32results about How to "Control flip" patented technology

Disclosed is a pin shaft winding wheel mechanism and a winding wheel system having an incomplete gear tilting mechanism for a window blind, wherein a winding wheel mechanism with a shaft pin comprises a base (38) and a top cover (39), a tilting cylinder (354) is provided between the base (38) and the top cover (39), a rotary shaft (357) passes through the tilting cylinder (354) and is mounted on a support seat (384) formed between the base (38) and the top cover (39), at least two push wheels (355) are fixedly connected on the hollow rotary shaft (357) inside the tilting cylinder (354), at least one winding wheel (351) is provided between adjacent push wheels (355), the winding wheel (351) is in a sliding connection with the hollow rotary shaft (357), at least one fan-shaped protrusion (3513) is provided on an outer ring of the winding wheel (351), wherein a hole (3512) is provided radially at one side of one fan-shaped protrusion (3513) and a pin hole (3551) is provided axially on a side edge of the outer winding wheel to make a pin shaft (356) pass through the pin hole (3551) and connect to two upper ends of a secondary ladder cord (8X) wound around the winding wheel outer ring. The secondary ladder cord (8X) is connected to a respective secondary blind slat (9X), an outer ring of the tilting cylinder (354) is provided with at least one annular groove (35X8) and a corresponding groove top part through-hole (3545) so as to enable the two upper ends of a main and the secondary ladder cord (8X) to be wound and nested therein while the secondary ladder cord (8X) enters the tilting cylinder (354) and is connected to the winding wheel (351). The main ladder cord (80) is fixed at the top part of the annular groove (35X8). A side edge of the push wheels (355) is provided with the shaft pin (356). The hollow rotary shaft (357) drives the rotation of the push wheels (355) and via the shaft pin (356) acts on the fan-shaped protrusion (3513) of the winding wheel outer ring to push the winding wheel (351) to rotate. The shaft pins (356) on each push wheel (355) are mutually spaced apart and provided with an angular difference, such that the winding wheels (351) are driven in turn thus raising in succession the respective secondary blind slats (9X) connected to the secondary ladder cord (8X) wound on the winding wheel (351). The winding wheel system having an incomplete gear tilting mechanism comprises the winding wheel mechanism with the shaft pin. The winding wheel system can control the lifting and tilting of the secondary blind slats (9X) and the tilting of main blind slats (90).

The invention discloses a movable threshold type double-leaf civil protection door structure and relates to the field of protection equipment. The structure comprises two protection doors, wherein a turnover groove is formed in the ground, a movable threshold is rotationally connected in the turnover groove, and the movable threshold comprises a sealing plate and an abutting plate perpendicularlyfixed on one side edge of the sealing plate; an accommodating groove is formed on the peripheral wall of the turnover groove, a shifting block is arranged in the accommodating groove, a main pull cordis arranged in the accommodating groove, two ends of the main pull cord are connected to two ends of the shifting block respectively, guide wheels are arranged on two sides of the shifting block, andthe main pull cord winds around the guide wheels and is in a tightened state; a pull assembly for pulling the main pull rope back and forth is arranged on one side of the shifting block; when the pull assembly pulls the main pull cord and drives the shifting block to move, the shifting block turns over the movable threshold and allows the sealing plate to abut against one side of each protectiondoor and the wall of the turnover groove, and then, the shifting block is supported on the lower side of the abutting plate. The threshold state is switched through turnover of the movable threshold,so that the movable threshold is more convenient to mount and dismount.

The present invention relates to an apparatus for controlling rotation and stopping of a microwave oven grill, wherein both ends of the grill are respectively provided with a first rotation shaft and a second rotation shaft, the first rotation shaft is placed on a bracket on the right side wall of a microwave oven cavity, and forms rotation matching with the bracket, the left side wall of the microwave oven cavity is fixed with a motor, an output shaft of the motor is connected with the second rotation shaft, the motor is a synchronous motor and is provided with a hall element, the second rotation shaft is provided with a magnetic element matched with the hall element, the hall element and an input end of a controller are connected, and the synchronous motor and an output end of the controller are connected. The present invention further discloses a controlling method for controlling the apparatus for controlling rotation and stopping of the microwave oven grill. According to the present invention, matching of the hull element and the magnetic element is adopted, such that the initial position of the motor can be determined and fixed, accumulated errors during a time control phase process can be eliminated; and the controller can be adopted to control flipping, pausing and positioning of the motor so as to control flipping, pausing and positioning of the grill; and the synchronous motor is adopted so as to reduce cost.

The invention provides a method for preventing coal mine tunnel floor type rock burst and belongs to the technical field of coal mine safe mining. The method for preventing coal mine tunnel floor typerock burst comprises the following steps that impact-hazard areas of different grades are divided, and prevention areas where rock burst prevention needs to be conducted are determined; a number of drilled holes are formed along the longitudinal direction in two sides of prevention area tunnel floors respectively; explosive charge is conducted in bottom-breaking blasting explosive segment, and blasting is conducted; expansive cement is injected into a first hole-sealing cement segment, and holes are sealed; yellow mud is poured to a yellow mud buffering zone; shearing deformation-resistant components are put into a shearing deformation-resistant component segment; and cement is injected into a second hole-sealing cement segment, and hole are sealed. By means of the method for preventing coal mine tunnel floor type rock burst, continuously increasing stress on bottom coal or soft rocks is lowered; the phenomenon of ultralow friction slippage in bottom coal or soft rock layer is reduced; the risk of occurrence of floor type rock burst is lowered; occurrence of floor rock burst can be effectively prevented; and the prevention effect of rock burst is improved.

The invention discloses a device for corrosion detection of underground pipe networks, which comprises a horizontal support rod and a vertical support rod, the right side of the horizontal support rod is connected to the vertical support rod in rotation, and the left side of the horizontal support rod is fixedly connected with an electric telescopic The left output end of the electric telescopic rod is fixedly connected with an adjustment support rod, the left side of the adjustment support rod is fixedly connected with an adjustment threaded rod, and the left side of the adjustment threaded rod is sleeved and threadedly connected with a first extension rod, the first The upper and lower sides of the extension rod close to the left side are fixedly connected with auxiliary support mechanisms, the left side of the first extension rod is fixedly connected with a second extension rod, and the upper and lower ends of the second extension rod near the left side are fixedly connected with cleaning mechanisms. The invention relates to the technical field of underground pipes. The device for facilitating the corrosion detection of the underground pipe network achieves the purpose of facilitating the corrosion detection operation of workers and improving the detection efficiency.