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232results about How to "Increased installation flexibility" patented technology

Four-quadrant frequency converter

The invention belongs to the technical field of frequency converters and provides a four-quadrant frequency converter. According to the four-quadrant frequency converter, a frequency converter is arranged between a power grid and an induction motor; an energy feedback unit is arranged at a direct current (DC) busbar side of the frequency converter; a negative pole end DC- of a direct current busbar on the frequency converter is electrically connected with the DC- of the energy feedback unit; the DC+ on the frequency converter is electrically connected with DC+ of the energy feedback unit; three-phase alternating current output of the energy feedback unit is connected to input sides R, S and T of the frequency converter in parallel; a PE (Protecting Earthing) terminal of the energy feedback unit is reliably connected to the ground; when the busbar voltage of the frequency converter is detected by the energy feedback unit to be up to a set valve, feedback electric energy is converted to power frequency and transferred to the power grid to carry out energy saving regulation. The four-quadrant frequency converter provided by the invention has the advantages that through an external energy feedback device, the electric energy produced by the motor is added to the input end to the frequency converter after feedback and an electric reactor is additionally arranged to avoid the harmonic pollution, so that the power factor is greatly improved and the efficient utilization ratio of the electric energy is realized.
Owner:ZHEJIANG NEW FOLINN ELECTRIC

Method for vertically laying HDPE geomembranes underground

ActiveCN106677199APrevent the spread of leaksGuaranteed Continuity IntegrityFoundation engineeringGeomembraneEngineering
The invention relates to a method for vertically laying HDPE geomembranes underground. In the method, a crane, a membrane expansion frame, a fixed depression bar and a balance weight are adopted. The method for vertically laying the geomembranes comprises the following steps; through the adoption of the technical scheme of the method disclosed by the invention, a vertical soft anti-seepage wall of continuous underground HDPE geomembranes can be established, so that migration and diffusion of contaminated soil or contaminants in underground water can be controlled, and further appropriate comprehensive methods for treating the contaminants can be adopted to gradually reduce and remove the contaminants, and recover the soil and water; the method disclosed by the invention is mature in equipment and technology, and safe to operate, and the vertical paving depth and the vertical paving speed can be flexibly controlled; the free combination of the balance weight and the HDPE geomembranes and the separation of the balance weight from the HDPE geomembranes are realized, and besides, the length and the width of the frame can be adjusted according to the needs of engineering, so that the construction efficiency is improved; the HDPE laying speed is controlled; the HDPE geomembranes can be stabilized and prevented from floating upwards; the purpose for vertically putting down the HDPE geomembranes is achieved by utilizing the free combination of the HDPE geomembranes and the membrane expansion frame and the separation of the HDPE geomembranes from the membrane expansion frame; and the continuity and the completeness of a wall body are guaranteed. The method disclosed by the invention is simple to operate, free from secondary pollution, safe and environmental friendly.
Owner:BEIJING GEOENVIRON ENG & TECH

Wire-bunching device for electronic communication cable

InactiveCN109787162ARealize guided movement functionGood orientationElectrical apparatusElectronic communicationEngineering
The invention provides a wire-bunching device for an electronic communication cable. The device comprises a support platform, a return spring, a wire-bunching block and a wire-bunching port, the support platform is welded at the lower side of the right end surface of an installing plate, a screw rod is welded on the right side surface of the support platform, the return spring is arranged on an external annular side surface of the screw rod in a sleeved manner, the left end of the return spring is connected with the right end surface of the support platform in a welding manner, the right portion of the screw rod is provided with a clamping plate in a sleeved manner, the left side surface of the clamping plate is provided with an arc slot, a first resetting spring is welded on the internalsurface of the arc slot, a pressure plate is welded at the left end of the first resetting spring, the wire-bunching block is arranged at the central portion of the right side surface, the wire-bunching port is arranged at the central portion of the wire-bunching block, the right portion of the inner annular side surface of the wire-bunching port is provided with a groove, a second resetting spring is welded on the right side surface in the groove, a support is welded at the left end of the second resetting spring, and a guide wheel is arranged in the support. Compared with the prior art, thebeneficial effects of the device are that functions of guiding and clamping during installation of the communication cable are realized, and the clamping stability is good.
Owner:郑州拓华仪器有限公司

Annular numerical control automatic hole manufacturing system used for butt joint assembly of airplane body

The invention provides an annular numerical control automatic hole manufacturing system used for butt joint assembly of an airplane body. The annular numerical control automatic hole manufacturing system comprises two annular rail assemblies, at least two four-drive carrying devices moving along the two annular rail assemblies, and automatic hole manufacturing devices installed on the four-drive carrying devices. Each annular guide rail assembly comprises a flexible rail module and a vacuum sucker assembly. Each four-drive carrying device comprises a first double-drive electric control trolley and a second double-drive electric control trolley. Each automatic hole manufacturing device comprises a normal posture adjusting mechanism, a drilling and milling hole manufacturing unit and a pressing and chip removing mechanism. By means of the annular numerical control automatic hole manufacturing system, due to the fact that a certain number of the automatic hole manufacturing devices and a certain number of the four-drive carrying devices are reasonably arranged, the overall rigidity of the annular rail assemblies can be enhanced, and therefore the machining quality of holes is ensured, and the hole machining efficiency can also be obviously improved.
Owner:NANJING COLLEGE OF INFORMATION TECH

Spliced door frame of fireproof door

The invention discloses a spliced door frame of a fireproof door and relates to the field of manufacturing of fireproof doors. The spliced door frame comprises two vertical frames, a horizontal frameand a bottom plate. The horizontal frame comprises a horizontal main frame and a horizontal blocking frame which are integrally formed to constitute a stepped structure; each vertical frame comprisesa vertical main frame and a vertical blocking frame which are integrally formed to constitute a stepped structure; inserting grooves are formed in the two ends of the horizontal main frame and the twoends of the horizontal blocking frame correspondingly, both the upper ends of the two vertical main frames and the upper ends of the two vertical blocking frames extend to form inserting plates, andthe inserting plates and the inserting grooves are in vertical inserted-connection fit; and inserting holes are formed in the lower ends of the two vertical frames correspondingly, the two ends of thebottom horizontally extend to form inserting blocks, and the inserting blocks and the inserting holes are in horizontal inserted-connection fit. Assembling personnel splice and fix the horizontal frame, the vertical frames and the bottom plate, thus assembling operation of the door frame can be achieved without extra welding or riveting operation, the assembling time of the door frame of the fireproof door is further shortened advantageously, and accordingly, the purpose of improving the overall assembling efficiency of the door frame of the fireproof door is achieved.
Owner:上海镜淳门业有限公司

Dust detection apparatus having rapid clamping jig

The invention discloses a dust detection apparatus having a rapid clamping jig. The apparatus comprises a controller, a signal line, a probe box and a metal rod, the metal rod is fixed in a connecting sleeve, the lower end of the metal rod extends out of the lower end of the connecting sleeve, the portion of the metal rod out of the lower end of the connecting sleeve is an induction portion, the surface of the at least the induction portion is coated with a Teflon coating layer, and the upper end of the connecting sleeve is screwed to the bottom of the probe box; and a radial-extending upper annular projection ring is molded on the outer wall of the central portion of the connecting sleeve, a radial-extending lower annular projection ring is molded on the top end surface of a lower connecting sleeve, an elastic ring is clamped between the upper annular projection ring and the lower annular projection ring, and the upper annular projection ring, the elastic ring and the lower annular projection ring are sleeved in the grooves on the inside wall of a left clamping block and a right clamping block of the jig. The lower connecting sleeve is fixed in a connecting hole of the apparatus, and probes can be rapidly connected through the jig, so the apparatus has the advantages of fast clamping speed, convenient installation and convenient dismounting.
Owner:深圳市辉翰科技发展有限公司

Novel power distribution box with convenience in maintenance

The invention discloses a novel power distribution box with convenience in maintenance. The novel power distribution box comprises a power distribution box body. Fixing plates are arranged inside the power distribution box body, an end of each fixing plate is rotationally connected with the inner wall of one side of the power distribution box body by a rotary shaft, the rotary shaft is slidably connected with slide grooves by sliders, the slide grooves are formed in the inner wall of the side of the power distribution box body, heat dissipation holes are formed in the side wall of the other side of the power distribution box body, closing sheets are arranged inside the heat dissipation holes, an end of each closing sheet is connected with a chain by a gear disc in a meshing manner, an end of each gear disc is in transmission connection with a motor by a transmission shaft, and a rainwater sensor is arranged on the top of the power distribution box body. The novel power distribution box has the advantages that the three fixing plates are arranged inside the novel power distribution box, can rotate along the rotary shaft and can outwardly slide along the slide grooves, accordingly, the mounting flexibility of power equipment can be improved, and the novel power distribution box can bring convenience for mounting the power equipment and detaching and maintaining the power equipment in late periods.
Owner:弘毅天承知识产权股份有限公司
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