60results about How to "Block fall" patented technology

The invention relates to a processing technology of a protective plate of a PCB (Printed Circuit Board) testing device, which comprises the following steps of: a, arranging a blind hole with a diameter of D1 and a depth of H1 on a protective plate surface facing one side of a needle placing plate relative to the position of a testing needle, wherein D1>d1 and h1<H1<h2, d1 is the diameter of a needle sheath of the testing needle, h2 is the depth of the protective plate and h1 is the installation height of the needle sheath of the testing needle; and b, arranging a through hole in the reverse position of the protective plate with the processed blind hole, wherein the diameter of the through hole is D2, the depth of the through hole is equal to that of the blind hole, D1>D2>d2, and d2 is the maximum diameter of a needle rod of the testing needle. The invention meets different hole diameter requirements for the needle sheath and the needle rod of the testing needle for the protective plate, and enables the protective plate to effectively protect the testing needle, lead and correct the positioning of the testing needle, and effectively obstruct impurities such as tin balls, flux and the like from dropping on the needle sheath of the testing needle and the needle placing plate of the PCB testing device.

The invention discloses an overturning dinner table on a medical sickbed. The overturning dinner table includes a dinner table plate, mounting bases are symmetrically arranged on one side of the bottom of the dinner table plate, connectors are arranged at the bottoms of the mounting bases, pins are arranged on the inner sides of the connectors respectively, the connectors are fixedly connected tofirst supporting rods through the pins, clamping blocks are symmetrically arranged on the side, away from the mounting bases, of the bottom of the dinner table plate, a clamping groove is formed in the bottom of each clamping block and matched with the corresponding first supporting rod, a connecting device is arranged at the end, away from the corresponding mounting base, of each first supportingrod and provided with a locking button, a first connecting sleeve is arranged on the side, close to the corresponding mounting base, of each connecting device, and one end of each first supporting rod extends to the inner side of the corresponding first connecting sleeve; a second connecting sleeve is arranged at the bottom of each connecting device, a second supporting rod is arranged at the bottom of each second connecting sleeve and is of an L-shaped structure, and the top of each second supporting rod extends to the inner side of the corresponding second sleeve. The overturning dinner table has the advantages of being much simpler in structure and capable of being folded for storage and reducing spatial occupation.

The invention discloses a paper mill fuel conveying device with the screening function. The paper mill fuel conveying device comprises a first conveying belt, a second conveying belt and a third conveying belt. Baffles are erected on the two sides of the first conveying belt to define the first conveying belt into a containing space with an opening in the upper portion. The first conveying belt is horizontally arranged, and one end of the first conveying belt serves as an output end. The second conveying belt inclines relative to the ground by 25 degrees to 35 degrees, the lower end of the second conveying belt is overlapped below the output end of the first conveying belt, and at least one rotary thumbing handle is erected above the middle portion of the second conveying belt to thumb raw materials on the second conveying belt to be flat. The third conveying belt inclines relative to the ground by 40 degree to 50 degrees, and the lower end of the third conveying belt is arranged below the higher end of the second conveying belt to receive falling materials. Conveying and screening can be integrated, the structure is simple, the screening effect is good, and time and labor are saved. The raw materials are firstly layered while the raw materials are conveyed, fuel with the larger size is separated out firstly, then impurities and fuel are separated, and the separation effect is improved.

The invention relates to a cabinet with a lifting function. The cabinet comprises a cabinet body, a lifting mechanism and supporting plates, the cabinet body is hung on an existing wall, the lifting mechanism is arranged in the cabinet body, a rectangular through groove is formed in the middle of the lower end face of the cabinet body, first through grooves are symmetrically formed in the left inner side wall and the right inner side wall of the rectangular through groove, and the supporting plates are clamped in the first through grooves. The cabinet with the lifting function adopts the design concept of a double-lifting mode, three independent article storage structures are arranged in the cabinet, and the three storage structures can be lifted, so that the internal space of the cabinet is utilized to the maximum extent, and meanwhile, the article storage space is also increased; and the lifting mechanism has two lifting modes: an automatic lifting mode and a manual lifting mode, and due to the design of the double lifting modes, the cabinet can still complete the lifting action under the condition of power failure or damage of the manual lifting structure.

The invention relates to a double-procedure gang drill cutting machine. The cutting machine comprises a worktable bracket; a worktable is arranged at the top of the worktable bracket; a Y-directionalmoving mechanism is arranged above the worktable; two Y-directional racks, transversely and symmetrically arranged in the Y-directional moving mechanism, are fixedly arranged on the two sides of the worktable bracket; an X-directional rack, transversely arranged in an X-directional moving mechanism, is fixedly arranged at the top of a cross beam in the Y-directional moving mechanism; a Z-directional moving mechanism is arranged on the loading side, near the cutting machine, of the X-directional moving mechanism; a Z-directional driving motor in the Z-directional moving mechanism is longitudinally fixed on an X-directional carriage plate in the X-directional moving mechanism; a machining device is arranged on the loading side, near the cutting machine, of a Z-directional carriage plate in the Z-directional moving mechanism; a loading auxiliary device is arranged at a loading end, near the worktable, of the top of the worktable bracket; and a pushing device is arranged on the cross beamin the Y-directional moving mechanism. The cutting machine can conveniently and quickly load and unload materials, improves the machining efficiency, and guarantees the product quality.

The invention relates to a rotary rock debris fishing tool with a replaceable spray head for a horizontal well in the petroleum and natural gas industry. The rotary rock debris fishing tool comprises an annular battery, a screw rod rotor, a screw rod, an annular motor, a fishing inner cylinder, nozzles, the spray head, a turbine, a rock debris blocking umbrella, a PLC control module and the like. According to the rotary rock debris fishing tool, the rotary motion of the motor is converted into the linear motion of the fishing inner cylinder through screw rod transmission; the screw rod turbine in the fishing inner cylinder rotates through water power, and the spray head installed at the tail end of the inner cylinder can be freely replaced according to working conditions; the multiple nozzles arranged on the spray head can impact rock debris without dead angles; and the PLC control module controls the rock debris blocking umbrella to close a cylinder opening. The rotary rock debris fishing tool has the advantages that the spray head and the nozzles can be replaced according to the working conditions, the rock debris can be fished in an all-dimensional mode, operation can be conducted for multiple times, and the rock debris can be automatically prevented from falling off during recycling.

The invention discloses a three-state beam source furnace shutter for molecular beam epitaxy. The three-state beam source furnace shutter is characterized in that a third beam source furnace protection state is added on the basis of a beam opening state and a beam closing state, and the shutter in the beam source furnace protection state can effectively prevent material fragments adsorbed on the inner wall of a cold shield from falling into a beam source furnace. The three-state beam source furnace shutter has the advantages that the source material in the beam source furnace can be protected from being polluted by material fragments, the quality of an epitaxial film is optimized, meanwhile, the stability and repeatability of evaporation beams are effectively improved, the equipment maintenance time is shortened, and the equipment production efficiency is improved.

The invention relates to a paper slitting device. The device comprises a rack, an unwinding roller, a knife roller with a knife groove, a transverse rod, a knife disc arranged on the transverse rod, amain rotating roller, an auxiliary rotating roller, a motor and a winding roller; horizontal first sliding grooves higher than the main rotating roller are formed in the two sides of the rack correspondingly, and two first sliding blocks are embedded in each first sliding groove in a sliding mode; the first sliding block is provided with a limiting rod for limiting the falling of the paper roll;the first sliding block is further provided with a vertical groove for the limiting rod to slide up and down; square annular connecting frames allowing the two limiting rods on the same side to penetrate through are arranged on the two sides of the rack correspondingly, a plurality of inclined blocks are arranged on the lower inner walls of the connecting frames, and the heights of the inclined blocks are gradually increased towards the nearest ends of the connecting frames; a plurality of vertical plates are vertically arranged on the upper inner wall of the connecting frame, and the verticalplates and the inclined blocks are vertically arranged in a staggered mode to form a sawtooth-shaped channel. According to the scheme, a paper roll is ingeniously prevented from falling off from theposition between the main rotating roller and the auxiliary rotating roller, and smooth winding of raw paper is effectively guaranteed.

The invention discloses a bridge multistage energy-absorbing guard bar. The bridge multistage energy-absorbing guard bar comprises four kinds of buffering parts which include sand bag energy-absorbingparts, elastic pulling strips, elastic parts installed on columns, torsion springs and rubber pads, and the torsion springs and the rubber pads are arranged at the bottoms of the columns; through thearrangement of the four kinds of buffering parts, the purpose of multistage energy-absorbing buffering is achieved; by prolonging the collision time of a vehicle, the collision acceleration of the vehicle is reduced, the vehicle can be prevented from both turning over and rebounding, and a good effect of protecting a driver and passengers is achieved; meanwhile, the collided guard bar can be restored under the effect of an elastic device, the possibility that the guard bar is deformed to the non-recoverable state or directly sheds is reduced, thus the guard bar can be put into use again afterbeing briefly repaired, and the cost for maintaining the bridge guard bar is reduced.

The invention relates to the technical field of wool pre-carding, and discloses a wool pre-carding device for a wool carding machine. The device comprises a pre-carding base, wherein a storage grooveis formed in the pre-carding base, a pre-carding cylinder is arranged right above the storage groove, the left end face of the pre-carding cylinder is connected with an output shaft of a first pre-carding motor, first pre-carding vertebral teeth are evenly distributed on the side wall in a pre-carding cylinder cavity, first pre-carding needles and second pre-carding needles are evenly distributedon the left end face and right end face in the pre-carding cylinder cavity, gaps are formed among the second pre-carding needles, the first pre-carding needles and second pre-carding vertebral teeth evenly distributed on the outer side wall of a pre-carding shaft, the right side face of the pre-carding shaft penetrates through the right end face of the pre-carding cylinder, extends to the outer portion of the pre-carding cylinder and is connected with an output shaft of a second pre-carding motor, and a water jet of which a water outlet end is provided with blowholes is arranged between the pre-carding cylinder and first blower fan blades. The wool pre-carding device for the wool carding machine solves the problem of low efficiency and poor effect of opening and untying tangled wool of anexisting wool pre-carding device.

The invention belongs to the technical field of sinterer equipment and sinterer waste heat power generation, and particularly relates to a smoke circulating and converting device of a sinterer dust reduction pipe. The smoke circulating and converting device comprises a sinterer big smoke way main pipe, a smoke way tail pipe, a tail-end dust reduction pipe and an electric control system, an electric pipeline valve is arranged at a position where the sinterer big smoke way main pipe is connected with the smoke way tail pipe, a smoke waste heat air extraction door is arranged on the smoke tail pipe, the tail-end dust reduction pipe is composed of a smoke dust vertical pipe, a smoke dust bypass pipe, a smoke bypass pipe, a pipeline switching device and a pipeline grating device, an electric pipeline valve, the pipeline switching device and the smoke waste heat air extraction door are all connected with the electric control system. The smoke dust vertical pipe is composed of a round vertical pipe, a round-to-square pipeline joint, a square vertical pipe, an electric air locking device I, an electric air locking device II and a manhole door. Low-temperature air in the tail dust reduction pipe does not enter a waste heat boiler any more, so that influence of cold air which leaks in is avoided and inlet smoke temperature and waste heat utilization efficiency of the waste heat boiler are improved greatly.

The invention discloses an anti-gushing and anti-scalding device for clearing blockage of a cyclone preheater of a cement kiln. The anti-gushing and anti-scalding device for clearing blockage of the cyclone preheater of the cement kiln comprises a supporting base, a baffle, a supporting column, a spring, a protection piece and a protection sleeve, one end of the supporting base is connected with the cyclone preheater, the other end of the supporting base is movably connected with one end of the protection piece, and the other end of the protection piece is connected with the protection sleeve; the supporting base is provided with a connecting hole and a counter bore, and at least two symmetrical supporting columns are distributed on the circumference of the bottom of the counter bore; the baffle is arranged in the counter bore, connected with the supporting column through a spring and suspended in the counter bore, and a first through hole is formed in the baffle. According to the anti-gushing and anti-scalding device for clearing blockage of the cyclone preheater of the cement kiln, the anti-gushing and anti-scalding device has the characteristics that an anti-blocking device can be used for protecting the cyclone preheater of the cement kiln during blocking removal, and can effectively avoid injury to operators during blocking removal, and the like.

The invention relates to the field of elevator construction, in particular to a moveable type operating platform for conducting construction in a shaftway of an elevator shaft. The moveable type operating platform is characterized in that the moveable type operating platform comprises channel steel, steel plates, steel pipes and reinforcement meshes. The channel steel of the platform is erected toa structural part and a shear wall of the elevator shaftway, so that longitudinal and horizontal supports of the operating platform are formed, the channel steel and the steel plates form an operating face of the operating platform, and the reinforcement meshes are arranged at gaps between the steel pipes and the steel plates. By adopting the moveable type operating platform, the problem that arrangement of the operating platform in the elevator shaft way is not convenient can be effectively solved, meanwhile, the top of the operating platform and beams and walls of the shaftway form a completely closed plane, sundries can be prevented from dropping out, and the site environment of safe operation of a construction elevator is ensured.

The invention belongs to the technical field of municipal engineering, and provides a municipal administration well lid moving device. A bearing plate is included. A lifting plate is arranged on the upper side of the bearing plate. A guiding assembly for providing guiding for lifting of the lifting plate is arranged on the bearing plate. The bearing plate is provided with a storage battery and anelectric telescopic rod. The bottom of the lifting plate is provided with a fixed elevating pipe and a movable elevating pipe. The fixed elevating pipe is fixed to the bottom of the lifting plate. Thelifting plate is provided with an adjusting assembly for adjusting the position of the movable elevating plate. The bearing plate is provided with a first strip-shaped opening for the movable elevating pipe to penetrate. Stop assemblies are arranged at the bottoms of the fixed elevating pipe and the movable elevating pipe. According to the municipal administration well lid moving device, a sliding block slides on a guiding sliding rod, the position of the movable elevating pipe is adjusted, accordingly the distance between the fixed elevating pipe and the movable elevating pipe is adjusted soas to adapt to well lids different in size, and the application range is enlarged.

The invention relates to the technical field of pipe-jacking construction, in particular to a pipe-jacking well opening soil body reinforcing process for a soft soil foundation, and relates to the technical field of pipe jacking construction. Soil bodies around the pipe-jacking well opening are reinforced by two ways: tamping and compaction grouting. In the tamping step, the soil bodies around a pipe jacking well opening are tamped in the advancing direction of a jacking pipe, and then a pit left after tamping is filled and leveled up with soil, then the next round of tamping is conducted, and soil filling and tamping are conducted circularly till the condition of stopping circulation is met. The method has the effect of improving the defects of long construction period, high cost and low tunneling efficiency when a pipe jacking machine goes in and out of the opening of the pipe jacking well.

The invention relates to a powder falling mechanism of a coffee machine, which is characterized in that the powder falling mechanism comprises a powder outlet base, the lower portion of the powder outlet base is concaved inwards to form a movable groove, and a sliding plate is installed in the movable groove in a sliding mode through a driving mechanism; a powder outlet is formed in one side of the movable groove in a penetrating mode, the sliding plate covers the upper portion of the powder outlet in a sliding mode, and the driving mechanism drives the sliding plate to slide to open and closethe powder outlet. The driving mechanism comprises an eccentric wheel and a driving motor connected with the eccentric wheel, the driving motor drives the eccentric wheel to rotate, the eccentric wheel is provided with an eccentric shaft deviating from the rotating center of the eccentric wheel, the eccentric shaft is clamped in a sliding groove in one side of the sliding plate, and when the driving motor drives the eccentric wheel to rotate, the eccentric shaft and the sliding groove interact to drive the sliding plate to slide. The powder falling mechanism has the beneficial effects that the powder discharging mechanism and the driving mechanism are simple in structure, high in working efficiency and low in manufacturing cost, and the market competitiveness of the coffee machine is effectively improved.

The invention discloses an automatic blanking, feeding and positioning device for automatic machining of pliers. The device comprises a bottom plate, wherein a frame is fixedly arranged on the upper surface of the bottom plate; a feeding device for transporting a plier body, a positioning device for positioning the plier body and a blanking device for placing the plier body on the feeding device are arranged on the frame; the blanking device comprises a fixing frame used for fixing the plier body; a material blocking device used for preventing the plier body from falling is arranged at the lower end of the fixing frame; and a switch device used for controlling the material blocking device to be opened and closed is arranged on the fixing frame. According to the device, different actions ofautomatic blanking, feeding, positioning and clamping can be completed under the same drive, the investment of a plurality of drive devices is avoided, the manpower and automatic investment cost is reduced, and the economic benefits are increased.