46results about How to "Reduce lifting resistance" patented technology

The invention relates to a liftable office table convenient for wiring management, which is provided with a desktop, two table legs and a rocking rod, each table leg comprises a cross rod, and a first vertical rod and a second vertical rod which are sleeved with each other, an H-shaped support frame is arranged below the desktop and comprises a first frame and two second frames, the rocking rod drives screws in the first vertical rods to rotate through screws in the support frame and three transmission gearboxes, further the lifting of the desktop is realized under the matching of screw nuts at the upper ends of screw sleeves in the second vertical rods, guiding ring bodies are further arranged between the first vertical rods and the second vertical rods, scales are marked on the first vertical rods, and wire grooves are arranged outside the second vertical rods. The office table disclosed by the invention has the advantages that the height of the office table is convenient and flexible to adjust according to the requirement of a user, and assembly, disassembly and wiring management are facilitated.

The invention discloses an automobile rear door triangular block assembly, and relates to the technical field of automobile spare part manufacturing. The automobile rear door triangular block assembly comprises a rear door rear upper guide rail arranged between a triangular block outer plate and a triangular block inner plate, reinforcing rib plates are arranged on the triangular block outer plate and the triangular block inner plate respectively, clamping positions and clamping hooks are arranged on the reinforcing rib plates of the triangular block outer plate and the triangular block inner plate respectively, the clamping positions are paired with the clamping hooks, and the triangular block outer plate and the triangular block inner plate are connected into a whole through the clamping positions and the clamping hooks. Compared with the prior art, the automobile rear door triangular block assembly is simple in structure and capable of solving the problems that an existing rear door triangular block assembly is high in cost, difficult to assemble and poor in fit precision, fit clearance surface differences between the automobile rear door triangular block assembly and a rear automobile door window frame and glass are poor, natural beauty of transition of peripheral parts is influenced, rear door glass is difficult to assemble, and lifting resistance is large.

The invention relates to the technical field of well drilling, in particular to a percussion hammer. The percussion hammer comprises a hammer head and multiple first hammer teeth. The hammer head is provided with a hammer face used for hammering. The first hammer teeth are arranged on the hammer face in a manner of protruding towards a well bottom. The first hammer teeth are divided into multiple sets in the circumferential direction around the center of the hammer face. Each set of first hammer teeth is distributed in the radial direction from the center. The radial distance from the first hammer teeth in each set to the center is located between the radial distances from the two radially-adjacent first hammer teeth in the circumferentially-adjacent sets to the center. The radial distance from any two radially-adjacent first hammer teeth in each set to the center corresponds to the radial distance from one first hammer tooth in the circumferentially-adjacent sets to the center. The hammering influence range of each first hammer tooth partially coincides with the hammering influence range of the two radially-adjacent first hammer teeth in the circumferentially-adjacent sets. According to the percussion hammer, a hammered well bottom face is leveler, and the hammering efficiency is higher.

The invention relates to a floating cylinder type liquid level indicating device. A supporting plate is arranged on a container, two pulleys are installed on the horizontal line of the supporting plate, one end of a connecting line is connected to a floating cylinder arranged in the container, the other end of the connecting line surrounds the steel pulleys, and is connected with a liquid level indicating block, and a liquid level ruler is installed on the outer wall of the container or is marked on the outer wall of the container in an engraving mode. The floating cylinder is composed of a cylinder body and a cylinder cover, wherein the cylinder body and the cylinder cover are connected through threads or a flange in a sealing mode, the core portion of each pulley is provided with a rolling bearing, and the inner race of each rolling bearing is fixed on a supporting shaft of the supporting plate. The connecting line is nylon thread, and the liquid level indicating block is an isosceles triangle. Scale marks of the liquid level ruler are drawn with fluorescent pigment so that a user can read the value of the liquid level at night. Due to the fact that a detachable structure is adopted by the floating cylinder of the floating cylinder type liquid level indicating device, the weight of the floating cylinder can be conveniently adjusted, and the floating cylinder type liquid level indicating device is applicable to liquid level indication of liquid with different specific gravity. Due to the fact that the rolling bearings are installed on the pulleys of the floating cylinder type liquid level indicating device, resistance of rotation is low, and the floating cylinder type liquid level indicating device is high in sensitivity.

The invention relates to a longitudinal and circumferential seam welding device for a large pressure container barrel, and belongs to the technical field of welding. The stability of a cantilever is improved, the starting resistance of a lifting platform is reduced, and fine adjustment of a welding gun is facilitated, so that the welding positioning is accurate. An automatic wire feeding welding machine comprises a wire feeding mechanism and a welding gun fixing mechanism; a sliding lifting platform comprises a sliding platform, a cantilever support frame, the lifting platform and a transversedriving mechanism, wherein the sliding platform is fixedly connected to the cantilever support frame, one side of the cantilever support frame is connected to the lifting platform, the transverse driving mechanism is fixed on the lifting platform, and the transverse driving mechanism is fixedly connected to the welding gun fixing mechanism; a roller frame is fixed below the lifting platform; anda first guide mechanism is arranged between the cantilever support frame and the lifting platform, the first guide mechanism comprises guide rods and guide wheels, the guide wheels are fixed on the two sides of the lifting platform, and the guide rods matching the guide wheels are fixed on the cantilever support frame.

The invention provides a cast-in-place pile casing device capable of reducing the lifting resistance. The cast-in-place pile casing device comprises a steel cylinder, a lifting hanging lug, parting strips attached to the steel cylinder, and an expansion bag between the parting strips. By means of the cast-in-place pile casing, the lifting resistance can be reduced, pressure balance of soil on theside wall is achieved through pressure, and foundation stabilization is facilitated; according to the cast-in-place pile casing, the hole forming construction quality of a cast-in-place pile foundation is easily guaranteed, and the design requirement can be better met; the cast-in-place pile casing is simple in structure, and under the action of large lifting force or vibration, the casing is notprone to deformation, and can be reused; the cast-in-place pile casing can counteract stress relaxation of the hole wall, and hole wall stabilization is facilitated; compared with the rigid contact mode of the pile casing and foundation soil under the condition of no expansion bag, the expansion bag is pressurized to form the flexible interface contact of the pile casing and the foundation soil, the stress concentration and the mechanical embedding and fixing effect of the interface are reduced, and the pile casing can be pulled out easily.

According to the invention, a landing bearing for a vacuum pump comprises a rotor ball race and a coaxial stator ball race with rolling elements placed between them, housed one after another and rolling on respective rolling tracks of the rotor and stator ball races. The rolling elements comprise a succession of rolling elements having outside surfaces made of zirconium dioxide. This reduces the resistance of the landing bearing to acceleration, while nevertheless providing good resistance to chemical attacks from process gases and plasmas.

The invention provides a device for measuring a casing diameter. The device comprises a calculating module, a casing measurement groove, and a casing inflation device. The casing measurement groove can be put into a casing. A transverse dimension of the casing measurement groove is not less than the transverse dimension of the expanded casing in the groove, and a vertical dimension is less than the vertical dimension of the expanded casing in the groove. A top of the casing measurement groove is provided with a diameter reflecting device capable of moving up and down. The casing inflation device is connected to an inner cavity of the casing in the casing measurement groove. The calculating module stores a height of the casing measurement groove. When the casing inflation device fills a working medium into the casing in the groove at preset pressure so as to expand the casing and push the diameter reflecting device to rise, the calculation module can calculate the diameter of the casingat the preset pressure according to a rising distance of the diameter reflecting device and the height of the measurement groove. In the invention, the diameter of the casing after watering can be conveniently measured.

An efficient floating-aid lifting liquid pumping device having a large capacity and a high head, the device comprising a frame (1), a water storage tank (8), a pump body device, a pump core device and a lifting device; the pump body device comprises a water drawing trap (2), a pumping valve device (4), a water draining trap (3) and a high-level water tank (11); the water drawing trap (2) is provided with a buffering and boosting device (35) at a bottom portion thereof; the water draining trap (3) is provided with a floating-aid trap (12) outside in communication with and cooperating with the high-level water tank (11); the floating-aid trap (12) is provided with a water draining pipe (23) at a bottom portion thereof, and is provided with a floating-aid chamber (14) therein; the floating-aid chamber (14) is connected to a hoist roller (15) of the lifting device via a floating-aid rope (13); the pump core device comprises a piston chamber (5) and a counterweight chamber (6) above the piston chamber (5); and the piston chamber (5) is sealed from and movably fitted to the pumping valve device (4) via a floating sealing ring (7). The pumping device draws or drains water based on a space occupation ratio of the buoyancy balance-type piston chamber, and reduces a lifting resistance to the pump core device and energy consumption of the lifting device by using the floating-aid chamber of the floating-aid trap to drive the counterweight chamber to float up together via the lifting device, thus effectively lifting water to a position having high potential energy, and delivering a large volume of water into a water consuming device or a power conversion device.

The invention provides an oil-displacing discharge aiding agent as well as a preparation method and application thereof. The preparation method comprises the steps of S1, carrying out ring-opening reaction on coniferyl alcohol, ethylene oxide and a first solvent under an alkaline condition to obtain a product system containing a ring-opening compound; S2, carrying out sulfonation reaction on the product system containing the ring-opening compound, SO3 and a second solvent to obtain a sulfonate compound; and S3, mixing the sulfonate compound and a surface active substance to obtain the oil-displacing discharge aiding agent, wherein the surface active substance is a mixture of a fluorocarbon surfactant and ammonium bicarbonate, and the ring-opening compound and the sulfonate compound respectively have structural formulas shown in the description, and M < + > is a monovalent cation. The method is simple, low in cost and remarkable in effect of solving the problem that the multi-cycle steam huff and puff harvesting effect becomes poor.

The invention discloses an automobile rear door triangular block assembly, and relates to the technical field of automobile spare part manufacturing. The automobile rear door triangular block assembly comprises a rear door rear upper guide rail arranged between a triangular block outer plate and a triangular block inner plate, reinforcing rib plates are arranged on the triangular block outer plate and the triangular block inner plate respectively, clamping positions and clamping hooks are arranged on the reinforcing rib plates of the triangular block outer plate and the triangular block inner plate respectively, the clamping positions are paired with the clamping hooks, and the triangular block outer plate and the triangular block inner plate are connected into a whole through the clamping positions and the clamping hooks. Compared with the prior art, the automobile rear door triangular block assembly is simple in structure and capable of solving the problems that an existing rear door triangular block assembly is high in cost, difficult to assemble and poor in fit precision, fit clearance surface differences between the automobile rear door triangular block assembly and a rear automobile door window frame and glass are poor, natural beauty of transition of peripheral parts is influenced, rear door glass is difficult to assemble, and lifting resistance is large.

The invention relates to a lifting type self-controlled aeration system with multiple groups of rails. The lifting type self-controlled aeration system comprises an aeration tank and is characterizedin that measurement and control components, aeration components and rail components are arranged in the aeration tank, wherein the aeration components and the rail components form rail lifting type aeration units; the rail components comprise rolling wheel combined brackets and guide rail components; two ends of each of a plurality of rolling wheel combined brackets are sealed and are fixedly connected with rolling wheels; the rolling wheels roll along the guide rail components; the rolling wheel combined brackets are connected with the aeration components; two side walls of the aeration tankare symmetrically connected with lifting tool trolleys; the lifting tool trolleys are connected with the rolling wheel combined brackets through flexible dragging ropes wound on the lifting tool trolleys and the flexible dragging ropes are used for driving the rolling wheel combined brackets to slide up or down along the guide rail components; the measurement and control components are connected with the aeration components. The lifting type self-controlled aeration system with multiple groups of rails has the beneficial effects that the rail lifting type aeration units are driven to achieve non-stop operation of the aeration tank; the measurement and control components are used for achieving quantitative and automatic aeration control, so that the aeration distribution is more uniform.