6results about How to "Reduce reserves" patented technology

The application relates to the field of workpiece production operations, and discloses a skid changing system, a scissor clamping mechanism and a flow line. The skid changing system comprises a skid assembly, a skid changing conveying line, a lifting assembly and an adjusting and positioning assembly. The skid assembly comprises multiple uniform skids with the same model and multiple non-uniform skids with different models. The skid changing conveying line can alternately input the uniform skids and the non-uniform skids. The lifting assembly can lift a workpiece carried by a previous skid input to the skid changing conveying line and place the workpiece on a next skid. The adjusting and positioning assembly can adjust and position the relative position of the lifting assembly and the skid with any model input to the skid changing conveying line. The flow line can realize collinear skid changing of workpieces with different models, reduces the investment cost of equipment and improves production efficiency.

This utility model discloses a low-power power control board for electronic devices, including a main board and a sub-board. The main board has a recessed portion below it, with a limiting hook on one side of the recessed portion. Pressing posts are inserted into both sides of the sub-board, with a ring stop block in the middle of each pressing post. A spring is provided between one side of the ring stop block and the inner wall of the inner ring groove of the sub-board. A positioning post is provided in a placement portion within the sub-board, with a rotating positioning hook block sleeved around its middle. A pin is located below the positioning hook block, with both ends of the pin inserted into two driving blocks at the inner end of the pressing post. A conductive sheet is provided in a slot portion of the main board, and a post and conductive block are provided on top of the sub-board. By installing replaceable sub-boards below the main board, the power control board only needs to be replaced with different models of sub-boards during operation, reducing the number of spare power control boards and making it easy to carry.

The application discloses an environment-friendly recycling treatment equipment for waste concrete, which comprises a vibrating feeder, a coarse crushing unit, a fine crushing unit, a vibrating screening machine and a plurality of belt lifting conveyors. The plurality of belt lifting conveyors are respectively arranged between the vibrating feeder and the coarse crushing unit, between the coarse crushing unit and the fine crushing unit, and between the fine crushing unit and the vibrating screening machine. The coarse crushing unit is a jaw crusher. The hydraulic floating gap adjusting structure can realize the elastic yielding structure with adjustable yielding force, controllable stroke, automatic reset and no influence on normal crushing granularity, can ensure that the hard objects can smoothly pass through, will not be stuck and broken, and is suitable for the treatment of waste concrete. In the modular movable tooth roller structure, the tooth plate can change the installation angle during installation. A single tooth plate can realize two-state installation. When only the installation angle of the tooth plate is changed without changing the tooth shape, other tooth plates do not need to be changed, and only the installation state needs to be changed.

The utility model belongs to the technical field of die-casting dies, and particularly relates to a universal rack die-casting die convenient for die replacement, which comprises a fixed rack, a movable rack and an ejector pin, a detachable lower mold core and a detachable upper mold core are respectively arranged in the fixed rack and the movable rack; pin rods are transversely mounted in the fixed rack and the movable rack in a sliding manner, plug rods are separately connected to the end parts of the pin rods, and a frame connecting plate is connected between the lower mold core and the upper mold core and between the outer walls of the lower mold core and the upper mold core; the plug rod is divided into a thin shaft body and a thick shaft body. The die core can be directly taken out for cooling after die-casting operation, so that the machine frame shell of the die continues to be subjected to die-casting operation, the die is suitable for continuous production operation, different die cores can be directly replaced in the mode, and therefore the die is suitable for die-casting operation of different products.

The present application provides a kind of mine no ventilation working face mining system and method, it is related to coal mining technical field, the mining system includes L type working face;Coal winning machine, be arranged in L type working face, for completing coal wall cutting, roof support and coal transportation;Air door, be arranged in the position of transport drift near with auxiliary transport roadway junction, for closing the entrance of L type working face, to form closed space;Low temperature nitrogen injection system, be arranged in auxiliary transport roadway, its output end passes through air door, for the nitrogen gas that is transported to L type working face after cooling treatment, make the oxygen concentration in L type working face drop to below 5%, temperature is maintained at 20~25 ℃, and keep positive pressure state;Exhaust system, be arranged in return air roadway, its input end passes through air door, for the gas of L type working face is discharged.Compared with the traditional ventilation system, the present application system realizes the near zero carbon emission of coal mining process, can reduce more than 90% of gas emission and more than 95% of dust emission.

This utility model discloses a positioning fixture for bearing manufacturing and processing, including a base and a movable jaw and a fixed jaw respectively disposed on the base. The movable jaw and the fixed jaw are arranged opposite to each other to form a workpiece clamping space. The base is provided with a driving component that can drive the movable jaw to move closer to or away from the fixed jaw. The movable jaw includes a slider and a first clamping block rotatably disposed on the slider. The first clamping block has a plurality of first arc-shaped clamping surfaces evenly distributed along its circumference, and the plurality of first arc-shaped clamping surfaces can protrude outward one side of the slider as the first clamping block rotates. The fixed jaw includes a second clamping block rotatably disposed on the base. The second clamping block has a plurality of second arc-shaped clamping surfaces evenly distributed along its circumference, and the plurality of second arc-shaped clamping surfaces are arranged in a one-to-one correspondence with the plurality of first arc-shaped clamping surfaces. The base is provided with a locking component that can simultaneously lock the rotation of the first clamping block and the second clamping block.