44 results about "Plate fracture" patented technology

The invention discloses a high-geostress dam foundation excavation construction technology. According to the high-geostress dam foundation excavation construction technology, before the excavation of a dam foundation, a dam foundation protecting layer with slope being smaller than or equal to that of the dam foundation and thickness being 25-40 times diameter of bottom charge of a bench blast hole is reserved; and anchor bars running through the dam foundation protecting layer and the dam foundation are pre-anchored before the dam foundation protecting layer is excavated to form a foundation building surface of a designed dam foundation. By adoption of the high-geostress dam foundation excavation construction technology, uploading relaxation and backfilling deformation, even the phenomena of'crack slip', plate fracturing and local rock bursting caused by high geostress in the excavation of the dam foundation are avoided, therefore secondary excavation resulting from the uploading relaxation and the backfilling deformation of the foundation building surface of the dam foundation can be effectively avoided; and by consolidation grouting and repeated anchoring construction, the construction period and the construction cost are greatly saved and a remarkable economic benefit is obtained.

The invention provides a two-dimensional rational extrusion oil gas transporting poly-graphic physical simulation device. The two-dimensional rational extrusion oil gas transporting poly-graphic physical simulation device comprises a model main body for filling a two-dimensional material model, a cover plate and a pressing plate provided with a piston, wherein the cover plate is made of transparent glass and is provided with a supporting surface for supporting the two-dimensional material model; and the two-dimensional material model is positioned between the cover plate and the pressing plate provided with the piston, and the pressing plate provided with the piston is used for extruding the two-dimensional material model on the cover plate. According to the invention, the two-dimensional material model is compacted by the piston, the situation that the graphic cover plate fractures and an instrument is damaged because of overdosage compaction of the two-dimensional material model is avoided; the problem that model filling is failed due to obvious deformation or collapse generated by insufficient compaction of the two-dimensional material model is solved; and the problem of multi-solution of a transportation conduction system due to invisible deformation or collapse generated by insufficient compaction of the two-dimensional material model is solved, therefore the authenticity of experiment phenomenon and experimental result is ensured.

The invention proposes an oriented danger removing method for a high mine pressure roadway of a coal mine. According to the method, the mode that transverse (the cross section of the roadway) pressure relief and longitudinal (in the walking direction of the roadway) pressure relief are combined is adopted. A set of drill holes are arranged in the direction of the roadway at the interval of 5m, when the side pressure coefficient is larger than 1.5, a bottom plate can be extruded to move downwards after horizontal stress is decomposed on the drill holes in the side of the roadway, a bottom plate fracture area is formed through pressure relief blasting of the drill holes in the two sides so that stress transmitted from the deep portion of the base plate can be cut off, and development of a heaving floor is weakened; crushing belts are arranged in the roadway at certain intervals and have the functions of spring bodies, energy brought by the horizontal stress in the walking direction of the roadway is absorbed, and the heaving floor phenomenon of the roadway is solved fundamentally.

The invention provides a method for determining the thickness of a safety top plate in down-traversing a gob by a tunnel. The method includes the following steps that the damaged depth D of a bottom plate of the gob is calculated; the thickness s of a virgin rock protection layer is calculated; the distance R between the center of the tunnel and a vault fracture area is calculated; the thickness H of the safety top plate is determined according to the following equation: H>= D+s+(R-r), wherein r is the radius of the channel. The problems that the tunnel and a base plate fracture area of the gob are mutually affected, the tunnel collapses and a roof collapses due to the excessively small thickness of the safety top plate are solved, and therefore the construction risks of the tunnel are reduced.

The invention relates to the field of furniture production equipment, in particular to a perforating device for a furniture plate. The perforating device comprises a left bed plate and a right bed plate on a rack, perforating mechanisms are arranged on the left bed plate and the right bed plate respectively, a left plate clamping mechanism is arranged on the left bed plate, and a right plate clamping mechanism is arranged on the right bed plate; the left plate clamping mechanism comprises a first translation mechanism and a movable plate clamping mechanism; the right plate clamping mechanism comprises a second translation mechanism and a fixed plate clamping mechanism; and the perforating mechanism comprises a third translation mechanism, a lifting mechanism, an axial moving mechanism andan electric drill. According to the perforating device, a plate to be processed is clamped by the left plate clamping mechanism and the right plate clamping mechanism, and the plate is bidirectionallyperforated through the perforating mechanisms on two sides of the plate, the technical problem of "plate fracture caused by perforating on one side of the plate" existed in the prior art is effectively solved, and the perforating quality is effectively improved to guarantee the product quality.

The invention discloses a coalmine Ordovician-limestone high-pressure-bearing water bottom plate fracture grouting material and a preparing method thereof. The grouting material is characterized by comprising, by weight, 60 parts of coal gangue powder, 25 parts to 30 parts of ordinary portland cement and 10 parts to 15 parts of clay in a mixing-grinding mode, wherein the size of particles of the coal gangue powder obtained before mixing is smaller than 45 un. According to the coalmine Ordovician-limestone high-pressure-bearing water bottom plate fracture grouting material and the preparing method, on the basis that high-pressure-bearing limestone at a specific-depth portion of a coalmine is reconstructed, coal gangue is sufficiently used for reducing the cost of the grouting material; the clay is a raw material low in price and easy to get, the requirements for the indexes of the grouting material are met while cost is saved, the waste coal gangue of the coalmine can be sufficiently used for treating an Ordovician-limestone water partition layer accordingly, the grouting treatment cost can be effectively reduced, the enterprise income can be increased, and the mine-lot ambient environment can be easily improved.

The invention discloses a prediction method for height of a filling and mining water flowing fracture zone, and belongs to the technical field of mine production safety. The height of a roof fracture zone is subjected to theoretical analysis and calculation with a rock mechanics theoretical method, and traditional experience prediction on the top plate fracture is lifted to theoretical prediction. Geologic overview and filling technical characteristics of different mines are fully considered, so that a calculation process of a water flowing fracture zone of a roof is more accurate and specific, thereby, making up a blank of a current theoretical calculation method for the height of the filling and mining the water flowing fracture zone, and providing more support and guarantee for the mine safety production.

The invention relates to the technical field of plate heat exchangers, in particular to an anti-inner leakage plate heat exchanger. A medium entering from a hot flow inlet and a medium entering from acold flow inlet flow past in sequence on every two adjacent first plates; due to a block of a first sealing component, the media separately outflow from a hot flow outlet and a cold flow outlet; heattransfer is performed on the cold and hot media on every two adjacent first plates through heat transfer of the first plates so as to complete heat exchange; after surfaces of the first plates generate fine cracks due to the fact that the first plates are suffered from corrosion, the media leak from the cracks into foam metal layers, and the leaked media are mixed into media in heat exchange inlets and media in heat exchange outlets, that is, after the first plates fracture, a cross-flow phenomenon cannot occur on the two media exchanging heat mutually, and therefore, the explosion phenomenoncaused by the fact that the two media exchanging the heat are mixed is avoided; and meanwhile, heat exchange is performed through two layers of the first plates and media flowing in the heat exchangeinlet and the heat exchange outlet, further improving heat exchange performance. The condition of the adverse action can be easily caused after inner leakage occurs on a traditional plate heat exchanger is solved.

The invention discloses a winding type high-voltage battery, which comprises winding plates, electrode plates, diaphragms and winding cores, wherein the winding type high-voltage battery is an overlapping combination of two winding cores; each winding core comprises one winding plate and one electrode plate; the two ends of each electrode plate are in a reverse vortex shape and respectively cover the outer peripheries of the two winding plates; the diaphragms cover the outer walls of the electrode plates. A two-end reverse winding method is used; the two winding cores are jointly made into one winding core, so that the electrode plate fracture or powder falling can be avoided; the defect of overlapping winding is overcome; the goal of increasing the electrode plate length is achieved; the high capacity of the battery is realized.

The invention discloses a protection strengthening type wing-shaped fixture comprising a front clamp, a rear clamp, insulation pull plates on the two sides and protection ropes, wherein the protective insulation protection ropes parallel to the insulation pull plates and wire tightening screws are arranged on the two sides of the front clamp and the rear clamp of the fixture, one ends of the insulation protection ropes are arranged on the front clamp, the other ends are connected with the wire tightening screws, the wire tightening screws are connected to the rear clamp, and the screw length of the wire tightening screws is greater than that of wire tightening screws used for fixing the insulation pull plates. As the protection ropes parallel to the insulation pull plates are arranged on the two sides of the front clamp and the rear clamp of the fixture, a protection plate on the same side can still be stressed to play an effective protection role when one pull plate or pin is broken. Therefore, the occurrence of insulator string or wire falling-off accidents caused by pull plate fracture or tripping can be avoided.

The invention provides an inverted-arch interlocked girder and a construction method thereof. The inverted-arch interlocked girder comprises a plurality of interlocked girder bodies and a plurality of inverted arch bodies. The plurality of the interlocked girder bodies are arranged in parallel, the plurality of the interlocked girder bodies and the plurality of the inverted arch bodies are in perpendicular lap connection and fixed through anchor rods and nuts, and the inverted arch bodies are disposed above the interlocked girder bodies. According to the inverted-arch interlocked girder and the construction method thereof, the interlocked girder bodies and the inverted arch bodies are in perpendicular lap connection and fastened through the anchor rods and the nuts, so that the support stability is guaranteed, the effective contact area between the inverted arch bodies and a base plate can be increased, the line contact is changed into net contact, the stress uniformity is increased, and base plate fractured rock is effectively prevented from projecting among support rows.

The invention discloses an intervertebral space opening device and a use method. The device is used for opening an intervertebral space in operations such as lumbar vertebra posterior-path spondylolisthesis reduction and bone graft fusion internal fixation. According to the scheme, the intervertebral space opening device comprises an intervertebral insertion and an opening clamp, the intervertebral insertion comprises an insertion body, a support part and a connector, and the opening clamp comprises a clamp head and a clamp handle; the support part is arranged at the rear end of the insertion body, the connector is arranged on the support part and used for being connected with the clamp head of the opening clamp, and the clamp head is provided with a groove matched with the connector. The intervertebral space opening device can easily and effectively open the intervertebral space, the inner width and the outer width of the opened space are similar, the phenomenon that the opened intervertebral space is narrow in front and wide in back can not occur, the problem that when an interbody fusion cage or a test mold is forcibly placed, end-plate fracture, interbody fusion cage collapse and the like occur is avoided, the operation process is accelerated conveniently for the operation, the operation time is shortened, the operation safety is improved, the success rate is increased, and then pain of patients is relieved.

The invention relates to the technical field of plate machining, and discloses a medical polymer plate bending method. The method comprises the steps that 1, a plate is placed on a workbench and limited by a limiting wheel, a first air cylinder is started to push a pressing plate to press the plate, and the plate distance to be bent is measured through a graduated scale till the bending line of the plate distance to be bent is aligned to a heater; 2, a power device is used for driving the heater to do reciprocating motion, and the heater is started to adjust the temperature of the heater to be100-150 DEG C for heating the plate; 3, after the heater heats the plate for 10-30 min, a positioning rod pointing angle ruler is used for positioning the bending angle, and a second air cylinder isstarted to push the plate to be bent; and 4, when a piston rod of the second air cylinder is flush with the plate, bending is finished, and the first air cylinder is reset to take out the plate. Platebending and heating are convenient, and plate fractures are reduced.

The invention discloses a plate opening device for a curled plate. The plate opening device comprises a base, a supporting rod is fixedly connected to the upper part of one side of the base, a first servo motor is installed on one side the lower part of the supporting rod, and fixedly connected with the base, and one side of the first servo motor is connected with a first driving wheel in a transmission mode through a first motor shaft. According to the plate opening device for the curled plate, through arrangement of a fixture, the curled plate can be fixed conveniently; through arrangement of a heating furnace, the curled plate can be heated and softened conveniently in advance, and thus the plasticity of the curled plate is achieved; through arrangement of a rolling plate, the curled plate can be moved to the position between the rolling plate through the fixture, the curled plate is rolled through a hydraulic rod driving the rolling plate to keep the curled plate flat, plate opening of the curled plate is achieved, according to design, the conditions that damage to people caused by tools in the traditional manual plate opening process and plate fracture due to unsoftened platesin the traditional plate opening process are avoided.

The invention relates to the field of furniture processing and discloses an arc hot press. The arc hot press comprises a press base, an upper die and a lower die. A first movable groove is formed in the lower die, a second air cylinder is mounted in the first movable groove, and the output end of the second air cylinder is connected with a convex plate; first channels used for delivering steam andsecond channels used for pumping air out are formed in the two sides of the lower die correspondingly; a second movable groove is formed in the upper die, and a concave plate is slidably connected into the second movable groove; second communicating openings are formed in the two sides of the concave plate correspondingly, and an inwards-sunken part matched with a protruding part and horizontal parts used for closely abutting against the two sides of a wood plate are arranged at the bottom of the concave plate; and third channels used for delivering the steam are formed in the two sides of the upper die. According to the arc hot press, steam softening, pressing, shape fixing and drying of the wood plate are integrated, so that the pressing efficiency of the arc wood plate is improved greatly, the wood plate can be subjected to uniform steam softening and dried, wood plate fracturing or deforming caused by nonuniform softening or nonuniform drying of the wood plate is avoided, and thepressing effect of the arc wood plate is enhanced greatly.

The invention relates to a chain scission and scraper plate fracture electronic alarming device for a cleaning mechanism of a coal feeder. Two proximity switches which are arranged in parallel are arranged on the two sides of a cleaning chain respectively and are used for receiving a pulse motion signal of a cleaning scraper plate and transmitting the pulse motion signal to a control circuit; and the control circuit is used for outputting an alarming signal. The working conditions of the chain and the scraper plate of the cleaning mechanism of the coal feeder can be dynamically detected on line, so that a user can be timely reminded to overhaul the cleaning mechanism in time once abnormal conditions occur; therefore, accidental shutdown is prevented, improvement on the integral reliability of the coal feeder is facilitated, and the probability and the time of the accidental shutdown can be effectively reduced.

The invention relates to an online monitoring device for steel rail joint clamping plate fracture and a monitoring method thereof, and belongs to the technical field of rail detection. The online monitoring device specifically comprises a first steel rail joint clamping plate, a second steel rail joint clamping plate, a first steel rail and a second steel rail, the first steel rail joint clampingplate and the second steel rail joint clamping plate are fixed to the first steel rail and the second steel rail through steel rail joint clamping plate bolts, insulating pads are mounted between thefirst steel rail joint clamping plate and the first steel rail, the insulating pads are mounted between the second steel rail joint clamping plate and the second steel rail, an insulating section is mounted between the first steel rail and the second steel rail, insulators are respectively arranged between the steel rail joint clamping plate bolts and the first steel rail joint clamping plate, thesecond steel rail joint clamping plate, the first steel rail and the second steel rail, and the first steel rail joint clamping plate and the second steel rail joint clamping plate are in series connection and are in series connection with a rail circuit. According to the online monitoring device for the steel rail joint clamping plate fracture, the structure is simple, connection is convenient,and whether the steel rail joint clamping plates are fractured or not can be accurately judged and monitored online in real time.

The invention mainly relates to the technical field of rolling shutter door rollers, in particular to a rolling shutter door roller and a sideboard assembly thereof. A metal brake disc is arranged atone end of the roller, the sideboard assembly comprises a sideboard, a rotary shaft fixing base and an electronic brake device, and the electronic brake device is arranged on the upper side of the rotary shaft fixing base; a rotary shaft at the end, provided with the metal brake disc, of the roller is fixed to the rotary fixing base and can rotate. The metal brake disc is installed at one end of the roller, the electronic brake device of the sideboard assembly brakes the metal brake disc, even though, a gear set of a rolling door machine is abraded and slips or a transmission chain of a transmission bracket plate fractures, it can be avoided that a rolling shutter door falls accidentally, and safety of the rolling shutter door is improved.

The invention provides a sintered product bearing mechanism comprising bearing plates and a sintering frame. During actual production, the bearing plates are firstly fixed in a supporting frame of thesintering frame, to-be-sintered product green bodies are placed on carrying layers of the bearing plates, the temperature differences between the carrying layers and supporting layers are reduced through flame path holes formed in the bearing plates, and the situation that the bearing mechanism is damaged by stress concentration is avoided. Due to the arrangement of a plurality of reinforcing ribs, spaces capable of transmitting heat are formed between the carrying layers and the supporting layers, the temperatures inside and outside the bearing plates are kept consistent in the sintering temperature-rise process, and the situation that the bearing plates fracture since local high temperature occurs is avoided. Due to the sintered product bearing mechanism provided by the invention, internal local stress can be reduced in the sintering process, the sintering forming process is stable, the yield of sintered products is increased, and the problem that traditional bearing plates are prone to deformation and fracturing and consequently the yield of sintered products is low is solved.