36results about How to "Uniform axial force" patented technology

The invention discloses a device for tensile test of a high temperature oxidizable metal material, comprising: a vacuum chamber, a vacuum chamber door, a vacuum system, a temperature control unit, anupper beam loading rod, an upper load transfer frame, a lower beam fixing rod, a lower load transfer frame, an upper ball hinged support, a lower ball hinged support, an upper clamp and a lower clamp;the vacuum chamber door is provided with a transparent observation window and is hinged to the vacuum chamber; the top of the vacuum chamber is a detachable cover; the vacuum system communicates withthe vacuum chamber; the temperature control unit is used for heating a tensile specimen and measuring the temperature of the tensile specimen; and the upper beam loading rod, the upper load transferframe, the lower beam fixing rod, the lower load transfer frame, the upper ball hinged support, the lower ball hinged support, the upper clamp and the lower clamp are disposed inside the vacuum chamber. The invention realizes the automatic centering of the sample through the synergistic relationship of the "circular collimation track-upper ball hinged support and lower ball hinged support-upper clamp and the lower clamp" to ensure that the axial force is uniform, Ensure accurate, reliable results and good reproducibility.

The invention belongs to a steel truss support capable of windowing and a steel truss barrel structure including the same. A node plate (7) is connected with a framed beam (5) and a frame column (6), two ends of a long inclined support (2) are respectively connected with a support rod (8), and the support rod (8) is connected with an end plate (9) and is respectively connected with the framed beam (5) and the frame column (6). A horizontal support (3) is connected with a vertical support (4), the connecting position between the horizontal support (3) and the vertical support (4) is connected with the long inclined support (2), and a short inclined support (1) is respectively connected with the node plate (7) and the long inclined support (2). Connectors of the short inclined support (1), the long inclined support (2), the horizontal support (3), the vertical support (4), the support rod (8) and the end plate (9) are prefabricated by a factory. The steel truss support improves the bearing capacity of the structure by increasing width and thickness of supporting flanges, a window can be arranged at a position where the support is arranged, and the economic benefit and the applicability are improved while steeling using amount is saved.

The invention relates to a crushing device of sintered ore cakes in iron and steel plants, namely a single-roller crusher. The single-roller crusher comprises a rack; the rack is provided with a rotary main shaft; a plurality of tooth rollers with single teeth are ranked on the main shaft; a plurality of single teeth are uniformly distributed along the peripheries of the tooth rollers; an alloy hammer head is fixed on the top side surface of each single tooth; the main shaft is supported to bearing seats at two sides of the rack, and is driven by a driving mechanism and a speed reduction mechanism; in the drive directions of the tooth rollers, from the second tooth roller, the tooth rollers are installed by deviating from the adjacent former roller at a certain equal angle; the deviation angle is equal to the value obtained by dividing an included angle between two single teeth on the tooth rollers by the quantity of the tooth rollers. Under the premise of guaranteeing the high-temperature resistance and abrasion resistance of the device, more attention is paid to research on the service life of the device; through changing the installation angles of the ranked tooth rollers, the axial force is very uniform, the phenomenon of shaft cracking caused by nonuniform stress between the axial force and the radial force is reduced, the main shaft stress is improved, the service life of the main shaft is prolonged, and further the whole service life of the device is prolonged.

The invention belongs to the technical field of building construction, and relates to a steel truss support capable of reserving a door opening and a steel truss tube structure with the support. Node plates (7) are connected with a frame beam (5) and frame columns (6) respectively, a lateral bracing (3) is connected with vertical bracings (4) which are connected with a lower frame beam (10), six bracing pieces (8) which are in pairwise connection through end plates (9) are connected with the frame beam (5) and the frame columns (6) respectively, two bracing pieces (8) are connected with the vertical bracings (4) and the lower frame beam (10), long diagonal bracings (2) are connected with the bracing pieces (8), the lateral bracing (3) and the vertical bracings (4), and short diagonal bracings (1) are connected with the node plates (7) and the long diagonal bracings (2). By the aid of a mode of changing dimensions of the bracings, structural bearing capacity is improved, a door opening can be reserved at bracing position, steel consumption is reduced, and economic benefit and applicability are improved.

The invention discloses a pre-stress applying device for a steel pipe inner support of a deep foundation pit. Compared with the mode of steel material welding reinforcement, the design of a bolt sleeve type support device has the advantages that axial stress is more uniform, and the bolt sleeve type support device is detachable and convenient to assemble and transport. Through the group arrangement of inserting bolt type support rods into sleeves, pre-stress can be gradually applied to a design value by using jacks at different time points for multiple times. Corresponding steel pipes are usedaccording to different support force requirements, the diameters and length of bolts, the number of the sleeves, the number of ribs and the like are made through calculation, and designed pre-stressconstruction requirements can be met when corresponding torque is used. The device is high in practicability, safe and reliable, simple in construction, easy to mount, easy to disassemble, high in efficiency and low in material consumption.

The invention relates to a leakage-proof V-shaped ball valve which comprises a valve body, a valve seat, a V-shaped ball body, a valve rod and a 90-degree drive device. The leakage-proof V-shaped ball valve is characterized in that upper filler and lower filler are installed in a groove-shaped filler box; an upper adjusting block and a lower adjusting block are installed between the upper filler and the lower filler; a disc spring is installed between the upper adjusting block and the lower adjusting block; a left-hand thread is arranged on the lower portion, in contact with the valve rod, of the upper adjusting block; a right-hand thread is arranged on the upper portion, in contact with the valve rod, of the lower adjusting block; the portions, combined with the upper adjusting block and the lower adjusting block; of the valve rod are provided with threads matched with the left-hand thread of the upper adjusting block and the right-hand thread of the lower adjusting block; a gland is installed on the outer wall of the groove-shaped filler box through the threads; and a cushion block presses the upper filler, the upper adjusting block, the disc spring, the lower adjusting block and the lower filler under the action of downward force of the gland. The leakage-proof V-shaped ball valve has the advantages that automatic compensation is conducted after filler abrasion, a dual seal function of combination of soft seal and metal seal is achieved between the valve rod and the filler, the leakage prevention property is good, and the service life is long.

The invention relates to an electric hydraulic ring-plug pump, and belongs to the technical field of hydraulic power element structures. A bearing, an oil distribution sleeve, a spring, a ring plug, a guiding ring, a tilting disc, a driving ring, a tilting disc, a guiding ring, a ring plug, a spring, an oil distribution sleeve, a spring, a ring plug, a guiding ring, a tilting disc, a driving ring, a tilting disc, a guiding ring, a ring plug, a spring, an oil distribution sleeve and a bearing sequentially sleeve a hydraulic pump stator of the electric hydraulic pump from left to right, and abut against each other. The electric hydraulic pump disclosed by the invention is simple in structure and adopts few movable parts, so that the reliability of the electric hydraulic pump is improved, and the cost of the electric hydraulic pump is reduced; the electric hydraulic pump is a two-way hydraulic pump; the distance between a high-pressure oil cavity and a low-pressure oil cavity is long, and equal to the heights of the two ring plugs, and the internal leakage between the high-pressure oil cavity and the low-pressure oil cavity is small; the rigidity of the springs of the hydraulic pump is high, so that the self-sucking capability of the hydraulic pump is high; the electric hydraulic pump is provided with few rotating parts, so that the rotating inertia is small.

The invention discloses a rewinding roll for a rewinding machine. A plurality of air suction ports are formed in the cylindrical surface of the rewinding roll; each air suction port is of a slit type, and the length direction of each slit type air suction port is in parallel with the axis direction of the rewinding roll. Compared with an existing rewinding roll with a circular air suction port, the rewinding roll has the advantages that 1, under the condition that the axial dimension of the rewinding roll is the same, non-suction positions among the air suction ports are reduced, and the adsorbing force of the rewinding roll on paper becomes more successive in the width direction of the paper; 2, the axial force applied on the paper being adsorbed and wound becomes more uniform, and the situation of crinkly paper end cannot appear easily; 3, the rewinding roll can easily guarantee the winding roundness of the end part of the paper while driving the end part of the paper for winding, and the rewinding machine can continuously produce paper roll products with high-quality cores; 4, the adsorbing force of a single air suction is greater, the rewinding roll can easily adsorb paper in higher density and harder texture and smoothly rewind the paper, and the paper adaptability of the rewinding machine is reinforced.

The invention discloses an outer fixing frame experiment table capable of detecting the axial stress condition of a skeleton, and the outer fixing frame experiment table comprises a Taylor outer fixing frame, a pressurization mechanism, a rack, a skeleton model, an upper skeleton fixing part and a lower skeleton fixing part, the pressurization mechanism is fixed on the rack, and the output end ofthe pressurization mechanism is connected with the upper end of the skeleton model through the upper skeleton fixing part. The lower end of the skeleton model is fixed to the rack through the lower skeleton fixing part, and the Taylor outer fixing frame is fixed to the outer side of the skeleton model and fixed to the skeleton model through a steel needle. According to the device, the healing process of the broken bone under the condition that the Taylor outer fixing frame is installed can be simulated in a laboratory environment, the stress condition of each connecting rod of the external fixing frame when axial force is applied to the broken bone in the healing process is detected, and axial mechanical monitoring of the healing process of the bone provided with the Taylor outer fixing frame is achieved in the laboratory environment.

The invention discloses a flexible mounting structure of a rotary blade and a turning and pressing device, and belongs to the technical field of agricultural machinery. The flexible mounting structure comprises a flexible mounting tool apron and a flexible buffering structure, one end of the flexible mounting tool apron is provided with a connecting sleeve structure matched with the connecting end of the rotary blade, the other end of the flexible mounting tool apron is provided with an arc-shaped mounting end, a sliding way is formed in the part, close to a connecting sleeve, of the arc-shaped mounting end, and a boss is arranged on the other corresponding side of the arc-shaped mounting end. The arc-shaped mounting end surrounds a rotary blade mounting shaft, the end with the boss is connected to the mounting shaft, and the flexible buffering structure is connected between the boss and the sliding way of the flexible mounting tool apron on the other corresponding rotary blade. A compression spring in the flexible buffering structure is mounted in a compressed mode and can provide certain pre-tightening force, when a machine works in soil with many gravels or encounters green manure with thick and strong root systems, the flexible mounting tool apron is impacted and buffered through the flexible buffering structure, the flexible mounting tool apron is driven by the flexible buffering structure in the advancing working state of the machine, obstacles in the soil can be smoothly crossed, and the rotary blade is not damaged.

The invention discloses a connecting method of a plastic hollow wall winding pipe joint for traction, and belongs to the field of water supply and discharge. According to the technical scheme, a plastic special-shaped square pipe, melt adhesive, a heating element, a sealing sleeve and a abrasion prevention sleeve are involved, and the connecting step of the winding pipe joint comprises the following connecting steps that cutting is carried out, an end surface is cleaned, the heating element is fixed, the winding pipe joint is abutted jointed, the power supply of the heating element is poweredon, the butt joint is adhered, the butt joint is cooled, the outer surface of the joint is cleaned, the sealing sleeve sleeves the joint, and the abrasion prevention sleeve sleeves the sealing sleeve.The winding pipe joint is firm in connection, the strength is improved, and the connecting method can be widely applied to the field of water supply and discharge.