15results about How to "Prevent loose deformation" patented technology

The invention provides a tunnel primary support process for railway engineering, and relates to the technical field of tunnel primary support. The tunnel primary support process of the railway engineering comprises the following steps: immediately carrying out danger elimination work after tunnel excavation, then carrying out primary concrete spraying operation, carrying out mortar anchor rod or hollow anchor rod construction, laying a reinforcing mesh, carrying out steel frame construction, advanced small pipe construction, anchor rod construction and advanced pipe shed construction, immediately carrying out danger elimination after tunnel excavation, and carrying out primary concrete spraying. The rock mass can be quickly closed, relaxation deformation of the rock mass is prevented, early deformation of surrounding rock is effectively controlled, stability of the surrounding rock is enhanced, safety guarantee is provided for follow-up construction, the reinforcing mesh is laid and firmly connected with the anchor rod and the steel frame, the integrity of the supporting structure is further enhanced, and the impact resistance of the supporting structure is improved. Through auxiliary construction measures such as advanced small guide pipes and advanced pipe sheds, surrounding rock is effectively reinforced, the strength and stability of the surrounding rock are improved, the construction risk is reduced, and it is ensured that tunnel construction smoothly passes through unfavorable geological sections.

The invention discloses an automatic grounding wire assembling and disassembling device, which relates to the technical field of checking and hanging grounding devices and comprises an insulating main rod, a slidable guide unit, a lifting rope, a base anti-winding limiting unit and a tensioning device. The slidable guide unit adjusts the position and height of the grounding wire through sliding to ensure the stability of the grounding wire; the lifting rope is connected with the electricity testing function unit through the pulley system, and it is guaranteed that the operation process is not affected by wind power. The base anti-winding limiting unit is provided with two symmetrically distributed through holes to respectively guide and limit the bottom ends of the grounding wire and the lifting rope, so that mutual winding is effectively avoided; the tensioning device adjusts the tension of the grounding wire through a sliding shaft system and a spring, and ensures that the grounding wire always keeps sufficient tension and is prevented from deforming due to external force interference. The bottom end of the grounding wire forms a broken line type structure, so that tensioning force is applied to the bottom end of the grounding wire, the bottom end of the grounding wire is prevented from swinging due to wind power, the stability and safety of operation are effectively improved, and potential safety hazards caused by wind power influence are eliminated.

The application discloses a machine head for manufacturing soft polytetrafluoroethylene insulated wire and a processing method thereof. The machine head comprises a connecting head in the machine head, a die core is arranged at the top of the connecting head through a die core base, a die sleeve is arranged outside the die core, a center tube is arranged at the bottom center of the connecting head, the machine head comprises two conical bodies with different angles, a bottom conical angle and a top conical angle, the angle of the top conical angle is smaller than that of the bottom conical angle, the wire bearing section of the machine head is horizontal to the die core base, the connecting head comprises two trapezoidal cones with different angles, a bottom conical angle and a top conical angle, the bottom conical angle is the same as the bottom conical angle, and the top conical angle is smaller than the top conical angle, a conductor anti-shaking device is arranged at the bottom of the center tube, the conductor anti-shaking device comprises arc-shaped groove wheels and springs, and the arc-shaped groove wheels are connected through a center rod. The steps are as follows: filling; center tube and die core related component installation; machine head and die sleeve installation; and pushing and extruding. The application can make the insulation layer outside the conductor more compact, and avoid the bending phenomenon of the conductor during processing.

The utility model provides a rolling and pressing device of a crude foil machine. The rolling and pressing device comprises a rack; the winding roller is rotatably arranged on the rack around the axis of the winding roller, and the winding roller is suitable for winding the foil; the angle adjusting mechanism comprises a rotating shaft, the rotating shaft is rotatably arranged on the rack around the axis of the rotating shaft, and the axis of the rotating shaft is parallel to the axis of the winding roller; the first swing arm is connected with the rotating shaft and extends in the radial direction of the rotating shaft; the limiting piece is arranged on the first swing arm, a limiting rail is arranged on the limiting piece, and the extending direction of the limiting rail intersects with the axial direction of the winding roller; the axis of the pressing roller is parallel to the axis of the winding roller, and the two ends of the pressing roller are in sliding connection with the limiting rails. According to the rolling and pressing device of the crude foil machine, the angle of the pressing roller can be adjusted, the pressure of the pressing roller is controlled within a proper range, operation is safe and rapid, and rolling stability can be improved easily.

The utility model provides a relay coil terminal pin aligning device, which comprises a workbench provided with a plurality of vertically arranged guide columns and a jig moving up and down along the guide columns, and the jig is suitable for installing a coil framework; the aligning assembly is suitable for aligning the bent section of the terminal pin; and the clamping assembly is suitable for clamping the unbent part of the terminal pin when the bent section is aligned. Compared with the prior art, the production efficiency is improved, the length of the terminal pin is prevented from being changed or the terminal pin is prevented from being loosened and deformed in the aligning process, and therefore the product quality is guaranteed.

This application discloses an LED display screen, relating to the field of LED display screen technology. The LED display screen includes a cabinet, LED display units, and an arc adjustment mechanism. The cabinet includes a first frame, a second frame, a first hinge structure, and a second hinge structure. The first hinge structure is rotatably connected between the first and second frames at their first ends, and the second hinge structure is rotatably connected between the second ends of the first and second frames. The LED display units are connected to the first and second hinge structures. The arc adjustment mechanism is located between the first and second frames and is used to adjust and fix the arc of the LED display units. This LED display screen solves the problem that current LED displays cannot achieve flexible angle adjustment while ensuring connection strength and angle consistency.

The utility model discloses a novel bend -resistant polyester type halogen -free environmental protection explosion -proof shielding control cable, including cable installation layer, the outside installation of cable installation layer has cable protection composite layer, the cable protection composite layer includes elastomer sheath, the inside installation of elastomer sheath has multipoint position bending monitoring subassembly, and the multipoint position bending monitoring subassembly is by elastic electricity -making band and a plurality of bending monitoring units, and the elastic electricity -making band includes elastic protection zone, and the inboard of elastic protection zone is installed with a plurality of electricity -making silk, and the bending monitoring unit includes installation box, and the inboard fixed mounting of installation box has electricity -making seat, and the upper end surface fixed mounting of electricity -making seat has pressure -sensitive resistance, and the upper end surface installation of pressure -sensitive resistance has the elastic support plate. The utility model discloses through to the cable and carries out the layering cladding, can effectively improve the bending -resistant and stability of cable, can determine the bending position and bending degree simultaneously.

The utility model relates to a double-effect heat exchanger with top and bottom guide rods, which comprises stacked sheets, heat exchange channels are formed among the sheets, a front end plate is arranged at the foremost end of the stacked sheets, a rear end plate is arranged at the rearmost end of the stacked sheets, and the guide rods penetrate among the sheets, the front end plate and the rear end plate. The guide rods penetrate through the inward concave positions of the outer edges of the plate sheets, tensioning guide rods are arranged at the positions, close to the tops and the bottoms, of the surfaces of the front end plate and the rear end plate, the tensioning guide rods penetrate through the front end plate and the rear end plate, and locking bolts are installed at the two ends of each tensioning guide rod. According to the double-effect heat exchanger with the top guide rods and the bottom guide rods, the tensioning guide rods are installed at the tops and the bottoms of the front faces of the front end plate and the rear end plate, the locking bolts are installed on the tensioning guide rods, the tensioning effect similar to that of pull rods can be achieved on the end plates and the plate sheets, and therefore the situation that the double-effect heat exchanger is loosened and deformed after being subjected to lateral pressure is avoided; and therefore, the normal use of the double-effect heat exchanger is ensured.

The utility model provides a kind of communication facilities guy wire protection device, including steel wire rope, the both ends of steel wire rope are bent and form the rope loop part, two rope pressing sleeves are respectively set in the both ends of steel wire rope for making rope loop part keep annular state unchanged, warning pipe is arranged between two rope loop parts, strip plate is arranged along the length direction of warning pipe, two first clamping blocks are respectively set on two rope pressing sleeves, two second clamping blocks are respectively set on two rope pressing sleeves, second clamping block is connected with corresponding first clamping block by two groups of connecting pieces, the both ends of strip plate are respectively inserted in two matched plug-in slots, the utility model has the beneficial effects as follows: improve guy wire construction efficiency.

The utility model relates to the technical field of expressways, in particular to an expressway roadbed structure capable of preventing roadbed softening, which comprises a roadbed layer, the top end of the roadbed layer is fixedly connected with a connecting pipe, the top end of the connecting pipe is fixedly connected with a rectangular ring, the bottom end of the connecting pipe is fixedly connected with a drainage pipe, and the outer surface of the connecting pipe is provided with a plurality of slotted holes. Through the arrangement of the connecting pipe, the rectangular ring, the drainage pipe and the water absorption stone, during use, the rectangular ring is fixed to the top end of the connecting pipe, and the interior of the rectangular ring is arranged in a big-end-up mode, so that water on the road surface can be collected and drained conveniently; the drainage pipe is used for draining rainwater collected by the connecting pipe and can guide a route to be drained outwards, finally, through installation of the water absorption stone, the water absorption stone can absorb internal water vapor, internal moisture is prevented from forming a water source and causing the internal structure to be soft, the pavement can be prevented from being soft and deformed after the water is drained, and therefore the effect of preventing the roadbed from being softened is achieved.

The utility model relates to the technical field of laying of metal conduits, and discloses a flexible traction device for laying of metal conduits, which comprises a support, a hollow column is fixedly mounted on the upper surface of the support, and a laying auxiliary mechanism is arranged on the hollow column. The laying auxiliary mechanism comprises a metal pipe storage disc, a stand column, a fixing plate, a first lead screw, a first bevel gear, a second bevel gear, a fixing roller, a rotary knob, an extension plate, a first limiting wheel, a second limiting wheel, a motor, a second lead screw, a moving ring, a supporting rod, a clamping plate, a first sliding groove, a second sliding groove, a spring and a T-shaped clamping plate. The motor drives the second lead screw to rotate to drive the moving ring, the supporting rod and the clamping plate to cooperatively operate, so that the clamping plate is tightly attached to the inner surface of the metal guide pipe and is matched with the spring and the T-shaped clamping plate to conduct downward clamping, a multi-dimensional fixing mechanism is formed, the metal guide pipe is effectively prevented from loosening and deforming in the unwinding and laying process, and the continuity and stability of laying operation are ensured.

The utility model discloses an atomizing core with a plane wall part, which comprises an outer sleeve, at least one surface of the wall part of the outer sleeve is a flat-plate-shaped plane wall part, the plane wall part is provided with a liquid inlet through hole, the inner wall of the outer sleeve is fitted and sleeved with a hollow atomizing bracket, and a heating mesh parallel to the plane wall part is arranged in the atomizing bracket. Electrode pins are arranged on the edges of the two sides of the heating mesh, penetrate through one end of the atomization support and extend out of one end of the outer sleeve, at least one liquid guide layer is further arranged in the atomization support, the liquid guide layer is tightly attached to the position between the heating mesh and the plane wall part, and the liquid inlet through hole is directly communicated to the surface of the liquid guide layer. An atomization cavity is formed in the side, not in contact with the liquid guide layer, of the heating mesh in the atomization support and communicated with the two ends of the outer sleeve respectively, one end of the outer sleeve forms an air inlet end, and the other end of the outer sleeve forms a mist outlet end. The utility model has the beneficial effects that the flat rectangular heating mesh enables the atomization channel to have a larger cross sectional area, so that the atomization amount is larger, and the atomization efficiency is higher.

The utility model relates to GX53 lamp holder technical field discloses a kind of flat symmetrical buckle type GX53 lamp holder structure, including two first assembling shell and second assembling shell, a first assembling shell and a second assembling shell are a group, and are assembled by clamping;Wherein, annular assembling groove is set on one first assembling shell, and the other first assembling shell is protruded with the annular assembling block matched with the shape of assembling groove;When two first assembling shells are pasted, the cooperation surface of assembling block and assembling groove exists predetermined radial interference amount, forms self-locking type tight fit;Through the interference fit design of annular assembling groove and annular assembling block, self-locking type tight fit is formed, the axial symmetry positioning of two first assembling shells is realized;The overall rigidity of pre-tightening force enhancement structure generated by interference fit avoids loosening deformation due to external force impact or long-term use, to improve the stability and service life of lamp holder structure.