50results about How to "Guaranteed horizontal accuracy" patented technology

The invention relates to the field of fine flattening of lands, in particular to a GNSS (global navigation satellite system) based intelligent flat shovel control system and method and a flat shovel device applying the control system. The system comprises a GNSS positioning unit and a height adjusting unit, wherein the GNSS positioning unit comprises a GNSS base station and a GNSS moving station. The GNSS base station is used for receiving GNSS signals and calculating and transmitting differential signals. The GNSS moving station is used for receiving the differential signals from the GNSS base station and calculating and transmitting spatial information. The height adjusting unit comprises a controller, an electro-hydraulic directional control valve and a hydraulic cylinder. The controller is used for receiving the spatial information output by the GNSS moving station and transmitting action commands to the electro-hydraulic directional control valve connected with the hydraulic cylinder. By the GNSS based intelligent flat shovel control system and method, the problems about limited operation range, low operation efficiency, failure in accurate operation on slopes, large error in large-range operation, poor environmental adaptability and the like of laser control on the flat shovel device are solved.

The invention discloses a pedestrian protecting vehicle scriber used for a collision test, which comprises a movable base arranged in the Y direction, a horizontal moving rack, a longitudinal moving rod and a scribing rod, wherein the movable base is provided with a self-arranged leveling and fixing device; the horizontal moving rack and the movable base are in Y-direction sliding fit; a Z-direction extending vertical strut is fixed on the horizontal moving rack; the longitudinal moving rod is horizontally arranged on the vertical strut along the X direction; the longitudinal moving rod can horizontally slide along the X direction and the Z direction on the vertical strut and is locked and positioned; the scribing rod is arranged on one end of the longitudinal moving rod by a universal joint; and a space angle between the scribing rod and the longitudinal moving rod can be regulated at will. The pedestrian protecting vehicle scriber has the characteristics of low working intensity, high scribing efficiency and high scribing precision, is convenient and simple to operate, is convenient to move and saves space, can be made of belt trough aluminium profile, aluminium alloy plates and few steel materials to guarantee integral strength and have portability. The pedestrian protecting vehicle scriber is suitable for various vehicle collision test processes to serve as an auxiliary tool to carry out pedestrian protecting scribing operation.

Provided is a glass location vacuum pad assembly and use method. A glass location vacuum pad is formed by a pad body, an upper vacuum cavity, a lower vacuum cavity, an upper vacuum channel, a lower vacuum channel, an upper connector, a lower connector, a first annular sealing groove, a second annular sealing groove and O-shaped sealing ring pads. The pad body is cast to be of an I-shaped structure, the cylindrical upper vacuum cavity is processed in the middle of the upper portion of the pad body, the cylindrical lower vacuum cavity is processed in the middle of the lower portion, at least two annular sealing grooves are formed in the upper plane and the lower plane of the pad body, and the O-shaped sealing ring pads are installed in the annular sealing grooves correspondingly. The glass location vacuum pad is simple and efficient in structure design, ideal in location and attraction effect, convenient to manufacture, simple in operation, capable of reducing labor intensity of operators, low in manufacture cost, capable of saving rubber raw materials, easy to operate, convenient to maintain, flexible in operation and suitable for popularization and use.

The invention relates to a ceramic hole processing device, in particular to an engineering-ceramic complex-frequency ultrasonic processing device and solves problems that an existing processing device is poor in processing quality and efficiency, high in cost and limited in processing shape. The engineering-ceramic complex-frequency ultrasonic processing device comprises a frame, an amplitude-change pole is arranged on the frame, a transducer connected with the amplitude-change pole is arranged at the lower end of the same, a stepped connecting block with the upper diameter larger than the lower diameter and connected with the amplitude-change pole is arranged at the upper end of the same, the stepped connecting block is sleeved with a free-quality casing located between the stepped surface of the stepped connecting block and the upper end face of the amplitude-change pole, a drill is connected to the upper end of the stepped connecting block, a workpiece worktable is arranged above the drill, and a guide rail sliding vertically is arranged on one side of the workpiece worktable. The engineering-ceramic complex-frequency ultrasonic processing device is reasonable and reliable in structural design, low in energy consumption, simple in structure and light in weight, processing precision and processing efficiency are greatly improved, few movement parts are involved, rotational motion is omitted, keeping of rotation torque is not needed, and the device can be used for environments under high temperature, low temperature or vacuum and the like.

The invention relates to the LCD (liquid crystal display) TV bracket technical field, specifically relates to an adjustable LCD TV bracket, comprising a baseboard, a connecting arm, a panel, and a substrate, wherein said connecting arm is hinged with the baseboard in one end and hinged with the substrate in the other end. It is characterized in that the upper part of the panel is provided with a connecting mechanism and the lower part of the panel is hinged with the lower part of the substrate. The upper part of the substrate is equipped with a locking mechanism, and the connecting mechanism is connected with the locking mechanism. The invention is compact in the structure, rational in the design, simple in installation and nice in the use effect. An upper adjusting block and a lower adjusting block perform rotational adjustment by taking a connecting plate as the center so as to correct the baseboard and bracket on the wall by means of connecting deformation to guarantee the horizontal accuracy of an LCD TV. Upper adjustment and lower adjustment by taking the bottom edges of an LCD TV as the axis are increased on the basis of the connecting arm achieving LCD TV left rotation and right rotation to further perfect the bracket function expansion for multi-view use of an LCD TV.

The invention relates to the technical field of laser cutting equipment, in particular to a large-breadth laser cutting machine which comprises a machine tool, and a material supporting mechanism, a gantry mechanism, a cutting mechanism, position adjusting mechanisms, a heat insulation mechanism and a dust removal mechanism respectively arranged on the machine tool. The rack comprises a main crossbeam, a main longitudinal beam, a first boundary beam and a second boundary beam; the material supporting mechanism comprises a first material frame and a second material frame; the gantry mechanismcomprises a first rack, a gantry, a first motor, a second rack and a guide rail; the cutting mechanism comprises a moving frame, a second motor and a laser cutting machine, the moving frame is slidably connected with the guide rail, the second motor is arranged on the moving frame, the second motor is connected with the second rack through a gear, and the laser cutting machine is installed on themoving frame; and the two sets of position adjusting mechanisms are symmetrically arranged on the first boundary beam and the second boundary beam. The large-breadth laser cutting machine provided bythe invention can adapt to the cutting machining of large-breadth plates, and is high in precision and good in effect.

The invention discloses an installation method of a special anchor rod for pre-installing a temporary wall-hanging air and water pipeline during shaft construction. The installation method comprises the following steps: (1) welding a combined anchor rod seat on the ground and screwing an anchor rod seat fixing sleeve in the combined anchor rod seat; (2) aligning and positioning a shaft metal template vertical mould; (3) trepanning a metal template; (4) putting the combined anchor rod seat through the holes formed in the metal template; (5) casting concrete on the metal template; (6) screwing out the anchor rod seat fixing sleeve from the combined anchor rod seat after cast shaft concrete is solidified; (7) demolding the metal template; (8) screwing an anchor rod seat suspension beam in the combined anchor rod seat.

The invention discloses a novel firework support. The novel firework support comprises a support body made of metal. The support body comprises a base and a firework barrel fixed to the base. The cross section of the firework barrel is square. Strip type level gauges which are parallel to the bottom face of the base are arranged on the two adjacent faces of the firework barrel. Each strip type level gauge is connected with the firework barrel through a magnet arranged on the strip type level gauge. Supporting plates used for supporting the strip type level gauges are welded to the outer walls of the firework barrel and are parallel to the bottom face of the base. According to the novel firework support, the horizontal accuracy of the novel firework support is more guaranteed through the arrangement of the strip type level gauges, so the novel firework support can be horizontally placed, surrounding buildings will not be damaged in the process of setting off a firework which is placed in the firework barrel.

The invention relates to the technical field of ship manufacturing, in particular to a refrigeration house goods shelf foundation and an installing method thereof. The refrigeration house goods shelffoundation comprises multiple goods shelf bases arranged at intervals, the upper surfaces of the goods shelf bases are located in the same horizontal plane, and each goods shelf base comprises overlapping racks and supporting assemblies, wherein the overlapping racks are provided with containing channels; the supporting assemblies are arranged in the containing channels and connected with the sidewalls of the containing channels, and the upper surfaces of the supporting assemblies are located in the same horizontal plane. The installing method of the refrigeration house goods shelf foundationincludes the steps that an installing line is marked out; multiple mark poles are erected, a horizontal height line is marked on each mark pole, and multiple horizontal height lines are located in the horizontal plane; according to the position of the installing line, the overlapping racks are arranged at preset positions and fixed; according to the horizontal height lines on the mark poles, thepositions of the supporting assemblies are determined, and the supporting assemblies are fixed to the overlapping racks.

The invention discloses a space constant-temperature large-size printing platform 3D printing device. The space constant-temperature large-size printing platform 3D printing device comprises a devicerack, a heat preservation layer is arranged on the inner side of the rack, a front door is arranged on the front face of the rack, a forming space is formed by the heat preservation layer and a cavitydefined by the interior of the front door, a printing platform assembly, a spray head assembly and a hot air double-circulation space heating assembly are arranged in the forming space, the printingplatform assembly is arranged at the bottom in the forming space, an air inlet of the hot air double-circulation space heating assembly is formed in the top of the forming space, and an air outlet ofthe hot air double-circulation space heating assembly is formed under the printing platform assembly; and a hot bed of the printing platform assembly is formed by splicing a plurality of hot bed units, and each hot bed unit is provided with a horizontal adjusting assembly and a locking assembly. According to the space constant-temperature large-size printing platform 3D printing device, stress deformation of a large-size hot bed during heating can be effectively avoided, hot air blown out of the forming space is diffused all around, the whole forming space is evenly filled with the hot air, and the forming precision and the surface quality of products are effectively improved.

The invention relates to a welding process for a tower door frame. The welding process comprises the following specific steps of S1, coiling a tower drum; S2, forming a hole in the tower drum; S3, beveling a door frame hole; S4, positioning a door frame; S5, performing spot welding positioning; S6, preheating a joint; S7, selecting a welding wire; and S8, welding an inner bevel and an outer bevel.The welding process has the advantages that a second cone part is arranged on the outer edge of the door frame, so that the horizontal accuracy and positioning-embedding size of the door frame embedded in the tower drum are ensured; transverse concentration of the welding stress is avoided; and the reduction of the stress level and stress balance are ensured.

The invention discloses a large-span equipment frame foundation leveling and assembling construction device and method, and belongs to the technical field of frame assembling. The large-span equipment frame foundation leveling and assembling construction device comprises base anchor positioners, digging holes and square pipe connecting frames, wherein the base anchor positioners are arranged in a bent octagon manner; and the digging holes are formed in the base anchor positioners, and the square pipe connecting frames are detachably connected to the digging holes and used for connecting and allowing an equipment frame to be arranged. According to the large-span equipment frame foundation leveling and assembling construction device and method, the plurality of base anchor positioners are pre-buried on the ground, and the square pipe connecting frames used for adjusting the levelness are welded to the base anchor positioners, so that leveling on the ground, leveling and assembling from points to faces are achieved, the horizontal precision of the large-span equipment frame can be effectively guaranteed, errors are reduced, then the construction period is shortened, and material consumption is reduced.

The invention discloses a square silencer shield and connecting bracket welding tool comprising a pedestal, a side support and a n-shaped top press seat; a guide rail support and a control support are arranged on the pedestal; the guide rail support and the side support are symmetrically arranged on the pedestal; ends of two vertical edges of the n-shaped top press seat are respectively provided with a vertical positioning hole; a vertical positioning insert bar is arranged in the vertical positioning hole; a transverse guide rail insert bar is arranged on the guide rail support; a transverse control pusher is arranged on the control support; the front end of a transverse push rod of the transverse control pusher is provided with a thread fixed screw rod; the side face of the side support is provided with a press positioning crossbar. The square silencer shield and connecting bracket welding tool is simple in structure, strong in positioning reliability, can effectively control silencer shield offset, thus improving welding precision and efficiency, ensuring the connecting bracket horizontal precision and symmetrical precision, and improving welding efficiency and quality; the square silencer shield and connecting bracket welding tool is good in applicability and strong in practicality.

The invention relates to the technical field of road and bridge construction, in particular to a super-huge 0 # block cast-in-place box girder bracket structure and a mounting method thereof. 2, pier body embedded parts are installed; 3, the brackets are assembled according to the assembling sequence; 4, the steel cable is tensioned; 5, a formwork is installed; step 6, carrying out bracket prepressing detection; step 7, 0 # box girder construction; compared with a traditional triangular bracket, the bridge bracket structure does not affect the navigation and passing requirements of the lower portion of a bridge span; the structure is more stable, the wind load can be resisted, the construction safety risk is reduced while the structure safety is guaranteed, and the device can well adapt to the construction of various large 0 # block cast-in-place box girders and is safe, reliable and convenient to construct. When the bracket is installed, a large number of tailor-welding procedures are not needed, the assembly efficiency is high, rapid installation and disassembly can be achieved, the overall construction period can be effectively shortened, the turnover utilization rate of materials is increased, and the bracket has wide application and popularization value.