A safe and impact-resistant vacuum interrupter

Abstract

The application discloses a safe and impact-resistant vacuum arc-extinguishing chamber and particularly relates to the technical field of vacuum arc-extinguishing chambers, which comprises a ceramic shell, the upper surface of the ceramic shell is fixedly connected with the lower surface of a static-end conductive block, the lower surface of the static-end conductive block is provided with a static-end conductive rod, the bottom end of the static-end conductive rod is fixedly connected with a static contact, and the ceramic shell is provided with a moving contact. The vacuum arc-extinguishing chamber is not prone to poor contact after installation, and the supporting rods can effectively prevent external objects from contacting the ceramic shell after assembly, so that the impact between external hard objects and the arc-extinguishing chamber and the resulting breakage and air leakage of the arc-extinguishing chamber are reduced, the breakage of the vacuum arc-extinguishing chamber caused by surface cracks and the resulting internal heating are reduced, and the actual use of the vacuum arc-extinguishing chamber after assembly is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vacuum interrupter, more particularly, the present application relates to a safe and impact-resistant vacuum interrupter. BACKGROUND

[0002] With the continuous development of the electric power industry and the increasing demand for environmental protection, vacuum interrupters are developing towards high-voltage power transmission and distribution, and switchgear using vacuum interrupters is also developing towards high-voltage and miniaturization. The volume of the vacuum interrupter is an important factor for the overall volume of the switchgear, therefore, the high-voltage and miniaturization of the vacuum interrupter is the basis for the miniaturization of the switchgear.

[0003] At present, most of the vacuum interrupters need to be directly installed between the upper end main contact and the upper arc contact through the table belt, however, after installation, the vacuum interrupter as a whole needs to be assembled, and after axial installation, positioning is often needed through welding or other methods, which leads to misalignment or poor contact of the vacuum interrupter during assembly, resulting in the impact between the external hard object and the interrupter during assembly, causing the interrupter to break and leak, and reducing the risk of the ceramic breaking due to the scratch of the aluminum porcelain shell during the breaking process. SUMMARY

[0004] In order to overcome the above-mentioned defects of the prior art, the present application provides a safe and impact-resistant vacuum interrupter, and the technical problems to be solved by the present application are: at present, most of the vacuum interrupters need to be directly installed between the upper end main contact and the upper arc contact through the table belt, however, after installation, the vacuum interrupter as a whole needs to be assembled, and after axial installation, positioning is often needed through welding or other methods, which leads to misalignment or poor contact of the vacuum interrupter during assembly, resulting in the impact between the external hard object and the interrupter during assembly, causing the interrupter to break and leak, and reducing the risk of the ceramic breaking due to the scratch of the aluminum porcelain shell during the breaking process.

[0005] In order to achieve the above object, the present application provides the following technical scheme: A safe and impact-resistant vacuum arc-extinguishing chamber, comprising a ceramic shell, the upper surface of the ceramic shell is fixedly connected with the lower surface of a static end conductive block, the lower surface of the static end conductive block is provided with a static end conductive rod, the bottom end of the static end conductive rod is fixedly connected with a static contact, a moving contact is arranged in the ceramic shell, the moving contact is below the static contact, the lower surface of the moving contact is fixedly connected with a connecting device, the outer surface of the connecting device is clamped in a moving end cover plate, the moving end cover plate is clamped on the lower surface of the ceramic shell, the lower surface of the moving end cover plate is fixedly connected with a support, the moving end cover plate is fixedly connected with the upper surface of a positioning screw nut through the support, a dynamic conductive rod is threadedly connected in the positioning screw nut, the lower surface of the moving end cover plate is fixedly connected with a plurality of retainer holders, the front surface and the back surface of the inner wall of the retainer holder are fixedly connected with one end of the front surface and one end of the back surface of a rotating shaft respectively, the outer surface of the rotating shaft is sleeved with a bearing, the outer surface of the bearing is fixedly connected with an adjusting rod, the upper surface of the adjusting rod is fixedly connected with a support rod, and the top end of the plurality of support rods is fixedly connected with a positioning plate.

[0006] As a further scheme of the present application: the right side surface of the positioning plate is fitted with the outer surface of the ceramic shell, the right end of the adjusting rod is fixedly connected with a pressing plate, the pressing plate is above the positioning screw nut, the lower surface of the pressing plate is fixedly connected with a retaining block, the upper surface of the retaining block is provided as an inclined surface, and the left side surface of the retaining block is fixedly connected with the right end of the adjusting rod.

[0007] As a further scheme of the present application: the opposite surfaces of the static contact and the moving contact are fixedly connected with a sliding sleeve respectively, and a sliding rod is slidingly connected in each of the two sliding sleeves, and one end of the opposite surfaces of the two sliding rods is fixedly connected with the surface away from the two contact assemblies respectively.

[0008] As a further scheme of the present application: a spring is arranged in the sliding sleeve, a plurality of guide pipes are fixedly connected with the outer surface of the sliding sleeve, the sliding sleeve is connected with a plurality of protective shells through the plurality of guide pipes respectively, and the lower surface of the protective shell and the outer surface of the guide pipe are fixedly connected with the upper surface of the moving contact.

[0009] As a further scheme of the present application: the upper surface of the protective shell is provided with a mounting hole, an expansion block is fixedly connected in the mounting hole of the upper surface of the protective shell, the expansion block is connected with the guide pipe through the protective shell, the expansion block is provided as a high-temperature-resistant expansion block, and the sliding sleeve and the sliding rod are made of copper-chromium alloy.

[0010] As a further scheme of the present application: the outer surface of the positioning plate is provided as a curved surface, the outer surface of the positioning plate is provided with an anti-skid pattern, a shielding cylinder is arranged in the ceramic shell, and a reinforcing plate is fixedly connected with the left and right side surfaces of the inner wall of the plurality of retainer holders.

[0011] As a further scheme of the present application: the connecting device comprises a movable end conductive rod, the top end of the movable end conductive rod is fixedly connected with the lower surface of the movable contact, the bottom end of the movable end conductive rod is fixedly connected with the top end of the bellows, and the bellows is clamped in the movable end cover plate.

[0012] The present application has the following beneficial effects:

[0013] 1、The present application sets up support, positioning screw nut, extrusion plate, positioning plate and retainer, when the movable conductive rod passes through the positioning screw nut and contacts with the extrusion plate, the extrusion plate will move upward, and the adjusting rod will turn along the rotation shaft with the movement of the extrusion plate, at this time, the supporting rods will tilt with the rotation of the adjusting rod, and with the movement of the supporting rods, the positioning plate will be separated from the surface of the ceramic shell and contact with the inner wall of the pipeline of the installation part, so that the vacuum arc-extinguishing chamber can be positioned by the positioning plate on its surface during installation, reducing the dislocation of the vacuum arc-extinguishing chamber due to touching or extrusion during subsequent assembly, so that the vacuum arc-extinguishing chamber is not prone to poor contact after installation, and after assembly, the ceramic shell is provided with a plurality of supporting rods, so that the supporting rods can effectively contact the ceramic shell with external objects, thereby reducing the impact between external hard objects and the arc-extinguishing chamber, preventing the ceramic shell from being cracked by external impact, reducing the risk of the vacuum arc-extinguishing chamber being broken due to surface cracks, and during actual use after assembly;

[0014] 2、The present application sets up sliding sleeve, sliding rod and expansion block, when the current is disconnected for a certain value, the current is contracted to a point where the movable contact and the static contact are just separated, the resistance between the electrodes increases sharply and the temperature rises rapidly, until the evaporation of the electrode metal occurs, and when the movable contact and the static contact contact again, the sliding rod will contract into the sliding sleeve due to the contact of the movable contact and the static contact, at this time, the sliding rod will extrude the gas in the sliding sleeve into the expansion block, so that the expansion block contacts with the movable contact and the static contact during expansion, thereby reducing the impact force when the movable contact and the static contact contact, and after the movable contact and the static contact contact, the pressure at both ends of the movable contact and the static contact and the elastic force of the spring inside the sliding sleeve can ensure the stability of the two contact assemblies when they contact, thereby reducing the risk of poor contact of the vacuum arc-extinguishing chamber. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the present application;

[0016] Figure 2 It is a three-dimensional cross-sectional structural schematic diagram of the ceramic shell of the present application;

[0017] Figure 3 Fig. 1 is a schematic view of the cross-sectional structure of the present application;

[0018] Figure 4 Fig. 2 is a schematic view of the structure of the moving contact of the present application;

[0019] Figure 5 Fig. 3 is a schematic view of the structure of the adjusting rod of the present application;

[0020] In the figure: 1 ceramic shell, 2 static end conductive block, 3 static end conductive rod, 4 static contact, 5 contact assembly, 6 moving contact, 7 connecting device, 71 moving end conductive rod, 72 bellows, 8 moving end cover plate, 9 support, 10 positioning screw nut, 11 moving conductive rod, 12 retainer, 13 bearing, 14 rotating shaft, 15 adjusting rod, 16 support rod, 17 positioning plate, 18 shielding cylinder, 19 sliding rod, 20 sliding sleeve, 21 guide pipe, 22 protective shell, 23 expansion block, 24 extrusion plate, 25 retaining block, 26 reinforcing plate. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0022] As Figures 1-5As shown, the present application provides a safe and impact-resistant vacuum interrupter, comprising a ceramic shell 1, the upper surface of the ceramic shell 1 is fixedly connected with the lower surface of the static end conductive block 2, the lower surface of the static end conductive block 2 is provided with a static end conductive rod 3, the bottom end of the static end conductive rod 3 is fixedly connected with a static contact 4, a moving contact 6 is arranged in the ceramic shell 1, the moving contact 6 is located below the static contact 4, the lower surface of the moving contact 6 is fixedly connected with a connecting device 7, the outer surface of the connecting device 7 is clamped in a dynamic end cover plate 8, the dynamic end cover plate 8 is clamped on the lower surface of the ceramic shell 1, the lower surface of the dynamic end cover plate 8 is fixedly connected with a support 9, the dynamic end cover plate 8 is fixedly connected with the upper surface of a positioning screw nut 10 through the support 9, a dynamic conductive rod 11 is screwedly connected in the positioning screw nut 10, the lower surface of the dynamic end cover plate 8 is fixedly connected with a plurality of retainer rings 12, the front surface and the back surface of the inner wall of the retainer ring 12 are fixedly connected with one end of the front surface and one end of the back surface of a rotating shaft 14 respectively, the outer surface of the rotating shaft 14 is sleeved with a bearing 13, the outer surface of the bearing 13 is fixedly connected with an adjusting rod 15, the upper surface of the adjusting rod 15 is fixedly connected with a supporting rod 16, and the top ends of the plurality of supporting rods 16 are all fixedly connected with a positioning plate 17, by arranging the support 9, the positioning screw nut 10, the extrusion plate 24, the positioning plate 17 and the retainer ring 12, the vacuum interrupter can be auxiliary positioned through the positioning plate 17 on the surface thereof during installation, so that the dislocation of the vacuum interrupter due to touching or extrusion during subsequent assembly is reduced, so that the vacuum interrupter is not prone to poor contact after installation, and after assembly, since the ceramic shell 1 is provided with a plurality of supporting rods 16, the supporting rods 16 can effectively prevent external objects from contacting the ceramic shell 1, so that the impact between external hard objects and the vacuum interrupter to cause the ceramic shell 1 to be broken and leak is reduced, so that the ceramic shell 1 is not prone to cracks due to surface impact, the breaking of the vacuum interrupter due to surface cracks is reduced, and during actual use after assembly.

[0023] As Figure 1 , Figure 3 and Figure 5As shown, the right side of the positioning plate 17 is in close contact with the outer surface of the ceramic shell 1, the right end of the adjusting rod 15 is fixedly connected with the extrusion plate 24, the extrusion plate 24 is located above the positioning screw nut 10, the lower surface of the extrusion plate 24 is fixedly connected with the retaining block 25, the upper surface of the retaining block 25 is provided as an inclined surface, the left side of the retaining block 25 is fixedly connected with the right end of the adjusting rod 15, the opposite surfaces of the static contact 4 and the moving contact 6 are fixedly connected with the sliding sleeve 20, and the two sliding sleeves 20 are slidably connected with the sliding rods 19, and the opposite ends of the two sliding rods 19 are respectively fixedly connected with the surfaces of the two contact assemblies 5 away from each other. Because the sliding rods 19 and the sliding sleeves 20 are provided, when the two contact assemblies 5 contact, the two contact assemblies 5 can respectively extrude the gas in the two sliding sleeves 20 into the protective shell 22, thereby reducing the speed when the two contact assemblies 5 contact, and ensuring the service life of the contact assembly 5, the moving contact 6 and the static contact 4.

[0024] As shown in Figure 1 , Figure 4 and Figure 5 , the sliding sleeve 20 is provided with a spring, the outer surface of the sliding sleeve 20 is fixedly connected with a plurality of conduits 21, the sliding sleeve 20 is connected with a plurality of protective shells 22 through the plurality of conduits 21, the lower surface of the protective shell 22 and the outer surface of the conduit 21 are fixedly connected with the upper surface of the moving contact 6, the upper surface of the protective shell 22 is provided with a mounting hole, the mounting hole in the upper surface of the protective shell 22 is fixedly connected with the expansion block 23, the expansion block 23 is connected with the conduit 21 through the protective shell 22, by providing the sliding sleeve 20, the sliding rod 19 and the expansion block 23, the expansion block 23 contacts the moving contact 6 and the static contact 4 during the expansion process, thereby reducing the impact force when the moving contact 6 and the static contact 4 contact, and at the same time, after the moving contact 6 and the static contact 4 contact, the pressure at both ends of the moving contact 6 and the static contact 4 and the elastic force of the spring in the sliding sleeve 20 can ensure the stability of the two contact assemblies 5 when they contact, thereby reducing the poor contact condition of the vacuum arc chamber, the expansion block 23 is provided as a high-temperature-resistant expansion block, and the sliding sleeve 20 and the sliding rod 19 are made of copper-chromium alloy.

[0025] As shown in Figure 1 , Figure 2 and Figure 3 , the outer surface of the positioning plate 17 is provided as a curved surface, the outer surface of the positioning plate 17 is provided with anti-skid lines, the ceramic shell 1 is provided with a shielding cylinder 18, the left and right side surfaces of the inner wall of the plurality of retainer plates 12 are fixedly connected with the reinforcing plates 26, the connecting device 7 includes a moving end conductive rod 71, the top end of the moving end conductive rod 71 is fixedly connected with the lower surface of the moving contact 6, the bottom end of the moving end conductive rod 71 is fixedly connected with the top end of the bellows 72, and the bellows 72 is clamped in the moving end cover plate 8.

[0026] The working principle of the application is as follows: when the vacuum arc-extinguishing chamber is used, the vacuum arc-extinguishing chamber is only installed to a suitable position and moved axially along the pipeline of the installation position, and after the movement is completed, the movable conducting rod 11 is connected with the positioning screw nut 10, when the movable conducting rod 11 passes through the positioning screw nut 10 and contacts the extrusion plate 24, the extrusion plate 24 is moved upward, and the adjusting rod 15 is turned along the rotating shaft 14 with the movement of the extrusion plate 24, at this time, the supporting rods 16 are inclined with the rotation of the adjusting rod 15, and with the movement of the supporting rods 16, the positioning plate 17 is separated from the surface of the ceramic shell 1 and contacts the inner wall of the pipeline of the installation position, so that the vacuum arc-extinguishing chamber can be positioned by the positioning plate 17 on the surface thereof during installation, when a certain value of current is disconnected, the current is contracted to a point where the movable contact 6 and the static contact 4 are just separated, the resistance between the electrodes is increased sharply and the temperature is increased rapidly, until the evaporation of the electrode metal occurs, and when the movable contact 6 and the static contact 4 contact again, the sliding rod 19 is retracted into the sliding sleeve 20 due to the contact of the movable contact 6 and the static contact 4, at this time, the sliding rod 19 extrudes the gas in the sliding sleeve 20 into the expansion block 23, so that the expansion block 23 contacts the movable contact 6 and the static contact 4 during expansion.

[0027] Finally, it should be pointed out that: first, in the description of the present application, it should be pointed out that, unless otherwise specified and limited, the terms "installation", "connection", "connection" should be understood broadly, which can be mechanical connection or electrical connection, or the communication between two elements, or direct connection, "up", "down", "left", "right" and the like are only used to indicate the relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may change;

[0028] Secondly: the present application discloses the structure involved in the embodiment of the present application, other structures can refer to the usual design, and in the case of no conflict, the same embodiment and different embodiments of the present application can be combined with each other;

[0029] Finally: the above only describes the preferred embodiments of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A safe and impact-resistant vacuum interrupter comprising a ceramic housing (1), characterized in that: The upper surface of the ceramic shell (1) is fixedly connected with the lower surface of the static end conductive block (2), the lower surface of the static end conductive block (2) is provided with a static end conductive rod (3), the bottom end of the static end conductive rod (3) is fixedly connected with a static contact (4), the ceramic shell (1) is provided with a moving contact (6), the moving contact (6) is located below the static contact (4), the lower surface of the moving contact (6) is fixedly connected with a connecting device (7), the outer surface of the connecting device (7) is clamped in the moving end cover plate (8), the moving end cover plate (8) is clamped on the lower surface of the ceramic shell (1), the lower surface of the moving end cover plate (8) is fixedly connected with a support (9), the moving end cover plate (8) is fixedly connected with the upper surface of the positioning screw nut (10) through the support (9), the positioning screw nut (10) is threadedly connected with a moving conductive rod (11), the lower surface of the moving end cover plate (8) is fixedly connected with a plurality of retainer frames (12), the front surface and the back surface of the inner wall of the retainer frame (12) are fixedly connected with one end of the front surface and one end of the back surface of the rotating shaft (14) respectively, the outer surface of the rotating shaft (14) is sleeved with a bearing (13), the outer surface of the bearing (13) is fixedly connected with an adjusting rod (15), the upper surface of the adjusting rod (15) is fixedly connected with a supporting rod (16), and the top ends of the plurality of supporting rods (16) are fixedly connected with a positioning plate (17).

2. A safe and impact-resistant vacuum interrupter according to claim 1, characterized in that: The right side surface of the positioning plate (17) is fitted with the outer surface of the ceramic shell (1), the right end of the adjusting rod (15) is fixedly connected with a pressing plate (24), the pressing plate (24) is located above the positioning screw nut (10), the lower surface of the pressing plate (24) is fixedly connected with a retaining block (25), the upper surface of the retaining block (25) is provided as an inclined surface, and the left side surface of the retaining block (25) is fixedly connected with the right end of the adjusting rod (15).

3. A safe and impact-resistant vacuum interrupter according to claim 1, characterized in that: The opposite surfaces of the static contact (4) and the moving contact (6) are fixedly connected with a sliding sleeve (20), and a sliding rod (19) is slidably connected in the two sliding sleeves (20), and one end of the opposite surfaces of the two sliding rods (19) is fixedly connected with the surfaces away from the two contact assemblies (5) respectively.

4. A safe and impact-resistant vacuum interrupter according to claim 3, characterized in that: A spring is arranged in the sliding sleeve (20), a plurality of guide pipes (21) are fixedly connected to the outer surface of the sliding sleeve (20), the sliding sleeve (20) is connected with a plurality of protective shells (22) through the plurality of guide pipes (21), and the lower surface of the protective shell (22) and the outer surface of the guide pipe (21) are fixedly connected with the upper surface of the moving contact (6).

5. A safe and impact-resistant vacuum interrupter according to claim 4, characterized in that: An installation hole is formed in the upper surface of the protective shell (22), an expansion block (23) is fixedly connected in the installation hole formed in the upper surface of the protective shell (22), the expansion block (23) is connected with the guide pipe (21) through the protective shell (22), the expansion block (23) is provided as a high-temperature-resistant expansion block, and the sliding sleeve (20) and the sliding rod (19) are made of copper-chromium alloy.

6. A safe and impact-resistant vacuum interrupter according to claim 1, characterized in that: The outer surface of the positioning plate (17) is provided as a cambered surface, the outer surface of the positioning plate (17) is provided with anti-skid lines, a shielding cylinder (18) is arranged in the ceramic shell (1), and the left and right sides of the inner wall of each retainer (12) are fixedly connected with a reinforcing plate (26).

7. A safe and impact-resistant vacuum interrupter according to claim 1, characterized in that: The connecting device (7) comprises a movable end conductive rod (71), the top end of the movable end conductive rod (71) is fixedly connected with the lower surface of the movable contact (6), the bottom end of the movable end conductive rod (71) is fixedly connected with the top end of a bellows (72), and the bellows (72) is clamped in the movable end cover plate (8).

Images