A vacuum interrupter and assembly method thereof

Abstract

This invention relates to the technical field of vacuum interrupters, specifically to a vacuum interrupter and its assembly method. A vacuum interrupter includes a ceramic cylinder, a stationary conductive rod, a moving conductive rod, and a corrugated sleeve. The corrugated sleeve includes an inner corrugated tube, a middle corrugated tube, an outer corrugated tube, and an adjusting assembly. The inwardly protruding part of the inner corrugated tube is a first inner convex ring, and the outwardly protruding part is a first outer convex ring. The inwardly protruding part of the outer corrugated tube is a second inner convex ring, and the outwardly protruding part is a second outer convex ring. The adjusting assembly includes a first rubber ring and a second rubber ring. When the first outer convex ring passes over the inwardly protruding part, it can retract inward to facilitate passing over the inwardly protruding part. When the second inner convex ring passes over the outwardly protruding part, it can expand outward to facilitate passing over the outwardly protruding part. This invention provides a vacuum interrupter and its assembly method to solve the problems of difficult installation and easy axial bending of the corrugated tubes in existing vacuum interrupters.

Description

Technical Field

[0001] The invention relates to the technical field of circuit breakers, and in particular to a vacuum interrupter and an assembly method thereof. Background Art

[0002] The vacuum interrupter is a key component used in high-voltage electrical appliances such as high-voltage circuit breakers and vacuum circuit breakers. Its main function is to extinguish the arc and ensure electrical insulation when the circuit is disconnected. The vacuum interrupter produced by existing technology depends on the bellows for its ability to withstand gas pressure. The bellows is a thin-walled component made of 0.1mm to 0.3mm thick stainless steel tube, which ensures that the moving electrode can move freely within a certain range and maintain a high vacuum state for a long time. However, with the development of high-voltage vacuum interrupters, the bellows needs to meet the requirements of long stroke, which means that the length of the bellows needs to be increased accordingly.

[0003] One of the existing solutions is to design a multi-layer bellows. One design method is to install multiple bellows in parallel from the inside to the outside, without interfering with each other, and the bellows are filled with gases of different pressures in a step-by-step manner. However, this method will greatly increase the space occupied by the bellows, which will in turn increase the volume of the vacuum arc extinguishing chamber, which is not in line with the current miniaturization design concept; another design method is to connect multiple bellows in sequence. Although the space occupied is reduced compared to the first method, due to factors such as the wall thickness of the bellows themselves, adjacent bellows are prone to interference or even damage during the compression process of the bellows.

[0004] For example, the Chinese invention patent application with the announcement number CN119028758A provides a high-pressure-resistant vacuum arc chamber bellows composed of an inner bellows, a middle bellows and an outer bellows that are sleeved in sequence, and a buffer body is set in the adjacent crests or troughs to further protect the crests and troughs. However, due to the S-shaped waveform design of the bellows and the setting of the buffer body, the inner bellows, the middle bellows and the outer bellows are not easy to install during installation. For example, when the outer bellows is sleeved outside the middle bellows, the trough of the outer bellows must pass through the crests of multiple buffer bodies in sequence. At this time, the trough of the outer bellows is stretched, which is easy to damage the outer bellows. In addition, the bellows with a long stroke are prone to axial bending, and multiple bellows that are sleeved in sequence still cannot completely ensure that the bellows remain in a vertical state. Summary of the invention

[0005] The invention provides a vacuum interrupter and an assembly method thereof, so as to solve the problem that the bellows of the existing vacuum interrupter is difficult to install and is prone to axial bending.

[0006] A vacuum interrupter and an assembly method thereof of the present invention adopt the following technical scheme: a vacuum interrupter comprises a porcelain cylinder, a static conductive rod, a dynamic conductive rod and a corrugated sleeve, wherein the porcelain cylinder is vertically arranged. The static conductive rod and the dynamic conductive rod are both arranged in the porcelain cylinder and are coaxially arranged with the porcelain cylinder. The static conductive rod is fixedly arranged at the lower end of the porcelain cylinder, and the dynamic conductive rod is slidably arranged at the upper end of the porcelain cylinder.

[0007] The corrugated sleeve is arranged in the porcelain cylinder, the corrugated sleeve and the porcelain cylinder are arranged coaxially, and are located on the outside of the dynamic conductive rod. The upper end of the corrugated sleeve is fixedly connected to the porcelain cylinder, and the lower end of the corrugated sleeve is arranged on the dynamic conductive rod. The corrugated sleeve includes an inner bellows, a middle bellows, an outer bellows and an adjustment component. The inner bellows, the middle bellows and the outer bellows are distributed in sequence from the inside to the outside. The cross-sections of the inner bellows, the middle bellows and the outer bellows perpendicular to the horizontal plane are wavy along the vertical direction. The inner bellows protrudes inwardly to the first inner convex ring, and the inner bellows protrudes outwardly to the first outer convex ring. The cross-section of the first outer convex ring perpendicular to the axis of the porcelain cylinder is wavy along the circumference of the porcelain cylinder, and the cross-section of the first inner convex ring perpendicular to the axis of the porcelain cylinder is circular. The inward protrusion of the outer bellows is the second inner convex ring, and the outward protrusion of the outer bellows is the second outer convex ring. The cross section of the second outer convex ring perpendicular to the axis of the porcelain cylinder is circular, and the cross section of the second inner convex ring perpendicular to the axis of the porcelain cylinder is wavy along the circumference of the porcelain cylinder. The second inner convex ring corresponds to the first inner convex ring one by one, and the second outer convex ring corresponds to the first outer convex ring one by one.

[0008] The adjustment assembly includes a first rubber ring and a second rubber ring, wherein the first rubber ring is arranged between the inner bellows and the middle bellows, and the second rubber ring is arranged between the middle bellows and the outer bellows. The cross sections of the first rubber ring and the second rubber ring perpendicular to the horizontal plane are both wavy in the vertical direction.

[0009] Furthermore, the inwardly protruding convex surface of the first rubber ring abuts against the first inner convex ring, and the outwardly protruding convex surface of the second rubber ring abuts against the second outer convex ring.

[0010] Furthermore, a first ring groove is formed on the first rubber ring, and the first ring groove and the first rubber ring are coaxially arranged. A second ring groove is formed on the second rubber ring, and the second ring groove and the second rubber ring are coaxially arranged. The adjustment assembly also includes a first support ring and a second support ring, the first support ring is rotatably arranged in the first ring groove, and the second support ring is rotatably arranged in the second ring groove.

[0011] Furthermore, each first rubber ring is provided with a plurality of first arc grooves, and the plurality of first arc grooves are sequentially distributed along the circumference of the first rubber ring. The first arc groove and the first rubber ring are coaxially arranged, the first arc groove is arranged on the inner side of the first annular groove, and the first arc groove and the first annular groove are connected. A first connecting tube is fixedly arranged at one end of the first arc groove, and the first connecting tube is arranged along the radial direction of the first rubber ring.

[0012] A first fixed block is fixedly arranged on the first support ring, and the first fixed block is slidably arranged in the first arc groove. The space in the first arc groove between the first fixed block and the first connecting tube is a first space, and hydraulic oil is arranged in the first space. A first connecting rod is fixedly arranged on each inwardly protruding convex surface of the wavy cross-section of the first outer convex ring perpendicular to the axis of the porcelain cylinder, and the first connecting rod is arranged along the radial direction of the first rubber ring, and one end of the first connecting rod is slidably arranged in the first connecting tube.

[0013] Furthermore, each second rubber ring is provided with a plurality of second arc grooves, and the plurality of second arc grooves are sequentially distributed along the circumference of the second rubber ring. The second arc groove and the second rubber ring are coaxially arranged, the second arc groove is arranged outside the second annular groove, and the second arc groove and the second annular groove are connected. A second connecting tube is fixedly arranged at one end of the second arc groove, and the second connecting tube is arranged along the radial direction of the second rubber ring.

[0014] A second fixing block is fixedly arranged on the second support ring, and the second fixing block is slidably arranged in the second arc groove. The space in the second arc groove between the second fixing block and the second connecting tube is a second space, and hydraulic oil is arranged in the second space. A second connecting rod is fixedly arranged on each outwardly protruding convex surface of the wavy cross section of the second inner convex ring perpendicular to the axis of the porcelain cylinder, and the second connecting rod is arranged along the radial direction of the second rubber ring, and one end of the second connecting rod is slidably arranged in the second connecting tube.

[0015] Furthermore, the bellows sleeve also includes an upper fixing ring and a lower fixing ring, and the upper fixing ring and the lower fixing ring are both coaxially arranged with the porcelain tube. The upper fixing ring is fixedly connected to the upper end of the middle bellows, and the upper fixing ring is fixedly connected to the porcelain tube. The lower fixing ring is fixedly connected to the lower end of the middle bellows, and a protective cover is fixedly arranged on the moving conductive rod, and the lower fixing ring is fixedly arranged on the protective cover.

[0016] Furthermore, a static contact is fixedly provided at the upper end of the static conductive rod, and a dynamic contact is fixedly provided at the lower end of the dynamic conductive rod, and the dynamic contact is used to contact the static contact.

[0017] Furthermore, a shielding cylinder is fixedly arranged inside the porcelain cylinder. The shielding cylinder and the porcelain cylinder are coaxially arranged. The shielding cylinder is located in the middle of the porcelain cylinder, and the moving contact and the static contact are both located in the shielding cylinder when in contact.

[0018] Furthermore, the porcelain cylinder includes a cylinder body, a moving cover plate and a static cover plate. The cylinder body is vertically arranged, the moving cover plate is fixedly arranged at the upper end of the cylinder body, and the upper fixing ring is fixedly connected to the moving cover plate. A guide sleeve is fixedly arranged on the moving cover plate, the guide sleeve and the porcelain cylinder are coaxially arranged, a first through hole is opened on the guide sleeve, a second through hole is opened on the moving cover plate, the moving conductive rod passes through the first through hole and the second through hole in sequence, and is slidably arranged in the first through hole and the second through hole. The static cover plate is fixedly arranged at the lower end of the cylinder body.

[0019] A method for assembling a vacuum interrupter chamber, used for a vacuum interrupter chamber, comprises the following steps:

[0020] S1, install the static conductive rod into the lower end of the porcelain tube.

[0021] S2, sleeve the middle bellows on the outside of the moving conductive rod.

[0022] S3, first install the first rubber ring on the inner side of the middle bellows, and then install the inner bellows on the inner side of the first rubber ring.

[0023] S4, then install the second rubber ring on the outside of the middle bellows, and then install the outer bellows on the outside of the second rubber ring.

[0024] S5, finally install the moving conductive rod into the upper end of the porcelain tube.

[0025] The beneficial effects of the present invention are as follows: a vacuum arc extinguishing chamber of the present invention is provided with a bellows sleeve. When installing, the middle bellows sleeve is firstly provided on the outer side of the moving conductive rod, and then the first rubber ring is installed on the inner side of the middle bellows, and then the inner bellows is installed on the inner side of the first rubber ring. When installing the inner bellows, the first outer convex ring on the inner bellows needs to pass through multiple outward protrusions and inward protrusions of the first rubber ring from top to bottom. Since the cross section of the first outer convex ring perpendicular to the axis of the porcelain tube is wavy, when the first outer convex ring passes over the inward protrusion, the first outer convex ring can shrink inward to facilitate passing over the inward protrusion. When it reaches the outward protrusion, the first outer convex ring can be reset and expanded to correspond to the outward protrusion, thereby facilitating the installation of the inner bellows.

[0026] Install the second rubber ring on the outside of the middle bellows, and then install the outer bellows on the outside of the second rubber ring. When installing the outer bellows, the second inner convex ring on the outer bellows needs to pass through multiple outward protrusions and inward protrusions of the second rubber ring from top to bottom. Since the cross-section of the second inner convex ring perpendicular to the axis of the porcelain tube is wavy, when the second inner convex ring passes over the outward protrusion, the second inner convex ring can expand outward to facilitate passing over the outward protrusion. When it reaches the recessed part, the second inner convex ring resets and shrinks to correspond to the inward protrusion. This facilitates the installation of the outer bellows and prevents the second inner convex ring from being damaged due to excessive expansion. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0028] Figure 1A schematic diagram of the structure of a vacuum interrupter provided by an embodiment of the present invention;

[0029] Figure 2 A schematic diagram of the structure of a corrugated sleeve of a vacuum interrupter provided in an embodiment of the present invention;

[0030] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0031] Figure 4 A cross-sectional view of a corrugated sleeve of a vacuum interrupter provided in an embodiment of the present invention;

[0032] Figure 5 for Figure 4 The enlarged view of point B in the middle;

[0033] Figure 6 A cross-sectional view of another position of a corrugated sleeve of a vacuum interrupter provided by an embodiment of the present invention;

[0034] Figure 7 for Figure 6 Enlarged view of point C in the middle.

[0035] In the figure: 100, static conductive rod; 200, dynamic conductive rod; 300, porcelain cylinder; 310, static cover plate; 320, dynamic cover plate; 400, static contact; 500, dynamic contact; 600, shielding cylinder; 700, corrugated sleeve; 710, middle corrugated pipe; 711, upper fixing ring; 712, lower fixing ring; 720, inner corrugated pipe; 721, first inner convex ring; 722, first outer convex ring; 730, outer corrugated pipe; 731, second Inner convex ring; 732, second outer convex ring; 740, first rubber ring; 741, first connecting rod; 742, first connecting tube; 743, first arc groove; 750, second rubber ring; 751, second connecting rod; 752, second connecting tube; 753, second arc groove; 780, first supporting ring; 781, first fixing block; 790, second supporting ring; 791, second fixing block; 800, guide sleeve; 900, protective cover. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Reference Figures 1 to 7As shown, a vacuum arc extinguishing chamber provided by an embodiment of the present invention includes a porcelain cylinder 300, a static conductive rod 100, a dynamic conductive rod 200 and a corrugated sleeve 700, wherein the porcelain cylinder 300 is vertically arranged. The static conductive rod 100 and the dynamic conductive rod 200 are both arranged in the porcelain cylinder 300, and are both arranged coaxially with the porcelain cylinder 300. The static conductive rod 100 is fixedly arranged at the lower end of the porcelain cylinder 300, and the dynamic conductive rod 200 is slidably arranged at the upper end of the porcelain cylinder 300.

[0038] The corrugated sleeve 700 is arranged in the porcelain cylinder 300, the corrugated sleeve 700 and the porcelain cylinder 300 are arranged coaxially and are located outside the movable conductive rod 200. The upper end of the corrugated sleeve 700 is fixedly connected to the porcelain cylinder 300, and the lower end of the corrugated sleeve 700 is arranged on the movable conductive rod 200.

[0039] The bellows sleeve 700 includes an inner bellows 720, a middle bellows 710, an outer bellows 730 and an adjustment assembly. The inner bellows 720, the middle bellows 710 and the outer bellows 730 are arranged in sequence from the inside to the outside. The cross-sections of the inner bellows 720, the middle bellows 710 and the outer bellows 730 perpendicular to the horizontal plane are in a wave shape arranged along the vertical direction. The inner bellows 720 protrudes inwardly to form a first inner convex ring 721, and the inner bellows 720 protrudes outwardly to form a first outer convex ring 722. The cross-section of the first outer convex ring 722 perpendicular to the axis of the porcelain cylinder 300 is in a wave shape arranged along the circumference of the porcelain cylinder 300, and the cross-section of the first inner convex ring 721 perpendicular to the axis of the porcelain cylinder 300 is circular. The outer bellows 730 protrudes inwardly to form a second inner convex ring 731, and the outer bellows 730 protrudes outwardly to form a second outer convex ring 732. The cross section of the second outer convex ring 732 perpendicular to the axis of the porcelain cylinder 300 is circular, and the cross section of the second inner convex ring 731 perpendicular to the axis of the porcelain cylinder 300 is wavy along the circumference of the porcelain cylinder 300. The second inner convex ring 731 corresponds to the first inner convex ring 721 one by one, and the second outer convex ring 732 corresponds to the first outer convex ring 722 one by one. The direction toward the axis of the porcelain cylinder 300 is inward, and the direction toward the outside of the porcelain cylinder 300 is outward.

[0040] The adjustment assembly includes a first rubber ring 740 and a second rubber ring 750. The first rubber ring 740 is arranged between the inner bellows 720 and the middle bellows 710, and the second rubber ring 750 is arranged between the middle bellows 710 and the outer bellows 730. The first rubber ring 740 and the second rubber ring 750 are both arranged coaxially with the porcelain tube 300, and the cross-sections of the first rubber ring 740 and the second rubber ring 750 perpendicular to the horizontal plane are both wavy in shape arranged along the vertical direction.

[0041] First, the middle bellows 710 is sleeved on the outer side of the moving conductive rod 200, then the first rubber ring 740 is installed on the inner side of the middle bellows 710, and then the inner bellows 720 is installed on the inner side of the first rubber ring 740. When installing the inner bellows 720, the first outer convex ring 722 on the inner bellows 720 needs to pass through multiple outward protrusions and inward protrusions of the first rubber ring 740 from top to bottom. Since the cross section of the first outer convex ring 722 perpendicular to the axis of the porcelain cylinder 300 is wavy, when the first outer convex ring 722 passes over the inward protrusion, the first outer convex ring 722 can shrink inward to facilitate passing over the inward protrusion. When it comes to the outward protrusion, the first outer convex ring 722 can be reset and expanded to correspond to the outward protrusion, thereby facilitating the installation of the inner bellows 720.

[0042] The second rubber ring 750 is installed on the outside of the middle bellows 710, and then the outer bellows 730 is installed on the outside of the second rubber ring 750. When installing the outer bellows 730, the second inner convex ring 731 on the outer bellows 730 needs to pass through multiple outward protrusions and inward protrusions of the second rubber ring 750 from top to bottom. Since the cross section of the second inner convex ring 731 perpendicular to the axis of the porcelain tube 300 is wavy, when the second inner convex ring 731 passes over the outward protrusion, the second inner convex ring 731 can expand outward to facilitate passing over the outward protrusion. When it comes to the concave part, the second inner convex ring 731 resets and shrinks to correspond to the inward protrusion. While facilitating the installation of the outer bellows 730, it also prevents the second inner convex ring 731 from being damaged after being over-expanded.

[0043] In this embodiment, the inwardly protruding convex surface of the first rubber ring 740 abuts against the first inner convex ring 721 , and the outwardly protruding convex surface of the second rubber ring 750 abuts against the second outer convex ring 732 .

[0044] The first rubber ring 740 is used to prevent the inner bellows 720 and the inner wall of the middle bellows 710 from contacting and causing friction, thereby damaging the inner bellows 720 and the middle bellows 710. The second rubber ring 750 is used to prevent the outer bellows 730 and the outer wall of the middle bellows 710 from contacting and causing friction, thereby damaging the outer bellows 730 and the middle bellows 710. At the same time, after the bellows sleeve 700 is installed, the inward protrusion of the first rubber ring 740 abuts against the first inner protrusion 721, and the outward protrusion of the second rubber ring 750 abuts against the second outer protrusion 732. The first rubber ring 740 supports the inner bellows 720, and the second rubber ring 750 supports the outer bellows 730.

[0045] In this embodiment, a first annular groove is provided on the first rubber ring 740, and the first annular groove and the first rubber ring 740 are coaxially arranged. A second annular groove is provided on the second rubber ring 750, and the second annular groove and the second rubber ring 750 are coaxially arranged. The adjustment assembly also includes a first support ring 780 and a second support ring 790, the first support ring 780 is rotatably arranged in the first annular groove, and the second support ring 790 is rotatably arranged in the second annular groove. The first support ring 780 supports the first rubber ring 740, and further supports the middle bellows 710 and the inner bellows 720. The second support ring 790 supports the second rubber ring 750, and further supports the middle bellows 710 and the outer bellows 730.

[0046] In this embodiment, a plurality of first arc grooves 743 are provided in each first rubber ring 740, and the plurality of first arc grooves 743 are sequentially distributed along the circumference of the first rubber ring 740. The first arc groove 743 and the first rubber ring 740 are coaxially arranged, the first arc groove 743 is arranged on the inner side of the first annular groove, and the first arc groove 743 and the first annular groove are connected. A first connecting tube 742 is fixedly arranged at one end of the first arc groove 743, and the first connecting tube 742 is arranged along the radial direction of the first rubber ring 740.

[0047] like Figure 7 As shown, along the clockwise direction, the first arc groove 743 has one end of the first connecting pipe 742 at the rear side of the other end of the first arc groove 743 .

[0048] A first fixing block 781 is fixedly provided on the first support ring 780, and the first fixing block 781 is slidably provided in the first arc groove 743. The space in the first arc groove 743 between the first fixing block 781 and the first connecting tube 742 is the first space, and hydraulic oil is provided in the first space. A first connecting rod 741 is fixedly provided on each inwardly protruding convex surface of the wavy cross-section of the first outer convex ring 722 perpendicular to the axis of the porcelain cylinder 300, and the first connecting rod 741 is located on the side of the first outer convex ring 722 away from the center of the porcelain cylinder 300; the first connecting rod 741 is arranged along the radial direction of the first rubber ring 740, and one end of the first connecting rod 741 is slidably provided in the first connecting tube 742.

[0049] In this embodiment, a plurality of second arc grooves 753 are provided in each second rubber ring 750, and the plurality of second arc grooves 753 are sequentially distributed along the circumference of the second rubber ring 750. The second arc groove 753 and the second rubber ring 750 are coaxially arranged, the second arc groove 753 is arranged outside the second annular groove, and the second arc groove 753 and the second annular groove are connected. A second connecting tube 752 is fixedly arranged at one end of the second arc groove 753, and the second connecting tube 752 is arranged along the radial direction of the second rubber ring 750.

[0050] like Figure 5As shown, along the clockwise direction, the second arc groove 753 has one end of the second connecting pipe 752 located in front of the other end of the second arc groove 753 .

[0051] A second fixing block 791 is fixedly provided on the second support ring 790, and the second fixing block 791 is slidably provided in the second arc groove 753. The space in the second arc groove 753 between the second fixing block 791 and the second connecting tube 752 is the second space, and hydraulic oil is provided in the second space. A second connecting rod 751 is fixedly provided on each outwardly protruding convex surface of the wavy cross section of the second inner convex ring 731 perpendicular to the axis of the porcelain cylinder 300, and the second connecting rod 751 is located on the side of the second inner convex ring 731 close to the center of the porcelain cylinder 300; the second connecting rod 751 is arranged along the radial direction of the second rubber ring 750, and one end of the second connecting rod 751 is slidably provided in the second connecting tube 752.

[0052] In this embodiment, the corrugated sleeve 700 further includes an upper fixing ring 711 and a lower fixing ring 712, and the upper fixing ring 711 and the lower fixing ring 712 are both coaxially arranged with the porcelain cylinder 300. The upper fixing ring 711 is fixedly connected to the upper end of the middle bellows 710, and the upper fixing ring 711 is fixedly connected to the porcelain cylinder 300. The lower fixing ring 712 is fixedly connected to the lower end of the middle bellows 710, and a protective cover 900 is fixedly arranged on the moving conductive rod 200, and the lower fixing ring 712 is fixedly arranged on the protective cover 900.

[0053] In this embodiment, a static contact 400 is fixedly provided at the upper end of the static conductive rod 100 , and a dynamic contact 500 is fixedly provided at the lower end of the dynamic conductive rod 200 . The dynamic contact 500 is used to contact the static contact 400 .

[0054] In this embodiment, a shielding cylinder 600 is fixedly installed inside the porcelain cylinder 300. The shielding cylinder 600 and the porcelain cylinder 300 are coaxially arranged. The shielding cylinder 600 is located in the middle of the porcelain cylinder 300, and the moving contact 500 and the static contact 400 are both located in the shielding cylinder 600 when in contact.

[0055] In this embodiment, the porcelain cylinder 300 includes a cylinder body, a movable cover plate 320 and a static cover plate 310. The cylinder body is vertically arranged, the movable cover plate 320 is fixedly arranged at the upper end of the cylinder body, and the upper fixing ring 711 is fixedly connected to the movable cover plate 320. A guide sleeve 800 is fixedly arranged on the movable cover plate 320, the guide sleeve 800 and the porcelain cylinder 300 are coaxially arranged, a first through hole is opened on the guide sleeve 800, a second through hole is opened on the movable cover plate 320, the movable conductive rod 200 passes through the first through hole and the second through hole in turn, and is slidably arranged in the first through hole and the second through hole. The static cover plate 310 is fixedly arranged at the lower end of the cylinder body.

[0056] Working process: A vacuum interrupter includes an assembly phase and a working phase.

[0057] The assembly phase includes the following steps:

[0058] S1, first check each part, then start assembly. Fix the shielding cylinder 600 in the porcelain cylinder 300, and then fix the static cover 310 at the lower end of the cylinder. Fix the static contact 400 on the static conductive rod 100, and then install the static conductive rod 100 into the porcelain cylinder 300. At this time, the static contact 400 is at the upper end of the static conductive rod 100.

[0059] S2, install the moving conductive rod 200, first fix the moving contact 500 on the moving conductive rod 200, and then fix the protective cover 900 on the moving conductive rod 200. The middle bellows 710 is sleeved on the outer side of the moving conductive rod 200, and the lower fixing ring 712 on the middle bellows 710 is fixedly connected to the protective cover 900.

[0060] S3, then install the first rubber ring 740 on the inner side of the middle bellows 710, and then install the inner bellows 720 on the inner side of the first rubber ring 740. When installing the inner bellows 720, the first outer convex ring 722 on the inner bellows 720 needs to pass through multiple outward protrusions and inward protrusions of the first rubber ring 740 from top to bottom. Since the cross section of the first outer convex ring 722 perpendicular to the axis of the porcelain tube 300 is wavy, when the first outer convex ring 722 passes over the inward protrusion, the first outer convex ring 722 can shrink inward to facilitate passing over the inward protrusion. When it reaches the outward protrusion, the first outer convex ring 722 can be reset and expanded to correspond to the outward protrusion, thereby facilitating the installation of the inner bellows 720.

[0061] S4, first install the second rubber ring 750 on the outside of the middle bellows 710, and then install the outer bellows 730 on the outside of the second rubber ring 750.

[0062] When installing the outer bellows 730, the second inner convex ring 731 on the outer bellows 730 needs to pass through the outward protrusions and inward protrusions of the multiple second rubber rings 750 from top to bottom. Since the cross section of the second inner convex ring 731 perpendicular to the axis of the porcelain tube 300 is wavy, when the second inner convex ring 731 passes over the outward protrusion, the second inner convex ring 731 can expand outward to facilitate passing over the outward protrusion. When reaching the concave part, the second inner convex ring 731 is reset and contracted to correspond to the inward protrusion. While facilitating the installation of the outer bellows 730, it also prevents the second inner convex ring 731 from being damaged after being over-expanded.

[0063] The first rubber ring 740 is used to prevent the inner bellows 720 and the inner wall of the middle bellows 710 from contacting and causing friction, thereby damaging the inner bellows 720 and the middle bellows 710. The second rubber ring 750 is used to prevent the outer bellows 730 and the outer wall of the middle bellows 710 from contacting and causing friction, thereby damaging the outer bellows 730 and the middle bellows 710. At the same time, after the bellows sleeve 700 is installed, the inward protrusion of the first rubber ring 740 abuts against the first inner protrusion 721, and the outward protrusion of the second rubber ring 750 abuts against the second outer protrusion 732. The first rubber ring 740 supports the inner bellows 720, and the second rubber ring 750 supports the outer bellows 730.

[0064] S5, sleeve the movable cover plate 320 on the movable conductive rod 200, then fix the upper fixing ring 711 on the bellows and the movable cover plate 320, and fix the movable cover plate 320 and the cylinder body, and finally sleeve the guide sleeve 800 on the movable conductive rod 200 and fix it to the movable cover plate 320, thereby completing the assembly.

[0065] During the working stage, when the moving conductive rod 200 moves downward, the bellows gradually stretches. When the moving conductive rod 200 needs to travel a long path, the bellows is prone to axial bending during the gradual stretching process. At this time, the distance between two adjacent outward protrusions on one side of the bellows is shorter, while the distance between two adjacent outward protrusions on the other side of the bellows is longer, which can easily cause excessive squeezing and stretching of the bellows, thereby damaging the bellows.

[0066] In the present invention, the clockwise direction and the counterclockwise direction are Figure 5 and Figure 7 The viewing angle definition in the figure is that both the clockwise direction and the counterclockwise direction are viewing angles of the porcelain cylinder 300 from top to bottom.

[0067] When the first outer convex ring 722 on one side of the inner bellows 720 tends to be squeezed, the first outer convex ring 722 drives the first connecting rod 741 to move away from the axis of the porcelain tube 300, thereby causing the first connecting rod 741 to move toward the inside of the first connecting tube 742.

[0068] The first connecting rod 741 squeezes the hydraulic oil in the first space, and the hydraulic oil pushes the first supporting ring 780 to rotate counterclockwise (such as Figure 7 As shown). The volume of the first space increases. When the first support ring 780 rotates counterclockwise, it drives all the first fixing blocks 781 to rotate counterclockwise synchronously, and the volumes of all the first spaces increase.

[0069] When the other side of the inner bellows 720 tends to expand, the first connecting rod 741 on the first outer convex ring 722 tends to move toward the axis of the porcelain tube 300, thereby causing the first connecting rod 741 to move toward the outside of the first connecting tube 742, and the hydraulic oil pushes the first support ring 780 to rotate clockwise through the first fixed block 781, and the volume of the first space decreases. When the first support ring 780 rotates clockwise, it drives all the first fixed blocks 781 to rotate clockwise synchronously, and the volumes of all the first spaces decrease. The multiple first connecting rods 741 on both sides of the inner bellows 720 interact with each other, so that the clockwise rotation trend of the first support ring 780 and the counterclockwise rotation trend of the first support ring 780 offset each other, thereby allowing the inner bellows 720 to always remain in a vertical state.

[0070] When the second inner convex ring 731 on one side of the outer bellows 730 tends to be squeezed, the second inner convex ring 731 drives the second connecting rod 751 to move away from the axis of the porcelain tube 300, thereby causing the second connecting rod 751 to move away from the second connecting tube 752.

[0071] like Figure 5 As shown, under the action of negative pressure, the second fixing block 791 is driven to rotate clockwise, the volume of the second space is reduced, and when the second fixing block 791 rotates clockwise, the second support ring 790 rotates clockwise synchronously. When the second support ring 790 rotates clockwise, all the second fixing blocks 791 are driven to rotate clockwise, and the volumes of all the second spaces are reduced.

[0072] When the second inner convex ring 731 on one side of the outer bellows 730 tends to expand, the second inner convex ring 731 drives the second connecting rod 751 to move in the direction close to the axis of the porcelain tube 300, and the second connecting rod 751 moves in the direction close to the second connecting tube 752. The second connecting rod 751 squeezes the hydraulic oil in the second space, and the hydraulic oil pushes the second support ring 790 to rotate counterclockwise through the second fixed block 791, and the volume of the second space increases. When the second support ring 790 rotates counterclockwise, it drives all the second fixed blocks 791 to rotate counterclockwise synchronously, and the volume of all the second spaces increases. The multiple second connecting rods 751 on both sides of the outer bellows 730 interact with each other, so that the clockwise rotation trend of the second support ring 790 and the counterclockwise rotation trend of the second support ring 790 offset each other, thereby allowing the outer bellows 730 to always remain in a vertical state.

[0073] After the movable conductive rod 200 moves downward until the movable contact 500 on the movable conductive rod 200 contacts the static contact 400 on the static conductive rod 100 , the movable conductive rod 200 is connected to the static conductive rod 100 .

[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A vacuum interrupter, characterized in that: It includes a porcelain cylinder, a static conductive rod, a dynamic conductive rod and a corrugated sleeve. The porcelain cylinder is arranged vertically. The static conductive rod and the dynamic conductive rod are both arranged in the porcelain cylinder and are coaxially arranged with the porcelain cylinder. The static conductive rod is fixedly arranged at the lower end of the porcelain cylinder, and the dynamic conductive rod is slidably arranged at the upper end of the porcelain cylinder. The bellows sleeve is arranged in the porcelain cylinder, the bellows sleeve and the porcelain cylinder are arranged coaxially and are located on the outside of the dynamic conductive rod; the upper end of the bellows sleeve is fixedly connected to the porcelain cylinder, and the lower end of the bellows sleeve is arranged on the dynamic conductive rod; the bellows sleeve includes an inner bellows, a middle bellows, an outer bellows and an adjustment component; the inner bellows, the middle bellows and the outer bellows are arranged in sequence from the inside to the outside; the cross-sections of the inner bellows, the middle bellows and the outer bellows perpendicular to the horizontal plane are wavy in the vertical direction; the inner bellows protrudes inwardly as a first inner convex circle, and the inner bellows protrudes outwardly The first outer convex ring is the source; the cross section of the first outer convex ring perpendicular to the axis of the porcelain tube is in a wave shape arranged along the circumference of the porcelain tube, and the cross section of the first inner convex ring perpendicular to the axis of the porcelain tube is circular; the inward protrusion of the outer bellows is the second inner convex ring, and the outward protrusion of the outer bellows is the second outer convex ring; the cross section of the second outer convex ring perpendicular to the axis of the porcelain tube is circular, and the cross section of the second inner convex ring perpendicular to the axis of the porcelain tube is in a wave shape arranged along the circumference of the porcelain tube; the second inner convex ring corresponds to the first inner convex ring one-to-one, and the second outer convex ring corresponds to the first outer convex ring one-to-one; The adjustment component includes a first rubber ring and a second rubber ring. The first rubber ring is arranged between the inner bellows and the middle bellows, and the second rubber ring is arranged between the middle bellows and the outer bellows. The cross-sections of the first rubber ring and the second rubber ring perpendicular to the horizontal plane are both wavy and arranged along the vertical direction.

2. A vacuum interrupter according to claim 1, characterized in that: The inwardly protruding convex surface of the first rubber ring abuts against the first inner convex ring; the outwardly protruding convex surface of the second rubber ring abuts against the second outer convex ring.

3. A vacuum interrupter according to claim 1, characterized in that: The first rubber ring is provided with a first ring groove, and the first ring groove and the first rubber ring are coaxially arranged; the second rubber ring is provided with a second ring groove, and the second ring groove and the second rubber ring are coaxially arranged; the adjustment assembly also includes a first support ring and a second support ring, the first support ring is rotatably arranged in the first ring groove, and the second support ring is rotatably arranged in the second ring groove.

4. A vacuum interrupter according to claim 3, characterized in that: A plurality of first arc grooves are provided in each first rubber ring, and the plurality of first arc grooves are sequentially distributed along the circumference of the first rubber ring; the first arc groove and the first rubber ring are coaxially arranged, the first arc groove is arranged on the inner side of the first annular groove, and the first arc groove and the first annular groove are connected; a first connecting tube is fixedly arranged at one end of the first arc groove, and the first connecting tube is arranged along the radial direction of the first rubber ring; A first fixed block is fixedly arranged on the first support ring, and the first fixed block is slidably arranged in the first arc groove; the space in the first arc groove between the first fixed block and the first connecting tube is the first space, and hydraulic oil is arranged in the first space; a first connecting rod is fixedly arranged on each inwardly protruding convex surface of the wavy cross-section of the first outer convex ring perpendicular to the axis of the porcelain tube, and the first connecting rod is arranged along the radial direction of the first rubber ring, and one end of the first connecting rod is slidably arranged in the first connecting tube.

5. A vacuum interrupter according to claim 3, characterized in that: A plurality of second arc grooves are provided in each second rubber ring, and the plurality of second arc grooves are sequentially distributed along the circumference of the second rubber ring; the second arc groove and the second rubber ring are coaxially arranged, the second arc groove is arranged outside the second annular groove, and the second arc groove and the second annular groove are connected; a second connecting pipe is fixedly arranged at one end of the second arc groove, and the second connecting pipe is arranged along the radial direction of the second rubber ring; A second fixed block is fixedly arranged on the second support ring, and the second fixed block is slidably arranged in the second arc groove; the space in the second arc groove between the second fixed block and the second connecting tube is the second space, and hydraulic oil is arranged in the second space; a second connecting rod is fixedly arranged on each outwardly protruding convex surface of the wavy cross-section of the second inner convex ring perpendicular to the axis of the porcelain cylinder, and the second connecting rod is arranged along the radial direction of the second rubber ring, and one end of the second connecting rod is slidably arranged in the second connecting tube.

6. A vacuum interrupter according to claim 1, characterized in that: The corrugated sleeve also includes an upper fixing ring and a lower fixing ring, and the upper fixing ring and the lower fixing ring are both coaxially arranged with the porcelain tube; the upper fixing ring is fixedly connected to the upper end of the middle bellows, and the upper fixing ring is fixedly connected to the porcelain tube; the lower fixing ring is fixedly connected to the lower end of the middle bellows, a protective cover is fixedly arranged on the moving conductive rod, and the lower fixing ring is fixedly arranged on the protective cover.

7. The vacuum interrupter according to claim 1, characterized in that: A static contact is fixedly arranged at the upper end of the static conductive rod, and a moving contact is fixedly arranged at the lower end of the moving conductive rod. The moving contact is used to contact the static contact.

8. A vacuum interrupter according to claim 7, characterized in that: A shielding cylinder is fixedly arranged inside the porcelain cylinder. The shielding cylinder and the porcelain cylinder are coaxially arranged. The shielding cylinder is located in the middle of the porcelain cylinder, and the moving contact and the static contact are both located in the shielding cylinder when in contact.

9. A vacuum interrupter according to claim 6, characterized in that: The porcelain cylinder includes a cylinder body, a movable cover plate and a static cover plate; the cylinder body is vertically arranged, the movable cover plate is fixedly arranged at the upper end of the cylinder body, and the upper fixing ring and the movable cover plate are fixedly connected; a guide sleeve is fixedly arranged on the movable cover plate, the guide sleeve and the porcelain cylinder are coaxially arranged, a first through hole is opened on the guide sleeve, a second through hole is opened on the movable cover plate, the movable conductive rod passes through the first through hole and the second through hole in turn, and is slidably arranged in the first through hole and the second through hole; the static cover plate is fixedly arranged at the lower end of the cylinder body.

10. A method for assembling a vacuum interrupter, used for a vacuum interrupter according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, install the static conductive rod into the lower end of the porcelain cylinder; S2, sleeve the middle bellows on the outside of the moving conductive rod; S3, first install the first rubber ring on the inner side of the middle bellows, and then install the inner bellows on the inner side of the first rubber ring; S4, then installing the second rubber ring on the outside of the middle bellows, and then installing the outer bellows on the outside of the second rubber ring; S5, finally install the moving conductive rod into the upper end of the porcelain tube.

Images