46results about How to "Large room for adjustment" patented technology

The invention provides a cantilever beam type vibration absorber with adjustable frequency. The cantilever beam type vibration absorber comprises a base, a cantilever beam and a mass disc, the lower end of the base is fixed to vibration equipment, through holes are formed in the upper end of the base and the mass disc, internal threads are arranged in the through holes, external threads matched with the through holes are arranged on the cantilever beam, the cantilever beam is arranged in the through hole of the base and the through hole of the mass disc through the external threads, fixed nuts are arranged at the two ends of the through hole of the base and fix the position of the cantilever beam and the base, adjusting nuts are arranged at the two ends of the through hole of the mass disc and limit the relative position of the cantilever beam and the mass disc, the adjusting nuts are adjustable, that is, the relative position of the mass disc and the cantilever beam is adjustable. The vibration absorption frequency of the vibration absorber can be flexibly adjusted, and the adjustable scope is wide. Parts are easy to machine and replace. Compared with an electromagnetic type unable vibration absorber and an electrodynamic type tunable vibration absorber, the electromagnetic leakage phenomenon is avoided. The cantilever beam type vibration absorber is simple in structure, stable in work and easy to mount.

The invention discloses a pilot production wellhead platform. The pilot production wellhead platform comprises a topside module, a plurality of platform leg pillars, and a plurality of steel pile foundations, wherein the quantity of the platform leg pillars and the quantity of the steel pile foundations are equal, the topside module comprises a main deck, a production deck and a well drilling deck which are sequentially arranged from the bottom to top; the upper ends of the platform leg pillars are connected with the main deck, the steel pile foundations penetrate through the platform leg pillars and extend out of the platform leg pillars, Christmas trees are arranged on the production deck, and the Christmas trees are connected with drill conductors; after penetrating through the main deck, thedrill conductors extend downwards continuously; a living building and a helicopter deck are arranged on the right side of the well drilling deck, and the helicopter deck is arranged at the top of the living building; a passage and a slide track used for the sliding of a drilling machine or a workover rig are reserved on the left side of the well drilling deck. According to the pilot production wellhead platform, complex oil pools with less development experience can be exploited efficiently and quickly by usingless engineering investment cost, and a relatively large adjustment scopeis provided in the process of exploiting; meanwhile, the oil field development risk of the complex oil pools can be controlled effectively, so that the pilot production wellhead platform has a wide application prospect in development of such oil fields.

The invention provides a modified rubber masterbatch and its preparation method, a polybutadiene rubber composition and its preparation method and its vulcanized rubber. The modified rubber masterbatch includes uncrosslinked rubber and nitrile rubber particles with a cross-linked structure dispersed therein; the nitrile rubber particles have an average particle size of 50 to 200 nm and a gel content of 60% by weight or Higher; the uncrosslinked rubber is styrene-butadiene rubber; the weight ratio of the crosslinked nitrile rubber particles to the uncrosslinked rubber is greater than 20:80 and less than or equal to 80:20. The polybutadiene rubber composition includes the blended modified rubber masterbatch and polybutadiene rubber; based on 100 parts by weight of polybutadiene rubber, the modified rubber component is 1 to 70 parts. share. The polybutadiene rubber composition can significantly improve the wet slip performance and rolling resistance of the vulcanized rubber at the same time, while maintaining its good wear resistance, and can be used to prepare high-performance automobile tread rubber.

The invention relates to a low-clearance tunnel cantilever positioning device which is formed by an arch flat cantilever 1, a positioning tube 2, an inclined cantilever 3, a catenary seat 6, a positioning support 7 and a limiting positioner 8. The positioning tube 2 is fixed at the lower part of the horizontal section of the arch flat cantilever 1; the upper end of the inclined cantilever 3 is hinged to the lower part of the inner end of the positioning tube 2; the upper end of the positioning support 7 is arranged on the positioning tube 2; the limiting positioner 8 is arranged at the lower end of the positioning support 7; and the catenary seat 6 is arranged on the horizontal section of the arch flat cantilever 1. According to the invention, the inclined arm section of the arch flat cantilever is clung to the wall of a tunnel to be mounted, so that the installation and fixing point of the flat cantilever is shifted down, and thus, the cantilever is integrally close to the wall of the tunnel to the greatest degree along the horizontal direction. The low-clearance tunnel cantilever positioning device has a compact structure, saves the installation space, completely meets the requirement of a low-clearance tunnel for the small-space installation and can meet the boundary requirement whether on the straight line section or the curved section of the low-clearance tunnel.

The invention provides an emulsion polymerized styrene-butadiene rubber composition, a preparation method thereof, and a vulcanized rubber thereof. The emulsion polymerized styrene-butadiene rubber composition comprises blended modified rubber component and emulsion polymerized styrene-butadiene rubber. Calculated according to the weight of emulsion polymerized styrene-butadiene rubber as 100 parts, the composition comprises 1-70 parts of the modified rubber component. The modified rubber component comprises uncrosslinked rubber and rubber particles with crosslinked structures, which are dispersed in the uncrosslinked rubber. The rubber particles with crosslinked structures are nitrile rubber particles with an average particle size of 50-200nm and a gel content of 60wt% or higher. The uncrosslinked rubber is styrene-butadiene rubber. A weight ratio of the rubber particles with crosslinked structures to the uncrosslinked rubber is 80:20-30:70. The rolling resistance, wet skid performance and wear resistance of the vulcanized rubber of the emulsion styrene-butadiene rubber composition can be improved. The vulcanized rubber can be used for preparing high-efficiency automobile tread rubber.

The invention belongs to the technical field of numerical control machine tools and relates to a numerical control full-automatic machine tool special for cams. A horizontal guide rail arranged on the front side of a base is provided with a workpiece fixture capable of moving along the horizontal guide rail; a longitudinal guide rail arranged on the back side of the base is provided with a headstock; a vertical guide rail arranged on the front side of the headstock is provided with a head seat; a cantilever is fixedly arranged on the lower side of a vertical shaft which is vertically arranged on the front side of the head seat; a horizontal guide rail arranged on the cantilever is provided with a motor; an output shaft of the motor is provided with a cutter; all kinematic pairs are driven to move by motors; and a controller controls all motors to sequentially act. The numerical control full-automatic machine tool special for cams has the advantages that a numerical control technology and three-dimensional machining are adopted, the machined cams have smooth and continuous moving tracks and arcs, the yield is high, the production efficiency is high, the production cost is low, and the machine tool is suitable for machining cams with various complex surfaces and tracks.

An electrothermal water jug thermostat has two parts of a coupling assembly and a main body assembly. The coupling assembly has a casing, a wiring lug mounted in the casing, a ground lug, a movable contact spring, and an L-N pole contact piece, the movable contact spring being fitted with a support. The main body assembly has a main body, a temperature control strip mounted in the main body, a jump bar mounted on the main body, an L-N pole piece and a ground lug. The temperature control strip has a low temperature strip fitted with a contact of the jump bar and a high temperature strip mounted on a base plate. The base plate is connected with upside of the main body, and is in contact with the ground lug of the thermostat. The ground lug connects the L-N pole wiring lug of the thermostat, and the L-N pole wiring lug is fitted with the L-N pole piece. The main body assembly also has an L pole copper coil and an N pole copper coil mounted at inner-outer wall of a contact pin, an L-N pole contact piece and a push rod mounted in the contact pin jack wall of the casing, a movable contact spring in contact with the push rod upward, and a small grounded shaft mounted in the cylindrical contact pin and fitted with the ground lug.

The invention discloses a stone material aluminum honeycomb composite slab suspended ceiling construction method based on T-shaped and Z-shaped hanging parts. A construction stone material aluminum honeycomb composite slab suspended ceiling comprises multiple columns of stone material aluminum honeycomb composite slabs, a column of T-shaped hanging parts is arranged between every two adjacent columns of stone material aluminum honeycomb composite slabs, each T-shaped hanging part is clamped between left and right Z-shaped hanging parts, a column of outer side hanging parts is arranged on the outer side of each column of outer side compound slabs, and a column of pre-embedded bolts for fixing outer side hanging parts or Z-shaped hanging parts is arranged on the left and right sides of each stone material aluminum honeycomb composite slab respectively. The stone material aluminum honeycomb composite slab suspended ceiling construction method comprises the steps of 1 suspended ceiling keel installation, 2 T-shaped part installation, 3, stone material aluminum honeycomb composite slab installation and 4 joint filling treatment. The stone material aluminum honeycomb composite slab suspended ceiling construction method includes simple steps, is reasonable in design, simple and convenient to construct, high in working efficiency and good in construction effect, the stone material aluminum honeycomb composite slab suspended ceiling construction process can be simply, conveniently and rapidly completed, the input cost is low, and the construction quality is easy to ensure.