36results about How to "Achieve a tight fit" patented technology

The invention provides a conveniently used mechanical sealing element. The conveniently used mechanical sealing element comprises a pipeline and two attached discs, wherein threaded holes which penetrate through two end surfaces of the discs and are screwed with the pipeline are formed in the two discs, annular plastic pieces are fixedly installed on the opposite sides of one disc, and round clamping grooves matched with the annular plastic pieces are formed in the other disc. A plug pin is fixedly installed on the opposite side of one of the two discs, a slot matched with the plug pin is formed in the other disc, the bottom of the slot is communicated with a rectangular clamping groove, the aperture of the rectangular clamping groove is larger than that of the slot, and an elastic telescopic piece matched with the rectangular clamping groove is arranged on the plug pin. As the pipeline is screwed in the threaded hole in the disc, the plug pin is inserted into the slot, and the aperture of the rectangular clamping groove is larger than that of the slot, the elastic telescopic piece can be clamped in the rectangular clamping groove.

The invention provides a supporting device for a water conservancy pipeline. The supporting device for the water conservancy pipeline comprises a base, two movable supporting arms, a reinforcing partand a rotating part, wherein an accommodating cavity is formed inside the base; the rotating part is arranged inside the accommodating cavity, and the two movable supporting arms are symmetrically arranged on the two sides of the top of the base; the reinforcing part and the two movable supporting arms are combined to form a through groove used for accommodating the water conservancy pipeline; rotating blocks are arranged on the two sides of the water conservancy pipeline, and each rotating block is abutted against the corresponding movable supporting arm; the rotating part comprises a rotating shaft, transmission chains, a worm and a driving motor; one end of the rotating shaft is provided with driven gears, and the other end of the rotating shaft is provided with a driving gear; the opening end parts of the transmission chains are fixedly connected with corresponding rotating blocks of the transmission chains, and the transmission chains mesh with the driven gears; the worm is rotatably arranged inside the accommodating cavity and meshes with the driving gear; and the driving motor can drive the worm to rotate. According to the device, the water conservancy pipeline is rotationally adjusted through the rotating part, so that the joint is matched, and the assembling efficiency and the mounting stability are improved.

The invention discloses a processing method of a tool apron with a locking device, belonging to the technical field of tool apron processing. The method comprises the following steps: (1) the preparation of raw materials of the tool apron; (2) the annealing treatment of forging blank, wherein the annealing temperature is 780-840 DEG C, and the annealing time is 4-6 hours; (3) the rough processing of forging blank; (4) the heat treatment of the tool apron: heating to 830 DEG C within 20 minutes, quenching after 45 minutes of heat preservation, wherein a quenching medium is No. 2 quenching oil, and then tempering for two times under the temperature of 450-480 DEG C; and (5) the deep processing of the tool apron: cutting gaps and circular arc segments with a wire cutting method, and blackening the tool apron. In the processing, the locking device is formed, the tool apron can still be firmly locked on a cutter shaft not to loosen when the cutter shaft rotates at a high speed, the requirement that the face runout value of the tool apron is controlled within 0.002 mm is achieved, and the demand that users cut metal plates such as high-precision aluminum plates, stainless steel plates, silicon steel plates and the like is met.

The invention belongs to the field of road construction and discloses a novel multifunctional viaduct sound insulation device and method. A sound insulation board is arranged; a fixing frame is weldedto the portion, below the back side of the sound insulation board, of the front side of the sound insulation plate, and tightening bolts are in threaded connection with the fixing frame; the fixing frame is provided with a first retractable rod and a second retractable rod, an outer barrel of each retractable rod is provided with through holes, the inner rod of each retractable rod is provided with a groove, and a spring is welded to each groove; the springs are welded to protrusive blocks, and the protrusive blocks are inserted into the through holes. The front side of the sound insulation board is provided with sound absorption holes, and the portion between the front side of the sound insulation board and the back side of the sound insulation board is filled with a glass sponge. According to the device and the method, by arranging the first retractable rod and the second retractable rod, the fitting degree with side plates of a bridge can be improved, the fixation firmness of the sound insulation board is enhanced, and the situation is avoided that since a traditional viaduct sound insulation device is fixed, there is a gap between the traditional viaduct sound insulation device and a viaduct, correspondingly a sound insulation board shakes under severe weather, the sound insulation effect declines, and meanwhile, a certain danger exists.

The invention discloses an anti-blocking scriber for a test field. The anti-blocking scriber comprises an ash bucket and upright rods, wherein totally two upright rods are arranged; an ash outlet is formed in the bottom end of the ash bucket; the ash bucket is connected with the upright rods by virtue of a reciprocating mechanism; an anti-blocking mechanism is arranged on the ash bucket and comprises a digging rope; one end of the digging rope is connected with the reciprocating mechanism; the other end of the digging rope penetrates through the inner cavity of the ash bucket so as to extend to the ash outlet and is connected with an ejector; the ejector is matched with the ash outlet; the ejector comprises a tip; a striking rod is connected onto the digging rope; a first connecting rod ishinged onto the striking rod; and the first connecting rod is connected with the outer wall of the ash bucket. By virtue of dual actions of ejecting and shaking, blanking normality is ensured, the operation is convenient and rapid, and time and labor can be saved. Meanwhile, the operation of opening and closing the ash outlet at an optional position is realized in the scribing process, the scriber is multifunctional, and the working efficiency is improved.

The invention discloses a method and equipment for preparing fire-resistant and anti-corrosive C type steel, and belongs to the technical field of anti-corrosive building material. The equipment comprises a bonding hole punching machine, a forming machine and an extrusion cladding machine arranged in sequence from front to back; the equipment is characterized in that an extrusion die is mounted inside a package molding machine, a C type steel inlet is arranged on the front end of the extrusion die, a C type steel outlet is arranged on the rear end of the extrusion die, the C type steel outlet is larger than the C type steel inlet, a cladding chamber connecting the C type steel inlet and the C type steel outlet is arranged inside the extrusion die, a flow pass connecting the cladding chamber is arranged in the side wall of cladding chamber, the other end of the flow pass is communicated with a filling port, and the filling port is connected with a plasticizing extruder. When the C type steel is extruded and cladded, the cladded material in a melted state is extruded to the upper surface and the lower surface of the C type steel through the flow pass, then through being connected by the bonding hole, the complete set of equipment enables the cladding layer to form a whole with multiple connection points, which reinforces the robustness, thereby the lasting anti-corrosive ability of the C type steel is heightened.

An optical adjusting frame capable of slowing down drifting comprises a front plate, a base plate, a lead screw and a nut. The frame is characterized in that the screw rod is cylindrical, external threads are arranged on the surface of the screw rod, one end of the screw rod is an inner hexagonal groove end, and the other end of the screw rod is a spherical tip. One end of the nut is a cylindricalsurface, the other end of the nut is provided with a step, an internal thread is arranged in the nut and matched with an external thread of the lead screw, the cylindrical surface is provided with axial grooves which are evenly distributed in the circumferential direction, and the axial grooves penetrate through the whole length of the internal thread. The nut is fixed to the base plate, the leadscrew is screwed into the nut in a spiral fit mode, and the spherical tip end of the lead screw abuts against the front plate. The invention aims to improve the non-rigid contact piston effect causedby filling excessive lubricating grease on the pressed side of the screw-thread fit screw tooth surface, thereby improving the position stability of the optical adjustment frame. The frame is simplein structure, low in nut machining requirement, gapless in transmission, good in long-term stability and suitable for precise micro-adjustment of the angle and the position of an optical element.

The invention belongs to the technical field of coal mining, and in particular relates to a support device and method for an anti-collapse hole in a soft coal seam that is prone to instability, the device includes a plurality of support units, and the support unit includes a protection mechanism arranged in the borehole and a support mechanism for supporting the protection mechanism, the protection mechanism includes an upper support plate, a lower support plate symmetrically arranged with the upper support plate, and a plurality of composite A support column, the support mechanism includes a plurality of flexible airbags, and the plurality of flexible airbags are communicated through a ventilation pipeline. The use method of the device includes five steps: connecting a support mechanism, connecting a protection mechanism, pushing into a drill hole, connecting an air pipe and ventilating, and removing the air pipe. In the present invention, a flexible air bag is arranged between the upper and lower support plates, the upper and lower support plates are stretched through the ventilation of the flexible air bag, and the upper and lower support plates are supported by a composite support column.