30results about How to "Increase axial tension" patented technology

An improved system for handling delicate linear media and in particular to a method and apparatus for winding delicate linear media such as superconducting wire or tape or optical fibers onto a spool. A combination of direct closed loop control and media routing design facilitates the handling of the delicate media without causing damage. The axial tension in the linear media may be closely controlled during winding by means of feedback control loop using tension measurements to control the rotation speeds of the wind-from and wind-to spools. Further, during winding, the delicate linear media is only exposed to large radius bends with no reverse bending. Finally, output devices and features, commercial or otherwise, made possible by delicate linear media handling are revealed. This includes advanced SC devices and features.

The invention provides a building foundation pit internal and external supporting structure. The building foundation pit internal and external supporting structure comprises multiple anchor rods, oneends of the multiple anchor rods are fixed in a rock-soil body, and the other ends of the multiple anchor rods are fixed on a H-shaped supporting frame; the multiple anchor rods are divided into two rows, and the two rows of anchor rods and the rock-soil body are arranged in an isosceles triangle; the upper portion and the middle portion of the H-shaped supporting frame are fixedly connected withsupporting piles arranged on the rock-soil body through upper pressing rods and lower pressing rods correspondingly; and the H-shaped supporting frame is further connected with the supporting piles through supporting rods. According to the building foundation pit internal and external supporting structure, the problems that a foundation pit supporting structure cannot be repeatedly disassembled and utilized at the present stage, so that the resource utilization rate is declined to a certain extent, and saving of the construction cost is not facilitated are solved; and in the case of the building foundation pit internal and external supporting structure, the structure is fast to construct, the construction period is short, the device is effectively protected, the use amount of the anchor rods is reduced, the raw materials are saved, and the project cost is reduced.

The invention relates to a reinforcement anchor rod which comprises an anchor rod body, wherein a thread tightly meshed with a rock mass is formed on the outer side surface of the anchor rod body; an axial grouting channel for grouting slurry and enabling the slurry to flow into a drilled hole of the drilled rock mass is formed in the anchor rod body; a stop plug for stopping the slurry in the drilled hole is arranged on the anchor rod body. The invention also relates to a rock mass reinforcement method applying the anchor rod. The rock mass reinforcement method comprises the steps of respectively punching the anchor rods into intersections of cracks of the rock mass and the tail ends of all the cracks, extracting air from the anchor rods at the intersections of the cracks, grouting the slurry into anchor rods at the tail ends of the cracks, and respectively grouting the slurry into rock holes in which the anchor rod bodies are positioned after the cracks are filled with the slurry so as to reinforce the whole rock mass into a whole.

The invention provides a method for enhancing the rivet-free connection strength of a steel-aluminum double-metal sheet through oxidation treatment. The method comprises the steps that: original oxides and oil stains on to-be-compounded surfaces of a steel plate and an aluminum plate are cleaned; the to-be-compounded surface of the steel plate is subjected to oxidation treatment; the size of a punch and the size of a female die of a die are selected; and rivet-free connection is carried out, a pressurization stage and a pressure maintaining stage are completed, and demolding is performed to obtain a steel-aluminum rivet-free connection joint. Before the rivet-free connection, the to-be-compounded surface of the steel plate is subjected to oxidation treatment, so that the dissimilar plates are microcosmically engaged at the joint, friction force at the contact surface is increased, deformation tends to be synchronous, and thus the macroscopic interlocking amount is increased, the joint is restrained by a side ring surface and a bottom in the failure process, the stress concentration phenomenon is avoided, and meanwhile, the component force in a loaded direction is also reduced, the axial tension and the radial shear force required by joint failure are improved, and the connection strength of the joint is improved.

A golf club shaft having adjustable stiffness. An elongated tensioning member extends through the shaft and is mounted to both ends of the shaft. A tensioner assembly is mounted to the shaft and is connected to the tensioning member for allowing manual adjustment of the axial tension in the tensioning member, thereby allowing a technician or a user to increase or decrease the stiffness of the shaft as desired.

A bearing cable structure while fabricating panel comprises a steel cable and two sets of fixing members. Each connection section of the steel cable is assembled to the corresponding antiskid ring and then assembled into the axial blind hole of each fixing member and further riveted to the screwing section of each fixing member by machine so that the fixing members are tightly connected to the outer layer of the steel cable and the steel cable and the fixing members are integrated with each other for preventing from falling off, and simultaneously the riveting of the axial blind hole may engage with the outer layer to perform double location so as to strengthen an axial pull strength of the bearing cable structure and increase service life.

The invention discloses a test device for the relationship between tightening torque and angular displacement of a pipe joint, relates to the technical field of pipelines, and includes: a data acquisition device, a clamping transmission component, and a power component and angular displacement respectively connected to both ends of the clamping transmission component The measuring assembly, the power assembly and the angular displacement measuring assembly are connected to the data acquisition device respectively; the clamping transmission assembly includes: a clamping assembly and a transmission assembly, and the clamping assembly includes: a first frame and a sliding A support frame on a frame; transmission components include: connecting rods, connecting seats, conical rubber rings, springs and spring seats. This test device can liberate manpower, obtain accurate data of torque and angular displacement simultaneously and ensure reliable transmission.

The invention discloses a method and device for connecting a metal pipe based on a laser shock wave technology and belongs to the technical field of laser processing. In the invention, a black paint applied to the upper end part of a plugging rod serves as a laser energy absorption layer, and water serves as a restraint layer; a laser pulse beam subjected to parameter optimization enters the interior of a pipe fitting along the axis of the pipe fitting, so as to be irradiated on the absorption layer at the upper end part of the plugging rod through a light guide system; the absorption layer absorbs the energy of the laser so as to be gasified and ionized, thus forming high-voltage plasmas; and the high-voltage plasmas quickly dilate to form a high-amplitude shock wave, thereby promoting the quick dilatational strain of an inner pipe and causing the inner pipe to violently collide with an outer pipe, therefore the parts, which are impacted by the laser shock wave, of the two pipe fittings are plastically deformed obviously; and intensive thermal effect is produced during the collision process so that the interfaces of the collision parts of the two pipes are adhesively jointed together. The method and device provided by the invention are wide in application range, and capable of connecting metal pipe fittings different from each other in melting point, in coefficient of thermal dilation, in thermal treatment condition and in state.

The invention belongs to the technical field of plastic composite pipe material and discloses a coilable type glass fiber reinforced plastic composite pipe. The technical scheme of the coilable type glass fiber reinforced plastic composite pipe is that the composite pipe comprises an inner pipe layer, a reinforced layer and an outer pipe layer, wherein the reinforced layer consists of a coiled layer or a woven layer which is formed of resin-impregnated glass fiber. According to the coilable type glass fiber reinforced plastic composite pipe, the reinforced layer utilizes the resin which is mainly composed of polyether polyol mixture, dibutyl phthalate, polyurethane resin or bisphenol-A epoxy resin, K54 tertiary amine and HG-66 active silicon micro powder, so that the reinforced layer is solidified with the glass fiber to form an integral fiberglass-reinforced structure with bending property. The coilable type glass fiber reinforced plastic composite pipe has the bending property and enough anti-external-pressure property.

The invention particularly relates to a centrifugal type axial strainer which is composed of a fixing sleeve, a toothed sleeve, a pin shaft and at least two centrifugal pendulums. The fixing sleeve is in a shaft sleeve shape as a whole. A toothed sleeve hole is formed in the axial center of the fixing sleeve. At least two pendulum grooves are formed in the peripheral wall of the fixing sleeve, and one end of each pendulum groove is provided with pin holes in the radial direction. At least two tooth rank grooves are formed in the outer surface of the toothed sleeve. Each centrifugal pendulum is in a long-strip shape, the corresponding pin holes are formed in one end of each centrifugal pendulum, and an engaged tooth rank is arranged on the edge of each centrifugal pendulum. The toothed sleeve is inserted in the toothed sleeve hole of the fixing sleeve, then the centrifugal pendulums are placed in the pendulum grooves of the fixing sleeve, engaged teeth of the centrifugal pendulums and the tooth rank grooves in the toothed sleeve are made to be engaged together, and finally the pin shaft is inserted in the pin holes of the fixing sleeve and the pin holes of the centrifugal pendulums, so that the fixing sleeve, the toothed sleeve and the centrifugal pendulums are combined to form a whole. The axial strainer has the beneficial effects that the axial tension force of a rotation shaft can be increased, and a load is stable in operation.

The invention discloses a method of improving bonding performance of a fiber bundle and a potassium magnesium phosphate cement-based material and relates to a manufacturing technology of a fiber-reinforced potassium magnesium phosphate cement composite material. A novel fiber impregnating compound prepared by the method has characteristics such as strong permeability, quick curing, controllable curing speed, high bonding strength, acid resistance, pressure resistance and high temperature resistance. In the fiber bundle cured by the novel fiber impregnating compound, fiber filaments are bonded into an integer by a network structure of -Si-O-Si-, all fiber filaments can be stressed at the same time, and axial tension of the fiber bundle is improved by twice to three times in comparison with that of the un-treated fiber bundle. In the fiber-reinforced MPC(Magnesium Phosphate Cement)-based composite material prepared by the fiber bundle cured by the novel fiber impregnating compound, dead-burned magnesium oxide powder deposited on the surface of the fiber bundle participates in hydration reaction of an MPC base body, so that interface bonding of the fiber bundle and the MPC base body is reinforced; and pulling-drawing force of the fiber bundle is improved by 15%-40% in comparison with that of the fiber bundle treated by an epoxy resin impregnating compound. The method disclosed by the invention is simple in preparation process and convenient to use, and has cost which is only 1 / 10-1 / 6 of that of the epoxy resin fiber impregnating compounds.