34results about How to "Reduced support requirements" patented technology

The invention discloses an ejecting type nut screwing machine and a screwing method thereof. The screwing machine comprises an electric screwdriver, a floating sleeve and a fixing device, wherein theelectric screwdriver at least can perform longitudinal reciprocating movement, and an electric screwdriver head of the electric screwdriver faces upwards; in a normal state, the floating sleeve sleeves the electric screwdriver head of the electric screwdriver, and can float up and down relative to the electric screwdriver head, and a hole used for limiting a nut is formed in the top part of the floating sleeve, and the electric screwdriver head extends into the hole in the normal state; and the fixing device is used for fixing a second component and enabling a self-rotating to-be-screwed parton the second component to be coaxial with the floating sleeve. According to the machine and the method, the design is ingenious, the structure is simple, the ejecting mode is adopted for the screwing, so that the pressure generated by conventional operation on a conveying line and a material tray is avoided, and protection of the conveying line and the material tray can be facilitated; when in assembly, an ingenious floating structure is combined with the electric screwdriver, a mode of driving a rotor shaft to rotate and ejecting the nut is adopted, so that the assembling of a belt wheel andthe rotor shaft is effectively achieved, the structure of fixing the rotor shaft is omitted, and the simplifying of the overall structure of the equipment is facilitated.

The invention discloses an L-type impact air flow attenuator which comprises an air flow buffer cavity. An air inlet pipe and an air outlet pipe are installed on the air flow buffer cavity, wherein the air inlet pipe and the air outlet pipe are communicated with a cavity body inside the air flow buffer cavity, the direction changing position of an evacuation pipeline is communicated with the air outlet pipe through the air inlet pipe on the air flow buffer cavity, the air inlet pipe is perpendicular to the air outlet pipe, and L-type layout is arranged inside the air flow buffer cavity. According to the L-type impact air flow attenuator, the characteristics of impact air flow and the evacuation pipeline are comprehensively considered, the basic principles of an interference type air flow buffer, a perforated plate and a hole plate acoustic filter are fused, and the characteristics of the flow exhaust requirements and of the evacuation pipeline and the small installation site of the attenuator are comprehensively considered. For the evacuation pipeline with pipeline steering at the position of an outlet in a security valve, the L-type impact air flow attenuator achieves the effects of dissipating the impact air flow energy, reducing the pipeline coupling, and ensuring the gas exhaust flow requirements to the greatest extent by arranging the air flow buffer cavity and communicating the direction changing position of the evacuation pipeline by the air inlet pipe and the air outlet pipe of the air flow buffer cavity.

The invention relates to a novel device for implanting instruments, which comprises a spreading rod, a spreading rod operating part, a control rod, a moving rod and a moving rod operating part, the spreading rod is a hollow tube, and the spreading rod The distal part of the extension rod can be bent as a whole or in part, the proximal end of the expansion rod is fixedly connected with the operation part of the expansion rod, one end of the control rod is connected to the distal part of the expansion rod, and the other end of the control rod is connected to On the distal part of the moving rod, the proximal end of the moving rod is fixedly connected with the moving rod operating member, and moving the moving rod operating member relative to the spreading rod operating member can realize the spreading The closing and opening of the rod, the release device also includes an anchor needle and an anchor needle push rod, the anchor needle and the anchor needle push rod are arranged in the expansion rod, and the anchor needle The distal end of the push rod is located proximal to the anchor pin. The invention can controlly release the implanted instrument connected thereto, which is beneficial to accurate positioning and improves the success rate of operation.

The invention relates to a formwork-free concrete single-chamber pipe gallery or a multi-chamber pipe gallery and a construction method thereof. The pipe gallery includes a top plate, a bottom plate and a wall that are connected to each other. The wall includes an outer wall, and also includes or does not include a partition wall. The walls are all cast-in-place reinforced concrete structures. The wall solid formwork on both sides of the wall and the wall concrete layer poured between the wall solid formwork on both sides are constituted, and the wall solid formwork adopts a reinforced truss fixed formwork, and the reinforced truss fixed formwork includes a panel and a The steel mesh and steel truss on one side of the panel, and the top and bottom plates are preferably cast-in-place concrete structures. The construction method includes floor construction, wall construction, roof construction and necessary concrete oxidation. The invention is beneficial to reduce the workload and labor intensity of pipe gallery construction, reduce the degree of influence of human factors on building quality, reduce construction costs, and reduce the adverse impact on the environment and society during the construction of the pipe gallery.

The invention discloses a deep foundation pit underground garage. The deep foundation pit underground garage comprises a foundation pit, a plurality of pile bodies, and an inner support structure, wherein the foundation pit is in the shape of circular barrel; the pile bodies are arranged in annular mode along the pit wall of the foundation pit, and are engaged with one another to form a peripherally sealed retaining wall; the inner support structure is arranged in the annular mode along the inner wall of the retaining wall; the inner part of the foundation pit faces towards a soil body to support the retaining wall; and the bottom ends of the pile bodies are supported on the bottom surface of the foundation pit. With the adoption of the design, the pile bodies are only used as media of a retaining body, the pile bodies do not depend on the soil body anchored under the bottom surface of the foundation pit to generate counter-acting force to absorb side pressure, applied to the pile bodies, of the soil body outside the pile bodies, but transmit the side pressure to an inner support ring beam, and the inner support structure bears more side pressure, so that the effects of strong support and weak piles are achieved. Materials needed for absorbing the side pressure of the soil body by additionally arranging the inner support ring beam are much less than materials needed for inserting the pile bodies into the foundation pit. With the design, the deep foundation pit underground garbage is less in material consumption and is lower in cost on the premise of realizing same soil-retaining capacity.

The invention relates to a bidirectional U-shaped coal-mining method of a thick coal bed by gateway layout along a stability layer. The method comprises the following steps of: firstly, tunneling all gateways of a mine along the stability layer so that top plates of the tunnels form the stability layer of the coal bed; and arranging actual mining gateways along the stability layer so that workingsurfaces form a bidirectional U shape along the lengths and the advancing directions, wherein a three-section actual mining process, including sapping, leveling and climbing, is adopted on the actualmining of the working surfaces along the lengths and the advancing directions. The method radically solves the difficulties in tunneling and supporting of gateway layout along soleplate in a thick coal bed in the prior art, lessens the coal pillar loss among adjacent working surfaces and is beneficial to the gas drainage of the working surfaces particularly at an upper corner. The invention is suitable for the fully-mechanized mining with large mining height and the sub-level caving mining of the loose and broken thick coal bed.

The invention discloses a preposing cyclone pre-dedusting SCR flue gas denitration technique. The flue gas extracted from a boiler economizer (12) primarily passes through a high temperature resistantcyclone separator (6), then passes through a flue gas current equalizer (7) and a static mixer (2) to unify the flow direction of the flue gas evenly; meanwhile, the flue gas after being mixed evenlywith ammonia is preprocessed before reacting with a catalyst of an SCR reactor (3); finally, the flue gas is output after the temperature is reduced through an air preheater (4) and the flue gas is dedusted through an electrical precipitator (5). The invention reduces the volume of the catalyst and the SCR reactor, reduces the requirements of the support, eliminates an SCR bypass and greatly reduces engineering cost of the SCR; meanwhile, the invention also prolongs the service life of the catalyst and the cleaning period of the air preheater without installing a soot blower or prolonging theperiod of sootblowing.

The invention discloses a diesel-electric dual-using mine cutting car. The diesel-electric dual-using mine cutting car is characterized in that the diesel-electric dual-using mine cutting car comprises an engine, a motor, a hydraulic pump set, a car body skeleton, rear wheels, a mechanical arm, a round disc cutting machine, a main control hydraulic valve set and an auxiliary control hydraulic valve set, the engine, the motor, the hydraulic pump set, the mechanical arm, the main control hydraulic valve set and the auxiliary control hydraulic valve set are all mounted on the car body skeleton; when the motor is connected with a power supply, the hydraulic pump set is directly driven to work, when the motor is not connected with a power supply, workers can start engine, the torque of the engine can be passed to the hydraulic pump set through a rotor indirectly to drive the hydraulic pump to work, thus normal work of the mine cutting car can be also realized in places lacking electricity,and the environment adaptive capacity of the mine cutting car is improved; and the round disc cutting machine cuts a groove on the fracture surface of the mine in the side direction, then a breaking hammer is used for hammering the mine side direction fracture surface on the upper part of the groove, and thus the mine side direction fracture surface on the hammering position is broken.

The invention relates to a billet or bloom continuous casting system, comprising a mold for forming a metal strand and a strand guide (2) connected to the mold (1) for supporting and guiding the metal strand, wherein the strand guide is formed by multiple strand guide segments (3a, 3b, 3c, 3d, 3e, 4), and each strand guide segment is supported via a segment support frame (7, 8) in the system support framework of the continuous casting system, and a first segment support frame (7) directly following in the strand guide of the mold supports at least two strand guide segments. In order to minimize the maintenance expense, the first strand guide segment (3a, 3d) directly following the mold is detachably mounted on the first segment support frame on substantially vertical support surfaces (12), and is configured such that the same can be installed into and uninstalled from the continuous casting system independently of the subsequent strand guide segments (3b, 3c, or 3e), and at least the last strand guide segment (3c, 3e) supported on the first segment support frame (7), exclusively together with said frame, forms an assembly unit that can be installed and removed.

The invention discloses an I-type impact air flow attenuator. The I-type impact air flow attenuator comprises an air flow buffering cavity, wherein an air inlet pipe and an air outlet pipe which are communicated with an inner cavity of the air flow buffering cavity are arranged at the two ends of the air flow buffering cavity; straight pipe sections of an emptying pipeline are communicated by the air inlet pipe and the air outlet pipe on the air flow buffering cavity; the air inlet pipe and the air outlet pipe on are arranged on a same straight line and are distributed in an I shape in the air flow buffering cavity. According to the I-type impact air flow attenuator, the properties of impact air flow and the emptying pipeline are considered comprehensively, basic principles of an interference type air flow buffer, a porous plate and a pore plate acoustic filter are integrated and extraction flow requirements of the emptying pipeline and the dynamic property of the impact air flow are considered comprehensively; the I-type impact air flow attenuator can be mounted on the straight pipe sections of the emptying pipeline outside a safety valve horizontally or vertically; the air flow buffering cavity is arranged, and the turning parts of the emptying pipeline are communicated by the air inlet pipe and the air outlet pipe on the air flow buffering cavity, so as to realize the effects of dissipating the energy of the impact air flow, reducing a coupling effect of the pipelines and guaranteeing the requirements of extraction flow.