60results about How to "Block fall" patented technology

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 a paper cutting device, which comprises a frame, an unwinding roller, a knife roller with knife grooves, a cross bar, a knife disc arranged on the cross bar, a main rotating roller, an auxiliary rotating roller, a motor and a winding machine. Roller, both sides of the frame are provided with a horizontal first chute higher than the main rotating roller, and two first sliders are embedded in the first chute, and the first slider is equipped with a device to limit the falling of the paper roll. the limit rod; the first slider also has a vertical slot for the limit rod to slide up and down; both sides of the frame are provided with a square ring connecting frame for the two limit rods on the same side to pass through. The lower inner wall of the lower inner wall is provided with a plurality of inclined blocks, and the height of the inclined blocks gradually increases toward the nearest end of the connecting frame; the upper inner wall of the connecting frame is erected with a plurality of vertical plates, and the vertical plates and inclined blocks are arranged alternately up and down to form a zigzag channel. This solution not only skillfully prevents the paper roll from falling between the main rotating roller and the auxiliary rotating roller, but also effectively ensures the smooth winding of the base paper.

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 discloses a leakage-proof physical similarity simulation experiment frame and belongs to the field of energy engineering. The leakage-proof physical similarity simulation experiment frame is characterized by comprising an experiment frame, an upper baffle plate, a lower baffle plate and a middle baffle plate, wherein screw holes are formed in the left end and the right end of the experiment frame; a rectangular transparent baffle plate of an upper baffle plate limiting device is mounted at the lower end of the upper baffle plate and fixed on the front and rear sides of the experiment frame; a rectangular transparent baffle plate of a lower baffle plate limiting device is mounted at the upper end of the lower baffle plate and fixed on the front and rear sides of the experiment frame; the middle baffle plate is located between the upper baffle plate and the lower baffle plate and is limited in the horizontal direction by the upper baffle plate limiting device and the lower baffle plate limiting device to move left and right, thereby being capable of moving forwards with advancing of the working face, and collapsed rocks in a goaf are prevented from falling into the experiment frame. The experiment frame can effectively prevent simulated rock blocks from leaking out of the experiment frame, so that an experiment effect is improved, a model is prevented from toppling over, and the leakage-proof physical similarity simulation experiment frame is simple to use and low in experiment cost.