generated at the center of the contact, thereby preventing the electric arc from accumulating, achieving rapid arc extinguishing and improving breaking capacity.

[0019] 3. This utility model uses an installation shaft to connect multiple iron pieces to form an iron core structure, making installation more convenient. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0022] Figure 3 This is a schematic diagram of the structure of the stationary contact in this utility model.

[0023] Figure 4This is a schematic diagram of the moving contact in this utility model.

[0024] Figure reference numerals: 100, vacuum tube; 101, ceramic tube shell; 102, moving end cover plate; 103, stationary end cover plate; 200, sleeve; 201, first mounting groove; 202, sealing ring; 300, stationary contact; 301, stationary contact body; 302, longitudinal groove; 303, second mounting groove; 304, magnet block; 400, moving contact; 401, moving contact body; 402, arc-starting groove; 500, iron core assembly; 501, iron sheet; 502, mounting shaft; 503, third mounting groove; 600, stationary end conductive rod; 601, stationary end conductive block; 700, moving conductive rod; 701, thin rod segment; 702, spherical surface; 800, spring. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0026] In one embodiment, such as Figure 1 and Figure 2 As shown, a thermally stable vacuum switch tube contact structure includes a vacuum tube 100, a sleeve 200 on the vacuum tube 100, a stationary contact 300 and a moving contact 400 inside the vacuum tube 100, and an iron core assembly 500 on both the stationary contact 300 and the moving contact 400. A stationary conductive rod 600 is provided at one end of the stationary contact 300, and a moving conductive rod 700 is provided at one end of the moving contact 400. A spring piece 800 is provided on the moving conductive rod 700. In use, the spring piece 800 deforms instantaneously from bending downwards to bending upwards, which enables the stationary contact 300 and the moving contact 400 to separate quickly and avoid the generation of an electric arc.

[0027] In one embodiment, such as Figure 1 As shown, the vacuum tube 100 includes a ceramic tube shell 101. One end of the ceramic tube shell 101 is provided with a moving end cover plate 102, and the other end of the ceramic tube shell 101 is provided with a stationary end cover plate 103. The ceramic tube shell 101 has strong thermal stability.

[0028] In one embodiment, such as Figure 2 As shown, the cover 200 is provided on the moving end cover plate 102. The cover 200 has a first mounting groove 201 and a sealing ring 202. The sealing ring 202 is sleeved on the moving conductive rod 700. The moving conductive rod 700 can slide up and down along the cover 200 to ensure that the stationary contact 300 and the moving contact 400 can be effectively separated.

[0029] In one embodiment, such as Figure 3As shown, the stationary contact 300 includes a stationary contact body 301, which is fixed to one end of the stationary conductive rod 600. The stationary contact body 301 is provided with a longitudinal groove 302, and a second mounting groove 303 is provided in the longitudinal groove 302. A magnet block 304 is provided in the second mounting groove 303. The magnet block 304 can quickly attract the generated electric arc to the longitudinal groove to prevent the electric arc from accumulating.

[0030] In one embodiment, such as Figure 4 As shown, the moving contact 400 includes a moving contact body 401, which is fixed to one end of the moving conductive rod 700. One end of the moving contact body 401 is provided with an arc-starting groove 402, which is radially distributed. The arc-starting groove 402 can draw out the electric arc, thereby improving the arc extinguishing speed.

[0031] In one embodiment, such as Figure 4 As shown, the iron core assembly 500 includes several iron pieces 501 and a mounting shaft 502. The mounting shaft 502 is fixed on the stationary contact 300 and the moving contact 400. The mounting shaft 502 is provided with several third mounting grooves 503. The iron pieces 501 are installed in the third mounting grooves 503. Multiple iron pieces 501 are connected by the mounting shaft 502 to form an iron core, making the installation of the iron core more convenient and quick.

[0032] In one embodiment, such as Figure 2 As shown, one end of the stationary end conductive rod 600 passes through the stationary end cover plate 103 and is connected to the stationary end conductive block 601. The stationary end conductive block 601 is located on the outside of the stationary end cover plate 103, and the stationary contact 300 is connected to the external circuit through the stationary end conductive block 601.

[0033] In one embodiment, such as Figure 4 As shown, the moving conductive rod 700 is provided with a thin rod section 701, and spherical surfaces 702 are provided on both sides of the thin rod section 701. The spring piece 800 is installed at the thin rod section 701. The outer side of the spring piece 800 is fixedly connected to the inner wall of the ceramic tube shell 101. When in use, the spring piece instantly deforms from bending downwards to bending upwards, thereby quickly driving the moving conductive rod 700 and the moving contact 400 to move upwards through the spherical surfaces 702, so that the moving contact 400 separates from the stationary contact 300.

[0034] The above embodiment discloses a thermally stable vacuum switch tube contact structure. In use, when the moving conductive rod 700 moves, the spherical surface 702 applies pressure to the spring piece 800, causing the spring piece 800 to deform instantaneously from bending downwards to bending upwards. This quickly drives the moving contact 400 to separate from the stationary contact 300 through the spherical surface 702, avoiding the generation of an electric arc due to insufficient contact and separation speed between the moving contact 400 and the stationary contact 300. When an electric arc is generated, it can be drawn out through the arc-initiating groove 402 and enter the longitudinal groove 302, thereby preventing the electric arc from accumulating and achieving rapid arc extinguishing, ensuring the working safety of the contact structure.

[0035] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A thermally stable vacuum switch tube contact structure, characterized in that, Includes a vacuum tube (100), the vacuum tube (100) is provided with a sleeve (200), the vacuum tube (100) is provided with a stationary contact (300) and a moving contact (400), both the stationary contact (300) and the moving contact (400) are provided with an iron core assembly (500), one end of the stationary contact (300) is provided with a stationary end conductive rod (600), one end of the moving contact (400) is provided with a moving conductive rod (700), and the moving conductive rod (700) is provided with a spring piece (800); The vacuum tube (100) includes a ceramic tube shell (101), one end of which is provided with a moving end cover plate (102), and the other end of which is provided with a stationary end cover plate (103). The cover (200) is provided on the moving end cover plate (102), and the cover (200) is provided with a first mounting groove (201), and a sealing ring (202) is provided in the first mounting groove (201). The sealing ring (202) is sleeved on the moving conductive rod (700). The stationary contact (300) includes a stationary contact body (301), which is fixed to one end of the stationary conductive rod (600). The stationary contact body (301) is provided with a longitudinal groove (302), and a second mounting groove (303) is provided in the longitudinal groove (302). A magnet block (304) is provided in the second mounting groove (303). The moving contact (400) includes a moving contact body (401), which is fixed to one end of the moving conductive rod (700). One end of the moving contact body (401) is provided with an arc-inducing groove (402), which is radially distributed. The core assembly (500) includes several iron pieces (501) and a mounting shaft (502). The mounting shaft (502) is fixed on the stationary contact (300) and the moving contact (400). The mounting shaft (502) is provided with several third mounting grooves (503). The iron pieces (501) are installed in the third mounting grooves (503). One end of the stationary end conductive rod (600) passes through the stationary end cover plate (103) and is connected to the stationary end conductive block (601). The stationary end conductive block (601) is located on the outside of the stationary end cover plate (103). The moving conductive rod (700) is provided with a thin rod section (701), and the thin rod section (701) is provided with spherical surfaces (702) on both sides. The spring piece (800) is installed at the thin rod section (701), and the outer side of the spring piece (800) is fixedly connected to the inner wall of the ceramic tube shell (101).

Images