80results about How to "Avoid the phenomenon of destruction" patented technology

The electric detonator initiator includes bridge filaments, pin wires, span determinator and sealing plug. The pin wires are integral with the base board for the bridge filaments, and each piece of pin wires is formed with one section of pin wire from the sealing plug to the bridge filament welding end and is variable flat cross section structure. The pin wires have their flat parts inside sealing plug, span determinator and welding end. Both the sealing plug and the span determinator are linked structure with several parts. The present invention has simple production process, and the electric detonator initiator has small dispersion of bridge filaments and high side rigidity.

The invention discloses a multifunctional air purifier. The multifunctional air purifier comprises a box body, a sleeve box and a lifting box; an inner cavity of the box body is provided with an air intake fan, a disinfection plate is arranged on the left side of an inner cavity of the sleeve box, and an ultraviolet disinfection lamp is fixedly connected to the top of the inner cavity of the sleeve box through a support. Accordingly, by means of the air intake fan, air enters the inner cavity of the box body, and the air is disinfected and filtered through the disinfection plate; the ultraviolet disinfection lamp and an activated carbon absorption layer, the air becomes fresh and nontoxic, and an inner cavity of a water tank is filled with water; by means of a water pump, water flows intoan inner cavity of a humidifier for humidification, and the air is humidified through output of branched pipes; when the air purifier is moved, the bottom of the lifting box can be exposed through rolling wheels to move the air purifier. Therefore, the air purifier has the advantages of being capable of disinfecting and humidifying the air and moving the air purifier conveniently, health of a useris guaranteed, and the user can use the air purifier conveniently.

The present invention discloses a preparation method of a high-temperature composite sample and belongs to the technical field of composite materials. The preparation method of the high temperature composite material comprises the steps of: designing and processing a mold according to the sample structure; pre-forming a reinforcement sheet on the lower surface of the mold, wherein the reinforcement sheet on the lower surface is made of the same material as the sample; pre-forming a test board; pre-forming the reinforcement sheet on the upper surface of the mold, wherein the reinforcement sheet on the upper surface is made of the same material as the sample; conducting RTM forming on the whole test board to obtain high-temperature composite material sample; and processing the on test board. The reinforcement sheets and the body do not have adhesive secondary curing interface, the adhesive surface shear strength is consistent with test piece body material layer, so as to avoid the destruction of the adhesive surface in the test process.

The invention discloses a method for preparing a PA66 grafted carbon nano-tube. The method comprises the following steps: aminating the surface of a carbon nano-tube by adopting an ammonia plasma technology to obtain CNT-NH2; (2) modifying the surface of the CNT-NH2 by utilizing dialdehyde compounds to formylate the CNT surface to obtain CNT-CHO; and reacting -NH2 on the PA66 surface with the formylated CNT-CHO to obtain the PA66 grafted CNT (PA66-CNT). The method for functionalizing the CNT surface is relatively simple, and can be used for keeping the completeness of the CNT body structure and solving the problem that CNT is easily agglomerated in the PA66 matrix, so that the crystallization performance of the PA66 is effectively improved, and the antistatic performance of the PA66 is remarkably improved. The method has the advantages of low cost, short preparation period, mild reaction conditions, environmental friendliness and the like, and has relatively wide application prospects.

A shielding tail cover comprises a tail cover shell, a lining, a limiting sleeve, a crimping cylinder, a wire clamp and a screw, wherein a first step hole is formed in the tail cover shell, the lining is a tubular body internally provided with a step hole and externally provided with a cylinder, the limiting sleeve is a cylindrical body in which a plurality of wire core holes are formed, the lining is inserted into the wire core holes of the limiting sleeve, the limiting sleeve is arranged in the first step hole of the shell, the crimping cylinder sleeves an outer side of the lining, and two semi-circular arches of the wire clamp are buckled outside the crimping cylinder and are fastened by the screw. With a structure of arranging the lining in the shell, the problem of cable grounding is solved; the limiting sleeve is used for limiting axial movement of a cable; and with the adoption of the structure of the crimping cylinder and the wire clamp, the cable and the shell are fixed in a radial direction of the cable, so that the cable is stable and firm in connection, the phenomena that the cable is damaged and the shielding layer is damaged are prevented, and the shielding tail cover has the advantages of good shielding performance and high electromagnetic interference prevention capability.

The invention discloses a gob-side crossheading advanced grouting reinforcement method for a high-ground-pressure soft-roof soft-coal and soft-floor coal seam. The method comprises the following steps of determining a reinforcement range: determining a grouting reinforcement operation and a gob-side crossheading grouting reinforcement range thereof when roadway mine pressure appearance characteristics and similar condition roadway deformation characteristics conform to a preset range, wherein the gob-side crossheading grouting reinforcement range comprises the reinforcement length and the reinforcement part; selecting a reinforcement material: performing the reinforcement operation by using ordinary Portland cement, a high polymer material or a novel inorganic reinforcing material in a way of aiming at a specific reinforcement part; designing a reinforcement scheme: determining the grouting opportunity, and designing a reinforcement mode and hole arrangement parameters; and performing construction according to a reasonable process. A traditional supporting method for the gob-side crossheading of the high-ground-pressure soft-roof soft-coal and soft-floor coal seam is changed, the roadway maintenance is changed from traditional post-repair to advanced active reinforcement, supporting stability of the gob-side crossheading is guaranteed, and phenomena of repair while excavating and repair while mining are avoided.

The invention belongs to the technical field of testing, and relates to a hollow-structure high-cycle fatigue vibration testing device and method. The testing device comprises a testing device base, a simple supported end support plate, a simple supported end chuck bearing, a simple supported end chuck, a hinged support end chuck, a hinged support end chuck shaft, a rocker, a rocker bearing and a hinged support end support. By means of the clamping scheme of simply supporting at one end and hinged supporting at the other end, the maximum stress area of a tested piece is far away from the clamping position. The tested piece with the equal cross section and the relatively simple appearance of the cross sections can be adopted in the testing device, the stress of the checked part of the tested piece is distributed relatively simply, and the subsequent theoretical analysis is facilitated. According to the appearance scheme of the hollow-structure tested piece and the corresponding high-cycle fatigue vibration testing device, the hollow-structure high-cycle vibration tested piece is simple in structure and even in appearance. The checked part of the tested piece is far away from the clamping end, the stress state of the tested piece is relatively simple and even, and the loading process of a vibration platform is simple.

The invention discloses a combined type antenna beautifying cover with a hollow sandwiched structure. The combined type antenna beautifying cover comprises more than two antenna cover assemblies, wherein each antenna cover assembly comprises a hollow sandwiched wave-transmission region and solid glass steel connecting regions arranged at the two ends of the hollow sandwiched wave-transmission region; special-shaped inserting slot connecting pieces are arranged on the solid glass steel connecting regions; all antenna cover assemblies are connected in sequence through the special-shaped inserting slot connecting pieces to form a closed structure; and the hollow sandwiched wave-transmission region consists of a hollow sandwiched fabric layer and reinforced fabric layers which are compounded on the upper and lower surfaces of the hollow sandwiched fabric layer. The antenna beautifying cover provided by the invention has excellent broadband wave-transmission property and rapid combination function; delamination resistance and other mechanical properties of the antenna cover are ensured; a phenomenon of damage of the antenna cover caused by wind load in the use process can be avoided; the antenna beautifying cover has excellent characteristics of low loss, high wave transmissivity and other electrical properties, and light weight and high strength; and meanwhile, the problem that rapid connection of the existing antenna cover with a hollow sandwiched structure cannot be realized in the prior art is solved.

The invention relates to the field of gardening tools, in particular to a combined type flowerpot storage platform. The combined type flowerpot storage platform comprises a base and a clamping mechanism, wherein a storage groove used for storing flowerpots is formed in the center of the base, the storage groove is connected with sliding chutes, the sliding chutes comprise a left sliding chute and a right sliding chute, the clamping mechanism is located on the base, the sliding chutes are slidably connected with the clamping mechanism, the clamping mechanism comprises clamping blocks and threaded rods, the clamping blocks comprise a left clamping block and a right clamping block, the threaded rods comprise a left threaded rod and a right threaded rod, the left threaded rod is hinged into the left sliding chute and is in threaded connection with the left clamping block, and the right threaded rod is hinged into the right sliding chute and is in threaded connection with the right clamping block. By means of the combined type flowerpot storage platform, the problem that in the existing gardening process, the flowerpots are easy to topple due to the fact that no fixing device exists, so that the landscape is destroyed is solved, and the combined type flowerpot storage platform is used for fixing the flowerpots.

The invention discloses a structure with prestress assembly type concrete frame-energy consumption support reinforcement arranged outside an existing structure. The structure comprises an externally added frame-energy consumption support structure fixed to an original structure to be reinforced. The external added frame-energy consumption support structure comprises precast beams, precast columns,and precast supports; the precast supports are prefabricated in a manner that concrete is poured to a built-in low-yield-point energy consumption steel plate, reserved connecting parts for connectingare formed in the precast beams, the precast columns and the precast supports, the precast beams and the precast columns are fixedly connected, concrete is post casted on the connecting joints, penetrating prestress ribs are arranged in the precast columns which are fixedly connected in sequence, and two ends of the prestress ribs are anchored. The externally added frame is composed of multiple externally added frame units, and the precast supports are arranged in the externally added frame units. Under the condition of not affecting use of the original structure to be reinforced, the construction efficiency and the reinforcing quality are greatly improved.

The invention discloses a cutting device for plastic processing, comprising a base, the top of the base is fixedly connected with a box body, both sides of the top of the base are fixedly connected with a first electric lift-and-retract rod, and the first electric lift-and-retract rod The top of the box is fixedly connected with a horizontal plate, the inner cavity of the box body is provided with a first motor, the output end of the first motor is fixedly connected with a threaded rod, and the right end of the threaded rod is movably connected with the right side of the box inner cavity through a bearing. In the present invention, the height of the cutting device can be adjusted by opening the box body to lift, and the cutting object can be clamped through the cooperation of the casing, the spring and the fixing plate, which is convenient for cutting the cutting object. Through the first motor, The cooperative use of the threaded rod, the threaded sleeve and the support plate can move the second motor and the cutting blade, so the cutting object can be cut automatically, and the cutting device can be moved conveniently through the setting of the support plate and the bracket.

The invention relates to the field of building structures, and discloses a self-tie steel-wood combined joint and a mounting method. The self-tie steel-wood combined joint comprises a self-tie combined column, combined beams and beam column reinforcing kits. The self-tying combined column comprises a central column body and peripheral tie columns located on the outer side of the central column body, and the central column body and the peripheral tie columns are in mortise and tenon connection to form a square column body. Flange plates of the combined beams are in mortise and tenon connection with webs; The flange plates are in mortise and tenon connection with the peripheral tie columns. Each beam column reinforcing kit comprises two column outer ring plates, and the column outer ring plates are arranged on the self-tie combination column in a sleeving mode and connected with the flange plates through bolts. According to the self-tie combined column, every two surrounding tie columns are tied, the central tie column and the surrounding tie columns are tied mutually, and the integrity and the energy dissipation capacity of members are improved; The energy consumption form of the self-tie combined column is mainly mutual staggered friction of different parts of the self-tie combined column in the vertical direction, and the phenomenon that a single member is damaged can be avoided.

The invention discloses a sheet for a heat exchanger and belongs to the technical field of heat exchange devices. The sheet is mainly composed of a base body and heat exchange flow channels machined in the base body through chemical etching, wherein each heat exchange flow channel is divided into a flow distributing channel, a converging channel and curved channels. The flow distributing channels are communicated with the converging channels through the curved channels, the free ends of the flow distributing channels are medium inlets, and the free ends of the converging channels are medium outlets. According to the sheet, the mode that the pair of converging channel and flow distributing channel correspond to multiple curved channels of each heat exchange flow channel is adopted, the heat exchange efficiency at an inlet and an outlet of the heat exchanger is enhanced, and the problem that the heat exchange efficiency is lowered due to increasing of the hydraulic radiuses of the flow channels of the heat exchanger is solved.

The invention discloses a trimming and leveling device for house building prefabricated wallboards and a using method thereof. The trimming and leveling device comprises a vehicle body; a fixing rectangular groove is formed in the inner side wall of the vehicle body; a fixing frame is slidably connected with the inner side wall of the fixing rectangular groove; a grounding plate body is welded tothe lower surface of the fixing frame; a telescopic frame is welded to the upper surface of the grounding plate body; and a fixing sleeve is welded on the upper surface of the grounding plate body. Through the vertical installation of a guide rail shell and cooperation with the stably grounded grounding plate body, leveling can be directly carried out by means of a mechanism. Meanwhile, the leveling requirements of the different prefabricated wallboards with different heights can be met through adjustment by means of the cooperation of the telescopic frame and a top tray. Meanwhile, the top tray can achieve the limiting effect on a push rod, so that the phenomenon that a saw disc continues to advance upwards, and consequently dangerous accidents or wall damage is caused is avoided; and through the cooperation of laser sensors and inductance patches, the positioning and leveling of a uniform horizontal plane can be provided in the cutting and leveling process of a row of prefabricated wallboards.