Vacuum alternating-current contactor for mechanical emergency

[0025] The present invention will be further described below in conjunction with the drawings and embodiments.

[0026] A vacuum AC contactor capable of mechanical emergency action, which is composed of an insulating power isolation frame 1, a metal back sealing plate 2, an electromagnetic operating mechanism, a manual operating mechanism and a vacuum switch tube component 3. The electromagnetic operating mechanism has a closing and holding The gusset 4, the driving arm 5, the closing armature 6, the closing coil 7, the opening coil and the opening spring 8. Among them, the inflection point of the driving arm 5 is installed on the closing shaft 9, and one of the driving arm 5 The arm is the closing armature 6, the end of the arm tightly presses the opening spring 8, and the other arm is connected to the moving contact of the vacuum switch tube component 3; there is a closing coil 7 under the closing armature 6; the closing retaining plate 4 has a buckle at one end The plate tension spring 10 pulls, and the other end has a clasp to block the closing armature 6; it is characterized in that; at the longitudinal center position of the closing armature 6 and the upper (or side) position in the horizontal direction, a counterbore 11 is opened; The countersunk hole 11 passes through the hole from the inside to the outside. The diameter of the through hole is φ7.5mm. The hole has a countersunk depth of 4mm from the inside out; the diameter is φ12mm; There is also a through hole 12 at the upper position in the transverse direction; the through hole diameter is φ12mm; a long tie rod 13 passes through the through hole 12 on the metal rear sealing plate 2; the long tie rod 13 has a diameter of φ5mm and a length of 180mm; long tie rod The capped part 14 of 13 is connected to the countersunk hole 11 on the closing armature 6. The capped part of the long tie rod 13 has a thickness of 3.5mm and a diameter of φ11mm; the other end of the tap is 45mm long; the tapped part of the long tie rod 13 is connected to the manual The "L"-shaped pull hook 15 on the linkage rod 16 of the operating mechanism is connected.

[0027] The above-mentioned "L"-shaped pull hook 15 is fixed on the linkage rod 16 with a through hole φ7mm on one wing; the wing end of the other wing has a circular hole 17 with a circular hole φ10mm; let the tapped part of the long pull rod 13 pass through the circular hole 17, And there are two adjusting nuts for locking; "L" shaped hook 15 adopts national standard 50# angle iron, with a cutting width of 48mm; "L" shaped hook 15 has 2 pieces.

[0028] The above-mentioned manual operating mechanism adopts a spring energy storage type quick closing/ quick opening structure.

[0029] The linkage rod 16 of the manual operating mechanism is square and the output stroke is adjustable; the linkage rod 16 is 230mm long and 16mm wide; in the linkage rod 16 corresponding to the installation via position of the AC vacuum contactor, the parallel via tapping diameter is φ8mm.

[0030] Assembly method: Pass the long pull rod 13 through the closing armature 6 of the vacuum contactor and the metal rear sealing plate 2; install and fix the vacuum contactor and the manual operating mechanism; the longitudinal installation position of the long pull rod 13 is longer than the linkage rod of the manual operating mechanism The position of 16 is 31mm lower, and the lateral position is 8mm lower than the position of the linkage rod 16 of the manual operating mechanism; the "L"-shaped pull hook 15 is oriented and installed on the linkage rod 16, and the "L" shape is tightened with a double nut The extra tapping part outside the hook 15.

[0031] Functional description of the mechanism components: It has manual closing/opening function. There are two methods for motorized opening: one electric divide, that is, the opening can be realized by applying AC220V voltage to the opening coil; the other hand divide, that is, the manual operating mechanism is pulled The control handle can be opened to the opening position.

[0032] After actual measurement and testing, the stroke and pulling force of the manual operating mechanism completely meet the pull-in and release strokes of the closing armature 6 of the vacuum AC contactor that can be mechanically emergency action. And test that the vacuum switch tube component 3 can be reliably closed and disconnected. Because the linkage structure of the manual operating mechanism is simple and reliable, and after the adjusting nut is fixed, two sets of AC vacuum contactors can be driven at the same time to achieve synchronous suction and release.