5results about How to "Keep closed" patented technology

This invention discloses an automatic switching system, method, and drive circuit for an uninterruptible power supply (UPS) in the field of power electronics. It includes a power module for providing electrical energy to the system; a relay switch unit for controlling the switching of mains power input; an accelerated turn-off unit for accelerating the turn-off of the relay switch unit; a circuit switching unit for switching a high-current drive circuit to a low-current drive circuit after a predetermined delay; and a control module for outputting a high-level signal to control the circuit switching unit to switch the high-current drive circuit to accelerate the closing of the relay switch unit, and outputting a low-level signal to control the accelerated turn-off unit to accelerate the turn-off of the relay switch unit. This invention employs a delayed switching drive design and an accelerated turn-off unit, which significantly simplifies the power supply hardware design, reduces the power requirements of the auxiliary power module, and significantly shortens the relay turn-off time, ensuring the stability and reliability of the UPS during the switching process.

The invention relates to the technical field of medical instruments, in particular to a hydrops drainage device based on head and neck surgery, which comprises a drainage tube connected with a surgical wound, and one end, far away from the surgical wound, of the drainage tube is communicated with a negative pressure generation mechanism for forming negative pressure suction force; one end, far away from the drainage tube, of each flushing tube is communicated with a cleaning tank for storing normal saline; the drainage tube is further sleeved with an opening and closing mechanism used for controlling the flushing tube to be communicated with the drainage tube, the opening and closing mechanism comprises a closed tank and a blocking plate, the blocking plate is located between the closed tank and the flushing tube, a sealing cavity is formed in the closed tank, air pressure in the sealing cavity is consistent with negative pressure suction in the drainage tube, and an elastic film is arranged between the sealing cavity and the drainage tube in a dividing mode. One end of the blocking plate is located in the sealing cavity, and the other end communicates with the flushing pipe; the drainage tube is used for achieving automatic dredging treatment of blockage of the drainage tube, it is guaranteed that effusion drainage is continuously conducted, and the infection risk and complications are reduced.

The application discloses a novel intelligent lung rehabilitation dynamic monitor, which comprises a monitoring seat, a control panel, a myoelectricity electrode, an arc-shaped gasket and a dynamic adjusting mechanism, wherein the dynamic adjusting mechanism comprises a displacement mechanism, a hollow tube, a spring, a moving rod, a flexible balloon, a magneto-rheological fluid, an electromagnet and a current adjusting mechanism; the arc-shaped gasket can be attached to the chest cavity of a user through the displacement mechanism, so that the myoelectricity electrode can collect lung myoelectricity signals; the expansion and contraction of the chest cavity during the breathing process of the user can drive the moving rod to move, and the current adjusting mechanism is used for adjusting the current size delivered to the electromagnet; the viscosity of the magneto-rheological fluid is adjusted through the change of the magnetic field intensity, and then the rigidity of the flexible balloon is changed; during inhalation, the flexible balloon with larger rigidity can keep the movement of the moving rod stable; the rigidity of the flexible balloon decreases during breathing, and the spring can pull the moving rod to reset, so that the myoelectricity electrode can stably collect myoelectricity signals, thereby being used for evaluating the rehabilitation effect of the lung of the user.

The utility model discloses a raw material screening device for ceramic membrane production, and relates to the technical field of ceramic membrane filtration, the raw material screening device comprises an upper cover, a tank body and a material screening pocket, the upper end of the material screening pocket is provided with an opening, the side wall and the bottom of the material screening pocket are provided with arrayed meshes, the upper cover is installed above the tank body through threads, and a truss is fixedly arranged below the tank body. A lower connecting seat is fixedly arranged at the bottom of the rotating shaft; a connecting groove is formed in the bottom of the lower connecting seat; a connecting column is fixedly arranged at the position, corresponding to the connecting groove, of the truss; the position, surrounding the connecting groove, of the bottom of the lower connecting seat is a diagonal plane; a sealing ring is fixedly arranged at an opening in the upper end of the screening bag in a surrounding mode, and an upper ring groove is fixedly formed in the position, corresponding to the sealing ring, of the upper cover. The material screening device is simple in structure, high in working efficiency, high in practicability and suitable for popularization, and the material screening speed is increased by driving the material screening structure to rotate and vibrate up and down.

The utility model relates to the technical field of valve welding, and discloses a valve connecting pipe welding clamp which comprises an upper plate and a lower plate, side edge fixing plates are arranged on the two sides of the upper plate and the two sides of the lower plate to form a closed area, and connecting hole positions are arranged behind the upper plate and the lower plate and used for installing the clamp on the fixing plates. The clamp is used for arranging the outlet end of a valve between the upper plate and the lower plate and welding a connecting pipe connected to the upper portion of the outlet end, a round hole is formed in the lower plate and used for allowing the outlet end of the valve to enter, and a hexagonal hole is formed in the upper plate and used for allowing a hexagonal connecting pipe to enter. The height of the clamp is increased, so that enough space is provided during argon arc welding operation, and the welding quality and efficiency are improved.