38 results about "Trapezoid body" patented technology

The invention relates to an implantation angle collimator for acetabulum prostheses, which comprise a right angle trapezoid body with an acute angle of alpha, a first bevel protractor with an included angle of beta, a second bevel protractor with an included angle of gamma, a gradienter and a guide rod. The alpha is larger than 75 degrees and smaller than 80 degrees, the beta is larger than 40 degrees and smaller than 45 degrees, and the beta plus the gamma is equal to 90 degrees. An inclined waist face of the right angle trapezoid body is arranged at the top, a right angle face opposite to the inclined waist face is positioned at the bottom, another two right angle faces are positioned on the left side and the right side, the gradienter is positioned on the inclined waist face, the bottom of the right angle trapezoid body is arranged on the guide rod, slide grooves are respectively arranged on the front lateral side and the rear lateral side of the right angle trapezoid body, and one sides of the first bevel protractor and the second bevel protractor are positioned in the slide grooves on the front lateral side and the rear lateral side and can move along the slide grooves. The implantation angle collimator resolves the problems that an operator is low in implantation location accuracy and large in error relying on experience and according to topography signs. The implantation angle collimator is simple in operation, economic and practical, widely applied to the medical field and capable of meeting clinical requirements well.

The invention relates to the field of valves, in particular to a three-way valve. The three-way valve comprises a valve body, wherein a cavity, and a first channel, a second channel and a third channel which are respectively communicated with the cavity are formed in the valve body; a valve core is arranged in the cavity; the valve core consists of two trapezoid bodies which are arranged in a longitudinal symmetry manner and a cylinder which is sandwiched between the two trapezoid bodies; a sealing ring is arranged on the periphery of the cylinder; the first channel is selectively communicated with the second channel and the third channel by the matching of the valve core and the cavity; a push rod is arranged on the upper surface of the valve core, penetrates through the upper end of the valve body, and extends out of the valve body; clamping rods in the horizontal direction are arranged on the two sides of the push rod; a clamping seat corresponding to the clamping rods is arranged in the valve body. The defect that the service life of the valve core is short because the valve core of the original three-way valve is required to be rotated is overcome; the service life of the three-way valve is prolonged; the production cost is reduced.

The invention relates to the technical field of material conveying equipment, in particular to a keycap conveying device. The keycap conveying device comprises a vibration material conveyer; a rail for conveying keycaps is arranged in the cavity of the vibration material conveyer; the rail is formed by four long strip-shaped rails and has a function of accommodating trapezoid bodies; the rail extends upwards from a bottom surface in the cavity to form a spiral twisting rail; the vibration material conveyer is used for conveying the keycaps in the cavity to the rail; a screening device is fixedly arranged on the rail; and the screening device comprises a top screening block, side screening blocks and a bottom screening block and is used for screening keycaps which are not placed according to requirement and move on the rail. By adopting the keycap conveying device, the keycaps can be conveyed according to placement requirement.

The invention discloses a heating machine structure capable of improving the sealing stability. A material opening communicated with the inner portion of a shell is formed in the side wall of the shell. A thermal insulation sleeve is sleeved with the material opening. A through hole is formed in the thermal insulation sleeve. A sealing block is arranged on the shell and of a trapezoid body structure matched with the through hole. The side wall of the sealing block makes seamless contact with the side wall of the through hole. Locking mechanisms are arranged on the shell and symmetrically arranged on the two sides of the thermal insulation sleeve. Each locking mechanism comprises a fixed block and a locking pin, wherein the locking pin penetrates through the fixed block. An isolation block is fixed to the sealing block. Connecting plates are symmetrically arranged on the side walls of the isolation block respectively. Hinge pins are arranged on the connecting plate. One end of each hinge pin is arranged inside the isolation block after penetrating through the corresponding connecting plate. The top ends of the connecting plates cave inwards to form through grooves communicated with the symmetrical side walls of the isolation block. One end of each locking pin is arranged inside the corresponding through groove. The mechanical locking structure is adopted for the heating machine structure, and therefore fixed sealing can be kept under the condition that internal pressure changes, and sealing performance is improved.

The invention discloses a compact type optical circulator with four ports. The optical circulator comprises a first double-fiber collimator, a first beam splitting / combining component, a first polarization converting component, an optical path converting element, a second polarization converting component, a second beam splitting / combining component and a second double-fiber collimator which are sequentially arranged along the integral axial direction of the device, wherein each double-fiber collimator is formed by a thermally expanded core fiber head and a C-lens; each beam splitting / combining component is in a birefringent crystal structure presenting a trapezoid body shape, and a left inclined plane and a right inclined plane which form the same included angle with the lower surface of the crystal structure face the light transmission direction; the optical path converting element presents a wedge angle sheet pair structure which is combined by two wedge angle sheets with matching angles, and the optical axes of the two wedge angle sheets are mutually orthogonal. According to the optical circulator, the integral volume of the device can be reduced effectively, the input and the output of the optical circulator are maintained on a spindle, and therefore production assembly, optical path debugging and device packaging are facilitated.

The invention discloses a curb mold facilitating installation of an airfield runway guide light. The curb mold facilitating installation of the airfield runway guide light comprises an upper mold body and a lower mold body. The upper mold body comprises an upper cover and an upper shell, first fixing holes and second fixing holes are formed in the four corners of the upper cover and the four corners of the upper shell correspondingly and fixedly connected through bolts, a first pouring opening is formed in the bottom end of the upper cover, a first trapezoid groove is formed in the middle of the upper shell, and a first line clamping groove is formed in the bottom of the first trapezoid groove. The lower mold body comprises a lower cover and a lower shell, and third fixing holes and fourth fixing holes are formed in the four corners of the lower cover and the four corners of the lower shell correspondingly. The effect of convenient installation is realized by arranging the first trapezoid groove and a second trapezoid body. The effect of convenient installation of wires is realized by arranging the first line clamping groove and a second line clamping groove. A curb can make more tight and stable contact with the ground by arranging contacts. Therefore, the problem of installation cost of the curb and the guide light of an airfield runway is effectively solved.

The invention belongs to a liquid-type high-power microwave rectangular waveguide attenuator which is matched with a power microwave measuring system in a microwave device. The liquid-type high-power microwave rectangular waveguide attenuator comprises a wave conductor, a trapezoid body attenuation liquid container, attenuation liquid, a forced circulating cooling system, wherein the trapezoid body attenuation liquid container is arranged in the waveguide body and is provided with an attenuation liquid inlet and an attenuation liquid outlet, the cooling tank containing attenuation liquid is arranged outside the wave conductor and is communicated with, the forced circulating cooling system comprising the attenuation liquid container, a circulating pump and an attenuation liquid circulatingpipe. The invention adopts trapezoid body liquid crystal glass as the attenuation liquid container, takes saline solution as attenuation liquid and adds the forced circulating cooling system, and thus the liquid-type high-power microwave rectangular waveguide attenuator has wide working band, good stability, small standing-wave ratio, high power capacity, high cooling efficiency and high bearablemaximum average power. If being matched with matched with a power microwave measuring system,, the liquid-type high-power microwave rectangular waveguide attenuator can effectively attenuate large power signal to the range capable of being measured by the measuring system, which provides a favourable condition for accurately analyzing and measuring the signal, is favourable for expanding the application range thereof and the like.