52results about How to "Reduce support strength" patented technology

The invention provides a gradient-type supporting method for selective laser melting forming of a three-dimensional flow shrouded impeller. In the process of selective laser melting forming of the three-dimensional flow shrouded impeller, supporting structures of different strength are designed according to the distance from the forming part of the impeller to the opening part of the impeller andthe magnitude of an overhanging angle. Aiming at the structural characteristics of the three-dimensional flow shrouded impeller, a gradient-type supporting structure is designed according to the length from different parts of an inner cavity of the impeller to the opening part of the impeller and the overhanging angle. Under the condition that deformation in the process of selective laser meltingforming of the impeller is effectively controlled, the supporting strength is locally reduced, the supporting forming time is shortened, the difficulty of supporting removal is reduced, the workload is reduced, and the overall manufacturing cycle of the impeller is shortened.

The invention discloses a clothes dryer. The clothes dryer comprises a casing and a filtering device. A drying air duct is arranged in the casing; the casing comprises a front panel and side panels connected with the front panel, and the front panel is provided with a clothes feeding inlet; a mounting opening is formed in each side panel, and the filtering device is inserted and mounted in the drying air duct through the mounting openings. In the clothes dryer, the mounting openings for the filtering device are formed in the side panels of the casing, the filtering device can be inserted and mounted in the air duct through the side panels, and the mounting openings for the filtering device are prevented from being formed in the front panel, so that the integrated appearance of the front panel is ensured, and the problems that the supporting strength of a front support is reduced and the structural stability of the overall clothes dryer is not ensured when a large mounting opening for the filtering device is formed in one surface, facing the front panel, of the front support are avoided.

The invention discloses a motor steering transmission system for a full-revolving propulsor. The motor steering transmission system comprises a steering motor bracket, transverse plates and a mountingflange, wherein two ends of the steering motor bracket are fixedly installed through matching of two sets of parallel transverse plates and the mounting flanges, the upper end surface of the transverse plate at the upper end is fixedly mounted with a steering motor, and the bottom end surface of the mounting flange at the bottom end is provided with a rotary propeller. The steering motor of the motor steering transmission system for the full-revolving propulsor is supported by an independent steering motor bracket, so that the rigidity of the whole system is increased, and the support strength of a speed-reducing gear box is reduced. When the steering transmission system encounters a large external force, a safe clutch can be automatically disengaged to play a protecting effect, a position sensor can provide an alarm indication, the reset operation of the safe clutch is very simple, consumes short time and has little impact on the operation of a ship, the elastic coupler can bear larger end face runout and radial runout between the steering motor and the speed-reducing gear box.

The invention relates to the field of tunnel construction, in particular to a rapid construction method of a high-pressure water-rich fault zone of a tunnel, which solves a plurality of problems in the construction method of high-pressure water-rich fault zone tunnels under the guide of the traditional knowledge. A draining branch tunnel is additionally arranged between a main tunnel and a parallel heading, the water flow pressure of the hanging wall of a fault interface is reduced progressively, and a large amount of water is discharged from the main tunnel by adopting a guiding and non-clogging mode; when the water pressure of the main tunnel is reduced to 0.3-0.5MPa, an informationized tracking and accurate grouting method is used for grouting and reinforcing the main tunnel; and rapidly excavating and sealing technology is used for excavating the main tunnel and the parallel heading. The invention adopts the technology combining the water distribution and pressure reduction mode, the informationized tracking and accurate grouting method and the rapidly excavating and sealing technology for high-pressure water-rich shattered fault zones for the first time, breaks through the traditional concept that the water distribution and pressure reduction mode is opposite to the grouting and reinforcing construction method, solves the world-class problem of construction of the high-pressure water-rich fault zone of the tunnel, improves the construction progress and the construction efficiency, and ensures safe and rapid perforation of the tunnel.

The invention relates to a conference chair. A rotary positioning mechanism is arranged at the joint of front chair legs and rear chair legs; due to the rotary positioning mechanism, the front chair legs and the rear chair legs can rotate opposite to each other to be folded or unfolded by a certain degree; a connecting rod A is fixed between the two rear chair legs; a connecting rod B is fixed between the two front chair legs; a seat is rotationally fixed on the connecting rod A; the chair is supported by the connecting rod A and the connecting rod B together; a chair back tilt adjusting assembly is arranged between the chair back and the front chair legs; and a writing board assembly is rotationally mounted on at least one rear chair leg. The conference chair has the beneficial effects that the structure is simple, the chair back can be slightly tilted, a user can conveniently perform conference records on the chair, and the chair can be folded and stored.

A physical quantity sensor includes: a base; wiring disposed in the base; a support that includes a first bonded surface bonded to the base and a second bonded surface bonded to the wiring; a suspension beam connected to the support; and an electrode finger supported by the suspension beam. The support is located between the first bonded surface and the suspension beam and includes a first overhang separated from the base.

In order to provide a guide roller which can be readily mounted on a support member and readily adjusted in position without reducing strength of a support shaft, according to the invention, when inserting a screw part of the shaft through a long hole of the support member and fixing the shaft by a nut on a back side, the screw part is inserted while contacting notched planes with contact parts, and an insertion position of the screw part is made adjustable in the long hole. It is possible, without necessity to form an engaging part for calking in the columnar shaped support shaft, to prevent reduction in strength of the guide roller, to position the guide roller with respect to a rail only by screwing the guide roller to the support member after previously fixing the support member to the slide door, and to make the operation efficient.

A vibration device which is possible to secure the fixing of a vibrating element and to reduce deterioration in characteristics of the vibrating element includes a substrate, a plurality of elastic members each of which includes a connection portion connected to a first surface of the substrate, and a support portion extending from the connection portion to a position separated from the connection portion, and a vibrating element that is supported at the support portion, in which the vibrating element is supported by the plurality of elastic members via three or more support portions.

The invention discloses a coal mining method of a full-negative-pressure continuous mining machine for leftover coal, and belongs to the technical field of coal mining. The problems that when a coal mining method of a continuous mining machine is adopted in leftover coal resources, full-negative-pressure ventilation cannot be achieved in a mining cave, and the yield is low are solved. The method comprises the four steps of crossheading roadway arrangement, stoping unit branch roadway arrangement, stoping unit mining and leftover coal section mining. According to the method, roadway arrangement is flexible, the resource recovery rate is high, local ventilator air supply is completely canceled during mining cave stoping, ventilation air methane air flow is prevented from returning to a stoping branch roadway, branch roadway through holes are additionally formed in a stoping unit, and ventilation management and safety are facilitated; and meanwhile, according to the coal mining method, one continuous mining machine and matched equipment are adopted for roadway tunneling and mining cave stoping, mining and tunneling are integrated, the number of newly-added personnel is small, the investment is relatively low, the coal yield is guaranteed, and good benefits can be obtained.

The invention discloses a method for controlling surrounding rock in gob-side entrydriving of a working face of a deep island. The method comprises the following steps of performing pre-cracking and top breaking before stoping of two adjacent working surfaces of the working face of the island, so as to avoid forming a hinge structure at the end surface of the working face, and avoid the hinged rock beam at the critical layer transferring the stoping stress of covering rock of the adjacent working faces to the working face; selecting a constant-drag large-deformation anchor bolt in a gob-side entrydriving support system, increasing the lengths of anchor bolts at the coal wall side and top plate side, deforming the anchor bolts to relieve pressure, and enabling anchor cables to transfer the concentrated stress of the surrounding rock to the farther physical coal wall; slantwise and downwards drilling pressure relief holes in the physical coal wall side with 3 to 4 cycle roof weighting paces in advance at the working face of the island; spraying slurry to the narrow coal column side. The method has the advantages that the stress concentration degree of the deep working face is effectively reduced, the drags of a bracket, a support column and support are reduced, the stoping efficiency of coal sources is improved, the safe and efficient stoping efficiency of the working face is also improved, and the major technical and economic benefits are realized.

The invention relates to a deep foundation pit support construction technology, and relates to the technical field of engineering facility construction. A single row of piles is arranged on the inside of the deep foundation pit, and the single row of piles is evenly distributed along the extension direction of the side wall of the deep foundation pit; At a position of 5 meters, the bottom of the fixed pile is lower than the preset lowest point of the deep foundation pit; S300: A horizontal steel frame is installed between the fixed pile and the single row of piles, and the two ends of the horizontal steel frame are connected to the fixed pile and the single row of piles respectively. The pile connection, the length direction of the horizontal steel frame is perpendicular to the side wall of the deep foundation pit. The invention has the effect of improving the verticality of the side wall of the deep foundation pit under the condition of reducing the occupation of the space in the deep foundation pit.

The invention discloses a high-density and low-shrinkage rubber and plastic thermal insulation material and a preparation method thereof, and relates to the technical field of thermal insulation materials. The thermal insulation material includes 18 to 24 parts of rubber, 18 to 24 parts of a foaming agent, 68 to 82 parts of a smoke abatement flame retardant, 8 to 12 parts of carbon black, 13 to 17 parts of polyvinyl chloride resin, 1.3 to 1.7 parts of stearic acid, 1.3 to 1.7 parts of a dispersant, 1.3 to 1.7 parts of a calcium-zinc stabilizer, 28 to 32 parts of chlorinated paraffin oil, 5 to 8 parts of ointment, 14 to 17 parts of argil, 6 to 8 parts of silicon dioxide, 3.1 to 4.5 parts of an accelerant and 5 to 10 parts of glass fiber powder. By adding the glass fiber powder, the glass fibers can be arranged along the flowing direction in the processing process, so that the shrinkage of the rubber and plastic material is effectively reduced; besides, the argil, as a filler, can improve the mechanical properties of the rubber, improve the processability of the material, play a reinforcing role, reduce the supporting strength of the material to bubble walls, and reduce the problem of spouting or collapse.

The invention discloses waste rock throwing equipment suitable for a fully mechanized coal mining face roadway. The waste rock throwing equipment comprises a waste rock throwing belt inclining towards a filling area, a block cover frame arranged right above the waste rock throwing belt, crushing and angle grinding devices, first guide rails and a monitoring device; the multiple crushing and angle grinding devices are mounted in the block cover frame and are arranged in the conveying direction of the waste rock throwing belt, and the distances between the lower ends of the crushing and angle grinding devices and the upper surface of the waste rock throwing belt are equal; the first guide rails are symmetrically arranged at the left side and the right side of the blocking cover frame, the first guide rails and the crushing and angle grinding devices are longitudinally arranged in an alternative manner, and a set of first guide rail is installed between every two adjacent crushing and angle grinding devices; and the monitoring device is mounted on the first guide rails and clamped at the left side and the right side of the waste rock throwing belt.

A physical quantity sensor includes: a base; wiring disposed in the base; a support that includes a first bonded surface bonded to the base and a second bonded surface bonded to the wiring; a suspension beam connected to the support; and an electrode finger supported by the suspension beam. The support is located between the first bonded surface and the suspension beam and includes a first overhang separated from the base.

The invention relates to a deep foundation pit support construction process, and relates to the technical field of engineering facility construction. The deep foundation pit support construction process comprises the following steps that S100, a groove is pre-dug along the side line of a deep foundation pit on a construction site, an enclosure body is arranged, single-row piles are arranged on theinner side, close to the deep foundation pit, of the enclosure body, and the single-row piles are uniformly distributed in the extending direction of the side wall of the deep foundation pit; S200, fixing piles are arranged on the outer side, far away from the deep foundation pit, of the enclosure body, the fixing piles are arranged at the positions which are more than 5 meters away from the vertical distance of the enclosure body, and the bottom ends of the fixing piles are lower than the preset lowest position of the deep foundation pit; and S300, a horizontal steel frame is arranged between the fixing piles and the single-row piles, the two ends of the horizontal steel frame are connected with the fixing piles and the single-row piles respectively, and the length direction of the horizontal steel frame is perpendicular to the side wall of the deep foundation pit. The deep foundation pit support construction process has the effect that the perpendicularity of the side wall of the deep foundation pit can be improved under the condition that the space occupied in the deep foundation pit is reduced.

The invention discloses a light-weight and high-efficiency heat-dissipating LED lamp, which comprises a lamp holder, an LED lamp base plate and a heat sink, the lamp base is connected with the heat sink, and at least one LED lamp is arranged on the LED lamp base plate. The radiator is provided with at least one heat dissipation channel, at least a part of the heat dissipation channel is formed by the LED lamp substrate, and the heat dissipation channel is provided with an air inlet and an air outlet. The present invention aims to provide a light-weight, high-efficiency, heat-dissipating LED lamp with rapid heat dissipation, simple structure and light weight.