69results about How to "Avoid abnormal damage" patented technology

The invention relates to a forming belt automatic skew detection shearing extrusion and flexible shell smashing device for a walnut, which is characterized in that the walnut is subjected to the action of a periodic concentrated force, so that the shell smashing uniformity of the walnut is realized, the shell smashing efficiency is improved, and the integrity of a walnut kernel is ensured. The forming belt automatic skew detection shearing extrusion and flexible shell smashing device for the walnut comprises supports; a feeding hopper is arranged on the supports; a conveyer is arranged at the outlet of the feeding hopper; the conveyer is provided with a serration belt for conveying the walnut to the other ends of the supports; an extrusion device arranged above the conveyer and used for performing extrusion on the conveyed material is also arranged on the supports; a synchronous belt is adopted by the extrusion device; flexible shell smashing is performed on the walnut by utilizing pressure between the synchronous belt and the serration belt; an automatic skew detection device for the synchronous belt is also arranged on the supports; the automatic skew detection device comprises a bottom end rail connected with the supports; the bottom end rail is provided with a top end rail through a rotation device; the top end rail is provided with a self-aligning carrier roller so as to bear the synchronous belt; the lower end rail is provided with a limiting device for limiting the rotation angle of the top end rail; the top end rail is provided with a synchronous belt limiting device.

The invention provides hob height adjustment methods based on gaskets and positioning blocks, belongs to the field of a cutter and cutter head structure design of a shield tunneling machine, and particularly relates to two hob height adjustable methods for a combined type cutter. The methods adopt two cutter head structure forms for adjusting the gaskets and the positioning blocks; the cutter head structure form based on the gaskets realizes hob height adjustment by adding the gaskets with different thickness into the cutter head structure; and the cutter head structure form based on the positioning blocks realizes the hob height adjustment by changing the positioning blocks with different sizes. Through hob height adjustment, working performance of a hob and a scraper can be greatly improved, simultaneously, and by virtue of a reasonable height difference, the reduction of the cutter life caused by abnormal damage to the cutter can be prevented; and if the uniaxial compressive strength change of racks at a drivage road section is larger, the drivage efficiency of the cutter head of the shield tunneling machine can be substantially improved by means of the reasonable height difference between the hob and the scraper, and accordingly, certain economic benefits are achieved.

The invention relates to a dynamic and static pressure ball socket bearing structure for a high speed gear shaper. The structure comprises a ball rod (1), a ball socket (2) and a shell (3), wherein the lower end of the shell (3) is connected with a cutter spindle; a ball main body (6) at the lower end of the ball rod (1) is positioned in the ball socket (2); the ball socket (2) is arranged in an installation seat of the shell (3) and is positioned and subjected to gap adjustment along the axial direction of the ball rod (1) through a pressing ring (4); and the upper end of the ball rod (1) stretches out of the pressing ring (4) and is connected with a crank. The structure is characterized in that: an oil injection hole (7) is formed in the center of the ball rod (1) and reaches the ball center of the ball main body (6); the ball main body (6) is provided with a throttler (5) along the radial direction; and the oil inlet end of the throttler (5) is communicated with the oil injection hole (7) which reaches the ball center, and the oil outlet end of the throttler (5) is communicated with an annular shallow cavity on the surface of the ball main body (6), so that the shallow cavity generates dynamic pressure bearing force and static pressure bearing force due to a step effect to bear upper and lower axial forces from a gear shaping spindle when the ball main body (6) moves. The structure is simple and has a good lubricating effect and long service life.

The invention belongs to the field of design methods for a cutter head structure of a tunneling machine and particularly relates to a design method for support ribs of a ballast slipping plate of a cutter head of a full face rock tunnel boring machine. The design method takes the overall technical performance requirement of the cutter head, the construction requirement, and the requirement of the cutter head for quickly discharging ballast into consideration while ensuring maximal strength and rigidity of the cutter head. According to the design method, four L-shaped support ribs from first to fourth are welded at the part of the ballast slipping plate on the rear panel of the cutter head, and each L-shaped support rib has an L-shaped cross section and comprises an arc part and a straight plate part. Due to the adoption of the design method, given that the rock ballast can be smoothly discharged under given conditions, the cutter head is improved in strength, rigidity and stability, so that the cutter head of the tunneling machine has prolonged tunneling service life, the tunneling machine vibration is alleviated, the noise is reduced, and the engineering economic loss in is also reduced.

The invention discloses a secondary mould returning method of magnesium carbon brick and alumina-magnesite carbon brick used for steel ladle. The method includes the following steps: firstly, mixed magnesium carbon brick or alumina-magnesite carbon brick pug used for steel ladle is weighed as required; secondly, the mixed magnesium carbon brick or alumina-magnesite carbon brick pug used for steel ladle is poured into a moulding mould, and primary moulding is carried out; the primary moulding adopts the method of first light hind heavy, step-by-step pressurization and exhaust by hanging and beating, and the thickness of moulded green brick is 0.6-1.6mm higher than design thickness; thirdly, green bricks after primary moulding are piled up, and standing is carried out for 30-60min for natural exhausting; fourthly, the green bricks obtained by the step three are placed into the mould according to mould stripping direction, secondary beating is carried out, the count of the secondary beating is half of the total count regulated by design, and beating pressure is 215-340MPa; fifthly, the green bricks obtained by the step four are subject to sampling inspection, drying, sorting and packaging. The invention has the advantage that lamination crack of magnesium carbon brick and alumina-magnesite carbon brick used for steel ladle is effectively avoided.

The invention provides disassembly and assembly equipment for a bearing box of a working roll of an aluminum foil mill and can solve the problems in the prior art that abnormal damage is liable to be caused in disassembly and assembly of the bearing box and the disassembly and assembly efficiency is low. The technical scheme is that the disassembly and assembly equipment comprises a roll bed, U-shaped racks, worktables and operating devices, wherein the U-shaped racks are arranged on two side of the top surface of the roll bed and used for holding the working roll; the worktables are arranged on two sides of the bed body of the roll bed and used for bearing the operating devices; the operating devices comprise transversally moving carts arranged on the table boards of the worktables; and travelling cars capable of performing lifting motion and lengthwise motion are arranged on the transversally moving carts. The disassembly and assembly equipment provided by the invention has the advantages that the positioning is accurate, the abnormal damage of the bearing box is avoided, the cost is greatly reduced, the disassembly and assembly time is shortened, the disassembly and assembly efficiency is improved, and the production requirement is met.

The invention discloses a discharging and degaussing device for an electromagnetic clutch and a method thereof. The discharging and degaussing device comprises the electromagnetic clutch and a control unit thereof, a PLC control unit which is connected with the electromagnetic clutch and the control unit of the electromagnetic clutch. The invention is characterized in that: the discharging and degaussing device also comprises an intermediate relay and a degaussing intermediate relay; wherein, the intermediate relay is connected to the digital output control end of the PLC control unit; the auxiliary normal open contact of the intermediate relay is connected to a main circuit of the degaussing intermediate relay; one of the auxiliary normal open contacts of the degaussing intermediate relay is connected with a grounding wire and the other is connected with the coil of the electromagnetic clutch; a discharging and degaussing circuit of the electromagnetic clutch is formed by the connection of the two auxiliary normal open contacts of the degaussing relay with the coil of the electromagnetic clutch and the grounding wire. The device of the invention can discharge and degauss the coil of the clutch, thus reducing the short circuit of the coil and preventing the electromagnetic clutch from abnormal damage.

The invention relates to a WMF series sealed load-bearing detecting cable. The WMF series sealed load-bearing detecting cable comprises a copper stranded wire, the outer layer ring of the copper stranded wire is coated with an insulation layer, the outer ring of the insulation layer is sleeved with an inner armor layer, and the outer ring of the inner armor layer is sleeved with an outer armor layer; the inner armor layer is commonly formed by round steel wires and a sealant layer, the round steel wires sleeve the outer portion of the insulation layer, gaps between the adjacent round steel wires are filled with the sealant layer, the sealant layer and the round steel wires commonly form a sealed structure having a circular cross section; the outer armor layer is formed by sleeving steel wires having round and dumbbell-shaped cross sections, and after the steel wires having round and dumbbell-shaped cross sections are sleeved, the outer armor layer forms a sealed structure having a circular cross section. The cable designs novel inner and outer armor layer structures to improve the sealing and the reliability of the cable while improve the cable bearing.

The invention relates to a full-automatic backwash filter. The full-automatic backwash filter comprises a tubular barrel and a lower barrel, wherein a tubular filter element is arranged in the barrel, and a cleaning rotating shaft is arranged in the filter element; the filter element is composed of a tubular inner mesh plate, a tubular outer mesh plate and a foldable filter screen; a left scraping plate and a right scraping plate are symmetrically arranged on the cleaning rotating shaft, wherein the left scraping plate is provided with a cleaning groove, the cleaning groove stretches deep into the left scraping plate in the radial direction of the cleaning rotating shaft to form a flow passage, and the cleaning groove is communicated with a tubular shaft at the lower end of the cleaning rotating shaft; an opening of the cleaning groove makes contact with the inner mesh plate of the filter element. According to the full-automatic backwash filter, the structural design of the fixed filter element and the cleaning rotating shaft is adopted, the running torque of the cleaning rotating shaft is quite small, the opening of the cleaning groove in the left scraping plate is an inverted horn-shaped opening, a divergent nozzle design in fluid dynamics is adopted, differential pressure inside and outside the filter element is fully utilized, so that the flow velocity of cleaning fluid is increased, and the cleaning effect is improved effectively; the service life of the filter element can be effectively prolonged, and the maintenance cost of the filter in a later period is lowered substantially.

The invention discloses a machining method for a transmission drum of a belt conveyor, and belongs to the field of conveyors. The machining method disclosed by the invention comprises the following steps: A. production for a drum shell: machining a raw material of the drum shell into the drum shell through the working procedures of blanking, arc pressing, rolling, welding and roundness correction sequentially; B. production for a central shaft: machining a raw material of the shaft into the central shaft through the working procedures of blanking, rough turning, quenching and tempering, and finish turning sequentially; C. turning machining for a centre plate; D. assembly: assembling the machined drum shell, centre plate and central shaft into one piece to form the drum; E. coating the surface of the drum with a rubber layer; and F. carrying out turning treatment on the rubber layer on the surface of the drum, and machining surface patterns. The machining method disclosed by the invention contributes to improving the use performance of the transmission drum, avoiding abnormal damage of the drum in use, and guaranteeing the efficient running of a conveying system.

The invention relates to a shale gas horizontal well high pressure bridge plug pumping device, including a well barrel, a well opening mechanism, a well opening bridge plug packaging mechanism, a bridge plug pumping mechanism, and a fracturing fluid pumping mechanism. The well opening mechanism and the well opening bridge plug packaging mechanism are correspondingly connected to both ends of the well barrel, and the bridge plug pumping mechanism and the fracturing fluid pumping mechanism are connected with the well barrel in a pipeline mode. Due to the fact that the bridge plug pumping mechanism and the fracturing fluid pumping mechanism of the shale gas horizontal well high pressure bridge plug pumping device are separately arranged, independent control over the bridge plug pumping mechanism and the fracturing fluid pumping mechanism can be realized without interference, and the bridge plug pumping mechanism can be maintained during operation of the shale gas horizontal well high pressure bridge plug pumping device; and a pressure relief assembly can ensure normal starting of the well opening mechanism, etc., abnormal damage of the shale gas horizontal well high pressure bridge plug pumping device is avoided, and working reliability of the well opening mechanism, etc., can be further ensured.

The invention relates to a wireless intelligent locking electric connector, and the connector comprises two plugging ends, and further comprises one or more wireless intelligent control locking modules and a far-end wireless instruction transmitting module; the wireless intelligent control locking module comprises a wireless receiving control module and an electromagnet which are arranged at a plug end, and the wireless receiving control module inputs a power supply through the functional module printed board and controls power supply of the electromagnet; the wireless intelligent control locking module further comprises an adsorption fixing end which is arranged at the other plug end and attached to the electromagnet when the two plug ends are plugged in place. And the wireless instruction transmitting module transmits an unlocking signal to the wireless receiving control module. According to the invention, through the wireless intelligent control locking module, the automatic electromagnetic locking between the plug and the socket of the electrified electric connector is achieved, and the continuous locking can be carried out under the condition that the system is electrified. According to the invention, the damage to a functional board card and a connector and even abnormal damage such as burnout of the whole system caused by live-line misplug and unplugging can be effectively avoided.

The invention provides a reverse opening and closing cut-off valve, including a valve body, a valve seat, a valve stem and a valve disc; the valve seat and a through hole in the middle of the valve body, and the valve stem is arranged in the through hole of the valve body and the valve seat The center can move up and down; the valve seat is arranged on the valve body, the maximum width of the valve disc is greater than the diameter of the internal through hole of the valve seat and is located below the valve seat, and the middle part of the valve disc is provided with The blind hole is used for connecting with the valve stem. The reverse opening and closing cut-off valve of the present invention has a novel structure and is easy to open and close; the sealing surface is set on the valve seat, and the valve seat is removable, which can realize online maintenance; an upper seal is added to prevent the medium from entering the bellows when the valve is opened Cavity; the sealing surface of the valve is a linear sealing surface, and the direction is downward, avoiding the abnormal damage of the sealing surface caused by the accumulation of particles in the medium, effectively prolonging the service life of the valve; reducing parking and replacement, and reducing the labor intensity of the operator on site , Put an end to the damage caused by the leakage of the valve to the environment and the person.

The invention relates to a shock absorber installation structure. The shock absorber installation structure comprises a shock absorber, a shock absorber installation shaft and a frame, wherein the shock absorber installation shaft is matched with the shock absorber, and the frame is used for fixing the shock absorber installation shaft. The shock absorber installation shaft is a stepped shaft and comprises a first diameter part, a second diameter part, a third diameter part and a fourth diameter part, wherein the diameters of the first diameter part, the second diameter part, the third diameter part and the fourth diameter part gradually decrease. A threaded section is arranged on the fourth diameter part and matched with a self-locking nut. The shock absorber installation shaft and the frame are connected and fixed by locking the self-locking nut. According to the technical scheme, by limiting the radial displacement and the radial rotation of the shock absorber installation shaft, the abnormal damage to installation rubber pads is avoided, the deformation of the first installation pad and the second installation pad in the disassembly and assembly process is avoided, the risk that a shock absorber installation support cracks is lowered, and the assembly efficiency of a shock absorber is improved.

The invention relates to a design method for dreg slide plate curved surfaces of a heading machine cutter head, and belongs to the field of design methods for heading machine cutter head structures. In the surface design method, technical performance requirements for the overall heading machine cutter head, construction requirements and requirements for smooth dreg removal of the cutter head are taken into consideration, the dreg discharging track on conventional dreg slide plates is changed, and shapes of dreg slide plate curved surfaces of the cutter head are constructed according to the steepest descent curve. The design method includes respectively designing a first, a second, a third, a fourth, a fifth and a sixth dreg slide plate curved surfaces of the cutter head, and uniformly welding the designed dreg slide plate curved surfaces to a back panel of the cutter head and supporting plates on the periphery of the cutter head. In application of the cutter head dreg slide plate curved surfaces designed by the method, dregs slide smoothly and sequentially, the cutter head dreg discharging efficiency is increased, vibration and noises of the heading machine are reduced effectively by means of changing the dreg discharging track, and research cycle of the heading machine is shortened; therefore, heading service life of the heading machine cutter head is prolonged and economic loss caused in engineering is reduced.