44results about How to "Small headroom" patented technology

The invention discloses a construction method for renovating tunnel lining water seeping damage. The method solves the problem of sealing and blocking quality control of a groove passage and the connection with the lining at two sides in the traditional tunnel lining water seeping damage control process. According to the method, firstly, a trapezoidal groove passage in the annular direction of the tunnel is formed in a water seeping position on the tunnel lining, a guide and discharge pipeline and a reinforcing mesh are arranged in the trapezoidal groove passage, expansion screw bolts used for fixing the reinforcing mesh are arranged on the two side walls of the trapezoidal groove passage, a plurality of lining plates are arranged, sealed and covered on the groove passage, in addition, the concrete is respectively filled into the groove passage in a sequence of the side wall, the arch waist and the arch top, and is compactly vibrated and beaten, and the lining template is removed after the concrete intensity meets the requirements. The method adopting the reinforcing mesh and the lining template for cooperated fixation is adopted, the connection between the filling materials in the groove passage and the lining at the two sides is optimized, the firmness of the filling materials is enhanced, and the falling of the filling materials is effectively prevented. The construction method has the advantage that under the condition of meeting the construction safety, the operation safety of the existing railway is also ensured.

The invention discloses a loading system for a full-automatic numerical control laser pipe cutting machine. The loading system comprises a pipe frame, a pipe fitting carrying module and a pipe cuttingconveying table arranged in sequence; multiple metal pipes to be cut are arranged on the pipe frame in sequence; and the pipe fitting carrying module is operated to transfer the metal pipes to be cutfrom the pipe frame to arrange on the pipe cutting conveying table end to end in sequence. The loading system for the full-automatic numerical control laser pipe cutting machine can orderly load themetal pipes, arranged in sequence, on the cutting conveying table in sequence by the pipe fitting carrying module for cutting, realizes synchronous implementation of loading and cutting of the metal pipes, improves the cutting efficiency, and saves both time and power.

A dual-antenna integrated broadband 5G MIMO terminal antenna includes a metal floor, a metal frame, and N integrated dual-antenna assemblies. N floor slots are symmetrically arranged in the edge of the metal floor, and N is an integer from 1 to 4. The four sides of the metal frame are closed and connected, the bottom of the metal frame is connected with the edge of the metal floor, and the metal frame is provided with N frame slots having a one-to-one correspondence with the floor slots. The N integrated dual-antenna assemblies are distributed in the N floor slots respectively, and the centerof each integrated dual-antenna assembly corresponds to one frame slot. Each integrated dual-antenna assembly includes first and second feeding branches and an inductive decoupling assembly, and the inductive decoupling assembly is a lumped inductor or a bent metal branch connected across the two ends of the corresponding frame slot. The dual-antenna integrated broadband 5G MIMO terminal antenna has the advantages of small size, low headspace, broad band, high efficiency, compatibility with a metal frame, fewer frame slots and dual-antenna integration, and is suitable for various small mobileterminals represented by mobile phones.

The invention relates to a coal mining technology, and discloses a fully mechanized mining recovery technology with a large mining height and a complex thick coal seam with a large dip angle structure. This process retains the uncut section to feed the knife, and through the supporting effect of the uncut section, the empty roof area is reduced to prevent the occurrence of roof fall accidents. The combination of cutting sections can further improve the stability of the entire working face, and ensure the unimpeded pedestrian passage of the end bracket and tail frame; moving the hydraulic support twice can solve the problem that the hydraulic support cannot be pushed to a cutting depth at one time, and ensure that the scraper conveyor can Push it in place to maintain the safe operation of the equipment.

The invention discloses a novel bluetooth / WLAN antenna and an intelligent device, wherein, the novel bluetooth / WLAN antenna includes a PCB board and an antenna assembly, the PCB board is provided with an antenna clear area, and the antenna clear area includes a set The first clearance area on the upper surface of the PCB board and the second clearance area arranged on the lower surface of the PCB board; the antenna assembly includes a first radiator, a second radiator and a third radiator, the first radiator and The second radiator is arranged in the first clearance area, and a feeder is arranged on the first radiator; the third radiator is arranged in the second clearance area, and the second radiator and the first radiator The coupling forms a first resonance branch, and the coupling of the second radiator and the third radiator forms a second resonance branch. The antenna of the invention has the advantages of small occupation area, high design flexibility, high radiation impedance and good omnidirectionality of the antenna.

The invention belongs to the cell phone antenna technology field, and relates to a general compact multi-frequency band cell phone antenna adopting a radio frequency switch. The antenna comprises a grounding plate, a feeding point, a radiation paster, a feeding point part matching, an end part grounding point, an end part grounding point radio frequency switch, an end part grounding point matching, a middle grounding point, and a middle grounding point radio frequency switch. The feeding point is parallely connected with an inductor, and the radiation paster is disposed in a cavity having a rectangular long strip-shaped structure of a side wall of a cell phone housing, and the space of the radiation paster, which is 3mm away from the grounding plate, is the antenna clearance zone. The end part grounding point and the middle grounding point are respectively connected with a radio frequency switch having a single-pole four-throw structure, and branches of the radio frequency switch are connected with inductance structures having different inductance values, and the inductance structures are respectively connected with the grounding plate. The radio frequency switch-type compact multi-frequency band cell phone antenna has advantages of reasonable overall structural design, cell phone space saving, wide frequency band, high efficiency, strong universality, good anti-interference capability, and application environment friendly performance.

The invention discloses a construction method for a prefabricated perforated type filling module of a ribbed cast-in-place concrete floor slab. The method comprises the following steps of: constructing a template support frame body; arranging a bottom template of the floor slab; binding two-way bottom-row reinforcements on the bottom template; binding bottom-row transverse ribbed beam reinforcements and bottom-row longitudinal ribbed beam reinforcements of ribbed beams on the two-way bottom-row reinforcements, and binding top-row transverse ribbed beam reinforcements and top-row longitudinal ribbed beam reinforcements on the upper parts of the bottom-row transverse ribbed beam reinforcements and the bottom-row longitudinal ribbed beam reinforcements, thereby forming a plurality of squares; placing two high cushion blocks in the first of every two squares; arranging longitudinal bracket reinforcements in each row of squares; arranging a prefabricated filling module in each square; arranging longitudinal anti-floating reinforcements on each prefabricated filling module; binding two-way top-row reinforcements of the floor slab on the longitudinal anti-floating reinforcements; and pouring floor slab concrete. The method is firm in structure, safe and reliable, anti-floating measures are effective, and the self weight of the floor slab is reduced.

The invention discloses a mobile phone antenna and a mobile phone. The mobile phone antenna includes: a first antenna branch arranged on a frame of the mobile phone and extending from a lateral side at the bottom of the frame to a first longitudinal side. The second antenna branch is arranged on the frame of the mobile phone opposite to the first antenna, and extends from the lateral side at the bottom of the frame to the second longitudinal side. A gap is formed between the first antenna branch and the second antenna branch, and both the first antenna branch and the second antenna branch are continuous conductive structures. The mobile phone antenna provided by the invention reduces the cost and improves the communication performance.

The invention discloses an antenna system based on a smart phone with an all metal back cover. The antenna system comprises a metal back cover and an integrated PCB, wherein the upper edge and the lower edge of the metal back cover are each provided with a C-shaped clearance, the upper end of the metal back cover form a C-shaped radiation main body due to a part separated by the clearance, the integrated PCB is provided with a plurality of coupling units coupled with the C-shaped radiation main body, and the clearance is provided with a connecting piece communicating the C-shaped radiation main body with the integrated PCB. Due to the all metal back cover structure, the antenna system has an excellent radiation performance, and the radiation performance of each frequency of the antenna is improved while the metal back cover is more integral.

The invention relates to a translational door, comprising a plurality of door row assemblies, a guide assembly is arranged between two adjacent door row assemblies, and the guide assembly is slidingly connected with the two adjacent door row assemblies, so as to realize the The dislocation sliding of the two door row assemblies, the door row assembly is provided with a door opening limit and a door closing limit for limiting the guide assembly. When all the door row assemblies are fully pulled apart, the guide assembly abuts against the corresponding door closing limits of the two adjacent door row assemblies, and the length of all the door row assemblies when fully pulled is greater than or equal to the length of all the door row assemblies sum; when all the door row assemblies are fully folded, the guide assembly abuts against the corresponding door opening limits of the two adjacent door row assemblies, and the length of all the door row assemblies is equal to the length of the longest door row assembly length. Compared with the prior art, the occupied space of the door row assembly is reduced, and the utilization rate of the door opening is improved.

The invention relates to a method for determining the total deceleration value (b) which can be achieved by actuating the wheel brakes of a commercial vehicle (6) or a vehicle combination (24) having a plurality of axles (7, 8). max , b min )Methods. The invention also relates to a braking device for carrying out the method and a commercial vehicle or a vehicle combination having such a braking device for carrying out the method. In order to determine the currently achievable total deceleration value (b max , b min ), according to the invention, in order to implement the deceleration request (20) in the partial braking (27), the braking unit (1, 2, 3, 4) unevenly distributed braking force (F 1 , F 2 , F 3 , F 4 ) to distribute the braking force (26), wherein one of the braking units (1, 2, 3, 4) is respectively selected and applied by the selected braking unit (29) and applied by the other braking units (1, 3, 4) Compared with larger braking force (F 2 ), wherein the current deceleration b of the commercial vehicle (6) or vehicle combination (24) is measured or known and used as the partial deceleration value (b 1 , b 2 , b 3 , b 4 ) are each assigned to the selected brake unit (29) and saved. The total deceleration value that will be achieved (b min , b max ) is determined as the partial deceleration value (b) of all braking units (1, 2, 3, 4) 1 , b 2 , b 3 , b 4 ) sum (31).

The invention discloses a full-load self-moving anti-falling and anti-slip hydraulic support, which comprises a main top beam (1), an auxiliary top beam (2), a top beam connecting device (3), a main base (4), an auxiliary base (5), Upright column (6), horizontal connecting device (7) and moving jack (8), the horizontal connecting device includes an upper connecting mechanism (71) and a lower connecting mechanism (72), and the two auxiliary top beams are fixedly connected through the upper connecting mechanism , the two auxiliary bases are fixedly connected through the lower connecting mechanism; at least two pieces of moving jacks are provided, one end of one piece is hinged to the main top beam, the other end is hinged to the upper connecting mechanism, one end of the other piece is hinged to the main base, and the other end Hinged to the lower connection mechanism. The support area of ​​the bottom plate of the self-moving anti-fall and anti-slip hydraulic support with full load is large, and the support effect is good; when the frame is moved, the auxiliary top beam and the auxiliary base move synchronously, which is not easy to deviate, and the overall stability is good; The damage of the roof is small, and the integrity of the roof can be better maintained.

The invention discloses a dual-band WiFi antenna system for a wireless router, which includes a router housing, a PCB board is placed inside the wireless router housing, and a first antenna assembly, a second antenna assembly and a second antenna assembly are fixed on the PCB board. Three antenna components, the first antenna component, the second antenna component and the third antenna component are located at the same end of the PCB, and the second antenna component is located between the first antenna component and the third antenna component. The invention has better self-isolation characteristics, meets the requirements of isolation conditions between antennas and gain flatness, and provides bending parts on the long antennas of the antenna assembly, which can reduce the gap between the antennas and is suitable for small-sized routers.