38 results about "Trapezoid body" patented technology

The invention discloses a wireless passive rope tension sensor based on surface acoustic waves. The wireless passive rope tension sensor comprises a T-shaped stress seat, three surface acoustic wave resonators, a shell and an antenna, wherein the shell is oval in shape, and two ends of the shell are provided with through holes through which a rope can penetrate; the antenna is arranged on the outer surface of the shell; the T-shaped stress seat is fixedly arranged in the shell and composed of two arms and a pedestal; one end, away from the pedestal, of each arm is provided with an inverted triangular body; the pedestal is a trapezoid body of which the upper end is provided with a groove for fixing the rope; the lower part of the inverted triangular body is provided with a through hole for fixing the rope; two of the three surface acoustic wave resonators are symmetrically arranged on the two arms, and the other one is arranged on the pedestal. The sensor makes change of the tension to be sensitive through the surface acoustic waves, working capacity of the sensor is from a receiving and transmitting antenna, sensitive force is represented by change of resonant frequency of the surface acoustic waves and transmitted in a wireless manner, and thereby wireless passive tension detection is achieved.

The invention discloses a vertically-inserting-type ceramic tile locating horizontal mounting device in the field of building decoration, wherein the vertically-inserting-type ceramic tile locating horizontal mounting device brings convenience to ceramic tile paving. The device is composed of a locating seat and a compressing block. The locating seat is vertically connected to the center of a hexagonal base plate through a rectangular rack, a rectangular shallow groove is formed in the position, perpendicular to the rack, of the bottom face of the base plate, the area of the rectangular shallow groove is equal to the area of the cross section of the rack, and the two ends of the base plate turn upwards, are arc-shaped and have elasticity. The compressing block is composed of two pairs of trapezoid bodies and is cross-shaped either looked downward or upward. A rectangular hole is formed in the upper end of the compressing block, the rectangular hole is matched with the rack of the locating seat, a metal pressing plate is arranged on one side of the compressing block, and one end of the pressing plate is meshed with the rack. According to the vertically-inserting-type ceramic tile locating horizontal mounting device, the size of a gap between two tiles can be controlled, and the flatness of the surface between the tiles can also be controlled. In addition, the vertically-inserting-type ceramic tile locating horizontal mounting device has the advantages of being convenient to use, greatly improved in working efficiency, simple in structure and low in production cost, and lowering use cost due to the fact that the compressing block can be used repeatedly.

The invention discloses a permeable double-row retaining wall for urban buildings, and belongs to the technical field of foundation maintenance of the urban buildings. A water delivering pipe is pre-buried in a concrete base, and upper-layer concrete wall bodies of the retaining wall are connected with the concrete base arranged below the ground; the first row of concrete wall body and the secondrow of concrete wall body are connected through a reinforcing rib plate to form a hollow trapezoid body, and groove interior permeable holes are formed in the bottom of the hollow trapezoid body; a plurality of rows of permeable holes are formed in the second row of concrete wall body and penetrate through the concrete wall body; and a gravel backfill layer is laid on the hollow trapezoid body. The retaining wall is good in structural stress performance, easy to implement, good in stability, small in size and low in self-weight, and has good drainage capacity, and meanwhile through combinationof the double-row concrete wall bodies and the reinforcing plate, the anti-sliding and anti-toppling capability of the retaining wall is enhanced.

The invention discloses a high heat dissipation resin grinding wheel which comprises a through hole, a fixed plate, a heat dissipation layer, a fiber reinforced network, an annular resin supporting plate and a grinding layer, wherein a plurality of arc blades are arranged on the heat dissipation layer and are distributed radially in a circular way by surrounding the center of the through hole, the best included angle A formed between an upper rotating bevel of the annular resin supporting plate and the horizontal plane is 25 degrees, and the best included angle B formed between a lower rotating bevel of the annular resin supporting plate and the horizontal plane is 25 degrees. The high heat dissipation resin grinding wheel can be made into an annular supporting plate in the shape of an annular trapezoid body by adjusting the angle between the upper rotating bevel and the lower rotating bevel, the thick end of the annular supporting plate can ensure hardness of annular bakelite supporting plates, and the thin end can ensure the toughness.

The invention discloses a method and structure for removing multi-screen splicing black seams, and belongs to the technical field of splicing screen seamless splicing. The method includes the steps that firstly, acrylic boards are made into a trapezoid structure through the thermoplastic technology, wherein a material low in refractive index and a material high in refractive index are distributed in a mould and then heated and subjected to hot press molding to form a trapezoid body, and after demoulding, composite ground glass formed in a composite mode is subjected to edge cutting and surface treatment; the surface and periphery of the composite ground glass obtained through hot press molding is ground and polished to 400 mesh or above, then a surface treating agent and a composite glass periphery treating agent are sprayed, the number of the acrylic boards is nine, and the acrylic boards are distributed in a 3*3 array; secondly, two acrylic boards are horizontally laid and attached together; thirdly, glass is attached to the front sides of the two acrylic boards which horizontally laid and attached together in the second step; fourthly, the acrylic boards attached with the glass in the third step are attached to the outer surface of a splicing screen.

The invention relates to a suspended self-locking type prestress tensioning platform, and belongs to the technical field of construction equipment. The prestress tensioning platform is suspended on ear walls at two ends of a bent cap, is used for performing prestressed tensioning on the bent cap, and comprises a trapezoidal frame and a platform panel positioned at the bottom of the frame, a safetyprotection plate is arranged on the back surface of the frame, safety guardrails are arranged on two side surfaces of the frame, and a balance support top block is arranged at the lower part of one surface, facing the ear walls of the frame; the top of the face, facing the ear walls, of the frame extends outwards to form an extending section, the end of the extending section is provided with a self-locking hook used for being hooked to stop blocks of the ear walls, and the top of the frame is further provided with a guide rail which is provided with a chain block used for hanging a jack. Theplatform has the advantages of being simple and convenient to mount and dismount, safe and reliable in structure, convenient to suspend and operate by personnel, free of influence of the ground clearance and high in applicability.

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 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 heating machine structure capable of improving the thermal insulation effect. A material opening communicated with the inner portion of a shell is formed in the side wall of a shell. A thermal insulation sleeve is sleeved with the material opening. The outer wall of the thermal insulation sleeve is simultaneously attached to the side wall of the shell and the inner wall of the material opening. A vent hole is formed inside the thermal insulation sleeve. The bottom face, provided with the small area, of a trapezoid body is arranged inside the material opening, and the bottom face, provided with the large area, of the trapezoid body is arranged outside the shell. A sealing block is arranged on the side wall, provided with the material port, of the shell, and is connected with a rotating handle. The end, away from the sealing block, of the rotating handle is connected with the side wall, provided with the material opening, of the shell. The rotating handle can rotate around an end of the rotating handle. The sealing block is 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. The heating machine tightly seals the material opening through the rotatable structure and the trapezoid body mechanism with the inclined side walls, and therefore heat is sealed in the shell and can not be dissipated, heat is saved, and safety of operators is ensured.

The invention relates to a semi-circular tube plate forged piece forming method capable of improving the utilization rate of a blank. Firstly, an equal-length trapezoid body - rectangular composite blank composed of a trapezoid body and a rectangular body which are the same in length is forged; and then extruding is carried out from the two sides in the width direction of the equal-length trapezoid body - rectangular composite blank, drawing is carried out in the length direction of the equal-length trapezoid body - rectangular composite blank so as to enable the equal-length trapezoid body -rectangular composite blank to be deformed into an equal-thickness trapezoidal plate and rectangular plate composite flat plate, and the equal-thickness trapezoidal plate and rectangular plate composite flat plate is cut into an arc surface of a semi-circular tube plate forged piece so as to obtain the semi-circular tube plate forged piece. Compared with the prior art that a purely rectangular section is adopted to wrap a semi-circular section, the manner that an isosceles trapezoid and rectangular composite section is adopted to wrap a semi-circular section can reduce excess materials left after cutting, so that the size of an original blank is reduced, the blank can be saved, the utilization rate of the blank is improved, the production cost is reduced, and popularization and applicationare facilitated.

The invention relates to a wind blocking board in a heat preservation box. The wind blocking board comprises a trapezoid body with big top and small bottom, wherein the trapezoid body is formed by a bottom board and two lateral boards inclining outwards. A connection board is arranged on the left side of the bottom board, an included angle formed by each lateral board and the bottom board ranges from 125 degrees to 135 degrees, a long strip-shaped wind distribution board is arranged at the lower portion of the bottom board and is perpendicular to the bottom board, and an included angle formed by the wind distribution board and the trapezoid body ranges from 55 degrees to 75 degrees. The wind blocking board is suitable for being used in the heat preservation box for producing chemical fiber dacron fully-drawn yarns (FDY).

The invention discloses an anti-explosion type narrow light distribution LED tunnel lamp. The LED tunnel lamp comprises a lamp casing and an LED light source unit, wherein the lamp casing comprises a top cover, an upper casing component, a middle casing component, a lower casing component and a protective mesh; the top cover and the upper casing component are fixed by adopting a planar anti-explosion way, the upper casing component and the middle casing component are fixed by adopting a cylindrical anti-explosion way, and the middle casing and the lower casing are fixed are fixed via the planar junction surface of a hole, which is outside the casing; the lower casing component is provided with a lower casing main body and a transparent piece, and the protective mesh is fixedly arranged outside the transparent piece; the LED light source unit is fixed on the middle casing component, and comprises a lamp main body in the shape of a trapezoid body, a first LED lamp light source and a second LED light source; and the first LED light source and the second LED light source are respectively arranged on the two opposite side surfaces of the trapezoid body. According to the invention, the light utilization rate can reach 100 percent at most, and in addition, the structural anti-explosion effect is good and can synchronously satisfy the first-class and second-class anti-explosion requirements of the National Anti-explosion Standard.

The invention relates to a music instrument and discloses a dragon-shaped harp. The dragon-shaped harp comprises an arc-shaped framework and a base, wherein a plurality of curling bodies are arranged at the bottom of the arc-shaped framework; a plurality of elliptical connected combined bodies are arranged at the upper part of the arc-shaped framework; a waved body is arranged at the end part of the arc-shaped framework; an opening is formed in the lower part of the waved body; the end part of the opening is upward warped; a trapezoid body is arranged on the left side of the waved body; the arc-shaped framework is fixed on the base; an interface circuit and a music sound source amplifier are arranged in the base; a laser diode is arranged in an inner cavity of the bottom of a round framework; a sensor is arranged in an inner cavity of the upper part of the round framework; a laser beam generated by the laser diode is connected with the sensor; the sensor is used for converting a light signal into an electrical signal which is communicated with the interface circuit; the interface circuit is communicated with the music sound source amplifier. The dragon-shaped harp disclosed by the invention is attractive and novel, can be used as a decoration and a gift and can be also used as a laser harp taking the laser beams as strings.

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 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 the field of nuclear fuel element welding, particularly relates to a positioning grid special-shaped spot-welding electrode, and aims to solve the problem that a grid direction needs to be continuously changed during the resistance spot welding of a domestic 300MW nuclear fuel assembly positioning grid, reduce the operation difficulty and improve the welding quality stability. The positioning grid special-shaped spot-welding electrode is characterized in that the positioning grid special-shaped spot-welding electrode is in a strip plate shape as a whole and is dividedinto a left part, a middle part and a right part; an end head is arranged on the left part and is in a right-angled trapezoid body shape, an upper bottom edge is arranged at the left end, a right-angled edge is arranged at the upper end, and a bevel edge is arranged at the lower end; an included angle between the right-angled edge and a horizontal line ranges from 6.85 degrees to 7.15 degrees, andan included angle between the bevel edge and the right-angled edge is 14 degrees; an arc-shaped section is arranged in the middle part and is in an 'S' shape as a whole, a 'V' concave part is arranged at the upper end, an included angle between the 'V'-shaped left side edge and the right-angled edge of the end head is larger than or equal to 20 degrees, and an included angle between the right side edge of the end head and the horizontal line is larger than or equal to 14.85 degrees; and a fixed end is arranged on the right part and is in a cuboid shape as a whole, and two fixing holes are formed so as to be used for fixing the electrode during welding.

The invention discloses a novel feeding trough. The feeding trough comprises a hopper and a hollow base; the hopper is composed of a left side plate, a right side plate, a front side plate, a rear side plate and an inclined plate; the hollow base comprises a trough opening, a trough opening baffle, a rope hole, shaft holes, a material blocking plate and a base front side plate; the rope holes areformed in the trough opening baffle; and the shaft holes are formed in two sides of the hollow base. The feeding trough is characterized in that the hopper is a trapezoid body with a wide upper part and a narrow lower part; the bottom of the hopper is clamped in the hollow base; the trough opening baffle is fixed above the trough opening through the shaft holes; the area of the trough opening baffle is larger than the area of the trough opening; the material blocking plate is horizontally installed on the upper edge of the base front side plate and extends towards the inside of the hollow base; and the rear side plate is provided with a clamping groove.

The invention relates to a writing pad for regulating writing posture. The writing pad comprises a cuboid, a right-angle trapezoidal body, a safety infrared or safety acoustic wave emitting hole, a safety infrared or safety acoustic wave generator, a safety infrared or safety acoustic wave emitting hole adjusting angle knob, a display screen, a warning light belt, a battery, a battery bin, a charging interface USB, a power switch, a loudspeaker (home version). When the writting sitting posture leans forward, an alarm device is triggered, so that a writer is warned to correctly adjust the sitting posture, and thus the writing pad plays a key role on developing a good writing habit for the writer, and on ensuring normal and good development of the body.

The invention discloses a wire protection board, being provided with a trapezoid body, wherein rubber strips are pasted on the larger bottom surface, which contacts with the ground, of the trapezoid body, and at least one groove for accommodating wires is formed in the larger bottom surface, which contacts with the ground, of the trapezoid body; the upper surface of the trapezoid body is provided with antiskid lines; when the width of the groove is larger, a supporting bar can be arranged in the groove along the extending direction of the groove.