7results about How to "Increase the opening speed" patented technology

This utility model relates to a double-acting arc-extinguishing chamber based on ball screw transmission, including a housing, a moving contact and a stationary contact disposed within the housing, a ball screw rotatably disposed within the housing, a first fixed block fixedly connected to the moving contact, and a second fixed block fixedly connected to the stationary contact. One end of the ball screw is connected to a drive device. The ball screw has a first threaded section and a second threaded section with opposite directions of rotation. The first fixed block is threadedly connected to the first threaded section, and the second fixed block is threadedly connected to the second threaded section. A first guide rail is fixedly disposed on the housing, slidingly engaging with the first fixed block, and a second guide rail is slidably engaged with the second fixed block. This utility model, through ball screw transmission, converts rotational motion into linear motion of the first and second fixed blocks, realizing the opposite or opposite movements of the moving and stationary contacts, improving the closing and opening speeds of the arc-extinguishing chamber, shortening the breaking time, and effectively improving the breaking capacity of the circuit breaker.

The application relates to an insulating pull rod assembly and a vacuum circuit breaker. The insulating pull rod assembly comprises: an elastic buffer structure, which comprises a limiting substructure, at least two elastic deformation insulating strips and a first connecting part; the limiting substructure comprises an upper limiting table and a lower limiting column, the lower limiting column comprises a first limiting end connected with the upper limiting table and a second limiting end away from the first limiting end; the at least two elastic deformation insulating strips are coaxially distributed around the lower limiting column, one end of the elastic deformation insulating strip is fixedly connected with the upper limiting table, and the other end of the elastic deformation insulating strip is fixedly connected with the first connecting part; an insulating pull rod, the insulating pull rod and a moving conducting rod of the vacuum circuit breaker are fixedly connected on the two sides of the elastic buffer structure, the insulating pull rod is connected with the first connecting part, and the upper limiting table is connected with the moving conducting rod of the vacuum circuit breaker. The application can reduce the moving quality of the vacuum circuit breaker.

This utility model discloses a movable, protective, prefabricated steel formwork, belonging to the field of formwork technology. The movable, protective, prefabricated steel formwork includes two identical formwork shells. Each formwork shell is equipped with: a movable part located on the lower side of the formwork shell for driving its displacement; a working platform fixed to the upper side of the formwork shell, with a protective fence on its outer side; one of the protective fences has a gap, and the working platform has a protective door at the gap. This utility model reduces site occupation and optimizes the space utilization of the prefabrication yard by incorporating the movable part; furthermore, the working platform, in conjunction with the protective fence, ensures the safety of operators.

The contact system comprises a button piece, a handle mechanism, a moving contact mechanism and a static contact which are arranged in a linear movement mode, the handle mechanism comprises a handle piece arranged in a rotating mode, a first connecting rod is arranged between the button piece and the handle piece, and the button piece drives the moving contact and the static contact of the contact mechanism to be in contact and separated through the handle piece. The moving contact mechanism is provided with an elastic mechanism, the handle piece is provided with a second sliding groove, the first connecting rod is provided with a second sliding part inserted into the second sliding groove, the second sliding groove is provided with a second closing end and a second opening end which are oppositely arranged, and when the elastic mechanism releases energy and drives the moving contact to be away from the static contact, the second sliding part is inserted into the second sliding groove. The second opening end of the second sliding groove slides in the direction away from the second sliding part, so that the handle piece is prevented from blocking the second sliding part when the moving contact is away from the static contact, the button piece does not need to completely move to the opening position, and the opening action is started before the button piece moves in place. And the opening process is realized under the driving of the elastic mechanism of the moving contact mechanism.

This invention relates to the field of throttle valve technology and discloses an ultra-high pressure zero-leakage throttle valve based on pressure rating. The valve includes a main body shell, with a sealing tube mounted on the top outer wall of the main body shell. A rotating handle is located at the top of the sealing tube. Two sets of semi-circular sealing plates are rotatably connected to one end of a limiting ring via U-shaped plates. The other end of the limiting ring is slidably connected to a support rail. When the two sets of semi-circular sealing plates move, the guiding effect of the support rail and the limiting ring causes their opposite ends to simultaneously converge towards the center end of the support rail. Simultaneously, the pressure of the flowing liquid applies pressure to the center end of the support rail, thereby reducing the liquid pressure on the rotating shaft driven by the rotating handle, which in turn drives the lead screw. This reduces the force required to open the device, facilitating easier device operation.

This invention provides a switching device. The switching device includes: a stationary contact and a moving contact assembly. The stationary contact assembly includes a first stationary arc contact, and the moving contact assembly includes a first moving arc contact and a cylinder. The moving contact assembly also includes a pull rod and a second moving arc contact. The pull rod passes through the cylinder to drive the moving contact assembly toward or away from the stationary contact assembly. The second moving arc contact is disposed on the pull rod. The switching device further includes: a piston assembly, including a piston structure and a second stationary arc contact located within the cylinder. The piston structure divides the inner cavity of the cylinder into a first and a second air chamber. The first moving arc contact and a portion of the second stationary arc contact are located in the first air chamber, and the second moving arc contact and another portion of the second stationary arc contact are located in the second air chamber. The moving contact assembly has a nozzle communicating with the first air chamber. This invention solves the problem in the prior art where the opening rate of the switching device is relatively low, affecting its switching capacity.

The utility model relates to the technical field of solid-sealed polar poles, and discloses a solid-sealed polar pole for a magnetically controlled circuit breaker, which comprises an outdoor epoxy shell, the top end of the outdoor epoxy shell is fixedly connected with a wire inlet terminal, the bottom of the wire inlet terminal is provided with a vacuum arc-extinguishing chamber, the wire inlet end of the vacuum arc-extinguishing chamber is provided with an extended copper conductive rod, and the wire inlet terminal of the vacuum arc-extinguishing chamber is fixedly connected with the outdoor epoxy shell. The movable end of the vacuum arc-extinguishing chamber is fixedly connected with a flexible connector, an insulating pull rod is fixedly connected below the flexible connector, a wire inlet side voltage sensor is installed on the middle lower portion of the rear end of the inner side of the outdoor epoxy shell, and a low-power-consumption phase current sensor and a zero-sequence current sensor are installed on the wire outlet side. A current transformer is installed in the outdoor epoxy shell. According to the utility model, a low-contact-pressure vacuum arc-extinguishing chamber scheme is adopted, and the low-contact-pressure scheme can effectively prolong the service life of the contact and increase the opening speed, so that the special function of rapid opening is achieved.